Beispiele-Übersicht

// Open input document
using (Stream inStream = new FileStream(inPath, FileMode.Open, FileAccess.Read))
using (Document inDoc = Document.Open(inStream, null))
{
    // Create output document
    using Stream outStream = new FileStream(outPath, FileMode.Create, FileAccess.ReadWrite);
    using Document outDoc = Document.Create(outStream, inDoc.Conformance, null);

    // Copy document-wide data
    CopyDocumentData(inDoc, outDoc);

    // Define page copy options
    PageCopyOptions copyOptions = new PageCopyOptions();

    // Copy first page and add annotations
    Page outPage = CopyAndAddAnnotations(outDoc, inDoc.Pages[0], copyOptions);

    // Add the page to the output document's page list
    outDoc.Pages.Add(outPage);

    // Copy the remaining pages and add to the output document's page list
    PageList inPages = inDoc.Pages.GetRange(1, inDoc.Pages.Count - 1);
    PageList outPages = PageList.Copy(outDoc, inPages, copyOptions);
    outDoc.Pages.AddRange(outPages);
}

private static void CopyDocumentData(Document inDoc, Document outDoc)
{
    // Copy document-wide data

    // Output intent
    if (inDoc.OutputIntent != null)
        outDoc.OutputIntent = IccBasedColorSpace.Copy(outDoc, inDoc.OutputIntent);

    // Metadata
    outDoc.Metadata = Metadata.Copy(outDoc, inDoc.Metadata);

    // Viewer settings
    outDoc.ViewerSettings = ViewerSettings.Copy(outDoc, inDoc.ViewerSettings);

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.AssociatedFiles;
    foreach (FileReference inFileRef in inDoc.AssociatedFiles)
        outAssociatedFiles.Add(FileReference.Copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.PlainEmbeddedFiles;
    foreach (FileReference inFileRef in inDoc.PlainEmbeddedFiles)
        outEmbeddedFiles.Add(FileReference.Copy(outDoc, inFileRef));
}

private static Page CopyAndAddAnnotations(Document outDoc, Page inPage, PageCopyOptions copyOptions)
{
    // Copy page to output document
    Page outPage = Page.Copy(outDoc, inPage, copyOptions);

    // Make a RGB color space
    ColorSpace rgb = ColorSpace.CreateProcessColorSpace(outDoc, ProcessColorSpaceType.Rgb);

    // Get the page size for positioning annotations
    Size pageSize = outPage.Size;

    // Get the output page's list of annotations for adding annotations
    AnnotationList annotations = outPage.Annotations;

    // Create a sticky note and add to output page's annotations
    Paint green = Paint.Create(outDoc, rgb, new double[] { 0, 1, 0 }, null);
    Point stickyNoteTopLeft = new Point() { X = 10, Y = pageSize.Height - 10 };
    StickyNote stickyNote = StickyNote.Create(outDoc, stickyNoteTopLeft, "Hello world!", green);
    annotations.Add(stickyNote);

    // Create an ellipse and add to output page's annotations
    Paint blue = Paint.Create(outDoc, rgb, new double[] { 0, 0, 1 }, null);
    Paint yellow = Paint.Create(outDoc, rgb, new double[] { 1, 1, 0 }, null);
    Rectangle ellipseBox = new Rectangle() { Left = 10, Bottom = pageSize.Height - 60, Right = 70, Top = pageSize.Height - 20 };
    EllipseAnnotation ellipse = EllipseAnnotation.Create(outDoc, ellipseBox, new Stroke(blue, 1.5), yellow);
    annotations.Add(ellipse);

    // Create a free text and add to output page's annotations
    Paint yellowTransp = Paint.Create(outDoc, rgb, new double[] { 1, 1, 0 }, new Transparency(0.5));
    Rectangle freeTextBox = new Rectangle() { Left = 10, Bottom = pageSize.Height - 170, Right = 120, Top = pageSize.Height - 70 };
    FreeText freeText = FreeText.Create(outDoc, freeTextBox, "Lorem ipsum dolor sit amet, consectetur adipiscing elit.", yellowTransp);
    annotations.Add(freeText);

    // A highlight and a web-link to be fitted on existing page content elements
    Highlight highlight = null;
    WebLink webLink = null;
    // Extract content elements from the input page
    ContentExtractor extractor = new ContentExtractor(inPage.Content);
    foreach (ContentElement element in extractor)
    {
        // Take the first text element
        if (highlight == null && element is TextElement textElement)
        {
            // Get the quadrilaterals of this text element
            QuadrilateralList quadrilaterals = new QuadrilateralList();
            foreach (TextFragment fragment in textElement.Text)
                quadrilaterals.Add(fragment.Transform.TransformRectangle(fragment.BoundingBox));

            // Create a highlight and add to output page's annotations
            highlight = Highlight.CreateFromQuadrilaterals(outDoc, quadrilaterals, yellow);
            annotations.Add(highlight);
        }

        // Take the first image element
        if (webLink == null && element is ImageElement)
        {
            // Get the quadrilateral of this image
            QuadrilateralList quadrilaterals = new QuadrilateralList();
            quadrilaterals.Add(element.Transform.TransformRectangle(element.BoundingBox));

            // Create a web-link and add to the output page's links
            webLink = WebLink.CreateFromQuadrilaterals(outDoc, quadrilaterals, "https://www.pdf-tools.com");
            Paint red = Paint.Create(outDoc, rgb, new double[] { 1, 0, 0 }, null);
            webLink.BorderStyle = new Stroke(red, 1.5);
            outPage.Links.Add(webLink);
        }

        // Exit loop if highlight and webLink have been created
        if (highlight != null && webLink != null)
            break;
    }

    // return the finished page
    return outPage;
}

try (// Open input document
    FileStream inStream = new FileStream(inPath, FileStream.Mode.READ_ONLY);
    Document inDoc = Document.open(inStream, null);
    // Create file stream
    FileStream outStream = new FileStream(outPath, FileStream.Mode.READ_WRITE_NEW)) {
    try (// Create output document
        Document outDoc = Document.create(outStream, inDoc.getConformance(), null)) {

        // Copy document-wide data
        copyDocumentData(inDoc, outDoc);

        // Define page copy options
        PageCopyOptions copyOptions = new PageCopyOptions();

        // Copy first page and add annotations
        Page outPage = copyAndAddAnnotations(outDoc, inDoc.getPages().get(0), copyOptions);

        // Add the page to the output document's page list
        outDoc.getPages().add(outPage);

        // Copy the remaining pages and add to the output document's page list
        PageList inPages = inDoc.getPages().subList(1, inDoc.getPages().size());
        PageList outPages = PageList.copy(outDoc, inPages, copyOptions);
        outDoc.getPages().addAll(outPages);
    }
}

private static void copyDocumentData(Document inDoc, Document outDoc) throws PdfToolboxException, IOException {
    // Copy document-wide data

    // Output intent
    if (inDoc.getOutputIntent() != null)
        outDoc.setOutputIntent(IccBasedColorSpace.copy(outDoc, inDoc.getOutputIntent()));

    // Metadata
    outDoc.setMetadata(Metadata.copy(outDoc, inDoc.getMetadata()));

    // Viewer settings
    outDoc.setViewerSettings(ViewerSettings.copy(outDoc, inDoc.getViewerSettings()));

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.getAssociatedFiles();
    for (FileReference inFileRef : inDoc.getAssociatedFiles())
        outAssociatedFiles.add(FileReference.copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.getPlainEmbeddedFiles();
    for (FileReference inFileRef : inDoc.getPlainEmbeddedFiles())
        outEmbeddedFiles.add(FileReference.copy(outDoc, inFileRef));
}

private static Page copyAndAddAnnotations(Document outDoc, Page inPage, PageCopyOptions copyOptions) throws ConformanceException, CorruptException, IOException, UnsupportedFeatureException {
    // Copy page to output document
    Page outPage = Page.copy(outDoc, inPage, copyOptions);

    // Make a RGB color space
    ColorSpace rgb = ColorSpace.createProcessColorSpace(outDoc, ProcessColorSpaceType.RGB);

    // Get the page size for positioning annotations
    Size pageSize = outPage.getSize();

    // Get the output page's list of annotations for adding annotations
    AnnotationList annotations = outPage.getAnnotations();

    // Create a sticky note and add to output page's annotations
    Paint green = Paint.create(outDoc, rgb, new double[] { 0, 1, 0 }, null);
    Point stickyNoteTopLeft = new Point(10, pageSize.height - 10 );
    StickyNote stickyNote = StickyNote.create(outDoc, stickyNoteTopLeft, "Hello world!", green);
    annotations.add(stickyNote);

    // Create an ellipse and add to output page's annotations
    Paint blue = Paint.create(outDoc, rgb, new double[] { 0, 0, 1 }, null);
    Paint yellow = Paint.create(outDoc, rgb, new double[] { 1, 1, 0 }, null);
    Rectangle ellipseBox = new Rectangle(10, pageSize.height - 60, 70, pageSize.height - 20);
    EllipseAnnotation ellipse = EllipseAnnotation.create(outDoc, ellipseBox, new Stroke(blue, 1.5), yellow);
    annotations.add(ellipse);

    // Create a free text and add to output page's annotations
    Paint yellowTransp = Paint.create(outDoc, rgb, new double[] { 1, 1, 0 }, new Transparency(0.5));
    Rectangle freeTextBox = new Rectangle(10, pageSize.height - 170, 120, pageSize.height - 70);
    FreeText freeText = FreeText.create(outDoc, freeTextBox, "Lorem ipsum dolor sit amet, consectetur adipiscing elit.", yellowTransp);
    annotations.add(freeText);

    // A highlight and a web-link to be fitted on existing page content elements
    Highlight highlight = null;
    WebLink webLink = null;
    // Extract content elements from the input page
    ContentExtractor extractor = new ContentExtractor(inPage.getContent());
    for (ContentElement element : extractor) {
        // Take the first text element
        if (highlight == null && element instanceof TextElement) {
            TextElement textElement = (TextElement)element;
            // Get the quadrilaterals of this text element
            QuadrilateralList quadrilaterals = new QuadrilateralList();
            for (TextFragment fragment : textElement.getText())
                quadrilaterals.add(fragment.getTransform().transformRectangle(fragment.getBoundingBox()));

                // Create a highlight and add to output page's annotations
                highlight = Highlight.createFromQuadrilaterals(outDoc, quadrilaterals, yellow);
                annotations.add(highlight);
            }

        // Take the first image element
        if (webLink == null && element instanceof ImageElement) {
            // Get the quadrilateral of this image
            QuadrilateralList quadrilaterals = new QuadrilateralList();
            quadrilaterals.add(element.getTransform().transformRectangle(element.getBoundingBox()));

            // Create a web-link and add to the output page's links
            webLink = WebLink.createFromQuadrilaterals(outDoc, quadrilaterals, "https://www.pdf-tools.com");
            Paint red = Paint.create(outDoc, rgb, new double[] { 1, 0, 0 }, null);
            webLink.setBorderStyle(new Stroke(red, 1.5));
            outPage.getLinks().add(webLink);
        }

        // Exit loop if highlight and webLink have been created
        if (highlight != null && webLink != null)
            break;
    }

    // return the finished page
    return outPage;
}

// Open input document
using (Stream inStream = new FileStream(inPath, FileMode.Open, FileAccess.Read))
using (Document inDoc = Document.Open(inStream, null))

// Create file stream
using (Stream fontStream = new FileStream(fontPath, FileMode.Open, FileAccess.Read))

// Create output document
using (Stream outStream = new FileStream(outPath, FileMode.Create, FileAccess.ReadWrite))
using (Document outDoc = Document.Create(outStream, inDoc.Conformance, null))
{
    // Copy document-wide data
    CopyDocumentData(inDoc, outDoc);

    // Create embedded font in output document
    Font font = Font.Create(outDoc, fontStream, true);

    // Define page copy options
    PageCopyOptions copyOptions = new PageCopyOptions();

    // Copy first page, add barcode, and append to output document
    Page outPage = Page.Copy(outDoc, inDoc.Pages[0], copyOptions);
    AddBarcode(outDoc, outPage, barcode, font, 50);
    outDoc.Pages.Add(outPage);

    // Copy remaining pages and append to output document
    PageList inPageRange = inDoc.Pages.GetRange(1, inDoc.Pages.Count - 1);
    PageList copiedPages = PageList.Copy(outDoc, inPageRange, copyOptions);
    outDoc.Pages.AddRange(copiedPages);
}

private static void CopyDocumentData(Document inDoc, Document outDoc)
{
    // Copy document-wide data

    // Output intent
    if (inDoc.OutputIntent != null)
        outDoc.OutputIntent = IccBasedColorSpace.Copy(outDoc, inDoc.OutputIntent);

    // Metadata
    outDoc.Metadata = Metadata.Copy(outDoc, inDoc.Metadata);

    // Viewer settings
    outDoc.ViewerSettings = ViewerSettings.Copy(outDoc, inDoc.ViewerSettings);

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.AssociatedFiles;
    foreach (FileReference inFileRef in inDoc.AssociatedFiles)
        outAssociatedFiles.Add(FileReference.Copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.PlainEmbeddedFiles;
    foreach (FileReference inFileRef in inDoc.PlainEmbeddedFiles)
        outEmbeddedFiles.Add(FileReference.Copy(outDoc, inFileRef));
}

private static void AddBarcode(Document outputDoc, Page outPage, string barcode,
    Font font, double fontSize)
{
    // Create content generator 
    using ContentGenerator gen = new ContentGenerator(outPage.Content, false);

    // Create text object
    Text barcodeText = Text.Create(outputDoc);

    // Create text generator
    using (TextGenerator textGenerator = new TextGenerator(barcodeText, font, fontSize, null))
    {
        // Calculate position
        Point position = new Point
        {
            X = outPage.Size.Width - (textGenerator.GetWidth(barcode) + Border),
            Y = outPage.Size.Height - (fontSize * (font.Ascent + font.Descent) + Border)
        };

        // Move to position
        textGenerator.MoveTo(position);
        // Add given barcode string
        textGenerator.ShowLine(barcode);
    }
    // Paint the positioned barcode text
    gen.PaintText(barcodeText);
}

try (// Open input document
    FileStream inStream = new FileStream(inPath, FileStream.Mode.READ_ONLY);
    Document inDoc = Document.open(inStream, null);
    // Create file stream
    FileStream fontStream = new FileStream(fontPath, FileStream.Mode.READ_ONLY);
    FileStream outStream = new FileStream(outPath, FileStream.Mode.READ_WRITE_NEW)) {
    try (// Create output document
        Document outDoc = Document.create(outStream, inDoc.getConformance(), null)) {

        // Copy document-wide data
        copyDocumentData(inDoc, outDoc);

        // Create embedded font in output document
        Font font = Font.create(outDoc, fontStream, true);

        // Define page copy options
        PageCopyOptions copyOptions = new PageCopyOptions();

        // Copy first page, add barcode, and append to output document
        Page outPage = Page.copy(outDoc, inDoc.getPages().get(0), copyOptions);
        addBarcode(outDoc, outPage, barcode, font, 50);
        outDoc.getPages().add(outPage);

        // Copy remaining pages and append to output document
        PageList inPageRange = inDoc.getPages().subList(1, inDoc.getPages().size());
        PageList copiedPages = PageList.copy(outDoc, inPageRange, copyOptions);
        outDoc.getPages().addAll(copiedPages);
    }
}

private static void copyDocumentData(Document inDoc, Document outDoc) throws PdfToolboxException, IOException {
    // Copy document-wide data

    // Output intent
    if (inDoc.getOutputIntent() != null)
        outDoc.setOutputIntent(IccBasedColorSpace.copy(outDoc, inDoc.getOutputIntent()));

    // Metadata
    outDoc.setMetadata(Metadata.copy(outDoc, inDoc.getMetadata()));

    // Viewer settings
    outDoc.setViewerSettings(ViewerSettings.copy(outDoc, inDoc.getViewerSettings()));

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.getAssociatedFiles();
    for (FileReference inFileRef : inDoc.getAssociatedFiles())
        outAssociatedFiles.add(FileReference.copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.getPlainEmbeddedFiles();
    for (FileReference inFileRef : inDoc.getPlainEmbeddedFiles())
        outEmbeddedFiles.add(FileReference.copy(outDoc, inFileRef));
}

private static void addBarcode(Document outputDoc, Page outPage, String barcode, Font font, double fontSize) throws PdfToolboxException, IOException {
    try (// Create content generator
        ContentGenerator generator = new ContentGenerator(outPage.getContent(), false)) {
        // Create text object
        Text barcodeText = Text.create(outputDoc);

        // Create a text generator
        TextGenerator textgenerator = new TextGenerator(barcodeText, font, fontSize, null);

        // Calculate position
        Point position = new Point(outPage.getSize().width - (textgenerator.getWidth(barcode) + Border),
                outPage.getSize().height - (fontSize * (font.getAscent() + font.getDescent()) + Border));

        // Move to position
        textgenerator.moveTo(position);
        // Add given barcode string
        textgenerator.showLine(barcode);
        // Close text generator
        textgenerator.close();

        // Paint the positioned barcode text
        generator.paintText(barcodeText);
    }
}

// Open input document
pInStream = _tfopen(szInPath, _T("rb"));
GOTO_CLEANUP_IF_NULL(pInStream, _T("Failed to open input file \"%s\".\n"), szInPath);
PtxSysCreateFILEStreamDescriptor(&descriptor, pInStream, 0);
pInDoc = PtxPdf_Document_Open(&descriptor, _T(""));
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInDoc, _T("Input file \"%s\" cannot be opened. %s (ErrorCode: 0x%08x).\n"), szInPath, szErrorBuff, Ptx_GetLastError());

// Create file stream
pFontStream = _tfopen(szFontPath, _T("rb"));
GOTO_CLEANUP_IF_NULL(pFontStream, _T("Failed to open font file."));
PtxSysCreateFILEStreamDescriptor(&fontDescriptor, pFontStream, 0);

// Create output document
pOutStream = _tfopen(szOutPath, _T("wb+"));
GOTO_CLEANUP_IF_NULL(pOutStream, _T("Failed to open output file \"%s\".\n"), szOutPath);
PtxSysCreateFILEStreamDescriptor(&outDescriptor, pOutStream, 0);
iConformance = PtxPdf_Document_GetConformance(pInDoc);
pOutDoc = PtxPdf_Document_Create(&outDescriptor, &iConformance, NULL);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutDoc, _T("Output file \"%s\" cannot be created. %s (ErrorCode: 0x%08x).\n"), szOutPath, szErrorBuff, Ptx_GetLastError());
pFont = PtxPdfContent_Font_Create(pOutDoc, &fontDescriptor, TRUE);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pFont, _T("Failed to create font. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Copy document-wide data
GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(copyDocumentData(pInDoc, pOutDoc), _T("Failed to copy document-wide data. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Configure copy options
pCopyOptions = PtxPdf_PageCopyOptions_New();

// Get page lists of input and output document
pInPageList = PtxPdf_Document_GetPages(pInDoc);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInPageList, _T("Failed to get the pages of the input document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
pOutPageList = PtxPdf_Document_GetPages(pOutDoc);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutPageList, _T("Failed to get the pages of the output document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Copy first page
pInPage = PtxPdf_PageList_Get(pInPageList, 0);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInPage, _T("Failed to get the first page. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
pOutPage = PtxPdf_Page_Copy(pOutDoc, pInPage, pCopyOptions);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutPage, _T("Failed to copy page. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Add barcode image to copied page
if (addBarcode(pOutDoc, pOutPage, szBarcode, pFont, 50) != 0)
    goto cleanup;

// Add page to output document
GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdf_PageList_Add(pOutPageList, pOutPage), _T("Failed to add page to output document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Get remaining pages from input
pInPageRange = PtxPdf_PageList_GetRange(pInPageList, 1, PtxPdf_PageList_GetCount(pInPageList) - 1);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInPageRange, _T("Failed to get page range from input document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Copy remaining pages to output
pOutPageRange = PtxPdf_PageList_Copy(pOutDoc, pInPageRange, pCopyOptions);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutPageRange, _T("Failed to copy page range to output document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Add the copied pages to the output document
GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdf_PageList_AddRange(pOutPageList, pOutPageRange), _T("Failed to add page range to output page list. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

int copyDocumentData(TPtxPdf_Document * pInDoc, TPtxPdf_Document * pOutDoc)
{
    TPtxPdf_FileReferenceList* pInFileRefList;
    TPtxPdf_FileReferenceList* pOutFileRefList;

    // Output intent
    if (PtxPdf_Document_GetOutputIntent(pInDoc) != NULL)
        if (PtxPdf_Document_SetOutputIntent(pOutDoc, PtxPdfContent_IccBasedColorSpace_Copy(pOutDoc, PtxPdf_Document_GetOutputIntent(pInDoc))) == FALSE)
            return FALSE;

    // Metadata
    if (PtxPdf_Document_SetMetadata(pOutDoc, PtxPdf_Metadata_Copy(pOutDoc, PtxPdf_Document_GetMetadata(pInDoc))) == FALSE)
        return FALSE;

    // Viewer settings
    if (PtxPdf_Document_SetViewerSettings(pOutDoc, PtxPdfNav_ViewerSettings_Copy(pOutDoc, PtxPdf_Document_GetViewerSettings(pInDoc))) == FALSE)
        return FALSE;

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    pInFileRefList = PtxPdf_Document_GetAssociatedFiles(pInDoc);
    pOutFileRefList = PtxPdf_Document_GetAssociatedFiles(pOutDoc);
    if (pInFileRefList == NULL || pOutFileRefList == NULL)
        return FALSE;
    for (int iFileRef = 0; iFileRef < PtxPdf_FileReferenceList_GetCount(pInFileRefList); iFileRef++)
        if (PtxPdf_FileReferenceList_Add(pOutFileRefList, PtxPdf_FileReference_Copy(pOutDoc, PtxPdf_FileReferenceList_Get(pInFileRefList, iFileRef))) == FALSE)
            return FALSE;

    // Plain embedded files
    pInFileRefList = PtxPdf_Document_GetPlainEmbeddedFiles(pInDoc);
    pOutFileRefList = PtxPdf_Document_GetPlainEmbeddedFiles(pOutDoc);
    if (pInFileRefList == NULL || pOutFileRefList == NULL)
        return FALSE;
    for (int iFileRef = 0; iFileRef < PtxPdf_FileReferenceList_GetCount(pInFileRefList); iFileRef++)
        if (PtxPdf_FileReferenceList_Add(pOutFileRefList, PtxPdf_FileReference_Copy(pOutDoc, PtxPdf_FileReferenceList_Get(pInFileRefList, iFileRef))) == FALSE)
            return FALSE;

    return TRUE;
}

int addBarcode(TPtxPdf_Document* pOutDoc, TPtxPdf_Page* pOutPage, TCHAR* szBarcode, TPtxPdfContent_Font* pFont, double dFontSize)
{
    TPtxPdfContent_Content* pContent = NULL;
    TPtxPdfContent_ContentGenerator* pGenerator = NULL;
    TPtxPdfContent_Text* pBarcodeText = NULL;
    TPtxPdfContent_TextGenerator* pTextGenerator = NULL;

    pContent = PtxPdf_Page_GetContent(pOutPage);

    // Create content generator
    pGenerator = PtxPdfContent_ContentGenerator_New(pContent, FALSE);
    GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pGenerator, _T("Failed to create a content generator. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

    // Create text object
    pBarcodeText = PtxPdfContent_Text_Create(pOutDoc);
    GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pBarcodeText, _T("Failed to create a text object. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

    // Create text generator
    pTextGenerator = PtxPdfContent_TextGenerator_New(pBarcodeText, pFont, dFontSize, NULL);
    GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pTextGenerator, _T("Failed to create a text generator. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

    // Calculate position
    TPtxGeomReal_Size size;
    PtxPdf_Page_GetSize(pOutPage, &size);
    TPtxGeomReal_Point position;
    double dTextWidth = PtxPdfContent_TextGenerator_GetWidth(pTextGenerator, szBarcode);
    GOTO_CLEANUP_IF_NEGATIVE_PRINT_ERROR(dTextWidth, _T("%s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
    double dFontAscent = PtxPdfContent_Font_GetAscent(pFont);
    GOTO_CLEANUP_IF_NEGATIVE_PRINT_ERROR(dFontAscent, _T("%s(ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
    double dFontDescent = PtxPdfContent_Font_GetDescent(pFont);
    GOTO_CLEANUP_IF_NEGATIVE_PRINT_ERROR(dFontDescent, _T("%s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
    position.dX = size.dWidth - (dTextWidth + dBorder);
    position.dY = size.dHeight - (dFontSize * (dFontAscent + dFontDescent) + dBorder);

    // Move to position
    GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdfContent_TextGenerator_MoveTo(pTextGenerator, &position), _T("Failed to move to position %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
    // Add given barcode string
    GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdfContent_TextGenerator_ShowLine(pTextGenerator, szBarcode), _T("Failed to add barcode string. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

    // Close text generator
    if (pTextGenerator != NULL)
        PtxPdfContent_TextGenerator_Close(pTextGenerator);

    // Paint the positioned barcode text
    GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdfContent_ContentGenerator_PaintText(pGenerator, pBarcodeText), _T("Failed to paint the positioned barcode text. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

cleanup:
    if (pGenerator != NULL)
        PtxPdfContent_ContentGenerator_Close(pGenerator);

    return iReturnValue;
}

// Open input document 
using (Stream inStream = new FileStream(inPath, FileMode.Open, FileAccess.Read))
using (Document inDoc = Document.Open(inStream, null))

// Create output document
using (Stream outStream = new FileStream(outPath, FileMode.Create, FileAccess.ReadWrite))
using (Document outDoc = Document.Create(outStream, inDoc.Conformance, null))
{
    // Copy document-wide data
    CopyDocumentData(inDoc, outDoc);

    // Define page copy options
    PageCopyOptions copyOptions = new PageCopyOptions();

    // Copy first page, add datamatrix image, and append to output document
    Page outPage = Page.Copy(outDoc, inDoc.Pages[0], copyOptions);
    AddDataMatrix(outDoc, outPage, datamatrixPath);
    outDoc.Pages.Add(outPage);

    // Copy remaining pages and append to output document
    PageList inPageRange = inDoc.Pages.GetRange(1, inDoc.Pages.Count - 1);
    PageList copiedPages = PageList.Copy(outDoc, inPageRange, copyOptions);
    outDoc.Pages.AddRange(copiedPages);
}

private static void CopyDocumentData(Document inDoc, Document outDoc)
{
    // Copy document-wide data

    // Output intent
    if (inDoc.OutputIntent != null)
        outDoc.OutputIntent = IccBasedColorSpace.Copy(outDoc, inDoc.OutputIntent);

    // Metadata
    outDoc.Metadata = Metadata.Copy(outDoc, inDoc.Metadata);

    // Viewer settings
    outDoc.ViewerSettings = ViewerSettings.Copy(outDoc, inDoc.ViewerSettings);

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.AssociatedFiles;
    foreach (FileReference inFileRef in inDoc.AssociatedFiles)
        outAssociatedFiles.Add(FileReference.Copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.PlainEmbeddedFiles;
    foreach (FileReference inFileRef in inDoc.PlainEmbeddedFiles)
        outEmbeddedFiles.Add(FileReference.Copy(outDoc, inFileRef));
}

private static void AddDataMatrix(Document document, Page page, string datamatrixPath)
{
    // Create content generator
    using ContentGenerator generator = new ContentGenerator(page.Content, false);

    // Import data matrix
    using Stream inMatrix = new FileStream(datamatrixPath, FileMode.Open, FileAccess.Read);

    // Create image object for data matrix
    Image datamatrix = Image.Create(document, inMatrix);

    // Data matrix size
    double datamatrixSize = 85;

    // Calculate Rectangle for data matrix
    Rectangle rect = new Rectangle
    {
        Left = Border,
        Bottom = page.Size.Height - (datamatrixSize + Border),
        Right = datamatrixSize + Border,
        Top = page.Size.Height - Border
    };

    // Paint image of data matrix into the specified rectangle 
    generator.PaintImage(datamatrix, rect);
}

try (// Open input document
    FileStream inStream = new FileStream(inPath, FileStream.Mode.READ_ONLY);
    Document inDoc = Document.open(inStream, null);
    FileStream outStream = new FileStream(outPath, FileStream.Mode.READ_WRITE_NEW)) {
    try (// Create output document
        Document outDoc = Document.create(outStream, inDoc.getConformance(), null)) {

        // Copy document-wide data
        copyDocumentData(inDoc, outDoc);

        // Define page copy options
        PageCopyOptions copyOptions = new PageCopyOptions();

        // Copy first page, add data matrix image, and append to output document
        Page outPage = Page.copy(outDoc, inDoc.getPages().get(0), copyOptions);
        addDatamatrix(outDoc, outPage, datamatrixPath);
        outDoc.getPages().add(outPage);

        // Copy remaining pages and append to output document
        PageList inPageRange = inDoc.getPages().subList(1, inDoc.getPages().size());
        PageList copiedPages = PageList.copy(outDoc, inPageRange, copyOptions);
        outDoc.getPages().addAll(copiedPages);
    }
}

private static void copyDocumentData(Document inDoc, Document outDoc) throws PdfToolboxException, IOException {
    // Copy document-wide data

    // Output intent
    if (inDoc.getOutputIntent() != null)
        outDoc.setOutputIntent(IccBasedColorSpace.copy(outDoc, inDoc.getOutputIntent()));

    // Metadata
    outDoc.setMetadata(Metadata.copy(outDoc, inDoc.getMetadata()));

    // Viewer settings
    outDoc.setViewerSettings(ViewerSettings.copy(outDoc, inDoc.getViewerSettings()));

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.getAssociatedFiles();
    for (FileReference inFileRef : inDoc.getAssociatedFiles())
        outAssociatedFiles.add(FileReference.copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.getPlainEmbeddedFiles();
    for (FileReference inFileRef : inDoc.getPlainEmbeddedFiles())
        outEmbeddedFiles.add(FileReference.copy(outDoc, inFileRef));
}

private static void addDatamatrix(Document document, Page page, String datamatrixPath)
        throws PdfToolboxException, IOException {
    try (// Create content generator
        ContentGenerator generator = new ContentGenerator(page.getContent(), false);
        // Import data matrix
        FileStream inMatrix = new FileStream(datamatrixPath, FileStream.Mode.READ_ONLY)) {

        // Create image object for data matrix
        Image datamatrix = Image.create(document, inMatrix);

        // Data matrix size
        double datamatrixSize = 85;

        // Calculate Rectangle for data matrix
        Rectangle rect = new Rectangle(Border, page.getSize().height - (datamatrixSize + Border),
                datamatrixSize + Border, page.getSize().height - Border);

        // Paint image of data matrix into the specified rectangle
        generator.paintImage(datamatrix, rect);
    }
}

// Open input document
pInStream = _tfopen(szInPath, _T("rb"));
GOTO_CLEANUP_IF_NULL(pInStream, _T("Failed to open input file \"%s\".\n"), szInPath);
PtxSysCreateFILEStreamDescriptor(&descriptor, pInStream, 0);
pInDoc = PtxPdf_Document_Open(&descriptor, _T(""));
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInDoc, _T("Input file \"%s\" cannot be opened. %s (ErrorCode: 0x%08x).\n"), szInPath, szErrorBuff, Ptx_GetLastError());

// Create output document
pOutStream = _tfopen(szOutPath, _T("wb+"));
GOTO_CLEANUP_IF_NULL(pOutStream, _T("Failed to open output file \"%s\".\n"), szOutPath);
PtxSysCreateFILEStreamDescriptor(&outDescriptor, pOutStream, 0);
iConformance = PtxPdf_Document_GetConformance(pInDoc);
pOutDoc = PtxPdf_Document_Create(&outDescriptor, &iConformance, NULL);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutDoc, _T("Output file \"%s\" cannot be created. %s (ErrorCode: 0x%08x).\n"), szOutPath, szErrorBuff, Ptx_GetLastError());

// Create embedded font in output document
pFont = PtxPdfContent_Font_CreateFromSystem(pOutDoc, _T("Arial"), _T("Italic"), TRUE);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pFont, _T("Failed to create font. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Copy document-wide data
GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(copyDocumentData(pInDoc, pOutDoc), _T("Failed to copy document-wide data. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Configure copy options
pCopyOptions = PtxPdf_PageCopyOptions_New();

// Get page lists of input and output document
pInPageList = PtxPdf_Document_GetPages(pInDoc);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInPageList, _T("Failed to get the pages of the input document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
pOutPageList = PtxPdf_Document_GetPages(pOutDoc);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutPageList, _T("Failed to get the pages of the output document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Copy first page
pInPage = PtxPdf_PageList_Get(pInPageList, 0);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInPage, _T("Failed to get the first page. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
pOutPage = PtxPdf_Page_Copy(pOutDoc, pInPage, pCopyOptions);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutPage, _T("Failed to copy page. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Add datamatrix image to copied page
if (addDataMatrix(pOutDoc, pOutPage, szDatamatrixPath) != 0)
    goto cleanup;

// Add page to output document
GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdf_PageList_Add(pOutPageList, pOutPage), _T("Failed to add page to output document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Get remaining pages from input
pInPageRange = PtxPdf_PageList_GetRange(pInPageList, 1, PtxPdf_PageList_GetCount(pInPageList) - 1);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInPageRange, _T("Failed to get page range from input document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Copy remaining pages to output
pOutPageRange = PtxPdf_PageList_Copy(pOutDoc, pInPageRange, pCopyOptions);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutPageRange, _T("Failed to copy page range to output document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Add the copied pages to the output document
GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdf_PageList_AddRange(pOutPageList, pOutPageRange), _T("Failed to add page range to output page list. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

int copyDocumentData(TPtxPdf_Document * pInDoc, TPtxPdf_Document * pOutDoc)
{
    TPtxPdf_FileReferenceList* pInFileRefList;
    TPtxPdf_FileReferenceList* pOutFileRefList;

    // Output intent
    if (PtxPdf_Document_GetOutputIntent(pInDoc) != NULL)
        if (PtxPdf_Document_SetOutputIntent(pOutDoc, PtxPdfContent_IccBasedColorSpace_Copy(pOutDoc, PtxPdf_Document_GetOutputIntent(pInDoc))) == FALSE)
            return FALSE;

    // Metadata
    if (PtxPdf_Document_SetMetadata(pOutDoc, PtxPdf_Metadata_Copy(pOutDoc, PtxPdf_Document_GetMetadata(pInDoc))) == FALSE)
        return FALSE;

    // Viewer settings
    if (PtxPdf_Document_SetViewerSettings(pOutDoc, PtxPdfNav_ViewerSettings_Copy(pOutDoc, PtxPdf_Document_GetViewerSettings(pInDoc))) == FALSE)
        return FALSE;

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    pInFileRefList = PtxPdf_Document_GetAssociatedFiles(pInDoc);
    pOutFileRefList = PtxPdf_Document_GetAssociatedFiles(pOutDoc);
    if (pInFileRefList == NULL || pOutFileRefList == NULL)
        return FALSE;
    for (int iFileRef = 0; iFileRef < PtxPdf_FileReferenceList_GetCount(pInFileRefList); iFileRef++)
        if (PtxPdf_FileReferenceList_Add(pOutFileRefList, PtxPdf_FileReference_Copy(pOutDoc, PtxPdf_FileReferenceList_Get(pInFileRefList, iFileRef))) == FALSE)
            return FALSE;

    // Plain embedded files
    pInFileRefList = PtxPdf_Document_GetPlainEmbeddedFiles(pInDoc);
    pOutFileRefList = PtxPdf_Document_GetPlainEmbeddedFiles(pOutDoc);
    if (pInFileRefList == NULL || pOutFileRefList == NULL)
        return FALSE;
    for (int iFileRef = 0; iFileRef < PtxPdf_FileReferenceList_GetCount(pInFileRefList); iFileRef++)
        if (PtxPdf_FileReferenceList_Add(pOutFileRefList, PtxPdf_FileReference_Copy(pOutDoc, PtxPdf_FileReferenceList_Get(pInFileRefList, iFileRef))) == FALSE)
            return FALSE;

    return TRUE;
}

int addDataMatrix(TPtxPdf_Document* pOutDoc, TPtxPdf_Page* pOutPage, TCHAR* szDataMatrixPath)
{
    TPtxPdfContent_Content* pContent = NULL;
    TPtxPdfContent_ContentGenerator* pGenerator = NULL;
    TPtxSys_StreamDescriptor datamatrixDescriptor;
    FILE* pDatamatrixStream = NULL;
    TPtxPdfContent_Image* pDatamatrix = NULL;

    pContent = PtxPdf_Page_GetContent(pOutPage);

    // Create content generator
    pGenerator = PtxPdfContent_ContentGenerator_New(pContent, FALSE);
    GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pGenerator, _T("Failed to create a content generator. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

    // Import data matrix
    pDatamatrixStream = _tfopen(szDataMatrixPath, _T("rb"));
    GOTO_CLEANUP_IF_NULL(pDatamatrixStream, _T("Failed to open data matrix file \"%s\".\n"), szDataMatrixPath);
    PtxSysCreateFILEStreamDescriptor(&datamatrixDescriptor, pDatamatrixStream, 0);

    // Create image object for data matrix
    pDatamatrix = PtxPdfContent_Image_Create(pOutDoc, &datamatrixDescriptor);
    GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pDatamatrix, _T("Failed to create image object. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

    // Data matrix size
    double dDatamatrixSize = 85.0;

    // Calculate Rectangle for data matrix
    TPtxGeomReal_Size size;
    PtxPdf_Page_GetSize(pOutPage, &size);
    TPtxGeomReal_Rectangle rect;
    rect.dLeft = dBorder;
    rect.dBottom = size.dHeight - (dDatamatrixSize + dBorder);
    rect.dRight = dDatamatrixSize + dBorder;
    rect.dTop = size.dHeight - dBorder;

    // Paint image of data matrix into the specified rectangle
    GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdfContent_ContentGenerator_PaintImage(pGenerator, pDatamatrix, &rect), _T("Failed to paint data matrix into the specified rectangle. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

cleanup:
    if (pGenerator != NULL)
        PtxPdfContent_ContentGenerator_Close(pGenerator);
    if (pContent != NULL)
        Ptx_Release(pContent);

    return iReturnValue;
}

// Open input document 
using (Stream inStream = new FileStream(inPath, FileMode.Open, FileAccess.Read))
using (Document inDoc = Document.Open(inStream, null))

// Create output document
using (Stream outStream = new FileStream(outPath, FileMode.Create, FileAccess.ReadWrite))
using (Document outDoc = Document.Create(outStream, inDoc.Conformance, null))
{
    // Copy document-wide data
    CopyDocumentData(inDoc, outDoc);

    // Define page copy options
    PageCopyOptions copyOptions = new PageCopyOptions();

    // Copy pages preceding selected page and append do output document
    PageList inPageRange = inDoc.Pages.GetRange(0, pageNumber - 1);
    PageList copiedPages = PageList.Copy(outDoc, inPageRange, copyOptions);
    outDoc.Pages.AddRange(copiedPages);

    // Copy selected page, add image, and append to output document
    Page outPage = Page.Copy(outDoc, inDoc.Pages[pageNumber - 1], copyOptions);
    AddImage(outDoc, outPage, imagePath, 150, 150);
    outDoc.Pages.Add(outPage);

    // Copy remaining pages and append to output document
    inPageRange = inDoc.Pages.GetRange(pageNumber, inDoc.Pages.Count - pageNumber);
    copiedPages = PageList.Copy(outDoc, inPageRange, copyOptions);
    outDoc.Pages.AddRange(copiedPages);
}

private static void CopyDocumentData(Document inDoc, Document outDoc)
{
    // Copy document-wide data

    // Output intent
    if (inDoc.OutputIntent != null)
        outDoc.OutputIntent = IccBasedColorSpace.Copy(outDoc, inDoc.OutputIntent);

    // Metadata
    outDoc.Metadata = Metadata.Copy(outDoc, inDoc.Metadata);

    // Viewer settings
    outDoc.ViewerSettings = ViewerSettings.Copy(outDoc, inDoc.ViewerSettings);

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.AssociatedFiles;
    foreach (FileReference inFileRef in inDoc.AssociatedFiles)
        outAssociatedFiles.Add(FileReference.Copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.PlainEmbeddedFiles;
    foreach (FileReference inFileRef in inDoc.PlainEmbeddedFiles)
        outEmbeddedFiles.Add(FileReference.Copy(outDoc, inFileRef));
}

private static void AddImage(Document document, Page page, string imagePath, double x, double y)
{
    // Create content generator 
    using ContentGenerator generator = new ContentGenerator(page.Content, false);

    // Load image from input path
    using Stream inImage = new FileStream(imagePath, FileMode.Open, FileAccess.Read);

    // Create image object
    Image image = Image.Create(document, inImage);
    double resolution = 150;

    // Calculate rectangle for image 
    PdfTools.FourHeights.PdfToolbox.Geometry.Integer.Size size = image.Size;
    Rectangle rect = new Rectangle
    {
        Left = x,
        Bottom = y,
        Right = x + size.Width * 72 / resolution,
        Top = y + size.Height * 72 / resolution
    };

    // Paint image into the specified rectangle 
    generator.PaintImage(image, rect);
}

try (// Open input document
    FileStream inStream = new FileStream(inPath, FileStream.Mode.READ_ONLY);
    Document inDoc = Document.open(inStream, null);
    FileStream outStream = new FileStream(outPath, FileStream.Mode.READ_WRITE_NEW)) {
    try (// Create output document
        Document outDoc = Document.create(outStream, inDoc.getConformance(), null)) {

        // Copy document-wide data
        copyDocumentData(inDoc, outDoc);

        // Define page copy options
        PageCopyOptions copyOptions = new PageCopyOptions();

        // Copy pages preceding selected page and append to output document
        PageList inPageRange = inDoc.getPages().subList(0, pageNumber - 1);
        PageList copiedPages = PageList.copy(outDoc, inPageRange, copyOptions);
        outDoc.getPages().addAll(copiedPages);

        // Copy selected page, add image, and append to output document
        Page outPage = Page.copy(outDoc, inDoc.getPages().get(pageNumber - 1), copyOptions);
        addImage(outDoc, outPage, imagePath, 150, 150);
        outDoc.getPages().add(outPage);

        // Copy remaining pages and append to output document
        inPageRange = inDoc.getPages().subList(pageNumber, inDoc.getPages().size());
        copiedPages = PageList.copy(outDoc, inPageRange, copyOptions);
        outDoc.getPages().addAll(copiedPages);
    }
}

private static void copyDocumentData(Document inDoc, Document outDoc) throws PdfToolboxException, IOException {
    // Copy document-wide data

    // Output intent
    if (inDoc.getOutputIntent() != null)
        outDoc.setOutputIntent(IccBasedColorSpace.copy(outDoc, inDoc.getOutputIntent()));

    // Metadata
    outDoc.setMetadata(Metadata.copy(outDoc, inDoc.getMetadata()));

    // Viewer settings
    outDoc.setViewerSettings(ViewerSettings.copy(outDoc, inDoc.getViewerSettings()));

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.getAssociatedFiles();
    for (FileReference inFileRef : inDoc.getAssociatedFiles())
        outAssociatedFiles.add(FileReference.copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.getPlainEmbeddedFiles();
    for (FileReference inFileRef : inDoc.getPlainEmbeddedFiles())
        outEmbeddedFiles.add(FileReference.copy(outDoc, inFileRef));
}

private static void addImage(Document document, Page outPage, String imagePath, double x, double y)
        throws PdfToolboxException, IOException {
    try (// Create content generator
        ContentGenerator generator = new ContentGenerator(outPage.getContent(), false);
        // Load image from input path
        FileStream inImage = new FileStream(imagePath, FileStream.Mode.READ_ONLY)) {
        // Create image object
        Image image = Image.create(document, inImage);

        double resolution = 150;

        // Calculate rectangle for image
        Size size = image.getSize();
        Rectangle rect = new Rectangle(x, y, x + size.getWidth() * 72 / resolution,
                y + size.getHeight() * 72 / resolution);

        // Paint image into the specified rectangle
        generator.paintImage(image, rect);
    }
}

// Open input document
pInStream = _tfopen(szInPath, _T("rb"));
GOTO_CLEANUP_IF_NULL(pInStream, _T("Failed to open input file \"%s\".\n"), szInPath);
PtxSysCreateFILEStreamDescriptor(&descriptor, pInStream, 0);
pInDoc = PtxPdf_Document_Open(&descriptor, _T(""));
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInDoc, _T("Input file \"%s\" cannot cannot be opened. %s (ErrorCode: 0x%08x).\n"), szInPath, szErrorBuff, Ptx_GetLastError());

// Create output document
pOutStream = _tfopen(szOutPath, _T("wb+"));
GOTO_CLEANUP_IF_NULL(pOutStream, _T("Failed to open output file \"%s\".\n"), szOutPath);
PtxSysCreateFILEStreamDescriptor(&outDescriptor, pOutStream, 0);
iConformance = PtxPdf_Document_GetConformance(pInDoc);
pOutDoc = PtxPdf_Document_Create(&outDescriptor, &iConformance, NULL);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutDoc, _T("Output file \"%s\" cannot be created. %s (ErrorCode: 0x%08x).\n"), szOutPath, szErrorBuff, Ptx_GetLastError());

// Copy document-wide data
GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(copyDocumentData(pInDoc, pOutDoc), _T("Failed to copy document-wide data. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Configure copy options
pCopyOptions = PtxPdf_PageCopyOptions_New();

// Get input and output page lists
pInPageList = PtxPdf_Document_GetPages(pInDoc);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInPageList, _T("Failed to get the pages of the input document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
pOutPageList = PtxPdf_Document_GetPages(pOutDoc);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutPageList, _T("Failed to get the pages of the output document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Copy pages preceding selected page
pInPageRange = PtxPdf_PageList_GetRange(pInPageList, 0, iPageNumber - 1);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInPageRange, _T("Failed to get page range. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
pOutPageRange = PtxPdf_PageList_Copy(pOutDoc, pInPageRange, pCopyOptions);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutPageRange, _T("Failed to copy page range. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdf_PageList_AddRange(pOutPageList, pOutPageRange), _T("Failed to add page range. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
Ptx_Release(pInPageRange);
pInPageRange = NULL;
Ptx_Release(pOutPageRange);
pOutPageRange = NULL;

// Copy selected page an add image
pInPage = PtxPdf_PageList_Get(pInPageList, iPageNumber - 1);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInPage, _T("Failed to get page. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
pOutPage = PtxPdf_Page_Copy(pOutDoc, pInPage, pCopyOptions);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutPage, _T("Failed to copy page. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
if (addImage(pOutDoc, pOutPage, szImagePath, 150.0, 150.0) != 0)
    goto cleanup;
GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdf_PageList_Add(pOutPageList, pOutPage), _T("Failed to add page. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Copy remaining pages
pInPageRange = PtxPdf_PageList_GetRange(pInPageList, 1, PtxPdf_PageList_GetCount(pInPageList) - 1);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInPageRange, _T("Failed to get page range from input document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
pOutPageRange = PtxPdf_PageList_Copy(pOutDoc, pInPageRange, pCopyOptions);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutPageRange, _T("Failed to copy page range to output document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdf_PageList_AddRange(pOutPageList, pOutPageRange), _T("Failed to add page range to output page list. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

int copyDocumentData(TPtxPdf_Document * pInDoc, TPtxPdf_Document * pOutDoc)
{
    TPtxPdf_FileReferenceList* pInFileRefList;
    TPtxPdf_FileReferenceList* pOutFileRefList;

    // Output intent
    if (PtxPdf_Document_GetOutputIntent(pInDoc) != NULL)
        if (PtxPdf_Document_SetOutputIntent(pOutDoc, PtxPdfContent_IccBasedColorSpace_Copy(pOutDoc, PtxPdf_Document_GetOutputIntent(pInDoc))) == FALSE)
            return FALSE;

    // Metadata
    if (PtxPdf_Document_SetMetadata(pOutDoc, PtxPdf_Metadata_Copy(pOutDoc, PtxPdf_Document_GetMetadata(pInDoc))) == FALSE)
        return FALSE;

    // Viewer settings
    if (PtxPdf_Document_SetViewerSettings(pOutDoc, PtxPdfNav_ViewerSettings_Copy(pOutDoc, PtxPdf_Document_GetViewerSettings(pInDoc))) == FALSE)
        return FALSE;

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    pInFileRefList = PtxPdf_Document_GetAssociatedFiles(pInDoc);
    pOutFileRefList = PtxPdf_Document_GetAssociatedFiles(pOutDoc);
    if (pInFileRefList == NULL || pOutFileRefList == NULL)
        return FALSE;
    for (int iFileRef = 0; iFileRef < PtxPdf_FileReferenceList_GetCount(pInFileRefList); iFileRef++)
        if (PtxPdf_FileReferenceList_Add(pOutFileRefList, PtxPdf_FileReference_Copy(pOutDoc, PtxPdf_FileReferenceList_Get(pInFileRefList, iFileRef))) == FALSE)
            return FALSE;

    // Plain embedded files
    pInFileRefList = PtxPdf_Document_GetPlainEmbeddedFiles(pInDoc);
    pOutFileRefList = PtxPdf_Document_GetPlainEmbeddedFiles(pOutDoc);
    if (pInFileRefList == NULL || pOutFileRefList == NULL)
        return FALSE;
    for (int iFileRef = 0; iFileRef < PtxPdf_FileReferenceList_GetCount(pInFileRefList); iFileRef++)
        if (PtxPdf_FileReferenceList_Add(pOutFileRefList, PtxPdf_FileReference_Copy(pOutDoc, PtxPdf_FileReferenceList_Get(pInFileRefList, iFileRef))) == FALSE)
            return FALSE;

    return TRUE;
}

int addImage(TPtxPdf_Document* pOutDoc, TPtxPdf_Page* pOutPage, TCHAR* szImagePath, double x, double y)
{
    TPtxPdfContent_Content* pContent = NULL;
    TPtxPdfContent_ContentGenerator* pGenerator = NULL;
    TPtxSys_StreamDescriptor imageDescriptor;
    FILE* pImageStream = NULL;
    TPtxPdfContent_Image* pImage = NULL;

    pContent = PtxPdf_Page_GetContent(pOutPage);

    // Create content generator
    pGenerator = PtxPdfContent_ContentGenerator_New(pContent, FALSE);

    // Load image from input path
    pImageStream = _tfopen(szImagePath, _T("rb"));
    PtxSysCreateFILEStreamDescriptor(&imageDescriptor, pImageStream, 0);

    // Create image object
    pImage = PtxPdfContent_Image_Create(pOutDoc, &imageDescriptor);

    double dResolution = 150.0;

    TPtxGeomInt_Size size;
    GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdfContent_Image_GetSize(pImage, &size), _T("Failed to get image size. %s(ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

    // Calculate Rectangle for data matrix
    TPtxGeomReal_Rectangle rect;
    rect.dLeft = x;
    rect.dBottom = y;
    rect.dRight = x + (double)size.iWidth * 72.0 / dResolution;
    rect.dTop = y + (double)size.iHeight * 72.0 / dResolution;

    // Paint image into the specified rectangle
    GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdfContent_ContentGenerator_PaintImage(pGenerator, pImage, &rect), _T("Failed to paint image. %s(ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

cleanup:
    if (pGenerator != NULL)
        PtxPdfContent_ContentGenerator_Close(pGenerator);
    if (pContent != NULL)
        Ptx_Release(pContent);

    return iReturnValue;
}

// Open input document
using (Stream inStream = new FileStream(inPath, FileMode.Open, FileAccess.Read))
using (Document inDoc = Document.Open(inStream, null))

// Create output document
using (Stream outStream = new FileStream(outPath, FileMode.Create, FileAccess.ReadWrite))
using (Document outDoc = Document.Create(outStream, inDoc.Conformance, null))
{
    // Copy document-wide data
    CopyDocumentData(inDoc, outDoc);

    // Get the device color space
    ColorSpace colorSpace = ColorSpace.CreateProcessColorSpace(outDoc, ProcessColorSpaceType.Rgb);

    // Create paint object
    paint = Paint.Create(outDoc, colorSpace, new double[] { 1.0, 0.0, 0.0 }, null);

    // Define page copy options
    PageCopyOptions copyOptions = new PageCopyOptions();

    // Copy first page, add image mask, and append to output document
    Page outPage = Page.Copy(outDoc, inDoc.Pages[0], copyOptions);
    AddImageMask(outDoc, outPage, imageMaskPath, 250, 150);
    outDoc.Pages.Add(outPage);

    // Copy remaining pages and append to output document
    PageList inPageRange = inDoc.Pages.GetRange(1, inDoc.Pages.Count - 1);
    PageList copiedPages = PageList.Copy(outDoc, inPageRange, copyOptions);
    outDoc.Pages.AddRange(copiedPages);
}

private static void CopyDocumentData(Document inDoc, Document outDoc)
{
    // Copy document-wide data

    // Output intent
    if (inDoc.OutputIntent != null)
        outDoc.OutputIntent = IccBasedColorSpace.Copy(outDoc, inDoc.OutputIntent);

    // Metadata
    outDoc.Metadata = Metadata.Copy(outDoc, inDoc.Metadata);

    // Viewer settings
    outDoc.ViewerSettings = ViewerSettings.Copy(outDoc, inDoc.ViewerSettings);

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.AssociatedFiles;
    foreach (FileReference inFileRef in inDoc.AssociatedFiles)
        outAssociatedFiles.Add(FileReference.Copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.PlainEmbeddedFiles;
    foreach (FileReference inFileRef in inDoc.PlainEmbeddedFiles)
        outEmbeddedFiles.Add(FileReference.Copy(outDoc, inFileRef));
}

    private static void AddImageMask(Document document, Page outPage, string imagePath, 
        double x, double y)
    {
        // Create content generator 
        using ContentGenerator generator = new ContentGenerator(outPage.Content, false);

        // Load image from input path
        using Stream inImage = new FileStream(imagePath, FileMode.Open, FileAccess.Read);

        // Create image mask object
        ImageMask imageMask = ImageMask.Create(document, inImage);
        double resolution = 150;

        // Calculate rectangle for image 
        PdfTools.FourHeights.PdfToolbox.Geometry.Integer.Size size = imageMask.Size;
        Rectangle rect = new Rectangle
        {
            Left = x,
            Bottom = y,
            Right = x + size.Width * 72 / resolution,
            Top = y + size.Height * 72 / resolution
        };

        // Paint image mask into the specified rectangle
        generator.PaintImageMask(imageMask, rect, paint);
    }
}

try (// Open input document
    FileStream inStream = new FileStream(inPath, FileStream.Mode.READ_ONLY);
    Document inDoc = Document.open(inStream, null);
    FileStream outStream = new FileStream(outPath, FileStream.Mode.READ_WRITE_NEW)) {
    try (// Create output document
        Document outDoc = Document.create(outStream, inDoc.getConformance(), null)) {

        // Copy document-wide data
        copyDocumentData(inDoc, outDoc);

        // Define page copy options
        PageCopyOptions copyOptions = new PageCopyOptions();

        // Get the device color space
        ColorSpace colorSpace = ColorSpace.createProcessColorSpace(outDoc, ProcessColorSpaceType.RGB);

        // Create paint object
        paint = Paint.create(outDoc, colorSpace, new double[] { 1.0, 0.0, 0.0 }, null);

        // Copy first page, add image mask, and append to output document
        Page outPage = Page.copy(outDoc, inDoc.getPages().get(0), copyOptions);
        addImageMask(outDoc, outPage, imageMaskPath, 250, 150);
        outDoc.getPages().add(outPage);

        // Copy remaining pages and append to output document
        PageList inPageRange = inDoc.getPages().subList(1, inDoc.getPages().size());
        PageList copiedPages = PageList.copy(outDoc, inPageRange, copyOptions);
        outDoc.getPages().addAll(copiedPages);
    }
}

private static void copyDocumentData(Document inDoc, Document outDoc) throws PdfToolboxException, IOException {
    // Copy document-wide data

    // Output intent
    if (inDoc.getOutputIntent() != null)
        outDoc.setOutputIntent(IccBasedColorSpace.copy(outDoc, inDoc.getOutputIntent()));

    // Metadata
    outDoc.setMetadata(Metadata.copy(outDoc, inDoc.getMetadata()));

    // Viewer settings
    outDoc.setViewerSettings(ViewerSettings.copy(outDoc, inDoc.getViewerSettings()));

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.getAssociatedFiles();
    for (FileReference inFileRef : inDoc.getAssociatedFiles())
        outAssociatedFiles.add(FileReference.copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.getPlainEmbeddedFiles();
    for (FileReference inFileRef : inDoc.getPlainEmbeddedFiles())
        outEmbeddedFiles.add(FileReference.copy(outDoc, inFileRef));
}

private static void addImageMask(Document document, Page outPage, String imagePath, double x, double y)
        throws PdfToolboxException, IOException {
    try (// Create content generator
        ContentGenerator generator = new ContentGenerator(outPage.getContent(), false);
        // Load image from input path
        FileStream inImage = new FileStream(imagePath, FileStream.Mode.READ_ONLY)) {
        // Create image mask object
        ImageMask imageMask = ImageMask.create(document, inImage);

        double resolution = 150;

        // Calculate rectangle for image
        Size size = imageMask.getSize();
        Rectangle rect = new Rectangle(x, y, x + size.getWidth() * 72 / resolution,
                y + size.getHeight() * 72 / resolution);

        // Paint image mask into the specified rectangle
        generator.paintImageMask(imageMask, rect, paint);
    }
}

// Open input document
pInStream = _tfopen(szInPath, _T("rb"));
GOTO_CLEANUP_IF_NULL(pInStream, _T("Failed to open input file \"%s\".\n"), szInPath);
PtxSysCreateFILEStreamDescriptor(&descriptor, pInStream, 0);
pInDoc = PtxPdf_Document_Open(&descriptor, _T(""));
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(_T("Input file \"%s\" cannot be opened. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Create output document
pOutStream = _tfopen(szOutPath, _T("wb+"));
GOTO_CLEANUP_IF_NULL(pOutStream, _T("Failed to open output file \"%s\".\n"), szOutPath);
PtxSysCreateFILEStreamDescriptor(&outDescriptor, pOutStream, 0);
iConformance = PtxPdf_Document_GetConformance(pInDoc);
pOutDoc = PtxPdf_Document_Create(&outDescriptor, &iConformance, NULL);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(_T("Output file \"%s\" cannot be created. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Copy document-wide data
GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(copyDocumentData(pInDoc, pOutDoc), _T("Failed to copy document-wide data. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Get the device color space
TPtxPdfContent_ColorSpace* pColorSpace = PtxPdfContent_ColorSpace_CreateProcessColorSpace(pOutDoc, ePtxPdfContent_ProcessColorSpaceType_Rgb);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pColorSpace, _T("Failed to get the device color space. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Chose the RGB color value
double color[] = { 1.0, 0.0, 0.0 };
size_t nColor = sizeof(color) / sizeof(double);

// Create paint object
pPaint = PtxPdfContent_Paint_Create(pOutDoc, pColorSpace, color, nColor, NULL);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pPaint, _T("Failed to create a transparent paint. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Configure copy options
pCopyOptions = PtxPdf_PageCopyOptions_New();

// Get input and output page lists
pInPageList = PtxPdf_Document_GetPages(pInDoc);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInPageList, _T("Failed to get the pages of the input document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
pOutPageList = PtxPdf_Document_GetPages(pOutDoc);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutPageList, _T("Failed to get the pages of the output document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Copy first page an add image mask
pInPage = PtxPdf_PageList_Get(pInPageList, 0);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInPage, _T("Failed to get page. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
pOutPage = PtxPdf_Page_Copy(pOutDoc, pInPage, pCopyOptions);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutPage, _T("Failed to copy page. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
if (addImageMask(pOutDoc, pOutPage, szImageMaskPath, 250, 150) != 0)
    goto cleanup;
GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdf_PageList_Add(pOutPageList, pOutPage), _T("Failed to add page. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Copy remaining pages
pInPageRange = PtxPdf_PageList_GetRange(pInPageList, 1, PtxPdf_PageList_GetCount(pInPageList) - 1);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInPageRange, _T("Failed to get page range from input document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
pOutPageRange = PtxPdf_PageList_Copy(pOutDoc, pInPageRange, pCopyOptions);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutPageRange, _T("Failed to copy page range to output document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdf_PageList_AddRange(pOutPageList, pOutPageRange), _T("Failed to add page range to output page list. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

int copyDocumentData(TPtxPdf_Document * pInDoc, TPtxPdf_Document * pOutDoc)
{
    TPtxPdf_FileReferenceList* pInFileRefList;
    TPtxPdf_FileReferenceList* pOutFileRefList;

    // Output intent
    if (PtxPdf_Document_GetOutputIntent(pInDoc) != NULL)
        if (PtxPdf_Document_SetOutputIntent(pOutDoc, PtxPdfContent_IccBasedColorSpace_Copy(pOutDoc, PtxPdf_Document_GetOutputIntent(pInDoc))) == FALSE)
            return FALSE;

    // Metadata
    if (PtxPdf_Document_SetMetadata(pOutDoc, PtxPdf_Metadata_Copy(pOutDoc, PtxPdf_Document_GetMetadata(pInDoc))) == FALSE)
        return FALSE;

    // Viewer settings
    if (PtxPdf_Document_SetViewerSettings(pOutDoc, PtxPdfNav_ViewerSettings_Copy(pOutDoc, PtxPdf_Document_GetViewerSettings(pInDoc))) == FALSE)
        return FALSE;

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    pInFileRefList = PtxPdf_Document_GetAssociatedFiles(pInDoc);
    pOutFileRefList = PtxPdf_Document_GetAssociatedFiles(pOutDoc);
    if (pInFileRefList == NULL || pOutFileRefList == NULL)
        return FALSE;
    for (int iFileRef = 0; iFileRef < PtxPdf_FileReferenceList_GetCount(pInFileRefList); iFileRef++)
        if (PtxPdf_FileReferenceList_Add(pOutFileRefList, PtxPdf_FileReference_Copy(pOutDoc, PtxPdf_FileReferenceList_Get(pInFileRefList, iFileRef))) == FALSE)
            return FALSE;

    // Plain embedded files
    pInFileRefList = PtxPdf_Document_GetPlainEmbeddedFiles(pInDoc);
    pOutFileRefList = PtxPdf_Document_GetPlainEmbeddedFiles(pOutDoc);
    if (pInFileRefList == NULL || pOutFileRefList == NULL)
        return FALSE;
    for (int iFileRef = 0; iFileRef < PtxPdf_FileReferenceList_GetCount(pInFileRefList); iFileRef++)
        if (PtxPdf_FileReferenceList_Add(pOutFileRefList, PtxPdf_FileReference_Copy(pOutDoc, PtxPdf_FileReferenceList_Get(pInFileRefList, iFileRef))) == FALSE)
            return FALSE;

    return TRUE;
}

int addImageMask(TPtxPdf_Document* pOutDoc, TPtxPdf_Page* pOutPage, TCHAR* szImageMaskPath, double x, double y)
{
    TPtxPdfContent_Content* pContent = NULL;
    TPtxPdfContent_ContentGenerator* pGenerator = NULL;
    FILE* pImageStream = NULL;
    TPtxSys_StreamDescriptor imageDescriptor;
    TPtxPdfContent_ImageMask* pImageMask = NULL;

    pContent = PtxPdf_Page_GetContent(pOutPage);

    // Create content generator
    pGenerator = PtxPdfContent_ContentGenerator_New(pContent, FALSE);
    GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pGenerator, _T("Failed to create a content generator. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

    // Load image from input path
    pImageStream = _tfopen(szImageMaskPath, _T("rb"));
    GOTO_CLEANUP_IF_NULL(pImageStream, _T("Failed to open image mask file \"%s\".\n"), szImageMaskPath);
    PtxSysCreateFILEStreamDescriptor(&imageDescriptor, pImageStream, 0);

    // Create image mask object
    pImageMask = PtxPdfContent_ImageMask_Create(pOutDoc, &imageDescriptor);
    GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pImageMask, _T("Failed to create image mask obejct. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

    double dResolution = 150.0;
    TPtxGeomInt_Size size;
    GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdfContent_ImageMask_GetSize(pImageMask, &size), _T("Failed to get image mask size. %s(ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

    // Calculate Rectangle for data matrix
    TPtxGeomReal_Rectangle rect;
    rect.dLeft = x;
    rect.dBottom = y;
    rect.dRight = x + (double)size.iWidth * 72.0 / dResolution;
    rect.dTop = y + (double)size.iHeight * 72.0 / dResolution;

    // Paint image mask into the specified rectangle
    GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdfContent_ContentGenerator_PaintImageMask(pGenerator, pImageMask, &rect, pPaint), _T("Failed to paint image mask. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

cleanup:
    if (pGenerator != NULL)
        PtxPdfContent_ContentGenerator_Close(pGenerator);
    if (pContent != NULL)
        Ptx_Release(pContent);

    return iReturnValue;
}

        // Open input document
        using Stream inStream = new FileStream(inPath, FileMode.Open, FileAccess.Read);
        using Document inDoc = Document.Open(inStream, null);

        // Create output document
        using Stream outStream = new FileStream(outPath, FileMode.Create, FileAccess.ReadWrite);
        using Document outDoc = Document.Create(outStream, inDoc.Conformance, null);
        // Copy document-wide data
        CopyDocumentData(inDoc, outDoc);

        // Create a font for the line numbers
        var lineNumberFont = Font.CreateFromSystem(outDoc, "Arial", null, true);

        // Define page copy options
        PageCopyOptions pageCopyOptions = new();

        // Copy all pages from input to output document
        var inPages = inDoc.Pages;
        var outPages = PageList.Copy(outDoc, inPages, pageCopyOptions);

        // Iterate over all input-output page pairs
        var pages = inPages.Zip(outPages);
        foreach (var pair in pages)
            AddLineNumbers(outDoc, lineNumberFont, pair);

        // Add the finished pages to the output document's page list
        outDoc.Pages.AddRange(outPages);
    }
    catch (Exception ex)
    {
        Console.WriteLine(ex.Message);
    }
}

private static void AddLineNumbers(Document outDoc, Font lineNumberFont, (Page first, Page second) pair)
{
    // Add line numbers to all text found in the input page to the output page

    // The input and output page
    var inPage = pair.first;
    var outPage = pair.second;

    // Extract all text fragments
    var extractor = new ContentExtractor(inPage.Content)
    {
        Ungrouping = UngroupingSelection.All
    };

    // The left-most horizontel position of all text fragments
    double leftX = inPage.Size.Width;

    // A comparison for doubles that considers distances smaller than the font size as equal
    var comparison = new Comparison(
        (a, b) =>
        {
            var d = b - a;
            if (Math.Abs(d) < fontSize)
                return 0;
            return Math.Sign(d);
        });

    // A container to hold the vertical positions of all text fragments, sorted and without duplicates
    SortedSet lineYPositions = new(Comparer.Create(comparison));

    // Iterate over all content elements of the input page
    foreach (var element in extractor)
    {
        // Process only text elements
        if (element is TextElement textElement)
        {
            // Iterate over all text fragments
            foreach (var fragment in textElement.Text)
            {
                // Get the fragments base line starting point
                var point = fragment.Transform.TransformPoint(new Point { X = fragment.BoundingBox.Left, Y = 0 });

                // Update the left-most position
                leftX = Math.Min(leftX, point.X);

                // Add the vertical position
                lineYPositions.Add(point.Y);
            }
        }
    }

    // If at least text fragment was found: add line numbers
    if (lineYPositions.Count > 0)
    {
        // Create a text object and use a text generator
        var text = Text.Create(outDoc);
        using (var textGenerator = new TextGenerator(text, lineNumberFont, fontSize, null))
        {
            // Iterate over all vertical positions found in the input
            foreach (var y in lineYPositions)
            {
                // The line number string
                var lineNumberString = string.Format("{0}", ++lineNumber);

                // The width of the line number string when shown on the page
                var width = textGenerator.GetWidth(lineNumberString);

                // Position line numbers right aligned
                // with a given distance to the right-most horizontal position
                // and at the vertical position of the current text fragment
                textGenerator.MoveTo(new Point { X = leftX - width - distance, Y = y });

                // Show the line number string
                textGenerator.Show(lineNumberString);
            }
        }

        // Use a content generator to paint the text onto the page
        using var contentGenerator = new ContentGenerator(outPage.Content, false);
        contentGenerator.PaintText(text);
    }
}

private static void CopyDocumentData(Document inDoc, Document outDoc)
{
    // Copy document-wide data

    // Output intent
    if (inDoc.OutputIntent != null)
        outDoc.OutputIntent = IccBasedColorSpace.Copy(outDoc, inDoc.OutputIntent);

    // Metadata
    outDoc.Metadata = Metadata.Copy(outDoc, inDoc.Metadata);

    // Viewer settings
    outDoc.ViewerSettings = ViewerSettings.Copy(outDoc, inDoc.ViewerSettings);

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.AssociatedFiles;
    foreach (FileReference inFileRef in inDoc.AssociatedFiles)
        outAssociatedFiles.Add(FileReference.Copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.PlainEmbeddedFiles;
    foreach (FileReference inFileRef in inDoc.PlainEmbeddedFiles)
        outEmbeddedFiles.Add(FileReference.Copy(outDoc, inFileRef));
}

try (// Open input document
    FileStream inStream = new FileStream(inPath, FileStream.Mode.READ_ONLY);
    Document inDoc = Document.open(inStream, null);
    FileStream outStream = new FileStream(outPath, FileStream.Mode.READ_WRITE_NEW)) {
    try (Document outDoc = Document.create(outStream, inDoc.getConformance(), null)) {
        // Copy document-wide data
        copyDocumentData(inDoc, outDoc);

        // Create embedded font in output document
        Font font = Font.createFromSystem(outDoc, "Arial", null, true);

        // Define page copy options
        PageCopyOptions copyOptions = new PageCopyOptions();

        // Copy all pages from input to output document
        PageList inPages = inDoc.getPages();
        PageList outPages = PageList.copy(outDoc, inPages, copyOptions);

        // Iterate over all input-output page pairs and add line numbers
        for (int i = 0; i < inPages.size(); ++i) {
            addLineNumbers(outDoc, font, new SimpleEntry<>(inPages.get(i), outPages.get(i)));
        }

        // Add the finished pages to the output document's page list
        outDoc.getPages().addAll(outPages);
    }
}

private static void addLineNumbers(Document outDoc, Font lineNumberFont, Entry pair) throws IOException, PdfToolboxException {
    // Add line numbers to all text found in the input page to the output page

    // The input and output page
    Page inPage = pair.getKey();
    Page outPage = pair.getValue();

    // Extract all text fragments
    ContentExtractor extractor = new ContentExtractor(inPage.getContent());
    extractor.setUngrouping(UngroupingSelection.ALL);
    // The left-most horizontal position of all text fragments
    double leftX = inPage.getSize().getWidth();

    Comparator comparator = new Comparator() {
        @Override
        public int compare(Double d1, Double d2) {
            Double diff = d2 - d1;
            if (Math.abs(diff) < fontSize)
                return 0;
            return (int) Math.signum(diff);
        }
    };

    SortedSet lineYPositions = new TreeSet<>(comparator);

    for (ContentElement element : extractor) {

        // Process only text elements
        if (element instanceof TextElement) {
            TextElement textElement = (TextElement) element;
            // Iterate over all text fragments
            for (TextFragment fragment : textElement.getText()) {

                // Get the fragments base line starting point
                Point point = fragment.getTransform().transformPoint(new Point(fragment.getBoundingBox().left, 0));

                // Update the left-most position
                leftX = Math.min(leftX, point.x);

                // Add the vertical position
                lineYPositions.add(point.y);
            }
        }
    }

    // If at least one text fragment was found: add line numbers
    if (lineYPositions.size() > 0) {

        // Create a text object and use a text generator
        Text text = Text.create(outDoc);
        try (TextGenerator textGenerator = new TextGenerator(text, lineNumberFont, fontSize, null)) {
            // Iterate over all vertical positions found in the input
            for(double y : lineYPositions) {
                // The line number string
                String lineNumberString = String.valueOf(++lineNumber);

                // The width of the line number string when shown on the page
                double width = textGenerator.getWidth(lineNumberString);

                // Position line numbers right aligned
                // with a given distance to the right-most horizontal position
                // and at the vertical position of the current text fragment
                textGenerator.moveTo(new Point (leftX - width - distance, y));

                // Show the line number string
                textGenerator.show(lineNumberString);
            }
        }
        try (ContentGenerator contentGenerator = new ContentGenerator(outPage.getContent(), false)) {
            // Use a content generator to paint the text onto the page
            contentGenerator.paintText(text);
        }
    }
}

private static void copyDocumentData(Document inDoc, Document outDoc) throws PdfToolboxException, IOException {
    // Copy document-wide data

    // Output intent
    if (inDoc.getOutputIntent() != null)
        outDoc.setOutputIntent(IccBasedColorSpace.copy(outDoc, inDoc.getOutputIntent()));

    // Metadata
    outDoc.setMetadata(Metadata.copy(outDoc, inDoc.getMetadata()));

    // Viewer settings
    outDoc.setViewerSettings(ViewerSettings.copy(outDoc, inDoc.getViewerSettings()));

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.getAssociatedFiles();
    for (FileReference inFileRef : inDoc.getAssociatedFiles())
        outAssociatedFiles.add(FileReference.copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.getPlainEmbeddedFiles();
    for (FileReference inFileRef : inDoc.getPlainEmbeddedFiles())
        outEmbeddedFiles.add(FileReference.copy(outDoc, inFileRef));
}

// Open input document
using (Stream inStream = new FileStream(inPath, FileMode.Open, FileAccess.Read))
using (Document inDoc = Document.Open(inStream, null))

// Create output document
using (Stream outStream = new FileStream(outPath, FileMode.Create, FileAccess.ReadWrite))
using (Document outDoc = Document.Create(outStream, inDoc.Conformance, null))
{
    // Copy document-wide data
    CopyDocumentData(inDoc, outDoc);

    font = Font.CreateFromSystem(outDoc, "Arial", "Italic", true);

    // Get the color space
    ColorSpace colorSpace = ColorSpace.CreateProcessColorSpace(outDoc, ProcessColorSpaceType.Rgb);

    // Choose the RGB color value
    double[] color = { 1.0, 0.0, 0.0 };
    Transparency transparency = new Transparency(alpha);

    // Create paint object with the choosen RGB color
    paint = Paint.Create(outDoc, colorSpace, color, transparency);

    // Define copy options
    PageCopyOptions copyOptions = new PageCopyOptions();

    // Copy all pages from input document
    foreach (Page inPage in inDoc.Pages)
    {
        // Copy page from input to output
        Page outPage = Page.Copy(outDoc, inPage, copyOptions);

        // Add text to page
        AddStamp(outDoc, outPage, stampString);

        // Add page to document
        outDoc.Pages.Add(outPage);
    }
}

private static void CopyDocumentData(Document inDoc, Document outDoc)
{
    // Copy document-wide data

    // Output intent
    if (inDoc.OutputIntent != null)
        outDoc.OutputIntent = IccBasedColorSpace.Copy(outDoc, inDoc.OutputIntent);

    // Metadata
    outDoc.Metadata = Metadata.Copy(outDoc, inDoc.Metadata);

    // Viewer settings
    outDoc.ViewerSettings = ViewerSettings.Copy(outDoc, inDoc.ViewerSettings);

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.AssociatedFiles;
    foreach (FileReference inFileRef in inDoc.AssociatedFiles)
        outAssociatedFiles.Add(FileReference.Copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.PlainEmbeddedFiles;
    foreach (FileReference inFileRef in inDoc.PlainEmbeddedFiles)
        outEmbeddedFiles.Add(FileReference.Copy(outDoc, inFileRef));
}

private static void AddStamp(Document outputDoc, Page outPage, string stampString)
{
    // Create content generator and text object
    using ContentGenerator gen = new ContentGenerator(outPage.Content, false);
    Text text = Text.Create(outputDoc);

    // Create text generator
    using (TextGenerator textgenerator = new TextGenerator(text, font, fontSize, null))
    {
        // Calculate point and angle of rotation
        Point rotationCenter = new Point
        {
            X = outPage.Size.Width / 2.0,
            Y = outPage.Size.Height / 2.0
        };
        double rotationAngle = Math.Atan2(outPage.Size.Height,
            outPage.Size.Width) / Math.PI * 180.0;

        // Rotate textinput around the calculated position
        AffineTransform trans = AffineTransform.Identity;
        trans.Rotate(rotationAngle, rotationCenter);
        gen.Transform(trans);

        // Calculate position
        Point position = new Point
        {
            X = (outPage.Size.Width - textgenerator.GetWidth(stampString)) / 2.0,
            Y = (outPage.Size.Height - font.Ascent * fontSize) / 2.0
        };

        // Move to position
        textgenerator.MoveTo(position);

        // Set text paint
        textgenerator.Fill = paint;

        // Add given stamp string
        textgenerator.ShowLine(stampString);
    }
    // Paint the positioned text
    gen.PaintText(text);
}

try (// Open input document
    FileStream inStream = new FileStream(inPath, FileStream.Mode.READ_ONLY);
    Document inDoc = Document.open(inStream, null);
    FileStream outStream = new FileStream(outPath, FileStream.Mode.READ_WRITE_NEW)) {
    try (// Create output document
        Document outDoc = Document.create(outStream, inDoc.getConformance(), null)) {
        // Copy document-wide data
        copyDocumentData(inDoc, outDoc);

        // Create embedded font in output document
        font = Font.createFromSystem(outDoc, "Arial", "Italic", true);

        // Get the color space
        ColorSpace colorSpace = ColorSpace.createProcessColorSpace(outDoc, ProcessColorSpaceType.RGB);

        // Choose the RGB color value
        double[] color = { 1.0, 0.0, 0.0 };
        Transparency transparency = new Transparency(alpha);

        // Create paint object
        paint = Paint.create(outDoc, colorSpace, color, transparency);

        // Define page copy options
        PageCopyOptions copyOptions = new PageCopyOptions();

        // Loop throw all pages of input
        for (Page inPage : inDoc.getPages()) {
            // Copy page from input to output
            Page outPage = Page.copy(outDoc, inPage, copyOptions);

            // Add text to page
            addStamp(outDoc, outPage, stampString);

            // Add page to document
            outDoc.getPages().add(outPage);
        }
    }
}

private static void copyDocumentData(Document inDoc, Document outDoc) throws PdfToolboxException, IOException {
    // Copy document-wide data

    // Output intent
    if (inDoc.getOutputIntent() != null)
        outDoc.setOutputIntent(IccBasedColorSpace.copy(outDoc, inDoc.getOutputIntent()));

    // Metadata
    outDoc.setMetadata(Metadata.copy(outDoc, inDoc.getMetadata()));

    // Viewer settings
    outDoc.setViewerSettings(ViewerSettings.copy(outDoc, inDoc.getViewerSettings()));

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.getAssociatedFiles();
    for (FileReference inFileRef : inDoc.getAssociatedFiles())
        outAssociatedFiles.add(FileReference.copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.getPlainEmbeddedFiles();
    for (FileReference inFileRef : inDoc.getPlainEmbeddedFiles())
        outEmbeddedFiles.add(FileReference.copy(outDoc, inFileRef));
}

private static void addStamp(Document outputDoc, Page outPage, String stampString)
        throws PdfToolboxException, IOException {
    try (// Create content generator
        ContentGenerator generator = new ContentGenerator(outPage.getContent(), false)) {
        // Create text object
        Text text = Text.create(outputDoc);
        try (// Create text generator
            TextGenerator textgenerator = new TextGenerator(text, font, fontSize, null)) {
            // Calculate point and angle of rotation
            Point rotationCenter = new Point(outPage.getSize().width / 2.0, outPage.getSize().height / 2.0);

            // Calculate rotation angle
            double rotationAngle = Math.atan2(outPage.getSize().height, outPage.getSize().width) / Math.PI * 180.0;

            // Rotate text input around the calculated position
            AffineTransform trans = AffineTransform.getIdentity();
            trans.rotate(rotationAngle, rotationCenter);
            generator.transform(trans);

            // Calculate position
            Point position = new Point((outPage.getSize().width - textgenerator.getWidth(stampString)) / 2.0,
                    (outPage.getSize().height - font.getAscent() * fontSize) / 2.0);

            // Move to position
            textgenerator.moveTo(position);

            // Set text paint
            textgenerator.setFill(paint);

            // Add given stamp string
            textgenerator.showLine(stampString);
        }

        // Paint the positioned text
        generator.paintText(text);
    }
}

// Open input document
pInStream = _tfopen(szInPath, _T("rb"));
GOTO_CLEANUP_IF_NULL(pInStream, _T("Failed to open input file \"%s\".\n"), szInPath);
PtxSysCreateFILEStreamDescriptor(&inDescriptor, pInStream, FALSE);
pInDoc = PtxPdf_Document_Open(&inDescriptor, _T(""));
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInDoc, _T("Input file \"%s\" cannot be opened. %s (ErrorCode: 0x%08x).\n"), szInPath, szErrorBuff, Ptx_GetLastError());

// Create output document
pOutStream = _tfopen(szOutPath, _T("wb+"));
GOTO_CLEANUP_IF_NULL(pOutStream, _T("Failed to open output file %s.\n"), szOutPath);
PtxSysCreateFILEStreamDescriptor(&outDescriptor, pOutStream, 0);
iConformance = PtxPdf_Document_GetConformance(pInDoc);
pOutDoc = PtxPdf_Document_Create(&outDescriptor, &iConformance, NULL);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutDoc, _T("Output file %s cannot be closed. %s (ErrorCode: 0x%08x).\n"), szOutPath, szErrorBuff, Ptx_GetLastError());

// Create embedded font in output document
pFont = PtxPdfContent_Font_CreateFromSystem(pOutDoc, _T("Arial"), _T("Italic"), TRUE);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pFont, _T("Embedded font cannot be created. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Copy document-wide data
GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(copyDocumentData(pInDoc, pOutDoc), _T("Failed to copy document-wide data. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Get the color space
TPtxPdfContent_ColorSpace* pColorSpace = PtxPdfContent_ColorSpace_CreateProcessColorSpace(pOutDoc, ePtxPdfContent_ProcessColorSpaceType_Rgb);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pColorSpace, _T("Failed to get the color space. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Chose the RGB color values
double color[] = { 1.0, 0.0, 0.0 };
size_t nColor = sizeof(color) / sizeof(double);
pTransparency = PtxPdfContent_Transparency_New(dAlpha);

// Create paint object
pPaint = PtxPdfContent_Paint_Create(pOutDoc, pColorSpace, color, nColor, pTransparency);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pPaint, _T("Failed to create a transparent paint. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Configure copy options
pCopyOptions = PtxPdf_PageCopyOptions_New();

// Loop through all pages of input
pInPageList = PtxPdf_Document_GetPages(pInDoc);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInPageList, _T("Failed to get the pages of the input document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
pOutPageList = PtxPdf_Document_GetPages(pOutDoc);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutPageList, _T("Failed to get the pages of the output document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
for (int i = 0; i < PtxPdf_PageList_GetCount(pInPageList); i++)
{
    // Get a list of pages
    pInPage = PtxPdf_PageList_Get(pInPageList, i);

    // Copy page from input to output
    pOutPage = PtxPdf_Page_Copy(pOutDoc, pInPage, pCopyOptions);
    GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutPage, _T("Failed to copy pages from input to output. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

    // Add stamp to page
    if (addStamp(pOutDoc, pOutPage, szStampString, pFont, 50) == 1)
    {
        goto cleanup;
    }

    // Add page to output document
    GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdf_PageList_Add(pOutPageList, pOutPage), _T("Failed to add page to output document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

    if (pOutPage != NULL)
    {
        Ptx_Release(pOutPage);
        pOutPage = NULL;
    }

    if (pInPage != NULL)
    {
        Ptx_Release(pInPage);
        pInPage = NULL;
    }
}

int copyDocumentData(TPtxPdf_Document * pInDoc, TPtxPdf_Document * pOutDoc)
{
    TPtxPdf_FileReferenceList* pInFileRefList;
    TPtxPdf_FileReferenceList* pOutFileRefList;

    // Output intent
    if (PtxPdf_Document_GetOutputIntent(pInDoc) != NULL)
        if (PtxPdf_Document_SetOutputIntent(pOutDoc, PtxPdfContent_IccBasedColorSpace_Copy(pOutDoc, PtxPdf_Document_GetOutputIntent(pInDoc))) == FALSE)
            return FALSE;

    // Metadata
    if (PtxPdf_Document_SetMetadata(pOutDoc, PtxPdf_Metadata_Copy(pOutDoc, PtxPdf_Document_GetMetadata(pInDoc))) == FALSE)
        return FALSE;

    // Viewer settings
    if (PtxPdf_Document_SetViewerSettings(pOutDoc, PtxPdfNav_ViewerSettings_Copy(pOutDoc, PtxPdf_Document_GetViewerSettings(pInDoc))) == FALSE)
        return FALSE;

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    pInFileRefList = PtxPdf_Document_GetAssociatedFiles(pInDoc);
    pOutFileRefList = PtxPdf_Document_GetAssociatedFiles(pOutDoc);
    if (pInFileRefList == NULL || pOutFileRefList == NULL)
        return FALSE;
    for (int iFileRef = 0; iFileRef < PtxPdf_FileReferenceList_GetCount(pInFileRefList); iFileRef++)
        if (PtxPdf_FileReferenceList_Add(pOutFileRefList, PtxPdf_FileReference_Copy(pOutDoc, PtxPdf_FileReferenceList_Get(pInFileRefList, iFileRef))) == FALSE)
            return FALSE;

    // Plain embedded files
    pInFileRefList = PtxPdf_Document_GetPlainEmbeddedFiles(pInDoc);
    pOutFileRefList = PtxPdf_Document_GetPlainEmbeddedFiles(pOutDoc);
    if (pInFileRefList == NULL || pOutFileRefList == NULL)
        return FALSE;
    for (int iFileRef = 0; iFileRef < PtxPdf_FileReferenceList_GetCount(pInFileRefList); iFileRef++)
        if (PtxPdf_FileReferenceList_Add(pOutFileRefList, PtxPdf_FileReference_Copy(pOutDoc, PtxPdf_FileReferenceList_Get(pInFileRefList, iFileRef))) == FALSE)
            return FALSE;

    return TRUE;
}

int addStamp(TPtxPdf_Document* pOutDoc, TPtxPdf_Page* pOutPage, TCHAR* szStampString, TPtxPdfContent_Font* pFont, double dFontSize)
{
    TPtxPdfContent_ContentGenerator* pGenerator = NULL;
    TPtxPdfContent_Text* pText = NULL;
    TPtxPdfContent_TextGenerator* pTextGenerator = NULL;
    TPtxGeomReal_AffineTransform trans;
    TPtxGeomReal_Point rotationCenter;
    double dTextWidth;
    double dFontAscent;

    TPtxPdfContent_Content* pContent = PtxPdf_Page_GetContent(pOutPage);

    // Create content generator
    pGenerator = PtxPdfContent_ContentGenerator_New(pContent, FALSE);
    GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pGenerator, _T("Failed to create a content generator. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

    // Create text object
    pText = PtxPdfContent_Text_Create(pOutDoc);
    GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pText, _T("Failed to create a text object. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

    // Create a text generator 
    pTextGenerator = PtxPdfContent_TextGenerator_New(pText, pFont, dFontSize, NULL);
    GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pTextGenerator, _T("Failed to create a text generator. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

    // Get output page size
    TPtxGeomReal_Size size;
    GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdf_Page_GetSize(pOutPage, &size), _T("Failed to read page size. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

    // Calculate point and angle of rotation
    rotationCenter.dX = size.dWidth / 2.0;
    rotationCenter.dY = size.dHeight / 2.0;
    double dRotationAngle = atan2(size.dHeight, size.dWidth) / M_PI * 180.0;

    // Rotate textinput around the calculated position
    PtxGeomReal_AffineTransform_GetIdentity(&trans);
    GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxGeomReal_AffineTransform_Rotate(&trans, dRotationAngle, &rotationCenter), _T("Failed to rotate textinput around the calculated position. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
    GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdfContent_ContentGenerator_Transform(pGenerator, &trans), _T("Failed to modify the current transformation. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

    // Calculate position
    TPtxGeomReal_Point position;
    dTextWidth = PtxPdfContent_TextGenerator_GetWidth(pTextGenerator, szStampString);
    GOTO_CLEANUP_IF_ZERO_PRINT_ERROR(dTextWidth, _T("%s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
    dFontAscent = PtxPdfContent_Font_GetAscent(pFont);
    GOTO_CLEANUP_IF_ZERO_PRINT_ERROR(dFontAscent, _T("%s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
    position.dX = (size.dWidth - dTextWidth) / 2.0;
    position.dY = (size.dHeight - dFontAscent * dFontSize) / 2.0;

    // Move to position
    GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdfContent_TextGenerator_MoveTo(pTextGenerator, &position), _T("Failed to move to position. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
    // Set text rendering
    GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdfContent_TextGenerator_SetFill(pTextGenerator, pPaint), _T("Failed to set fill paint. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
    // Add given stamp string
    GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdfContent_TextGenerator_ShowLine(pTextGenerator, szStampString), _T("Failed to add stamp. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

    // Close text generator
    if (pTextGenerator != NULL)
    {
        PtxPdfContent_TextGenerator_Close(pTextGenerator);
        pTextGenerator = NULL;
    }

    // Paint the positioned text
    GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdfContent_ContentGenerator_PaintText(pGenerator, pText), _T("Failed to paint the positioned text. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

cleanup:
    if (pTextGenerator != NULL)
        PtxPdfContent_TextGenerator_Close(pTextGenerator);
    if (pText != NULL)
        Ptx_Release(pText);
    if (pGenerator != NULL)
        PtxPdfContent_ContentGenerator_Close(pGenerator);
    if (pContent != NULL)
        Ptx_Release(pContent);

    return iReturnValue;
}

// Open input document
using (Stream inStream = new FileStream(inPath, FileMode.Open, FileAccess.Read))
using (Document inDoc = Document.Open(inStream, null))

// Create output document
using (Stream outStream = new FileStream(outPath, FileMode.Create, FileAccess.ReadWrite))
using (Document outDoc = Document.Create(outStream, inDoc.Conformance, null))
{
    // Copy document-wide data
    CopyDocumentData(inDoc, outDoc);

    // Create a font
    font = Font.CreateFromSystem(outDoc, "Arial", "Italic", true);

    // Define page copy options
    PageCopyOptions copyOptions = new PageCopyOptions();

    // Copy first page, add text, and append to output document
    Page outPage = Page.Copy(outDoc, inDoc.Pages[0], copyOptions);
    AddText(outDoc, outPage, textString);
    outDoc.Pages.Add(outPage);

    // Copy remaining pages and append to output document
    PageList inPageRange = inDoc.Pages.GetRange(1, inDoc.Pages.Count - 1);
    PageList copiedPages = PageList.Copy(outDoc, inPageRange, copyOptions);
    outDoc.Pages.AddRange(copiedPages);
}

private static void CopyDocumentData(Document inDoc, Document outDoc)
{
    // Copy document-wide data

    // Output intent
    if (inDoc.OutputIntent != null)
        outDoc.OutputIntent = IccBasedColorSpace.Copy(outDoc, inDoc.OutputIntent);

    // Metadata
    outDoc.Metadata = Metadata.Copy(outDoc, inDoc.Metadata);

    // Viewer settings
    outDoc.ViewerSettings = ViewerSettings.Copy(outDoc, inDoc.ViewerSettings);

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.AssociatedFiles;
    foreach (FileReference inFileRef in inDoc.AssociatedFiles)
        outAssociatedFiles.Add(FileReference.Copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.PlainEmbeddedFiles;
    foreach (FileReference inFileRef in inDoc.PlainEmbeddedFiles)
        outEmbeddedFiles.Add(FileReference.Copy(outDoc, inFileRef));
}

private static void AddText(Document outputDoc, Page outPage, string textString)
{
    // Create content generator and text object
    using ContentGenerator gen = new ContentGenerator(outPage.Content, false);
    Text text = Text.Create(outputDoc);

    // Create text generator
    using (TextGenerator textGenerator = new TextGenerator(text, font, fontSize, null))
    {
        // Calculate position
        Point position = new Point
        {
            X = border,
            Y = outPage.Size.Height - border - fontSize * font.Ascent
        };

        // Move to position
        textGenerator.MoveTo(position);
        // Add given text string
        textGenerator.ShowLine(textString);
    }
    // Paint the positioned text
    gen.PaintText(text);
}

try (// Open input document
    FileStream inStream = new FileStream(inPath, FileStream.Mode.READ_ONLY);
    Document inDoc = Document.open(inStream, null);
    FileStream outStream = new FileStream(outPath, FileStream.Mode.READ_WRITE_NEW)) {
    try (// Create output document
        Document outDoc = Document.create(outStream, inDoc.getConformance(), null)) {
        // Copy document-wide data
        copyDocumentData(inDoc, outDoc);

        // Create embedded font in output document
        font = Font.createFromSystem(outDoc, "Arial", "Italic", true);

        // Define page copy options
        PageCopyOptions copyOptions = new PageCopyOptions();

        // Copy first page, add text, and append to output document
        Page outPage = Page.copy(outDoc, inDoc.getPages().get(0), copyOptions);
        addText(outDoc, outPage, textString);
        outDoc.getPages().add(outPage);

        // Copy remaining pages and append to output document
        PageList inPageRange = inDoc.getPages().subList(1, inDoc.getPages().size());
        PageList copiedPages = PageList.copy(outDoc, inPageRange, copyOptions);
        outDoc.getPages().addAll(copiedPages);
    }
}

private static void copyDocumentData(Document inDoc, Document outDoc) throws PdfToolboxException, IOException {
    // Copy document-wide data (excluding metadata)

    // Output intent
    if (inDoc.getOutputIntent() != null)
        outDoc.setOutputIntent(IccBasedColorSpace.copy(outDoc, inDoc.getOutputIntent()));

    // Viewer settings
    outDoc.setViewerSettings(ViewerSettings.copy(outDoc, inDoc.getViewerSettings()));

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.getAssociatedFiles();
    for (FileReference inFileRef : inDoc.getAssociatedFiles())
        outAssociatedFiles.add(FileReference.copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.getPlainEmbeddedFiles();
    for (FileReference inFileRef : inDoc.getPlainEmbeddedFiles())
        outEmbeddedFiles.add(FileReference.copy(outDoc, inFileRef));
}

private static void addText(Document outputDoc, Page outPage, String textString)
        throws PdfToolboxException, IOException {
    try (// Create content generator
        ContentGenerator generator = new ContentGenerator(outPage.getContent(), false)) {
        // Create text object
        Text text = Text.create(outputDoc);

        try (// Create a text generator
            TextGenerator textgenerator = new TextGenerator(text, font, fontSize, null)) {
            // Calculate position
            Point position = new Point(border, outPage.getSize().height - border - fontSize * font.getAscent());

            // Move to position
            textgenerator.moveTo(position);
            // Add given text string
            textgenerator.showLine(textString);
        }

        // Paint the positioned text
        generator.paintText(text);
    }
}

// Open input document
pInStream = _tfopen(szInPath, _T("rb"));
GOTO_CLEANUP_IF_NULL(pInStream, _T("Failed to open input file \"%s\".\n"), szInPath);
PtxSysCreateFILEStreamDescriptor(&descriptor, pInStream, 0);
pInDoc = PtxPdf_Document_Open(&descriptor, _T(""));
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInDoc, _T("Input file \"%s\" cannot be opened. %s (ErrorCode: 0x%08x).\n"), szInPath, szErrorBuff, Ptx_GetLastError());

// Create output document
pOutStream = _tfopen(szOutPath, _T("wb+"));
GOTO_CLEANUP_IF_NULL(pOutStream, _T("Failed to open output file \"%s\".\n"), szOutPath);
PtxSysCreateFILEStreamDescriptor(&outDescriptor, pOutStream, 0);
iConformance = PtxPdf_Document_GetConformance(pInDoc);
pOutDoc = PtxPdf_Document_Create(&outDescriptor, &iConformance, NULL);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutDoc, _T("Output file \"%s\" cannot be created. %s (ErrorCode: 0x%08x).\n"), szOutPath, szErrorBuff, Ptx_GetLastError());

// Create embedded font in output document
pFont = PtxPdfContent_Font_CreateFromSystem(pOutDoc, _T("Arial"), _T("Italic"), TRUE);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pFont, _T("Failed to create font. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Copy document-wide data
GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(copyDocumentData(pInDoc, pOutDoc), _T("Failed to copy document-wide data. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Configure copy options
pCopyOptions = PtxPdf_PageCopyOptions_New();

// Get page lists of input and output document
pInPageList = PtxPdf_Document_GetPages(pInDoc);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInPageList, _T("Failed to get the pages of the input document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
pOutPageList = PtxPdf_Document_GetPages(pOutDoc);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutPageList, _T("Failed to get the pages of the output document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Copy first page
pInPage = PtxPdf_PageList_Get(pInPageList, 0);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInPage, _T("Failed to get the first page. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
pOutPage = PtxPdf_Page_Copy(pOutDoc, pInPage, pCopyOptions);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutPage, _T("Failed to copy page. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Add text to copied page
if (addText(pOutDoc, pOutPage, szTextString, pFont, 15) != 0)
    goto cleanup;

// Add page to output document
GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdf_PageList_Add(pOutPageList, pOutPage), _T("Failed to add page to output document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Get remaining pages from input
pInPageRange = PtxPdf_PageList_GetRange(pInPageList, 1, PtxPdf_PageList_GetCount(pInPageList) - 1);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInPageRange, _T("Failed to get page range from input document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Copy remaining pages to output
pOutPageRange = PtxPdf_PageList_Copy(pOutDoc, pInPageRange, pCopyOptions);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutPageRange, _T("Failed to copy page range to output document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Add the copied pages to the output document
GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdf_PageList_AddRange(pOutPageList, pOutPageRange), _T("Failed to add page range to output page list. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

int copyDocumentData(TPtxPdf_Document * pInDoc, TPtxPdf_Document * pOutDoc)
{
    TPtxPdf_FileReferenceList* pInFileRefList;
    TPtxPdf_FileReferenceList* pOutFileRefList;

    // Output intent
    if (PtxPdf_Document_GetOutputIntent(pInDoc) != NULL)
        if (PtxPdf_Document_SetOutputIntent(pOutDoc, PtxPdfContent_IccBasedColorSpace_Copy(pOutDoc, PtxPdf_Document_GetOutputIntent(pInDoc))) == FALSE)
            return FALSE;

    // Metadata
    if (PtxPdf_Document_SetMetadata(pOutDoc, PtxPdf_Metadata_Copy(pOutDoc, PtxPdf_Document_GetMetadata(pInDoc))) == FALSE)
        return FALSE;

    // Viewer settings
    if (PtxPdf_Document_SetViewerSettings(pOutDoc, PtxPdfNav_ViewerSettings_Copy(pOutDoc, PtxPdf_Document_GetViewerSettings(pInDoc))) == FALSE)
        return FALSE;

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    pInFileRefList = PtxPdf_Document_GetAssociatedFiles(pInDoc);
    pOutFileRefList = PtxPdf_Document_GetAssociatedFiles(pOutDoc);
    if (pInFileRefList == NULL || pOutFileRefList == NULL)
        return FALSE;
    for (int iFileRef = 0; iFileRef < PtxPdf_FileReferenceList_GetCount(pInFileRefList); iFileRef++)
        if (PtxPdf_FileReferenceList_Add(pOutFileRefList, PtxPdf_FileReference_Copy(pOutDoc, PtxPdf_FileReferenceList_Get(pInFileRefList, iFileRef))) == FALSE)
            return FALSE;

    // Plain embedded files
    pInFileRefList = PtxPdf_Document_GetPlainEmbeddedFiles(pInDoc);
    pOutFileRefList = PtxPdf_Document_GetPlainEmbeddedFiles(pOutDoc);
    if (pInFileRefList == NULL || pOutFileRefList == NULL)
        return FALSE;
    for (int iFileRef = 0; iFileRef < PtxPdf_FileReferenceList_GetCount(pInFileRefList); iFileRef++)
        if (PtxPdf_FileReferenceList_Add(pOutFileRefList, PtxPdf_FileReference_Copy(pOutDoc, PtxPdf_FileReferenceList_Get(pInFileRefList, iFileRef))) == FALSE)
            return FALSE;

    return TRUE;
}

int addText(TPtxPdf_Document* pOutDoc, TPtxPdf_Page* pOutPage, TCHAR* szTextString, TPtxPdfContent_Font* pFont, double dFontSize)
{
    TPtxPdfContent_Content* pContent = NULL;
    TPtxPdfContent_ContentGenerator* pGenerator = NULL;
    TPtxPdfContent_Text* pText = NULL;
    TPtxPdfContent_TextGenerator* pTextGenerator = NULL;
    TPtxGeomReal_Size size;
    TPtxGeomReal_Point position;
    double dFontAscent;

    pContent = PtxPdf_Page_GetContent(pOutPage);
    GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pContent, _T("Failed to get content of output file. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

    // Create content generator
    pGenerator = PtxPdfContent_ContentGenerator_New(pContent, FALSE);
    GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pGenerator, _T("Failed to create a content generator. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

    // Create text object
    pText = PtxPdfContent_Text_Create(pOutDoc);
    GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pText, _T("Failed to create text object. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

    // Create a text generator
    pTextGenerator = PtxPdfContent_TextGenerator_New(pText, pFont, dFontSize, NULL);
    GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pTextGenerator, _T("Failed to create a text generator. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

    // Get output page size
    GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdf_Page_GetSize(pOutPage, &size), _T("Failed to read page size. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

     dFontAscent = PtxPdfContent_Font_GetAscent(pFont);
    GOTO_CLEANUP_IF_ZERO_PRINT_ERROR(dFontAscent, _T("%s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

    // Calculate position
    position.dX = dBorder;
    position.dY = size.dHeight - dBorder - dFontSize * dFontAscent;

    // Move to position
    GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdfContent_TextGenerator_MoveTo(pTextGenerator, &position), _T("Failed to move to position. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
    // Add given text string
    GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdfContent_TextGenerator_ShowLine(pTextGenerator, szTextString), _T("Failed to add text string. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
    // Close text generator
    PtxPdfContent_TextGenerator_Close(pTextGenerator);
    pTextGenerator = NULL;

    // Paint the positioned text
    GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdfContent_ContentGenerator_PaintText(pGenerator, pText), _T("Failed to paint the positioned text. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

cleanup:
    if (pTextGenerator != NULL)
        PtxPdfContent_TextGenerator_Close(pTextGenerator);
    if (pText != NULL)
        Ptx_Release(pText);
    if (pGenerator != NULL)
        PtxPdfContent_ContentGenerator_Close(pGenerator);
    if (pContent != NULL)
        Ptx_Release(pContent);

    return iReturnValue;
}

// Open input document 
using (System.IO.Stream inStream = new System.IO.FileStream(inPath, System.IO.FileMode.Open, System.IO.FileAccess.Read))
using (Document inDoc = Document.Open(inStream, null))

// Create output document
using (System.IO.Stream outStream = new System.IO.FileStream(outPath, System.IO.FileMode.Create, System.IO.FileAccess.ReadWrite))
using (Document outDoc = Document.Create(outStream, inDoc.Conformance, null))
{
    // Copy document-wide data
    CopyDocumentData(inDoc, outDoc);

    // Define page copy options
    PageCopyOptions copyOptions = new PageCopyOptions();

    // Copy all pages from input document
    foreach (Page inPage in inDoc.Pages)
    {
        Page outPage = Page.Copy(outDoc, inPage, copyOptions);

        // Add a line
        AddLine(outDoc, outPage);

        // Add page to output document 
        outDoc.Pages.Add(outPage);
    }
}

private static void CopyDocumentData(Document inDoc, Document outDoc)
{
    // Copy document-wide data

    // Output intent
    if (inDoc.OutputIntent != null)
        outDoc.OutputIntent = IccBasedColorSpace.Copy(outDoc, inDoc.OutputIntent);

    // Metadata
    outDoc.Metadata = Metadata.Copy(outDoc, inDoc.Metadata);

    // Viewer settings
    outDoc.ViewerSettings = ViewerSettings.Copy(outDoc, inDoc.ViewerSettings);

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.AssociatedFiles;
    foreach (FileReference inFileRef in inDoc.AssociatedFiles)
        outAssociatedFiles.Add(FileReference.Copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.PlainEmbeddedFiles;
    foreach (FileReference inFileRef in inDoc.PlainEmbeddedFiles)
        outEmbeddedFiles.Add(FileReference.Copy(outDoc, inFileRef));
}

private static void AddLine(Document document, Page page)
{
    // Create content generator 
    using ContentGenerator generator = new ContentGenerator(page.Content, false);

    // Create a path
    Path path = new Path();
    using (PathGenerator pathGenerator = new PathGenerator(path))
    {
        // Draw a line diagonally across the page
        Size pageSize = page.Size;
        pathGenerator.MoveTo(new Point() { X = 10.0, Y = 10.0 });
        pathGenerator.LineTo(new Point() { X = pageSize.Width - 10.0, Y = pageSize.Height - 10.0 });
    }

    // Create a RGB color space
    ColorSpace deviceRgbColorSpace = ColorSpace.CreateProcessColorSpace(document, ProcessColorSpaceType.Rgb);

    // Create a red color
    double[] color = new double[] { 1.0, 0.0, 0.0 };

    // Create a paint
    Paint paint = Paint.Create(document, deviceRgbColorSpace, color, null);

    // Create stroking parameters with given paint and line width
    Stroke stroke = new Stroke(paint, 10.0);

    // Draw the path onto the page
    generator.PaintPath(path, null, stroke);
}

try (// Open input document
    FileStream inStream = new FileStream(inPath, FileStream.Mode.READ_ONLY);
    Document inDoc = Document.open(inStream, null);
    FileStream outStream = new FileStream(outPath, FileStream.Mode.READ_WRITE_NEW)) {
    try (// Create output document
        Document outDoc = Document.create(outStream, inDoc.getConformance(), null)) {

        // Copy document-wide data
        copyDocumentData(inDoc, outDoc);

        // Define page copy options
        PageCopyOptions copyOptions = new PageCopyOptions();

        // Copy all pages
        for (Page inPage : inDoc.getPages()) {
            // Copy page from input to output
            Page outPage = Page.copy(outDoc, inPage, copyOptions);

            // Add a line
            addLine(outDoc, outPage);

            // Add page to output document
            outDoc.getPages().add(outPage);
        }
    }
}

private static void copyDocumentData(Document inDoc, Document outDoc) throws PdfToolboxException, IOException {
    // Copy document-wide data

    // Output intent
    if (inDoc.getOutputIntent() != null)
        outDoc.setOutputIntent(IccBasedColorSpace.copy(outDoc, inDoc.getOutputIntent()));

    // Metadata
    outDoc.setMetadata(Metadata.copy(outDoc, inDoc.getMetadata()));

    // Viewer settings
    outDoc.setViewerSettings(ViewerSettings.copy(outDoc, inDoc.getViewerSettings()));

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.getAssociatedFiles();
    for (FileReference inFileRef : inDoc.getAssociatedFiles())
        outAssociatedFiles.add(FileReference.copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.getPlainEmbeddedFiles();
    for (FileReference inFileRef : inDoc.getPlainEmbeddedFiles())
        outEmbeddedFiles.add(FileReference.copy(outDoc, inFileRef));
}

private static void addLine(Document document, Page outPage)
        throws PdfToolboxException, IOException {
    try (// Create content generator
        ContentGenerator generator = new ContentGenerator(outPage.getContent(), false)) {

        // Create a path
        Path path = new Path();
        try (// Create a path generator
            PathGenerator pathGenerator = new PathGenerator(path)) {
            // Draw a line diagonally across the page
            Size pageSize = outPage.getSize();
            pathGenerator.moveTo(new Point(10.0, 10.0));
            pathGenerator.lineTo(new Point(pageSize.width - 10.0, pageSize.height - 10.0));
        }

        // Create a RGB color space
        ColorSpace deviceRgbColorSpace = ColorSpace.createProcessColorSpace(document, ProcessColorSpaceType.RGB);

        // Create a red color
        double[] color = new double[] { 1.0, 0.0, 0.0 };

        // Create a paint
        Paint paint = Paint.create(document, deviceRgbColorSpace, color, null);

        // Create stroking parameters with given paint and line width
        Stroke stroke = new Stroke(paint, 10.0);

        // Draw the path onto the page
        generator.paintPath(path, null, stroke);
    }
}

// Open input document
pInStream = _tfopen(szInPath, _T("rb"));
GOTO_CLEANUP_IF_NULL(pInStream, _T("Failed to open input file \"%s\".\n"), szInPath);
PtxSysCreateFILEStreamDescriptor(&descriptor, pInStream, 0);
pInDoc = PtxPdf_Document_Open(&descriptor, _T(""));
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInDoc, _T("Input file \"%s\" cannot cannot be opened. %s (ErrorCode: 0x%08x).\n"), szInPath, szErrorBuff, Ptx_GetLastError());

// Create output document
pOutStream = _tfopen(szOutPath, _T("wb+"));
GOTO_CLEANUP_IF_NULL(pOutStream, _T("Failed to open output file \"%s\".\n"), szOutPath);
PtxSysCreateFILEStreamDescriptor(&outDescriptor, pOutStream, 0);
iConformance = PtxPdf_Document_GetConformance(pInDoc);
pOutDoc = PtxPdf_Document_Create(&outDescriptor, &iConformance, NULL);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutDoc, _T("Output file \"%s\" cannot be created. %s (ErrorCode: 0x%08x).\n"), szOutPath, szErrorBuff, Ptx_GetLastError());

// Copy document-wide data
GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(copyDocumentData(pInDoc, pOutDoc), _T("Failed to copy document-wide data. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Configure copy options
pCopyOptions = PtxPdf_PageCopyOptions_New();

// Loop through all pages of input
pInPageList = PtxPdf_Document_GetPages(pInDoc);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInPageList, _T("Failed to get the pages of the input document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
pOutPageList = PtxPdf_Document_GetPages(pOutDoc);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutPageList, _T("Failed to get the pages of the output document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
for (int iPage = 1; iPage <= PtxPdf_PageList_GetCount(pInPageList); iPage++)
{
    pInPage = PtxPdf_PageList_Get(pInPageList, iPage - 1);

    // Copy page from input to output
    pOutPage = PtxPdf_Page_Copy(pOutDoc, pInPage, pCopyOptions);
    GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutPage, _T("Failed to copy pages from input to output. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
    PtxPdf_Page_GetSize(pOutPage, &size);

    //Add text on first page
    if (addLine(pOutDoc, pOutPage) == 1)
    {
        goto cleanup;
    }

    // Add page to output document
    GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdf_PageList_Add(pOutPageList, pOutPage), _T("Failed to add page to output document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

    if (pOutPage != NULL)
    {
        Ptx_Release(pOutPage);
        pOutPage = NULL;
    }

    if (pInPage != NULL)
    {
        Ptx_Release(pInPage);
        pInPage = NULL;
    }
}

int copyDocumentData(TPtxPdf_Document * pInDoc, TPtxPdf_Document * pOutDoc)
{
    TPtxPdf_FileReferenceList* pInFileRefList;
    TPtxPdf_FileReferenceList* pOutFileRefList;

    // Output intent
    if (PtxPdf_Document_GetOutputIntent(pInDoc) != NULL)
        if (PtxPdf_Document_SetOutputIntent(pOutDoc, PtxPdfContent_IccBasedColorSpace_Copy(pOutDoc, PtxPdf_Document_GetOutputIntent(pInDoc))) == FALSE)
            return FALSE;

    // Metadata
    if (PtxPdf_Document_SetMetadata(pOutDoc, PtxPdf_Metadata_Copy(pOutDoc, PtxPdf_Document_GetMetadata(pInDoc))) == FALSE)
        return FALSE;

    // Viewer settings
    if (PtxPdf_Document_SetViewerSettings(pOutDoc, PtxPdfNav_ViewerSettings_Copy(pOutDoc, PtxPdf_Document_GetViewerSettings(pInDoc))) == FALSE)
        return FALSE;

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    pInFileRefList = PtxPdf_Document_GetAssociatedFiles(pInDoc);
    pOutFileRefList = PtxPdf_Document_GetAssociatedFiles(pOutDoc);
    if (pInFileRefList == NULL || pOutFileRefList == NULL)
        return FALSE;
    for (int iFileRef = 0; iFileRef < PtxPdf_FileReferenceList_GetCount(pInFileRefList); iFileRef++)
        if (PtxPdf_FileReferenceList_Add(pOutFileRefList, PtxPdf_FileReference_Copy(pOutDoc, PtxPdf_FileReferenceList_Get(pInFileRefList, iFileRef))) == FALSE)
            return FALSE;

    // Plain embedded files
    pInFileRefList = PtxPdf_Document_GetPlainEmbeddedFiles(pInDoc);
    pOutFileRefList = PtxPdf_Document_GetPlainEmbeddedFiles(pOutDoc);
    if (pInFileRefList == NULL || pOutFileRefList == NULL)
        return FALSE;
    for (int iFileRef = 0; iFileRef < PtxPdf_FileReferenceList_GetCount(pInFileRefList); iFileRef++)
        if (PtxPdf_FileReferenceList_Add(pOutFileRefList, PtxPdf_FileReference_Copy(pOutDoc, PtxPdf_FileReferenceList_Get(pInFileRefList, iFileRef))) == FALSE)
            return FALSE;

    return TRUE;
}

int addLine(TPtxPdf_Document * pOutDoc, TPtxPdf_Page * pOutPage)
{
    TPtxPdfContent_Content* pContent = NULL;
    TPtxPdfContent_ContentGenerator* pGenerator = NULL;
    TPtxPdfContent_Path* pPath = NULL;
    TPtxPdfContent_PathGenerator* pPathGenerator = NULL;
    TPtxPdfContent_ColorSpace* pDeviceRgbColorSpace = NULL;
    double aColor[3];
    TPtxPdfContent_Paint* pPaint = NULL;
    TPtxPdfContent_Stroke* pStroke;
    TPtxGeomReal_Size pageSize;
    TPtxGeomReal_Point point;

    pContent = PtxPdf_Page_GetContent(pOutPage);
    PtxPdf_Page_GetSize(pOutPage, &pageSize);

    // Create content generator
    pGenerator = PtxPdfContent_ContentGenerator_New(pContent, FALSE);
    GOTO_CLEANUP_IF_NULL(pGenerator, szErrorBuff, Ptx_GetLastError());

    // Create a path
    pPath = PtxPdfContent_Path_New();
    GOTO_CLEANUP_IF_NULL(pPath, szErrorBuff, Ptx_GetLastError());

    // Create a path generator
    pPathGenerator = PtxPdfContent_PathGenerator_New(pPath);
    GOTO_CLEANUP_IF_NULL(pPathGenerator, szErrorBuff, Ptx_GetLastError());

    // Draw a line diagonally across the page
    point.dX = 10.0;
    point.dY = 10.0;
    GOTO_CLEANUP_IF_FALSE(PtxPdfContent_PathGenerator_MoveTo(pPathGenerator, &point), szErrorBuff, Ptx_GetLastError());
    point.dX = pageSize.dWidth - 10.0;
    point.dY = pageSize.dHeight - 10.0;
    GOTO_CLEANUP_IF_FALSE(PtxPdfContent_PathGenerator_LineTo(pPathGenerator, &point), szErrorBuff, Ptx_GetLastError());

    // Close the path generator in order to finish the path
    PtxPdfContent_PathGenerator_Close(pPathGenerator);
    pPathGenerator = NULL;

    // Create a RGB color space
    pDeviceRgbColorSpace = PtxPdfContent_ColorSpace_CreateProcessColorSpace(pOutDoc, ePtxPdfContent_ProcessColorSpaceType_Rgb);
    GOTO_CLEANUP_IF_NULL(pDeviceRgbColorSpace, szErrorBuff, Ptx_GetLastError());

    // Initialize a red color
    aColor[0] = 1.0;
    aColor[1] = 0.0;
    aColor[2] = 0.0;

    // Create a paint
    pPaint = PtxPdfContent_Paint_Create(pOutDoc, pDeviceRgbColorSpace, aColor, sizeof(aColor) / sizeof(aColor[0]), NULL);
    GOTO_CLEANUP_IF_NULL(pPaint, szErrorBuff, Ptx_GetLastError());

    // Setup stroking parameters with given paint and line width
    pStroke = PtxPdfContent_Stroke_New(pPaint, 10.0);
    GOTO_CLEANUP_IF_NULL(pStroke, szErrorBuff, Ptx_GetLastError());

    // Draw the path onto the page
    GOTO_CLEANUP_IF_FALSE(PtxPdfContent_ContentGenerator_PaintPath(pGenerator, pPath, NULL, pStroke), szErrorBuff, Ptx_GetLastError());

cleanup:
    if (pPathGenerator != NULL)
        PtxPdfContent_PathGenerator_Close(pPathGenerator);
    if (pGenerator != NULL)
        PtxPdfContent_ContentGenerator_Close(pGenerator);
    if (pContent != NULL)
        Ptx_Release(pContent);

    return iReturnValue;
}

// Create output document
using (Stream outStream = new FileStream(outPath, FileMode.CreateNew, FileAccess.ReadWrite))
using (Document outDoc = Document.Create(outStream, null, null))
{
    Font font = Font.CreateFromSystem(outDoc, "Arial", "Italic", true);

    // Create page
    Page outPage = Page.Create(outDoc, PageSize);

    // Add text as justified text
    LayoutText(outDoc, outPage, textPath, font, 20);

    // Add page to document
    outDoc.Pages.Add(outPage);
}

private static void LayoutText(Document outputDoc, Page outPage, string textPath, Font font,
    double fontSize)
{
    // Create content generator 
    using ContentGenerator gen = new ContentGenerator(outPage.Content, false);

    // Create text object
    Text text = Text.Create(outputDoc);

    // Create text generator
    using TextGenerator textGenerator = new TextGenerator(text, font, fontSize, null);

    // Calculate position
    Point position = new Point
    {
        X = Border,
        Y = outPage.Size.Height - Border
    };

    // Move to position
    textGenerator.MoveTo(position);

    // Loop throw all lines of the textinput
    string[] lines = File.ReadAllLines(textPath, Encoding.Default);
    foreach (string line in lines)
    {
        // Split string in substrings
        string[] substrings = line.Split(new char[] { ' ' }, StringSplitOptions.None);
        string currentLine = null;
        double maxWidth = outPage.Size.Width - Border * 2;
        int wordcount = 0;

        // Loop throw all words of input strings
        foreach (string word in substrings)
        {
            string tempLine;

            // Concatenate substrings to line
            if (currentLine != null)
                tempLine = currentLine + " " + word;
            else
                tempLine = word;

            // Calculate the current width of line
            double width = textGenerator.GetWidth(currentLine);
            if (textGenerator.GetWidth(tempLine) > maxWidth)
            {
                // Calculate the word spacing
                textGenerator.WordSpacing = (maxWidth - width) / (wordcount - 1);
                // Paint on new line
                textGenerator.ShowLine(currentLine);
                textGenerator.WordSpacing = 0;
                currentLine = word;
                wordcount = 1;
            }
            else
            {
                currentLine = tempLine;
                wordcount++;
            }
        }
        textGenerator.WordSpacing = 0;
        // Add given stamp string
        textGenerator.ShowLine(currentLine);
    }
    // Paint the positioned text
    gen.PaintText(text);
}

try (
    FileStream outStream = new FileStream(outPath, FileStream.Mode.READ_WRITE_NEW)) {
    try (// Create output document
        Document outDoc = Document.create(outStream, null, null)) {
        // Create embedded font in output document
        Font font = Font.createFromSystem(outDoc, "Arial", "Italic", true);

        // Create page
        Page outPage = Page.create(outDoc, new Size(595, 842));

        // Add text to document
        layoutText(outDoc, outPage, textPath, font, 20);

        // Add page to output document
        outDoc.getPages().add(outPage);
    }
}

private static void layoutText(Document outputDoc, Page outPage, String textPath, Font font, double fontSize)
        throws PdfToolboxException, IOException {
    try (// Create content generator
        ContentGenerator generator = new ContentGenerator(outPage.getContent(), false)) {
        // Create text object
        Text text = Text.create(outputDoc);

        try (// Create a text generator
            TextGenerator textGenerator = new TextGenerator(text, font, fontSize, null)) {

            // Calculate position
            Point position = new Point(Border, outPage.getSize().height - Border);

            // Move to position
            textGenerator.moveTo(position);

            // Loop throw all lines of the textinput
            List lines = Files.readAllLines(Paths.get(textPath), Charset.defaultCharset());
            for (String line : lines) {
                // Split string in substrings
                String[] substrings = line.split(" ");
                String currentLine = null;
                double maxWidth = outPage.getSize().width - (Border * 2);

                int wordCount = 0;

                // Loop throw all words of input strings
                for (String word : substrings) {
                    String tempLine;

                    // Concatenate substrings to line
                    if (currentLine != null) {
                        tempLine = currentLine + " " + word;
                    } else {
                        tempLine = word;
                    }

                    // Calculate the current width of line
                    double width = textGenerator.getWidth(currentLine);

                    if ((textGenerator.getWidth(tempLine) > maxWidth)) {
                        // Calculate the word spacing
                        textGenerator.setWordSpacing((maxWidth - width) / (double) (wordCount - 1));

                        // Paint on new line
                        textGenerator.showLine(currentLine);
                        textGenerator.setWordSpacing(0);
                        currentLine = word;
                        wordCount = 1;
                    } else {
                        currentLine = tempLine;
                        wordCount++;
                    }
                }
                textGenerator.setWordSpacing(0);
                // Add given stamp string
                textGenerator.showLine(currentLine);
            }
        }
        // Paint the positioned text
        generator.paintText(text);
    }
}

// Open input document
using (Stream inStream = new FileStream(inPath, FileMode.Open, FileAccess.Read))
using (Document inDoc = Document.Open(inStream, null))

// Create output document
using (Stream outStream = new FileStream(outPath, FileMode.Create, FileAccess.ReadWrite))
using (Document outDoc = Document.Create(outStream, inDoc.Conformance, null))
{
    // Copy document-wide data
    CopyDocumentData(inDoc, outDoc);

    // Define page copy options
    PageCopyOptions copyOptions = new PageCopyOptions();

    // Create embedded font in output document 
    Font font = Font.CreateFromSystem(outDoc, "Arial", string.Empty, true);

    // Copy all pages from input document
    int currentPageNumber = 1;
    foreach (Page inPage in inDoc.Pages)
    {
        // Copy page from input to output
        Page outPage = Page.Copy(outDoc, inPage, copyOptions);

        // Stamp page number on current page of output document
        AddPageNumber(outDoc, outPage, font, currentPageNumber++);

        // Add page to output document
        outDoc.Pages.Add(outPage);
    }
}

private static void CopyDocumentData(Document inDoc, Document outDoc)
{
    // Copy document-wide data

    // Output intent
    if (inDoc.OutputIntent != null)
        outDoc.OutputIntent = IccBasedColorSpace.Copy(outDoc, inDoc.OutputIntent);

    // Metadata
    outDoc.Metadata = Metadata.Copy(outDoc, inDoc.Metadata);

    // Viewer settings
    outDoc.ViewerSettings = ViewerSettings.Copy(outDoc, inDoc.ViewerSettings);

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.AssociatedFiles;
    foreach (FileReference inFileRef in inDoc.AssociatedFiles)
        outAssociatedFiles.Add(FileReference.Copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.PlainEmbeddedFiles;
    foreach (FileReference inFileRef in inDoc.PlainEmbeddedFiles)
        outEmbeddedFiles.Add(FileReference.Copy(outDoc, inFileRef));
}

private static void AddPageNumber(Document outDoc, Page outPage, Font font, int pageNumber)
{
    // Create content generator
    using ContentGenerator generator = new ContentGenerator(outPage.Content, false);

    // Create text object
    Text text = Text.Create(outDoc);

    // Create a text generator with the given font, size and position
    using (TextGenerator textgenerator = new TextGenerator(text, font, 8, null))
    {
        // Generate string to be stamped as page number
        string stampText = string.Format("Page {0}", pageNumber);

        // Calculate position for centering text at bottom of page
        Point position = new Point
        {
            X = (outPage.Size.Width / 2) - (textgenerator.GetWidth(stampText) / 2),
            Y = 10
        };

        // Position the text
        textgenerator.MoveTo(position);
        // Add page number
        textgenerator.Show(stampText);
    }
    // Paint the positioned text
    generator.PaintText(text);
}

try (// Open input document
    FileStream inStream = new FileStream(inPath, FileStream.Mode.READ_ONLY);
    Document inDoc = Document.open(inStream, null);
    FileStream outStream = new FileStream(outPath, FileStream.Mode.READ_WRITE_NEW)) {
    try (// Create output document
        Document outDoc = Document.create(outStream, inDoc.getConformance(), null)) {

        // Copy document-wide data
        copyDocumentData(inDoc, outDoc);

        // Define page copy options
        PageCopyOptions copyOptions = new PageCopyOptions();

        // Copy pages from input to output
        int pageNo = 1;

        // Create embedded font in output document
        Font font = Font.createFromSystem(outDoc, "Arial", "", true);

        // Loop through all pages of input
        for (Page inPage : inDoc.getPages()) {
            // Copy page from input to output
            Page outPage = Page.copy(outDoc, inPage, copyOptions);

            // Stamp page number on current page of output document
            applyStamps(outDoc, outPage, font, pageNo++);

            // Add page to output document
            outDoc.getPages().add(outPage);
        }
    }
}

private static void copyDocumentData(Document inDoc, Document outDoc) throws PdfToolboxException, IOException {
    // Copy document-wide data

    // Output intent
    if (inDoc.getOutputIntent() != null)
        outDoc.setOutputIntent(IccBasedColorSpace.copy(outDoc, inDoc.getOutputIntent()));

    // Metadata
    outDoc.setMetadata(Metadata.copy(outDoc, inDoc.getMetadata()));

    // Viewer settings
    outDoc.setViewerSettings(ViewerSettings.copy(outDoc, inDoc.getViewerSettings()));

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.getAssociatedFiles();
    for (FileReference inFileRef : inDoc.getAssociatedFiles())
        outAssociatedFiles.add(FileReference.copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.getPlainEmbeddedFiles();
    for (FileReference inFileRef : inDoc.getPlainEmbeddedFiles())
        outEmbeddedFiles.add(FileReference.copy(outDoc, inFileRef));
}

private static void applyStamps(Document doc, Page page, Font font, int pageNo) throws PdfToolboxException, IOException {

    try (// Create content generator
        ContentGenerator generator = new ContentGenerator(page.getContent(), false)) {
        // Create text object
        Text text = Text.create(doc);

        try (// Create a text generator with the given font, size and position
            TextGenerator textgenerator = new TextGenerator(text, font, 8, null)) {

            // Generate string to be stamped as page number
            String stampText = String.format("Page %d", pageNo);

            // Calculate position for centering text at bottom of page
            Point position = new Point((page.getSize().width / 2) - (textgenerator.getWidth(stampText) / 2), 10);

            // Position the text
            textgenerator.moveTo(position);
            // Add page number
            textgenerator.show(stampText);
        }

        // Paint the positioned text
        generator.paintText(text);
    }
}

// Open input document
pInStream = _tfopen(szInPath, _T("rb"));
GOTO_CLEANUP_IF_NULL(pInStream, _T("Failed to open input file \"%s\".\n"), szInPath);
PtxSysCreateFILEStreamDescriptor(&descriptor, pInStream, 0);
pInDoc = PtxPdf_Document_Open(&descriptor, _T(""));
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInDoc, _T("Input file \"%s\" cannot be opened. %s (ErrorCode: 0x%08x).\n"), szInPath, szErrorBuff, Ptx_GetLastError());

// Create output document
pOutStream = _tfopen(szOutPath, _T("wb+"));
GOTO_CLEANUP_IF_NULL(pOutStream, _T("Failed to open output file \"%s\".\n"), szOutPath);
PtxSysCreateFILEStreamDescriptor(&outDescriptor, pOutStream, 0);
iConformance = PtxPdf_Document_GetConformance(pInDoc);
pOutDoc = PtxPdf_Document_Create(&outDescriptor, &iConformance, NULL);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutDoc, _T("Output file \"%s\" cannot be created. %s (ErrorCode: 0x%08x).\n"), szOutPath, szErrorBuff, Ptx_GetLastError());

// Create embedded font in output document
pFont = PtxPdfContent_Font_CreateFromSystem(pOutDoc, _T("Arial"), _T(""), TRUE);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pFont, _T("Failed to create font. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Copy document-wide data
GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(copyDocumentData(pInDoc, pOutDoc), _T("Failed to copy document-wide data. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Configure copy options
pCopyOptions = PtxPdf_PageCopyOptions_New();

// Copy all pages
pInPageList = PtxPdf_Document_GetPages(pInDoc);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInPageList, _T("Failed to get the pages of the input document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
pOutPageList = PtxPdf_Document_GetPages(pOutDoc);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutPageList, _T("Failed to get the pages of the output document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
for (int iPage = 0; iPage < PtxPdf_PageList_GetCount(pInPageList); iPage++)
{
    pInPage = PtxPdf_PageList_Get(pInPageList, iPage);

    // Copy page from input to output
    pOutPage = PtxPdf_Page_Copy(pOutDoc, pInPage, pCopyOptions);
    GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutPage, _T("Failed to copy pages from input to output. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
    GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdf_Page_GetSize(pOutPage, &size), _T("Failed to get size. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

    // Stamp page number on current page of output document
    if (addPageNumber(pOutDoc, pOutPage, pFont, iPage + 1) == 1)
    {
        goto cleanup;
    }

    // Add page to output document
    GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdf_PageList_Add(pOutPageList, pOutPage), _T("Failed to add page to output document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

    if (pOutPage != NULL)
    {
        Ptx_Release(pOutPage);
        pOutPage = NULL;
    }

    if (pInPage != NULL)
    {
        Ptx_Release(pInPage);
        pInPage = NULL;
    }
}

int copyDocumentData(TPtxPdf_Document * pInDoc, TPtxPdf_Document * pOutDoc)
{
    TPtxPdf_FileReferenceList* pInFileRefList;
    TPtxPdf_FileReferenceList* pOutFileRefList;

    // Output intent
    if (PtxPdf_Document_GetOutputIntent(pInDoc) != NULL)
        if (PtxPdf_Document_SetOutputIntent(pOutDoc, PtxPdfContent_IccBasedColorSpace_Copy(pOutDoc, PtxPdf_Document_GetOutputIntent(pInDoc))) == FALSE)
            return FALSE;

    // Metadata
    if (PtxPdf_Document_SetMetadata(pOutDoc, PtxPdf_Metadata_Copy(pOutDoc, PtxPdf_Document_GetMetadata(pInDoc))) == FALSE)
        return FALSE;

    // Viewer settings
    if (PtxPdf_Document_SetViewerSettings(pOutDoc, PtxPdfNav_ViewerSettings_Copy(pOutDoc, PtxPdf_Document_GetViewerSettings(pInDoc))) == FALSE)
        return FALSE;

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    pInFileRefList = PtxPdf_Document_GetAssociatedFiles(pInDoc);
    pOutFileRefList = PtxPdf_Document_GetAssociatedFiles(pOutDoc);
    if (pInFileRefList == NULL || pOutFileRefList == NULL)
        return FALSE;
    for (int iFileRef = 0; iFileRef < PtxPdf_FileReferenceList_GetCount(pInFileRefList); iFileRef++)
        if (PtxPdf_FileReferenceList_Add(pOutFileRefList, PtxPdf_FileReference_Copy(pOutDoc, PtxPdf_FileReferenceList_Get(pInFileRefList, iFileRef))) == FALSE)
            return FALSE;

    // Plain embedded files
    pInFileRefList = PtxPdf_Document_GetPlainEmbeddedFiles(pInDoc);
    pOutFileRefList = PtxPdf_Document_GetPlainEmbeddedFiles(pOutDoc);
    if (pInFileRefList == NULL || pOutFileRefList == NULL)
        return FALSE;
    for (int iFileRef = 0; iFileRef < PtxPdf_FileReferenceList_GetCount(pInFileRefList); iFileRef++)
        if (PtxPdf_FileReferenceList_Add(pOutFileRefList, PtxPdf_FileReference_Copy(pOutDoc, PtxPdf_FileReferenceList_Get(pInFileRefList, iFileRef))) == FALSE)
            return FALSE;

    return TRUE;
}

int addPageNumber(TPtxPdf_Document* pOutDoc, TPtxPdf_Page* pOutPage, TPtxPdfContent_Font* pFont, int nPageNumber)
{
    TPtxPdfContent_Content* pContent = NULL;
    TPtxPdfContent_ContentGenerator* pGenerator = NULL;
    TPtxPdfContent_Text* pText = NULL;
    TPtxPdfContent_TextGenerator* pTextGenerator = NULL;

    pContent = PtxPdf_Page_GetContent(pOutPage);

    // Create content generator
    pGenerator = PtxPdfContent_ContentGenerator_New(pContent, FALSE);
    GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pGenerator, _T("Failed to create a content generator. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

    // Create text object
    pText = PtxPdfContent_Text_Create(pOutDoc);
    GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pText, _T("Failed to create a text object. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

    // Create a text generator with the given font, size and position
    pTextGenerator = PtxPdfContent_TextGenerator_New(pText, pFont, 8, NULL);
    GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pTextGenerator, _T("Failed to create a text generator. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

    // Generate string to be stamped as page number
    char szStampBuffer[50];
    sprintf(szStampBuffer, _T("Page %d"), nPageNumber);
    TCHAR* szStampText = szStampBuffer;

    double dTextWidth = PtxPdfContent_TextGenerator_GetWidth(pTextGenerator, szStampText);
    GOTO_CLEANUP_IF_ZERO_PRINT_ERROR(dTextWidth, _T("Failed to get text width. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

    // Calculate position
    TPtxGeomReal_Point position;
    position.dX = (size.dWidth / 2) - (dTextWidth / 2);
    position.dY = 10;

    // Move to position
    GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdfContent_TextGenerator_MoveTo(pTextGenerator, &position), _T("Failed to move to position. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
    // Add given text string
    GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdfContent_TextGenerator_ShowLine(pTextGenerator, szStampText), _T("Failed to add given text string. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

    // Close text generator
    PtxPdfContent_TextGenerator_Close(pTextGenerator);
    pTextGenerator = NULL;

    // Paint the positioned text
    GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdfContent_ContentGenerator_PaintText(pGenerator, pText), _T("Failed to paint the positioned text. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

cleanup:
    if (pTextGenerator != NULL)
        PtxPdfContent_TextGenerator_Close(pTextGenerator);
    if (pGenerator != NULL)
        PtxPdfContent_ContentGenerator_Close(pGenerator);
    if (pText != NULL)
        Ptx_Release(pText);
    if (pContent != NULL)
        Ptx_Release(pContent);

    return iReturnValue;
}

using (Stream inStream = new FileStream(inPath, FileMode.Open, FileAccess.Read))
using (Document inDoc = Document.Open(inStream, null))

// Create output document
using (Stream outStream = new FileStream(outPath, FileMode.Create, FileAccess.ReadWrite))
using (Document outDoc = Document.Create(outStream, inDoc.Conformance, null))
{
    // Copy document-wide data
    CopyDocumentData(inDoc, outDoc);

    // Copy all form fields
    FieldNodeMap inFormFields = inDoc.FormFields;
    FieldNodeMap outFormFields = outDoc.FormFields;
    foreach (KeyValuePair inPair in inFormFields)
    {
        FieldNode outFormFieldNode = FieldNode.Copy(outDoc, inPair.Value);
        outFormFields.Add(inPair.Key, outFormFieldNode);
    }

    // Define page copy options
    PageCopyOptions copyOptions = new PageCopyOptions
    {
        FormFields = FormFieldCopyStrategy.CopyAndUpdateWidgets,
        UnsignedSignatures = CopyStrategy.Remove,
    };

    // Copy first page
    Page inPage = inDoc.Pages[0];
    Page outPage = Page.Copy(outDoc, inPage, copyOptions);

    // Add different types of form fields to the output page
    AddCheckBox(outDoc, "Check Box ID", true, outPage, new Rectangle { Left = 50, Bottom = 300, Right = 70, Top = 320 });
    AddComboBox(outDoc, "Combo Box ID", new string[] { "item 1", "item 2" }, "item 1", outPage, new Rectangle { Left = 50, Bottom = 260, Right = 210, Top = 280 });
    AddListBox(outDoc, "List Box ID", new string[] { "item 1", "item 2", "item 3" }, new string[] { "item 1", "item 3" }, outPage, new Rectangle { Left = 50, Bottom = 160, Right = 210, Top = 240 });
    AddRadioButtonGroup(outDoc, "Radio Button ID", new string[] { "A", "B", "C" }, 0, outPage, new Rectangle { Left = 50, Bottom = 120, Right = 210, Top = 140 });
    AddGeneralTextField(outDoc, "Text ID", "Text", outPage, new Rectangle { Left = 50, Bottom = 80, Right = 210, Top = 100 });

    // Add page to output document
    outDoc.Pages.Add(outPage);

    // Copy remaining pages and append to output document
    PageList inPageRange = inDoc.Pages.GetRange(1, inDoc.Pages.Count - 1);
    PageList copiedPages = PageList.Copy(outDoc, inPageRange, copyOptions);
    outDoc.Pages.AddRange(copiedPages);
}

private static void CopyDocumentData(Document inDoc, Document outDoc)
{
    // Copy document-wide data

    // Output intent
    if (inDoc.OutputIntent != null)
        outDoc.OutputIntent = IccBasedColorSpace.Copy(outDoc, inDoc.OutputIntent);

    // Metadata
    outDoc.Metadata = Metadata.Copy(outDoc, inDoc.Metadata);

    // Viewer settings
    outDoc.ViewerSettings = ViewerSettings.Copy(outDoc, inDoc.ViewerSettings);

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.AssociatedFiles;
    foreach (FileReference inFileRef in inDoc.AssociatedFiles)
        outAssociatedFiles.Add(FileReference.Copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.PlainEmbeddedFiles;
    foreach (FileReference inFileRef in inDoc.PlainEmbeddedFiles)
        outEmbeddedFiles.Add(FileReference.Copy(outDoc, inFileRef));
}

private static void AddCheckBox(Document doc, string id, bool isChecked, Page page, Rectangle rectangle)
{
    // Create a check box
    CheckBox checkBox = CheckBox.Create(doc);

    // Add the check box to the document
    doc.FormFields.Add(id, checkBox);

    // Set the check box's state
    checkBox.Checked = isChecked;

    // Create a widget and add it to the page's widgets
    page.Widgets.Add(checkBox.AddNewWidget(rectangle));
}

private static void AddComboBox(Document doc, string id, string[] itemNames, string value, Page page, Rectangle rectangle)
{
    // Create a combo box
    ComboBox comboBox = ComboBox.Create(doc);

    // Add the combo box to the document
    doc.FormFields.Add(id, comboBox);

    // Loop over all given item names
    foreach (string itemName in itemNames)
    {
        // Create a new choice item
        ChoiceItem item = comboBox.AddNewItem(itemName);

        // Check whether this is the chosen item name
        if (value.Equals(itemName))
            comboBox.ChosenItem = item;
    }
    if (comboBox.ChosenItem == null && !string.IsNullOrEmpty(value))
    {
        // If no item has been chosen then assume we want to set the editable item
        comboBox.CanEdit = true;
        comboBox.EditableItemName = value;
    }

    // Create a widget and add it to the page's widgets
    page.Widgets.Add(comboBox.AddNewWidget(rectangle));
}

private static void AddListBox(Document doc, string id, string[] itemNames, string[] chosenNames, Page page, Rectangle rectangle)
{
    // Create a list box
    ListBox listBox = ListBox.Create(doc);

    // Add the list box to the document
    doc.FormFields.Add(id, listBox);

    // Allow multiple selections
    listBox.AllowMultiSelect = true;
    ChoiceItemList chosenItems = listBox.ChosenItems;

    // Loop over all given item names
    foreach (string itemName in itemNames)
    {
        // Create a new choice item
        ChoiceItem item = listBox.AddNewItem(itemName);

        // Check whether to add to the chosen items
        if (chosenNames.Contains(itemName))
            chosenItems.Add(item);
    }

    // Create a widget and add it to the page's widgets
    page.Widgets.Add(listBox.AddNewWidget(rectangle));
}

private static void AddRadioButtonGroup(Document doc, string id, string[] buttonNames, int chosen, Page page, Rectangle rectangle)
{
    // Create a radio button group
    RadioButtonGroup group = RadioButtonGroup.Create(doc);

    // Get the page's widgets
    WidgetList widgets = page.Widgets;

    // Add the radio button group to the document
    doc.FormFields.Add(id, group);

    // We partition the given rectangle horizontally into sub-rectangles, one for each button
    // Compute the width of the sub-rectangles
    double buttonWidth = (rectangle.Right - rectangle.Left) / buttonNames.Length;

    // Loop over all button names
    for (int i = 0; i < buttonNames.Length; i++)
    {
        // Compute the sub-rectangle for this button
        Rectangle buttonRectangle = new Rectangle()
        {
            Left = rectangle.Left + i * buttonWidth,
            Bottom = rectangle.Bottom,
            Right = rectangle.Left + (i + 1) * buttonWidth,
            Top = rectangle.Top
        };

        // Create the button and an associated widget
        RadioButton button = group.AddNewButton(buttonNames[i]);
        Widget widget = button.AddNewWidget(buttonRectangle);

        // Check if this is the chosen button
        if (i == chosen)
            group.ChosenButton = button;

        // Add the widget to the page's widgets
        widgets.Add(widget);
    }
}

private static void AddGeneralTextField(Document doc, string id, string value, Page page, Rectangle rectangle)
{
    // Create a general text field
    GeneralTextField field = GeneralTextField.Create(doc);

    // Add the field to the document
    doc.FormFields.Add(id, field);

    // Set the text value
    field.Text = value;

    // Create a widget and add it to the page's widgets
    page.Widgets.Add(field.AddNewWidget(rectangle));
}

try (// Open input document
    FileStream inStream = new FileStream(inPath, FileStream.Mode.READ_ONLY);
    Document inDoc = Document.open(inStream, null);
    FileStream outStream = new FileStream(outPath, FileStream.Mode.READ_WRITE_NEW)) {
    try (// Create output document
        Document outDoc = Document.create(outStream, inDoc.getConformance(), null)) {

        // Copy document-wide data
        copyDocumentData(inDoc, outDoc);

        // Copy all form fields
        FieldNodeMap inFormFields = inDoc.getFormFields();
        FieldNodeMap outFormFields = outDoc.getFormFields();
        for (Entry entry : inFormFields.entrySet())
            outFormFields.put(entry.getKey(), FieldNode.copy(outDoc, entry.getValue()));

        // Define page copy options
        PageCopyOptions copyOptions = new PageCopyOptions();
        copyOptions.setFormFields(FormFieldCopyStrategy.COPY_AND_UPDATE_WIDGETS);
        copyOptions.setUnsignedSignatures(CopyStrategy.REMOVE);

        // Copy first page
        Page inPage = inDoc.getPages().get(0);
        Page outPage = Page.copy(outDoc, inPage, copyOptions);

        // Add different types of form fields to the output page
        addCheckBox(outDoc, "Check Box ID", true, outPage, new Rectangle(50, 300, 70, 320));
        addComboBox(outDoc, "Combo Box ID", new String[] { "item 1", "item 2" }, "item 1", outPage,
                new Rectangle(50, 260, 210, 280));
        addListBox(outDoc, "List Box ID", new String[] { "item 1", "item 2", "item 3" },
                new String[] { "item 1", "item 3" }, outPage, new Rectangle(50, 160, 210, 240));
        addRadioButtonGroup(outDoc, "Radio Button ID", new String[] { "A", "B", "C" }, 0, outPage,
                new Rectangle(50, 120, 210, 140));
        addGeneralTextField(outDoc, "Text ID", "Text", outPage, new Rectangle(50, 80, 210, 100));

        // Add page to output document
        outDoc.getPages().add(outPage);

        // Copy remaining pages and append to output document
        PageList inPageRange = inDoc.getPages().subList(1, inDoc.getPages().size());
        PageList copiedPages = PageList.copy(outDoc, inPageRange, copyOptions);
        outDoc.getPages().addAll(copiedPages);
    }
}

private static void copyDocumentData(Document inDoc, Document outDoc) throws PdfToolboxException, IOException {
    // Copy document-wide data

    // Output intent
    if (inDoc.getOutputIntent() != null)
        outDoc.setOutputIntent(IccBasedColorSpace.copy(outDoc, inDoc.getOutputIntent()));

    // Metadata
    outDoc.setMetadata(Metadata.copy(outDoc, inDoc.getMetadata()));

    // Viewer settings
    outDoc.setViewerSettings(ViewerSettings.copy(outDoc, inDoc.getViewerSettings()));

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.getAssociatedFiles();
    for (FileReference inFileRef : inDoc.getAssociatedFiles())
        outAssociatedFiles.add(FileReference.copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.getPlainEmbeddedFiles();
    for (FileReference inFileRef : inDoc.getPlainEmbeddedFiles())
        outEmbeddedFiles.add(FileReference.copy(outDoc, inFileRef));
}

private static void addCheckBox(Document doc, String id, boolean isChecked, Page page, Rectangle rectangle)
        throws PdfToolboxException {
    // Create a check box
    CheckBox checkBox = CheckBox.create(doc);

    // Add the check box to the document
    doc.getFormFields().put(id, checkBox);

    // Set the check box's state
    checkBox.setChecked(isChecked);

    // Create a widget and add it to the page's widgets
    page.getWidgets().add(checkBox.addNewWidget(rectangle));
}

private static void addListBox(Document doc, String id, String[] itemNames, String[] chosenNames, Page page,
        Rectangle rectangle) throws PdfToolboxException {
    List chosenNamesList = Arrays.asList(chosenNames);

    // Create a list box
    ListBox listBox = ListBox.create(doc);

    // Add the list box to the document
    doc.getFormFields().put(id, listBox);

    // Allow multiple selections
    listBox.setAllowMultiSelect(true);

    // Get the list of chosen items
    ChoiceItemList chosenItems = listBox.getChosenItems();

    // Loop over all given item names
    for (String itemName : itemNames) {
        ChoiceItem item = listBox.addNewItem(itemName);
        // Check whether to add to the chosen items
        if (chosenNamesList.contains(itemName))
            chosenItems.add(item);
    }

    // Create a widget and add it to the page's widgets
    page.getWidgets().add(listBox.addNewWidget(rectangle));
}

private static void addComboBox(Document doc, String id, String[] itemNames, String value, Page page,
        Rectangle rectangle) throws PdfToolboxException {
    // Create a combo box
    ComboBox comboBox = ComboBox.create(doc);

    // Add the combo box to the document
    doc.getFormFields().put(id, comboBox);

    // Loop over all given item names
    for (String itemName : itemNames) {
        ChoiceItem item = comboBox.addNewItem(itemName);
        // Check whether to add to the chosen items
        if (value.equals(itemName))
            comboBox.setChosenItem(item);
    }
    if (comboBox.getChosenItem() == null && !(value == null || value.isEmpty())) {
        // If no item has been chosen then assume we want to set the editable item
        comboBox.setCanEdit(true);
        comboBox.setEditableItemName(value);
    }

    // Create a widget and add it to the page's widgets
    page.getWidgets().add(comboBox.addNewWidget(rectangle));
}

private static void addRadioButtonGroup(Document doc, String id, String[] buttonNames, int chosen, Page page,
        Rectangle rectangle) throws PdfToolboxException {
    // Create a radio button group
    RadioButtonGroup group = RadioButtonGroup.create(doc);

    // Add the radio button group to the document
    doc.getFormFields().put(id, group);

    // We partition the given rectangle horizontally into sub-rectangles, one for
    // each button
    // Compute the width of the sub-rectangles
    double buttonWidth = (rectangle.right - rectangle.left) / buttonNames.length;

    // Get the page's widgets
    WidgetList widgets = page.getWidgets();

    // Loop over all button names
    for (int i = 0; i < buttonNames.length; i++) {
        // Compute the sub-rectangle for this button
        Rectangle buttonRectangle = new Rectangle(rectangle.left + i * buttonWidth, rectangle.bottom,
                rectangle.left + (i + 1) * buttonWidth, rectangle.top);

        // Create the button and an associated widget
        RadioButton button = group.addNewButton(buttonNames[i]);
        Widget widget = button.addNewWidget(buttonRectangle);

        // Check if this is the chosen button
        if (i == chosen)
            group.setChosenButton(button);

        // Add the widget to the page's widgets
        widgets.add(widget);
    }
}

private static void addGeneralTextField(Document doc, String id, String value, Page page, Rectangle rectangle)
        throws PdfToolboxException {
    // Create a general text field
    GeneralTextField field = GeneralTextField.create(doc);

    // Add the field to the document
    doc.getFormFields().put(id, field);

    // Set the check box's state
    field.setText(value);

    // Create a widget and add it to the page's widgets
    page.getWidgets().add(field.addNewWidget(rectangle));
}

// Open input document
using (Stream inStream = new FileStream(inPath, FileMode.Open, FileAccess.Read))
using (Document inDoc = Document.Open(inStream, null))

// Create output document
using (Stream outStream = new FileStream(outPath, FileMode.Create, FileAccess.ReadWrite))
using (Document outDoc = Document.Create(outStream, inDoc.Conformance, null))
{
    // Copy document-wide data
    CopyDocumentData(inDoc, outDoc);

    FieldNodeMap outFields = outDoc.FormFields;

    // Copy all form fields
    FieldNodeMap inFields = inDoc.FormFields;
    foreach (var inPair in inFields)
    {
        FieldNode inFieldNode = inPair.Value;
        FieldNode outFormFieldNode = FieldNode.Copy(outDoc, inFieldNode);
        outFields.Add(inPair.Key, outFormFieldNode);
    }

    // Find the given field, exception thrown if not found
    var selectedNode = outFields.Lookup(fieldIdentifier);
    if (selectedNode is Field selectedField)
        FillFormField(selectedField, fieldValue);

    // Configure copying options for updating existing widgets and removing signature fields
    PageCopyOptions copyOptions = new PageCopyOptions
    {
        FormFields = FormFieldCopyStrategy.CopyAndUpdateWidgets,
        UnsignedSignatures = CopyStrategy.Remove,
    };

    // Copy all pages and append to output document
    PageList copiedPages = PageList.Copy(outDoc, inDoc.Pages, copyOptions);
    outDoc.Pages.AddRange(copiedPages);
}

private static void CopyDocumentData(Document inDoc, Document outDoc)
{
    // Copy document-wide data

    // Output intent
    if (inDoc.OutputIntent != null)
        outDoc.OutputIntent = IccBasedColorSpace.Copy(outDoc, inDoc.OutputIntent);

    // Metadata
    outDoc.Metadata = Metadata.Copy(outDoc, inDoc.Metadata);

    // Viewer settings
    outDoc.ViewerSettings = ViewerSettings.Copy(outDoc, inDoc.ViewerSettings);

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.AssociatedFiles;
    foreach (FileReference inFileRef in inDoc.AssociatedFiles)
        outAssociatedFiles.Add(FileReference.Copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.PlainEmbeddedFiles;
    foreach (FileReference inFileRef in inDoc.PlainEmbeddedFiles)
        outEmbeddedFiles.Add(FileReference.Copy(outDoc, inFileRef));
}

static void FillFormField(Field formField, string value)
{
    // Apply the value, depending on the field type
    if (formField is TextField textField)
    {
        // Set the text
        textField.Text = value;
    }
    else if (formField is CheckBox checkBox)
    {
        // Check or un-check
        checkBox.Checked = "on".Equals(value, StringComparison.CurrentCultureIgnoreCase);
    }
    else if (formField is RadioButtonGroup group)
    {
        // Search the buttons for given name
        foreach (var button in group.Buttons)
        {
            if (value.Equals(button.ExportName))
            {
                // Found: Select this button
                group.ChosenButton = button;
                break;
            }
        }
    }
    else if (formField is ComboBox comboBox)
    {
        // Search for the given item
        foreach (var item in comboBox.Items)
        {
            if (value.Equals(item.DisplayName))
            {
                // Found: Select this item.
                comboBox.ChosenItem = item;
                break;
            }
        }
    }
    else if (formField is ListBox listBox)
    {
        // Search for the given item
        foreach (var item in listBox.Items)
        {
            if (value.Equals(item.DisplayName))
            {
                // Found: Set this item as the only selected item
                var itemList = listBox.ChosenItems;
                itemList.Clear();
                itemList.Add(item);
                break;
            }
        }
    }
}

try (// Open input document
    FileStream inStream = new FileStream(inPath, FileStream.Mode.READ_ONLY);
    Document inDoc = Document.open(inStream, null);
    FileStream outStream = new FileStream(outPath, FileStream.Mode.READ_WRITE_NEW)) {
    try (// Create output document
        Document outDoc = Document.create(outStream, inDoc.getConformance(), null)) {

        // Copy document-wide data
        copyDocumentData(inDoc, outDoc);

        // Copy all form fields
        FieldNodeMap inFormFields = inDoc.getFormFields();
        FieldNodeMap outFormFields = outDoc.getFormFields();
        for (Entry entry : inFormFields.entrySet())
            outFormFields.put(entry.getKey(), FieldNode.copy(outDoc, entry.getValue()));

        // Find the given field, exception thrown if not found
        Field selectedField = (Field) outFormFields.lookup(fieldIdentifier);
        fillFormField(selectedField, fieldValue);

        // Configure copying options for updating existing widgets and removing signature fields
        PageCopyOptions copyOptions = new PageCopyOptions();
        copyOptions.setFormFields(FormFieldCopyStrategy.COPY_AND_UPDATE_WIDGETS);
        copyOptions.setUnsignedSignatures(CopyStrategy.REMOVE);

        // Copy all pages and append to output document
        PageList copiedPages = PageList.copy(outDoc, inDoc.getPages(), copyOptions);
        outDoc.getPages().addAll(copiedPages);
    }
}

private static void copyDocumentData(Document inDoc, Document outDoc) throws PdfToolboxException, IOException {
    // Copy document-wide data

    // Output intent
    if (inDoc.getOutputIntent() != null)
        outDoc.setOutputIntent(IccBasedColorSpace.copy(outDoc, inDoc.getOutputIntent()));

    // Metadata
    outDoc.setMetadata(Metadata.copy(outDoc, inDoc.getMetadata()));

    // Viewer settings
    outDoc.setViewerSettings(ViewerSettings.copy(outDoc, inDoc.getViewerSettings()));

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.getAssociatedFiles();
    for (FileReference inFileRef : inDoc.getAssociatedFiles())
        outAssociatedFiles.add(FileReference.copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.getPlainEmbeddedFiles();
    for (FileReference inFileRef : inDoc.getPlainEmbeddedFiles())
        outEmbeddedFiles.add(FileReference.copy(outDoc, inFileRef));
}

private static void fillFormField(Field formField, String value) throws PdfToolboxException {
    // Apply the value, depending on the field type
    if (formField instanceof TextField) {
        // Set the text
        TextField textField = (TextField) formField;
        textField.setText(value);
    } else if (formField instanceof CheckBox) {
        // Check or un-check
        CheckBox checkBox = (CheckBox) formField;
        checkBox.setChecked(value.equalsIgnoreCase("on"));
    } else if (formField instanceof RadioButtonGroup) {
        // Search the buttons for given name
        RadioButtonGroup group = (RadioButtonGroup) formField;
        for (RadioButton button : group.getButtons()) {
            if (value.equals(button.getExportName())) {
                // Found: Select this button
                group.setChosenButton(button);
                break;
            }
        }
    } else if (formField instanceof ComboBox) {
        // Search for the given item
        ComboBox comboBox = (ComboBox) formField;
        for (ChoiceItem item : comboBox.getItems()) {
            if (value.equals(item.getDisplayName())) {
                // Found: Select this item
                comboBox.setChosenItem(item);
                break;
            }
        }
    } else if (formField instanceof ListBox) {
        // Search for the given item
        ListBox listBox = (ListBox) formField;
        for (ChoiceItem item : listBox.getItems()) {
            if (value.equals(item.getDisplayName())) {
                // Found: Set this item as the only selected item
                ChoiceItemList itemList = listBox.getChosenItems();
                itemList.clear();
                itemList.add(item);
                break;
            }
        }
    }
}

// Open input document 
using (Stream inStream = new FileStream(inPath, FileMode.Open, FileAccess.Read))
using (Document inDoc = Document.Open(inStream, null))

// Create output document
using (Stream outStream = new FileStream(outPath, FileMode.Create, FileAccess.ReadWrite))
using (Document outDoc = Document.Create(outStream, inDoc.Conformance, null))
{
    // Copy document-wide data
    CopyDocumentData(inDoc, outDoc);

    // Set Metadata
    if (args.Length == 3)
    {
        Metadata mdata;

        // Add metadata from a input file 
        using FileStream metaStream = File.OpenRead(mdatafile);
        if (mdatafile.EndsWith(".pdf"))
        {
            // Use the metadata of another PDF file
            Document metaDoc = Document.Open(metaStream, "");
            mdata = Metadata.Copy(outDoc, metaDoc.Metadata);
        }
        else
        {
            // Use the content of an XMP metadata file 
            mdata = Metadata.Create(outDoc, metaStream);
        }
        outDoc.Metadata = mdata;
    }
    else
    {
        // Set some metadata properties 
        Metadata metadata = outDoc.Metadata;
        metadata.Author = "Your Author";
        metadata.Title = "Your Title";
        metadata.Subject = "Your Subject";
        metadata.Creator = "Your Creator";
    }

    // Define page copy options
    PageCopyOptions copyOptions = new PageCopyOptions();

    // Copy all pages and append to output document
    PageList copiedPages = PageList.Copy(outDoc, inDoc.Pages, copyOptions);
    outDoc.Pages.AddRange(copiedPages);
}

private static void CopyDocumentData(Document inDoc, Document outDoc)
{
    // Copy document-wide data (except metadata)

    // Output intent
    if (inDoc.OutputIntent != null)
        outDoc.OutputIntent = IccBasedColorSpace.Copy(outDoc, inDoc.OutputIntent);

    // Viewer settings
    outDoc.ViewerSettings = ViewerSettings.Copy(outDoc, inDoc.ViewerSettings);

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.AssociatedFiles;
    foreach (FileReference inFileRef in inDoc.AssociatedFiles)
        outAssociatedFiles.Add(FileReference.Copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.PlainEmbeddedFiles;
    foreach (FileReference inFileRef in inDoc.PlainEmbeddedFiles)
        outEmbeddedFiles.Add(FileReference.Copy(outDoc, inFileRef));
}

try (// Open input document
    FileStream inStream = new FileStream(inPath, FileStream.Mode.READ_ONLY);
    Document inDoc = Document.open(inStream, null);
    FileStream outStream = new FileStream(outPath, FileStream.Mode.READ_WRITE_NEW)) {
    try (// Create output document
        Document outDoc = Document.create(outStream, inDoc.getConformance(), null)) {

        // Copy document-wide data
        copyDocumentData(inDoc, outDoc);

        // Define page copy options
        PageCopyOptions copyOptions = new PageCopyOptions();

        // Copy all pages and append to output document
        PageList copiedPages = PageList.copy(outDoc, inDoc.getPages(), copyOptions);
        outDoc.getPages().addAll(copiedPages);

        if (args.length == 3) {
            Metadata mdata;

            // Add metadata from a input file
            FileStream metaStream = new FileStream(mdatafile, FileStream.Mode.READ_ONLY);

            if (mdatafile.toLowerCase().endsWith(".pdf")) {
                // Use the metadata of another PDF file
                Document metaDoc = Document.open(metaStream, null);
                mdata = Metadata.copy(outDoc, metaDoc.getMetadata());
            } else {
                // Use the content of an XMP metadata file
                mdata = Metadata.create(outDoc, metaStream);
            }
            outDoc.setMetadata(mdata);
        } else {
            // Set some metadata properties
            Metadata metadata = outDoc.getMetadata();
            metadata.setAuthor("Your Author");
            metadata.setTitle("Your Title");
            metadata.setSubject("Your Subject");
            metadata.setCreator("Your Creator");
        }
    }
}

private static void copyDocumentData(Document inDoc, Document outDoc) throws PdfToolboxException, IOException {
    // Copy document-wide data (excluding metadata)

    // Output intent
    if (inDoc.getOutputIntent() != null)
        outDoc.setOutputIntent(IccBasedColorSpace.copy(outDoc, inDoc.getOutputIntent()));

    // Viewer settings
    outDoc.setViewerSettings(ViewerSettings.copy(outDoc, inDoc.getViewerSettings()));

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.getAssociatedFiles();
    for (FileReference inFileRef : inDoc.getAssociatedFiles())
        outAssociatedFiles.add(FileReference.copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.getPlainEmbeddedFiles();
    for (FileReference inFileRef : inDoc.getPlainEmbeddedFiles())
        outEmbeddedFiles.add(FileReference.copy(outDoc, inFileRef));
}

// Open input document
pInStream = _tfopen(szInPath, _T("rb"));
GOTO_CLEANUP_IF_NULL(pInStream, _T("Failed to open input file \"%s\".\n"), szInPath);
PtxSysCreateFILEStreamDescriptor(&descriptor, pInStream, 0);
pInDoc = PtxPdf_Document_Open(&descriptor, _T(""));
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInDoc, _T("Input file \"%s\" cannot be opened. %s (ErrorCode: 0x%08x).\n"), szInPath, szErrorBuff, Ptx_GetLastError());

// Create output document
pOutStream = _tfopen(szOutPath, _T("wb+"));
GOTO_CLEANUP_IF_NULL(pOutStream, _T("Failed to open output file \"%s\".\n"), szOutPath);
PtxSysCreateFILEStreamDescriptor(&outDescriptor, pOutStream, 0);
iConformance = PtxPdf_Document_GetConformance(pInDoc);
pOutDoc = PtxPdf_Document_Create(&outDescriptor, &iConformance, NULL);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutDoc, _T("Output file \"%s\" cannot be created. %s (ErrorCode: 0x%08x).\n"), szOutPath, szErrorBuff, Ptx_GetLastError());

// Copy document-wide data
GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(copyDocumentData(pInDoc, pOutDoc), _T("Failed to copy document-wide data. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Configure copy options
pCopyOptions = PtxPdf_PageCopyOptions_New();

// Copy all pages
pInPageList = PtxPdf_Document_GetPages(pInDoc);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInPageList, _T("Failed to get pages of the input document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
pCopiedPages = PtxPdf_PageList_Copy(pOutDoc, pInPageList, pCopyOptions);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pCopiedPages, _T("Failed to copy pages. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Add copied pages to output
pOutPageList = PtxPdf_Document_GetPages(pOutDoc);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutPageList, _T("Failed to get pages of the output document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdf_PageList_AddRange(pOutPageList, pCopiedPages), _T("Failed to add copied pages to output. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

if (argc == 4)
{
    // Add metadata from a input file
    pMdataStream = _tfopen(szMdatafile, _T("rb"));
    GOTO_CLEANUP_IF_NULL(pMdataStream, _T("Failed to open metadata file \"%s\".\n"), szMdatafile);
    PtxSysCreateFILEStreamDescriptor(&mdataDescriptor, pMdataStream, 0);

    // Get file extension
    TCHAR* szExt = _tcsrchr(szMdatafile, '.');
    _tcscpy(szExtension, szExt);

    if (_tcscmp(szExtension, _T(".pdf")) == 0)
    {
        // Use the metadata of another PDF file
        TPtxPdf_Document* pMetaDoc = PtxPdf_Document_Open(&mdataDescriptor, _T(""));
        GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pMetaDoc, _T("Failed to open metadata file. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
        TPtxPdf_Metadata* pMetadata = PtxPdf_Metadata_Copy(pOutDoc, PtxPdf_Document_GetMetadata(pMetaDoc));
        GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pMetadata, _T("Failed to copy metadata. %s (ErrorCode: 0x%08x)."), szErrorBuff, Ptx_GetLastError());
        GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdf_Document_SetMetadata(pOutDoc, pMetadata), _T("Failed to set metadata. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
    }
    else
    {
        // Use the content of an XMP metadata file 
        GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdf_Document_SetMetadata(pOutDoc, PtxPdf_Metadata_Create(pOutDoc, &mdataDescriptor)), _T("Failed to set metadata. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
    }
}
else
{
    // Set some metadata properties
    TPtxPdf_Metadata* pMetadata = PtxPdf_Document_GetMetadata(pOutDoc);
    GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pMetadata, _T("Failed to get metadata. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
    GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdf_Metadata_SetAuthor(pMetadata, _T("Your Author")), _T("%s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
    GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdf_Metadata_SetTitle(pMetadata, _T("Your Title")), _T("%s(ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
    GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdf_Metadata_SetSubject(pMetadata, _T("Your Subject")), _T("%s(ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
    GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdf_Metadata_SetCreator(pMetadata, _T("Your Creator")), _T("%s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
}

int copyDocumentData(TPtxPdf_Document * pInDoc, TPtxPdf_Document * pOutDoc)
{
    // Copy document-wide data (excluding metadata)

    TPtxPdf_FileReferenceList* pInFileRefList;
    TPtxPdf_FileReferenceList* pOutFileRefList;

    // Output intent
    if (PtxPdf_Document_GetOutputIntent(pInDoc) != NULL)
        if (PtxPdf_Document_SetOutputIntent(pOutDoc, PtxPdfContent_IccBasedColorSpace_Copy(pOutDoc, PtxPdf_Document_GetOutputIntent(pInDoc))) == FALSE)
            return FALSE;

    // Viewer settings
    if (PtxPdf_Document_SetViewerSettings(pOutDoc, PtxPdfNav_ViewerSettings_Copy(pOutDoc, PtxPdf_Document_GetViewerSettings(pInDoc))) == FALSE)
        return FALSE;

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    pInFileRefList = PtxPdf_Document_GetAssociatedFiles(pInDoc);
    pOutFileRefList = PtxPdf_Document_GetAssociatedFiles(pOutDoc);
    if (pInFileRefList == NULL || pOutFileRefList == NULL)
        return FALSE;
    for (int iFileRef = 0; iFileRef < PtxPdf_FileReferenceList_GetCount(pInFileRefList); iFileRef++)
        if (PtxPdf_FileReferenceList_Add(pOutFileRefList, PtxPdf_FileReference_Copy(pOutDoc, PtxPdf_FileReferenceList_Get(pInFileRefList, iFileRef))) == FALSE)
            return FALSE;

    // Plain embedded files
    pInFileRefList = PtxPdf_Document_GetPlainEmbeddedFiles(pInDoc);
    pOutFileRefList = PtxPdf_Document_GetPlainEmbeddedFiles(pOutDoc);
    if (pInFileRefList == NULL || pOutFileRefList == NULL)
        return FALSE;
    for (int iFileRef = 0; iFileRef < PtxPdf_FileReferenceList_GetCount(pInFileRefList); iFileRef++)
        if (PtxPdf_FileReferenceList_Add(pOutFileRefList, PtxPdf_FileReference_Copy(pOutDoc, PtxPdf_FileReferenceList_Get(pInFileRefList, iFileRef))) == FALSE)
            return FALSE;

    return TRUE;
}

// Create encryption parameters
Encryption encryptionParams = new Encryption(UserPwd, OwnerPwd, Permission.Print | 
    Permission.DigitalPrint);

// Open input document
using (Stream inStream = new FileStream(inPath, FileMode.Open, FileAccess.Read))
using (Document inDoc = Document.Open(inStream, null))

// Create output document and set a user and owner password
using (Stream outStream = new FileStream(outPath, FileMode.Create, FileAccess.ReadWrite))
using (Document outDoc = Document.Create(outStream, inDoc.Conformance, encryptionParams))
{
    // Copy document-wide data
    CopyDocumentData(inDoc, outDoc);

    // Define page copy options
    PageCopyOptions copyOptions = new PageCopyOptions();

    // Copy all pages and append to output document
    PageList copiedPages = PageList.Copy(outDoc, inDoc.Pages, copyOptions);
    outDoc.Pages.AddRange(copiedPages);
}

private static void CopyDocumentData(Document inDoc, Document outDoc)
{
    // Copy document-wide data

    // Output intent
    if (inDoc.OutputIntent != null)
        outDoc.OutputIntent = IccBasedColorSpace.Copy(outDoc, inDoc.OutputIntent);

    // Metadata
    outDoc.Metadata = Metadata.Copy(outDoc, inDoc.Metadata);

    // Viewer settings
    outDoc.ViewerSettings = ViewerSettings.Copy(outDoc, inDoc.ViewerSettings);

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.AssociatedFiles;
    foreach (FileReference inFileRef in inDoc.AssociatedFiles)
        outAssociatedFiles.Add(FileReference.Copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.PlainEmbeddedFiles;
    foreach (FileReference inFileRef in inDoc.PlainEmbeddedFiles)
        outEmbeddedFiles.Add(FileReference.Copy(outDoc, inFileRef));
}

// Create encryption parameters
Encryption encryptionParams = new Encryption(userPwd, ownerPwd,
        EnumSet.of(Permission.PRINT, Permission.DIGITAL_PRINT));

try (// Open input document
    FileStream inStream = new FileStream(inPath, FileStream.Mode.READ_ONLY);
    Document inDoc = Document.open(inStream, null);
    FileStream outStream = new FileStream(outPath, FileStream.Mode.READ_WRITE_NEW)) {
    try (// Create output document and set a user and owner password
        Document outDoc = Document.create(outStream, inDoc.getConformance(), encryptionParams)) {

        // Copy document-wide data
        copyDocumentData(inDoc, outDoc);

        // Define page copy options
        PageCopyOptions copyOptions = new PageCopyOptions();

        // Copy all pages and append to output document
        PageList copiedPages = PageList.copy(outDoc, inDoc.getPages(), copyOptions);
        outDoc.getPages().addAll(copiedPages);
    }
}

private static void copyDocumentData(Document inDoc, Document outDoc) throws PdfToolboxException, IOException {
    // Copy document-wide data

    // Output intent
    if (inDoc.getOutputIntent() != null)
        outDoc.setOutputIntent(IccBasedColorSpace.copy(outDoc, inDoc.getOutputIntent()));

    // Metadata
    outDoc.setMetadata(Metadata.copy(outDoc, inDoc.getMetadata()));

    // Viewer settings
    outDoc.setViewerSettings(ViewerSettings.copy(outDoc, inDoc.getViewerSettings()));

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.getAssociatedFiles();
    for (FileReference inFileRef : inDoc.getAssociatedFiles())
        outAssociatedFiles.add(FileReference.copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.getPlainEmbeddedFiles();
    for (FileReference inFileRef : inDoc.getPlainEmbeddedFiles())
        outEmbeddedFiles.add(FileReference.copy(outDoc, inFileRef));
}

// Open input document
pInStream = _tfopen(szInPath, _T("rb"));
GOTO_CLEANUP_IF_NULL(pInStream, _T("Failed to open input file \"%s\".\n"), szInPath);
PtxSysCreateFILEStreamDescriptor(&descriptor, pInStream, 0);
pInDoc = PtxPdf_Document_Open(&descriptor, _T(""));
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInDoc, _T("Input file \"%s\" cannot be opened. %s (ErrorCode: 0x%08x).\n"), szInPath, szErrorBuff, Ptx_GetLastError());

pEncryption = PtxPdf_Encryption_New(szUserPwd, szOwnerPwd, ePtxPdf_Permission_Print | ePtxPdf_Permission_DigitalPrint);

// Create output document
pOutStream = _tfopen(szOutPath, _T("wb+"));
GOTO_CLEANUP_IF_NULL(pOutStream, _T("Failed to open output file \"%s\".\n"), szOutPath);
PtxSysCreateFILEStreamDescriptor(&outDescriptor, pOutStream, 0);
iConformance = PtxPdf_Document_GetConformance(pInDoc);
pOutDoc = PtxPdf_Document_Create(&outDescriptor, &iConformance, pEncryption);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutDoc, _T("Output file \"%s\" cannot be created. %s (ErrorCode: 0x%08x).\n"), szOutPath, szErrorBuff, Ptx_GetLastError());

// Copy document-wide data
GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(copyDocumentData(pInDoc, pOutDoc), _T("Failed to copy document-wide data. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Configure copy options
pCopyOptions = PtxPdf_PageCopyOptions_New();

// Copy all pages
pInPageList = PtxPdf_Document_GetPages(pInDoc);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInPageList, _T("Failed to get pages of the input document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
pCopiedPages = PtxPdf_PageList_Copy(pOutDoc, pInPageList, pCopyOptions);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pCopiedPages, _T("Failed to copy pages. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Add copied pages to output
pOutPageList = PtxPdf_Document_GetPages(pOutDoc);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutPageList, _T("Failed to get pages of the output document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdf_PageList_AddRange(pOutPageList, pCopiedPages), _T("Failed to add copied pages to output. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

int copyDocumentData(TPtxPdf_Document * pInDoc, TPtxPdf_Document * pOutDoc)
{
    TPtxPdf_FileReferenceList* pInFileRefList;
    TPtxPdf_FileReferenceList* pOutFileRefList;

    // Output intent
    if (PtxPdf_Document_GetOutputIntent(pInDoc) != NULL)
        if (PtxPdf_Document_SetOutputIntent(pOutDoc, PtxPdfContent_IccBasedColorSpace_Copy(pOutDoc, PtxPdf_Document_GetOutputIntent(pInDoc))) == FALSE)
            return FALSE;

    // Metadata
    if (PtxPdf_Document_SetMetadata(pOutDoc, PtxPdf_Metadata_Copy(pOutDoc, PtxPdf_Document_GetMetadata(pInDoc))) == FALSE)
        return FALSE;

    // Viewer settings
    if (PtxPdf_Document_SetViewerSettings(pOutDoc, PtxPdfNav_ViewerSettings_Copy(pOutDoc, PtxPdf_Document_GetViewerSettings(pInDoc))) == FALSE)
        return FALSE;

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    pInFileRefList = PtxPdf_Document_GetAssociatedFiles(pInDoc);
    pOutFileRefList = PtxPdf_Document_GetAssociatedFiles(pOutDoc);
    if (pInFileRefList == NULL || pOutFileRefList == NULL)
        return FALSE;
    for (int iFileRef = 0; iFileRef < PtxPdf_FileReferenceList_GetCount(pInFileRefList); iFileRef++)
        if (PtxPdf_FileReferenceList_Add(pOutFileRefList, PtxPdf_FileReference_Copy(pOutDoc, PtxPdf_FileReferenceList_Get(pInFileRefList, iFileRef))) == FALSE)
            return FALSE;

    // Plain embedded files
    pInFileRefList = PtxPdf_Document_GetPlainEmbeddedFiles(pInDoc);
    pOutFileRefList = PtxPdf_Document_GetPlainEmbeddedFiles(pOutDoc);
    if (pInFileRefList == NULL || pOutFileRefList == NULL)
        return FALSE;
    for (int iFileRef = 0; iFileRef < PtxPdf_FileReferenceList_GetCount(pInFileRefList); iFileRef++)
        if (PtxPdf_FileReferenceList_Add(pOutFileRefList, PtxPdf_FileReference_Copy(pOutDoc, PtxPdf_FileReferenceList_Get(pInFileRefList, iFileRef))) == FALSE)
            return FALSE;

    return TRUE;
}

// Open input document
using (Stream inStream = new FileStream(inPath, FileMode.Open, FileAccess.Read))
using (Document inDoc = Document.Open(inStream, null))

// Create output document
using (Stream outStream = new FileStream(outPath, FileMode.Create, FileAccess.ReadWrite))
using (Document outDoc = Document.Create(outStream, inDoc.Conformance, null))
{
    // Copy document-wide data
    CopyDocumentData(inDoc, outDoc);

    // Define copy options including form field flattening
    PageCopyOptions copyOptions = new PageCopyOptions();
    copyOptions.FormFields = FormFieldCopyStrategy.Flatten;

    // Copy all pages and append to output document
    PageList copiedPages = PageList.Copy(outDoc, inDoc.Pages, copyOptions);
    outDoc.Pages.AddRange(copiedPages);
}

private static void CopyDocumentData(Document inDoc, Document outDoc)
{
    // Copy document-wide data

    // Output intent
    if (inDoc.OutputIntent != null)
        outDoc.OutputIntent = IccBasedColorSpace.Copy(outDoc, inDoc.OutputIntent);

    // Metadata
    outDoc.Metadata = Metadata.Copy(outDoc, inDoc.Metadata);

    // Viewer settings
    outDoc.ViewerSettings = ViewerSettings.Copy(outDoc, inDoc.ViewerSettings);

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.AssociatedFiles;
    foreach (FileReference inFileRef in inDoc.AssociatedFiles)
        outAssociatedFiles.Add(FileReference.Copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.PlainEmbeddedFiles;
    foreach (FileReference inFileRef in inDoc.PlainEmbeddedFiles)
        outEmbeddedFiles.Add(FileReference.Copy(outDoc, inFileRef));
}

try (// Open input document
    FileStream inStream = new FileStream(inPath, FileStream.Mode.READ_ONLY);
    Document inDoc = Document.open(inStream, null);
    FileStream outStream = new FileStream(outPath, FileStream.Mode.READ_WRITE_NEW)) {
    try (// Create output document
        Document outDoc = Document.create(outStream, inDoc.getConformance(), null)) {

        // Copy document-wide data
        copyDocumentData(inDoc, outDoc);

        // Define copy options including form field flattening
        PageCopyOptions copyOptions = new PageCopyOptions();
        copyOptions.setFormFields(FormFieldCopyStrategy.FLATTEN);

        // Copy all pages and append to output document
        PageList copiedPages = PageList.copy(outDoc, inDoc.getPages(), copyOptions);
        outDoc.getPages().addAll(copiedPages);
    }
}

private static void copyDocumentData(Document inDoc, Document outDoc) throws PdfToolboxException, IOException {
    // Copy document-wide data

    // Output intent
    if (inDoc.getOutputIntent() != null)
        outDoc.setOutputIntent(IccBasedColorSpace.copy(outDoc, inDoc.getOutputIntent()));

    // Metadata
    outDoc.setMetadata(Metadata.copy(outDoc, inDoc.getMetadata()));

    // Viewer settings
    outDoc.setViewerSettings(ViewerSettings.copy(outDoc, inDoc.getViewerSettings()));

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.getAssociatedFiles();
    for (FileReference inFileRef : inDoc.getAssociatedFiles())
        outAssociatedFiles.add(FileReference.copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.getPlainEmbeddedFiles();
    for (FileReference inFileRef : inDoc.getPlainEmbeddedFiles())
        outEmbeddedFiles.add(FileReference.copy(outDoc, inFileRef));
}

// Open input document
pInStream = _tfopen(szInPath, _T("rb"));
GOTO_CLEANUP_IF_NULL(pInStream, _T("Failed to open input file \"%s\".\n"), szInPath);
PtxSysCreateFILEStreamDescriptor(&descriptor, pInStream, 0);
pInDoc = PtxPdf_Document_Open(&descriptor, _T(""));
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInDoc, _T("Input file \"%s\" cannot be opened. %s (ErrorCode: 0x%08x).\n"), szInPath, szErrorBuff, Ptx_GetLastError());

// Create output document
pOutStream = _tfopen(szOutPath, _T("wb+"));
GOTO_CLEANUP_IF_NULL(pOutStream, _T("Failed to open output file \"%s\".\n"), szOutPath);
PtxSysCreateFILEStreamDescriptor(&outDescriptor, pOutStream, 0);
iConformance = PtxPdf_Document_GetConformance(pInDoc);
pOutDoc = PtxPdf_Document_Create(&outDescriptor, &iConformance, NULL);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutDoc, _T("Output file \"%s\" cannot be created. %s (ErrorCode: 0x%08x).\n"), szOutPath, szErrorBuff, Ptx_GetLastError());

// Copy document-wide data
GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(copyDocumentData(pInDoc, pOutDoc), _T("Failed to copy document-wide data. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Configure copy options: enable form field flattening
pCopyOptions = PtxPdf_PageCopyOptions_New();
PtxPdf_PageCopyOptions_SetFormFields(pCopyOptions, ePtxPdfForms_FormFieldCopyStrategy_Flatten);

// Copy all pages
pInPageList = PtxPdf_Document_GetPages(pInDoc);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInPageList, _T("Failed to get pages of the input document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
pCopiedPages = PtxPdf_PageList_Copy(pOutDoc, pInPageList, pCopyOptions);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pCopiedPages, _T("Failed to copy pages. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Add copied pages to output
pOutPageList = PtxPdf_Document_GetPages(pOutDoc);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutPageList, _T("Failed to get pages of the output document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdf_PageList_AddRange(pOutPageList, pCopiedPages), _T("Failed to add copied pages to output. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

int copyDocumentData(TPtxPdf_Document * pInDoc, TPtxPdf_Document * pOutDoc)
{
    TPtxPdf_FileReferenceList* pInFileRefList;
    TPtxPdf_FileReferenceList* pOutFileRefList;

    // Output intent
    if (PtxPdf_Document_GetOutputIntent(pInDoc) != NULL)
        if (PtxPdf_Document_SetOutputIntent(pOutDoc, PtxPdfContent_IccBasedColorSpace_Copy(pOutDoc, PtxPdf_Document_GetOutputIntent(pInDoc))) == FALSE)
            return FALSE;

    // Metadata
    if (PtxPdf_Document_SetMetadata(pOutDoc, PtxPdf_Metadata_Copy(pOutDoc, PtxPdf_Document_GetMetadata(pInDoc))) == FALSE)
        return FALSE;

    // Viewer settings
    if (PtxPdf_Document_SetViewerSettings(pOutDoc, PtxPdfNav_ViewerSettings_Copy(pOutDoc, PtxPdf_Document_GetViewerSettings(pInDoc))) == FALSE)
        return FALSE;

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    pInFileRefList = PtxPdf_Document_GetAssociatedFiles(pInDoc);
    pOutFileRefList = PtxPdf_Document_GetAssociatedFiles(pOutDoc);
    if (pInFileRefList == NULL || pOutFileRefList == NULL)
        return FALSE;
    for (int iFileRef = 0; iFileRef < PtxPdf_FileReferenceList_GetCount(pInFileRefList); iFileRef++)
        if (PtxPdf_FileReferenceList_Add(pOutFileRefList, PtxPdf_FileReference_Copy(pOutDoc, PtxPdf_FileReferenceList_Get(pInFileRefList, iFileRef))) == FALSE)
            return FALSE;

    // Plain embedded files
    pInFileRefList = PtxPdf_Document_GetPlainEmbeddedFiles(pInDoc);
    pOutFileRefList = PtxPdf_Document_GetPlainEmbeddedFiles(pOutDoc);
    if (pInFileRefList == NULL || pOutFileRefList == NULL)
        return FALSE;
    for (int iFileRef = 0; iFileRef < PtxPdf_FileReferenceList_GetCount(pInFileRefList); iFileRef++)
        if (PtxPdf_FileReferenceList_Add(pOutFileRefList, PtxPdf_FileReference_Copy(pOutDoc, PtxPdf_FileReferenceList_Get(pInFileRefList, iFileRef))) == FALSE)
            return FALSE;

    return TRUE;
}

// Create output document
using (Stream outStream = new FileStream(outPath, FileMode.Create, FileAccess.ReadWrite))
using (Document outDoc = Document.Create(outStream, null, null))
{
    // Create embedded font in output document 
    Font font = Font.CreateFromSystem(outDoc, "Arial", string.Empty, true);

    // Define page copy options
    PageCopyOptions pageCopyOptions = new PageCopyOptions();

    var copiedPageLists = new List>(inPaths.Length);

    // A page number counter
    int pageNumber = 2;

    // Copy all input documents pages
    foreach (string inPath in inPaths)
    {
        // Open input document
        using Stream inFs = new FileStream(inPath, FileMode.Open, FileAccess.Read);
        using Document inDoc = Document.Open(inFs, null);

        // Copy all pages and append to output document
        PageList copiedPages = PageList.Copy(outDoc, inDoc.Pages, pageCopyOptions);

        // Add page numbers to copied pages
        foreach (var copiedPage in copiedPages)
        {
            AddPageNumber(outDoc, copiedPage, font, pageNumber++);
        }

        // Create outline item
        string title = inDoc.Metadata.Title ?? System.IO.Path.GetFileNameWithoutExtension(inPath);
        copiedPageLists.Add(new Tuple(title, copiedPages));
    }

    // Create table of contents page
    var contentsPage = CreateTableOfContents(outDoc, copiedPageLists);
    AddPageNumber(outDoc, contentsPage, font, 1);

    // Add pages to the output document
    PageList outPages = outDoc.Pages;
    outPages.Add(contentsPage);
    foreach (var tuple in copiedPageLists)
    {
        outPages.AddRange(tuple.Item2);
    }

private static void AddPageNumber(Document outDoc, Page copiedPage, Font font, int pageNumber)
{
    // Create content generator
    using ContentGenerator generator = new ContentGenerator(copiedPage.Content, false);

    // Create text object
    Text text = Text.Create(outDoc);

    // Create a text generator with the given font, size and position
    using (TextGenerator textgenerator = new TextGenerator(text, font, 8, null))
    {
        // Generate string to be stamped as page number
        string stampText = string.Format("Page {0}", pageNumber);

        // Calculate position for centering text at bottom of page
        Point position = new Point
        {
            X = (copiedPage.Size.Width / 2) - (textgenerator.GetWidth(stampText) / 2),
            Y = 10
        };

        // Position the text
        textgenerator.MoveTo(position);
        // Add page number
        textgenerator.Show(stampText);
    }
    // Paint the positioned text
    generator.PaintText(text);
}

private static Page CreateTableOfContents(Document outDoc, List> copiedPageLists)
{
    // Create a new page with size equal to the first page copied
    var page = Page.Create(outDoc, copiedPageLists[0].Item2[0].Size);

    // Create a font
    var font = Font.CreateFromSystem(outDoc, "Arial", null, true);

    // Parameters for layout computation
    double border = 30;
    double textWidth = page.Size.Width - 2 * border;
    double chapterTitleSize = 24;
    double titleSize = 12;

    // The current text location
    var location = new Point() { X = border, Y = page.Size.Height - border - chapterTitleSize };

    // The page number of the current item in the table of content
    int pageNumber = 2;

    // Creat a content generator for the table of contents page
    using (var contentGenerator = new ContentGenerator(page.Content, false))
    {
        // Create a text object
        var text = Text.Create(outDoc);

        // Create a text generator to generate the table of contents. Initially, use the chapter title font size
        using (var textGenerator = new TextGenerator(text, font, chapterTitleSize, location))
        {
            // Show a chapter title
            textGenerator.ShowLine("Table of Contents");

            // Advance the vertical position
            location.Y -= 1.7 * chapterTitleSize;

            // Select the font size for an entry in the table of contents
            textGenerator.FontSize = titleSize;

            // Iterate over all copied page ranges
            foreach (var tuple in copiedPageLists)
            {
                // The title string for the current entry
                string title = tuple.Item1;

                // The page number string of the target page for this entry
                string pageNumberString = string.Format("{0}", pageNumber);

                // The width of the page number string
                double pageNumberWidth = textGenerator.GetWidth(pageNumberString);

                // Compute the number of filler dots to be displayed between the entry title and the page number
                int numberOfDots = (int)Math.Floor((textWidth - textGenerator.GetWidth(title) - pageNumberWidth) / textGenerator.GetWidth("."));

                // Move to the current location and show the entry's title and the filler dots
                textGenerator.MoveTo(location);
                textGenerator.Show(title + new string('.', numberOfDots));

                // Show the page number
                textGenerator.MoveTo(new Point() { X = page.Size.Width - border - pageNumberWidth, Y = location.Y });
                textGenerator.Show(pageNumberString);

                // Compute the rectangle for the link
                var linkRectangle = new Rectangle()
                {
                    Left = border,
                    Bottom = location.Y + font.Descent * titleSize,
                    Right = border + textWidth,
                    Top = location.Y + font.Ascent * titleSize
                };

                // Create a destination to the first page of the current page range and create a link for this destination
                var pageList = tuple.Item2;
                var targetPage = pageList[0];
                var destination = LocationZoomDestination.Create(outDoc, targetPage, 0, targetPage.Size.Height, null);
                var link = InternalLink.Create(outDoc, linkRectangle, destination);

                // Add the link to the table of contents page
                page.Links.Add(link);

                // Advance the location for the next entry
                location.Y -= 1.8 * titleSize;
                pageNumber += pageList.Count;
            }
        }

        // Paint the generated text
        contentGenerator.PaintText(text);
    }

    // Return the finished table-of-contents page
    return page;
}

try (
    // Open input document
    FileStream outStream = new FileStream(outPath, FileStream.Mode.READ_WRITE_NEW)) {
    try (// Create output document
        Document outDoc = Document.create(outStream, null, null)) {

        // Create embedded font in output document 
        Font font = Font.createFromSystem(outDoc, "Arial", "", true);

        // Configure page copy options
        PageCopyOptions copyOptions = new PageCopyOptions();

        Set> copiedPageLists = new HashSet<>(inPaths.length);

        // A page number counter
        int pageNumber = 2;


        // Copy all input documents pages
        for (String inPath : inPaths) {
            try (// Open input document
                Stream inFs = new FileStream(inPath, FileStream.Mode.READ_ONLY);
                Document inDoc = Document.open(inFs, null)) {

                // Copy all pages and append to output document
                PageList copiedPages = PageList.copy(outDoc, inDoc.getPages(), copyOptions);

                // Add page numbers to copied pages
                for ( Page copiedPage : copiedPages)
                {
                    AddPageNumber(outDoc, copiedPage, font, pageNumber++);
                }

                // Hold the file name without extension
                if (inPath == null)
                    continue;
                // Get position of last '.'.
                int pos = inPath.lastIndexOf(".");
                // If there was a '.', hold the file name only
                if (pos != -1) 
                    inPath = inPath.substring(0, pos);

                // Create outline item
                String title = (inDoc.getMetadata().getTitle() == null ? inPath : inDoc.getMetadata().getTitle());
                copiedPageLists.add(new AbstractMap.SimpleEntry(title, copiedPages));
            }
        }

        // Create table of contents page
        Page contentsPage = CreateTableOfContents(outDoc, copiedPageLists);
        AddPageNumber(outDoc, contentsPage, font, 1);

        // Add pages to the output document
        PageList outPages = outDoc.getPages();
        outPages.add(contentsPage);
        for (Map.Entry entry : copiedPageLists)
        {
            outPages.addAll(entry.getValue());
        }

private static void AddPageNumber(Document outDoc, Page copiedPage, Font font, int pageNumber) throws PdfToolboxException, IOException
{
    // Create content generator
    try (ContentGenerator generator = new ContentGenerator(copiedPage.getContent(), false)) {
        // Create text object
        Text text = Text.create(outDoc);

        // Create a text generator with the given font, size and position
        try (TextGenerator textgenerator = new TextGenerator(text, font, 8, null)) {
            // Generate string to be stamped as page number
            String stampText = String.format("Page %d", pageNumber);

            // Calculate position for centering text at bottom of page
            Point position = new Point();
            position.x = (copiedPage.getSize().getWidth() / 2) - (textgenerator.getWidth(stampText) / 2);
            position.y = 10;

            // Position the text
            textgenerator.moveTo(position);
            // Add page number
            textgenerator.show(stampText);
        }

        // Paint the positioned text
        generator.paintText(text);
    }
}

private static Page CreateTableOfContents(Document outDoc, Set> copiedPageLists) throws IOException, PdfToolboxException
{
    // Create a new page with size equal to the first page copied
    Page page = Page.create(outDoc, copiedPageLists.iterator().next().getValue().get(0).getSize());

    // Create a font
    Font font = Font.createFromSystem(outDoc, "Arial", null, true);

    // Parameters for layout computation
    double border = 30;
    double textWidth = page.getSize().getWidth() - 2 * border;
    double chapterTitleSize = 24;
    double titleSize = 12;

    // The current text location
    Point location = new Point();
    location.x = border;
    location.y = page.getSize().getHeight() - border - chapterTitleSize;

    // The page number of the current item in the table of content
    int pageNumber = 2;

    // Creat a content generator for the table of contents page
    try (ContentGenerator contentGenerator = new ContentGenerator(page.getContent(), false)) {
        // Create a text object
        Text text = Text.create(outDoc);

        // Create a text generator to generate the table of contents. Initially, use the chapter title font size
        try (TextGenerator textGenerator = new TextGenerator(text, font, chapterTitleSize, location)) {
            // Show a chapter title
            textGenerator.showLine("Table of Contents");

            // Advance the vertical position
            location.y -= 1.7 * chapterTitleSize;

            // Select the font size for an entry in the table of contents
            textGenerator.setFontSize(titleSize);

            // Iterate over all copied page ranges
            for (Map.Entry entry : copiedPageLists)
            {
                // The title string for the current entry
                String title = entry.getKey();

                // The page number string of the target page for this entry
                String pageNumberString = String.format("%d", pageNumber);

                // The width of the page number string
                double pageNumberWidth = textGenerator.getWidth(pageNumberString);

                // Compute the number of filler dots to be displayed between the entry title and the page number
                int numberOfDots = (int)Math.floor((textWidth - textGenerator.getWidth(title) - pageNumberWidth) / textGenerator.getWidth("."));

                // Move to the current location and show the entry's title and the filler dots
                textGenerator.moveTo(location);
                String dots = new String();
                for (int i = 0; i < numberOfDots; i++)
                {
                    dots += '.';
                }
                textGenerator.show(title + dots);

                // Show the page number
                Point point = new Point();
                point.x = page.getSize().getWidth() - border - pageNumberWidth;
                point.y = location.y;
                textGenerator.moveTo(point);
                textGenerator.show(pageNumberString);

                // Compute the rectangle for the link
                Rectangle linkRectangle = new Rectangle();
                linkRectangle.setLeft(border);
                linkRectangle.setBottom(location.y + font.getDescent() * titleSize);
                linkRectangle.setRight(border + textWidth);
                linkRectangle.setTop(location.y + font.getAscent() * titleSize);

                // Create a destination to the first page of the current page range and create a link for this destination
                PageList pageList = entry.getValue();
                Page targetPage = pageList.get(0);
                LocationZoomDestination destination = LocationZoomDestination.create(outDoc, targetPage, (double) 0, targetPage.getSize().getHeight(), null);
                InternalLink link = InternalLink.create(outDoc, linkRectangle, destination);

                // Add the link to the table of contents page
                page.getLinks().add(link);

                // Advance the location for the next entry
                location.y -= 1.8 * titleSize;
                pageNumber += pageList.size();
            }
        }

        // Paint the generated text
        contentGenerator.paintText(text);
    }

    // Return the finished table-of-contents page
    return page;
}

// Create output document
using (Stream outStream = new FileStream(outPath, FileMode.Create, FileAccess.ReadWrite))
using (Document outDoc = Document.Create(outStream, null, null))
{
    // Define page copy options
    PageCopyOptions copyOptions = new PageCopyOptions();

    // Get output pages
    PageList outPages = outDoc.Pages;

    // Merge input documents 
    for (int i = 0; i < args.Length - 1; i++)
    {
        // Open input document
        using Stream inFs = new FileStream(inPath[i], FileMode.Open, FileAccess.Read);
        using Document inDoc = Document.Open(inFs, null);

        // Copy all pages and append to output document
        PageList copiedPages = PageList.Copy(outDoc, inDoc.Pages, copyOptions);
        outPages.AddRange(copiedPages);
    }
}

try (
    FileStream outStream = new FileStream(outPath, FileStream.Mode.READ_WRITE_NEW)) {
    try (// Create output document
        Document outDoc = Document.create(outStream, null, null)) {

        // Configure page copy options
        PageCopyOptions copyOptions = new PageCopyOptions();

        // Get output pages
        PageList outPages = outDoc.getPages();

        // Merge input document
        for (int i = 0; i < args.length - 1; i++) {
            try (// Open input document
                FileStream inStream = new FileStream(inPath[i], FileStream.Mode.READ_ONLY);
                Document inDoc = Document.open(inStream, null)) {

                // Copy all pages and append to output document
                PageList copiedPages = PageList.copy(outDoc, inDoc.getPages(), copyOptions);
                outPages.addAll(copiedPages);
            }
        }
    }
}

// Create output document
pOutStream = _tfopen(szOutPath, _T("wb+"));
GOTO_CLEANUP_IF_NULL(pOutStream, _T("Failed to open output file \"%s\".\n"), szOutPath);
PtxSysCreateFILEStreamDescriptor(&outDescriptor, pOutStream, 0);
pOutDoc = PtxPdf_Document_Create(&outDescriptor, NULL, NULL);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutDoc, _T("Output file \"%s\" cannot be created. %s (ErrorCode: 0x%08x).\n"), szOutPath, szErrorBuff, Ptx_GetLastError());

// Configure copy options
pCopyOptions = PtxPdf_PageCopyOptions_New();

// Get output page list
pOutPageList = PtxPdf_Document_GetPages(pOutDoc);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutPageList, _T("Failed to get pages of the output document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Merge input documents
for (int i = 1; i < argc - 1; i++)
{
    // Open input document
    pInStream = _tfopen(szInPath[i], _T("rb"));
    GOTO_CLEANUP_IF_NULL(pInStream, _T("Failed to open input file \"%s\".\n"), szInPath[i]);
    PtxSysCreateFILEStreamDescriptor(&descriptor, pInStream, 0);
    pInDoc = PtxPdf_Document_Open(&descriptor, _T(""));
    GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInDoc, _T("Input file \"%s\" cannot be opened. %s (ErrorCode: 0x%08x).\n"), szInPath[i], szErrorBuff, Ptx_GetLastError());

    // Configure copy options
    pCopyOptions = PtxPdf_PageCopyOptions_New();

    // Copy all pages
    pInPageList = PtxPdf_Document_GetPages(pInDoc);
    GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInPageList, _T("Failed to get pages of the input document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
    pCopiedPages = PtxPdf_PageList_Copy(pOutDoc, pInPageList, pCopyOptions);
    GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pCopiedPages, _T("Failed to copy pages. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

    // Append copied pages
    GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdf_PageList_AddRange(pOutPageList, pCopiedPages), _T("Failed to add page range. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

    Ptx_Release(pInPageList);
    pInPageList = NULL;
    GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdf_Document_Close(pInDoc), _T("Failed to close input document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
    pInDoc = NULL;
    fclose(pInStream);
    pInStream = NULL;
    Ptx_Release(pCopiedPages);
    pCopiedPages = NULL;
}

// Create output document
using (Stream outStream = new FileStream(outPath, FileMode.Create, FileAccess.ReadWrite))
using (Document outDoc = Document.Create(outStream, null, null))
{
    // Define page copy options, skip outline
    PageCopyOptions pageCopyOptions = new PageCopyOptions
    {
        CopyOutlineItems = false
    };

    // Define outline copy options
    OutlineCopyOptions outlineCopyOptions = new OutlineCopyOptions();

    // Get output pages
    PageList outPages = outDoc.Pages;

    // Merge input documents
    foreach (string inPath in inPaths)
    {
        // Open input document
        using Stream inFs = new FileStream(inPath, FileMode.Open, FileAccess.Read);
        using Document inDoc = Document.Open(inFs, null);

        // Copy all pages and append to output document
        PageList copiedPages = PageList.Copy(outDoc, inDoc.Pages, pageCopyOptions);
        outPages.AddRange(copiedPages);

        // Create outline item
        string title = inDoc.Metadata.Title ?? Path.GetFileName(inPath);
        Page firstCopiedPage = copiedPages[0];
        Destination destination = LocationZoomDestination.Create(outDoc, firstCopiedPage, 0, firstCopiedPage.Size.Height, null);
        OutlineItem outlineItem = OutlineItem.Create(outDoc, title, destination);
        outDoc.Outline.Add(outlineItem);

        // Add outline items from input document as children
        OutlineItemList children = outlineItem.Children;
        foreach (OutlineItem inputOutline in inDoc.Outline)
            children.Add(OutlineItem.Copy(outDoc, inputOutline, outlineCopyOptions));
    }
}

try (
    FileStream outStream = new FileStream(outPath, FileStream.Mode.READ_WRITE_NEW)) {
    try (// Create output document
        Document outDoc = Document.create(outStream, null, null)) {
        // Define page copy options, skip outline
        PageCopyOptions pageCopyOptions = new PageCopyOptions();
        pageCopyOptions.setCopyOutlineItems(false);

        // Define outline copy options
        OutlineCopyOptions outlineCopyOptions = new OutlineCopyOptions();

        // Get output pages
        PageList outPages = outDoc.getPages();

        // Merge input document
        for (String inPath : inPaths) {
            try (// Open input document
                FileStream inStream = new FileStream(inPath, FileStream.Mode.READ_ONLY);
                Document inDoc = Document.open(inStream, null)) {

                // Copy all pages and append to output document
                PageList copiedPages = PageList.copy(outDoc, inDoc.getPages(), pageCopyOptions);
                outPages.addAll(copiedPages);

                // Create outline item
                String title = inDoc.getMetadata().getTitle();
                if (title == null)
                    title = Paths.get(inPath).getFileName().toString();
                Page firstCopiedPage = copiedPages.get(0);
                Destination destination = LocationZoomDestination.create(outDoc, firstCopiedPage, 0.0,
                        firstCopiedPage.getSize().getHeight(), null);
                OutlineItem outlineItem = OutlineItem.create(outDoc, title, destination);
                outDoc.getOutline().add(outlineItem);

                // Add outline items from input document as children
                OutlineItemList children = outlineItem.getChildren();
                for (OutlineItem inputOutline : inDoc.getOutline())
                    children.add(OutlineItem.copy(outDoc, inputOutline, outlineCopyOptions));
            }
        }
    }
}

// Open input document
using (Stream inStream = new FileStream(inPath, FileMode.Open, FileAccess.Read))
using (Document inDoc = Document.Open(inStream, null))

// Create output document
using (Stream outStream = new FileStream(outPath, FileMode.Create, FileAccess.ReadWrite))
using (Document outDoc = Document.Create(outStream, inDoc.Conformance, null))
{
    // Copy document-wide data
    CopyDocumentData(inDoc, outDoc);

    // Create transparency and set blend mode
    Transparency transparency = new Transparency(colorAlpha)
    {
        BlendMode = BlendMode.Multiply
    };

    // Create colorspace
    ColorSpace colorSpace = ColorSpace.CreateProcessColorSpace(outDoc, colorType);

    // Create a transparent paint for the given color
    Paint paint = Paint.Create(outDoc, colorSpace, color, transparency);
    Fill fill = new Fill(paint);

    // Get output pages
    PageList outPages = outDoc.Pages;

    // Define page copy options
    PageCopyOptions copyOptions = new PageCopyOptions();

    // Loop through all pages
    foreach (Page inPage in inDoc.Pages)
    {
        // Create a new page
        Size size = inPage.Size;
        Page outPage = Page.Copy(outDoc, inPage, copyOptions);

        // Create a content generator
        using (ContentGenerator generator = new ContentGenerator(outPage.Content, false))
        {
            // Compute Rectangle
            Rectangle rect = new Rectangle
            {
                Left = 0,
                Bottom = 0,
                Right = size.Width,
                Top = size.Height
            };

            // Make a rectangular path the same size as the page
            PdfTools.FourHeights.PdfToolbox.Pdf.Content.Path path = new PdfTools.FourHeights.PdfToolbox.Pdf.Content.Path();
            using (PathGenerator pathGenerator = new PathGenerator(path))
            {
                Rectangle pathRect = new Rectangle
                {
                    Left = 0,
                    Bottom = 0,
                    Right = size.Width,
                    Top = size.Height
                };
                pathGenerator.AddRectangle(pathRect);
            }
            // Paint the path with the transparent paint
            generator.PaintPath(path, fill, null);
        }
        // Add pages to output document
        outPages.Add(outPage);
    }
}

private static void CopyDocumentData(Document inDoc, Document outDoc)
{
    // Copy document-wide data

    // Output intent
    if (inDoc.OutputIntent != null)
        outDoc.OutputIntent = IccBasedColorSpace.Copy(outDoc, inDoc.OutputIntent);

    // Metadata
    outDoc.Metadata = Metadata.Copy(outDoc, inDoc.Metadata);

    // Viewer settings
    outDoc.ViewerSettings = ViewerSettings.Copy(outDoc, inDoc.ViewerSettings);

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.AssociatedFiles;
    foreach (FileReference inFileRef in inDoc.AssociatedFiles)
        outAssociatedFiles.Add(FileReference.Copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.PlainEmbeddedFiles;
    foreach (FileReference inFileRef in inDoc.PlainEmbeddedFiles)
        outEmbeddedFiles.Add(FileReference.Copy(outDoc, inFileRef));
}

try (// Open input document
    FileStream inStream = new FileStream(inPath, FileStream.Mode.READ_ONLY);
    Document inDoc = Document.open(inStream, null);
    FileStream outStream = new FileStream(outPath, FileStream.Mode.READ_WRITE_NEW)) {
    try (// Create output document
        Document outDoc = Document.create(outStream, inDoc.getConformance(), null)) {

        // Copy document-wide data
        copyDocumentData(inDoc, outDoc);

        // Create transparency and set blend mode
        Transparency transparency = new Transparency(colorAlpha);
        transparency.setBlendMode(BlendMode.MULTIPLY);

        // Create colorspace
        ColorSpace colorSpace = ColorSpace.createProcessColorSpace(outDoc, colorType);

        // Create a transparent paint for the given color
        Paint paint = Paint.create(outDoc, colorSpace, color, transparency);
        Fill fill = new Fill(paint);

        // Set copy options
        PageCopyOptions copyOptions = new PageCopyOptions();

        // Loop through all pages
        for (Page inPage : inDoc.getPages()) {
            // Create a new page
            Size size = inPage.getSize();
            Page outPage = Page.copy(outDoc, inPage, copyOptions);

            try (// Create a content generator
                ContentGenerator generator = new ContentGenerator(outPage.getContent(), false)) {
                // Calculate rectangle
                Rectangle rect = new Rectangle(0, 0, size.width, size.height);

                // Make a rectangular path the same size as the page
                Path path = new Path();
                try (
                    PathGenerator pathGenerator = new PathGenerator(path)) {
                    pathGenerator.addRectangle(rect);
                }

                // Paint the path with the transparent paint
                generator.paintPath(path, fill, null);
            }

            // Add pages to output document
            outDoc.getPages().add(outPage);
        }
    }
}

private static void copyDocumentData(Document inDoc, Document outDoc) throws PdfToolboxException, IOException {
    // Copy document-wide data

    // Output intent
    if (inDoc.getOutputIntent() != null)
        outDoc.setOutputIntent(IccBasedColorSpace.copy(outDoc, inDoc.getOutputIntent()));

    // Metadata
    outDoc.setMetadata(Metadata.copy(outDoc, inDoc.getMetadata()));

    // Viewer settings
    outDoc.setViewerSettings(ViewerSettings.copy(outDoc, inDoc.getViewerSettings()));

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.getAssociatedFiles();
    for (FileReference inFileRef : inDoc.getAssociatedFiles())
        outAssociatedFiles.add(FileReference.copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.getPlainEmbeddedFiles();
    for (FileReference inFileRef : inDoc.getPlainEmbeddedFiles())
        outEmbeddedFiles.add(FileReference.copy(outDoc, inFileRef));
}

// Open input document 
using (Stream inStream = new FileStream(inPath, FileMode.Open, FileAccess.Read))
using (Document inDoc = Document.Open(inStream, null))

// Create output document
using (Stream outStream = new FileStream(outPath, FileMode.Create, FileAccess.ReadWrite))
using (Document outDoc = Document.Create(outStream, inDoc.Conformance, null))
{
    // Copy document-wide data
    CopyDocumentData(inDoc, outDoc);

    // Define page copy options
    PageCopyOptions copyOptions = new PageCopyOptions();

    // Copy all pages and append to output document
    PageList copiedPages = PageList.Copy(outDoc, inDoc.Pages, copyOptions);
    outDoc.Pages.AddRange(copiedPages);

    // Set info entry
    Metadata metadata = Metadata.Copy(outDoc, inDoc.Metadata);
    if (key == "Title")
        metadata.Title = value;
    else if (key == "Author")
        metadata.Author = value;
    else if (key == "Subject")
        metadata.Subject = value;
    else if (key == "Keywords")
        metadata.Keywords = value;
    else if (key == "CreationDate")
        metadata.CreationDate = DateTimeOffset.Parse(value);
    else if (key == "ModDate")
        throw new Exception("ModDate cannot be set.");
    else if (key == "Creator")
        metadata.Creator = value;
    else if (key == "Producer")
        throw new Exception("Producer is set by means of the license key.");
    else
        metadata.CustomEntries[key] = value;
    outDoc.Metadata = metadata;
}

private static void CopyDocumentData(Document inDoc, Document outDoc)
{
    // Copy document-wide data (except metadata)

    // Output intent
    if (inDoc.OutputIntent != null)
        outDoc.OutputIntent = IccBasedColorSpace.Copy(outDoc, inDoc.OutputIntent);

    // Viewer settings
    outDoc.ViewerSettings = ViewerSettings.Copy(outDoc, inDoc.ViewerSettings);

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.AssociatedFiles;
    foreach (FileReference inFileRef in inDoc.AssociatedFiles)
        outAssociatedFiles.Add(FileReference.Copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.PlainEmbeddedFiles;
    foreach (FileReference inFileRef in inDoc.PlainEmbeddedFiles)
        outEmbeddedFiles.Add(FileReference.Copy(outDoc, inFileRef));
}

try (// Open input document
    FileStream inStream = new FileStream(inPath, FileStream.Mode.READ_ONLY);
    Document inDoc = Document.open(inStream, null);
    FileStream outStream = new FileStream(outPath, FileStream.Mode.READ_WRITE_NEW)) {
    try (// Create output document
        Document outDoc = Document.create(outStream, inDoc.getConformance(), null)) {

        // Copy document-wide data
        copyDocumentData(inDoc, outDoc);

        // Define page copy options
        PageCopyOptions copyOptions = new PageCopyOptions();

        // Copy all pages and append to output document
        PageList copiedPages = PageList.copy(outDoc, inDoc.getPages(), copyOptions);
        outDoc.getPages().addAll(copiedPages);

        // Set info entry
        Metadata metadata = Metadata.copy(outDoc, inDoc.getMetadata());
        if (key.equals("Title"))
            metadata.setTitle(value);
        else if (key.equals("Author"))
            metadata.setAuthor(value);
        else if (key.equals("Subject"))
            metadata.setSubject(value);
        else if (key.equals("Keywords"))
            metadata.setKeywords(value);
        else if (key.equals("CreationDate")) {
            DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd' 'HH:mm:ssZ");
            OffsetDateTime creationDate = OffsetDateTime.parse(value, formatter);
            metadata.setCreationDate(creationDate);
        } else if (key.equals("ModDate"))
            throw new Exception("ModDate cannot be set.");
        else if (key.equals("Creator"))
            metadata.setCreator(value);
        else if (key.equals("Producer"))
            throw new Exception("Producer is set by means of the license key.");
        else
            metadata.getCustomEntries().put(key, value);
        outDoc.setMetadata(metadata);
    }
}

private static void copyDocumentData(Document inDoc, Document outDoc) throws PdfToolboxException, IOException {
    // Copy document-wide data (excluding metadata)

    // Output intent
    if (inDoc.getOutputIntent() != null)
        outDoc.setOutputIntent(IccBasedColorSpace.copy(outDoc, inDoc.getOutputIntent()));

    // Viewer settings
    outDoc.setViewerSettings(ViewerSettings.copy(outDoc, inDoc.getViewerSettings()));

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.getAssociatedFiles();
    for (FileReference inFileRef : inDoc.getAssociatedFiles())
        outAssociatedFiles.add(FileReference.copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.getPlainEmbeddedFiles();
    for (FileReference inFileRef : inDoc.getPlainEmbeddedFiles())
        outEmbeddedFiles.add(FileReference.copy(outDoc, inFileRef));
}

// Open input document
using (Stream inStream = new FileStream(inPath, FileMode.Open, FileAccess.Read))
using (Document inDoc = Document.Open(inStream, null))
{
    if (destinationPageNumber < 1 || destinationPageNumber > inDoc.Pages.Count)
        throw new ArgumentOutOfRangeException("Given page number is invalid");

    // Create output document
    using Stream outStream = new FileStream(outPath, FileMode.Create, FileAccess.ReadWrite);
    using Document outDoc = Document.Create(outStream, inDoc.Conformance, null);

    // Copy document-wide data
    CopyDocumentData(inDoc, outDoc);

    // Define page copy options
    PageCopyOptions copyOptions = new PageCopyOptions();

    // Copy all pages and append to output document
    PageList copiedPages = PageList.Copy(outDoc, inDoc.Pages, copyOptions);
    outDoc.Pages.AddRange(copiedPages);

    // Add open destination
    Page outPage = copiedPages[destinationPageNumber - 1];
    outDoc.OpenDestination = LocationZoomDestination.Create(outDoc, outPage, 0, outPage.Size.Height, null);
}

private static void CopyDocumentData(Document inDoc, Document outDoc)
{
    // Copy document-wide data

    // Output intent
    if (inDoc.OutputIntent != null)
        outDoc.OutputIntent = IccBasedColorSpace.Copy(outDoc, inDoc.OutputIntent);

    // Metadata
    outDoc.Metadata = Metadata.Copy(outDoc, inDoc.Metadata);

    // Viewer settings
    outDoc.ViewerSettings = ViewerSettings.Copy(outDoc, inDoc.ViewerSettings);

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.AssociatedFiles;
    foreach (FileReference inFileRef in inDoc.AssociatedFiles)
        outAssociatedFiles.Add(FileReference.Copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.PlainEmbeddedFiles;
    foreach (FileReference inFileRef in inDoc.PlainEmbeddedFiles)
        outEmbeddedFiles.Add(FileReference.Copy(outDoc, inFileRef));
}

try (// Open input document
    FileStream inStream = new FileStream(inPath, FileStream.Mode.READ_ONLY);
    Document inDoc = Document.open(inStream, null);
    FileStream outStream = new FileStream(outPath, FileStream.Mode.READ_WRITE_NEW)) {
    try (// Create output document
        Document outDoc = Document.create(outStream, inDoc.getConformance(), null)) {

        // Check given page number
        if (destinationPageNumber < 1 || destinationPageNumber > inDoc.getPages().size()) {
            System.out.println("Given pageNumber is invalid.");
            return;
        }

        // Copy document-wide data
        copyDocumentData(inDoc, outDoc);

        // Define page copy options
        PageCopyOptions copyOptions = new PageCopyOptions();

        // Copy all pages and append to output document
        PageList copiedPages = PageList.copy(outDoc, inDoc.getPages(), copyOptions);
        outDoc.getPages().addAll(copiedPages);

        // Add open destination
        Page outPage = outDoc.getPages().get(destinationPageNumber - 1);
        LocationZoomDestination destination = LocationZoomDestination.create(outDoc, outPage, 0.0, outPage.getSize().getHeight(), null); 
        outDoc.setOpenDestination(destination);
    }
}

private static void copyDocumentData(Document inDoc, Document outDoc) throws PdfToolboxException, IOException {
    // Copy document-wide data

    // Output intent
    if (inDoc.getOutputIntent() != null)
        outDoc.setOutputIntent(IccBasedColorSpace.copy(outDoc, inDoc.getOutputIntent()));

    // Metadata
    outDoc.setMetadata(Metadata.copy(outDoc, inDoc.getMetadata()));

    // Viewer settings
    outDoc.setViewerSettings(ViewerSettings.copy(outDoc, inDoc.getViewerSettings()));

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.getAssociatedFiles();
    for (FileReference inFileRef : inDoc.getAssociatedFiles())
        outAssociatedFiles.add(FileReference.copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.getPlainEmbeddedFiles();
    for (FileReference inFileRef : inDoc.getPlainEmbeddedFiles())
        outEmbeddedFiles.add(FileReference.copy(outDoc, inFileRef));
}

// Open input document
using (Stream inStream = new FileStream(inPath, FileMode.Open, FileAccess.Read))
using (Document inDoc = Document.Open(inStream, null))
{
    startIndex = Math.Max(Math.Min(inDoc.Pages.Count - 1, startIndex), 0);
    count = Math.Min(inDoc.Pages.Count - startIndex, count);
    if (count <= 0)
    {
        Console.WriteLine("lastPage must be greater or equal to firstPage");
        return;
    }

    // Create output document
    using Stream outStream = new FileStream(outPath, FileMode.Create, FileAccess.ReadWrite);
    using Document outDoc = Document.Create(outStream, inDoc.Conformance, null);

    // Copy document-wide data
    CopyDocumentData(inDoc, outDoc);

    // Define page copy options
    PageCopyOptions copyOptions = new PageCopyOptions();

    // Get page range from input pages
    PageList inPageRange = inDoc.Pages.GetRange(startIndex, count);

    // Copy page range and append to output document
    PageList outPageRange = PageList.Copy(outDoc, inPageRange, copyOptions);
    outDoc.Pages.AddRange(outPageRange);
}

private static void CopyDocumentData(Document inDoc, Document outDoc)
{
    // Copy document-wide data

    // Output intent
    if (inDoc.OutputIntent != null)
        outDoc.OutputIntent = IccBasedColorSpace.Copy(outDoc, inDoc.OutputIntent);

    // Metadata
    outDoc.Metadata = Metadata.Copy(outDoc, inDoc.Metadata);

    // Viewer settings
    outDoc.ViewerSettings = ViewerSettings.Copy(outDoc, inDoc.ViewerSettings);

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.AssociatedFiles;
    foreach (FileReference inFileRef in inDoc.AssociatedFiles)
        outAssociatedFiles.Add(FileReference.Copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.PlainEmbeddedFiles;
    foreach (FileReference inFileRef in inDoc.PlainEmbeddedFiles)
        outEmbeddedFiles.Add(FileReference.Copy(outDoc, inFileRef));
}

try (// Open input document
    FileStream inStream = new FileStream(inPath, FileStream.Mode.READ_ONLY);
    Document inDoc = Document.open(inStream, null)) {
    // Get pages from input document
    PageList inPages = inDoc.getPages();

    // Correct and check page indices
    startIndex = Math.max(Math.min(inPages.size() - 1, startIndex), 0);
    endIndex = Math.max(Math.min(inPages.size(), endIndex), 0);
    if (startIndex >= endIndex) {
        System.out.println("lastPage must be greater or equal to firstPage");
        return;
    }
    try (
        FileStream outStream = new FileStream(outPath, FileStream.Mode.READ_WRITE_NEW)) {
        try (// Create output document
            Document outDoc = Document.create(outStream, inDoc.getConformance(), null)) {

            // Copy document-wide data
            copyDocumentData(inDoc, outDoc);

            // Define page copy options
            PageCopyOptions copyOptions = new PageCopyOptions();

            // Get page range from input pages
            PageList inPageRange = inPages.subList(startIndex, endIndex);

            // Copy page range and append to output document
            PageList outPageRange = PageList.copy(outDoc, inPageRange, copyOptions);
            outDoc.getPages().addAll(outPageRange);
        }
    }
}

private static void copyDocumentData(Document inDoc, Document outDoc) throws PdfToolboxException, IOException {
    // Copy document-wide data

    // Output intent
    if (inDoc.getOutputIntent() != null)
        outDoc.setOutputIntent(IccBasedColorSpace.copy(outDoc, inDoc.getOutputIntent()));

    // Metadata
    outDoc.setMetadata(Metadata.copy(outDoc, inDoc.getMetadata()));

    // Viewer settings
    outDoc.setViewerSettings(ViewerSettings.copy(outDoc, inDoc.getViewerSettings()));

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.getAssociatedFiles();
    for (FileReference inFileRef : inDoc.getAssociatedFiles())
        outAssociatedFiles.add(FileReference.copy(outDoc, inFileRef));

    // Plain mbedded files
    FileReferenceList outEmbeddedFiles = outDoc.getPlainEmbeddedFiles();
    for (FileReference inFileRef : inDoc.getPlainEmbeddedFiles())
        outEmbeddedFiles.add(FileReference.copy(outDoc, inFileRef));
}

// Open input document
pInStream = _tfopen(szInPath, _T("rb"));
GOTO_CLEANUP_IF_NULL(pInStream, _T("Failed to open input file \"%s\".\n"), szInPath);
PtxSysCreateFILEStreamDescriptor(&descriptor, pInStream, 0);
pInDoc = PtxPdf_Document_Open(&descriptor, _T(""));
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInDoc, _T("Input file \"%s\" cannot be opened. %s (ErrorCode: 0x%08x).\n"), szInPath, szErrorBuff, Ptx_GetLastError());

pInPageList = PtxPdf_Document_GetPages(pInDoc);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInPageList, _T("Failed to get the pages of the input document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
int nInPages = PtxPdf_PageList_GetCount(pInPageList);
iStartIndex = MAX(MIN(nInPages - 1, iStartIndex), 0);
nCount = MIN(nInPages - iStartIndex, nCount);
GOTO_CLEANUP_IF_FALSE(nCount > 0, _T("lastPage must be greater or equal to firstPage.\n"));

// Create output document
pOutStream = _tfopen(szOutPath, _T("wb+"));
GOTO_CLEANUP_IF_NULL(pOutStream, _T("Failed to open output file \"%s\".\n"), szOutPath);
PtxSysCreateFILEStreamDescriptor(&outDescriptor, pOutStream, 0);
iConformance = PtxPdf_Document_GetConformance(pInDoc);
pOutDoc = PtxPdf_Document_Create(&outDescriptor, &iConformance, NULL);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutDoc, _T("Output file \"%s\" cannot be created. %s (ErrorCode: 0x%08x).\n"), szOutPath, szErrorBuff, Ptx_GetLastError());

// Copy document-wide data
GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(copyDocumentData(pInDoc, pOutDoc), _T("Failed to copy document-wide data. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Configure copy options
pCopyOptions = PtxPdf_PageCopyOptions_New();

// Get page range from input pages
pInPageRange = PtxPdf_PageList_GetRange(pInPageList, iStartIndex, nCount);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInPageRange, _T("Failed to get page range from input document. %s (ErrorCode: 0x%08x)\n"), szErrorBuff, Ptx_GetLastError());

// Copy page range to toutput document
pOutPageRange = PtxPdf_PageList_Copy(pOutDoc, pInPageRange, pCopyOptions);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInPageRange, _T("Failed to copy page range. %s (ErrorCode: 0x%08x)\n"), szErrorBuff, Ptx_GetLastError());

// Get output pages
pOutPageList = PtxPdf_Document_GetPages(pOutDoc);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutPageList, _T("Failed to get the pages of the output document. %s (ErrorCode: 0x%08x)\n"), szErrorBuff, Ptx_GetLastError());

// Appende page range to output pages
GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdf_PageList_AddRange(pOutPageList, pOutPageRange), _T("Failed to append page range. %s (ErrorCode: 0x%08x)\n"), szErrorBuff, Ptx_GetLastError());

int copyDocumentData(TPtxPdf_Document * pInDoc, TPtxPdf_Document * pOutDoc)
{
    TPtxPdf_FileReferenceList* pInFileRefList;
    TPtxPdf_FileReferenceList* pOutFileRefList;

    // Output intent
    if (PtxPdf_Document_GetOutputIntent(pInDoc) != NULL)
        if (PtxPdf_Document_SetOutputIntent(pOutDoc, PtxPdfContent_IccBasedColorSpace_Copy(pOutDoc, PtxPdf_Document_GetOutputIntent(pInDoc))) == FALSE)
            return FALSE;

    // Metadata
    if (PtxPdf_Document_SetMetadata(pOutDoc, PtxPdf_Metadata_Copy(pOutDoc, PtxPdf_Document_GetMetadata(pInDoc))) == FALSE)
        return FALSE;

    // Viewer settings
    if (PtxPdf_Document_SetViewerSettings(pOutDoc, PtxPdfNav_ViewerSettings_Copy(pOutDoc, PtxPdf_Document_GetViewerSettings(pInDoc))) == FALSE)
        return FALSE;

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    pInFileRefList = PtxPdf_Document_GetAssociatedFiles(pInDoc);
    pOutFileRefList = PtxPdf_Document_GetAssociatedFiles(pOutDoc);
    if (pInFileRefList == NULL || pOutFileRefList == NULL)
        return FALSE;
    for (int iFileRef = 0; iFileRef < PtxPdf_FileReferenceList_GetCount(pInFileRefList); iFileRef++)
        if (PtxPdf_FileReferenceList_Add(pOutFileRefList, PtxPdf_FileReference_Copy(pOutDoc, PtxPdf_FileReferenceList_Get(pInFileRefList, iFileRef))) == FALSE)
            return FALSE;

    // Plain embedded files
    pInFileRefList = PtxPdf_Document_GetPlainEmbeddedFiles(pInDoc);
    pOutFileRefList = PtxPdf_Document_GetPlainEmbeddedFiles(pOutDoc);
    if (pInFileRefList == NULL || pOutFileRefList == NULL)
        return FALSE;
    for (int iFileRef = 0; iFileRef < PtxPdf_FileReferenceList_GetCount(pInFileRefList); iFileRef++)
        if (PtxPdf_FileReferenceList_Add(pOutFileRefList, PtxPdf_FileReference_Copy(pOutDoc, PtxPdf_FileReferenceList_Get(pInFileRefList, iFileRef))) == FALSE)
            return FALSE;

    return TRUE;
}

// Open input document
using (Stream inStream = new FileStream(inPath, FileMode.Open, FileAccess.Read))
using (Document inDoc = Document.Open(inStream, null))
{
    // Collect all outline items at the given level
    List outlines = GetOutlines(inDoc.Outline, level);

    // Collect all page ranges corresponding to the given outline items
    List> parts = GetParts(inDoc.Pages, outlines);

    // Iterate over all collected parts
    foreach (var part in parts)
    {
        // Turn the outline item's title into a valid file name
        string fileName = part.Item2.Title;
        foreach (char c in System.IO.Path.GetInvalidFileNameChars())
        {
            fileName = fileName.Replace(c, '_');
        }
        fileName += ".pdf";
        fileName = System.IO.Path.Combine(outDir, fileName);

        // Create output document
        using Stream outStream = new FileStream(fileName, FileMode.Create, FileAccess.ReadWrite);
        using Document outDoc = Document.Create(outStream, inDoc.Conformance, null);

        // Copy document-wide data
        CopyDocumentData(inDoc, outDoc);

        // Define page copy options
        PageCopyOptions pageCopyOptions = new PageCopyOptions();
        pageCopyOptions.CopyOutlineItems = false;

        // Copy the pages and add to the output document's page list
        PageList outPages = PageList.Copy(outDoc, part.Item1, pageCopyOptions);
        outDoc.Pages.AddRange(outPages);

        // Copy child outline items
        OutlineCopyOptions outlineCopyOptions = new OutlineCopyOptions();
        foreach (var child in part.Item2.Children)
        {
            outDoc.Outline.Add(OutlineItem.Copy(outDoc, child, outlineCopyOptions));
        }
    }
}

private static List GetOutlines(OutlineItemList currentOutlines, int level, int currentLevel = 1)
{
    List matchingOutlines = new List();
    // If the current level matches the specified level add the given outline items
    if (level == currentLevel)
    {
        matchingOutlines.AddRange(currentOutlines);
    }
    else
    {
        // Otherwise recurse to next level
        foreach (var outline in currentOutlines)
        {
            matchingOutlines.AddRange(GetOutlines(outline.Children, level, currentLevel + 1));
        }
    }
    return matchingOutlines;
}

private static List> GetParts(PageList inPages, List outlines)
{
    // Construct parts according to the given outlines
    List> parts = new List>();

    // No parts to be constructed if no outlines are found
    if (outlines.Count == 0)
        return parts;

    // Keep both the last and the next outline items while iterating
    OutlineItem lastOutline = null;
    var outlineEnumerator = outlines.GetEnumerator();
    outlineEnumerator.MoveNext();
    OutlineItem nextOutline = outlineEnumerator.Current;

    // Keep both, the last and the current page index while iterating
    int lastPageIndex = 0;
    for (int pageIndex = 0; pageIndex < inPages.Count; pageIndex++)
    {
        // Check if this page is the destination's page of the next outline
        if (inPages[pageIndex].Equals(nextOutline.Destination.Target.Page))
        {
            // Create a new part if the last outline item is defined and if the page index has increased at least by 1
            if (lastOutline != null && pageIndex - lastPageIndex > 0)
                parts.Add(new Tuple(inPages.GetRange(lastPageIndex, pageIndex - lastPageIndex), lastOutline));

            // Keep the current page index as the last page index used
            lastPageIndex = pageIndex;

            // Keep the current outline as the last outline used
            lastOutline = nextOutline;

            // Iterate to the next outline item and stop if none left
            if (outlineEnumerator.MoveNext())
                nextOutline = outlineEnumerator.Current;
            else
                break;
        }
    }
    // Add the last part which is assumed to contain all the pages until the end of the document
    parts.Add(new Tuple(inPages.GetRange(lastPageIndex, inPages.Count - lastPageIndex), lastOutline));
    return parts;
}

private static void CopyDocumentData(Document inDoc, Document outDoc)
{
    // Copy document-wide data

    // Output intent
    if (inDoc.OutputIntent != null)
        outDoc.OutputIntent = IccBasedColorSpace.Copy(outDoc, inDoc.OutputIntent);

    // Metadata
    outDoc.Metadata = Metadata.Copy(outDoc, inDoc.Metadata);

    // Viewer settings
    outDoc.ViewerSettings = ViewerSettings.Copy(outDoc, inDoc.ViewerSettings);

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.AssociatedFiles;
    foreach (FileReference inFileRef in inDoc.AssociatedFiles)
        outAssociatedFiles.Add(FileReference.Copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.PlainEmbeddedFiles;
    foreach (FileReference inFileRef in inDoc.PlainEmbeddedFiles)
        outEmbeddedFiles.Add(FileReference.Copy(outDoc, inFileRef));
}

// Open input document
using (Stream inStream = new FileStream(inPath, FileMode.Open, FileAccess.Read))
using (Document inDoc = Document.Open(inStream, null))

// Create output document 
using (Stream outStream = new FileStream(outPath, FileMode.Create, FileAccess.ReadWrite))
using (Document outDoc = Document.Create(outStream, inDoc.Conformance, null))
{
    // Copy document-wide data
    CopyDocumentData(inDoc, outDoc);

    // Create a font
    Font font = Font.CreateFromSystem(outDoc, "Arial", "Italic", true);

    // Copy pages
    PageList inPages = inDoc.Pages;
    PageList outPages = outDoc.Pages;
    int numberOfSheets = (inPages.Count + 3) / 4;

    for (int sheetNumber = 0; sheetNumber < numberOfSheets; ++sheetNumber)
    {

        // Add on front side
        CreateBooklet(inPages, outDoc, outPages, 4 * numberOfSheets - 2 * sheetNumber - 1,
            2 * sheetNumber, font);

        // Add on back side
        CreateBooklet(inPages, outDoc, outPages, 2 * sheetNumber + 1,
            4 * numberOfSheets - 2 * sheetNumber - 2, font);
    }
}

private static void CopyDocumentData(Document inDoc, Document outDoc)
{
    // Copy document-wide data

    // Output intent
    if (inDoc.OutputIntent != null)
        outDoc.OutputIntent = IccBasedColorSpace.Copy(outDoc, inDoc.OutputIntent);

    // Metadata
    outDoc.Metadata = Metadata.Copy(outDoc, inDoc.Metadata);

    // Viewer settings
    outDoc.ViewerSettings = ViewerSettings.Copy(outDoc, inDoc.ViewerSettings);

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.AssociatedFiles;
    foreach (FileReference inFileRef in inDoc.AssociatedFiles)
        outAssociatedFiles.Add(FileReference.Copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.PlainEmbeddedFiles;
    foreach (FileReference inFileRef in inDoc.PlainEmbeddedFiles)
        outEmbeddedFiles.Add(FileReference.Copy(outDoc, inFileRef));
}

private static void CreateBooklet(PageList inPages, Document outDoc, PageList outPages, int leftPageIndex,
    int rightPageIndex, Font font)
{
    // Define page copy options
    PageCopyOptions copyOptions = new PageCopyOptions();

    // Create page object
    Page outpage = Page.Create(outDoc, PageSize);

    // Create content generator
    using (ContentGenerator generator = new ContentGenerator(outpage.Content, false))
    {
        // Left page 
        if (leftPageIndex < inPages.Count)
        {
            // Copy page from input to output
            Page leftPage = inPages[leftPageIndex];
            Group leftGroup = Group.CopyFromPage(outDoc, leftPage, copyOptions);

            // Paint group on the calculated rectangle
            generator.PaintGroup(leftGroup, ComputTargetRect(leftGroup.Size, true), null);

            // Add page number to page
            StampPageNumber(outDoc, font, generator, leftPageIndex + 1, true);
        }

        // Right page
        if (rightPageIndex < inPages.Count)
        {
            // Copy page from input to output
            Page rigthPage = inPages[rightPageIndex];
            Group rightGroup = Group.CopyFromPage(outDoc, rigthPage, copyOptions);

            // Paint group on the calculated rectangle
            generator.PaintGroup(rightGroup, ComputTargetRect(rightGroup.Size, false), null);

            // Add page number to page
            StampPageNumber(outDoc, font, generator, rightPageIndex + 1, false);
        }
    }
    // Add page to output document
    outPages.Add(outpage);
}

private static Rectangle ComputTargetRect(Size bbox, bool isLeftPage)
{
    // Calculate factor for fitting page into rectangle
    double scale = Math.Min(CellWidth / bbox.Width, CellHeight / bbox.Height);
    double groupWidth = bbox.Width * scale;
    double groupHeight = bbox.Height * scale;

    // Calculate x-value
    double groupXPos = isLeftPage ? CellLeft + (CellWidth - groupWidth) / 2 :
                                    CellRight + (CellWidth - groupWidth) / 2;

    // Calculate y-value
    double groupYPos = CellYPos + (CellHeight - groupHeight) / 2;

    // Calculate rectangle
    return new Rectangle
    {
        Left = groupXPos,
        Bottom = groupYPos,
        Right = groupXPos + groupWidth,
        Top = groupYPos + groupHeight
    };
}

private static void StampPageNumber(Document document, Font font, ContentGenerator generator,
    int PageNo, bool isLeftPage)
{
    // Create text object
    Text text = Text.Create(document);

    // Create text generator
    using (TextGenerator textgenerator = new TextGenerator(text, font, 8, null))
    {
        string stampText = string.Format("Page {0}", PageNo);

        // Get width of stamp text
        double width = textgenerator.GetWidth(stampText);

        // Calculate position
        double x = isLeftPage ? Border + 0.5 * CellWidth - width / 2 :
                                2 * Border + 1.5 * CellWidth - width / 2;
        double y = Border;

        // Move to position
        textgenerator.MoveTo(new Point { X = x, Y = y});

        // Add page number
        textgenerator.Show(stampText);
    }
    // Paint the positioned text
    generator.PaintText(text);
}

try (// Open input document
    FileStream inStream = new FileStream(inPath, FileStream.Mode.READ_ONLY);
    Document inDoc = Document.open(inStream, null);
    FileStream outStream = new FileStream(outPath, FileStream.Mode.READ_WRITE_NEW)) {
    try (// Create output document
        Document outDoc = Document.create(outStream, inDoc.getConformance(), null)) {
        Font font = Font.createFromSystem(outDoc, "Arial", "Italic", true);

        // Copy document-wide data
        copyDocumentData(inDoc, outDoc);

        // Copy pages
        PageList inPages = inDoc.getPages();
        PageList outPages = outDoc.getPages();
        int numberOfSheets = (inPages.size() + 3) / 4;

        for (int sheetNumber = 0; sheetNumber < numberOfSheets; ++sheetNumber) {
            // Add on front side
            createBooklet(inPages, outDoc, outPages, 4 * numberOfSheets - 2 * sheetNumber - 1,
                    2 * sheetNumber, font);

            // Add on back side
            createBooklet(inPages, outDoc, outPages, 2 * sheetNumber + 1,
                    4 * numberOfSheets - 2 * sheetNumber - 2, font);
        }
    }
}

private static void copyDocumentData(Document inDoc, Document outDoc) throws PdfToolboxException, IOException {
    // Copy document-wide data

    // Output intent
    if (inDoc.getOutputIntent() != null)
        outDoc.setOutputIntent(IccBasedColorSpace.copy(outDoc, inDoc.getOutputIntent()));

    // Metadata
    outDoc.setMetadata(Metadata.copy(outDoc, inDoc.getMetadata()));

    // Viewer settings
    outDoc.setViewerSettings(ViewerSettings.copy(outDoc, inDoc.getViewerSettings()));

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.getAssociatedFiles();
    for (FileReference inFileRef : inDoc.getAssociatedFiles())
        outAssociatedFiles.add(FileReference.copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.getPlainEmbeddedFiles();
    for (FileReference inFileRef : inDoc.getPlainEmbeddedFiles())
        outEmbeddedFiles.add(FileReference.copy(outDoc, inFileRef));
}

private static void createBooklet(PageList inPages, Document outDoc, PageList outPages, int leftPageIndex,
        int rightPageIndex, Font font) throws PdfToolboxException, IOException {
    // Define page copy options
    PageCopyOptions copyOptions = new PageCopyOptions();

    // Create page object
    Page outPage = Page.create(outDoc,  new Size(PageWidth, PageHeight));

    try (// Create content generator
        ContentGenerator generator = new ContentGenerator(outPage.getContent(), false)) {

        // Left page
        if (leftPageIndex < inPages.size()) {
            Page leftPage = inPages.get(leftPageIndex);

            // Copy page from input to output
            Group leftGroup = Group.copyFromPage(outDoc, leftPage, copyOptions);

            // Paint group on the calculated rectangle
            generator.paintGroup(leftGroup, computeTargetRect(leftGroup.getSize(), true), null);

            // Add page number to page
            StampPageNumber(outDoc, font, generator, leftPageIndex + 1, true);
        }

        // Right page
        if (rightPageIndex < inPages.size()) {
            Page rightPage = inPages.get(rightPageIndex);

            // Copy page from input to output
            Group rightGroup = Group.copyFromPage(outDoc, rightPage, copyOptions);

            // Paint group on the calculated rectangle
            generator.paintGroup(rightGroup, computeTargetRect(rightGroup.getSize(), false), null);

            // Add page number to page
            StampPageNumber(outDoc, font, generator, rightPageIndex + 1, false);
        }
    }
    // Add page to output document
    outPages.add(outPage);
}

private static Rectangle computeTargetRect(Size bbox, Boolean isLeftPage) {
    // Calculate factor for fitting page into rectangle
    double scale = Math.min(CellWidth / bbox.width, CellHeight / bbox.height);
    double groupWidth = bbox.width * scale;
    double groupHeight = bbox.height * scale;

    // Calculate x-value
    double groupXPos = isLeftPage ? CellLeft + (CellWidth - groupWidth) / 2 :
                                    CellRight + (CellWidth - groupWidth) / 2;

    // Calculate y-value
    double groupYPos = CellYPos + (CellHeight - groupHeight) / 2;

    // Calculate rectangle
    return new Rectangle(groupXPos, groupYPos, groupXPos + groupWidth, groupYPos + groupHeight);
}

private static void StampPageNumber(Document document, Font font, ContentGenerator generator, int pageNo,
        boolean isLeftPage) throws PdfToolboxException, IOException {
    // Create text object
    Text text = Text.create(document);

    try (// Create text generator
        TextGenerator textgenerator = new TextGenerator(text, font, 8, null)) {
        String stampText = String.format("Page %d", pageNo);

        // Get width of stamp text
        double width = textgenerator.getWidth(stampText);

        // Calculate position
        double x = isLeftPage ? Border + 0.5 * CellWidth - width / 2 :
                                2 * Border + 1.5 * CellWidth - width / 2;
        double y = Border;

        // Move to position
        textgenerator.moveTo(new Point(x, y));

        // Add page number
        textgenerator.show(stampText);
    }

    // Paint the positioned text
    generator.paintText(text);
}

int copyDocumentData(TPtxPdf_Document * pInDoc, TPtxPdf_Document * pOutDoc)
{
    // Objects that need releasing or closing
    TPtxPdfContent_IccBasedColorSpace* pInOutputIntent = NULL;
    TPtxPdfContent_IccBasedColorSpace* pOutOutputIntent = NULL;
    TPtxPdf_Metadata* pInMetadata = NULL;
    TPtxPdf_Metadata* pOutMetadata = NULL;
    TPtxPdfNav_ViewerSettings* pInViewerSettings = NULL;
    TPtxPdfNav_ViewerSettings* pOutViewerSettings = NULL;
    TPtxPdf_FileReferenceList* pInFileRefList = NULL;
    TPtxPdf_FileReferenceList* pOutFileRefList = NULL;
    TPtxPdf_FileReference* pInFileRef = NULL;
    TPtxPdf_FileReference* pOutFileRef = NULL;

    iReturnValue = 0;

    // Output intent
    pInOutputIntent = PtxPdf_Document_GetOutputIntent(pInDoc);
    if (pInOutputIntent != NULL)
    {
        pOutOutputIntent = PtxPdfContent_IccBasedColorSpace_Copy(pOutDoc, pInOutputIntent);
        GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutOutputIntent, _T("Failed to copy ICC-based color space. %s (ErrorCode: 0x%08x)\n"), szErrorBuff, Ptx_GetLastError());
        GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdf_Document_SetOutputIntent(pOutDoc, pOutOutputIntent), _T("Failed to set output intent. %s (ErrorCode: 0x%08x)\n"), szErrorBuff, Ptx_GetLastError());
    }
    else
        GOTO_CLEANUP_IF_ERROR_PRINT_ERROR(_T("Failed to get output intent. %s (ErrorCode: 0x%08x)\n"), szErrorBuff, Ptx_GetLastError());

    // Metadata
    pInMetadata = PtxPdf_Document_GetMetadata(pInDoc);
    if (pInMetadata != NULL)
    {
        pOutMetadata = PtxPdf_Metadata_Copy(pOutDoc, pInMetadata);
        GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutMetadata, _T("Failed to copy metadata. %s (ErrorCode: 0x%08x)\n"), szErrorBuff, Ptx_GetLastError());
        GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdf_Document_SetMetadata(pOutDoc, pOutMetadata), _T("Failed to set metadata. %s (ErrorCode: 0x%08x)\n"), szErrorBuff, Ptx_GetLastError());
    }
    else
        GOTO_CLEANUP_IF_ERROR_PRINT_ERROR(_T("Failed to get metadata. %s (ErrorCode: 0x%08x)\n"), szErrorBuff, Ptx_GetLastError());

    // Viewer settings
    pInViewerSettings = PtxPdf_Document_GetViewerSettings(pInDoc);
    if (pInViewerSettings != NULL)
    {
        pOutViewerSettings = PtxPdfNav_ViewerSettings_Copy(pOutDoc, pInViewerSettings);
        GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutViewerSettings, _T("Failed to copy viewer settings. %s (ErrorCode: 0x%08x)\n"), szErrorBuff, Ptx_GetLastError());
        GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdf_Document_SetViewerSettings(pOutDoc, pOutViewerSettings), _T("Failed to set viewer settings. %s (ErrorCode: 0x%08x)\n"), szErrorBuff, Ptx_GetLastError());
    }
    else
        GOTO_CLEANUP_IF_ERROR_PRINT_ERROR(_T("Failed to get viewer settings. %s (ErrorCode: 0x%08x)"), szErrorBuff, Ptx_GetLastError());

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    pInFileRefList = PtxPdf_Document_GetAssociatedFiles(pInDoc);
    GOTO_CLEANUP_IF_ERROR_PRINT_ERROR(_T("Failed to get associated files of input document. %s (ErrorCode: 0x%08x)\n"), szErrorBuff, Ptx_GetLastError());
    pOutFileRefList = PtxPdf_Document_GetAssociatedFiles(pOutDoc);
    GOTO_CLEANUP_IF_ERROR_PRINT_ERROR(_T("Failed to get associated files of output document. %s (ErrorCode: 0x%08x)\n"), szErrorBuff, Ptx_GetLastError());
    int nFileRefs = PtxPdf_FileReferenceList_GetCount(pInFileRefList);
    GOTO_CLEANUP_IF_ERROR_PRINT_ERROR(_T("Failed to get count of associated files. %s (ErrorCode: 0x%08x)\n"), szErrorBuff, Ptx_GetLastError());
    for (int iFileRef = 0; iFileRef < nFileRefs; iFileRef++)
    {
        pInFileRef = PtxPdf_FileReferenceList_Get(pInFileRefList, iFileRef);
        GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInFileRef, _T("Failed to get file reference. %s (ErrorCode: 0x%08x)\n"), szErrorBuff, Ptx_GetLastError());
        pOutFileRef = PtxPdf_FileReference_Copy(pOutDoc, pInFileRef);
        GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutFileRef, _T("Failed to copy file reference. %s (ErrorCode: 0x%08x)\n"), szErrorBuff, Ptx_GetLastError());
        GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdf_FileReferenceList_Add(pOutFileRefList, pOutFileRef), _T("Failed to add file reference. %s (ErrorCode: 0x%08x)\n"), szErrorBuff, Ptx_GetLastError());
        Ptx_Release(pInFileRef);
        pInFileRef = NULL;
        Ptx_Release(pOutFileRef);
        pOutFileRef = NULL;
    }
    Ptx_Release(pInFileRefList);
    pInFileRefList = NULL;
    Ptx_Release(pOutFileRefList);
    pOutFileRefList = NULL;

    // Plain embedded files
    pInFileRefList = PtxPdf_Document_GetPlainEmbeddedFiles(pInDoc);
    GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInFileRefList, _T("Failed to get plain embedded files of input document %s (ErrorCode: 0x%08x)\n"), szErrorBuff, Ptx_GetLastError());
    pOutFileRefList = PtxPdf_Document_GetPlainEmbeddedFiles(pOutDoc);
    GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInFileRefList, _T("Failed to get plain embedded files of output document %s (ErrorCode: 0x%08x)\n"), szErrorBuff, Ptx_GetLastError());
    nFileRefs = PtxPdf_FileReferenceList_GetCount(pInFileRefList);
    GOTO_CLEANUP_IF_ERROR_PRINT_ERROR(_T("Failed to get count of plain embedded files. %s (ErrorCode: 0x%08x)\n"), szErrorBuff, Ptx_GetLastError());
    for (int iFileRef = 0; iFileRef < nFileRefs; iFileRef++)
    {
        pInFileRef = PtxPdf_FileReferenceList_Get(pInFileRefList, iFileRef);
        GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInFileRef, _T("Failed to get file reference. %s (ErrorCode: 0x%08x)\n"), szErrorBuff, Ptx_GetLastError());
        pOutFileRef = PtxPdf_FileReference_Copy(pOutDoc, pInFileRef);
        GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutFileRef, _T("Failed to copy file reference. %s (ErrorCode: 0x%08x)\n"), szErrorBuff, Ptx_GetLastError());
        GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdf_FileReferenceList_Add(pOutFileRefList, pOutFileRef), _T("Failed to add file reference. %s (ErrorCode: 0x%08x)\n"), szErrorBuff, Ptx_GetLastError());
        Ptx_Release(pInFileRef);
        pInFileRef = NULL;
        Ptx_Release(pOutFileRef);
        pOutFileRef = NULL;
    }

cleanup:
    if (pInOutputIntent != NULL) Ptx_Release(pInOutputIntent);
    if (pOutOutputIntent != NULL) Ptx_Release(pOutOutputIntent);
    if (pInMetadata != NULL) Ptx_Release(pInMetadata);
    if (pOutMetadata != NULL) Ptx_Release(pOutMetadata);
    if (pInViewerSettings != NULL) Ptx_Release(pInViewerSettings);
    if (pOutViewerSettings != NULL) Ptx_Release(pOutViewerSettings);
    if (pInFileRefList != NULL) Ptx_Release(pInFileRefList);
    if (pOutFileRefList != NULL) Ptx_Release(pOutFileRefList);
    if (pInFileRef != NULL) Ptx_Release(pInFileRef);
    if (pOutFileRef != NULL) Ptx_Release(pOutFileRef);
    return iReturnValue;
}

int StampPageNumber(TPtxPdf_Document* pDocument, TPtxPdfContent_Font* pFont, TPtxPdfContent_ContentGenerator* pGenerator, int nPageNo, BOOL bIsLeftPage)
{
    // Objects that need releasing or closing
    TPtxPdfContent_Text* pText = NULL;
    TPtxPdfContent_TextGenerator* pTextGenerator = NULL;

    // Create text object
    pText = PtxPdfContent_Text_Create(pDocument);
    GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pText, _T("Failed to create text object. %s (ErrorCode: 0x%08x)\n"), szErrorBuff, Ptx_GetLastError());

    // Create text generator
    pTextGenerator = PtxPdfContent_TextGenerator_New(pText, pFont, 8.0, NULL);
    GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pTextGenerator, _T("Failed to create text generator. %s (ErrorCode: 0x%08x)\n"), szErrorBuff, Ptx_GetLastError());

    TCHAR szStampText[50];
    _stprintf(szStampText, _T("Page %d"), nPageNo);

    // Get width of stamp text
    double dStampWidth = PtxPdfContent_TextGenerator_GetWidth(pTextGenerator, szStampText);
    if (dStampWidth == 0.0)
        GOTO_CLEANUP_IF_ERROR_PRINT_ERROR(_T("Failed to get text width. %s (ErrorCode: 0x%08x)\n"), szErrorBuff, Ptx_GetLastError());

    // Compute position
    TPtxGeomReal_Point point =
    {
        .dX = bIsLeftPage ? dBorder + 0.5 * dCellWidth - dStampWidth / 2 :
                            2 * dBorder + 1.5 * dCellWidth - dStampWidth / 2,
        .dY = dBorder,
    };

    // Move to position
    GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdfContent_TextGenerator_MoveTo(pTextGenerator, &point), _T("Failed to move to position. %s (ErrorCode: 0x%08x)\n"), szErrorBuff, Ptx_GetLastError());
    // Add page number
    GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdfContent_TextGenerator_Show(pTextGenerator, szStampText), _T("Failed to show text. %s (ErrorCode: 0x%08x)\n"), szErrorBuff, Ptx_GetLastError());

    BOOL bClose = PtxPdfContent_TextGenerator_Close(pTextGenerator);
    pTextGenerator = NULL;
    GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(bClose, _T("Failed to close text generator. %s (ErrorCode: 0x%08x)\n"), szErrorBuff, Ptx_GetLastError());

    // Paint the positioned text
    GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdfContent_ContentGenerator_PaintText(pGenerator, pText), _T("Failed to paint text. %s (ErrorCode: 0x%08x)\n"), szErrorBuff, Ptx_GetLastError());

cleanup:
    if (pText != NULL) Ptx_Release(pText);
    if (pTextGenerator != NULL) PtxPdfContent_TextGenerator_Close(pTextGenerator);
    return iReturnValue;
}

void ComputeTargetRect(TPtxGeomReal_Rectangle* pRectangle, const TPtxGeomReal_Size* pBBox, BOOL bIsLeftPage)
{
    // Compute factor for fitting page into rectangle
    double dScale = MIN(dCellWidth / pBBox->dWidth, dCellHeight / pBBox->dHeight);
    double dGroupWidth = pBBox->dWidth * dScale;
    double dGroupHeight = pBBox->dHeight * dScale;

    // Compute x-value
    double dGroupXPos = bIsLeftPage ? dCellLeft + (dCellWidth - dGroupWidth) / 2 :
                                      dCellRight + (dCellWidth - dGroupWidth) / 2;

    // Compute y-value
    double dGroupYPos = dCellYPos + (dCellHeight - dGroupHeight) / 2;

    // Set rectangle
    pRectangle->dLeft = dGroupXPos;
    pRectangle->dBottom = dGroupYPos;
    pRectangle->dRight = dGroupXPos + dGroupWidth;
    pRectangle->dTop = dGroupYPos + dGroupHeight;
}

int CreateBooklet(TPtxPdf_PageList* pInDocList, TPtxPdf_Document* pOutDoc, TPtxPdf_PageList* pOutDocList, int nLeftPageIndex, int nRightPageIndex, TPtxPdfContent_Font* pFont)
{
    // Objects that need releasing or closing
    TPtxPdf_PageCopyOptions* pCopyOptions = NULL;
    TPtxPdf_Page* pOutPage = NULL;
    TPtxPdfContent_Content* pContent = NULL;
    TPtxPdfContent_ContentGenerator* pGenerator = NULL;
    TPtxPdf_Page* pInPage = NULL;
    TPtxPdfContent_Group* pGroup = NULL;

    // Configure copy options
    pCopyOptions = PtxPdf_PageCopyOptions_New();

    // Create page object
    pOutPage = PtxPdf_Page_Create(pOutDoc, &pageSize);
    GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutPage, _T("Failed to create page object. %s (ErrorCode: 0x%08x)\n"), szErrorBuff, Ptx_GetLastError());

    // Create content generator
    pContent = PtxPdf_Page_GetContent(pOutPage);
    GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pContent, _T("Failed to get content. %s (ErrorCode: 0x%08x)\n"), szErrorBuff, Ptx_GetLastError());
    pGenerator = PtxPdfContent_ContentGenerator_New(pContent, FALSE);
    GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pGenerator, _T("Failed to create content generator. %s (ErrorCode: 0x%08x)\n"), szErrorBuff, Ptx_GetLastError());

    int nPageCount = PtxPdf_PageList_GetCount(pInDocList);
    GOTO_CLEANUP_IF_ERROR_PRINT_ERROR(_T("Failed to get page list count. %s (ErrorCode: 0x%08x)\n"), szErrorBuff, Ptx_GetLastError());

    // Left page
    if (nLeftPageIndex < nPageCount)
    {
        // Get the input page
        pInPage = PtxPdf_PageList_Get(pInDocList, nLeftPageIndex);
        GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInPage, _T("Failed to get page. %s (ErrorCode: 0x%08x)\n"), szErrorBuff, Ptx_GetLastError());

        // Copy page from input to output
        pGroup = PtxPdfContent_Group_CopyFromPage(pOutDoc, pInPage, pCopyOptions);
        GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pGroup, _T("Failed to copy page as group. %s (ErrorCode: 0x%08x)\n"), szErrorBuff, Ptx_GetLastError());

        // Compute group location
        TPtxGeomReal_Size groupSize;
        GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdfContent_Group_GetSize(pGroup, &groupSize), _T("Failed to get group size. %s (ErrorCode: 0x%08x)\n"), szErrorBuff, Ptx_GetLastError());
        TPtxGeomReal_Rectangle targetRect;
        ComputeTargetRect(&targetRect, &groupSize, TRUE);

        // Paint group at location
        GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdfContent_ContentGenerator_PaintGroup(pGenerator, pGroup, &targetRect, NULL), _T("Failed to paint group. %s (ErrorCode: 0x%08x)\n"), szErrorBuff, Ptx_GetLastError());

        // Add page number to page
        if (StampPageNumber(pOutDoc, pFont, pGenerator, nLeftPageIndex + 1, TRUE) != 0)
            goto cleanup;

        Ptx_Release(pInPage);
        pInPage = NULL;
        Ptx_Release(pGroup);
        pGroup = NULL;
    }

    // Right page
    if (nRightPageIndex < nPageCount)
    {
        // Get the input Page
        pInPage = PtxPdf_PageList_Get(pInDocList, nRightPageIndex);
        GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInPage, _T("Failed to get page. %s (ErrorCode: 0x%08x)\n"), szErrorBuff, Ptx_GetLastError());

        // Copy page from input to output
        pGroup = PtxPdfContent_Group_CopyFromPage(pOutDoc, pInPage, pCopyOptions);
        GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pGroup, _T("Failed to copy page as group. %s (ErrorCode: 0x%08x)\n"), szErrorBuff, Ptx_GetLastError());

        // Compute group location
        TPtxGeomReal_Size groupSize;
        PtxPdfContent_Group_GetSize(pGroup, &groupSize);
        GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdfContent_Group_GetSize(pGroup, &groupSize), _T("Failed to get group size. %s (ErrorCode: 0x%08x)\n"), szErrorBuff, Ptx_GetLastError());
        TPtxGeomReal_Rectangle targetRect;
        ComputeTargetRect(&targetRect, &groupSize, FALSE);

        // Paint group on the Computed rectangle
        GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdfContent_ContentGenerator_PaintGroup(pGenerator, pGroup, &targetRect, NULL), _T("Failed to paint group. %s (ErrorCode: 0x%08x)\n"), szErrorBuff, Ptx_GetLastError());

        // Add page number to page
        if (StampPageNumber(pOutDoc, pFont, pGenerator, nRightPageIndex + 1, FALSE) != 0)
            goto cleanup;
    }

    BOOL bClose = PtxPdfContent_ContentGenerator_Close(pGenerator);
    pGenerator = NULL;
    GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(bClose, _T("Failed to close content generator. %s (ErrorCode: 0x%08x)\n"), szErrorBuff, Ptx_GetLastError());

    // Add page to output document
    GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdf_PageList_Add(pOutDocList, pOutPage), _T("Failed to add page to output document. %s (ErrorCode: 0x%08x)\n"), szErrorBuff, Ptx_GetLastError());

cleanup:
    if (pGenerator != NULL) PtxPdfContent_ContentGenerator_Close(pGenerator);
    if (pCopyOptions != NULL) Ptx_Release(pCopyOptions);
    if (pOutPage != NULL) Ptx_Release(pOutPage);
    if (pContent != NULL) Ptx_Release(pContent);
    if (pInPage != NULL) Ptx_Release(pInPage);
    if (pGroup != NULL) Ptx_Release(pGroup);
    return iReturnValue;
}

// Open input document
using (Stream inStream = new FileStream(inPath, FileMode.Open, FileAccess.Read))
using (Document inDoc = Document.Open(inStream, null))

// Create output document 
using (Stream outStream = new FileStream(outPath, FileMode.Create, FileAccess.ReadWrite))
using (Document outDoc = Document.Create(outStream, inDoc.Conformance, null))
{
    // Copy document-wide data
    CopyDocumentData(inDoc, outDoc);

    // Define page copy options
    PageCopyOptions copyOptions = new PageCopyOptions();

    // Copy pages
    foreach (Page inPage in inDoc.Pages)
    {
        Page outPage = null;
        Size pageSize = inPage.Size;

        bool rotate = AllowRotate &&
            (pageSize.Height >= pageSize.Width) != (TargetSize.Height >= TargetSize.Width);
        Size rotatedSize = pageSize;

        if (rotate)
            rotatedSize = new Size { Width = pageSize.Height, Height = pageSize.Width };

        if (rotatedSize.Width == TargetSize.Width && rotatedSize.Height == TargetSize.Width)
        {
            // If size is correct, copy page only
            outPage = Page.Copy(outDoc, inPage, copyOptions);

            if (rotate)
                outPage.Rotate(Rotation.Clockwise);
        }
        else
        {
            // Create new page of correct size and fit existing page onto it
            outPage = Page.Create(outDoc, TargetSize);

            // Copy page as group
            Group group = Group.CopyFromPage(outDoc, inPage, copyOptions);
            // Calculate scaling and position of group
            double scale = Math.Min(TargetSize.Width / rotatedSize.Width,
                TargetSize.Height / rotatedSize.Height);

            // Calculate position
            Point position = new Point
            {
                X = (TargetSize.Width - pageSize.Width * scale) / 2,
                Y = (TargetSize.Height - pageSize.Height * scale) / 2
            };

            // Create content generator
            using ContentGenerator generator = new ContentGenerator(outPage.Content, false);

            // Calculate and apply transformation
            AffineTransform transform = AffineTransform.Identity;
            transform.Translate(position.X, position.Y);
            transform.Scale(scale, scale);

            Point point = new Point()
            {
                X = pageSize.Width / 2.0,
                Y = pageSize.Height / 2.0
            };

            // Rotate input file 
            if (rotate)
                transform.Rotate(90, point);
            generator.Transform(transform);

            // Paint group
            generator.PaintGroup(group, null, null);
        }
        // Add page to output document 
        outDoc.Pages.Add(outPage);
    }
}

private static void CopyDocumentData(Document inDoc, Document outDoc)
{
    // Copy document-wide data

    // Output intent
    if (inDoc.OutputIntent != null)
        outDoc.OutputIntent = IccBasedColorSpace.Copy(outDoc, inDoc.OutputIntent);

    // Metadata
    outDoc.Metadata = Metadata.Copy(outDoc, inDoc.Metadata);

    // Viewer settings
    outDoc.ViewerSettings = ViewerSettings.Copy(outDoc, inDoc.ViewerSettings);

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.AssociatedFiles;
    foreach (FileReference inFileRef in inDoc.AssociatedFiles)
        outAssociatedFiles.Add(FileReference.Copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.PlainEmbeddedFiles;
    foreach (FileReference inFileRef in inDoc.PlainEmbeddedFiles)
        outEmbeddedFiles.Add(FileReference.Copy(outDoc, inFileRef));
}

try (// Open input document
    FileStream inStream = new FileStream(inPath, FileStream.Mode.READ_ONLY);
    Document inDoc = Document.open(inStream, null);
    FileStream outStream = new FileStream(outPath, FileStream.Mode.READ_WRITE_NEW)) {
    try (// Create output document
        Document outDoc = Document.create(outStream, inDoc.getConformance(), null)) {

        // Copy document-wide data
        copyDocumentData(inDoc, outDoc);

        // Define page copy options
        PageCopyOptions copyOptions = new PageCopyOptions();

        // Copy pages
        for (Page inPage : inDoc.getPages()) {
            Page outPage = null;
            Size pageSize = inPage.getSize();

            boolean rotate = AllowRotate &&
                (pageSize.height >= pageSize.width) != (TargetHeight >= TargetWidth);
            Size rotatedSize = pageSize;

            if (rotate)
                rotatedSize = new Size(pageSize.height, pageSize.width);

            if (rotatedSize.width == TargetWidth && rotatedSize.height == TargetWidth) {
                // If size is correct, copy page only
                outPage = Page.copy(outDoc, inPage, copyOptions);

                if (rotate)
                    outPage.rotate(Rotation.CLOCKWISE);
            } else {
                // Create new page of correct size and fit existing page onto it
                outPage = Page.create(outDoc, new Size(TargetWidth, TargetHeight));

                // Copy page as group
                Group group = Group.copyFromPage(outDoc, inPage, copyOptions);
                // Calculate scaling and position of group
                double scale = Math.min(TargetWidth / rotatedSize.width,
                    TargetHeight / rotatedSize.height);

                // Calculate position
                Point position = new Point(
                        (TargetWidth - pageSize.width * scale) / 2,
                        (TargetHeight - pageSize.height * scale) / 2);

                try(// Create content generator
                    ContentGenerator generator = new ContentGenerator(outPage.getContent(), false)) {
                    // Calculate and apply transformation
                    AffineTransform transform = AffineTransform.getIdentity();
                    transform.translate(position.x, position.y);
                    transform.scale(scale, scale);

                    Point point = new Point(pageSize.width / 2.0, pageSize.height / 2.0);

                    // Rotate input file 
                    if (rotate)
                        transform.rotate(90, point);
                    generator.transform(transform);

                    // Paint group
                    generator.paintGroup(group, null, null);
                }
            }
            // Add page to output document 
            outDoc.getPages().add(outPage);
        }
    }
}

private static void copyDocumentData(Document inDoc, Document outDoc) throws PdfToolboxException, IOException {
    // Copy document-wide data

    // Output intent
    if (inDoc.getOutputIntent() != null)
        outDoc.setOutputIntent(IccBasedColorSpace.copy(outDoc, inDoc.getOutputIntent()));

    // Metadata
    outDoc.setMetadata(Metadata.copy(outDoc, inDoc.getMetadata()));

    // Viewer settings
    outDoc.setViewerSettings(ViewerSettings.copy(outDoc, inDoc.getViewerSettings()));

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.getAssociatedFiles();
    for (FileReference inFileRef : inDoc.getAssociatedFiles())
        outAssociatedFiles.add(FileReference.copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.getPlainEmbeddedFiles();
    for (FileReference inFileRef : inDoc.getPlainEmbeddedFiles())
        outEmbeddedFiles.add(FileReference.copy(outDoc, inFileRef));
}

// Open input document
pInStream = _tfopen(szInPath, _T("rb"));
GOTO_CLEANUP_IF_NULL(pInStream, _T("Failed to open input file \"%s\".\n"), szInPath);
PtxSysCreateFILEStreamDescriptor(&descriptor, pInStream, 0);
pInDoc = PtxPdf_Document_Open(&descriptor, _T(""));
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInDoc, _T("Input file \"%s\" cannot be opened. %s (ErrorCode: 0x%08x).\n"), szInPath, szErrorBuff, Ptx_GetLastError());

// Create output document
pOutStream = _tfopen(szOutPath, _T("wb+"));
GOTO_CLEANUP_IF_NULL(pOutStream, _T("Failed to open output file \"%s\".\n"), szOutPath);
PtxSysCreateFILEStreamDescriptor(&outDescriptor, pOutStream, 0);
iConformance = PtxPdf_Document_GetConformance(pInDoc);
pOutDoc = PtxPdf_Document_Create(&outDescriptor, &iConformance, NULL);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutDoc, _T("Output file \"%s\" cannot be created. %s (ErrorCode: 0x%08x).\n"), szOutPath, szErrorBuff, Ptx_GetLastError());

// Copy document-wide data
GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(copyDocumentData(pInDoc, pOutDoc), _T("Failed to copy document-wide data. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Configure copy options
pCopyOptions = PtxPdf_PageCopyOptions_New();

// Copy all pages
pInPageList = PtxPdf_Document_GetPages(pInDoc);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInPageList, _T("Failed to get pages of the input document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
pOutPageList = PtxPdf_Document_GetPages(pOutDoc);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutPageList, _T("Failed to get pages of the output document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
for (int iPage = 0; iPage < PtxPdf_PageList_GetCount(pInPageList); iPage++)
{
    TPtxGeomReal_Size pageSize;
    TPtxGeomReal_Size rotatedSize;
    BOOL bRotate;

    pInPage = PtxPdf_PageList_Get(pInPageList, iPage);
    GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInPage, _T("%s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

    pOutPage = NULL;
    GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdf_Page_GetSize(pInPage, &pageSize), _T("%s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

    bRotate = bAllowRotate && (pageSize.dHeight >= pageSize.dWidth) != (targetSize.dHeight >= targetSize.dWidth);
    if (bRotate)
    {
        rotatedSize.dWidth = pageSize.dHeight;
        rotatedSize.dHeight = pageSize.dHeight;
    }
    else
    {
        rotatedSize = pageSize;
    }

    if (rotatedSize.dWidth == targetSize.dWidth && rotatedSize.dHeight == targetSize.dWidth)
    {
        // If size is correct, copy page only
        pOutPage = PtxPdf_Page_Copy(pOutDoc, pInPage, pCopyOptions);
        GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutPage, _T("Failed to copy pages from input to output. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

        if (bRotate)
        {
            GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdf_Page_Rotate(pOutPage, ePtxGeom_Rotation_Clockwise), _T("Failed to rotate page. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
        }
    }
    else
    {
        TPtxPdfContent_Group* pGroup = NULL;
        TPtxPdfContent_Content* pContent = NULL;
        TPtxGeomReal_AffineTransform transform;
        TPtxGeomReal_Point position;
        TPtxGeomReal_Point point;

        // Create a new page of correct size and fit existing page onto it
        pOutPage = PtxPdf_Page_Create(pOutDoc, &targetSize);
        GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutPage, _T("Failed to create a new page. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

        // Copy page as group
        pGroup = PtxPdfContent_Group_CopyFromPage(pOutDoc, pInPage, pCopyOptions);
        GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pGroup, _T("Failed to copy page as group. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

        // Calculate scaling and position of group
        double scale = MIN(targetSize.dWidth / rotatedSize.dWidth, targetSize.dHeight / rotatedSize.dHeight);

        // Calculate position
        position.dX = (targetSize.dWidth - pageSize.dWidth * scale) / 2;
        position.dY = (targetSize.dHeight - pageSize.dHeight * scale) / 2;

        pContent = PtxPdf_Page_GetContent(pOutPage);

        // Create content generator
        pGenerator = PtxPdfContent_ContentGenerator_New(pContent, FALSE);
        GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pGenerator, _T("Failed to create a content generator. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

        // Calculate and apply transformation
        GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxGeomReal_AffineTransform_GetIdentity(&transform), _T("%s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
        GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxGeomReal_AffineTransform_Translate(&transform, position.dX, position.dY), _T("%s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
        GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxGeomReal_AffineTransform_Scale(&transform, scale, scale), _T("%s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

        point.dX = pageSize.dWidth / 2.0;
        point.dY = pageSize.dHeight / 2.0;

        // Rotate input file
        if (bRotate)
        {
            GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxGeomReal_AffineTransform_Rotate(&transform, 90, &point), _T("%s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
        }
        GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdfContent_ContentGenerator_Transform(pGenerator, &transform), _T("%s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

        // Paint form
        GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdfContent_ContentGenerator_PaintGroup(pGenerator, pGroup, NULL, NULL), _T("Failed to paint the group. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

        PtxPdfContent_ContentGenerator_Close(pGenerator);
        pGenerator = NULL;

        if (pGenerator != NULL)
            Ptx_Release(pGenerator);
        if (pGroup != NULL)
            Ptx_Release(pGroup);
    }

    // Add page to output document
    GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdf_PageList_Add(pOutPageList, pOutPage), _T("Failed to add page to output document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

    if (pOutPage != NULL)
    {
        Ptx_Release(pOutPage);
        pOutPage = NULL;
    }

    if (pInPage != NULL)
    {
        Ptx_Release(pInPage);
        pInPage = NULL;
    }
}

int copyDocumentData(TPtxPdf_Document * pInDoc, TPtxPdf_Document * pOutDoc)
{
    TPtxPdf_FileReferenceList* pInFileRefList;
    TPtxPdf_FileReferenceList* pOutFileRefList;

    // Output intent
    if (PtxPdf_Document_GetOutputIntent(pInDoc) != NULL)
        if (PtxPdf_Document_SetOutputIntent(pOutDoc, PtxPdfContent_IccBasedColorSpace_Copy(pOutDoc, PtxPdf_Document_GetOutputIntent(pInDoc))) == FALSE)
            return FALSE;

    // Metadata
    if (PtxPdf_Document_SetMetadata(pOutDoc, PtxPdf_Metadata_Copy(pOutDoc, PtxPdf_Document_GetMetadata(pInDoc))) == FALSE)
        return FALSE;

    // Viewer settings
    if (PtxPdf_Document_SetViewerSettings(pOutDoc, PtxPdfNav_ViewerSettings_Copy(pOutDoc, PtxPdf_Document_GetViewerSettings(pInDoc))) == FALSE)
        return FALSE;

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    pInFileRefList = PtxPdf_Document_GetAssociatedFiles(pInDoc);
    pOutFileRefList = PtxPdf_Document_GetAssociatedFiles(pOutDoc);
    if (pInFileRefList == NULL || pOutFileRefList == NULL)
        return FALSE;
    for (int iFileRef = 0; iFileRef < PtxPdf_FileReferenceList_GetCount(pInFileRefList); iFileRef++)
        if (PtxPdf_FileReferenceList_Add(pOutFileRefList, PtxPdf_FileReference_Copy(pOutDoc, PtxPdf_FileReferenceList_Get(pInFileRefList, iFileRef))) == FALSE)
            return FALSE;

    // Plain embedded files
    pInFileRefList = PtxPdf_Document_GetPlainEmbeddedFiles(pInDoc);
    pOutFileRefList = PtxPdf_Document_GetPlainEmbeddedFiles(pOutDoc);
    if (pInFileRefList == NULL || pOutFileRefList == NULL)
        return FALSE;
    for (int iFileRef = 0; iFileRef < PtxPdf_FileReferenceList_GetCount(pInFileRefList); iFileRef++)
        if (PtxPdf_FileReferenceList_Add(pOutFileRefList, PtxPdf_FileReference_Copy(pOutDoc, PtxPdf_FileReferenceList_Get(pInFileRefList, iFileRef))) == FALSE)
            return FALSE;

    return TRUE;
}

// Open input document
using (Stream inStream = new FileStream(inPath, FileMode.Open, FileAccess.Read))
using (Document inDoc = Document.Open(inStream, null))
{
    // Create output document 
    using Stream outStream = new FileStream(outPath, FileMode.Create, FileAccess.ReadWrite);
    using Document outDoc = Document.Create(outStream, inDoc.Conformance, null);
    PageList outPages = outDoc.Pages;
    int pageCount = 0;
    ContentGenerator generator = null;
    Page outPage = null;

    // Copy document-wide data
    CopyDocumentData(inDoc, outDoc);

    // Copy all pages from input document
    foreach (Page inPage in inDoc.Pages)
    {
        if (pageCount == Nx * Ny)
        {
            // Add to output document
            generator.Dispose();
            outPages.Add(outPage);
            outPage = null;
            pageCount = 0;
        }
        if (outPage == null)
        {
            // Create a new output page
            outPage = Page.Create(outDoc, PageSize);
            generator = new ContentGenerator(outPage.Content, false);
        }

        // Get area where group has to be
        int x = pageCount % Nx;
        int y = Ny - (pageCount / Nx) - 1;

        // Compute cell size
        Size cellSize = new Size
        {
            Width = (PageSize.Width - ((Nx + 1) * Border)) / Nx,
            Height = (PageSize.Height - ((Ny + 1) * Border)) / Ny
        };

        // Compute cell position
        Point cellPosition = new Point
        {
            X = Border + x * (cellSize.Width + Border),
            Y = Border + y * (cellSize.Height + Border)
        };

        // Define page copy options
        PageCopyOptions copyOptions = new PageCopyOptions();

        // Copy page as group from input to output
        Group group = Group.CopyFromPage(outDoc, inPage, copyOptions);

        // Compute group position 
        Size groupSize = group.Size;
        double scale = Math.Min(cellSize.Width / groupSize.Width,
            cellSize.Height / groupSize.Height);

        // Compute target size
        Size targetSize = new Size
        {
            Width = groupSize.Width * scale,
            Height = groupSize.Height * scale
        };

        // Compute position
        Point targetPos = new Point
        {
            X = cellPosition.X + ((cellSize.Width - targetSize.Width) / 2),
            Y = cellPosition.Y + ((cellSize.Height - targetSize.Height) / 2)
        };

        // Compute rectangle
        Rectangle targetRect = new Rectangle
        {
            Left = targetPos.X,
            Bottom = targetPos.Y,
            Right = targetPos.X + targetSize.Width,
            Top = targetPos.Y + targetSize.Height
        };

        // Add group to page
        generator.PaintGroup(group, targetRect, null);
        pageCount++;
    }
    // Add page
    if (outPage != null)
    {
        generator.Dispose();
        outPages.Add(outPage);
    }
}

private static void CopyDocumentData(Document inDoc, Document outDoc)
{
    // Copy document-wide data

    // Output intent
    if (inDoc.OutputIntent != null)
        outDoc.OutputIntent = IccBasedColorSpace.Copy(outDoc, inDoc.OutputIntent);

    // Metadata
    outDoc.Metadata = Metadata.Copy(outDoc, inDoc.Metadata);

    // Viewer settings
    outDoc.ViewerSettings = ViewerSettings.Copy(outDoc, inDoc.ViewerSettings);

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.AssociatedFiles;
    foreach (FileReference inFileRef in inDoc.AssociatedFiles)
        outAssociatedFiles.Add(FileReference.Copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.PlainEmbeddedFiles;
    foreach (FileReference inFileRef in inDoc.PlainEmbeddedFiles)
        outEmbeddedFiles.Add(FileReference.Copy(outDoc, inFileRef));
}

try (// Open input document
    FileStream inStream = new FileStream(inPath, FileStream.Mode.READ_ONLY);
    Document inDoc = Document.open(inStream, null)) {
    try (
        FileStream outStream = new FileStream(outPath, FileStream.Mode.READ_WRITE_NEW)) {
        try (// Create output document
            Document outDoc = Document.create(outStream, inDoc.getConformance(), null)) {
            PageList outPages = outDoc.getPages();
            int pageCount = 0;
            ContentGenerator generator = null;
            Page outPage = null;

            // A4 portrait
            Size pageSize = new Size(595, 842);

            // Copy document-wide data
            copyDocumentData(inDoc, outDoc);

            // Copy pages
            for (Page inPage : inDoc.getPages()) {

                if (pageCount == Nx * Ny) {
                    // Add to output document
                    generator.close();
                    outPages.add(outPage);
                    outPage = null;
                    pageCount = 0;
                }
                if (outPage == null) {
                    // Create a new output page
                    outPage = Page.create(outDoc, pageSize);
                    generator = new ContentGenerator(outPage.getContent(), false);
                }

                // Get area where group has to be
                int x = pageCount % Nx;
                int y = Ny - (pageCount / Nx) - 1;

                // Calculate cell size
                Size cellSize = new Size((pageSize.width - ((Nx + 1) * Border)) / Nx,
                        (pageSize.height - ((Ny + 1) * Border)) / Ny);

                // Calculate cell position
                Point cellPosition = new Point(Border + x * (cellSize.width + Border),
                        Border + y * (cellSize.height + Border));

                // Set copy option
                PageCopyOptions copyOptions = new PageCopyOptions();

                // Copy page group from input to output
                Group group = Group.copyFromPage(outDoc, inPage, copyOptions);

                // Calculate group position
                Size groupSize = group.getSize();
                double scale = Math.min(cellSize.width / groupSize.width,
                        cellSize.height / groupSize.height);

                // Calculate target size
                Size targetSize = new Size(groupSize.width * scale, groupSize.height * scale);

                // Calculate position
                Point targetPos = new Point(cellPosition.x + ((cellSize.width - targetSize.width) / 2),
                        cellPosition.y + ((cellSize.height - targetSize.height) / 2));

                // Calculate rectangle
                Rectangle targetRect = new Rectangle(targetPos.x, targetPos.y,
                        targetPos.x + targetSize.width, targetPos.y + targetSize.height);

                // Add group to page
                generator.paintGroup(group, targetRect, null);

                pageCount++;
            }
            // Add page
            if (outPage != null) {
                generator.close();
                outPages.add(outPage);
            }
        }
    }
}

private static void copyDocumentData(Document inDoc, Document outDoc) throws PdfToolboxException, IOException {
    // Copy document-wide data

    // Output intent
    if (inDoc.getOutputIntent() != null)
        outDoc.setOutputIntent(IccBasedColorSpace.copy(outDoc, inDoc.getOutputIntent()));

    // Metadata
    outDoc.setMetadata(Metadata.copy(outDoc, inDoc.getMetadata()));

    // Viewer settings
    outDoc.setViewerSettings(ViewerSettings.copy(outDoc, inDoc.getViewerSettings()));

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.getAssociatedFiles();
    for (FileReference inFileRef : inDoc.getAssociatedFiles())
        outAssociatedFiles.add(FileReference.copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.getPlainEmbeddedFiles();
    for (FileReference inFileRef : inDoc.getPlainEmbeddedFiles())
        outEmbeddedFiles.add(FileReference.copy(outDoc, inFileRef));
}

// Open input document
pInStream = _tfopen(szInPath, _T("rb"));
GOTO_CLEANUP_IF_NULL(pInStream, _T("Failed to open input file \"%s\".\n"), szInPath);
PtxSysCreateFILEStreamDescriptor(&descriptor, pInStream, 0);
pInDoc = PtxPdf_Document_Open(&descriptor, _T(""));
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInDoc, _T("Input file \"%s\" cannot be opened. %s (ErrorCode: 0x%08x).\n"), szInPath, szErrorBuff, Ptx_GetLastError());

// Create output document
pOutStream = _tfopen(szOutPath, _T("wb+"));
GOTO_CLEANUP_IF_NULL(pOutStream, _T("Failed to open output file \"%s\".\n"), szOutPath);
PtxSysCreateFILEStreamDescriptor(&outDescriptor, pOutStream, 0);
iConformance = PtxPdf_Document_GetConformance(pInDoc);
pOutDoc = PtxPdf_Document_Create(&outDescriptor, &iConformance, NULL);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutDoc, _T("Output file \"%s\" cannot be created. %s (ErrorCode: 0x%08x).\n"), szOutPath, szErrorBuff, Ptx_GetLastError());

// Copy document-wide data
GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(copyDocumentData(pInDoc, pOutDoc), _T("Failed to copy document-wide data. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Configure copy options
pCopyOptions = PtxPdf_PageCopyOptions_New();

// Copy all pages
pInPageList = PtxPdf_Document_GetPages(pInDoc);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInPageList, _T("Failed to get the pages of the input document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
pOutPageList = PtxPdf_Document_GetPages(pOutDoc);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutPageList, _T("Failed to get pages of the output document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
int nPageCount = 0;
for (int iPage = 0; iPage < PtxPdf_PageList_GetCount(pInPageList); iPage++)
{
    pInPage = PtxPdf_PageList_Get(pInPageList, iPage);

    if (nPageCount == nNx * nNy)
    {
        // Add to output document
        PtxPdfContent_ContentGenerator_Close(pGenerator);
        GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdf_PageList_Add(pOutPageList, pOutPage), _T("Failed to add page to output document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
        Ptx_Release(pOutPage);
        pOutPage = NULL;
        nPageCount = 0;
    }
    if (pOutPage == NULL)
    {
        // Create a new output page
        pOutPage = PtxPdf_Page_Create(pOutDoc, &PageSize);
        GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutPage, _T("Failed to create a new output page. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
        TPtxPdfContent_Content* pContent = PtxPdf_Page_GetContent(pOutPage);
        pGenerator = PtxPdfContent_ContentGenerator_New(pContent, FALSE);
        GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pGenerator, _T("Failed to create content generator. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
    }

    // Get area where group has to be
    int x = nPageCount % nNx;
    int y = nNy - (nPageCount / nNx) - 1;

    // Calculate cell size
    TPtxGeomReal_Size cellSize;
    cellSize.dWidth = (PageSize.dWidth - ((nNx + 1) * dBorder)) / nNx;
    cellSize.dHeight = (PageSize.dHeight - ((nNy + 1) * dBorder)) / nNy;

    // Calculate cell position
    TPtxGeomReal_Point cellPosition;
    cellPosition.dX = dBorder + x * (cellSize.dWidth + dBorder);
    cellPosition.dY = dBorder + y * (cellSize.dHeight + dBorder);

    // Copy page group from input to output
    pGroup = PtxPdfContent_Group_CopyFromPage(pOutDoc, pInPage, pCopyOptions);
    GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pGroup, _T("Failed to copy page group from input to output. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

    // Calculate group position
    TPtxGeomReal_Size groupSize;
    GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdfContent_Group_GetSize(pGroup, &groupSize), _T("%s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
    double dScale = MIN(cellSize.dWidth / groupSize.dWidth, cellSize.dHeight / groupSize.dHeight);

    // Calculate target size
    TPtxGeomReal_Size targetSize;
    targetSize.dWidth = groupSize.dWidth * dScale;
    targetSize.dHeight = groupSize.dHeight * dScale;

    // Calculate position
    TPtxGeomReal_Point targetPos;
    targetPos.dX = cellPosition.dX + ((cellSize.dWidth - targetSize.dWidth) / 2);
    targetPos.dY = cellPosition.dY + ((cellSize.dHeight - targetSize.dHeight) / 2);

    // Calculate rectangle
    TPtxGeomReal_Rectangle targetRect;
    targetRect.dLeft = targetPos.dX;
    targetRect.dBottom = targetPos.dY;
    targetRect.dRight = targetPos.dX + targetSize.dWidth;
    targetRect.dTop = targetPos.dY + targetSize.dHeight;

    // Add group to page
    GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdfContent_ContentGenerator_PaintGroup(pGenerator, pGroup, &targetRect, NULL), _T("Failed to paint the group. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

    if (pGroup != NULL)
    {
        Ptx_Release(pGroup);
        pGroup = NULL;
    }
    if (pInPage != NULL)
    {
        Ptx_Release(pInPage);
        pInPage = NULL;
    }

    nPageCount++;
}

// Add partially filled page
if (pOutPage != NULL)
{
    PtxPdfContent_ContentGenerator_Close(pGenerator);
    GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdf_PageList_Add(pOutPageList, pOutPage), _T("Failed to add page to output document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
    Ptx_Release(pOutPage);
    pOutPage = NULL;
}

int copyDocumentData(TPtxPdf_Document * pInDoc, TPtxPdf_Document * pOutDoc)
{
    TPtxPdf_FileReferenceList* pInFileRefList;
    TPtxPdf_FileReferenceList* pOutFileRefList;

    // Output intent
    if (PtxPdf_Document_GetOutputIntent(pInDoc) != NULL)
        if (PtxPdf_Document_SetOutputIntent(pOutDoc, PtxPdfContent_IccBasedColorSpace_Copy(pOutDoc, PtxPdf_Document_GetOutputIntent(pInDoc))) == FALSE)
            return FALSE;

    // Metadata
    if (PtxPdf_Document_SetMetadata(pOutDoc, PtxPdf_Metadata_Copy(pOutDoc, PtxPdf_Document_GetMetadata(pInDoc))) == FALSE)
        return FALSE;

    // Viewer settings
    if (PtxPdf_Document_SetViewerSettings(pOutDoc, PtxPdfNav_ViewerSettings_Copy(pOutDoc, PtxPdf_Document_GetViewerSettings(pInDoc))) == FALSE)
        return FALSE;

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    pInFileRefList = PtxPdf_Document_GetAssociatedFiles(pInDoc);
    pOutFileRefList = PtxPdf_Document_GetAssociatedFiles(pOutDoc);
    if (pInFileRefList == NULL || pOutFileRefList == NULL)
        return FALSE;
    for (int iFileRef = 0; iFileRef < PtxPdf_FileReferenceList_GetCount(pInFileRefList); iFileRef++)
        if (PtxPdf_FileReferenceList_Add(pOutFileRefList, PtxPdf_FileReference_Copy(pOutDoc, PtxPdf_FileReferenceList_Get(pInFileRefList, iFileRef))) == FALSE)
            return FALSE;

    // Plain embedded files
    pInFileRefList = PtxPdf_Document_GetPlainEmbeddedFiles(pInDoc);
    pOutFileRefList = PtxPdf_Document_GetPlainEmbeddedFiles(pOutDoc);
    if (pInFileRefList == NULL || pOutFileRefList == NULL)
        return FALSE;
    for (int iFileRef = 0; iFileRef < PtxPdf_FileReferenceList_GetCount(pInFileRefList); iFileRef++)
        if (PtxPdf_FileReferenceList_Add(pOutFileRefList, PtxPdf_FileReference_Copy(pOutDoc, PtxPdf_FileReferenceList_Get(pInFileRefList, iFileRef))) == FALSE)
            return FALSE;

    return TRUE;
}

// Open input document
using (Stream inStream = new FileStream(inPath, FileMode.Open, FileAccess.Read))
using (Document inDoc = Document.Open(inStream, null))

// Create output document
using (Stream outFs = new FileStream(outPath, FileMode.Create, FileAccess.ReadWrite))
using (Document outDoc = Document.Create(outFs, inDoc.Conformance, null))
{
    // Copy document-wide data
    CopyDocumentData(inDoc, outDoc);

    // Define page copy options
    PageCopyOptions copyOptions = new PageCopyOptions();

    // Copy all pages
    PageList copiedPages = PageList.Copy(outDoc, inDoc.Pages, copyOptions);

    // Rotate selected pages by 90 degrees
    foreach (var pageNumber in pageNumbers)
    {
        copiedPages[pageNumber - 1].Rotate(Rotation.Clockwise);
    }

    // Add pages to output document
    outDoc.Pages.AddRange(copiedPages);
}

private static void CopyDocumentData(Document inDoc, Document outDoc)
{
    // Copy document-wide data

    // Output intent
    if (inDoc.OutputIntent != null)
        outDoc.OutputIntent = IccBasedColorSpace.Copy(outDoc, inDoc.OutputIntent);

    // Metadata
    outDoc.Metadata = Metadata.Copy(outDoc, inDoc.Metadata);

    // Viewer settings
    outDoc.ViewerSettings = ViewerSettings.Copy(outDoc, inDoc.ViewerSettings);

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.AssociatedFiles;
    foreach (FileReference inFileRef in inDoc.AssociatedFiles)
        outAssociatedFiles.Add(FileReference.Copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.PlainEmbeddedFiles;
    foreach (FileReference inFileRef in inDoc.PlainEmbeddedFiles)
        outEmbeddedFiles.Add(FileReference.Copy(outDoc, inFileRef));
}

try (// Open input document
    FileStream inStream = new FileStream(inPath, FileStream.Mode.READ_ONLY);
    Document inDoc = Document.open(inStream, null);
    FileStream outStream = new FileStream(outPath, FileStream.Mode.READ_WRITE_NEW)) {
    try (// Create output document
        Document outDoc = Document.create(outStream, inDoc.getConformance(), null)) {

        // Copy document-wide data
        copyDocumentData(inDoc, outDoc);

        // Set copy options and flatten annotations, form fields and signatures
        PageCopyOptions copyOptions = new PageCopyOptions();

        // Copy all pages
        PageList copiedPages = PageList.copy(outDoc, inDoc.getPages(), copyOptions);

        // Rotate selected pages by 90 degrees
        for (int pageNumber : pageNumbers) {
            copiedPages.get(pageNumber - 1).rotate(Rotation.CLOCKWISE); 
        }

        // Add pages to output document
        outDoc.getPages().addAll(copiedPages);
    }
}

private static void copyDocumentData(Document inDoc, Document outDoc) throws PdfToolboxException, IOException {
    // Copy document-wide data

    // Output intent
    if (inDoc.getOutputIntent() != null)
        outDoc.setOutputIntent(IccBasedColorSpace.copy(outDoc, inDoc.getOutputIntent()));

    // Metadata
    outDoc.setMetadata(Metadata.copy(outDoc, inDoc.getMetadata()));

    // Viewer settings
    outDoc.setViewerSettings(ViewerSettings.copy(outDoc, inDoc.getViewerSettings()));

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.getAssociatedFiles();
    for (FileReference inFileRef : inDoc.getAssociatedFiles())
        outAssociatedFiles.add(FileReference.copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.getPlainEmbeddedFiles();
    for (FileReference inFileRef : inDoc.getPlainEmbeddedFiles())
        outEmbeddedFiles.add(FileReference.copy(outDoc, inFileRef));
}

// Open input document
pInStream = _tfopen(szInPath, _T("rb"));
GOTO_CLEANUP_IF_NULL(pInStream, _T("Failed to open input file \"%s\".\n"), szInPath);
PtxSysCreateFILEStreamDescriptor(&descriptor, pInStream, 0);
pInDoc = PtxPdf_Document_Open(&descriptor, _T(""));
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInDoc, _T("Input file \"%s\" cannot be opened. %s (ErrorCode: 0x%08x).\n"), szInPath, szErrorBuff, Ptx_GetLastError());

// Create output document
pOutStream = _tfopen(szOutPath, _T("wb+"));
GOTO_CLEANUP_IF_NULL(pOutStream, _T("Failed to open output file \"%s\".\n"), szOutPath);
PtxSysCreateFILEStreamDescriptor(&outDescriptor, pOutStream, 0);
iConformance = PtxPdf_Document_GetConformance(pInDoc);
pOutDoc = PtxPdf_Document_Create(&outDescriptor, &iConformance, NULL);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutDoc, _T("Output file \"%s\" cannot be created. %s (ErrorCode: 0x%08x).\n"), szOutPath, szErrorBuff, Ptx_GetLastError());

// Copy document-wide data
GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(copyDocumentData(pInDoc, pOutDoc), _T("Failed to copy document-wide data. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Configure copy options
pCopyOptions = PtxPdf_PageCopyOptions_New();

// Copy all pages
pInPageList = PtxPdf_Document_GetPages(pInDoc);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInPageList, _T("Failed to get the pages of the input document. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
pCopiedPages = PtxPdf_PageList_Copy(pOutDoc, pInPageList, pCopyOptions);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pCopiedPages, _T("Failed to copy pages. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

// Rotate given pages by 90 degrees
for (int i = 0; i < ARRAY_SIZE(aPageNumbers); i++)
{
    pOutPage = PtxPdf_PageList_Get(pCopiedPages, aPageNumbers[i] - 1);
    GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pOutPage, _T("Failed to get copied page. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
    GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdf_Page_Rotate(pOutPage, ePtxGeom_Rotation_Clockwise), _T("Failed to rotate page. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
}

// Add pages to output document
pOutPageList = PtxPdf_Document_GetPages(pOutDoc);
GOTO_CLEANUP_IF_FALSE_PRINT_ERROR(PtxPdf_PageList_AddRange(pOutPageList, pCopiedPages), _T("Failed to add copied pages. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

int copyDocumentData(TPtxPdf_Document * pInDoc, TPtxPdf_Document * pOutDoc)
{
    TPtxPdf_FileReferenceList* pInFileRefList;
    TPtxPdf_FileReferenceList* pOutFileRefList;

    // Output intent
    if (PtxPdf_Document_GetOutputIntent(pInDoc) != NULL)
        if (PtxPdf_Document_SetOutputIntent(pOutDoc, PtxPdfContent_IccBasedColorSpace_Copy(pOutDoc, PtxPdf_Document_GetOutputIntent(pInDoc))) == FALSE)
            return FALSE;

    // Metadata
    if (PtxPdf_Document_SetMetadata(pOutDoc, PtxPdf_Metadata_Copy(pOutDoc, PtxPdf_Document_GetMetadata(pInDoc))) == FALSE)
        return FALSE;

    // Viewer settings
    if (PtxPdf_Document_SetViewerSettings(pOutDoc, PtxPdfNav_ViewerSettings_Copy(pOutDoc, PtxPdf_Document_GetViewerSettings(pInDoc))) == FALSE)
        return FALSE;

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    pInFileRefList = PtxPdf_Document_GetAssociatedFiles(pInDoc);
    pOutFileRefList = PtxPdf_Document_GetAssociatedFiles(pOutDoc);
    if (pInFileRefList == NULL || pOutFileRefList == NULL)
        return FALSE;
    for (int iFileRef = 0; iFileRef < PtxPdf_FileReferenceList_GetCount(pInFileRefList); iFileRef++)
        if (PtxPdf_FileReferenceList_Add(pOutFileRefList, PtxPdf_FileReference_Copy(pOutDoc, PtxPdf_FileReferenceList_Get(pInFileRefList, iFileRef))) == FALSE)
            return FALSE;

    // Plain embedded files
    pInFileRefList = PtxPdf_Document_GetPlainEmbeddedFiles(pInDoc);
    pOutFileRefList = PtxPdf_Document_GetPlainEmbeddedFiles(pOutDoc);
    if (pInFileRefList == NULL || pOutFileRefList == NULL)
        return FALSE;
    for (int iFileRef = 0; iFileRef < PtxPdf_FileReferenceList_GetCount(pInFileRefList); iFileRef++)
        if (PtxPdf_FileReferenceList_Add(pOutFileRefList, PtxPdf_FileReference_Copy(pOutDoc, PtxPdf_FileReferenceList_Get(pInFileRefList, iFileRef))) == FALSE)
            return FALSE;

    return TRUE;
}

// Open input document
using (Stream stream = new FileStream(path, FileMode.Open, FileAccess.Read))
using (Document doc = Document.Open(stream, null))
{
    // Iterate over all pages
    int pageNumber = 1;
    foreach (Page page in doc.Pages)
    {
        // Print page size
        Console.WriteLine("Page {0}", pageNumber++);
        Size size = page.Size;
        Console.WriteLine("  Size:");
        Console.WriteLine("    Width: {0}", size.Width);
        Console.WriteLine("    Height: {0}", size.Height);

        // Compute rectangular bounding box of all content on page
        Rectangle contentBox = new Rectangle()
        {
            Left = double.MaxValue,
            Bottom = double.MaxValue,
            Right = double.MinValue,
            Top = double.MinValue,
        };
        ContentExtractor extractor = new ContentExtractor(page.Content);
        foreach (ContentElement element in extractor)
        {
            // Enlarge the content box for each content element
            AffineTransform tr = element.Transform;
            Rectangle box = element.BoundingBox;

            // The location on the page is given by the transformed points
            Enlarge(ref contentBox, tr.TransformPoint(new Point { X = box.Left, Y = box.Bottom, }));
            Enlarge(ref contentBox, tr.TransformPoint(new Point { X = box.Right, Y = box.Bottom, }));
            Enlarge(ref contentBox, tr.TransformPoint(new Point { X = box.Right, Y = box.Top, }));
            Enlarge(ref contentBox, tr.TransformPoint(new Point { X = box.Left, Y = box.Top, }));
        }
        Console.WriteLine("  Content bounding box:");
        Console.WriteLine("    Left: {0}", contentBox.Left);
        Console.WriteLine("    Bottom: {0}", contentBox.Bottom);
        Console.WriteLine("    Right: {0}", contentBox.Right);
        Console.WriteLine("    Top: {0}", contentBox.Top);
    }
}

static void Enlarge(ref Rectangle box, Point point)
{
    // Enlarge box if point lies outside of box
    if (point.X < box.Left)
        box.Left = point.X;
    else if (point.X > box.Right)
        box.Right = point.X;
    if (point.Y < box.Bottom)
        box.Bottom = point.Y;
    else if (point.Y > box.Top)
        box.Top = point.Y;
}

try (// Open input document
    FileStream stream = new FileStream(path, FileStream.Mode.READ_ONLY);
    Document doc = Document.open(stream, null)) {
    // Iterate over all pages
    int pageNumber = 1;
    for (Page page : doc.getPages()) {
        // Print page size
        System.out.format("Page %d\n", pageNumber++);
        Size size = page.getSize();
        System.out.println("  Size:");
        System.out.format("    Width: %f\n", size.getWidth());
        System.out.format("    Height: %f\n", size.getHeight());

        // Compute rectangular bounding box of all content on page
        Rectangle contentBox = new Rectangle(Double.MAX_VALUE, Double.MAX_VALUE, Double.MIN_VALUE, Double.MIN_VALUE);
        ContentExtractor extractor = new ContentExtractor(page.getContent());
        for (ContentElement element : extractor) {
            // Enlarge the content box for each content element
            AffineTransform tr = element.getTransform();
            Rectangle box = element.getBoundingBox();

            // The location on the page is given by the transformed points
            contentBox = Enlarge(contentBox, tr.transformPoint(new Point(box.getLeft(), box.getBottom())));
            contentBox = Enlarge(contentBox, tr.transformPoint(new Point(box.getRight(), box.getBottom())));
            contentBox = Enlarge(contentBox, tr.transformPoint(new Point(box.getRight(), box.getTop())));
            contentBox = Enlarge(contentBox, tr.transformPoint(new Point(box.getLeft(), box.getTop())));
        }
        System.out.println("  Content bounding box:");
        System.out.format("    Left: %f\n", contentBox.getLeft());
        System.out.format("    Bottom: %f\n", contentBox.getBottom());
        System.out.format("    Right: %f\n", contentBox.getRight());
        System.out.format("    Top: %f\n", contentBox.getTop());
    }
}

static Rectangle Enlarge(Rectangle box, Point point) {
    // Enlarge box if point lies outside of box
    if (point.getX() < box.getLeft())
        box.setLeft(point.getX());
    else if (point.getX() > box.getRight())
        box.setRight(point.getX());
    if (point.getY() < box.getBottom())
        box.setBottom(point.getY());
    else if (point.getY() > box.getTop())
        box.setTop(point.getY());
    return box;
}

// Open input document
using (Stream inStream = new FileStream(inPath, FileMode.Open, FileAccess.Read))
using (Document inDoc = Document.Open(inStream, null))
{
    // Conformance
    Console.WriteLine("Conformance: {0}", inDoc.Conformance.ToString());

    // Encryption information
    Permission? permissions = inDoc.Permissions;
    if (!permissions.HasValue)
    {
        Console.WriteLine("Not encrypted");
    }
    else
    {
        Console.WriteLine("Encryption:");
        Console.Write("  - Permissions: ");
        foreach (Enum flag in Enum.GetValues(typeof(Permission)))
            if (permissions.Value.HasFlag(flag))
                Console.Write("{0}, ", flag.ToString());
        Console.WriteLine();
    }

    // Get metadata
    Metadata metadata = inDoc.Metadata;
    Console.WriteLine("Document information:");

    // Get title
    string title = metadata.Title;
    if (title != null)
        Console.WriteLine("  - Title: {0}", title);

    // Get author
    string author = metadata.Author;
    if (author != null)
        Console.WriteLine("  - Author: {0}", author);

    // Get subject
    string subject = metadata.Subject;
    if (subject != null)
        Console.WriteLine("  - Subject: {0}", subject);

    // Get keywords
    string keywords = metadata.Keywords;
    if (keywords != null)
        Console.WriteLine("  - Keywords: {0}", keywords);

    // Get creation date
    DateTimeOffset? creationDate = metadata.CreationDate;
    if (creationDate != null)
        Console.WriteLine("  - Creation Date: {0}", creationDate);

    // Get modification date
    DateTimeOffset? modificationDate = metadata.ModificationDate;
    if (modificationDate != null)
        Console.WriteLine("  - Modification Date: {0}", modificationDate);

    // Get creator
    string creator = metadata.Creator;
    if (creator != null)
        Console.WriteLine("  - Creator: {0}", creator);

    // Get producer
    string producer = metadata.Producer;
    if (producer != null)
        Console.WriteLine("  - Producer: {0}", producer);

    // Custom entries
    Console.WriteLine("Custom entries:");
    foreach (var entry in metadata.CustomEntries)
        Console.WriteLine("  - {0}: {1}", entry.Key, entry.Value);
}

try (// Open input document
    FileStream inStream = new FileStream(inPath, FileStream.Mode.READ_ONLY);
    Document inDoc = Document.open(inStream, null)) {
    // Conformance
    System.out.format("Conformance: %s\n", inDoc.getConformance().toString());

    // Encryption information
    EnumSet permissions = inDoc.getPermissions();
    if (permissions == null) {
        System.out.println("Not encrypted");
    } else {
        System.out.println("Encryption:");
        System.out.print("  - Permissions: ");
        for (Permission permission : permissions) {
            System.out.format("%s, ", permission.toString());
        }
        System.out.println();
    }

    // Get metadata of input PDF
    Metadata metadata = inDoc.getMetadata();
    System.out.format("Document information:\n");

    // Get title
    String title = metadata.getTitle();
    if (title != null)
        System.out.format("  - Title: %s\n", title);

    // Get author
    String author = metadata.getAuthor();
    if (author != null)
        System.out.format("  - Author: %s\n", author);

    // Get subject
    String subject = metadata.getSubject();
    if (subject != null)
        System.out.format("  - Subject: %s\n", subject);

    // Get keywords
    String keywords = metadata.getKeywords();
    if (keywords != null)
        System.out.format("  - Keywords: %s\n", keywords);

    // Get creation date
    OffsetDateTime creationDate = metadata.getCreationDate();
    if (creationDate != null)
        System.out.format("  - Creation Date: %s\n", creationDate.toString());

    // Get modification date
    OffsetDateTime modificationDate = metadata.getModificationDate();
    if (modificationDate != null)
        System.out.format("  - Modification Date: %s\n", modificationDate.toString());

    // Get creator
    String creator = metadata.getCreator();
    if (creator != null)
        System.out.format("  - Creator: %s\n", creator);

    // Get producer
    String producer = metadata.getProducer();
    if (producer != null)
        System.out.format("  - Producer: %s\n", producer);

    // Custom entries
    System.out.format("Custom entries:\n");
    for (Map.Entry entry : metadata.getCustomEntries().entrySet())
        System.out.format("  - %s: %s\n", entry.getKey(), entry.getValue());
}

// Open input document
pInStream = _tfopen(szInPath, _T("rb"));
GOTO_CLEANUP_IF_NULL(pInStream, _T("Failed to open input file \"%s\".\n"), szInPath);
PtxSysCreateFILEStreamDescriptor(&descriptor, pInStream, 0);
pInDoc = PtxPdf_Document_Open(&descriptor, _T(""));
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInDoc, _T("Input file \"%s\" cannot be opened. %s (ErrorCode: 0x%08x).\n"), szInPath, szErrorBuff, Ptx_GetLastError());

// Conformance
TPtxPdf_Conformance conformance = PtxPdf_Document_GetConformance(pInDoc);
if (conformance == 0)
{
    GOTO_CLEANUP(szErrorBuff, Ptx_GetLastError());
}
_tprintf(_T("Conformance: "));
switch (conformance)
{
case ePtxPdf_Conformance_Pdf10: _tprintf(_T("PDF 1.0\n")); break;
case ePtxPdf_Conformance_Pdf11: _tprintf(_T("PDF 1.1\n")); break;
case ePtxPdf_Conformance_Pdf12: _tprintf(_T("PDF 1.2\n")); break;
case ePtxPdf_Conformance_Pdf13: _tprintf(_T("PDF 1.3\n")); break;
case ePtxPdf_Conformance_Pdf14: _tprintf(_T("PDF 1.4\n")); break;
case ePtxPdf_Conformance_Pdf15: _tprintf(_T("PDF 1.5\n")); break;
case ePtxPdf_Conformance_Pdf16: _tprintf(_T("PDF 1.6\n")); break;
case ePtxPdf_Conformance_Pdf17: _tprintf(_T("PDF 1.7\n")); break;
case ePtxPdf_Conformance_Pdf20: _tprintf(_T("PDF 2.0\n")); break;
case ePtxPdf_Conformance_PdfA1B: _tprintf(_T("PDF/A1-b\n")); break;
case ePtxPdf_Conformance_PdfA1A: _tprintf(_T("PDF/A1-a\n")); break;
case ePtxPdf_Conformance_PdfA2B: _tprintf(_T("PDF/A2-b\n")); break;
case ePtxPdf_Conformance_PdfA2U: _tprintf(_T("PDF/A2-u\n")); break;
case ePtxPdf_Conformance_PdfA2A: _tprintf(_T("PDF/A2-a\n")); break;
case ePtxPdf_Conformance_PdfA3B: _tprintf(_T("PDF/A3-b\n")); break;
case ePtxPdf_Conformance_PdfA3U: _tprintf(_T("PDF/A3-u\n")); break;
case ePtxPdf_Conformance_PdfA3A: _tprintf(_T("PDF/A3-a\n")); break;
}

// Encryption information
TPtxPdf_Permission permissions;
BOOL iRet = PtxPdf_Document_GetPermissions(pInDoc, &permissions);
if (iRet == FALSE)
{
    if (Ptx_GetLastError() != ePtx_Error_Success)
        GOTO_CLEANUP(szErrorBuff, Ptx_GetLastError());
    _tprintf(_T("Not encrypted\n"));
}
else
{
    _tprintf(_T("Encryption:\n"));
    _tprintf(_T("  - Permissions: "));
    if (permissions & ePtxPdf_Permission_Print) _tprintf(_T("Print, "));
    if (permissions & ePtxPdf_Permission_Modify) _tprintf(_T("Modify, "));
    if (permissions & ePtxPdf_Permission_Copy) _tprintf(_T("Copy, "));
    if (permissions & ePtxPdf_Permission_Annotate) _tprintf(_T("Annotate, "));
    if (permissions & ePtxPdf_Permission_FillForms) _tprintf(_T("FillForms, "));
    if (permissions & ePtxPdf_Permission_SupportDisabilities) _tprintf(_T("SupportDisabilities, "));
    if (permissions & ePtxPdf_Permission_Assemble) _tprintf(_T("Assemble, "));
    if (permissions & ePtxPdf_Permission_DigitalPrint) _tprintf(_T("DigitalPrint, "));
    _tprintf(_T("\n"));
}

// Get metadata of input PDF
pMetadata = PtxPdf_Document_GetMetadata(pInDoc);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pMetadata, _T("Failed to get metadata. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
_tprintf(_T("Document information:\n"));

// Get title
size_t nTitle = PtxPdf_Metadata_GetTitle(pMetadata, NULL, 0);
if (nTitle != 0)
{
    TCHAR* szTitle = (TCHAR*)malloc(nTitle * sizeof(TCHAR));
    if (szTitle != NULL)
    {
        PtxPdf_Metadata_GetTitle(pMetadata, szTitle, nTitle);
        _tprintf(_T("  - Title: %s\n"), szTitle);
        free(szTitle);
    }
}

// Get author
size_t nAuthor = PtxPdf_Metadata_GetAuthor(pMetadata, NULL, 0);
if (nAuthor != 0)
{
    TCHAR* szAuthor = (TCHAR*)malloc(nAuthor * sizeof(TCHAR));
    if (szAuthor != NULL)
    {
        PtxPdf_Metadata_GetAuthor(pMetadata, szAuthor, nAuthor);
        _tprintf(_T("  - Author: %s\n"), szAuthor);
        free(szAuthor);
    }
}

// Get creator
size_t nCreator = PtxPdf_Metadata_GetCreator(pMetadata, NULL, 0);
if (nCreator != 0)
{
    TCHAR* szCreator = (TCHAR*)malloc(nCreator * sizeof(TCHAR));
    if (szCreator != NULL)
    {
        PtxPdf_Metadata_GetCreator(pMetadata, szCreator, nCreator);
        _tprintf(_T("  - Creator: %s\n"), szCreator);
        free(szCreator);
    }
}

// Get producer
size_t nProducer = PtxPdf_Metadata_GetProducer(pMetadata, NULL, 0);
if (nProducer != 0)
{
    TCHAR* szProducer = (TCHAR*)malloc(nProducer * sizeof(TCHAR));
    if (szProducer != NULL)
    {
        PtxPdf_Metadata_GetProducer(pMetadata, szProducer, nProducer);
        _tprintf(_T("  - Producer: %s\n"), szProducer);
        free(szProducer);
    }
}

// Get subject
size_t nSubject = PtxPdf_Metadata_GetSubject(pMetadata, NULL, 0);
if (nSubject != 0)
{
    TCHAR* szSubject = (TCHAR*)malloc(nSubject * sizeof(TCHAR));
    if (szSubject != NULL)
    {
        PtxPdf_Metadata_GetSubject(pMetadata, szSubject, nSubject);
        _tprintf(_T("  - Subject: %s\n"), szSubject);
        free(szSubject);
    }
}

// Get keywords
size_t nKeywords = PtxPdf_Metadata_GetKeywords(pMetadata, NULL, 0);
if (nKeywords != 0)
{
    TCHAR* szKeywords = (TCHAR*)malloc(nKeywords * sizeof(TCHAR));
    if (szKeywords != NULL)
    {
        PtxPdf_Metadata_GetKeywords(pMetadata, szKeywords, nKeywords);
        _tprintf(_T("  - Keywords: %s\n"), szKeywords);
        free(szKeywords);
    }
}

// Get creation date
if (PtxPdf_Metadata_GetCreationDate(pMetadata, &date) == TRUE)
{
    _tprintf(_T("  - Creation Date: %02d-%02d-%d %02d:%02d:%02d%c%02d:%02d\n"), date.iYear, date.iMonth, date.iDay,
                                                                                date.iHour, date.iMinute, date.iSecond,
                                                                                date.iTZSign >= 0 ? '+' : '-', date.iTZHour, date.iTZMinute);
}

// Get modification date
if (PtxPdf_Metadata_GetModificationDate(pMetadata, &date) == TRUE)
{
    _tprintf(_T("  - Modification Date: %02d-%02d-%d %02d:%02d:%02d%c%02d:%02d\n"), date.iYear, date.iMonth, date.iDay,
                                                                                    date.iHour, date.iMinute, date.iSecond,
                                                                                    date.iTZSign >= 0 ? '+' : '-', date.iTZHour, date.iTZMinute);
}

// Get custom entries
_tprintf(_T("Custom entries:\n"));
TPtx_StringMap* pCustomEntries = PtxPdf_Metadata_GetCustomEntries(pMetadata);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pCustomEntries, _T("Failed to get custom entries. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
for (int i = Ptx_StringMap_GetBegin(pCustomEntries), iEnd = Ptx_StringMap_GetEnd(pCustomEntries); i != iEnd; i = Ptx_StringMap_GetNext(pCustomEntries, i))
{
    size_t nKeySize = Ptx_StringMap_GetKey(pCustomEntries, i, NULL, 0);
    TCHAR* szKey = (TCHAR*)malloc(nKeySize * sizeof(TCHAR));
    nKeySize = Ptx_StringMap_GetKey(pCustomEntries, i, szKey, nKeySize);

    size_t nValueSize = Ptx_StringMap_GetValue(pCustomEntries, i, NULL, 0);
    TCHAR* szValue = (TCHAR*)malloc(nValueSize * sizeof(TCHAR));
    nValueSize = Ptx_StringMap_GetValue(pCustomEntries, i, szValue, nValueSize);

    if (szKey && nKeySize && szValue && nValueSize)
        _tprintf(_T("  - %s: %s\n"), szKey, szValue);

    free (szKey);
    free (szValue);
}

// Open input document
using (Stream inStream = new FileStream(inPath, FileMode.Open, FileAccess.Read))
using (Document inDoc = Document.Open(inStream, null))
{
    SignatureFieldList signatureFields = inDoc.SignatureFields;
    Console.WriteLine("Number of signature fields: {0}", signatureFields.Count);
    foreach (SignatureField field in signatureFields)
    {
        if (field is Signature sig)
        {
            // List name
            string name = sig.Name;
            Console.WriteLine("- {0} fields, signed by: {1}",
                sig.IsVisible ? "Visible" : "Invisible", name ?? "(Unknown name)");

            // List location
            string location = sig.Location;
            if (location != null)
                Console.WriteLine("  - Location: {0}", location);

            // List reason 
            string reason = sig.Reason;
            if (reason != null)
                Console.WriteLine("  - Reason: {0}", reason);

            // List contact info
            string contactInfo = sig.ContactInfo;
            if (contactInfo != null)
                Console.WriteLine("  - Contact info: {0}", contactInfo);

            // List date
            DateTimeOffset? date = sig.Date;
            if (date != null)
                Console.WriteLine("  - Date: {0}", date.Value);
        }
        else
            Console.WriteLine("- {0} field, not signed", field.IsVisible ? "Visible" : "Invisible");
    }
}

try (// Open input document
    FileStream inStream = new FileStream(inPath, FileStream.Mode.READ_ONLY);
    Document inDoc = Document.open(inStream, null)) {
    SignatureFieldList signatureFields = inDoc.getSignatureFields();
    System.out.format("Number of signature fields: %d\n", signatureFields.size());

    for (SignatureField field : signatureFields) {
        if (field instanceof Signature) {
            Signature sig = (Signature)field;
            // List name
            String name = sig.getName();
            System.out.format("- %s field, signed by: %s\n", sig.getIsVisible() ? "Visible" : "Invisible",
                    name != null ? name : "(Unknown name)");

            // List location
            String location = sig.getLocation();
            if (location != null)
                System.out.format("  - Location: %s\n", location);

            // List reason
            String reason = sig.getReason();
            if (reason != null)
                System.out.format("  - Reason: %s\n", reason);

            // List contact info
            String contactInfo = sig.getContactInfo();
            if (contactInfo != null)
                System.out.format("  - Contact info: %s\n", contactInfo);

            // List date
            OffsetDateTime date = sig.getDate();
            if (date != null)
                System.out.format("  - Date: %s\n", date.toString());
        } else {
            System.out.format("- %s field, not signed\n", field.getIsVisible() ? "Visible" : "Invisible");
        }
    }
}

// Open input document
pInStream = _tfopen(szInPath, _T("rb"));
GOTO_CLEANUP_IF_NULL(pInStream, _T("Failed to open input file \"%s\".\n"), szInPath);
PtxSysCreateFILEStreamDescriptor(&descriptor, pInStream, 0);
pInDoc = PtxPdf_Document_Open(&descriptor, _T(""));
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pInDoc, _T("Input file \"%s\" cannot be opened. %s (ErrorCode: 0x%08x).\n"), szInPath, szErrorBuff, Ptx_GetLastError());

// Get signatures of input PDF
pSignatureFields = PtxPdf_Document_GetSignatureFields(pInDoc);
GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pSignatureFields, _T("Failed to get signatures of input PDF. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());
_tprintf(_T("Number of signature fields: %d\n"), PtxPdfForms_SignatureFieldList_GetCount(pSignatureFields));

for (int i = 0; i < PtxPdfForms_SignatureFieldList_GetCount(pSignatureFields); i++)
{
    pSig = PtxPdfForms_SignatureFieldList_Get(pSignatureFields, i);
    GOTO_CLEANUP_IF_NULL_PRINT_ERROR(pSig, _T("Failed to get signature. %s (ErrorCode: 0x%08x).\n"), szErrorBuff, Ptx_GetLastError());

    TPtxPdfForms_SignatureFieldType iFieldType = PtxPdfForms_SignatureField_GetType(pSig);
    if (iFieldType == ePtxPdfForms_SignatureFieldType_Signature
        || iFieldType == ePtxPdfForms_SignatureFieldType_DocMdpSignature
        || iFieldType == ePtxPdfForms_SignatureFieldType_DocumentSignature
        || iFieldType == ePtxPdfForms_SignatureFieldType_DocUrSignature)
    {
        // List name
        size_t nName = PtxPdfForms_SignedSignatureField_GetName(pSig, NULL, 0);
        _tprintf(_T("- %s fields"), PtxPdfForms_SignatureField_IsVisible(pSig) ? _T("Visible") : _T("Invisible"));
        if (nName != 0)
        {
            TCHAR* szName = (TCHAR*)malloc(nName * sizeof(TCHAR));
            if (szName != NULL)
            {
                PtxPdfForms_SignedSignatureField_GetName(pSig, szName, nName);
                _tprintf(_T(", signed by: %s"), szName);
                free(szName);
            }
        }
        _tprintf(_T("\n"));

        // List location
        size_t nLocation = PtxPdfForms_Signature_GetLocation(pSig, NULL, 0);
        if (nLocation != 0)
        {
            TCHAR* szLocation = (TCHAR*)malloc(nLocation * sizeof(TCHAR));
            if (szLocation != NULL)
            {
                PtxPdfForms_Signature_GetLocation(pSig, szLocation, nLocation);
                _tprintf(_T("  - Location: %s\n"), szLocation);
                free(szLocation);
            }
        }

        // List reason
        size_t nReason = PtxPdfForms_Signature_GetReason(pSig, NULL, 0);
        if (nReason != 0)
        {
            TCHAR* szReason = (TCHAR*)malloc(nReason * sizeof(TCHAR));
            if (szReason != NULL)
            {
                PtxPdfForms_Signature_GetReason(pSig, szReason, nReason);
                _tprintf(_T("  - Reason: %s\n"), szReason);
                free(szReason);
            }
        }

        // List contact info
        size_t nContactInfo = PtxPdfForms_Signature_GetContactInfo(pSig, NULL, 0);
        if (nContactInfo != 0)
        {
            TCHAR* szContactInfo = (TCHAR*)malloc(nContactInfo * sizeof(TCHAR));
            if (szContactInfo != NULL)
            {
                PtxPdfForms_Signature_GetContactInfo(pSig, szContactInfo, nContactInfo);
                _tprintf(_T("  - Contact info: %s\n"), szContactInfo);
                free(szContactInfo);
            }
        }

        // List date
        if (PtxPdfForms_SignedSignatureField_GetDate(pSig, &date) == TRUE)
        {
            _tprintf(_T("  - Date: %02d-%02d-%d %02d:%02d:%02d%c%02d:%02d\n"), date.iYear, date.iMonth, date.iDay,
                                                                               date.iHour, date.iMinute, date.iSecond,
                                                                               date.iTZSign >= 0 ? '+' : '-', date.iTZHour, date.iTZMinute);
        }
    }
    else
    {
        _tprintf(_T("- %s field, not signed\n"), PtxPdfForms_SignatureField_IsVisible(pSig) ? _T("Visible") : _T("Invisible"));
    }
}

// Open input document
using (Stream inStream = new FileStream(inPath, FileMode.Open, FileAccess.Read))
using (Document inDoc = Document.Open(inStream, null))
{
    PrintOutlineItems(inDoc.Outline, "", inDoc);
}

static void PrintOutlineItem(OutlineItem item, string indentation, Document document)
{
    string title = item.Title;
    Console.Out.Write("{0}{1}", indentation, title);
    Destination dest = item.Destination;
    if (dest != null)
    {
        int pageNumber = document.Pages.IndexOf(dest.Target.Page) + 1;
        string dots = new string('.', 78 - indentation.Length - title.Length - pageNumber.ToString().Length);
        Console.Out.Write(" {0} {1}", dots, pageNumber);
    }
    Console.Out.WriteLine();
    PrintOutlineItems(item.Children, indentation + "  ", document);
}

static void PrintOutlineItems(OutlineItemList outlineItems, string indentation, Document document)
{
    foreach (var item in outlineItems)
        PrintOutlineItem(item, indentation, document);
}

try (// Open input document
    FileStream inStream = new FileStream(inPath, FileStream.Mode.READ_ONLY);
    Document inDoc = Document.open(inStream, null)) {
    printOutlineItems(inDoc.getOutline(), "", inDoc);
}

static void printOutlineItem(OutlineItem item, String indentation, Document document) throws PdfToolboxException {
    String title = item.getTitle();
    System.out.format("%s%s", indentation, title);
    Destination dest = item.getDestination();
    if (dest != null) {
        int pageNumber = document.getPages().indexOf(dest.getTarget().getPage()) + 1;
        char[] dots = new char[78 - indentation.length() - title.length() - Integer.toString(pageNumber).length()];
        Arrays.fill(dots, '.');
        System.out.format(" %s %d", new String(dots), pageNumber);
    }
    System.out.println();
    printOutlineItems(item.getChildren(), indentation + "  ", document);
}

static void printOutlineItems(OutlineItemList outlineItems, String indentation, Document document)
        throws PdfToolboxException {
    for (OutlineItem item : outlineItems)
        printOutlineItem(item, indentation, document);
}

// Open input document
using (Stream inStream = new FileStream(inPath, FileMode.Open, FileAccess.Read))
using (Document inDoc = Document.Open(inStream, null))
{
    int pageNumber = 1;

    // Process each page
    foreach (var inPage in inDoc.Pages)
    {
        Console.WriteLine("==========");
        Console.WriteLine($"Page: {pageNumber++}");
        Console.WriteLine("==========");

        ContentExtractor extractor = new ContentExtractor(inPage.Content);
        extractor.Ungrouping = UngroupingSelection.All;

        // Iterate over all content elements and only process text elements
        foreach (ContentElement element in extractor)
            if (element is TextElement textElement)
                WriteText(textElement.Text);
    }
}

private static void WriteText(Text text)
{
    string textPart = "";

    // Write all text fragments
    // Determine heuristically if there is a space between two text fragments
    for (int iFragment = 0; iFragment < text.Count; iFragment++)
    {

        TextFragment currFragment = text[iFragment];
        if (iFragment == 0)
            textPart += currFragment.Text;
        else
        {
            TextFragment lastFragment = text[iFragment - 1];
            if (currFragment.CharacterSpacing != lastFragment.CharacterSpacing ||
                currFragment.FontSize != lastFragment.FontSize ||
                currFragment.HorizontalScaling != lastFragment.HorizontalScaling ||
                currFragment.Rise != lastFragment.Rise ||
                currFragment.WordSpacing != lastFragment.WordSpacing)
                textPart += $" {currFragment.Text}";
            else
            {
                Point currentBotLeft = currFragment.Transform.TransformRectangle(currFragment.BoundingBox).BottomLeft;
                Point beforeBotRight = lastFragment.Transform.TransformRectangle(lastFragment.BoundingBox).BottomRight;

                if (beforeBotRight.X < currentBotLeft.X - 0.7 * currFragment.FontSize ||
                    beforeBotRight.Y < currentBotLeft.Y - 0.1 * currFragment.FontSize ||
                    currentBotLeft.Y < beforeBotRight.Y - 0.1 * currFragment.FontSize)
                    textPart += $" {currFragment.Text}";
                else
                    textPart += currFragment.Text;
            }
        }
    }
    Console.WriteLine(textPart);
}

try (// Open input document
    FileStream inStream = new FileStream(inPath, FileStream.Mode.READ_ONLY);
    Document inDoc = Document.open(inStream, null)) {
    int pageNumber = 1;

    // Process each page
    for (Page inPage : inDoc.getPages()) {
        System.out.println("==========");
        System.out.println("Page: " + pageNumber++);
        System.out.println("==========");

        ContentExtractor extractor = new ContentExtractor(inPage.getContent());
        extractor.setUngrouping(UngroupingSelection.ALL);

        // Iterate over all content elements and only process text elements
        for (ContentElement element : extractor) {
            if (element instanceof TextElement)
                writeText(((TextElement) element).getText());
        }
    }
}

private static void writeText(Text text) {
    String textPart = "";

    // Write all text fragments
    // Determine heuristically if there is a space between two text fragments
    for (int iFragment = 0; iFragment < text.size(); iFragment++) {
        TextFragment currFragment = text.get(iFragment);
        if (iFragment == 0)
            textPart += currFragment.getText();
        else {
            TextFragment lastFragment = text.get(iFragment - 1);
            if (currFragment.getCharacterSpacing() != lastFragment.getCharacterSpacing() ||
                currFragment.getFontSize() != lastFragment.getFontSize() ||
                currFragment.getHorizontalScaling() != lastFragment.getHorizontalScaling() ||
                currFragment.getRise() != lastFragment.getRise() ||
                currFragment.getWordSpacing() != lastFragment.getWordSpacing()) {
                textPart += " ";
                textPart += currFragment.getText();
            }
            else {
                Point currentBotLeft = currFragment.getTransform().transformRectangle(currFragment.getBoundingBox()).getBottomLeft();
                Point beforeBotRight = lastFragment.getTransform().transformRectangle(lastFragment.getBoundingBox()).getBottomRight();

                if (beforeBotRight.getX() < currentBotLeft.getX() - 0.7 * currFragment.getFontSize() ||
                    beforeBotRight.getY() < currentBotLeft.getY() - 0.1 * currFragment.getFontSize() ||
                    currentBotLeft.getY() < beforeBotRight.getY() - 0.1 * currFragment.getFontSize()) {
                    textPart += " ";
                    textPart += currFragment.getText();
                }
                else
                    textPart += currFragment.getText();
            }
        }
    }
    System.out.println(textPart);
}

// Open input document
using (Stream inStream = new FileStream(inPath, FileMode.Open, FileAccess.Read))
using (Document inDoc = Document.Open(inStream, null))

// Create output document
using (Stream outStream = new FileStream(outPath, FileMode.Create, FileAccess.ReadWrite))
using (Document outDoc = Document.Create(outStream, inDoc.Conformance, null))
{
    // Copy document-wide data
    CopyDocumentData(inDoc, outDoc);

    // Process each page
    foreach (var inPage in inDoc.Pages)
    {
        // Create empty output page
        Page outPage = Page.Create(outDoc, inPage.Size);
        // Copy page content from input to output
        CopyContent(inPage.Content, outPage.Content, outDoc);
        // Add the new page to the output document's page list
        outDoc.Pages.Add(outPage);
    }
}

private static void CopyDocumentData(Document inDoc, Document outDoc)
{
    // Copy document-wide data

    // Output intent
    if (inDoc.OutputIntent != null)
        outDoc.OutputIntent = IccBasedColorSpace.Copy(outDoc, inDoc.OutputIntent);

    // Metadata
    outDoc.Metadata = Metadata.Copy(outDoc, inDoc.Metadata);

    // Viewer settings
    outDoc.ViewerSettings = ViewerSettings.Copy(outDoc, inDoc.ViewerSettings);

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.AssociatedFiles;
    foreach (FileReference inFileRef in inDoc.AssociatedFiles)
        outAssociatedFiles.Add(FileReference.Copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.PlainEmbeddedFiles;
    foreach (FileReference inFileRef in inDoc.PlainEmbeddedFiles)
        outEmbeddedFiles.Add(FileReference.Copy(outDoc, inFileRef));
}

private static void CopyContent(Content inContent, Content outContent, Document outDoc)
{
    // Use a content extractor and a content generator to copy content
    ContentExtractor extractor = new ContentExtractor(inContent);
    using ContentGenerator generator = new ContentGenerator(outContent, false);

    // Iterate over all content elements
    foreach (ContentElement inElement in extractor)
    {
        ContentElement outElement;
        // Special treatment for group elements
        if (inElement is GroupElement inGroupElement)
        {
            // Create empty output group element
            GroupElement outGroupElement = GroupElement.CopyWithoutContent(outDoc, inGroupElement);
            outElement = outGroupElement;
            // Call CopyContent() recursively for the group element's content
            CopyContent(inGroupElement.Group.Content, outGroupElement.Group.Content, outDoc);
        }
        else
        {
            // Copy the content element to the output document
            outElement = ContentElement.Copy(outDoc, inElement);
            if (outElement is TextElement outTextElement)
            {
                // Special treatment for text element
                Text text = outTextElement.Text;
                // Remove all those text fragments whose fill and stroke paint is white
                for (int iFragment = text.Count - 1; iFragment >= 0; iFragment--)
                {
                    TextFragment fragment = text[iFragment];
                    if ((fragment.Fill == null || IsWhite(fragment.Fill.Paint)) &&
                        (fragment.Stroke == null || IsWhite(fragment.Stroke.Paint)))
                        text.RemoveAt(iFragment);
                }
                // Prevent appending an empty text element
                if (text.Count == 0)
                    outElement = null;
            }
        }
        // Append the finished output element to the content generator
        if (outElement != null)
            generator.AppendContentElement(outElement);
    }
}

private static bool IsWhite(Paint paint)
{
    ColorSpace colorSpace = paint.ColorSpace;
    if (colorSpace is DeviceGrayColorSpace || colorSpace is CalibratedGrayColorSpace ||
        colorSpace is DeviceRgbColorSpace || colorSpace is CalibratedRgbColorSpace)
    {
        // These color spaces are additive: white is 1.0
        return paint.Color.Min() == 1.0;
    }
    if (colorSpace is DeviceCmykColorSpace)
    {
        // This color space is subtractive: white is 0.0
        return paint.Color.Max() == 0.0;
    }
    return false;
}

try (// Open input document
    FileStream inStream = new FileStream(inPath, FileStream.Mode.READ_ONLY);
    Document inDoc = Document.open(inStream, null);
    FileStream outStream = new FileStream(outPath, FileStream.Mode.READ_WRITE_NEW)) {
    try (// Create output document
        Document outDoc = Document.create(outStream, inDoc.getConformance(), null)) {

        // Copy document-wide data
        copyDocumentData(inDoc, outDoc);

        // Process each page
        for (Page inPage : inDoc.getPages()) {
            // Create empty output page
            Page outPage = Page.create(outDoc, inPage.getSize());
            // Copy page content from input to output
            CopyContent(inPage.getContent(), outPage.getContent(), outDoc);
            // Add page to output document
            outDoc.getPages().add(outPage);
        }
    }
}

private static void copyDocumentData(Document inDoc, Document outDoc) throws PdfToolboxException, IOException {
    // Copy document-wide data

    // Output intent
    if (inDoc.getOutputIntent() != null)
        outDoc.setOutputIntent(IccBasedColorSpace.copy(outDoc, inDoc.getOutputIntent()));

    // Metadata
    outDoc.setMetadata(Metadata.copy(outDoc, inDoc.getMetadata()));

    // Viewer settings
    outDoc.setViewerSettings(ViewerSettings.copy(outDoc, inDoc.getViewerSettings()));

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.getAssociatedFiles();
    for (FileReference inFileRef : inDoc.getAssociatedFiles())
        outAssociatedFiles.add(FileReference.copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.getPlainEmbeddedFiles();
    for (FileReference inFileRef : inDoc.getPlainEmbeddedFiles())
        outEmbeddedFiles.add(FileReference.copy(outDoc, inFileRef));
}

private static void CopyContent(Content inContent, Content outContent, Document outDoc) throws PdfToolboxException, IOException {
    // Use a content extractor and a content generator to copy content
    ContentExtractor extractor = new ContentExtractor(inContent);
    try (ContentGenerator generator = new ContentGenerator(outContent, false)) {
        // Iterate over all content elements
        for (ContentElement inElement : extractor) {
            ContentElement outElement = null;
            // Special treatment for group elements
            if (inElement instanceof GroupElement) {
                GroupElement inGroupElement = (GroupElement)inElement;
                // Create empty output group element
                GroupElement outGroupElement = GroupElement.copyWithoutContent(outDoc, inGroupElement);
                outElement = outGroupElement;
                // Call CopyContent() recursively for the group element's content
                CopyContent(inGroupElement.getGroup().getContent(), outGroupElement.getGroup().getContent(), outDoc);
            } else {
                // Copy the content element to the output document
                outElement = ContentElement.copy(outDoc, inElement);
                if (outElement instanceof TextElement) {
                    // Special treatment for text element
                    TextElement outTextElement = (TextElement)outElement;
                    Text text = outTextElement.getText();
                    // Remove all those text fragments whose fill and stroke paint is white
                    for (int iFragment = text.size() - 1; iFragment >= 0; iFragment--) {
                        TextFragment fragment = text.get(iFragment);
                        if ((fragment.getFill() == null || IsWhite(fragment.getFill().getPaint())) &&
                            (fragment.getStroke() == null || IsWhite(fragment.getStroke().getPaint())))
                            text.remove(iFragment);
                    }
                    // Prevent appending an empty text element
                    if (text.size() == 0)
                        outElement = null;
                }
            }
            // Append the finished output element to the content generator
            if (outElement != null)
                generator.appendContentElement(outElement);
        }
    }
}

private static boolean IsWhite(Paint paint) {
    double[] color = paint.getColor();
    ColorSpace colorSpace = paint.getColorSpace();
    if (colorSpace instanceof DeviceGrayColorSpace || colorSpace instanceof CalibratedGrayColorSpace ||
            colorSpace instanceof DeviceRgbColorSpace || colorSpace instanceof CalibratedRgbColorSpace) {
        // These color spaces are additive: white is 1.0
        for (double value : color)
            if (value != 1.0)
                return false;
        return true;
    }
    if (colorSpace instanceof DeviceCmykColorSpace) {
        // This color space is subtractive: white is 0.0
        for (double value : color)
            if (value != 0.0)
                return false;
        return true;
    }
    return false;
}

// Open input document
using (Stream inStream = new FileStream(inPath, FileMode.Open, FileAccess.Read))
using (Document inDoc = Document.Open(inStream, null))

// Create output document
using (Stream outStream = new FileStream(outPath, FileMode.Create, FileAccess.ReadWrite))
using (Document outDoc = Document.Create(outStream, inDoc.Conformance, null))
{
    // Copy document-wide data
    CopyDocumentData(inDoc, outDoc);

    // Process each page
    foreach (var inPage in inDoc.Pages)
    {
        // Create empty output page
        Page outPage = Page.Create(outDoc, inPage.Size);
        // Copy page content from input to output and search for string
        CopyContent(inPage.Content, outPage.Content, outDoc, searchString);
        // If the text was found and deleted, add the replacement text
        if (fragment != null)
            AddText(outDoc, outPage, replString);
        // Add the new page to the output document's page list
        outDoc.Pages.Add(outPage);
    }
}

private static void CopyDocumentData(Document inDoc, Document outDoc)
{
    // Copy document-wide data

    // Output intent
    if (inDoc.OutputIntent != null)
        outDoc.OutputIntent = IccBasedColorSpace.Copy(outDoc, inDoc.OutputIntent);

    // Metadata
    outDoc.Metadata = Metadata.Copy(outDoc, inDoc.Metadata);

    // Viewer settings
    outDoc.ViewerSettings = ViewerSettings.Copy(outDoc, inDoc.ViewerSettings);

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.AssociatedFiles;
    foreach (FileReference inFileRef in inDoc.AssociatedFiles)
        outAssociatedFiles.Add(FileReference.Copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.PlainEmbeddedFiles;
    foreach (FileReference inFileRef in inDoc.PlainEmbeddedFiles)
        outEmbeddedFiles.Add(FileReference.Copy(outDoc, inFileRef));
}

private static void CopyContent(Content inContent, Content outContent, Document outDoc, string searchString)
{
    // Use a content extractor and a content generator to copy content
    ContentExtractor extractor = new ContentExtractor(inContent);
    using ContentGenerator generator = new ContentGenerator(outContent, false);

    // Iterate over all content elements
    foreach (ContentElement inElement in extractor)
    {
        ContentElement outElement;
        // Special treatment for group elements
        if (inElement is GroupElement inGroupElement)
        {
            // Create empty output group element
            GroupElement outGroupElement = GroupElement.CopyWithoutContent(outDoc, inGroupElement);
            outElement = outGroupElement;
            // Save transform for later restore
            AffineTransform currentTransform = overallTransform;
            // Update the transform
            overallTransform.Concatenate(inGroupElement.Transform);
            // Call CopyContent() recursively for the group element's content
            CopyContent(inGroupElement.Group.Content, outGroupElement.Group.Content, outDoc, searchString);
            // Restore the transform
            overallTransform = currentTransform;
        }
        else
        {
            // Copy the content element to the output document
            outElement = ContentElement.Copy(outDoc, inElement);
            if (fragment == null && outElement is TextElement outTextElement)
            {
                // Special treatment for text element
                Text text = outTextElement.Text;
                // Find text fragment with string to replace
                for (int iFragment = text.Count - 1; iFragment >= 0; iFragment--)
                {
                    // In this sample, the fragment text must match in its entirety
                    if (text[iFragment].Text == searchString)
                    {
                        // Keep the found fragment for later use
                        fragment = text[iFragment];
                        // Update the transform
                        overallTransform.Concatenate(fragment.Transform);
                        // Remove the found text fragment from the output
                        text.RemoveAt(iFragment);
                        break;
                    }
                }
                // Prevent appending an empty text element
                if (text.Count == 0)
                    outElement = null;
            }
        }
        // Append the finished output element to the content generator
        if (outElement != null)
            generator.AppendContentElement(outElement);
    }
}

private static void AddText(Document doc, Page page, string replString)
{
    // Create a new text object
    Text text = Text.Create(doc);
    // Heuristic to map the extracted font base name to a font name and font family
    string[] parts = fragment.Font.BaseFont.Split('-');
    string family = parts[0];
    string style = parts.Length > 1 ? parts[1] : null;
    // Create a new font object
    Font font = Font.CreateFromSystem(doc, family, style, true);
    // Create a text generator and set the original fragment's properties
    using (TextGenerator textGenerator = new TextGenerator(text, font, fragment.FontSize, null))
    {
        textGenerator.CharacterSpacing = fragment.CharacterSpacing;
        textGenerator.WordSpacing = fragment.WordSpacing;
        textGenerator.HorizontalScaling = fragment.HorizontalScaling;
        textGenerator.Rise = fragment.Rise;
        textGenerator.Show(replString);
    }
    // Create a content generator
    using ContentGenerator contentGenerator = new ContentGenerator(page.Content, false);
    // Apply the computed transform
    contentGenerator.Transform(overallTransform);
    // Paint the new text
    contentGenerator.PaintText(text);
}

try (// Open input document
    FileStream inStream = new FileStream(inPath, FileStream.Mode.READ_ONLY);
    Document inDoc = Document.open(inStream, null);
    FileStream outStream = new FileStream(outPath, FileStream.Mode.READ_WRITE_NEW)) {
    try (// Create output document
        Document outDoc = Document.create(outStream, inDoc.getConformance(), null)) {

        // Copy document-wide data
        copyDocumentData(inDoc, outDoc);

        // Process each page
        for (Page inPage : inDoc.getPages()) {
            // Create empty output page
            Page outPage = Page.create(outDoc, inPage.getSize());
            // Copy page content from input to output and search for string
            CopyContent(inPage.getContent(), outPage.getContent(), outDoc, searchString);
            // If the text was found and deleted, add the replacement text
            if (fragment != null)
                AddText(outDoc, outPage, replString);
            // Add page to output document
            outDoc.getPages().add(outPage);
        }
    }
}

private static void copyDocumentData(Document inDoc, Document outDoc) throws PdfToolboxException, IOException {
    // Copy document-wide data

    // Output intent
    if (inDoc.getOutputIntent() != null)
        outDoc.setOutputIntent(IccBasedColorSpace.copy(outDoc, inDoc.getOutputIntent()));

    // Metadata
    outDoc.setMetadata(Metadata.copy(outDoc, inDoc.getMetadata()));

    // Viewer settings
    outDoc.setViewerSettings(ViewerSettings.copy(outDoc, inDoc.getViewerSettings()));

    // Associated files (for PDF/A-3 and PDF 2.0 only)
    FileReferenceList outAssociatedFiles = outDoc.getAssociatedFiles();
    for (FileReference inFileRef : inDoc.getAssociatedFiles())
        outAssociatedFiles.add(FileReference.copy(outDoc, inFileRef));

    // Plain embedded files
    FileReferenceList outEmbeddedFiles = outDoc.getPlainEmbeddedFiles();
    for (FileReference inFileRef : inDoc.getPlainEmbeddedFiles())
        outEmbeddedFiles.add(FileReference.copy(outDoc, inFileRef));
}

private static void CopyContent(Content inContent, Content outContent, Document outDoc, String searchString) throws PdfToolboxException, IOException {
    // Use a content extractor and a content generator to copy content
    ContentExtractor extractor = new ContentExtractor(inContent);
    try (ContentGenerator generator = new ContentGenerator(outContent, false)) {
        // Iterate over all content elements
        for (ContentElement inElement : extractor) {
            ContentElement outElement = null;
            // Special treatment for group elements
            if (inElement instanceof GroupElement) {
                GroupElement inGroupElement = (GroupElement)inElement;
                // Create empty output group element
                GroupElement outGroupElement = GroupElement.copyWithoutContent(outDoc, inGroupElement);
                outElement = outGroupElement;
                // Save transform for later restor
                AffineTransform currentTransform = overallTransform;
                // Update the transform
                overallTransform.concatenate(inGroupElement.getTransform());
                // Call CopyContent() recursively for the group element's content
                CopyContent(inGroupElement.getGroup().getContent(), outGroupElement.getGroup().getContent(), outDoc, searchString);
                // Restor the transform
                overallTransform = currentTransform;
            } else {
                // Copy the content element to the output document
                outElement = ContentElement.copy(outDoc, inElement);
                if (fragment == null && outElement instanceof TextElement) {
                    // Special treatment for text element
                    TextElement outTextElement = (TextElement)outElement;
                    Text text = outTextElement.getText();
                    // Find text fragment with string to replace
                    for (int iFragment = text.size() - 1; iFragment >= 0; iFragment--) {
                        // In this sample, the fragment text must match in its entirety
                        if (text.get(iFragment).getText().equals(searchString)) {
                            // Keep the found fragment for later use
                            fragment = text.get(iFragment);
                            // Update the transform
                            overallTransform.concatenate(fragment.getTransform());
                            // Remove the found text fragment from the output
                            text.remove(iFragment);
                            break;
                        }
                    }
                    // Prevent appending an empty text element
                    if (text.size() == 0)
                        outElement = null;
                }
            }
            // Append the finished output element to the content generator
            if (outElement != null)
                generator.appendContentElement(outElement);
        }
    }
}

private static void AddText(Document doc, Page page, String replString) throws CorruptException, PdfToolboxException, IOException {
    // Create a new text object
    Text text = Text.create(doc);
    // Heuristic to map the extracted fon base name to a font family and font style
    String[] parts = fragment.getFont().getBaseFont().split("-");
    String family = parts[0];
    String style = parts.length > 1 ? parts[1] : null;
    // Create a new font object
    Font font = Font.createFromSystem(doc, family, style, true);
    // Create a text generator and set the original fragment's properties
    try (TextGenerator textGenerator = new TextGenerator(text, font, fragment.getFontSize(), null)) {
        textGenerator.setCharacterSpacing(fragment.getCharacterSpacing());
        textGenerator.setWordSpacing(fragment.getWordSpacing());
        textGenerator.setHorizontalScaling(fragment.getHorizontalScaling());
        textGenerator.setRise(fragment.getRise());
        textGenerator.show(replString);
    }
    // Create a content generator
    try (ContentGenerator contentGenerator = new ContentGenerator(page.getContent(), false)) {
        // Apply the computed transform
        contentGenerator.transform(overallTransform);
        // Paint the new text
        contentGenerator.paintText(text);
    }
}