4-Heights™ PDF Toolbox SDK – Edit, combine and create PDF in C# .NET Core and Java

Document assembly

• Copy pages from existing PDFs
• Copy annotations, form fields, links, logical structure, destinations, outlines, layers
• Flatten annotations, form fields, signatures
• Optimize resources
• Crop and rotate pages
• Free composition of content: Overlays, Underlays, Stamps, Transformations
• Encryption: User password, Owner password, Permissions
• Copy and modify document metadata
• Copy and modify page metadata
• Add embedded files and associated files
• Get and set OpenAction destination

Generation

• Document Level
  • Create pages
    • Create form fields
    • General text fields and comb text fields
    • Check boxes
    • Radio button groups
    • List boxes
    • Combo boxes
  • Create new outline items and insert them at any position in the tree
  • Destinations: Named and direct destinations in the same document
• Page Content Level
  • Create new PDF content from scratch
  • Apply content to existing pages
• Colors
  • Device colors: RGB, CMYK and Grayscale
  • ICC color profiles
  • Transparency: Alpha and Blend mode
• Paths
  • Single and Multi-segment lines
  • Rectangle, Circle, Bezier curves, Ellipse, Arc, Pie
  • Filling, stroking, clipping and combinations thereof
  • Line width, cap, join, dash array, dash phase and miter limit
  • Inside rule: Nonzero winding rule, Even/odd rule
• Text
  • Font size, Character spacing, Word spacing
  • Horizontal scaling, leading, rise
  • Enables simple text layouting
  • Standard PDF fonts, installed fonts
  • Font metrics: Italic angle, Ascent, Descent, Cap height, Character width
  • Unicode characters
  • Text stroke: Line width, Line join and Dashes
  • Fill and stroke text, invisible text
  • Use text as clipping path
• Images
  • Bi-level: CCITT G3, G3 2D and G4, Flate, LZW, Packbits, uncompressed
  • 4 bit and 8 bit grayscale: Flate, LZW, Packbits, JPEG and JPEG-6 (8 bit only), uncompressed
  • RGB: Flate, JPEG and JPEG-6, LZW, Packbits, uncompressed
• Transformations
  • Translation
  • Scaling
  • Skewing (Horizontal, Vertical)
  • Rotation

• Annotations
  • Web link annotations
  • File attachment annotations
  • Free text annotation
  • Sticky note annotation
  • Text stamp annotation
  • Custom stamp annotation
  • Circle annotation
  • Square annotation
  • Line annotation
  • Polyline annotation
  • Polygon annotation
  • Free drawing ("ink") annotation

Modification

• Page Content
  • Selective deletion of content elements (without markup)
  • Geometric transformation of content elements (without markup)
• Annotations
  • Web link annotations’ target URIs
  • Markup annotations’ location, creation/modification date, subject, author, content
• Form Fields
  • Deletion of fields and modification of field values for
    • General text fields and comb text fields
    • Check boxes
    • Radio button groups
    • List boxes
    • Combo boxes

Extraction

• Document and Page
  • Document information entries: Title, Author, Subject, Keywords, Creator, Producer, Creation date, Modification date
  • Document XMP metadata
  • Document encryption settings
  • Embedded files
  • Page bounding boxes: Media box, Crop box, Bleed box, Trim box, Art box
  • Page XMP metadata
  • Outline item tree: Tree structure, item title, expanded/collapsed
  • Destinations: Named and direct destinations in the same document
  • Viewer settings
• Content
  • Page’s and group’s content elements including
    • Bounding box
    • Affine transformation
  • As either of the following:
    • Group element
    • Image element
      • Width and height in pixel
      • Bits per component
      • Color space
  • Image mask element
    • Width and height in pixel
    • Paint for filling the mask
  • Path element
    • Alignment box
    • Fill parameters including paint and fill rule
    • Stroke parameters including line paint and line style
  • Shading element
  • Text element
    • Text fragments
      • Bounding box
      • Affine transformation
      • Unicode string
      • Fill parameters including paint and fill rule
      • Stroke parameters including line paint and line style
• Annotations
  • Annotations: location
  • Markup annotation: type, location, creation/modification date, subject, author, content
  • Custom stamp annotations: appearance
  • Link annotations: location, target destination or URI
  • Signature fields: name, location, reason, contact info, date, visibility
• AcroForm Form Fields
  • Form field identifiers, export names and user names, including form field hierarchy
  • Form field export and display content of:
    • Push buttons
    • Check boxes
    • Radio button groups
    • General text fields and comb text fields
    • List boxes
    • Combo boxes

• ISO 32000-1 (PDF 1.7)
• ISO 32000-2 (PDF 2.0)
• ISO 19005-1 (PDF/A-1)
• ISO 19005-2 (PDF/A-2)
• ISO 19005-3 (PDF/A-3)