We are pleased to announce the release of Patagames Pdf.Net SDK. This is the most complete Pdfium.Net SDK release to date, and we encourage users to upgrade as soon as reasonable.
Product version:
4.108.2704
Assembly versions:
4.54.63.2704 - Pdfium.dll
1.53 - libpdfium.dylib
11.89.49.xx - Patagames.Pdf.dll
1.2.0.xx - Patagames.Pdf.Gdi.dll
4.31.23.xx - Patagames.Pdf.Wpf.dll
4.30.21.xx - Patagames.Pdf.WinForms.dll

Pdfium.Net SDK Release Notes

Low-Level API

• Enhanced Text Extraction: Improved the PDF-to-Plain-Text conversion algorithm to better reflect the visual layout of the page.
  
  • Added PdfText.AdvanceTextExtraction (high-level static property) and PDFText_LoadPageEx (low-level API) to toggle between advanced and legacy extraction modes (useful for complex layouts like newspapers).
    
• New API Functions: Added FPDFText_GetTextGapAtPoint to retrieve character indices at specific coordinates, including adjacent character data.
  
• Stability Fixes: Resolved a race condition ("choking" state) in TimerEx.
  
• Utilities: Added helper intersection methods to the FS_RECTF structure.
  

Viewer Components (WinForms, WPF, core PdfViewer)

• Performance Optimization:
  
  • Introduced the PdfViewer.IsTextSelected property. This allows the UI to check for the existence of a selection without the overhead of retrieving the full text string.
    
  • Refactored toolbars to observe IsTextSelected, significantly increasing UI responsiveness and preventing hangs when dealing with multi-page selections.
    
• Text Selection Enhancements:
  
  • Auto-Scrolling: Implemented scrolling when dragging the mouse outside the viewport during text selection.
    
  • Selection Logic: Improved the selection algorithm to allow starting/ending selections outside of text boundaries, enabling easier whole-line selection.
    
• Input & Mouse Handling:
  
  • WinForms: Fixed an issue where the cursor would not refresh after releasing CaptureMouse.
    
  • WPF/Core: Rewrote the CaptureMouse logic to ensure the capture is properly released in all states.
    

To get this release, please visit our download page.

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