Pdf Clown - Skia Sharp

https://sourceforge.net/projects/clown/ mirror.

Fork Task

• Pdf rendering by SkiaSharp.
• UI integrations
  • Blazor (betta)
  • Xamarin.Forms (expired)
  • Avalonia UI (alfa)
  • Uno Platform (todo)
  • MAUI (todo)
• Competitive performance

Status

• Successfully render Pdf on 'SkiaSharp.SKCanvas'

  • Basic painting reguired just replace System.Drawing by SkiaSharp, thanks to author Stefano Chizzolini
  • New mandatory features of SkiaSharp(for Blazor, Tiling, Image Mask, Gradient and Patch shaders) by mattleibow
  • XObject Masking by warappa

• Change Code amd Docs formatting

• Rendering and Editing Pdf Annotations

• Move core projects to .net8 (Blazor on .net9)

• Performance improvements

  • PdfName cached globbaly
  • Suppress reflections invocation
  • A lot of PdfObjectWrappers replaced by direct PdfObject enhiritance
  • Force use of Memory<byte>, Span<byte>

• Fonts, Encryption, Functions, Shadings by integrate Apache PdfBox Project from mirror.

  • Source code translated from java to C#
  • Full Fonts processing & text rendering engine
  • LZW, CCITTFax and other fixes of Images loading engine
  • Decryption
  • Signature Fields - basic models
  • Functions 0-4
  • Shaders 4, 5, 6

• Images and ColorSpaces by integrate Mozilla Pdf.js

  • Source code translated from js to C#
  • JPX, CCITTFax, JBIG2 - decoding

TODO

• Release Nuget packages (maybe PdfClown.Skia, PdfClown.Skia.UI.Core, PdfClown.Skia.UI.Blazor)
• Rendering
  • Streaming decode filters and optimization
  • Alpha Masking won't work correctly after my refactoring
• Encryption.
  • Encryption not tested
  • Public key Certificat - requer completly rework PdfBox solution
  • Digital Signatures (MDS, DSS)