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skia4delphi

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6.2.0

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Skia4Delphi is an open-source, cross-platform 2D graphics library for Delphi, utilizing the esteemed Google's Skia library.

skia.mp4

About

Skia is an exceptional open-source library dedicated to rendering 2D text, geometries and images, with a focus on precision, superior quality and high performance. It offers versatile APIs compatible with a wide range of hardware and software platforms.

Google's Skia Graphics Library functions as the graphics engine for numerous products, including Google Chrome, Chrome OS, Android, Flutter, Xamarin, Mozilla Firefox, Firefox OS, and more.

Features

Canvas 2D and Text Layout;
CPU software rasterization;
GPU-accelerated rendering;
Right-to-Left rendering;
SVG rendering and creation;
PDF output;
Runtime effects;
Shading language;
Shaders, mask and color filters;
Image and path effects;
Animated image player; (Lottie, GIF, WebP)
Image codecs; (bmp, gif, ico, jpg, png, wbmp, webp and raw images) and much more...

FMX render replacement

Using the Skia4Delphi library it is possible to override Firemonkey's graphic engine so that it can use Skia as its default Canvas. With that, your Firemonkey application will automatically:

Draw with antialiasing on any platform (the drawing quality is based on the Form.Quality property);
Increase the overall graphics performance of your application by up to 50% (even drawing with higher quality);
Resize images with better quality (also based on Form.Quality);
Support Right-To-Left text rendering;
Fix dozens of inconsistencies in drawings (especially in corners and strokes, such as dashes, and in texts with special emojis);
Increase the performance of the library in general (controls, drawings, among others...).

Learn more...

Summary

Using the library
- Prerequisites
  - Install
  - Enable Skia
- Examples
  - Basic usage
  - PDF
  - Codecs
Integration with Delphi
- Bitmap
- Image formats
- FMX Render
  - Enable Skia Render
  - Benchmark
  - Skia canvas
  - Right-to-Left
  - Custom fonts
Controls VCL/FMX
- TSkAnimatedImage
- TSkLabel
- TSkPaintBox
- TSkSvg
  - Limitations
Compatibility
Documentation
Version

Using the library

Prerequisites

Install

You can install Skia4Delphi in 3 ways:

Setup (recommended)

Download the setup of latest release and install it.

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PDF

With Skia4Delphi it is possible to create PDF documents and draw anything on them, from text to images. The example below demonstrates how to create an PDF document and draw an SVG inside it:

  var LSVGDOM := TSkSVGDOM.MakeFromFile('SamplesDemoAssetslion.svg');
  var LSize := TSizeF.Create(600, 600);
  LSVGDOM.SetContainerSize(LSize);

  var LDocumentStream := TFileStream.Create('output.pdf', fmCreate);
  try
    var LDocument := TSkDocument.MakePDF(LDocumentStream);
    try
      var LCanvas := LDocument.BeginPage(LSize.Width, LSize.Height);
      try
        // Draw anything here with Skia canvas
        LSVGDOM.Render(LCanvas);
      finally
        LDocument.EndPage;
      end;
    finally
      LDocument.Close;
    end;
  finally
    LDocumentStream.Free;
  end;

This code results in the output below:

Codecs

The Skia4Delphi library supports many image formats. See below the list:

Supported formats for decoding

Image Format	Extensions
Bitmap	.bmp
GIF	.gif
Icon	.ico
JPEG	.jpg, .jpeg
PNG	.png
Raw Adobe DNG Digital Negative	.dng
Raw Canon	.cr2
Raw Fujifilm RAF	.raf
Raw Nikon	.nef, .nrw
Raw Olympus ORF	.orf
Raw Panasonic	.rw2
Raw Pentax PEF	.pef
Raw Samsung SRW	.srw
Raw Sony	.arw
WBMP	.wbmp
WebP	.webp

Note: Raw images are limited to non-windows platforms

Supported formats for encoding

Image Format Extensions

JPEG .jpg, .jpeg

PNG .png

WebP .webp

Image Format	Extensions
JPEG	.jpg, .jpeg
PNG	.png
WebP	.webp

About WebP

WebP is a modern image format that provides superior lossless and lossy compression for images. WebP lossless images are 26% smaller in size compared to PNGs. WebP lossy images are 25-34% smaller than comparable JPEG images at equivalent quality.

The example below demonstrates how to encoder to WebP format:

  var LImage := TSkImage.MakeFromEncodedFile('SamplesDemoAssetskung-fu-panda.png');
  LImage.EncodeToFile('output.webp', TSkEncodedImageFormat.WEBP, 80);
  LImage.EncodeToFile('output.jpg', TSkEncodedImageFormat.JPEG, 80);

This code results in the output below:

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Compatibility

RAD Studio	Platforms
RAD Studio 11 Alexandria or newer	All Platforms
RAD Studio 10.3 Rio or newer	Windows, Android
RAD Studio XE7 or newer	Windows

For the platforms supported by Skia4Delphi (listed above), the OS versions supported by the library are the same OS versions that RAD Studio supports.