SixLabors.ImageSharp.Drawing

ImageSharp.Drawing is a cross-platform 2D drawing library built on top of ImageSharp. It adds a rich vector drawing model for composing raster images, rendering text, shaping paths, masking image-processing operations, and targeting CPU or WebGPU-backed drawing surfaces from the same DrawingCanvas API.

The core package targets .NET 8 and provides the default CPU backend. The optional SixLabors.ImageSharp.Drawing.WebGPU package adds GPU-backed rendering for native windows, external surfaces, and offscreen render targets.

Capabilities

• Draw and fill paths, lines, arcs, ellipses, pies, rectangles, rounded rectangles, regular polygons, stars, and arbitrary PathBuilder geometry.
• Use solid, pattern, image, recolor, linear gradient, radial gradient, elliptic gradient, sweep gradient, and path gradient brushes.
• Stroke paths and polylines with configurable width, caps, joins, dash patterns, and stroke options.
• Render text with SixLabors.Fonts, including rich text runs, fallback fonts, bidirectional text, vertical layout, glyph paths, text measurement, wrapped text, and text-on-path scenarios.
• Compose with transforms, clipping, save/restore state, isolated layers, blend options, opacity, and region canvases.
• Use paths as masks for ImageSharp processors with canvas.Apply(...), or fill paths with images via ImageBrush.
• Create retained drawing scenes and render them repeatedly to compatible targets.
• Render into Image<TPixel> memory with the CPU backend, or into WebGPU windows, external host surfaces, and offscreen render targets with the WebGPU backend.

Quick Start

Draw into an Image<TPixel> with the CPU backend:

image.Mutate(ctx => ctx.Paint(canvas =>
{
    // A fill without geometry paints the entire canvas.
    canvas.Fill(Brushes.Solid(Color.White));

    // Brushes can be reused across paths or used directly for full-canvas fills.
    canvas.Fill(new LinearGradientBrush(
        new PointF(0, 0),
        new PointF(400, 300),
        GradientRepetitionMode.None,
        new ColorStop(0F, Color.CornflowerBlue),
        new ColorStop(1F, Color.MediumSeaGreen)));

    // Built-in polygon types are regular IPath instances accepted by Fill and Draw.
    canvas.Fill(Brushes.Solid(Color.HotPink), new EllipsePolygon(200, 200, 100));
    canvas.Draw(Pens.Solid(Color.Navy, 3F), new RoundedRectanglePolygon(50, 50, 200, 100, 16));
}));

Draw into a native WebGPU window with the same canvas-facing API:

using WebGPUWindow window = new(new WebGPUWindowOptions
{
    Title = "ImageSharp.Drawing",
    Size = new Size(800, 600),
    Format = WebGPUTextureFormat.Bgra8Unorm,
    PresentMode = WebGPUPresentMode.Fifo,
});

window.Run(frame =>
{
    DrawingCanvas canvas = frame.Canvas;

    // WebGPU frames expose the same DrawingCanvas API as CPU image processing.
    canvas.Fill(Brushes.Solid(Color.Black));
    canvas.Fill(Brushes.Solid(Color.CornflowerBlue), new EllipsePolygon(400, 300, 120));
});

License

• ImageSharp.Drawing is licensed under the Six Labors Split License, Version 1.0

Support Six Labors

Support the efforts of the development of the Six Labors projects.

• Purchase a Commercial License ❤️
• Become a sponsor via GitHub Sponsors ❤️
• Become a sponsor via Open Collective ❤️

Documentation

• Detailed documentation for the ImageSharp.Drawing API is available. This includes additional conceptual documentation to help you get started.
• Our Samples Repository is also available containing buildable code samples demonstrating common activities.

Questions?

• Do you have questions? We are happy to help! Please join our Discussions Forum, or ask them on stackoverflow using the ImageSharp tag. Do not open issues for questions!
• Please read our Contribution Guide before opening issues or pull requests!

Code of Conduct

This project has adopted the code of conduct defined by the Contributor Covenant to clarify expected behavior in our community. For more information, see the .NET Foundation Code of Conduct.

Installation

Install stable releases via NuGet; development releases are available via MyGet.

Package Name	Release (NuGet)	Nightly (MyGet)
SixLabors.ImageSharp.Drawing
SixLabors.ImageSharp.Drawing.WebGPU

Manual build

If you prefer, you can compile ImageSharp.Drawing yourself (please do and help!)

• Using Visual Studio 2022
  • Make sure you have the latest version installed
  • Make sure you have the .NET 8 SDK installed

Alternatively, you can work from command line and/or with a lightweight editor on both Linux/Unix and Windows:

• Visual Studio Code with C# Extension
• the .NET 8 SDK

To clone ImageSharp.Drawing locally, click the "Clone in [YOUR_OS]" button above or run the following git commands:

git clone https://github.com/SixLabors/ImageSharp.Drawing

If working with Windows please ensure that you have enabled log file paths in git (run as Administrator).

git config --system core.longpaths true

Submodules

This repository contains git submodules. To add the submodules to the project, navigate to the repository root and type:

git submodule update --init --recursive

How can you help?

Please... Spread the word, contribute algorithms, submit performance improvements, unit tests, no input is too little. Make sure to read our Contribution Guide before opening a PR.

The ImageSharp.Drawing Team

• Scott Williams
• James Jackson-South
• Dirk Lemstra
• Anton Firsov
• Brian Popow

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Special thanks to JetBrains for supporting us with open-source licenses for their IDEs.