Contrast Renderer

Contrast is a web-gpu based 2D renderer written in Rust. It renders planar vector graphics and can easily be integrated with other forward-rendering code. Filling uses implicit curves and is resolution-independent, while stroking uses parametric curves and is approximated via polygon tesselation. This way you can have logos, icons, text and other GUI elements - as classic 2D menu overlay on top of the 3D scene. - as HUD fixed relative to the camera movement but in the 3D scene. - on abitrary planes in the 3D scene: Decals on any flat surface such as a wall or simply mid air.

To get started, checkout the showcase example.

Feature Roadmap

âœ“ Supported and implemented
â—¯ Rudimentary support
âœ— Planned support, not implemented

Rendering
- Anti Aliasing â—¯
  - MSAA âœ“
- Custom (User Provided) Shaders âœ“
- Blending âœ“
- Instanced âœ—
Filling
- Paths
  - Polygons âœ“
  - Bezier Curves
    - Integral (Normal)
      - Quadratic âœ“
      - Cubic âœ“
    - Rational (Weighted)
      - Quadratic âœ“
      - Cubic âœ“
- Winding Fill Rules âœ“
- Nestable Clipping âœ“
Stroking
- Paths
  - Polygons âœ“
  - Bezier Curves
    - Approximation
      - Uniformly Spaced Parameters âœ“
      - Uniform Tangent Angle âœ“
      - Uniform Arc Length âœ—
    - Integral (Normal)
      - Quadratic âœ“
      - Cubic âœ“
    - Rational (Weighted)
      - Quadratic âœ“
      - Cubic âœ“
- Stroke Width âœ“
- Stroke Offset â—¯
- Closed / Open âœ“
- Line Joins
  - (Clipped) Miter âœ“
  - Bevel âœ“
  - Round âœ“
- Line Caps (Square, Round, Out, In, Right, Left, Butt) âœ“
- Dashing
  - Phase Translation âœ“
  - Repeating Gap Intervals âœ“
  - Dynamically Adjustable (for Animations) âœ“
Path Constructors
- Polygon âœ“
- Bezier Curves
  - Integral (Normal)
    - Quadratic âœ“
    - Cubic âœ“
  - Rational (Weighted)
    - Quadratic âœ“
    - Cubic âœ“
- Arc âœ“
- Rect âœ“
- Rounded Rect âœ“
- Ellipse âœ“
- Circle âœ“
- [Optional] Font (TTF)
  - Glyph âœ“
  - Text â—¯

Dependencies

Dev-Dependencies

GLSL to SPIRV compiler: shaderc

Dependencies of the Library

Graphics API: wgpu
Geometric Algebra: geometric_algebra
[Optional] Font Loader: ttf-parser

Dependencies of the Examples

Window API: winit
Logging: log