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A comment on Rasterizer: A GPU-accelerated 2D vector graphics engine in ~4k LOC. Parent comment

Re:Rasterizer: A GPU-accelerated 2D vector graphics engine i... by cubefox on Friday September 05, 2025 @08:11AM (#45137617)
Stupid question: Why not use the hardware (fixed function) rasterizer inside the GPU? I guess that one is only optimized for triangles.
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Re:Rasterizer: A GPU-accelerated 2D vector graphics engine i... by mindbrix on Friday September 05, 2025 @08:24AM (#45137703)
Good question and answer ;-)
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Re:Rasterizer: A GPU-accelerated 2D vector graphics engine i... by mindbrix on Friday September 05, 2025 @08:54AM (#45137965)
The longer answer is that using straight-edged geometry to represent curves is a resolution-dependent operation, e.g. a full screen circle may need to be flattened to an 80-sided polygon.

Rasterizer can solve quadratic curves in the fragment shaders, which massively reduces the geometry needed for a scene.

Also, the native rasterizer only supports MSAA, which is inferior to reference analytic area AA.

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