Jelle Raaijmakers 8e935ad3b1 LibGL+LibSoftGPU: Implement glColorMaterial and GL_COLOR_MATERIAL ...

When `GL_COLOR_MATERIAL` is enabled, specific material parameters can
be overwritten by the current color per-vertex during the lighting
calculations. Which parameter is controlled by `glColorMaterial`.

Also move the lighting calculations _before_ clipping, because the spec
says so. As a result, we interpolate the resulting vertex color instead
of the input color.

2022-01-13 12:13:58 +01:00

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