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LibGL+LibSoftGPU: Implement glColorMaterial and GL_COLOR_MATERIAL

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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.
This commit is contained in:
Jelle Raaijmakers 2022-01-13 03:03:35 +01:00 • committed by Andreas Kling
parent 9d4c2f6308
commit 8e935ad3b1
8 changed files with 158 additions and 35 deletions
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3
Userland/Libraries/LibSoftGPU/Device.h
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@ -70,6 +70,9 @@ struct RasterizerOptions {
Array<TexCoordGenerationConfig, 4> texcoord_generation_config {};
Gfx::IntRect viewport;
bool lighting_enabled { false };
bool color_material_enabled { false };
ColorMaterialFace color_material_face { ColorMaterialFace::FrontAndBack };
ColorMaterialMode color_material_mode { ColorMaterialMode::AmbientAndDiffuse };
};
struct LightModelParameters {