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LibGL: Implement glShadeModel()

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This turns off interpolation of vertex colors when GL_FLAT is selected.
This commit is contained in:
Stephan Unverwerth 2021-05-16 14:05:13 +02:00 • committed by Andreas Kling
parent 26953c2be1
commit da57563c1c
7 changed files with 51 additions and 6 deletions
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17
Userland/Libraries/LibGL/SoftwareRasterizer.cpp
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@ -295,11 +295,16 @@ static void rasterize_triangle(const RasterizerOptions& options, Gfx::Bitmap& re
barycentric = barycentric * FloatVector3(triangle.vertices[0].w, triangle.vertices[1].w, triangle.vertices[2].w) * interpolated_w;
// FIXME: make this more generic. We want to interpolate more than just color and uv
auto rgba = interpolate(
FloatVector4(triangle.vertices[0].r, triangle.vertices[0].g, triangle.vertices[0].b, triangle.vertices[0].a),
FloatVector4(triangle.vertices[1].r, triangle.vertices[1].g, triangle.vertices[1].b, triangle.vertices[1].a),
FloatVector4(triangle.vertices[2].r, triangle.vertices[2].g, triangle.vertices[2].b, triangle.vertices[2].a),
barycentric);
FloatVector4 vertex_color;
if (options.shade_smooth) {
vertex_color = interpolate(
FloatVector4(triangle.vertices[0].r, triangle.vertices[0].g, triangle.vertices[0].b, triangle.vertices[0].a),
FloatVector4(triangle.vertices[1].r, triangle.vertices[1].g, triangle.vertices[1].b, triangle.vertices[1].a),
FloatVector4(triangle.vertices[2].r, triangle.vertices[2].g, triangle.vertices[2].b, triangle.vertices[2].a),
barycentric);
} else {
vertex_color = { triangle.vertices[0].r, triangle.vertices[0].g, triangle.vertices[0].b, triangle.vertices[0].a };
}
auto uv = interpolate(
FloatVector2(triangle.vertices[0].u, triangle.vertices[0].v),
@ -307,7 +312,7 @@ static void rasterize_triangle(const RasterizerOptions& options, Gfx::Bitmap& re
FloatVector2(triangle.vertices[2].u, triangle.vertices[2].v),
barycentric);
*pixel = pixel_shader(uv, rgba);
*pixel = pixel_shader(uv, vertex_color);
}
}