Clément Foucault
9505af72d4
This adds the possibility to use the `gpu_BaryCoord[NoPersp]` builtin to support barycentric coordinates without geometry shader. The `BuiltinBits::LAYER` builtin needs to be manually added to the `GPUShaderCreateInfo` in order to use this feature. Note: This is only available for shaders using `GPUShaderCreateInfo`. A geometry shader fallback is generated if the extension `AMD_shader_explicit_vertex_parameter` is not available. `NV_fragment_shader_barycentric` was not considered because it is not present inside the `glew.h` with use and seems to only be available with vulkan.
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