f4275cc4df
This modify the GBuffer layout to store less bits per closures. This allows packing all closures into 64 bits or 96 bits. In turn, this reduces the amount of data stored for most usual materials. Moreover, this contain some groundwork for the getting rid of the hard-coded closure type. But evaluation shaders still use the hard-coded types. This adds tests for checking packing and unpacking of the gbuffer doesn't loose any data. Related to #115966 Pull Request: https://projects.blender.org/blender/blender/pulls/116476
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