52f1d0a0e1
Clamp in linear colorspace for some known transfer functions and gamuts, so that OpenColorIO can cancel out transfer functions. This eliminates for example PQ encode and decode transforms in the GPU shader. This does not eliminate all unnecessary operations though. In particular, many view transforms already explicitly or implicitly clamp to the same or a smaller gamut, making our clamping unnecessary. But there seems to be no generic way to detect this. Ref #144911 Pull Request: https://projects.blender.org/blender/blender/pulls/145025
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