Follow-up from "Draft: Framework changes needed for HDR"
The following discussion from !132 should be addressed:
Can avoid two texture lookups by replacing with:
vec2 uv = texture2D(tex1, v_texcoord).rg - vec2(0.5); u = uv.x; v = uv.y;
I'm creating this issue for the three texture lookup optimizations that could be done as proposed above and in !132.
Before these can land, I would like to ensure that they are all covered by CI first. I think
XYUV is the missing piece in tests.