Kenneth Graunke <kenn...@whitecape.org> writes: > GLSL provides gradients for the 'r' coordinate (face ID), while our > hardware apparently ignores them. Sadly, this means that sample_d and > sample_d_c appear to be unsuitable for OpenGL, and need to be lowered.
'r' isn't a face ID in GLSL, though -- it's just the 3rd component of the vector pointing to texels. Did you mean it's used as face ID in hardware for sample_d/d_c?
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