Iago Toral Quiroga
1c4c7d95f7
For example, regarding gl_SampleID, the GLSL spec states:
"Any static use of this variable in a fragment shader causes the
entire shader to be evaluated per-sample."
So we need to track if the fragment shader does anything that implicitly
enables per-sample shading in the compiler for the driver to
auto-enable sample rate shading if needed.
v2:
- Instead of tracking reads of gl_SampleID, check SYSTEM_BIT_SAMPLE_ID
and SYSTEM_BIT_SAMPLE_POS as well as the sample layout qualifier like
other drivers are doing to activate this behavior (Eric).
Reviewed-by: Alejandro Piñeiro <apinheiro@igalia.com> (v1)
Reviewed-by: Eric Anholt <eric@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6766>
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