Emma Anholt
7371efdb3a
We were assertion failing on some large draws due to indices >16bits, despite asking draw to limit the max indices. I haven't managed to track it down, so flip us back to the older, non-index drawing path that doesn't hit this bug until it can get fixed. Leave an I915_DEBUG=vbuf flag around so we can look into this later. This is a pretty big performance hit for vertex shaders. Using glmark2 -b build:use-vbo=true: i915g-vbuf: 211 fps i915g-nonvbuf: 185 fps i915c: 41 fps Given how massively better i915g still is than i915c (llvmpipe VS instead of the classic swrast interpreter), I think it's still worth it to get i915g correct before we fix this perf regression. Fixes: #4971 Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13052>
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