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a864b82a04
When using user-defined clipping planes, the i965 driver compacts the array of clipping planes so that disabled clipping planes do not appear in it--this saves precious push constant space and makes it easier to generate the pre-GEN6 clip program. As a result, when enabling clipping planes in GEN6+ hardware, we always enable clipping planes 0 through n-1 (where n is the number of clipping planes enabled), regardless of which clipping planes the user actually requested. However, we can't do this when using gl_ClipDistance, because it would be prohibitively complex to compact the gl_ClipDistance array inside the user-supplied vertex shader. So, when enabling clipping planes in GEN6+ hardware, if gl_ClipDistance is in use, we need to pass the user-supplied enable flags directly through to the hardware rather than just enabling the first n planes. Fixes Piglit test vs-clip-distance-enables. Reviewed-by: Kenneth Graunke <kenneth@whitecape.org> |
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