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tgsi: clarify TGSI_SEMANTIC_SAMPLEMASK documentation

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Reviewed-by: Marek Olšák <marek.olsak@amd.com>
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Brian Paul
2017-06-09 07:45:02 -06:00
parent 0ef39e588f
commit 81e15a5dea
1 changed files with 3 additions and 2 deletions
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src/gallium/docs/source/tgsi.rst
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@@ -3298,8 +3298,9 @@ TGSI_SEMANTIC_SAMPLEMASK
""""""""""""""""""""""""
For fragment shaders, this semantic label indicates that an output contains
the sample mask used to disable further sample processing
(i.e. gl_SampleMask). Only the X value is used, up to 32x MS.
the sample mask used to disable further sample processing. The output's
type is uint[4] but only the X component is used (i.e. gl_SampleMask[0]).
Each bit corresponds to one sample position (up to 32x MSAA is supported).
TGSI_SEMANTIC_INVOCATIONID
""""""""""""""""""""""""""