From 426673e27149576aac6285da47582a90cf8fe213 Mon Sep 17 00:00:00 2001 From: Brian Paul Date: Wed, 2 Aug 2017 11:06:28 -0600 Subject: gallium/docs: add more info about TXF and MSAA textures If the texture is multisampled, the coord.w component indicates which sample to fetch. Reviewed-by: Roland Scheidegger --- src/gallium/docs/source/tgsi.rst | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'src') diff --git a/src/gallium/docs/source/tgsi.rst b/src/gallium/docs/source/tgsi.rst index d7817cc9d0e..d1e7c88905e 100644 --- a/src/gallium/docs/source/tgsi.rst +++ b/src/gallium/docs/source/tgsi.rst @@ -951,7 +951,9 @@ XXX doesn't look like most of the opcodes really belong here. image or PIPE_BUFFER resource. The source sampler may not be a CUBE or SHADOW. src 0 is a four-component signed integer vector used to identify the single texel - accessed. 3 components + level. Just like texture instructions, an optional + accessed. 3 components + level. If the texture is multisampled, then + the fourth component indicates the sample, not the mipmap level. + Just like texture instructions, an optional offset vector is provided, which is subject to various driver restrictions (regarding range, source of offsets). This instruction ignores the sampler state. -- cgit v1.2.3