[Mesa-dev] [PATCH 3/3] gallium/docs: add more info about TXF and MSAA textures

[Brian Paul]

If the texture is multisampled, the coord.w component indicates which
sample to fetch.
---
 src/gallium/docs/source/tgsi.rst | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/gallium/docs/source/tgsi.rst b/src/gallium/docs/source/tgsi.rst
index d7817cc..5bf9e95 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.
+  p *srJust 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.
-- 
1.9.1