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authorNicolai Hähnle <[email protected]>2017-04-13 22:13:55 +0200
committerNicolai Hähnle <[email protected]>2017-04-14 22:50:06 +0200
commitf3d2cf6c1ff6ccf16c2a471f8f05c4ed5a734ae4 (patch)
tree1a4ed32a45e578cfcdc5f282a01dd5d562b2ce82 /src/gallium/docs
parent17f24a9b752fa3f7a412ca05ae7029d142785e59 (diff)
tgsi: clarify TGSI_SEMANTIC_{LAYER,VIEWPORT_INDEX}
Depending on pipe caps they can be writable in all vertex processing stages, but only the output of the last stage counts. Reviewed-by: Marek Olšák <[email protected]> Reviewed-by: Edward O'Callaghan <[email protected]>
Diffstat (limited to 'src/gallium/docs')
-rw-r--r--src/gallium/docs/source/tgsi.rst10
1 files changed, 10 insertions, 0 deletions
diff --git a/src/gallium/docs/source/tgsi.rst b/src/gallium/docs/source/tgsi.rst
index 89acb521ced..e740476ff09 100644
--- a/src/gallium/docs/source/tgsi.rst
+++ b/src/gallium/docs/source/tgsi.rst
@@ -3212,6 +3212,11 @@ For geometry shaders, this semantic label indicates that an output
contains the index of the viewport (and scissor) to use.
This is an integer value, and only the X component is used.
+If PIPE_CAP_TGSI_VS_LAYER_VIEWPORT or PIPE_CAP_TGSI_TES_LAYER_VIEWPORT is
+supported, then this semantic label can also be used in vertex or
+tessellation evaluation shaders, respectively. Only the value written in the
+last vertex processing stage is used.
+
TGSI_SEMANTIC_LAYER
"""""""""""""""""""
@@ -3221,6 +3226,11 @@ contains the layer value to use for the color and depth/stencil surfaces.
This is an integer value, and only the X component is used.
(Also known as rendertarget array index.)
+If PIPE_CAP_TGSI_VS_LAYER_VIEWPORT or PIPE_CAP_TGSI_TES_LAYER_VIEWPORT is
+supported, then this semantic label can also be used in vertex or
+tessellation evaluation shaders, respectively. Only the value written in the
+last vertex processing stage is used.
+
TGSI_SEMANTIC_CULLDIST
""""""""""""""""""""""