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-rw-r--r--src/gallium/docs/source/tgsi.rst22
-rw-r--r--src/gallium/include/pipe/p_shader_tokens.h3
2 files changed, 22 insertions, 3 deletions
diff --git a/src/gallium/docs/source/tgsi.rst b/src/gallium/docs/source/tgsi.rst
index 3af1fb717a2..926527151c4 100644
--- a/src/gallium/docs/source/tgsi.rst
+++ b/src/gallium/docs/source/tgsi.rst
@@ -2400,14 +2400,32 @@ Edge flags are used to control which lines or points are actually
drawn when the polygon mode converts triangles/quads/polygons into
points or lines.
+
TGSI_SEMANTIC_STENCIL
-""""""""""""""""""""""
+"""""""""""""""""""""
-For fragment shaders, this semantic label indicates than an output
+For fragment shaders, this semantic label indicates that an output
is a writable stencil reference value. Only the Y component is writable.
This allows the fragment shader to change the fragments stencilref value.
+TGSI_SEMANTIC_VIEWPORT_INDEX
+""""""""""""""""""""""""""""
+
+For geometry shaders, this semantic label indicates that an output
+contains the index of the viewport (and scissor) to use.
+Only the X value is used.
+
+
+TGSI_SEMANTIC_LAYER
+"""""""""""""""""""
+
+For geometry shaders, this semantic label indicates that an output
+contains the layer value to use for the color and depth/stencil surfaces.
+Only the X value is used. (Also known as rendertarget array index.)
+
+
+
Declaration Interpolate
^^^^^^^^^^^^^^^^^^^^^^^
diff --git a/src/gallium/include/pipe/p_shader_tokens.h b/src/gallium/include/pipe/p_shader_tokens.h
index b33cf1d5213..c984d50abe9 100644
--- a/src/gallium/include/pipe/p_shader_tokens.h
+++ b/src/gallium/include/pipe/p_shader_tokens.h
@@ -165,7 +165,8 @@ struct tgsi_declaration_interp
#define TGSI_SEMANTIC_TEXCOORD 19 /**< texture or sprite coordinates */
#define TGSI_SEMANTIC_PCOORD 20 /**< point sprite coordinate */
#define TGSI_SEMANTIC_VIEWPORT_INDEX 21 /**< viewport index */
-#define TGSI_SEMANTIC_COUNT 22 /**< number of semantic values */
+#define TGSI_SEMANTIC_LAYER 22 /**< layer (rendertarget index) */
+#define TGSI_SEMANTIC_COUNT 23 /**< number of semantic values */
struct tgsi_declaration_semantic
{