[Mesa-dev] [PATCH 03/13] mesa: Add SYSTEM_VALUE_BASE_VERTEX

[Kenneth Graunke]

From: Ian Romanick <ian.d.romanick at intel.com>

This system value represents the basevertex value passed to
glDrawElementsBaseVertex and related functions.

Signed-off-by: Ian Romanick <ian.d.romanick at intel.com>
---
 src/mesa/main/mtypes.h                     | 15 ++++++++++++++-
 src/mesa/state_tracker/st_glsl_to_tgsi.cpp |  1 +
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index c603007..99037c6 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -2084,7 +2084,12 @@ typedef enum
     * gl_VertexID gets basevertex added in.  This differs from DirectX where
     * SV_VertexID does \b not get basevertex added in.
     *
-    * \sa SYSTEM_VALUE_VERTEX_ID_ZERO_BASE
+    * \note
+    * If all system values are available, \c SYSTEM_VALUE_VERTEX_ID will be
+    * equal to \c SYSTEM_VALUE_VERTEX_ID_ZERO_BASE plus
+    * \c SYSTEM_VALUE_BASE_VERTEX.
+    *
+    * \sa SYSTEM_VALUE_VERTEX_ID_ZERO_BASE, SYSTEM_VALUE_BASE_VERTEX
     */
    SYSTEM_VALUE_VERTEX_ID,
 
@@ -2126,6 +2131,14 @@ typedef enum
     * \sa SYSTEM_VALUE_VERTEX_ID, SYSTEM_VALUE_BASE_VERTEX
     */
    SYSTEM_VALUE_VERTEX_ID_ZERO_BASE,
+
+   /**
+    * Value of \c basevertex passed to \c glDrawElementsBaseVertex and similar
+    * functions.
+    *
+    * \sa SYSTEM_VALUE_VERTEX_ID, SYSTEM_VALUE_VERTEX_ID_ZERO_BASE
+    */
+   SYSTEM_VALUE_BASE_VERTEX,
    /*@}*/
 
    /**
diff --git a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
index 81f08cd..68c6b59 100644
--- a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
+++ b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
@@ -4172,6 +4172,7 @@ const unsigned _mesa_sysval_to_semantic[SYSTEM_VALUE_MAX] = {
    TGSI_SEMANTIC_VERTEXID,
    TGSI_SEMANTIC_INSTANCEID,
    0,
+   0,
 
    /* Geometry shader
     */
-- 
2.0.2