From d5835c1d0f7d3af9169a61e13646247c6a8b01b4 Mon Sep 17 00:00:00 2001
From: Brian Paul <brian.paul@tungstengraphics.com>
Date: Wed, 23 Jul 2008 15:14:22 -0600
Subject: [PATCH] mesa: glsl: fix/simplify built-in constant lookup

---
 src/mesa/shader/slang/slang_simplify.c | 42 ++++++++++++++++++++--------------
 1 file changed, 25 insertions(+), 17 deletions(-)

diff --git a/src/mesa/shader/slang/slang_simplify.c b/src/mesa/shader/slang/slang_simplify.c
index 88ca83d..9a4b6a8 100644
--- a/src/mesa/shader/slang/slang_simplify.c
+++ b/src/mesa/shader/slang/slang_simplify.c
@@ -37,6 +37,15 @@
 #include "slang_print.h"
 
 
+#ifndef GL_MAX_FRAGMENT_UNIFORM_VECTORS
+#define GL_MAX_FRAGMENT_UNIFORM_VECTORS     0x8DFD
+#endif
+#ifndef GL_MAX_VERTEX_UNIFORM_VECTORS
+#define GL_MAX_VERTEX_UNIFORM_VECTORS       0x8DFB
+#endif
+#ifndef GL_MAX_VARYING_VECTORS
+#define GL_MAX_VARYING_VECTORS              0x8DFC
+#endif
 
 
 /**
@@ -49,25 +58,24 @@ _slang_lookup_constant(const char *name)
    struct constant_info {
       const char *Name;
       const GLenum Token;
-      GLint Divisor;
    };
    static const struct constant_info info[] = {
-      { "gl_MaxClipPlanes", GL_MAX_CLIP_PLANES, 1 },
-      { "gl_MaxCombinedTextureImageUnits", GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS, 1 },
-      { "gl_MaxDrawBuffers", GL_MAX_DRAW_BUFFERS, 1 },
-      { "gl_MaxFragmentUniformComponents", GL_MAX_FRAGMENT_UNIFORM_COMPONENTS, 1 },
-      { "gl_MaxLights", GL_MAX_LIGHTS, 1 },
-      { "gl_MaxTextureUnits", GL_MAX_TEXTURE_UNITS, 1 },
-      { "gl_MaxTextureCoords", GL_MAX_TEXTURE_COORDS, 1 },
-      { "gl_MaxVertexAttribs", GL_MAX_VERTEX_ATTRIBS, 1 },
-      { "gl_MaxVertexUniformComponents", GL_MAX_VERTEX_UNIFORM_COMPONENTS, 1 },
-      { "gl_MaxVaryingFloats", GL_MAX_VARYING_FLOATS, 1 },
-      { "gl_MaxVertexTextureImageUnits", GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS, 1 },
-      { "gl_MaxTextureImageUnits", GL_MAX_TEXTURE_IMAGE_UNITS, 1 },
+      { "gl_MaxClipPlanes", GL_MAX_CLIP_PLANES },
+      { "gl_MaxCombinedTextureImageUnits", GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS },
+      { "gl_MaxDrawBuffers", GL_MAX_DRAW_BUFFERS },
+      { "gl_MaxFragmentUniformComponents", GL_MAX_FRAGMENT_UNIFORM_COMPONENTS },
+      { "gl_MaxLights", GL_MAX_LIGHTS },
+      { "gl_MaxTextureUnits", GL_MAX_TEXTURE_UNITS },
+      { "gl_MaxTextureCoords", GL_MAX_TEXTURE_COORDS },
+      { "gl_MaxVertexAttribs", GL_MAX_VERTEX_ATTRIBS },
+      { "gl_MaxVertexUniformComponents", GL_MAX_VERTEX_UNIFORM_COMPONENTS },
+      { "gl_MaxVaryingFloats", GL_MAX_VARYING_FLOATS },
+      { "gl_MaxVertexTextureImageUnits", GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS },
+      { "gl_MaxTextureImageUnits", GL_MAX_TEXTURE_IMAGE_UNITS },
 #if FEATURE_es2_glsl
-      { "gl_MaxVertexUniformVectors", GL_MAX_VERTEX_UNIFORM_COMPONENTS, 4 },
-      { "gl_MaxVaryingVectors", GL_MAX_VARYING_FLOATS, 4 },
-      { "gl_MaxFragmentUniformVectors", GL_MAX_FRAGMENT_UNIFORM_COMPONENTS, 4 },
+      { "gl_MaxVertexUniformVectors", GL_MAX_VERTEX_UNIFORM_VECTORS },
+      { "gl_MaxVaryingVectors", GL_MAX_VARYING_VECTORS },
+      { "gl_MaxFragmentUniformVectors", GL_MAX_FRAGMENT_UNIFORM_VECTORS },
 #endif
       { NULL, 0 }
    };
@@ -79,7 +87,7 @@ _slang_lookup_constant(const char *name)
          GLint value = -1;
          _mesa_GetIntegerv(info[i].Token, &value);
          ASSERT(value >= 0);  /* sanity check that glGetFloatv worked */
-         return value / info[i].Divisor;
+         return value;
       }
    }
    return -1;
-- 
2.7.4