From 39b9b05313c8b8fce9b80e96819aded479e382c9 Mon Sep 17 00:00:00 2001
From: Brian Paul <brian.paul@tungstengraphics.com>
Date: Wed, 2 Jul 2008 17:10:42 -0600
Subject: [PATCH] mesa: additional GLSL built-in constants

---
 src/mesa/main/mfeatures.h              |  1 +
 src/mesa/shader/slang/slang_simplify.c | 32 +++++++++++++++-----------
 2 files changed, 20 insertions(+), 13 deletions(-)

diff --git a/src/mesa/main/mfeatures.h b/src/mesa/main/mfeatures.h
index c3c337ea904..b08c017ec8d 100644
--- a/src/mesa/main/mfeatures.h
+++ b/src/mesa/main/mfeatures.h
@@ -44,6 +44,7 @@
 #define FEATURE_dlist  _HAVE_FULL_GL
 #define FEATURE_draw_read_buffer  _HAVE_FULL_GL
 #define FEATURE_drawpix  _HAVE_FULL_GL
+#define FEATURE_es2_glsl 0
 #define FEATURE_evaluators  _HAVE_FULL_GL
 #define FEATURE_feedback  _HAVE_FULL_GL
 #define FEATURE_fixedpt 0
diff --git a/src/mesa/shader/slang/slang_simplify.c b/src/mesa/shader/slang/slang_simplify.c
index 21d004db889..158d6bc8cfd 100644
--- a/src/mesa/shader/slang/slang_simplify.c
+++ b/src/mesa/shader/slang/slang_simplify.c
@@ -49,20 +49,26 @@ _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 },
-      { "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 },
+      { "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 },
+#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 },
+#endif
       { NULL, 0 }
    };
    GLuint i;
@@ -73,7 +79,7 @@ _slang_lookup_constant(const char *name)
          GLint value = -1.0;
          _mesa_GetIntegerv(info[i].Token, &value);
          ASSERT(value >= 0);  /* sanity check that glGetFloatv worked */
-         return value;
+         return value / info[i].Divisor;
       }
    }
    return -1;
-- 
2.30.2