implemented GL_EXT_histogram extension

6 files changed, 130 insertions, 75 deletions

diff --git a/src/mesa/main/drawpix.c b/src/mesa/main/drawpix.c
index 38ffcc85462..f2bbd8a913f 100644
--- a/src/mesa/main/drawpix.c
+++ b/src/mesa/main/drawpix.c
@@ -1,4 +1,4 @@
-/* $Id: drawpix.c,v 1.21 2000/04/18 14:32:10 brianp Exp $ */
+/* $Id: drawpix.c,v 1.22 2000/05/04 13:48:49 brianp Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -123,6 +123,7 @@ simple_DrawPixels( GLcontext *ctx, GLint x, GLint y,
        && !ctx->Pixel.ColorTableEnabled
        && !ctx->Pixel.PostColorMatrixColorTableEnabled
        && !ctx->Pixel.MinMaxEnabled
+       && !ctx->Pixel.HistogramEnabled
        && ctx->Pixel.IndexShift==0 && ctx->Pixel.IndexOffset==0
        && ctx->Pixel.MapColorFlag==0
        && ctx->Texture.ReallyEnabled == 0
diff --git a/src/mesa/main/enable.c b/src/mesa/main/enable.c
index 8c71d87cd0f..b5e659afd10 100644
--- a/src/mesa/main/enable.c
+++ b/src/mesa/main/enable.c
@@ -1,4 +1,4 @@
-/* $Id: enable.c,v 1.15 2000/04/12 00:27:37 brianp Exp $ */
+/* $Id: enable.c,v 1.16 2000/05/04 13:48:49 brianp Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -154,6 +154,9 @@ void _mesa_set_enable( GLcontext *ctx, GLenum cap, GLboolean state )
             ctx->NewState |= NEW_FOG|NEW_RASTER_OPS;
          }
 	 break;
+      case GL_HISTOGRAM:
+         ctx->Pixel.HistogramEnabled = state;
+         break;
       case GL_LIGHT0:
       case GL_LIGHT1:
       case GL_LIGHT2:
@@ -268,6 +271,9 @@ void _mesa_set_enable( GLcontext *ctx, GLenum cap, GLboolean state )
       case GL_MAP2_VERTEX_4:
 	 ctx->Eval.Map2Vertex4 = state;
 	 break;
+      case GL_MINMAX:
+         ctx->Pixel.MinMaxEnabled = state;
+         break;
       case GL_NORMALIZE:
 	 if (ctx->Transform.Normalize != state) {
 	    ctx->Transform.Normalize = state;
@@ -552,6 +558,8 @@ _mesa_IsEnabled( GLenum cap )
 	 return ctx->Color.DitherFlag;
       case GL_FOG:
 	 return ctx->Fog.Enabled;
+      case GL_HISTOGRAM:
+         return ctx->Pixel.HistogramEnabled;
       case GL_LIGHTING:
          return ctx->Light.Enabled;
       case GL_LIGHT0:
@@ -607,6 +615,8 @@ _mesa_IsEnabled( GLenum cap )
 	 return ctx->Eval.Map2Vertex3;
       case GL_MAP2_VERTEX_4:
 	 return ctx->Eval.Map2Vertex4;
+      case GL_MINMAX:
+         return ctx->Pixel.MinMaxEnabled;
       case GL_NORMALIZE:
 	 return ctx->Transform.Normalize;
       case GL_POINT_SMOOTH:
diff --git a/src/mesa/main/extensions.c b/src/mesa/main/extensions.c
index bd203e62a33..6c0837de138 100644
--- a/src/mesa/main/extensions.c
+++ b/src/mesa/main/extensions.c
@@ -1,4 +1,4 @@
-/* $Id: extensions.c,v 1.24 2000/04/17 15:13:53 brianp Exp $ */
+/* $Id: extensions.c,v 1.25 2000/05/04 13:48:49 brianp Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -59,6 +59,7 @@ static struct { int enabled; const char *name; } default_extensions[] = {
    { DEFAULT_ON,     "GL_EXT_blend_subtract" },
    { DEFAULT_ON,     "GL_EXT_clip_volume_hint" },
    { DEFAULT_ON,     "GL_EXT_compiled_vertex_array" },
+   { DEFAULT_ON,     "GL_EXT_histogram" },
    { DEFAULT_ON,     "GL_EXT_paletted_texture" },
    { DEFAULT_ON,     "GL_EXT_point_parameters" },
    { ALWAYS_ENABLED, "GL_EXT_polygon_offset" },
diff --git a/src/mesa/main/get.c b/src/mesa/main/get.c
index 1d37a298bf4..0282c588336 100644
--- a/src/mesa/main/get.c
+++ b/src/mesa/main/get.c
@@ -1,4 +1,4 @@
-/* $Id: get.c,v 1.21 2000/04/12 00:27:37 brianp Exp $ */
+/* $Id: get.c,v 1.22 2000/05/04 13:48:49 brianp Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -347,6 +347,9 @@ _mesa_GetBooleanv( GLenum pname, GLboolean *params )
       case GL_GREEN_SCALE:
          *params = FLOAT_TO_BOOL(ctx->Pixel.GreenScale);
 	 break;
+      case GL_HISTOGRAM:
+         *params = ctx->Pixel.HistogramEnabled;
+	 break;
       case GL_INDEX_BITS:
          *params = INT_TO_BOOL( ctx->Visual->IndexBits );
 	 break;
@@ -568,6 +571,9 @@ _mesa_GetBooleanv( GLenum pname, GLboolean *params )
 	 params[0] = INT_TO_BOOL(MAX_WIDTH);
 	 params[1] = INT_TO_BOOL(MAX_HEIGHT);
 	 break;
+      case GL_MINMAX:
+         *params = ctx->Pixel.MinMaxEnabled;
+         break;
       case GL_MODELVIEW_MATRIX:
 	 for (i=0;i<16;i++) {
 	    params[i] = FLOAT_TO_BOOL(ctx->ModelView.m[i]);
@@ -1399,6 +1405,9 @@ _mesa_GetDoublev( GLenum pname, GLdouble *params )
       case GL_GREEN_SCALE:
          *params = (GLdouble) ctx->Pixel.GreenScale;
          break;
+      case GL_HISTOGRAM:
+         *params = (GLdouble) ctx->Pixel.HistogramEnabled;
+	 break;
       case GL_INDEX_BITS:
          *params = (GLdouble) ctx->Visual->IndexBits;
 	 break;
@@ -1620,6 +1629,9 @@ _mesa_GetDoublev( GLenum pname, GLdouble *params )
          params[0] = (GLdouble) MAX_WIDTH;
          params[1] = (GLdouble) MAX_HEIGHT;
          break;
+      case GL_MINMAX:
+         *params = (GLdouble) ctx->Pixel.MinMaxEnabled;
+         break;
       case GL_MODELVIEW_MATRIX:
 	 for (i=0;i<16;i++) {
 	    params[i] = (GLdouble) ctx->ModelView.m[i];
@@ -2449,6 +2461,9 @@ _mesa_GetFloatv( GLenum pname, GLfloat *params )
       case GL_GREEN_SCALE:
          *params = (GLfloat) ctx->Pixel.GreenScale;
          break;
+      case GL_HISTOGRAM:
+         *params = (GLfloat) ctx->Pixel.HistogramEnabled;
+	 break;
       case GL_INDEX_BITS:
          *params = (GLfloat) ctx->Visual->IndexBits;
 	 break;
@@ -2670,6 +2685,9 @@ _mesa_GetFloatv( GLenum pname, GLfloat *params )
          params[0] = (GLfloat) MAX_WIDTH;
          params[1] = (GLfloat) MAX_HEIGHT;
          break;
+      case GL_MINMAX:
+         *params = (GLfloat) ctx->Pixel.MinMaxEnabled;
+         break;
       case GL_MODELVIEW_MATRIX:
 	 for (i=0;i<16;i++) {
 	    params[i] = ctx->ModelView.m[i];
@@ -3483,6 +3501,9 @@ _mesa_GetIntegerv( GLenum pname, GLint *params )
       case GL_GREEN_SCALE:
          *params = (GLint) ctx->Pixel.GreenScale;
          break;
+      case GL_HISTOGRAM:
+         *params = (GLint) ctx->Pixel.HistogramEnabled;
+	 break;
       case GL_INDEX_BITS:
          *params = (GLint) ctx->Visual->IndexBits;
          break;
@@ -3704,6 +3725,9 @@ _mesa_GetIntegerv( GLenum pname, GLint *params )
          params[0] = (GLint) MAX_WIDTH;
          params[1] = (GLint) MAX_HEIGHT;
          break;
+      case GL_MINMAX:
+         *params = (GLint) ctx->Pixel.MinMaxEnabled;
+         break;
       case GL_MODELVIEW_MATRIX:
 	 for (i=0;i<16;i++) {
 	    params[i] = (GLint) ctx->ModelView.m[i];
diff --git a/src/mesa/main/image.c b/src/mesa/main/image.c
index b16f030c76d..23c5b776d81 100644
--- a/src/mesa/main/image.c
+++ b/src/mesa/main/image.c
@@ -1,4 +1,4 @@
-/* $Id: image.c,v 1.29 2000/04/18 14:32:10 brianp Exp $ */
+/* $Id: image.c,v 1.30 2000/05/04 13:48:49 brianp Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -615,7 +615,8 @@ _mesa_pack_rgba_span( GLcontext *ctx,
                         ctx->Pixel.ScaleOrBiasRGBApcm ||
                         ctx->Pixel.ColorTableEnabled ||
                         ctx->Pixel.PostColorMatrixColorTableEnabled ||
-                        ctx->Pixel.MinMaxEnabled);
+                        ctx->Pixel.MinMaxEnabled ||
+                        ctx->Pixel.HistogramEnabled);
 
    /* Test for optimized case first */
    if (!applyTransferOps && format == GL_RGBA && type == GL_UNSIGNED_BYTE) {
@@ -680,10 +681,13 @@ _mesa_pack_rgba_span( GLcontext *ctx,
          if (ctx->Pixel.PostColorMatrixColorTableEnabled) {
             _mesa_lookup_rgba(&ctx->PostColorMatrixColorTable, n, rgba);
          }
-         /* XXX histogram here */
+         /* update histogram count */
+         if (ctx->Pixel.HistogramEnabled) {
+            _mesa_update_histogram(ctx, n, (CONST GLfloat (*)[4]) rgba);
+         }
          /* XXX min/max here */
          if (ctx->Pixel.MinMaxEnabled) {
-            _mesa_update_minmax(ctx, n, (const GLfloat (*)[4]) rgba);
+            _mesa_update_minmax(ctx, n, (CONST GLfloat (*)[4]) rgba);
             if (ctx->MinMax.Sink)
                return;
          }
@@ -2194,7 +2198,8 @@ _mesa_unpack_ubyte_color_span( GLcontext *ctx,
                         ctx->Pixel.ScaleOrBiasRGBApcm ||
                         ctx->Pixel.ColorTableEnabled ||
                         ctx->Pixel.PostColorMatrixColorTableEnabled ||
-                        ctx->Pixel.MinMaxEnabled);
+                        ctx->Pixel.MinMaxEnabled ||
+                        ctx->Pixel.HistogramEnabled);
 
    /* Try simple cases first */
    if (!applyTransferOps && srcType == GL_UNSIGNED_BYTE) {
@@ -2320,10 +2325,13 @@ _mesa_unpack_ubyte_color_span( GLcontext *ctx,
          if (ctx->Pixel.PostColorMatrixColorTableEnabled) {
             _mesa_lookup_rgba(&ctx->PostColorMatrixColorTable, n, rgba);
          }
-         /* XXX histogram here */
+         /* update histogram count */
+         if (ctx->Pixel.HistogramEnabled) {
+            _mesa_update_histogram(ctx, n, (CONST GLfloat (*)[4]) rgba);
+         }
          /* XXX min/max here */
          if (ctx->Pixel.MinMaxEnabled) {
-            _mesa_update_minmax(ctx, n, (const GLfloat (*)[4]) rgba);
+            _mesa_update_minmax(ctx, n, (CONST GLfloat (*)[4]) rgba);
          }
       }
 
@@ -2505,7 +2513,8 @@ _mesa_unpack_float_color_span( GLcontext *ctx,
                         ctx->Pixel.ScaleOrBiasRGBApcm ||
                         ctx->Pixel.ColorTableEnabled ||
                         ctx->Pixel.PostColorMatrixColorTableEnabled ||
-                        ctx->Pixel.MinMaxEnabled);
+                        ctx->Pixel.MinMaxEnabled ||
+                        ctx->Pixel.HistogramEnabled);
 
    /* general solution, no special cases, yet */
    {
@@ -2581,10 +2590,13 @@ _mesa_unpack_float_color_span( GLcontext *ctx,
          if (ctx->Pixel.PostColorMatrixColorTableEnabled) {
             _mesa_lookup_rgba(&ctx->PostColorMatrixColorTable, n, rgba);
          }
-         /* XXX histogram here */
+         /* update histogram count */
+         if (ctx->Pixel.HistogramEnabled) {
+            _mesa_update_histogram(ctx, n, (CONST GLfloat (*)[4]) rgba);
+         }
          /* XXX min/max here */
          if (ctx->Pixel.MinMaxEnabled) {
-            _mesa_update_minmax(ctx, n, (const GLfloat (*)[4]) rgba);
+            _mesa_update_minmax(ctx, n, (CONST GLfloat (*)[4]) rgba);
          }
       }
 
diff --git a/src/mesa/main/state.c b/src/mesa/main/state.c
index fd718372469..595cce83353 100644
--- a/src/mesa/main/state.c
+++ b/src/mesa/main/state.c
@@ -1,4 +1,4 @@
-/* $Id: state.c,v 1.9 2000/04/09 17:08:09 brianp Exp $ */
+/* $Id: state.c,v 1.10 2000/05/04 13:48:49 brianp Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -473,7 +473,6 @@ _mesa_init_exec_table(struct _glapi_table *exec)
    exec->TexImage3D = _mesa_TexImage3D;
    exec->TexSubImage3D = _mesa_TexSubImage3D;
 
-
    /* OpenGL 1.2  GL_ARB_imaging */
    exec->BlendColor = _mesa_BlendColor;
    exec->BlendEquation = _mesa_BlendEquation;
@@ -510,26 +509,33 @@ _mesa_init_exec_table(struct _glapi_table *exec)
    exec->ResetMinmax = _mesa_ResetMinmax;
    exec->SeparableFilter2D = _mesa_SeparableFilter2D;
 
-   /* GL_EXT_texture3d */
+   /* 2. GL_EXT_blend_color */
+#if 0
+   exec->BlendColorEXT = _mesa_BlendColorEXT;
+#endif
+
+   /* 3. GL_EXT_polygon_offset */
+   exec->PolygonOffsetEXT = _mesa_PolygonOffsetEXT;
+
+   /* 6. GL_EXT_texture3d */
 #if 0
    exec->CopyTexSubImage3DEXT = _mesa_CopyTexSubImage3D;
    exec->TexImage3DEXT = _mesa_TexImage3DEXT;
    exec->TexSubImage3DEXT = _mesa_TexSubImage3D;
 #endif
 
-   /* GL_EXT_paletted_texture */
-#if 0
-   exec->ColorTableEXT = _mesa_ColorTableEXT;
-   exec->ColorSubTableEXT = _mesa_ColorSubTableEXT;
-#endif
-   exec->GetColorTableEXT = _mesa_GetColorTable;
-   exec->GetColorTableParameterfvEXT = _mesa_GetColorTableParameterfv;
-   exec->GetColorTableParameterivEXT = _mesa_GetColorTableParameteriv;
+   /* 11. GL_EXT_histogram */
+   exec->GetHistogramEXT = _mesa_GetHistogram;
+   exec->GetHistogramParameterfvEXT = _mesa_GetHistogramParameterfv;
+   exec->GetHistogramParameterivEXT = _mesa_GetHistogramParameteriv;
+   exec->GetMinmaxEXT = _mesa_GetMinmax;
+   exec->GetMinmaxParameterfvEXT = _mesa_GetMinmaxParameterfv;
+   exec->GetMinmaxParameterivEXT = _mesa_GetMinmaxParameteriv;
 
-   /* GL_SGIX_pixel_texture */
+   /* ?. GL_SGIX_pixel_texture */
    exec->PixelTexGenSGIX = _mesa_PixelTexGenSGIX;
 
-   /* GL_SGIS_pixel_texture */
+   /* 15. GL_SGIS_pixel_texture */
    exec->PixelTexGenParameteriSGIS = _mesa_PixelTexGenParameteriSGIS;
    exec->PixelTexGenParameterivSGIS = _mesa_PixelTexGenParameterivSGIS;
    exec->PixelTexGenParameterfSGIS = _mesa_PixelTexGenParameterfSGIS;
@@ -537,31 +543,64 @@ _mesa_init_exec_table(struct _glapi_table *exec)
    exec->GetPixelTexGenParameterivSGIS = _mesa_GetPixelTexGenParameterivSGIS;
    exec->GetPixelTexGenParameterfvSGIS = _mesa_GetPixelTexGenParameterfvSGIS;
 
-   /* GL_EXT_compiled_vertex_array */
-   exec->LockArraysEXT = _mesa_LockArraysEXT;
-   exec->UnlockArraysEXT = _mesa_UnlockArraysEXT;
+   /* 37. GL_EXT_blend_minmax */
+#if 0
+   exec->BlendEquationEXT = _mesa_BlendEquationEXT;
+#endif
 
-   /* GL_EXT_point_parameters */
+   /* 54. GL_EXT_point_parameters */
    exec->PointParameterfEXT = _mesa_PointParameterfEXT;
    exec->PointParameterfvEXT = _mesa_PointParameterfvEXT;
 
-   /* GL_PGI_misc_hints */
+   /* 77. GL_PGI_misc_hints */
    exec->HintPGI = _mesa_HintPGI;
 
-   /* GL_EXT_polygon_offset */
-   exec->PolygonOffsetEXT = _mesa_PolygonOffsetEXT;
-
-   /* GL_EXT_blend_minmax */
+   /* 78. GL_EXT_paletted_texture */
 #if 0
-   exec->BlendEquationEXT = _mesa_BlendEquationEXT;
+   exec->ColorTableEXT = _mesa_ColorTableEXT;
+   exec->ColorSubTableEXT = _mesa_ColorSubTableEXT;
 #endif
+   exec->GetColorTableEXT = _mesa_GetColorTable;
+   exec->GetColorTableParameterfvEXT = _mesa_GetColorTableParameterfv;
+   exec->GetColorTableParameterivEXT = _mesa_GetColorTableParameteriv;
 
-   /* GL_EXT_blend_color */
-#if 0
-   exec->BlendColorEXT = _mesa_BlendColorEXT;
-#endif
+   /* 97. GL_EXT_compiled_vertex_array */
+   exec->LockArraysEXT = _mesa_LockArraysEXT;
+   exec->UnlockArraysEXT = _mesa_UnlockArraysEXT;
+
+   /* 173. GL_INGR_blend_func_separate */
+   exec->BlendFuncSeparateEXT = _mesa_BlendFuncSeparateEXT;
+
+   /* 196. GL_MESA_resize_buffers */
+   exec->ResizeBuffersMESA = _mesa_ResizeBuffersMESA;
+
+   /* 197. GL_MESA_window_pos */
+   exec->WindowPos2dMESA = _mesa_WindowPos2dMESA;
+   exec->WindowPos2dvMESA = _mesa_WindowPos2dvMESA;
+   exec->WindowPos2fMESA = _mesa_WindowPos2fMESA;
+   exec->WindowPos2fvMESA = _mesa_WindowPos2fvMESA;
+   exec->WindowPos2iMESA = _mesa_WindowPos2iMESA;
+   exec->WindowPos2ivMESA = _mesa_WindowPos2ivMESA;
+   exec->WindowPos2sMESA = _mesa_WindowPos2sMESA;
+   exec->WindowPos2svMESA = _mesa_WindowPos2svMESA;
+   exec->WindowPos3dMESA = _mesa_WindowPos3dMESA;
+   exec->WindowPos3dvMESA = _mesa_WindowPos3dvMESA;
+   exec->WindowPos3fMESA = _mesa_WindowPos3fMESA;
+   exec->WindowPos3fvMESA = _mesa_WindowPos3fvMESA;
+   exec->WindowPos3iMESA = _mesa_WindowPos3iMESA;
+   exec->WindowPos3ivMESA = _mesa_WindowPos3ivMESA;
+   exec->WindowPos3sMESA = _mesa_WindowPos3sMESA;
+   exec->WindowPos3svMESA = _mesa_WindowPos3svMESA;
+   exec->WindowPos4dMESA = _mesa_WindowPos4dMESA;
+   exec->WindowPos4dvMESA = _mesa_WindowPos4dvMESA;
+   exec->WindowPos4fMESA = _mesa_WindowPos4fMESA;
+   exec->WindowPos4fvMESA = _mesa_WindowPos4fvMESA;
+   exec->WindowPos4iMESA = _mesa_WindowPos4iMESA;
+   exec->WindowPos4ivMESA = _mesa_WindowPos4ivMESA;
+   exec->WindowPos4sMESA = _mesa_WindowPos4sMESA;
+   exec->WindowPos4svMESA = _mesa_WindowPos4svMESA;
 
-   /* GL_ARB_multitexture */
+   /* ARB 1. GL_ARB_multitexture */
    exec->ActiveTextureARB = _mesa_ActiveTextureARB;
    exec->ClientActiveTextureARB = _mesa_ClientActiveTextureARB;
    exec->MultiTexCoord1dARB = _mesa_MultiTexCoord1dARB;
@@ -597,39 +636,7 @@ _mesa_init_exec_table(struct _glapi_table *exec)
    exec->MultiTexCoord4sARB = _mesa_MultiTexCoord4sARB;
    exec->MultiTexCoord4svARB = _mesa_MultiTexCoord4svARB;
 
-   /* GL_INGR_blend_func_separate */
-   exec->BlendFuncSeparateEXT = _mesa_BlendFuncSeparateEXT;
-
-   /* GL_MESA_window_pos */
-   exec->WindowPos2dMESA = _mesa_WindowPos2dMESA;
-   exec->WindowPos2dvMESA = _mesa_WindowPos2dvMESA;
-   exec->WindowPos2fMESA = _mesa_WindowPos2fMESA;
-   exec->WindowPos2fvMESA = _mesa_WindowPos2fvMESA;
-   exec->WindowPos2iMESA = _mesa_WindowPos2iMESA;
-   exec->WindowPos2ivMESA = _mesa_WindowPos2ivMESA;
-   exec->WindowPos2sMESA = _mesa_WindowPos2sMESA;
-   exec->WindowPos2svMESA = _mesa_WindowPos2svMESA;
-   exec->WindowPos3dMESA = _mesa_WindowPos3dMESA;
-   exec->WindowPos3dvMESA = _mesa_WindowPos3dvMESA;
-   exec->WindowPos3fMESA = _mesa_WindowPos3fMESA;
-   exec->WindowPos3fvMESA = _mesa_WindowPos3fvMESA;
-   exec->WindowPos3iMESA = _mesa_WindowPos3iMESA;
-   exec->WindowPos3ivMESA = _mesa_WindowPos3ivMESA;
-   exec->WindowPos3sMESA = _mesa_WindowPos3sMESA;
-   exec->WindowPos3svMESA = _mesa_WindowPos3svMESA;
-   exec->WindowPos4dMESA = _mesa_WindowPos4dMESA;
-   exec->WindowPos4dvMESA = _mesa_WindowPos4dvMESA;
-   exec->WindowPos4fMESA = _mesa_WindowPos4fMESA;
-   exec->WindowPos4fvMESA = _mesa_WindowPos4fvMESA;
-   exec->WindowPos4iMESA = _mesa_WindowPos4iMESA;
-   exec->WindowPos4ivMESA = _mesa_WindowPos4ivMESA;
-   exec->WindowPos4sMESA = _mesa_WindowPos4sMESA;
-   exec->WindowPos4svMESA = _mesa_WindowPos4svMESA;
-
-   /* GL_MESA_resize_buffers */
-   exec->ResizeBuffersMESA = _mesa_ResizeBuffersMESA;
-
-   /* GL_ARB_transpose_matrix */
+   /* ARB 3. GL_ARB_transpose_matrix */
    exec->LoadTransposeMatrixdARB = _mesa_LoadTransposeMatrixdARB;
    exec->LoadTransposeMatrixfARB = _mesa_LoadTransposeMatrixfARB;
    exec->MultTransposeMatrixdARB = _mesa_MultTransposeMatrixdARB;