added GL_SGI_color_matrix extension

10 files changed, 321 insertions, 47 deletions

diff --git a/src/mesa/main/config.h b/src/mesa/main/config.h
index ffafd3e78d6..a27af641a35 100644
--- a/src/mesa/main/config.h
+++ b/src/mesa/main/config.h
@@ -1,4 +1,4 @@
-/* $Id: config.h,v 1.9 2000/04/07 00:19:41 brianp Exp $ */
+/* $Id: config.h,v 1.10 2000/04/08 18:57:45 brianp Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -52,6 +52,9 @@
 /* Maximum texture matrix stack depth: */
 #define MAX_TEXTURE_STACK_DEPTH 10
 
+/* Maximum color matrix stack depth: */
+#define MAX_COLOR_STACK_DEPTH 4
+
 /* Maximum attribute stack depth: */
 #define MAX_ATTRIB_STACK_DEPTH 16
 
diff --git a/src/mesa/main/context.c b/src/mesa/main/context.c
index 8c2be5d497e..dfcff91cc29 100644
--- a/src/mesa/main/context.c
+++ b/src/mesa/main/context.c
@@ -1,4 +1,4 @@
-/* $Id: context.c,v 1.55 2000/04/07 16:27:26 brianp Exp $ */
+/* $Id: context.c,v 1.56 2000/04/08 18:57:45 brianp Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -853,6 +853,13 @@ static void init_attrib_groups( GLcontext *ctx )
       }
    }
 
+   /* Color matrix */
+   gl_matrix_ctr(&ctx->ColorMatrix);
+   ctx->ColorStackDepth = 0;
+   for (j = 0; j < MAX_COLOR_STACK_DEPTH - 1; j++) {
+      gl_matrix_ctr(&ctx->ColorStack[j]);
+   }
+
    /* Accumulate buffer group */
    ASSIGN_4V( ctx->Accum.ClearColor, 0.0, 0.0, 0.0, 0.0 );
 
@@ -1120,6 +1127,14 @@ static void init_attrib_groups( GLcontext *ctx )
    ctx->Pixel.PixelTextureEnabled = GL_FALSE;
    ctx->Pixel.FragmentRgbSource = GL_PIXEL_GROUP_COLOR_SGIS;
    ctx->Pixel.FragmentAlphaSource = GL_PIXEL_GROUP_COLOR_SGIS;
+   ctx->Pixel.PostColorMatrixRedBias = 0.0;
+   ctx->Pixel.PostColorMatrixRedScale = 1.0;
+   ctx->Pixel.PostColorMatrixGreenBias = 0.0;
+   ctx->Pixel.PostColorMatrixGreenScale = 1.0;
+   ctx->Pixel.PostColorMatrixBlueBias = 0.0;
+   ctx->Pixel.PostColorMatrixBlueScale = 1.0;
+   ctx->Pixel.PostColorMatrixAlphaBias = 0.0;
+   ctx->Pixel.PostColorMatrixAlphaScale = 1.0;
 
    /* Point group */
    ctx->Point.SmoothFlag = GL_FALSE;
diff --git a/src/mesa/main/drawpix.c b/src/mesa/main/drawpix.c
index 23479bf321f..ad9ce929f10 100644
--- a/src/mesa/main/drawpix.c
+++ b/src/mesa/main/drawpix.c
@@ -1,4 +1,4 @@
-/* $Id: drawpix.c,v 1.17 2000/04/07 16:27:26 brianp Exp $ */
+/* $Id: drawpix.c,v 1.18 2000/04/08 18:57:45 brianp Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -116,15 +116,10 @@ simple_DrawPixels( GLcontext *ctx, GLint x, GLint y,
       return GL_TRUE;
    }
 
-   if (ctx->NewState) {
-      gl_update_state(ctx);
-   }
-
    if ((ctx->RasterMask&(~(SCISSOR_BIT|WINCLIP_BIT)))==0
-       && ctx->Pixel.RedBias==0.0 && ctx->Pixel.RedScale==1.0
-       && ctx->Pixel.GreenBias==0.0 && ctx->Pixel.GreenScale==1.0
-       && ctx->Pixel.BlueBias==0.0 && ctx->Pixel.BlueScale==1.0
-       && ctx->Pixel.AlphaBias==0.0 && ctx->Pixel.AlphaScale==1.0
+       && !ctx->Pixel.ScaleOrBiasRGBA
+       && !ctx->Pixel.ScaleOrBiasRGBApcm
+       && ctx->ColorMatrix.type == MATRIX_IDENTITY
        && ctx->Pixel.IndexShift==0 && ctx->Pixel.IndexOffset==0
        && ctx->Pixel.MapColorFlag==0
        && ctx->Texture.ReallyEnabled == 0
@@ -692,6 +687,10 @@ _mesa_DrawPixels( GLsizei width, GLsizei height,
 	 return;
       }
 
+      if (ctx->NewState) {
+         gl_update_state(ctx);
+      }
+
       x = (GLint) (ctx->Current.RasterPos[0] + 0.5F);
       y = (GLint) (ctx->Current.RasterPos[1] + 0.5F);
 
diff --git a/src/mesa/main/extensions.c b/src/mesa/main/extensions.c
index d0a30eed370..b2085246f76 100644
--- a/src/mesa/main/extensions.c
+++ b/src/mesa/main/extensions.c
@@ -1,4 +1,4 @@
-/* $Id: extensions.c,v 1.22 2000/04/07 16:27:26 brianp Exp $ */
+/* $Id: extensions.c,v 1.23 2000/04/08 18:57:45 brianp Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -49,37 +49,38 @@ struct extension {
 
 
 static struct { int enabled; const char *name; } default_extensions[] = {
+   { DEFAULT_OFF,    "GL_ARB_imaging" },
+   { DEFAULT_ON,     "GL_ARB_multitexture" },
+   { ALWAYS_ENABLED, "GL_ARB_tranpose_matrix" },
+   { ALWAYS_ENABLED, "GL_EXT_abgr" },
    { DEFAULT_ON,     "GL_EXT_blend_color" },
-   { DEFAULT_OFF,    "ARB_imaging" },
-   { DEFAULT_ON,     "GL_EXT_blend_minmax" },
    { DEFAULT_ON,     "GL_EXT_blend_logic_op" },
+   { DEFAULT_ON,     "GL_EXT_blend_minmax" },
    { DEFAULT_ON,     "GL_EXT_blend_subtract" },
+   { DEFAULT_ON,     "GL_EXT_clip_volume_hint" },
+   { DEFAULT_ON,     "GL_EXT_compiled_vertex_array" },
    { DEFAULT_ON,     "GL_EXT_paletted_texture" },
    { DEFAULT_ON,     "GL_EXT_point_parameters" },
    { ALWAYS_ENABLED, "GL_EXT_polygon_offset" },
-   { ALWAYS_ENABLED, "GL_EXT_vertex_array" },
-   { ALWAYS_ENABLED, "GL_EXT_texture_object" },
-   { DEFAULT_ON,     "GL_EXT_texture3D" },
-   { ALWAYS_ENABLED, "GL_MESA_window_pos" },
-   { ALWAYS_ENABLED, "GL_MESA_resize_buffers" },
-   { DEFAULT_ON,     "GL_EXT_shared_texture_palette" },
    { ALWAYS_ENABLED, "GL_EXT_rescale_normal" },
-   { ALWAYS_ENABLED, "GL_EXT_abgr" },
-   { ALWAYS_ENABLED, "GL_SGIS_texture_edge_clamp" },
+   { DEFAULT_ON,     "GL_EXT_shared_texture_palette" },
    { ALWAYS_ENABLED, "GL_EXT_stencil_wrap" },
-   { DEFAULT_ON,     "GL_INGR_blend_func_separate" },
-   { DEFAULT_ON,     "GL_ARB_multitexture" },
-   { ALWAYS_ENABLED, "GL_NV_texgen_reflection" },
-   { DEFAULT_ON,     "GL_PGI_misc_hints" },
-   { DEFAULT_ON,     "GL_EXT_compiled_vertex_array" },
-   { DEFAULT_ON,     "GL_EXT_clip_volume_hint" },
-   { DEFAULT_ON,     "GL_EXT_texture_env_add" },
-   { ALWAYS_ENABLED, "GL_ARB_tranpose_matrix" },
-   { DEFAULT_OFF,    "GL_EXT_vertex_array_set" },
+   { DEFAULT_ON,     "GL_EXT_texture3D" },
    { DEFAULT_OFF,    "GL_EXT_texture_env" },
+   { DEFAULT_ON,     "GL_EXT_texture_env_add" },
+   { ALWAYS_ENABLED, "GL_EXT_texture_object" },
    { DEFAULT_ON,     "GL_EXT_texture_lod_bias" },
+   { ALWAYS_ENABLED, "GL_EXT_vertex_array" },
+   { DEFAULT_OFF,    "GL_EXT_vertex_array_set" },
    { DEFAULT_OFF,    "GL_HP_occlusion_test" },
+   { DEFAULT_ON,     "GL_INGR_blend_func_separate" },
+   { ALWAYS_ENABLED, "GL_MESA_window_pos" },
+   { ALWAYS_ENABLED, "GL_MESA_resize_buffers" },
+   { ALWAYS_ENABLED, "GL_NV_texgen_reflection" },
+   { DEFAULT_ON,     "GL_PGI_misc_hints" },
+   { DEFAULT_ON,     "GL_SGI_color_matrix" },
    { DEFAULT_ON,     "GL_SGIS_pixel_texture" },
+   { DEFAULT_ON,     "GL_SGIS_texture_edge_clamp" },
    { DEFAULT_ON,     "GL_SGIX_pixel_texture" }
 };
 
diff --git a/src/mesa/main/get.c b/src/mesa/main/get.c
index de7b108df84..ec4f39fe2aa 100644
--- a/src/mesa/main/get.c
+++ b/src/mesa/main/get.c
@@ -1,4 +1,4 @@
-/* $Id: get.c,v 1.18 2000/04/07 16:27:26 brianp Exp $ */
+/* $Id: get.c,v 1.19 2000/04/08 18:57:45 brianp Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -1077,6 +1077,43 @@ _mesa_GetBooleanv( GLenum pname, GLboolean *params )
          *params = (GLboolean) pixel_texgen_mode(ctx);
          break;
 
+      /* GL_SGI_color_matrix (also in 1.2 imaging) */
+      case GL_COLOR_MATRIX_SGI:
+         for (i=0;i<16;i++) {
+	    params[i] = FLOAT_TO_BOOL(ctx->ColorMatrix.m[i]);
+	 }
+	 break;
+      case GL_COLOR_MATRIX_STACK_DEPTH_SGI:
+         *params = INT_TO_BOOL(ctx->ColorStackDepth + 1);
+         break;
+      case GL_MAX_COLOR_MATRIX_STACK_DEPTH_SGI:
+         *params = FLOAT_TO_BOOL(MAX_COLOR_STACK_DEPTH);
+         break;
+      case GL_POST_COLOR_MATRIX_RED_SCALE_SGI:
+         *params = FLOAT_TO_BOOL(ctx->Pixel.PostColorMatrixRedScale);
+         break;
+      case GL_POST_COLOR_MATRIX_GREEN_SCALE_SGI:
+         *params = FLOAT_TO_BOOL(ctx->Pixel.PostColorMatrixGreenScale);
+         break;
+      case GL_POST_COLOR_MATRIX_BLUE_SCALE_SGI:
+         *params = FLOAT_TO_BOOL(ctx->Pixel.PostColorMatrixBlueScale);
+         break;
+      case GL_POST_COLOR_MATRIX_ALPHA_SCALE_SGI:
+         *params = FLOAT_TO_BOOL(ctx->Pixel.PostColorMatrixAlphaScale);
+         break;
+      case GL_POST_COLOR_MATRIX_RED_BIAS_SGI:
+         *params = FLOAT_TO_BOOL(ctx->Pixel.PostColorMatrixRedBias);
+         break;
+      case GL_POST_COLOR_MATRIX_GREEN_BIAS_SGI:
+         *params = FLOAT_TO_BOOL(ctx->Pixel.PostColorMatrixGreenBias);
+         break;
+      case GL_POST_COLOR_MATRIX_BLUE_BIAS_SGI:
+         *params = FLOAT_TO_BOOL(ctx->Pixel.PostColorMatrixBlueBias);
+         break;
+      case GL_POST_COLOR_MATRIX_ALPHA_BIAS_SGI:
+         *params = FLOAT_TO_BOOL(ctx->Pixel.PostColorMatrixAlphaBias);
+         break;
+
       default:
          gl_error( ctx, GL_INVALID_ENUM, "glGetBooleanv" );
    }
@@ -2082,6 +2119,43 @@ _mesa_GetDoublev( GLenum pname, GLdouble *params )
          *params = (GLdouble) pixel_texgen_mode(ctx);
          break;
 
+      /* GL_SGI_color_matrix (also in 1.2 imaging) */
+      case GL_COLOR_MATRIX_SGI:
+         for (i=0;i<16;i++) {
+	    params[i] = (GLdouble) ctx->ColorMatrix.m[i];
+	 }
+	 break;
+      case GL_COLOR_MATRIX_STACK_DEPTH_SGI:
+         *params = (GLdouble) (ctx->ColorStackDepth + 1);
+         break;
+      case GL_MAX_COLOR_MATRIX_STACK_DEPTH_SGI:
+         *params = (GLdouble) MAX_COLOR_STACK_DEPTH;
+         break;
+      case GL_POST_COLOR_MATRIX_RED_SCALE_SGI:
+         *params = (GLdouble) ctx->Pixel.PostColorMatrixRedScale;
+         break;
+      case GL_POST_COLOR_MATRIX_GREEN_SCALE_SGI:
+         *params = (GLdouble) ctx->Pixel.PostColorMatrixGreenScale;
+         break;
+      case GL_POST_COLOR_MATRIX_BLUE_SCALE_SGI:
+         *params = (GLdouble) ctx->Pixel.PostColorMatrixBlueScale;
+         break;
+      case GL_POST_COLOR_MATRIX_ALPHA_SCALE_SGI:
+         *params = (GLdouble) ctx->Pixel.PostColorMatrixAlphaScale;
+         break;
+      case GL_POST_COLOR_MATRIX_RED_BIAS_SGI:
+         *params = (GLdouble) ctx->Pixel.PostColorMatrixRedBias;
+         break;
+      case GL_POST_COLOR_MATRIX_GREEN_BIAS_SGI:
+         *params = (GLdouble) ctx->Pixel.PostColorMatrixGreenBias;
+         break;
+      case GL_POST_COLOR_MATRIX_BLUE_BIAS_SGI:
+         *params = (GLdouble) ctx->Pixel.PostColorMatrixBlueBias;
+         break;
+      case GL_POST_COLOR_MATRIX_ALPHA_BIAS_SGI:
+         *params = (GLdouble) ctx->Pixel.PostColorMatrixAlphaBias;
+         break;
+
       default:
          gl_error( ctx, GL_INVALID_ENUM, "glGetDoublev" );
    }
@@ -3064,6 +3138,43 @@ _mesa_GetFloatv( GLenum pname, GLfloat *params )
          *params = (GLfloat) pixel_texgen_mode(ctx);
          break;
 
+      /* GL_SGI_color_matrix (also in 1.2 imaging) */
+      case GL_COLOR_MATRIX_SGI:
+         for (i=0;i<16;i++) {
+	    params[i] = ctx->ColorMatrix.m[i];
+	 }
+	 break;
+      case GL_COLOR_MATRIX_STACK_DEPTH_SGI:
+         *params = (GLfloat) (ctx->ColorStackDepth + 1);
+         break;
+      case GL_MAX_COLOR_MATRIX_STACK_DEPTH_SGI:
+         *params = (GLfloat) MAX_COLOR_STACK_DEPTH;
+         break;
+      case GL_POST_COLOR_MATRIX_RED_SCALE_SGI:
+         *params = ctx->Pixel.PostColorMatrixRedScale;
+         break;
+      case GL_POST_COLOR_MATRIX_GREEN_SCALE_SGI:
+         *params = ctx->Pixel.PostColorMatrixGreenScale;
+         break;
+      case GL_POST_COLOR_MATRIX_BLUE_SCALE_SGI:
+         *params = ctx->Pixel.PostColorMatrixBlueScale;
+         break;
+      case GL_POST_COLOR_MATRIX_ALPHA_SCALE_SGI:
+         *params = ctx->Pixel.PostColorMatrixAlphaScale;
+         break;
+      case GL_POST_COLOR_MATRIX_RED_BIAS_SGI:
+         *params = ctx->Pixel.PostColorMatrixRedBias;
+         break;
+      case GL_POST_COLOR_MATRIX_GREEN_BIAS_SGI:
+         *params = ctx->Pixel.PostColorMatrixGreenBias;
+         break;
+      case GL_POST_COLOR_MATRIX_BLUE_BIAS_SGI:
+         *params = ctx->Pixel.PostColorMatrixBlueBias;
+         break;
+      case GL_POST_COLOR_MATRIX_ALPHA_BIAS_SGI:
+         *params = ctx->Pixel.PostColorMatrixAlphaBias;
+         break;
+
       default:
          gl_error( ctx, GL_INVALID_ENUM, "glGetFloatv" );
    }
@@ -4069,6 +4180,43 @@ _mesa_GetIntegerv( GLenum pname, GLint *params )
          *params = (GLint) pixel_texgen_mode(ctx);
          break;
 
+      /* GL_SGI_color_matrix (also in 1.2 imaging) */
+      case GL_COLOR_MATRIX_SGI:
+         for (i=0;i<16;i++) {
+	    params[i] = (GLint) ctx->ColorMatrix.m[i];
+	 }
+	 break;
+      case GL_COLOR_MATRIX_STACK_DEPTH_SGI:
+         *params = ctx->ColorStackDepth + 1;
+         break;
+      case GL_MAX_COLOR_MATRIX_STACK_DEPTH_SGI:
+         *params = MAX_COLOR_STACK_DEPTH;
+         break;
+      case GL_POST_COLOR_MATRIX_RED_SCALE_SGI:
+         *params = (GLint) ctx->Pixel.PostColorMatrixRedScale;
+         break;
+      case GL_POST_COLOR_MATRIX_GREEN_SCALE_SGI:
+         *params = (GLint) ctx->Pixel.PostColorMatrixGreenScale;
+         break;
+      case GL_POST_COLOR_MATRIX_BLUE_SCALE_SGI:
+         *params = (GLint) ctx->Pixel.PostColorMatrixBlueScale;
+         break;
+      case GL_POST_COLOR_MATRIX_ALPHA_SCALE_SGI:
+         *params = (GLint) ctx->Pixel.PostColorMatrixAlphaScale;
+         break;
+      case GL_POST_COLOR_MATRIX_RED_BIAS_SGI:
+         *params = (GLint) ctx->Pixel.PostColorMatrixRedBias;
+         break;
+      case GL_POST_COLOR_MATRIX_GREEN_BIAS_SGI:
+         *params = (GLint) ctx->Pixel.PostColorMatrixGreenBias;
+         break;
+      case GL_POST_COLOR_MATRIX_BLUE_BIAS_SGI:
+         *params = (GLint) ctx->Pixel.PostColorMatrixBlueBias;
+         break;
+      case GL_POST_COLOR_MATRIX_ALPHA_BIAS_SGI:
+         *params = (GLint) ctx->Pixel.PostColorMatrixAlphaBias;
+         break;
+
       default:
          gl_error( ctx, GL_INVALID_ENUM, "glGetIntegerv" );
    }
diff --git a/src/mesa/main/image.c b/src/mesa/main/image.c
index e0879be5e3e..28720be9f65 100644
--- a/src/mesa/main/image.c
+++ b/src/mesa/main/image.c
@@ -1,4 +1,4 @@
-/* $Id: image.c,v 1.24 2000/03/29 15:56:53 brianp Exp $ */
+/* $Id: image.c,v 1.25 2000/04/08 18:57:45 brianp Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -2154,12 +2154,13 @@ _mesa_unpack_ubyte_color_span( const GLcontext *ctx,
           srcType == GL_UNSIGNED_INT_10_10_10_2 ||
           srcType == GL_UNSIGNED_INT_2_10_10_10_REV);
 
-   /* this is intended for RGBA mode */
+   /* this is intended for RGBA mode only */
    assert(ctx->Visual->RGBAflag);
 
    applyTransferOps &= (ctx->Pixel.ScaleOrBiasRGBA ||
                         ctx->Pixel.MapColorFlag ||
-                        ctx->Pixel.MapColorFlag);
+                        ctx->ColorMatrix.type != MATRIX_IDENTITY ||
+                        ctx->Pixel.ScaleOrBiasRGBApcm);
 
    /* Try simple cases first */
    if (!applyTransferOps && srcType == GL_UNSIGNED_BYTE) {
@@ -2265,11 +2266,16 @@ _mesa_unpack_ubyte_color_span( const GLcontext *ctx,
 
          if (applyTransferOps) {
             /* scale and bias colors */
-            gl_scale_and_bias_rgba_float(ctx, n, rgba);
+            _mesa_scale_and_bias_rgba_float(ctx, n, rgba);
 
             /* color table lookup */
             if (ctx->Pixel.MapColorFlag) {
-               gl_map_rgba_float(ctx, n, rgba);
+               _mesa_map_rgba_float(ctx, n, rgba);
+            }
+
+            if (ctx->ColorMatrix.type != MATRIX_IDENTITY ||
+                ctx->Pixel.ScaleOrBiasRGBApcm) {
+               _mesa_transform_rgba(ctx, n, rgba);
             }
          }
       }
diff --git a/src/mesa/main/matrix.c b/src/mesa/main/matrix.c
index c8f25c0cd5a..5eb5bb43f0c 100644
--- a/src/mesa/main/matrix.c
+++ b/src/mesa/main/matrix.c
@@ -1,4 +1,4 @@
-/* $Id: matrix.c,v 1.16 2000/03/03 17:47:39 brianp Exp $ */
+/* $Id: matrix.c,v 1.17 2000/04/08 18:57:45 brianp Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -931,6 +931,10 @@ do {									\
 	 mat = &ctx->TextureMatrix[ctx->Texture.CurrentTransformUnit];	\
 	 flags |= NEW_TEXTURE_MATRIX;					\
 	 break;								\
+      case GL_COLOR:							\
+	 mat = &ctx->ColorMatrix;					\
+	 flags |= NEW_COLOR_MATRIX;					\
+	 break;								\
       default:								\
          gl_problem(ctx, where);					\
    }									\
@@ -1037,6 +1041,7 @@ _mesa_MatrixMode( GLenum mode )
       case GL_MODELVIEW:
       case GL_PROJECTION:
       case GL_TEXTURE:
+      case GL_COLOR:
          ctx->Transform.MatrixMode = mode;
          break;
       default:
@@ -1090,6 +1095,14 @@ _mesa_PushMatrix( void )
 			    &ctx->TextureMatrix[t] );
          }
          break;
+      case GL_COLOR:
+         if (ctx->ColorStackDepth >= MAX_COLOR_STACK_DEPTH - 1) {
+            gl_error( ctx,  GL_STACK_OVERFLOW, "glPushMatrix");
+            return;
+         }
+         gl_matrix_copy( &ctx->ColorStack[ctx->ColorStackDepth++],
+                         &ctx->ColorMatrix );
+         break;
       default:
          gl_problem(ctx, "Bad matrix mode in gl_PushMatrix");
    }
@@ -1147,6 +1160,14 @@ _mesa_PopMatrix( void )
 			   &ctx->TextureStack[t][--ctx->TextureStackDepth[t]]);
          }
          break;
+      case GL_COLOR:
+         if (ctx->ColorStackDepth==0) {
+            gl_error( ctx,  GL_STACK_UNDERFLOW, "glPopMatrix");
+            return;
+         }
+         gl_matrix_copy(&ctx->ColorMatrix,
+                        &ctx->ColorStack[--ctx->ColorStackDepth]);
+         break;
       default:
          gl_problem(ctx, "Bad matrix mode in gl_PopMatrix");
    }
diff --git a/src/mesa/main/pixel.c b/src/mesa/main/pixel.c
index 1651fe1190c..213aa2c8944 100644
--- a/src/mesa/main/pixel.c
+++ b/src/mesa/main/pixel.c
@@ -1,4 +1,4 @@
-/* $Id: pixel.c,v 1.5 1999/11/11 01:22:27 brianp Exp $ */
+/* $Id: pixel.c,v 1.6 2000/04/08 18:57:45 brianp Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -562,6 +562,30 @@ _mesa_PixelTransferf( GLenum pname, GLfloat param )
       case GL_DEPTH_BIAS:
          ctx->Pixel.DepthBias = param;
 	 break;
+      case GL_POST_COLOR_MATRIX_RED_SCALE:
+         ctx->Pixel.PostColorMatrixRedScale = param;
+	 break;
+      case GL_POST_COLOR_MATRIX_RED_BIAS:
+         ctx->Pixel.PostColorMatrixRedBias = param;
+	 break;
+      case GL_POST_COLOR_MATRIX_GREEN_SCALE:
+         ctx->Pixel.PostColorMatrixGreenScale = param;
+	 break;
+      case GL_POST_COLOR_MATRIX_GREEN_BIAS:
+         ctx->Pixel.PostColorMatrixGreenBias = param;
+	 break;
+      case GL_POST_COLOR_MATRIX_BLUE_SCALE:
+         ctx->Pixel.PostColorMatrixBlueScale = param;
+	 break;
+      case GL_POST_COLOR_MATRIX_BLUE_BIAS:
+         ctx->Pixel.PostColorMatrixBlueBias = param;
+	 break;
+      case GL_POST_COLOR_MATRIX_ALPHA_SCALE:
+         ctx->Pixel.PostColorMatrixAlphaScale = param;
+	 break;
+      case GL_POST_COLOR_MATRIX_ALPHA_BIAS:
+         ctx->Pixel.PostColorMatrixAlphaBias = param;
+	 break;
       default:
          gl_error( ctx, GL_INVALID_ENUM, "glPixelTransfer(pname)" );
          return;
@@ -576,6 +600,20 @@ _mesa_PixelTransferf( GLenum pname, GLfloat param )
    else {
       ctx->Pixel.ScaleOrBiasRGBA = GL_FALSE;
    }
+
+   if (ctx->Pixel.PostColorMatrixRedScale!=1.0F   ||
+       ctx->Pixel.PostColorMatrixRedBias!=0.0F    ||
+       ctx->Pixel.PostColorMatrixGreenScale!=1.0F ||
+       ctx->Pixel.PostColorMatrixGreenBias!=0.0F  ||
+       ctx->Pixel.PostColorMatrixBlueScale!=1.0F  ||
+       ctx->Pixel.PostColorMatrixBlueBias!=0.0F   ||
+       ctx->Pixel.PostColorMatrixAlphaScale!=1.0F ||
+       ctx->Pixel.PostColorMatrixAlphaBias!=0.0F) {
+      ctx->Pixel.ScaleOrBiasRGBApcm = GL_TRUE;
+   }
+   else {
+      ctx->Pixel.ScaleOrBiasRGBApcm = GL_FALSE;
+   }
 }
 
 
@@ -640,7 +678,9 @@ void gl_scale_and_bias_rgba( const GLcontext *ctx, GLuint n, GLubyte rgba[][4] )
 /*
  * Apply scale and bias factors to an array of RGBA pixels.
  */
-void gl_scale_and_bias_rgba_float( const GLcontext *ctx, GLuint n, GLfloat rgba[][4] )
+void
+_mesa_scale_and_bias_rgba_float(const GLcontext *ctx, GLuint n,
+                                GLfloat rgba[][4])
 {
    if (ctx->Pixel.RedScale != 1.0 || ctx->Pixel.RedBias != 0.0) {
       const GLfloat scale = ctx->Pixel.RedScale;
@@ -703,7 +743,8 @@ void gl_map_rgba( const GLcontext *ctx, GLuint n, GLubyte rgba[][4] )
 /*
  * Apply pixel mapping to an array of floating point RGBA pixels.
  */
-void gl_map_rgba_float( const GLcontext *ctx, GLuint n, GLfloat rgba[][4] )
+void
+_mesa_map_rgba_float( const GLcontext *ctx, GLuint n, GLfloat rgba[][4] )
 {
    const GLfloat rscale = ctx->Pixel.MapRtoRsize - 1;
    const GLfloat gscale = ctx->Pixel.MapGtoGsize - 1;
@@ -724,6 +765,36 @@ void gl_map_rgba_float( const GLcontext *ctx, GLuint n, GLfloat rgba[][4] )
 
 
 /*
+ * Apply the color matrix and post color matrix scaling and biasing.
+ */
+void
+_mesa_transform_rgba(const GLcontext *ctx, GLuint n, GLfloat rgba[][4])
+{
+   const GLfloat rs = ctx->Pixel.PostColorMatrixRedScale;
+   const GLfloat rb = ctx->Pixel.PostColorMatrixRedBias;
+   const GLfloat gs = ctx->Pixel.PostColorMatrixGreenScale;
+   const GLfloat gb = ctx->Pixel.PostColorMatrixGreenBias;
+   const GLfloat bs = ctx->Pixel.PostColorMatrixBlueScale;
+   const GLfloat bb = ctx->Pixel.PostColorMatrixBlueBias;
+   const GLfloat as = ctx->Pixel.PostColorMatrixAlphaScale;
+   const GLfloat ab = ctx->Pixel.PostColorMatrixAlphaBias;
+   const GLfloat *m = ctx->ColorMatrix.m;
+   GLuint i;
+   for (i = 0; i < n; i++) {
+      const GLfloat r = rgba[i][RCOMP];
+      const GLfloat g = rgba[i][GCOMP];
+      const GLfloat b = rgba[i][BCOMP];
+      const GLfloat a = rgba[i][ACOMP];
+      rgba[i][RCOMP] = (m[0] * r + m[4] * g + m[ 8] * b + m[12] * a) * rs + rb;
+      rgba[i][GCOMP] = (m[1] * r + m[5] * g + m[ 9] * b + m[13] * a) * gs + gb;
+      rgba[i][BCOMP] = (m[2] * r + m[6] * g + m[10] * b + m[14] * a) * bs + bb;
+      rgba[i][ACOMP] = (m[3] * r + m[7] * g + m[11] * b + m[15] * a) * as + ab;
+   }
+}
+
+
+
+/*
  * Apply pixel mapping to an array of RGBA pixels.
  */
 void gl_map_color( const GLcontext *ctx, GLuint n,
diff --git a/src/mesa/main/pixel.h b/src/mesa/main/pixel.h
index 841c98258f0..b40af4929f6 100644
--- a/src/mesa/main/pixel.h
+++ b/src/mesa/main/pixel.h
@@ -1,4 +1,4 @@
-/* $Id: pixel.h,v 1.3 1999/11/11 01:22:27 brianp Exp $ */
+/* $Id: pixel.h,v 1.4 2000/04/08 18:57:45 brianp Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -85,15 +85,20 @@ extern void gl_scale_and_bias_rgba( const GLcontext *ctx, GLuint n,
                                     GLubyte rgba[][4] );
 
 
-extern void gl_scale_and_bias_rgba_float( const GLcontext *ctx, GLuint n,
-                                          GLfloat rgba[][4] );
+extern void
+_mesa_scale_and_bias_rgba_float( const GLcontext *ctx, GLuint n,
+                                 GLfloat rgba[][4] );
 
 
 extern void gl_map_rgba( const GLcontext *ctx, GLuint n, GLubyte rgba[][4] );
 
 
-extern void gl_map_rgba_float( const GLcontext *ctx, GLuint n,
-                               GLfloat rgba[][4] );
+extern void
+_mesa_map_rgba_float( const GLcontext *ctx, GLuint n, GLfloat rgba[][4] );
+
+
+extern void
+_mesa_transform_rgba(const GLcontext *ctx, GLuint n, GLfloat rgba[][4]);
 
 
 extern void gl_map_color( const GLcontext *ctx, GLuint n,
diff --git a/src/mesa/main/state.c b/src/mesa/main/state.c
index 990cd4d31c4..4f59d3d1095 100644
--- a/src/mesa/main/state.c
+++ b/src/mesa/main/state.c
@@ -1,4 +1,4 @@
-/* $Id: state.c,v 1.7 2000/04/07 16:27:26 brianp Exp $ */
+/* $Id: state.c,v 1.8 2000/04/08 18:57:45 brianp Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -1148,6 +1148,11 @@ void gl_update_state( GLcontext *ctx )
       ctx->ModelProjectWinMatrixUptodate = 0;
    }
 
+   if (ctx->NewState & NEW_COLOR_MATRIX) {
+      gl_matrix_analyze( &ctx->ColorMatrix );
+      printf("analyze color matrix %x %x\n", ctx->ColorMatrix.flags, ctx->ColorMatrix.type);
+   }
+
    /* Figure out whether we can light in object space or not.  If we
     * can, find the current positions of the lights in object space
     */