mesa: implement per-buffer color masking

This is part of the GL_EXT_draw_buffers2 extension and part of GL 3.0.

The ctx->Color.ColorMask field is now a 2-D array.  Until drivers are
modified to support per-buffer color masking, they can just look at
the 0th color mask.

The new _mesa_ColorMaskIndexed() function will be called by
glColorMaskIndexedEXT() or glColorMaski().

27 files changed, 146 insertions, 121 deletions

diff --git a/src/mesa/drivers/common/driverfuncs.c b/src/mesa/drivers/common/driverfuncs.c
index 9b271f85e92..5c5e17820d6 100644
--- a/src/mesa/drivers/common/driverfuncs.c
+++ b/src/mesa/drivers/common/driverfuncs.c
@@ -264,11 +264,23 @@ _mesa_init_driver_state(GLcontext *ctx)
                                  ctx->Color.BlendDstRGB,
                                  ctx->Color.BlendSrcA, ctx->Color.BlendDstA);
 
-   ctx->Driver.ColorMask(ctx,
-                         ctx->Color.ColorMask[RCOMP],
-                         ctx->Color.ColorMask[GCOMP],
-                         ctx->Color.ColorMask[BCOMP],
-                         ctx->Color.ColorMask[ACOMP]);
+   if (ctx->Driver.ColorMaskIndexed) {
+      GLuint i;
+      for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
+         ctx->Driver.ColorMaskIndexed(ctx, i,
+                                      ctx->Color.ColorMask[0][RCOMP],
+                                      ctx->Color.ColorMask[0][GCOMP],
+                                      ctx->Color.ColorMask[0][BCOMP],
+                                      ctx->Color.ColorMask[0][ACOMP]);
+      }
+   }
+   else {
+      ctx->Driver.ColorMask(ctx,
+                            ctx->Color.ColorMask[0][RCOMP],
+                            ctx->Color.ColorMask[0][GCOMP],
+                            ctx->Color.ColorMask[0][BCOMP],
+                            ctx->Color.ColorMask[0][ACOMP]);
+   }
 
    ctx->Driver.CullFace(ctx, ctx->Polygon.CullFaceMode);
    ctx->Driver.DepthFunc(ctx, ctx->Depth.Func);
diff --git a/src/mesa/drivers/common/meta.c b/src/mesa/drivers/common/meta.c
index da2c06677a6..0676173745c 100644
--- a/src/mesa/drivers/common/meta.c
+++ b/src/mesa/drivers/common/meta.c
@@ -111,7 +111,7 @@ struct save_state
    GLboolean ColorLogicOpEnabled;
 
    /** META_COLOR_MASK */
-   GLubyte ColorMask[4];
+   GLubyte ColorMask[MAX_DRAW_BUFFERS][4];
 
    /** META_DEPTH_TEST */
    struct gl_depthbuffer_attrib Depth;
@@ -347,11 +347,12 @@ _mesa_meta_begin(GLcontext *ctx, GLbitfield state)
    }
 
    if (state & META_COLOR_MASK) {
-      COPY_4V(save->ColorMask, ctx->Color.ColorMask);
-      if (!ctx->Color.ColorMask[0] ||
-          !ctx->Color.ColorMask[1] ||
-          !ctx->Color.ColorMask[2] ||
-          !ctx->Color.ColorMask[3])
+      memcpy(save->ColorMask, ctx->Color.ColorMask,
+             sizeof(ctx->Color.ColorMask));
+      if (!ctx->Color.ColorMask[0][0] ||
+          !ctx->Color.ColorMask[0][1] ||
+          !ctx->Color.ColorMask[0][2] ||
+          !ctx->Color.ColorMask[0][3])
          _mesa_ColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
    }
 
@@ -581,9 +582,22 @@ _mesa_meta_end(GLcontext *ctx)
    }
 
    if (state & META_COLOR_MASK) {
-      if (!TEST_EQ_4V(ctx->Color.ColorMask, save->ColorMask))
-         _mesa_ColorMask(save->ColorMask[0], save->ColorMask[1],
-                         save->ColorMask[2], save->ColorMask[3]);
+      GLuint i;
+      for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
+         if (!TEST_EQ_4V(ctx->Color.ColorMask[i], save->ColorMask[i])) {
+            if (i == 0) {
+               _mesa_ColorMask(save->ColorMask[i][0], save->ColorMask[i][1],
+                               save->ColorMask[i][2], save->ColorMask[i][3]);
+            }
+            else {
+               _mesa_ColorMaskIndexed(i,
+                                      save->ColorMask[i][0],
+                                      save->ColorMask[i][1],
+                                      save->ColorMask[i][2],
+                                      save->ColorMask[i][3]);
+            }
+         }
+      }
    }
 
    if (state & META_DEPTH_TEST) {
diff --git a/src/mesa/drivers/directfb/idirectfbgl_mesa.c b/src/mesa/drivers/directfb/idirectfbgl_mesa.c
index 93593403c13..62a3269d171 100644
--- a/src/mesa/drivers/directfb/idirectfbgl_mesa.c
+++ b/src/mesa/drivers/directfb/idirectfbgl_mesa.c
@@ -407,10 +407,10 @@ dfbClear( GLcontext *ctx, GLbitfield mask )
 #define BUFFER_BIT_MASK (BUFFER_BIT_FRONT_LEFT | BUFFER_BIT_FRONT_RIGHT | \
                          BUFFER_BIT_BACK_LEFT  | BUFFER_BIT_BACK_RIGHT  )
      if (mask & BUFFER_BIT_MASK  &&
-         ctx->Color.ColorMask[0] &&
-         ctx->Color.ColorMask[1] &&
-         ctx->Color.ColorMask[2] &&
-         ctx->Color.ColorMask[3])
+         ctx->Color.ColorMask[0][0] &&
+         ctx->Color.ColorMask[0][1] &&
+         ctx->Color.ColorMask[0][2] &&
+         ctx->Color.ColorMask[0][3])
      {
           DFBRegion clip;
           GLubyte   a, r, g, b;
diff --git a/src/mesa/drivers/dri/gamma/gamma_state.c b/src/mesa/drivers/dri/gamma/gamma_state.c
index 59272f9bc91..bdd1c86ab71 100644
--- a/src/mesa/drivers/dri/gamma/gamma_state.c
+++ b/src/mesa/drivers/dri/gamma/gamma_state.c
@@ -813,10 +813,10 @@ static void gammaUpdateMasks( GLcontext *ctx )
 
 
    GLuint mask = gammaPackColor( gmesa->gammaScreen->cpp,
-				ctx->Color.ColorMask[RCOMP],
-				ctx->Color.ColorMask[GCOMP],
-				ctx->Color.ColorMask[BCOMP],
-				ctx->Color.ColorMask[ACOMP] );
+				ctx->Color.ColorMask[0][RCOMP],
+				ctx->Color.ColorMask[0][GCOMP],
+				ctx->Color.ColorMask[0][BCOMP],
+				ctx->Color.ColorMask[0][ACOMP] );
 
    if (gmesa->gammaScreen->cpp == 2) mask |= mask << 16;
 
diff --git a/src/mesa/drivers/dri/i965/brw_wm_surface_state.c b/src/mesa/drivers/dri/i965/brw_wm_surface_state.c
index 8810f2a3808..7aca3aac8e4 100644
--- a/src/mesa/drivers/dri/i965/brw_wm_surface_state.c
+++ b/src/mesa/drivers/dri/i965/brw_wm_surface_state.c
@@ -575,7 +575,7 @@ brw_update_renderbuffer_surface(struct brw_context *brw,
       key.draw_offset = 0;
    }
    /* _NEW_COLOR */
-   memcpy(key.color_mask, ctx->Color.ColorMask,
+   memcpy(key.color_mask, ctx->Color.ColorMask[0],
 	  sizeof(key.color_mask));
 
    /* As mentioned above, disable writes to the alpha component when the
diff --git a/src/mesa/drivers/dri/intel/intel_clear.c b/src/mesa/drivers/dri/intel/intel_clear.c
index f682ee3de5b..956f2339ff0 100644
--- a/src/mesa/drivers/dri/intel/intel_clear.c
+++ b/src/mesa/drivers/dri/intel/intel_clear.c
@@ -68,7 +68,7 @@ static void
 intelClear(GLcontext *ctx, GLbitfield mask)
 {
    struct intel_context *intel = intel_context(ctx);
-   const GLuint colorMask = *((GLuint *) & ctx->Color.ColorMask);
+   const GLuint colorMask = *((GLuint *) & ctx->Color.ColorMask[0]);
    GLbitfield tri_mask = 0;
    GLbitfield blit_mask = 0;
    GLbitfield swrast_mask = 0;
diff --git a/src/mesa/drivers/dri/intel/intel_pixel.c b/src/mesa/drivers/dri/intel/intel_pixel.c
index 993e427a992..5142f3dcd99 100644
--- a/src/mesa/drivers/dri/intel/intel_pixel.c
+++ b/src/mesa/drivers/dri/intel/intel_pixel.c
@@ -88,10 +88,10 @@ intel_check_blit_fragment_ops(GLcontext * ctx, GLboolean src_alpha_is_one)
       return GL_FALSE;
    }
 
-   if (!(ctx->Color.ColorMask[0] &&
-	 ctx->Color.ColorMask[1] &&
-	 ctx->Color.ColorMask[2] &&
-	 ctx->Color.ColorMask[3])) {
+   if (!(ctx->Color.ColorMask[0][0] &&
+	 ctx->Color.ColorMask[0][1] &&
+	 ctx->Color.ColorMask[0][2] &&
+	 ctx->Color.ColorMask[0][3])) {
       DBG("fallback due to color masking\n");
       return GL_FALSE;
    }
diff --git a/src/mesa/drivers/dri/intel/intel_pixel_copy.c b/src/mesa/drivers/dri/intel/intel_pixel_copy.c
index 622aaa22d67..689a00cb00b 100644
--- a/src/mesa/drivers/dri/intel/intel_pixel_copy.c
+++ b/src/mesa/drivers/dri/intel/intel_pixel_copy.c
@@ -83,10 +83,10 @@ intel_check_copypixel_blit_fragment_ops(GLcontext * ctx)
             ctx->Depth.Test ||
             ctx->Fog.Enabled ||
             ctx->Stencil._Enabled ||
-            !ctx->Color.ColorMask[0] ||
-            !ctx->Color.ColorMask[1] ||
-            !ctx->Color.ColorMask[2] ||
-            !ctx->Color.ColorMask[3] ||
+            !ctx->Color.ColorMask[0][0] ||
+            !ctx->Color.ColorMask[0][1] ||
+            !ctx->Color.ColorMask[0][2] ||
+            !ctx->Color.ColorMask[0][3] ||
             ctx->Texture._EnabledUnits ||
 	    ctx->FragmentProgram._Enabled ||
 	    ctx->Color.BlendEnabled);
diff --git a/src/mesa/drivers/dri/mach64/mach64_state.c b/src/mesa/drivers/dri/mach64/mach64_state.c
index 3a023187ce7..902905de71e 100644
--- a/src/mesa/drivers/dri/mach64/mach64_state.c
+++ b/src/mesa/drivers/dri/mach64/mach64_state.c
@@ -527,10 +527,10 @@ static void mach64UpdateMasks( GLcontext *ctx )
    /* mach64 can't color mask with alpha blending enabled */
    if ( !ctx->Color.BlendEnabled ) {
       mask = mach64PackColor( mmesa->mach64Screen->cpp,
-			      ctx->Color.ColorMask[RCOMP],
-			      ctx->Color.ColorMask[GCOMP],
-			      ctx->Color.ColorMask[BCOMP],
-			      ctx->Color.ColorMask[ACOMP] );
+			      ctx->Color.ColorMask[0][RCOMP],
+			      ctx->Color.ColorMask[0][GCOMP],
+			      ctx->Color.ColorMask[0][BCOMP],
+			      ctx->Color.ColorMask[0][ACOMP] );
    }
 
    if ( mmesa->setup.dp_write_mask != mask ) {
diff --git a/src/mesa/drivers/dri/mga/mgapixel.c b/src/mesa/drivers/dri/mga/mgapixel.c
index 977dfa0b760..05b30ba61e2 100644
--- a/src/mesa/drivers/dri/mga/mgapixel.c
+++ b/src/mesa/drivers/dri/mga/mgapixel.c
@@ -134,10 +134,10 @@ check_color_per_fragment_ops( const GLcontext *ctx )
 		    ctx->Fog.Enabled ||
 		    ctx->Scissor.Enabled ||
 		    ctx->Stencil._Enabled ||
-		    !ctx->Color.ColorMask[0] ||
-		    !ctx->Color.ColorMask[1] ||
-		    !ctx->Color.ColorMask[2] ||
-		    !ctx->Color.ColorMask[3] ||
+		    !ctx->Color.ColorMask[0][0] ||
+		    !ctx->Color.ColorMask[0][1] ||
+		    !ctx->Color.ColorMask[0][2] ||
+		    !ctx->Color.ColorMask[0][3] ||
 		    ctx->Color.ColorLogicOpEnabled ||
 		    ctx->Texture._EnabledUnits
            ) &&
@@ -150,10 +150,10 @@ static GLboolean
 check_depth_per_fragment_ops( const GLcontext *ctx )
 {
    return ( ctx->Current.RasterPosValid &&
-	    ctx->Color.ColorMask[RCOMP] == 0 &&
-	    ctx->Color.ColorMask[BCOMP] == 0 &&
-	    ctx->Color.ColorMask[GCOMP] == 0 &&
-	    ctx->Color.ColorMask[ACOMP] == 0 &&
+	    ctx->Color.ColorMask[0][RCOMP] == 0 &&
+	    ctx->Color.ColorMask[0][BCOMP] == 0 &&
+	    ctx->Color.ColorMask[0][GCOMP] == 0 &&
+	    ctx->Color.ColorMask[0][ACOMP] == 0 &&
 	    ctx->Pixel.ZoomX == 1.0F &&
 	    ( ctx->Pixel.ZoomY == 1.0F || ctx->Pixel.ZoomY == -1.0F ) );
 }
@@ -525,10 +525,10 @@ mgaTryDrawPixels( GLcontext *ctx,
 	      mmesa->mgaScreen->backOffset);
 
       planemask = mgaPackColor(cpp,
-			       ctx->Color.ColorMask[RCOMP],
-			       ctx->Color.ColorMask[GCOMP],
-			       ctx->Color.ColorMask[BCOMP],
-			       ctx->Color.ColorMask[ACOMP]);
+			       ctx->Color.ColorMask[0][RCOMP],
+			       ctx->Color.ColorMask[0][GCOMP],
+			       ctx->Color.ColorMask[0][BCOMP],
+			       ctx->Color.ColorMask[0][ACOMP]);
 
       if (cpp == 2)
 	 planemask |= planemask << 16;
diff --git a/src/mesa/drivers/dri/mga/mgastate.c b/src/mesa/drivers/dri/mga/mgastate.c
index 7c830ec0974..1e51057534b 100644
--- a/src/mesa/drivers/dri/mga/mgastate.c
+++ b/src/mesa/drivers/dri/mga/mgastate.c
@@ -374,13 +374,11 @@ static void mgaDDColorMask(GLcontext *ctx,
 {
    mgaContextPtr mmesa = MGA_CONTEXT( ctx );
    mgaScreenPrivate *mgaScreen = mmesa->mgaScreen;
-
-
    GLuint mask = mgaPackColor(mgaScreen->cpp,
-			      ctx->Color.ColorMask[RCOMP],
-			      ctx->Color.ColorMask[GCOMP],
-			      ctx->Color.ColorMask[BCOMP],
-			      ctx->Color.ColorMask[ACOMP]);
+			      ctx->Color.ColorMask[0][RCOMP],
+			      ctx->Color.ColorMask[0][GCOMP],
+			      ctx->Color.ColorMask[0][BCOMP],
+			      ctx->Color.ColorMask[0][ACOMP]);
 
    if (mgaScreen->cpp == 2)
       mask = mask | (mask << 16);
diff --git a/src/mesa/drivers/dri/r128/r128_state.c b/src/mesa/drivers/dri/r128/r128_state.c
index 4ae7bf5b97d..ac175d59ec3 100644
--- a/src/mesa/drivers/dri/r128/r128_state.c
+++ b/src/mesa/drivers/dri/r128/r128_state.c
@@ -702,10 +702,10 @@ static void r128UpdateMasks( GLcontext *ctx )
    r128ContextPtr rmesa = R128_CONTEXT(ctx);
 
    GLuint mask = r128PackColor( rmesa->r128Screen->cpp,
-				ctx->Color.ColorMask[RCOMP],
-				ctx->Color.ColorMask[GCOMP],
-				ctx->Color.ColorMask[BCOMP],
-				ctx->Color.ColorMask[ACOMP] );
+				ctx->Color.ColorMask[0][RCOMP],
+				ctx->Color.ColorMask[0][GCOMP],
+				ctx->Color.ColorMask[0][BCOMP],
+				ctx->Color.ColorMask[0][ACOMP] );
 
    if ( rmesa->setup.plane_3d_mask_c != mask ) {
       rmesa->setup.plane_3d_mask_c = mask;
diff --git a/src/mesa/drivers/dri/r200/r200_pixel.c b/src/mesa/drivers/dri/r200/r200_pixel.c
index 95773871e02..94e43c7d66f 100644
--- a/src/mesa/drivers/dri/r200/r200_pixel.c
+++ b/src/mesa/drivers/dri/r200/r200_pixel.c
@@ -88,10 +88,10 @@ check_color_per_fragment_ops( const GLcontext *ctx )
 		    ctx->Fog.Enabled ||
 		    ctx->Scissor.Enabled ||
 		    ctx->Stencil._Enabled ||
-		    !ctx->Color.ColorMask[0] ||
-		    !ctx->Color.ColorMask[1] ||
-		    !ctx->Color.ColorMask[2] ||
-		    !ctx->Color.ColorMask[3] ||
+		    !ctx->Color.ColorMask[0][0] ||
+		    !ctx->Color.ColorMask[0][1] ||
+		    !ctx->Color.ColorMask[0][2] ||
+		    !ctx->Color.ColorMask[0][3] ||
 		    ctx->Color.ColorLogicOpEnabled ||
 		    ctx->Texture._EnabledUnits
            ) &&
@@ -400,10 +400,10 @@ r200TryDrawPixels( GLcontext *ctx,
    case GL_RGBA:
    case GL_BGRA:
       planemask = radeonPackColor(cpp,
-				ctx->Color.ColorMask[RCOMP],
-				ctx->Color.ColorMask[GCOMP],
-				ctx->Color.ColorMask[BCOMP],
-				ctx->Color.ColorMask[ACOMP]);
+				ctx->Color.ColorMask[0][RCOMP],
+				ctx->Color.ColorMask[0][GCOMP],
+				ctx->Color.ColorMask[0][BCOMP],
+				ctx->Color.ColorMask[0][ACOMP]);
 
       if (cpp == 2)
 	 planemask |= planemask << 16;
diff --git a/src/mesa/drivers/dri/r200/r200_state.c b/src/mesa/drivers/dri/r200/r200_state.c
index 6d99c039ded..529cb622640 100644
--- a/src/mesa/drivers/dri/r200/r200_state.c
+++ b/src/mesa/drivers/dri/r200/r200_state.c
@@ -721,10 +721,10 @@ static void r200ColorMask( GLcontext *ctx,
    if (!rrb)
      return;
    mask = radeonPackColor( rrb->cpp,
-			   ctx->Color.ColorMask[RCOMP],
-			   ctx->Color.ColorMask[GCOMP],
-			   ctx->Color.ColorMask[BCOMP],
-			   ctx->Color.ColorMask[ACOMP] );
+			   ctx->Color.ColorMask[0][RCOMP],
+			   ctx->Color.ColorMask[0][GCOMP],
+			   ctx->Color.ColorMask[0][BCOMP],
+			   ctx->Color.ColorMask[0][ACOMP] );
 
 
    if (!(r && g && b && a))
diff --git a/src/mesa/drivers/dri/r300/r300_state.c b/src/mesa/drivers/dri/r300/r300_state.c
index 23f81fe7901..f90bfd4f4f2 100644
--- a/src/mesa/drivers/dri/r300/r300_state.c
+++ b/src/mesa/drivers/dri/r300/r300_state.c
@@ -1768,9 +1768,10 @@ static void r300ResetHwState(r300ContextPtr r300)
 	radeon_firevertices(&r300->radeon);
 
 	r300ColorMask(ctx,
-		      ctx->Color.ColorMask[RCOMP],
-		      ctx->Color.ColorMask[GCOMP],
-		      ctx->Color.ColorMask[BCOMP], ctx->Color.ColorMask[ACOMP]);
+		      ctx->Color.ColorMask[0][RCOMP],
+		      ctx->Color.ColorMask[0][GCOMP],
+		      ctx->Color.ColorMask[0][BCOMP],
+                      ctx->Color.ColorMask[0][ACOMP]);
 
 	r300Enable(ctx, GL_DEPTH_TEST, ctx->Depth.Test);
 	r300DepthMask(ctx, ctx->Depth.Mask);
diff --git a/src/mesa/drivers/dri/r600/r700_clear.c b/src/mesa/drivers/dri/r600/r700_clear.c
index 526d3843d16..c0ac54a8445 100644
--- a/src/mesa/drivers/dri/r600/r700_clear.c
+++ b/src/mesa/drivers/dri/r600/r700_clear.c
@@ -50,7 +50,7 @@ void r700Clear(GLcontext * ctx, GLbitfield mask)
 {
     context_t *context = R700_CONTEXT(ctx);
     __DRIdrawablePrivate *dPriv = radeon_get_drawable(&context->radeon);
-    const GLuint colorMask = *((GLuint *) & ctx->Color.ColorMask);
+    const GLuint colorMask = *((GLuint *) & ctx->Color.ColorMask[0]);
     GLbitfield swrast_mask = 0, tri_mask = 0;
     int i;
     struct gl_framebuffer *fb = ctx->DrawBuffer;
diff --git a/src/mesa/drivers/dri/r600/r700_state.c b/src/mesa/drivers/dri/r600/r700_state.c
index 16b05d5cd9a..fc6fb29fd6f 100644
--- a/src/mesa/drivers/dri/r600/r700_state.c
+++ b/src/mesa/drivers/dri/r600/r700_state.c
@@ -1724,10 +1724,10 @@ void r700InitState(GLcontext * ctx) //-------------------
     r700InitSQConfig(ctx);
 
     r700ColorMask(ctx,
-		  ctx->Color.ColorMask[RCOMP],
-		  ctx->Color.ColorMask[GCOMP],
-		  ctx->Color.ColorMask[BCOMP],
-		  ctx->Color.ColorMask[ACOMP]);
+		  ctx->Color.ColorMask[0][RCOMP],
+		  ctx->Color.ColorMask[0][GCOMP],
+		  ctx->Color.ColorMask[0][BCOMP],
+		  ctx->Color.ColorMask[0][ACOMP]);
 
     r700Enable(ctx, GL_DEPTH_TEST, ctx->Depth.Test);
     r700DepthMask(ctx, ctx->Depth.Mask);
diff --git a/src/mesa/drivers/dri/radeon/radeon_state.c b/src/mesa/drivers/dri/radeon/radeon_state.c
index f6c733ab209..1fcb5452047 100644
--- a/src/mesa/drivers/dri/radeon/radeon_state.c
+++ b/src/mesa/drivers/dri/radeon/radeon_state.c
@@ -521,10 +521,10 @@ static void radeonColorMask( GLcontext *ctx,
      return;
 
    mask = radeonPackColor( rrb->cpp,
-			   ctx->Color.ColorMask[RCOMP],
-			   ctx->Color.ColorMask[GCOMP],
-			   ctx->Color.ColorMask[BCOMP],
-			   ctx->Color.ColorMask[ACOMP] );
+			   ctx->Color.ColorMask[0][RCOMP],
+			   ctx->Color.ColorMask[0][GCOMP],
+			   ctx->Color.ColorMask[0][BCOMP],
+			   ctx->Color.ColorMask[0][ACOMP] );
 
    if ( rmesa->hw.msk.cmd[MSK_RB3D_PLANEMASK] != mask ) {
       RADEON_STATECHANGE( rmesa, msk );
diff --git a/src/mesa/drivers/dri/savage/savageioctl.c b/src/mesa/drivers/dri/savage/savageioctl.c
index 77ab8d16e0a..706fc97935a 100644
--- a/src/mesa/drivers/dri/savage/savageioctl.c
+++ b/src/mesa/drivers/dri/savage/savageioctl.c
@@ -360,15 +360,15 @@ static void savageDDClear( GLcontext *ctx, GLbitfield mask )
    depthMask = 0;
    switch (imesa->savageScreen->cpp) {
    case 2:
-       colorMask = PACK_COLOR_565(ctx->Color.ColorMask[0],
-				  ctx->Color.ColorMask[1],
-				  ctx->Color.ColorMask[2]);
+       colorMask = PACK_COLOR_565(ctx->Color.ColorMask[0][0],
+				  ctx->Color.ColorMask[0][1],
+				  ctx->Color.ColorMask[0][2]);
        break;
    case 4:
-       colorMask = PACK_COLOR_8888(ctx->Color.ColorMask[3],
-				   ctx->Color.ColorMask[2],
-				   ctx->Color.ColorMask[1],
-				   ctx->Color.ColorMask[0]);
+       colorMask = PACK_COLOR_8888(ctx->Color.ColorMask[0][3],
+				   ctx->Color.ColorMask[0][2],
+				   ctx->Color.ColorMask[0][1],
+				   ctx->Color.ColorMask[0][0]);
        break;
    }
 
diff --git a/src/mesa/drivers/dri/tdfx/tdfx_pixels.c b/src/mesa/drivers/dri/tdfx/tdfx_pixels.c
index 18729d5ae08..a3b1775e900 100644
--- a/src/mesa/drivers/dri/tdfx/tdfx_pixels.c
+++ b/src/mesa/drivers/dri/tdfx/tdfx_pixels.c
@@ -611,10 +611,10 @@ tdfx_drawpixels_R8G8B8A8(GLcontext * ctx, GLint x, GLint y,
        ctx->Fog.Enabled ||
        ctx->Scissor.Enabled ||
        ctx->Stencil._Enabled ||
-       !ctx->Color.ColorMask[0] ||
-       !ctx->Color.ColorMask[1] ||
-       !ctx->Color.ColorMask[2] ||
-       !ctx->Color.ColorMask[3] ||
+       !ctx->Color.ColorMask[0][0] ||
+       !ctx->Color.ColorMask[0][1] ||
+       !ctx->Color.ColorMask[0][2] ||
+       !ctx->Color.ColorMask[0][3] ||
        ctx->Color.ColorLogicOpEnabled ||
        ctx->Texture._EnabledUnits ||
        fxMesa->Fallback)       
diff --git a/src/mesa/drivers/dri/tdfx/tdfx_render.c b/src/mesa/drivers/dri/tdfx/tdfx_render.c
index 2cd8e12d955..79d63f72acc 100644
--- a/src/mesa/drivers/dri/tdfx/tdfx_render.c
+++ b/src/mesa/drivers/dri/tdfx/tdfx_render.c
@@ -76,8 +76,8 @@ static void tdfxClear( GLcontext *ctx, GLbitfield mask )
 
    if (fxMesa->glCtx->Visual.redBits != 8) {
       /* can only do color masking if running in 24/32bpp on Napalm */
-      if (ctx->Color.ColorMask[RCOMP] != ctx->Color.ColorMask[GCOMP] ||
-          ctx->Color.ColorMask[GCOMP] != ctx->Color.ColorMask[BCOMP]) {
+      if (ctx->Color.ColorMask[0][RCOMP] != ctx->Color.ColorMask[0][GCOMP] ||
+          ctx->Color.ColorMask[0][GCOMP] != ctx->Color.ColorMask[0][BCOMP]) {
          softwareMask |= (mask & (BUFFER_BIT_FRONT_LEFT | BUFFER_BIT_BACK_LEFT));
          mask &= ~(BUFFER_BIT_FRONT_LEFT | BUFFER_BIT_BACK_LEFT);
       }
@@ -721,7 +721,7 @@ void tdfxEmitHwStateLocked( tdfxContextPtr fxMesa )
 	 fxMesa->Glide.grColorMask( fxMesa->Color.ColorMask[RCOMP] ||
                                     fxMesa->Color.ColorMask[GCOMP] ||
                                     fxMesa->Color.ColorMask[BCOMP],
-                                    /*fxMesa->Color.ColorMask[ACOMP]*/GL_FALSE/*[dBorca] no-no*/ );
+                                    /*fxMesa->Color.ColorMask[0][ACOMP]*/GL_FALSE/*[dBorca] no-no*/ );
       }
       fxMesa->dirty &= ~TDFX_UPLOAD_COLOR_MASK;
    }
diff --git a/src/mesa/drivers/dri/unichrome/via_state.c b/src/mesa/drivers/dri/unichrome/via_state.c
index 840e4e42da9..a9db6c45f7d 100644
--- a/src/mesa/drivers/dri/unichrome/via_state.c
+++ b/src/mesa/drivers/dri/unichrome/via_state.c
@@ -1238,12 +1238,12 @@ static void viaChooseColorState(GLcontext *ctx)
     else
         vmesa->regHROP = HC_HROP_P;
 
-    vmesa->regHFBBMSKL = PACK_COLOR_888(ctx->Color.ColorMask[0],
-					ctx->Color.ColorMask[1],
-					ctx->Color.ColorMask[2]);
-    vmesa->regHROP |= ctx->Color.ColorMask[3];
+    vmesa->regHFBBMSKL = PACK_COLOR_888(ctx->Color.ColorMask[0][0],
+					ctx->Color.ColorMask[0][1],
+					ctx->Color.ColorMask[0][2]);
+    vmesa->regHROP |= ctx->Color.ColorMask[0][3];
 
-    if (ctx->Color.ColorMask[3])
+    if (ctx->Color.ColorMask[0][3])
         vmesa->regEnable |= HC_HenAW_MASK;
     else
         vmesa->regEnable &= ~HC_HenAW_MASK;
diff --git a/src/mesa/drivers/windows/gdi/wmesa.c b/src/mesa/drivers/windows/gdi/wmesa.c
index 8929b22af16..76c825a0904 100644
--- a/src/mesa/drivers/windows/gdi/wmesa.c
+++ b/src/mesa/drivers/windows/gdi/wmesa.c
@@ -301,10 +301,10 @@ static void clear(GLcontext *ctx, GLbitfield mask)
 
     /* Let swrast do all the work if the masks are not set to
      * clear all channels. */
-    if (ctx->Color.ColorMask[0] != 0xff ||
-	ctx->Color.ColorMask[1] != 0xff ||
-	ctx->Color.ColorMask[2] != 0xff ||
-	ctx->Color.ColorMask[3] != 0xff) {
+    if (!ctx->Color.ColorMask[0][0] ||
+	!ctx->Color.ColorMask[0][1] ||
+	!ctx->Color.ColorMask[0][2] ||
+	!ctx->Color.ColorMask[0][3]) {
 	_swrast_Clear(ctx, mask);
 	return;
     }
diff --git a/src/mesa/drivers/windows/gldirect/dx7/gld_driver_dx7.c b/src/mesa/drivers/windows/gldirect/dx7/gld_driver_dx7.c
index d5fa6428006..7b202dfda70 100644
--- a/src/mesa/drivers/windows/gldirect/dx7/gld_driver_dx7.c
+++ b/src/mesa/drivers/windows/gldirect/dx7/gld_driver_dx7.c
@@ -269,7 +269,7 @@ void gld_Clear_DX7(
 	D3DRECT		d3dClearRect;
 
 	// TODO: Colourmask
-	const GLuint *colorMask = (GLuint *) &ctx->Color.ColorMask;
+	const GLuint *colorMask = (GLuint *) &ctx->Color.ColorMask[0];
 
 	if (!gld->pDev)
 		return;
@@ -427,10 +427,10 @@ void gld_NEW_COLOR(
 
 /*
 	// Color mask - unsupported by DX7
-	if (ctx->Color.ColorMask[0]) dwFlags |= D3DCOLORWRITEENABLE_RED;
-	if (ctx->Color.ColorMask[1]) dwFlags |= D3DCOLORWRITEENABLE_GREEN;
-	if (ctx->Color.ColorMask[2]) dwFlags |= D3DCOLORWRITEENABLE_BLUE;
-	if (ctx->Color.ColorMask[3]) dwFlags |= D3DCOLORWRITEENABLE_ALPHA;
+	if (ctx->Color.ColorMask[0][0]) dwFlags |= D3DCOLORWRITEENABLE_RED;
+	if (ctx->Color.ColorMask[0][1]) dwFlags |= D3DCOLORWRITEENABLE_GREEN;
+	if (ctx->Color.ColorMask[0][2]) dwFlags |= D3DCOLORWRITEENABLE_BLUE;
+	if (ctx->Color.ColorMask[0][3]) dwFlags |= D3DCOLORWRITEENABLE_ALPHA;
 	_GLD_DX7_DEV(SetRenderState(gld->pDev, D3DRENDERSTATE_COLORWRITEENABLE, dwFlags));
 */
 }
diff --git a/src/mesa/drivers/windows/gldirect/dx8/gld_driver_dx8.c b/src/mesa/drivers/windows/gldirect/dx8/gld_driver_dx8.c
index 7afa9190cdf..7eeb9db2d15 100644
--- a/src/mesa/drivers/windows/gldirect/dx8/gld_driver_dx8.c
+++ b/src/mesa/drivers/windows/gldirect/dx8/gld_driver_dx8.c
@@ -269,7 +269,7 @@ void gld_Clear_DX8(
 	D3DRECT		d3dClearRect;
 
 	// TODO: Colourmask
-	const GLuint *colorMask = (GLuint *) &ctx->Color.ColorMask;
+	const GLuint *colorMask = (GLuint *) &ctx->Color.ColorMask[0];
 
 	if (!gld->pDev)
 		return;
@@ -426,10 +426,10 @@ void gld_NEW_COLOR(
 	_GLD_DX8_DEV(SetRenderState(gld->pDev, D3DRS_DESTBLEND, dest));
 
 	// Color mask
-	if (ctx->Color.ColorMask[0]) dwFlags |= D3DCOLORWRITEENABLE_RED;
-	if (ctx->Color.ColorMask[1]) dwFlags |= D3DCOLORWRITEENABLE_GREEN;
-	if (ctx->Color.ColorMask[2]) dwFlags |= D3DCOLORWRITEENABLE_BLUE;
-	if (ctx->Color.ColorMask[3]) dwFlags |= D3DCOLORWRITEENABLE_ALPHA;
+	if (ctx->Color.ColorMask[0][0]) dwFlags |= D3DCOLORWRITEENABLE_RED;
+	if (ctx->Color.ColorMask[0][1]) dwFlags |= D3DCOLORWRITEENABLE_GREEN;
+	if (ctx->Color.ColorMask[0][2]) dwFlags |= D3DCOLORWRITEENABLE_BLUE;
+	if (ctx->Color.ColorMask[0][3]) dwFlags |= D3DCOLORWRITEENABLE_ALPHA;
 	_GLD_DX8_DEV(SetRenderState(gld->pDev, D3DRS_COLORWRITEENABLE, dwFlags));
 }
 
diff --git a/src/mesa/drivers/windows/gldirect/dx9/gld_driver_dx9.c b/src/mesa/drivers/windows/gldirect/dx9/gld_driver_dx9.c
index c191564d6eb..0558462dea0 100644
--- a/src/mesa/drivers/windows/gldirect/dx9/gld_driver_dx9.c
+++ b/src/mesa/drivers/windows/gldirect/dx9/gld_driver_dx9.c
@@ -269,7 +269,7 @@ void gld_Clear_DX9(
 	D3DRECT		d3dClearRect;
 
 	// TODO: Colourmask
-	const GLuint *colorMask = (GLuint *) &ctx->Color.ColorMask;
+	const GLuint *colorMask = (GLuint *) &ctx->Color.ColorMask[0];
 
 	if (!gld->pDev)
 		return;
@@ -424,10 +424,10 @@ void gld_NEW_COLOR(
 	_GLD_DX9_DEV(SetRenderState(gld->pDev, D3DRS_DESTBLEND, dest));
 
 	// Color mask
-	if (ctx->Color.ColorMask[0]) dwFlags |= D3DCOLORWRITEENABLE_RED;
-	if (ctx->Color.ColorMask[1]) dwFlags |= D3DCOLORWRITEENABLE_GREEN;
-	if (ctx->Color.ColorMask[2]) dwFlags |= D3DCOLORWRITEENABLE_BLUE;
-	if (ctx->Color.ColorMask[3]) dwFlags |= D3DCOLORWRITEENABLE_ALPHA;
+	if (ctx->Color.ColorMask[0][0]) dwFlags |= D3DCOLORWRITEENABLE_RED;
+	if (ctx->Color.ColorMask[0][1]) dwFlags |= D3DCOLORWRITEENABLE_GREEN;
+	if (ctx->Color.ColorMask[0][2]) dwFlags |= D3DCOLORWRITEENABLE_BLUE;
+	if (ctx->Color.ColorMask[0][3]) dwFlags |= D3DCOLORWRITEENABLE_ALPHA;
 	_GLD_DX9_DEV(SetRenderState(gld->pDev, D3DRS_COLORWRITEENABLE, dwFlags));
 }
 
diff --git a/src/mesa/drivers/x11/xm_dd.c b/src/mesa/drivers/x11/xm_dd.c
index a27d7045abe..df04e3a1011 100644
--- a/src/mesa/drivers/x11/xm_dd.c
+++ b/src/mesa/drivers/x11/xm_dd.c
@@ -381,7 +381,7 @@ clear_buffers(GLcontext *ctx, GLbitfield buffers)
 {
    if (ctx->DrawBuffer->Name == 0) {
       /* this is a window system framebuffer */
-      const GLuint *colorMask = (GLuint *) &ctx->Color.ColorMask;
+      const GLuint *colorMask = (GLuint *) &ctx->Color.ColorMask[0];
       XMesaBuffer b = XMESA_BUFFER(ctx->DrawBuffer);
       const GLint x = ctx->DrawBuffer->_Xmin;
       const GLint y = ctx->DrawBuffer->_Ymin;