mesa: begin implementation of GL_ARB_draw_buffers_blend

1 files changed, 344 insertions, 159 deletions

diff --git a/src/mesa/main/blend.c b/src/mesa/main/blend.c
index ec778b7244d..43e2f7f8617 100644
--- a/src/mesa/main/blend.c
+++ b/src/mesa/main/blend.c
@@ -37,6 +37,110 @@
 #include "mtypes.h"
 
 
+
+/**
+ * Check if given blend source factor is legal.
+ * \return GL_TRUE if legal, GL_FALSE otherwise.
+ */
+static GLboolean
+legal_src_factor(const struct gl_context *ctx, GLenum factor)
+{
+   switch (factor) {
+   case GL_SRC_COLOR:
+   case GL_ONE_MINUS_SRC_COLOR:
+      return ctx->Extensions.NV_blend_square;
+   case GL_ZERO:
+   case GL_ONE:
+   case GL_DST_COLOR:
+   case GL_ONE_MINUS_DST_COLOR:
+   case GL_SRC_ALPHA:
+   case GL_ONE_MINUS_SRC_ALPHA:
+   case GL_DST_ALPHA:
+   case GL_ONE_MINUS_DST_ALPHA:
+   case GL_SRC_ALPHA_SATURATE:
+   case GL_CONSTANT_COLOR:
+   case GL_ONE_MINUS_CONSTANT_COLOR:
+   case GL_CONSTANT_ALPHA:
+   case GL_ONE_MINUS_CONSTANT_ALPHA:
+      return GL_TRUE;
+   default:
+      return GL_FALSE;
+   }
+}
+
+
+/**
+ * Check if given blend destination factor is legal.
+ * \return GL_TRUE if legal, GL_FALSE otherwise.
+ */
+static GLboolean
+legal_dst_factor(const struct gl_context *ctx, GLenum factor)
+{
+   switch (factor) {
+   case GL_DST_COLOR:
+   case GL_ONE_MINUS_DST_COLOR:
+      return ctx->Extensions.NV_blend_square;
+   case GL_ZERO:
+   case GL_ONE:
+   case GL_SRC_COLOR:
+   case GL_ONE_MINUS_SRC_COLOR:
+   case GL_SRC_ALPHA:
+   case GL_ONE_MINUS_SRC_ALPHA:
+   case GL_DST_ALPHA:
+   case GL_ONE_MINUS_DST_ALPHA:
+   case GL_CONSTANT_COLOR:
+   case GL_ONE_MINUS_CONSTANT_COLOR:
+   case GL_CONSTANT_ALPHA:
+   case GL_ONE_MINUS_CONSTANT_ALPHA:
+      return GL_TRUE;
+   default:
+      return GL_FALSE;
+   }
+}
+
+
+/**
+ * Check if src/dest RGB/A blend factors are legal.  If not generate
+ * a GL error.
+ * \return GL_TRUE if factors are legal, GL_FALSE otherwise.
+ */
+static GLboolean
+validate_blend_factors(struct gl_context *ctx, const char *func,
+                       GLenum sfactorRGB, GLenum dfactorRGB,
+                       GLenum sfactorA, GLenum dfactorA)
+{
+   if (!legal_src_factor(ctx, sfactorRGB)) {
+      _mesa_error(ctx, GL_INVALID_ENUM,
+                  "%s(sfactorRGB = %s)", func,
+                  _mesa_lookup_enum_by_nr(sfactorRGB));
+      return GL_FALSE;
+   }
+
+   if (!legal_dst_factor(ctx, dfactorRGB)) {
+      _mesa_error(ctx, GL_INVALID_ENUM,
+                  "%s(dfactorRGB = %s)", func,
+                  _mesa_lookup_enum_by_nr(dfactorRGB));
+      return GL_FALSE;
+   }
+
+   if (sfactorA != sfactorRGB && !legal_src_factor(ctx, sfactorA)) {
+      _mesa_error(ctx, GL_INVALID_ENUM,
+                  "%s(sfactorA = %s)", func,
+                  _mesa_lookup_enum_by_nr(sfactorA));
+      return GL_FALSE;
+   }
+
+   if (dfactorA != dfactorRGB && !legal_dst_factor(ctx, dfactorA)) {
+      _mesa_error(ctx, GL_INVALID_ENUM,
+                  "%s(dfactorA = %s)", func,
+                  _mesa_lookup_enum_by_nr(dfactorA));
+      return GL_FALSE;
+   }
+
+   return GL_TRUE;
+}
+
+
 /**
  * Specify the blending operation.
  *
@@ -53,21 +157,19 @@ _mesa_BlendFunc( GLenum sfactor, GLenum dfactor )
 
 
 /**
- * Process GL_EXT_blend_func_separate().
+ * Set the separate blend source/dest factors for all draw buffers.
  *
  * \param sfactorRGB RGB source factor operator.
  * \param dfactorRGB RGB destination factor operator.
  * \param sfactorA alpha source factor operator.
  * \param dfactorA alpha destination factor operator.
- *
- * Verifies the parameters and updates gl_colorbuffer_attrib.
- * On a change, flush the vertices and notify the driver via
- * dd_function_table::BlendFuncSeparate.
  */
 void GLAPIENTRY
 _mesa_BlendFuncSeparateEXT( GLenum sfactorRGB, GLenum dfactorRGB,
                             GLenum sfactorA, GLenum dfactorA )
 {
+   GLuint buf, numBuffers;
+   GLboolean changed;
    GET_CURRENT_CONTEXT(ctx);
    ASSERT_OUTSIDE_BEGIN_END(ctx);
 
@@ -78,165 +180,130 @@ _mesa_BlendFuncSeparateEXT( GLenum sfactorRGB, GLenum dfactorRGB,
                   _mesa_lookup_enum_by_nr(sfactorA),
                   _mesa_lookup_enum_by_nr(dfactorA));
 
-   switch (sfactorRGB) {
-      case GL_SRC_COLOR:
-      case GL_ONE_MINUS_SRC_COLOR:
-         if (!ctx->Extensions.NV_blend_square) {
-            _mesa_error(ctx, GL_INVALID_ENUM, "glBlendFunc or glBlendFuncSeparate (sfactorRGB)");
-            return;
-         }
-         /* fall-through */
-      case GL_ZERO:
-      case GL_ONE:
-      case GL_DST_COLOR:
-      case GL_ONE_MINUS_DST_COLOR:
-      case GL_SRC_ALPHA:
-      case GL_ONE_MINUS_SRC_ALPHA:
-      case GL_DST_ALPHA:
-      case GL_ONE_MINUS_DST_ALPHA:
-      case GL_SRC_ALPHA_SATURATE:
-      case GL_CONSTANT_COLOR:
-      case GL_ONE_MINUS_CONSTANT_COLOR:
-      case GL_CONSTANT_ALPHA:
-      case GL_ONE_MINUS_CONSTANT_ALPHA:
-         break;
-      default:
-         _mesa_error(ctx, GL_INVALID_ENUM, "glBlendFunc or glBlendFuncSeparate (sfactorRGB)");
-         return;
+   if (!validate_blend_factors(ctx, "glBlendFuncSeparate",
+                               sfactorRGB, dfactorRGB,
+                               sfactorA, dfactorA)) {
+      return;
    }
 
-   switch (dfactorRGB) {
-      case GL_DST_COLOR:
-      case GL_ONE_MINUS_DST_COLOR:
-         if (!ctx->Extensions.NV_blend_square) {
-            _mesa_error(ctx, GL_INVALID_ENUM, "glBlendFunc or glBlendFuncSeparate (dfactorRGB)");
-            return;
-         }
-         /* fall-through */
-      case GL_ZERO:
-      case GL_ONE:
-      case GL_SRC_COLOR:
-      case GL_ONE_MINUS_SRC_COLOR:
-      case GL_SRC_ALPHA:
-      case GL_ONE_MINUS_SRC_ALPHA:
-      case GL_DST_ALPHA:
-      case GL_ONE_MINUS_DST_ALPHA:
-      case GL_CONSTANT_COLOR:
-      case GL_ONE_MINUS_CONSTANT_COLOR:
-      case GL_CONSTANT_ALPHA:
-      case GL_ONE_MINUS_CONSTANT_ALPHA:
+   numBuffers = ctx->Extensions.ARB_draw_buffers_blend
+      ? ctx->Const.MaxDrawBuffers : 1;
+
+   changed = GL_FALSE;
+   for (buf = 0; buf < numBuffers; buf++) {
+      if (ctx->Color.Blend[buf].SrcRGB != sfactorRGB ||
+          ctx->Color.Blend[buf].DstRGB != dfactorRGB ||
+          ctx->Color.Blend[buf].SrcA != sfactorA ||
+          ctx->Color.Blend[buf].DstA != dfactorA) {
+         changed = GL_TRUE;
          break;
-      default:
-         _mesa_error(ctx, GL_INVALID_ENUM, "glBlendFunc or glBlendFuncSeparate (dfactorRGB)");
-         return;
+      }
    }
+   if (!changed)
+      return;
 
-   switch (sfactorA) {
-      case GL_SRC_COLOR:
-      case GL_ONE_MINUS_SRC_COLOR:
-         if (!ctx->Extensions.NV_blend_square) {
-            _mesa_error(ctx, GL_INVALID_ENUM, "glBlendFunc or glBlendFuncSeparate (sfactorA)");
-            return;
-         }
-         /* fall-through */
-      case GL_ZERO:
-      case GL_ONE:
-      case GL_DST_COLOR:
-      case GL_ONE_MINUS_DST_COLOR:
-      case GL_SRC_ALPHA:
-      case GL_ONE_MINUS_SRC_ALPHA:
-      case GL_DST_ALPHA:
-      case GL_ONE_MINUS_DST_ALPHA:
-      case GL_SRC_ALPHA_SATURATE:
-      case GL_CONSTANT_COLOR:
-      case GL_ONE_MINUS_CONSTANT_COLOR:
-      case GL_CONSTANT_ALPHA:
-      case GL_ONE_MINUS_CONSTANT_ALPHA:
-         break;
-      default:
-         _mesa_error(ctx, GL_INVALID_ENUM, "glBlendFunc or glBlendFuncSeparate (sfactorA)");
-         return;
+   FLUSH_VERTICES(ctx, _NEW_COLOR);
+
+   for (buf = 0; buf < numBuffers; buf++) {
+      ctx->Color.Blend[buf].SrcRGB = sfactorRGB;
+      ctx->Color.Blend[buf].DstRGB = dfactorRGB;
+      ctx->Color.Blend[buf].SrcA = sfactorA;
+      ctx->Color.Blend[buf].DstA = dfactorA;
    }
+   ctx->Color._BlendFuncPerBuffer = GL_FALSE;
 
-   switch (dfactorA) {
-      case GL_DST_COLOR:
-      case GL_ONE_MINUS_DST_COLOR:
-         if (!ctx->Extensions.NV_blend_square) {
-            _mesa_error(ctx, GL_INVALID_ENUM, "glBlendFunc or glBlendFuncSeparate (dfactorA)");
-            return;
-         }
-         /* fall-through */
-      case GL_ZERO:
-      case GL_ONE:
-      case GL_SRC_COLOR:
-      case GL_ONE_MINUS_SRC_COLOR:
-      case GL_SRC_ALPHA:
-      case GL_ONE_MINUS_SRC_ALPHA:
-      case GL_DST_ALPHA:
-      case GL_ONE_MINUS_DST_ALPHA:
-      case GL_CONSTANT_COLOR:
-      case GL_ONE_MINUS_CONSTANT_COLOR:
-      case GL_CONSTANT_ALPHA:
-      case GL_ONE_MINUS_CONSTANT_ALPHA:
-         break;
-      default:
-         _mesa_error( ctx, GL_INVALID_ENUM, "glBlendFunc or glBlendFuncSeparate (dfactorA)" );
-         return;
+   if (ctx->Driver.BlendFuncSeparate) {
+      ctx->Driver.BlendFuncSeparate(ctx, sfactorRGB, dfactorRGB,
+                                    sfactorA, dfactorA);
    }
+}
+
 
-   if (ctx->Color.BlendSrcRGB == sfactorRGB &&
-       ctx->Color.BlendDstRGB == dfactorRGB &&
-       ctx->Color.BlendSrcA == sfactorA &&
-       ctx->Color.BlendDstA == dfactorA)
+#if _HAVE_FULL_GL
+
+
+/**
+ * Set blend source/dest factors for one color buffer/target.
+ */
+void GLAPIENTRY
+_mesa_BlendFunci(GLuint buf, GLenum sfactor, GLenum dfactor)
+{
+   _mesa_BlendFuncSeparatei(buf, sfactor, dfactor, sfactor, dfactor);
+}
+
+
+/**
+ * Set separate blend source/dest factors for one color buffer/target.
+ */
+void GLAPIENTRY
+_mesa_BlendFuncSeparatei(GLuint buf, GLenum sfactorRGB, GLenum dfactorRGB,
+                         GLenum sfactorA, GLenum dfactorA)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   if (!ctx->Extensions.ARB_draw_buffers_blend) {
+      _mesa_error(ctx, GL_INVALID_OPERATION, "glBlendFunc[Separate]i()");
+      return;
+   }
+
+   if (buf >= ctx->Const.MaxDrawBuffers) {
+      _mesa_error(ctx, GL_INVALID_VALUE, "glBlendFuncSeparatei(buffer=%u)",
+                  buf);
       return;
+   }
+
+   if (!validate_blend_factors(ctx, "glBlendFuncSeparatei",
+                               sfactorRGB, dfactorRGB,
+                               sfactorA, dfactorA)) {
+      return;
+   }
+
+   if (ctx->Color.Blend[buf].SrcRGB == sfactorRGB &&
+       ctx->Color.Blend[buf].DstRGB == dfactorRGB &&
+       ctx->Color.Blend[buf].SrcA == sfactorA &&
+       ctx->Color.Blend[buf].DstA == dfactorA)
+      return; /* no change */
 
    FLUSH_VERTICES(ctx, _NEW_COLOR);
 
-   ctx->Color.BlendSrcRGB = sfactorRGB;
-   ctx->Color.BlendDstRGB = dfactorRGB;
-   ctx->Color.BlendSrcA = sfactorA;
-   ctx->Color.BlendDstA = dfactorA;
+   ctx->Color.Blend[buf].SrcRGB = sfactorRGB;
+   ctx->Color.Blend[buf].DstRGB = dfactorRGB;
+   ctx->Color.Blend[buf].SrcA = sfactorA;
+   ctx->Color.Blend[buf].DstA = dfactorA;
+   ctx->Color._BlendFuncPerBuffer = GL_TRUE;
 
-   if (ctx->Driver.BlendFuncSeparate) {
-      (*ctx->Driver.BlendFuncSeparate)( ctx, sfactorRGB, dfactorRGB,
-					sfactorA, dfactorA );
+   if (ctx->Driver.BlendFuncSeparatei) {
+      ctx->Driver.BlendFuncSeparatei(ctx, buf, sfactorRGB, dfactorRGB,
+                                     sfactorA, dfactorA);
    }
 }
 
 
-#if _HAVE_FULL_GL
-
+/**
+ * Check if given blend equation is legal.
+ * \return GL_TRUE if legal, GL_FALSE otherwise.
+ */
 static GLboolean
-_mesa_validate_blend_equation( struct gl_context *ctx,
-			       GLenum mode, GLboolean is_separate )
+legal_blend_equation(const struct gl_context *ctx,
+                     GLenum mode, GLboolean is_separate)
 {
    switch (mode) {
-      case GL_FUNC_ADD:
-         break;
-      case GL_MIN:
-      case GL_MAX:
-         if (!ctx->Extensions.EXT_blend_minmax) {
-            return GL_FALSE;
-         }
-         break;
+   case GL_FUNC_ADD:
+      return GL_TRUE;
+   case GL_MIN:
+   case GL_MAX:
+      return ctx->Extensions.EXT_blend_minmax;
+   case GL_LOGIC_OP:
       /* glBlendEquationSeparate cannot take GL_LOGIC_OP as a parameter.
        */
-      case GL_LOGIC_OP:
-         if (!ctx->Extensions.EXT_blend_logic_op || is_separate) {
-            return GL_FALSE;
-         }
-         break;
-      case GL_FUNC_SUBTRACT:
-      case GL_FUNC_REVERSE_SUBTRACT:
-         if (!ctx->Extensions.EXT_blend_subtract) {
-            return GL_FALSE;
-         }
-         break;
-      default:
-         return GL_FALSE;
+      return ctx->Extensions.EXT_blend_logic_op && !is_separate;
+   case GL_FUNC_SUBTRACT:
+   case GL_FUNC_REVERSE_SUBTRACT:
+      return ctx->Extensions.EXT_blend_subtract;
+   default:
+      return GL_FALSE;
    }
-
-   return GL_TRUE;
 }
 
 
@@ -244,6 +311,8 @@ _mesa_validate_blend_equation( struct gl_context *ctx,
 void GLAPIENTRY
 _mesa_BlendEquation( GLenum mode )
 {
+   GLuint buf, numBuffers;
+   GLboolean changed;
    GET_CURRENT_CONTEXT(ctx);
    ASSERT_OUTSIDE_BEGIN_END(ctx);
 
@@ -251,27 +320,80 @@ _mesa_BlendEquation( GLenum mode )
       _mesa_debug(ctx, "glBlendEquation %s\n",
                   _mesa_lookup_enum_by_nr(mode));
 
-   if ( ! _mesa_validate_blend_equation( ctx, mode, GL_FALSE ) ) {
+   if (!legal_blend_equation(ctx, mode, GL_FALSE)) {
       _mesa_error(ctx, GL_INVALID_ENUM, "glBlendEquation");
       return;
    }
 
-   if ( (ctx->Color.BlendEquationRGB == mode) &&
-	(ctx->Color.BlendEquationA == mode) )
+   numBuffers = ctx->Extensions.ARB_draw_buffers_blend
+      ? ctx->Const.MaxDrawBuffers : 1;
+
+   changed = GL_FALSE;
+   for (buf = 0; buf < numBuffers; buf++) {
+      if (ctx->Color.Blend[buf].EquationRGB != mode ||
+          ctx->Color.Blend[buf].EquationA != mode) {
+         changed = GL_TRUE;
+         break;
+      }
+   }
+   if (!changed)
       return;
 
    FLUSH_VERTICES(ctx, _NEW_COLOR);
-   ctx->Color.BlendEquationRGB = mode;
-   ctx->Color.BlendEquationA = mode;
+   for (buf = 0; buf < numBuffers; buf++) {
+      ctx->Color.Blend[buf].EquationRGB = mode;
+      ctx->Color.Blend[buf].EquationA = mode;
+   }
+   ctx->Color._BlendEquationPerBuffer = GL_FALSE;
 
    if (ctx->Driver.BlendEquationSeparate)
       (*ctx->Driver.BlendEquationSeparate)( ctx, mode, mode );
 }
 
 
+/**
+ * Set blend equation for one color buffer/target.
+ */
+void GLAPIENTRY
+_mesa_BlendEquationi(GLuint buf, GLenum mode)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   if (MESA_VERBOSE & VERBOSE_API)
+      _mesa_debug(ctx, "glBlendEquationi(%u, %s)\n",
+                  buf, _mesa_lookup_enum_by_nr(mode));
+
+   if (buf >= ctx->Const.MaxDrawBuffers) {
+      _mesa_error(ctx, GL_INVALID_VALUE, "glBlendFuncSeparatei(buffer=%u)",
+                  buf);
+      return;
+   }
+
+   if (!legal_blend_equation(ctx, mode, GL_FALSE)) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glBlendEquationi");
+      return;
+   }
+
+   if (ctx->Color.Blend[buf].EquationRGB == mode &&
+       ctx->Color.Blend[buf].EquationA == mode)
+      return;  /* no change */
+
+   FLUSH_VERTICES(ctx, _NEW_COLOR);
+   ctx->Color.Blend[buf].EquationRGB = mode;
+   ctx->Color.Blend[buf].EquationA = mode;
+   ctx->Color._BlendEquationPerBuffer = GL_TRUE;
+
+   if (ctx->Driver.BlendEquationSeparatei)
+      ctx->Driver.BlendEquationSeparatei(ctx, buf, mode, mode);
+}
+
+
 void GLAPIENTRY
 _mesa_BlendEquationSeparateEXT( GLenum modeRGB, GLenum modeA )
 {
+   GLuint buf, numBuffers;
+   GLboolean changed;
    GET_CURRENT_CONTEXT(ctx);
    ASSERT_OUTSIDE_BEGIN_END(ctx);
 
@@ -286,29 +408,88 @@ _mesa_BlendEquationSeparateEXT( GLenum modeRGB, GLenum modeA )
       return;
    }
 
-   if ( ! _mesa_validate_blend_equation( ctx, modeRGB, GL_TRUE ) ) {
+   if (!legal_blend_equation(ctx, modeRGB, GL_TRUE)) {
       _mesa_error(ctx, GL_INVALID_ENUM, "glBlendEquationSeparateEXT(modeRGB)");
       return;
    }
 
-   if ( ! _mesa_validate_blend_equation( ctx, modeA, GL_TRUE ) ) {
+   if (!legal_blend_equation(ctx, modeA, GL_TRUE)) {
       _mesa_error(ctx, GL_INVALID_ENUM, "glBlendEquationSeparateEXT(modeA)");
       return;
    }
 
+   numBuffers = ctx->Extensions.ARB_draw_buffers_blend
+      ? ctx->Const.MaxDrawBuffers : 1;
 
-   if ( (ctx->Color.BlendEquationRGB == modeRGB) &&
-	(ctx->Color.BlendEquationA == modeA) )
+   changed = GL_FALSE;
+   for (buf = 0; buf < numBuffers; buf++) {
+      if (ctx->Color.Blend[buf].EquationRGB != modeRGB ||
+          ctx->Color.Blend[buf].EquationA != modeA) {
+         changed = GL_TRUE;
+         break;
+      }
+   }
+   if (!changed)
       return;
 
    FLUSH_VERTICES(ctx, _NEW_COLOR);
-   ctx->Color.BlendEquationRGB = modeRGB;
-   ctx->Color.BlendEquationA = modeA;
+   for (buf = 0; buf < numBuffers; buf++) {
+      ctx->Color.Blend[buf].EquationRGB = modeRGB;
+      ctx->Color.Blend[buf].EquationA = modeA;
+   }
+   ctx->Color._BlendEquationPerBuffer = GL_FALSE;
 
    if (ctx->Driver.BlendEquationSeparate)
-      (*ctx->Driver.BlendEquationSeparate)( ctx, modeRGB, modeA );
+      ctx->Driver.BlendEquationSeparate(ctx, modeRGB, modeA);
 }
-#endif
+
+
+/**
+ * Set separate blend equations for one color buffer/target.
+ */
+void
+_mesa_BlendEquationSeparatei(GLuint buf, GLenum modeRGB, GLenum modeA)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   if (MESA_VERBOSE & VERBOSE_API)
+      _mesa_debug(ctx, "glBlendEquationSeparatei %u, %s %s\n", buf,
+                  _mesa_lookup_enum_by_nr(modeRGB),
+                  _mesa_lookup_enum_by_nr(modeA));
+
+   if (buf >= ctx->Const.MaxDrawBuffers) {
+      _mesa_error(ctx, GL_INVALID_VALUE, "glBlendEquationSeparatei(buffer=%u)",
+                  buf);
+      return;
+   }
+
+   if (!legal_blend_equation(ctx, modeRGB, GL_TRUE)) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glBlendEquationSeparatei(modeRGB)");
+      return;
+   }
+
+   if (!legal_blend_equation(ctx, modeA, GL_TRUE)) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glBlendEquationSeparatei(modeA)");
+      return;
+   }
+
+   if (ctx->Color.Blend[buf].EquationRGB == modeRGB &&
+       ctx->Color.Blend[buf].EquationA == modeA)
+      return;  /* no change */
+
+   FLUSH_VERTICES(ctx, _NEW_COLOR);
+   ctx->Color.Blend[buf].EquationRGB = modeRGB;
+   ctx->Color.Blend[buf].EquationA = modeA;
+   ctx->Color._BlendEquationPerBuffer = GL_TRUE;
+
+   if (ctx->Driver.BlendEquationSeparatei)
+      ctx->Driver.BlendEquationSeparatei(ctx, buf, modeRGB, modeA);
+}
+
+
+
+#endif /* _HAVE_FULL_GL */
 
 
 /**
@@ -593,6 +774,8 @@ _mesa_ClampColorARB(GLenum target, GLenum clamp)
  */
 void _mesa_init_color( struct gl_context * ctx )
 {
+   GLuint i;
+
    /* Color buffer group */
    ctx->Color.IndexMask = ~0u;
    memset(ctx->Color.ColorMask, 0xff, sizeof(ctx->Color.ColorMask));
@@ -602,12 +785,14 @@ void _mesa_init_color( struct gl_context * ctx )
    ctx->Color.AlphaFunc = GL_ALWAYS;
    ctx->Color.AlphaRef = 0;
    ctx->Color.BlendEnabled = 0x0;
-   ctx->Color.BlendSrcRGB = GL_ONE;
-   ctx->Color.BlendDstRGB = GL_ZERO;
-   ctx->Color.BlendSrcA = GL_ONE;
-   ctx->Color.BlendDstA = GL_ZERO;
-   ctx->Color.BlendEquationRGB = GL_FUNC_ADD;
-   ctx->Color.BlendEquationA = GL_FUNC_ADD;
+   for (i = 0; i < Elements(ctx->Color.Blend); i++) {
+      ctx->Color.Blend[i].SrcRGB = GL_ONE;
+      ctx->Color.Blend[i].DstRGB = GL_ZERO;
+      ctx->Color.Blend[i].SrcA = GL_ONE;
+      ctx->Color.Blend[i].DstA = GL_ZERO;
+      ctx->Color.Blend[i].EquationRGB = GL_FUNC_ADD;
+      ctx->Color.Blend[i].EquationA = GL_FUNC_ADD;
+   }
    ASSIGN_4V( ctx->Color.BlendColor, 0.0, 0.0, 0.0, 0.0 );
    ctx->Color.IndexLogicOpEnabled = GL_FALSE;
    ctx->Color.ColorLogicOpEnabled = GL_FALSE;