xserver and mesa git update 28-12-2010

1 files changed, 629 insertions, 631 deletions

diff --git a/mesalib/src/mesa/main/blend.c b/mesalib/src/mesa/main/blend.c
index d022770f2..10e384a40 100644
--- a/mesalib/src/mesa/main/blend.c
+++ b/mesalib/src/mesa/main/blend.c
@@ -1,631 +1,629 @@
-/**
- * \file blend.c
- * Blending operations.
- */
-
-/*
- * Mesa 3-D graphics library
- * Version:  6.5.1
- *
- * Copyright (C) 1999-2006  Brian Paul   All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-
-
-#include "glheader.h"
-#include "blend.h"
-#include "context.h"
-#include "enums.h"
-#include "macros.h"
-#include "mtypes.h"
-
-
-/**
- * Specify the blending operation.
- *
- * \param sfactor source factor operator.
- * \param dfactor destination factor operator.
- *
- * \sa glBlendFunc, glBlendFuncSeparateEXT
- */
-void GLAPIENTRY
-_mesa_BlendFunc( GLenum sfactor, GLenum dfactor )
-{
-   _mesa_BlendFuncSeparateEXT(sfactor, dfactor, sfactor, dfactor);
-}
-
-
-/**
- * Process GL_EXT_blend_func_separate().
- *
- * \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 )
-{
-   GET_CURRENT_CONTEXT(ctx);
-   ASSERT_OUTSIDE_BEGIN_END(ctx);
-
-   if (MESA_VERBOSE & VERBOSE_API)
-      _mesa_debug(ctx, "glBlendFuncSeparate %s %s %s %s\n",
-                  _mesa_lookup_enum_by_nr(sfactorRGB),
-                  _mesa_lookup_enum_by_nr(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;
-   }
-
-   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:
-         break;
-      default:
-         _mesa_error(ctx, GL_INVALID_ENUM, "glBlendFunc or glBlendFuncSeparate (dfactorRGB)");
-         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;
-   }
-
-   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->Color.BlendSrcRGB == sfactorRGB &&
-       ctx->Color.BlendDstRGB == dfactorRGB &&
-       ctx->Color.BlendSrcA == sfactorA &&
-       ctx->Color.BlendDstA == dfactorA)
-      return;
-
-   FLUSH_VERTICES(ctx, _NEW_COLOR);
-
-   ctx->Color.BlendSrcRGB = sfactorRGB;
-   ctx->Color.BlendDstRGB = dfactorRGB;
-   ctx->Color.BlendSrcA = sfactorA;
-   ctx->Color.BlendDstA = dfactorA;
-
-   if (ctx->Driver.BlendFuncSeparate) {
-      (*ctx->Driver.BlendFuncSeparate)( ctx, sfactorRGB, dfactorRGB,
-					sfactorA, dfactorA );
-   }
-}
-
-
-#if _HAVE_FULL_GL
-
-static GLboolean
-_mesa_validate_blend_equation( GLcontext *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 &&
-             !ctx->Extensions.ARB_imaging) {
-            return GL_FALSE;
-         }
-         break;
-      /* 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 &&
-             !ctx->Extensions.ARB_imaging) {
-            return GL_FALSE;
-         }
-         break;
-      default:
-         return GL_FALSE;
-   }
-
-   return GL_TRUE;
-}
-
-
-/* This is really an extension function! */
-void GLAPIENTRY
-_mesa_BlendEquation( GLenum mode )
-{
-   GET_CURRENT_CONTEXT(ctx);
-   ASSERT_OUTSIDE_BEGIN_END(ctx);
-
-   if (MESA_VERBOSE & VERBOSE_API)
-      _mesa_debug(ctx, "glBlendEquation %s\n",
-                  _mesa_lookup_enum_by_nr(mode));
-
-   if ( ! _mesa_validate_blend_equation( ctx, mode, GL_FALSE ) ) {
-      _mesa_error(ctx, GL_INVALID_ENUM, "glBlendEquation");
-      return;
-   }
-
-   if ( (ctx->Color.BlendEquationRGB == mode) &&
-	(ctx->Color.BlendEquationA == mode) )
-      return;
-
-   FLUSH_VERTICES(ctx, _NEW_COLOR);
-   ctx->Color.BlendEquationRGB = mode;
-   ctx->Color.BlendEquationA = mode;
-
-   if (ctx->Driver.BlendEquationSeparate)
-      (*ctx->Driver.BlendEquationSeparate)( ctx, mode, mode );
-}
-
-
-void GLAPIENTRY
-_mesa_BlendEquationSeparateEXT( GLenum modeRGB, GLenum modeA )
-{
-   GET_CURRENT_CONTEXT(ctx);
-   ASSERT_OUTSIDE_BEGIN_END(ctx);
-
-   if (MESA_VERBOSE & VERBOSE_API)
-      _mesa_debug(ctx, "glBlendEquationSeparateEXT %s %s\n",
-                  _mesa_lookup_enum_by_nr(modeRGB),
-                  _mesa_lookup_enum_by_nr(modeA));
-
-   if ( (modeRGB != modeA) && !ctx->Extensions.EXT_blend_equation_separate ) {
-      _mesa_error(ctx, GL_INVALID_OPERATION,
-		  "glBlendEquationSeparateEXT not supported by driver");
-      return;
-   }
-
-   if ( ! _mesa_validate_blend_equation( ctx, modeRGB, GL_TRUE ) ) {
-      _mesa_error(ctx, GL_INVALID_ENUM, "glBlendEquationSeparateEXT(modeRGB)");
-      return;
-   }
-
-   if ( ! _mesa_validate_blend_equation( ctx, modeA, GL_TRUE ) ) {
-      _mesa_error(ctx, GL_INVALID_ENUM, "glBlendEquationSeparateEXT(modeA)");
-      return;
-   }
-
-
-   if ( (ctx->Color.BlendEquationRGB == modeRGB) &&
-	(ctx->Color.BlendEquationA == modeA) )
-      return;
-
-   FLUSH_VERTICES(ctx, _NEW_COLOR);
-   ctx->Color.BlendEquationRGB = modeRGB;
-   ctx->Color.BlendEquationA = modeA;
-
-   if (ctx->Driver.BlendEquationSeparate)
-      (*ctx->Driver.BlendEquationSeparate)( ctx, modeRGB, modeA );
-}
-#endif
-
-
-/**
- * Set the blending color.
- *
- * \param red red color component.
- * \param green green color component.
- * \param blue blue color component.
- * \param alpha alpha color component.
- *
- * \sa glBlendColor().
- *
- * Clamps the parameters and updates gl_colorbuffer_attrib::BlendColor.  On a
- * change, flushes the vertices and notifies the driver via
- * dd_function_table::BlendColor callback.
- */
-void GLAPIENTRY
-_mesa_BlendColor( GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha )
-{
-   GLfloat tmp[4];
-   GET_CURRENT_CONTEXT(ctx);
-   ASSERT_OUTSIDE_BEGIN_END(ctx);
-
-   tmp[0] = CLAMP( red,   0.0F, 1.0F );
-   tmp[1] = CLAMP( green, 0.0F, 1.0F );
-   tmp[2] = CLAMP( blue,  0.0F, 1.0F );
-   tmp[3] = CLAMP( alpha, 0.0F, 1.0F );
-
-   if (TEST_EQ_4V(tmp, ctx->Color.BlendColor))
-      return;
-
-   FLUSH_VERTICES(ctx, _NEW_COLOR);
-   COPY_4FV( ctx->Color.BlendColor, tmp );
-
-   if (ctx->Driver.BlendColor)
-      (*ctx->Driver.BlendColor)(ctx, tmp);
-}
-
-
-/**
- * Specify the alpha test function.
- *
- * \param func alpha comparison function.
- * \param ref reference value.
- *
- * Verifies the parameters and updates gl_colorbuffer_attrib. 
- * On a change, flushes the vertices and notifies the driver via
- * dd_function_table::AlphaFunc callback.
- */
-void GLAPIENTRY
-_mesa_AlphaFunc( GLenum func, GLclampf ref )
-{
-   GET_CURRENT_CONTEXT(ctx);
-   ASSERT_OUTSIDE_BEGIN_END(ctx);
-
-   switch (func) {
-   case GL_NEVER:
-   case GL_LESS:
-   case GL_EQUAL:
-   case GL_LEQUAL:
-   case GL_GREATER:
-   case GL_NOTEQUAL:
-   case GL_GEQUAL:
-   case GL_ALWAYS:
-      ref = CLAMP(ref, 0.0F, 1.0F);
-
-      if (ctx->Color.AlphaFunc == func && ctx->Color.AlphaRef == ref)
-         return; /* no change */
-
-      FLUSH_VERTICES(ctx, _NEW_COLOR);
-      ctx->Color.AlphaFunc = func;
-      ctx->Color.AlphaRef = ref;
-
-      if (ctx->Driver.AlphaFunc)
-         ctx->Driver.AlphaFunc(ctx, func, ref);
-      return;
-
-   default:
-      _mesa_error( ctx, GL_INVALID_ENUM, "glAlphaFunc(func)" );
-      return;
-   }
-}
-
-
-/**
- * Specify a logic pixel operation for color index rendering.
- *
- * \param opcode operation.
- *
- * Verifies that \p opcode is a valid enum and updates
-gl_colorbuffer_attrib::LogicOp.
- * On a change, flushes the vertices and notifies the driver via the
- * dd_function_table::LogicOpcode callback.
- */
-void GLAPIENTRY
-_mesa_LogicOp( GLenum opcode )
-{
-   GET_CURRENT_CONTEXT(ctx);
-   ASSERT_OUTSIDE_BEGIN_END(ctx);
-
-   switch (opcode) {
-      case GL_CLEAR:
-      case GL_SET:
-      case GL_COPY:
-      case GL_COPY_INVERTED:
-      case GL_NOOP:
-      case GL_INVERT:
-      case GL_AND:
-      case GL_NAND:
-      case GL_OR:
-      case GL_NOR:
-      case GL_XOR:
-      case GL_EQUIV:
-      case GL_AND_REVERSE:
-      case GL_AND_INVERTED:
-      case GL_OR_REVERSE:
-      case GL_OR_INVERTED:
-	 break;
-      default:
-         _mesa_error( ctx, GL_INVALID_ENUM, "glLogicOp" );
-	 return;
-   }
-
-   if (ctx->Color.LogicOp == opcode)
-      return;
-
-   FLUSH_VERTICES(ctx, _NEW_COLOR);
-   ctx->Color.LogicOp = opcode;
-
-   if (ctx->Driver.LogicOpcode)
-      ctx->Driver.LogicOpcode( ctx, opcode );
-}
-
-#if _HAVE_FULL_GL
-void GLAPIENTRY
-_mesa_IndexMask( GLuint mask )
-{
-   GET_CURRENT_CONTEXT(ctx);
-   ASSERT_OUTSIDE_BEGIN_END(ctx);
-
-   if (ctx->Color.IndexMask == mask)
-      return;
-
-   FLUSH_VERTICES(ctx, _NEW_COLOR);
-   ctx->Color.IndexMask = mask;
-}
-#endif
-
-
-/**
- * Enable or disable writing of frame buffer color components.
- *
- * \param red whether to mask writing of the red color component.
- * \param green whether to mask writing of the green color component.
- * \param blue whether to mask writing of the blue color component.
- * \param alpha whether to mask writing of the alpha color component.
- *
- * \sa glColorMask().
- *
- * Sets the appropriate value of gl_colorbuffer_attrib::ColorMask.  On a
- * change, flushes the vertices and notifies the driver via the
- * dd_function_table::ColorMask callback.
- */
-void GLAPIENTRY
-_mesa_ColorMask( GLboolean red, GLboolean green,
-                 GLboolean blue, GLboolean alpha )
-{
-   GET_CURRENT_CONTEXT(ctx);
-   GLubyte tmp[4];
-   GLuint i;
-   GLboolean flushed;
-   ASSERT_OUTSIDE_BEGIN_END(ctx);
-
-   if (MESA_VERBOSE & VERBOSE_API)
-      _mesa_debug(ctx, "glColorMask %d %d %d %d\n", red, green, blue, alpha);
-
-   /* Shouldn't have any information about channel depth in core mesa
-    * -- should probably store these as the native booleans:
-    */
-   tmp[RCOMP] = red    ? 0xff : 0x0;
-   tmp[GCOMP] = green  ? 0xff : 0x0;
-   tmp[BCOMP] = blue   ? 0xff : 0x0;
-   tmp[ACOMP] = alpha  ? 0xff : 0x0;
-
-   flushed = GL_FALSE;
-   for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
-      if (!TEST_EQ_4V(tmp, ctx->Color.ColorMask[i])) {
-         if (!flushed) {
-            FLUSH_VERTICES(ctx, _NEW_COLOR);
-         }
-         flushed = GL_TRUE;
-         COPY_4UBV(ctx->Color.ColorMask[i], tmp);
-      }
-   }
-
-   if (ctx->Driver.ColorMask)
-      ctx->Driver.ColorMask( ctx, red, green, blue, alpha );
-}
-
-
-/**
- * For GL_EXT_draw_buffers2 and GL3
- */
-void GLAPIENTRY
-_mesa_ColorMaskIndexed( GLuint buf, GLboolean red, GLboolean green,
-                        GLboolean blue, GLboolean alpha )
-{
-   GLubyte tmp[4];
-   GET_CURRENT_CONTEXT(ctx);
-   ASSERT_OUTSIDE_BEGIN_END(ctx);
-
-   if (MESA_VERBOSE & VERBOSE_API)
-      _mesa_debug(ctx, "glColorMaskIndexed %u %d %d %d %d\n",
-                  buf, red, green, blue, alpha);
-
-   if (buf >= ctx->Const.MaxDrawBuffers) {
-      _mesa_error(ctx, GL_INVALID_VALUE, "glColorMaskIndexed(buf=%u)", buf);
-      return;
-   }
-
-   /* Shouldn't have any information about channel depth in core mesa
-    * -- should probably store these as the native booleans:
-    */
-   tmp[RCOMP] = red    ? 0xff : 0x0;
-   tmp[GCOMP] = green  ? 0xff : 0x0;
-   tmp[BCOMP] = blue   ? 0xff : 0x0;
-   tmp[ACOMP] = alpha  ? 0xff : 0x0;
-
-   if (TEST_EQ_4V(tmp, ctx->Color.ColorMask[buf]))
-      return;
-
-   FLUSH_VERTICES(ctx, _NEW_COLOR);
-   COPY_4UBV(ctx->Color.ColorMask[buf], tmp);
-
-   if (ctx->Driver.ColorMaskIndexed)
-      ctx->Driver.ColorMaskIndexed(ctx, buf, red, green, blue, alpha);
-}
-
-
-extern void GLAPIENTRY
-_mesa_ClampColorARB(GLenum target, GLenum clamp)
-{
-   GET_CURRENT_CONTEXT(ctx);
-
-   ASSERT_OUTSIDE_BEGIN_END(ctx);
-
-   if (clamp != GL_TRUE && clamp != GL_FALSE && clamp != GL_FIXED_ONLY_ARB) {
-      _mesa_error(ctx, GL_INVALID_ENUM, "glClampColorARB(clamp)");
-      return;
-   }
-
-   switch (target) {
-   case GL_CLAMP_VERTEX_COLOR_ARB:
-      ctx->Light.ClampVertexColor = clamp;
-      break;
-   case GL_CLAMP_FRAGMENT_COLOR_ARB:
-      ctx->Color.ClampFragmentColor = clamp;
-      break;
-   case GL_CLAMP_READ_COLOR_ARB:
-      ctx->Color.ClampReadColor = clamp;
-      break;
-   default:
-      _mesa_error(ctx, GL_INVALID_ENUM, "glClampColorARB(target)");
-      return;
-   }
-}
-
-
-
-
-/**********************************************************************/
-/** \name Initialization */
-/*@{*/
-
-/**
- * Initialization of the context's Color attribute group.
- *
- * \param ctx GL context.
- *
- * Initializes the related fields in the context color attribute group,
- * __GLcontextRec::Color.
- */
-void _mesa_init_color( GLcontext * ctx )
-{
-   /* Color buffer group */
-   ctx->Color.IndexMask = ~0u;
-   memset(ctx->Color.ColorMask, 0xff, sizeof(ctx->Color.ColorMask));
-   ctx->Color.ClearIndex = 0;
-   ASSIGN_4V( ctx->Color.ClearColor, 0, 0, 0, 0 );
-   ctx->Color.AlphaEnabled = GL_FALSE;
-   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;
-   ASSIGN_4V( ctx->Color.BlendColor, 0.0, 0.0, 0.0, 0.0 );
-   ctx->Color.IndexLogicOpEnabled = GL_FALSE;
-   ctx->Color.ColorLogicOpEnabled = GL_FALSE;
-   ctx->Color._LogicOpEnabled = GL_FALSE;
-   ctx->Color.LogicOp = GL_COPY;
-   ctx->Color.DitherFlag = GL_TRUE;
-
-   if (ctx->Visual.doubleBufferMode) {
-      ctx->Color.DrawBuffer[0] = GL_BACK;
-   }
-   else {
-      ctx->Color.DrawBuffer[0] = GL_FRONT;
-   }
-
-   ctx->Color.ClampFragmentColor = GL_FIXED_ONLY_ARB;
-   ctx->Color.ClampReadColor = GL_FIXED_ONLY_ARB;
-}
-
-/*@}*/
+/**

+ * \file blend.c

+ * Blending operations.

+ */

+

+/*

+ * Mesa 3-D graphics library

+ * Version:  6.5.1

+ *

+ * Copyright (C) 1999-2006  Brian Paul   All Rights Reserved.

+ *

+ * Permission is hereby granted, free of charge, to any person obtaining a

+ * copy of this software and associated documentation files (the "Software"),

+ * to deal in the Software without restriction, including without limitation

+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,

+ * and/or sell copies of the Software, and to permit persons to whom the

+ * Software is furnished to do so, subject to the following conditions:

+ *

+ * The above copyright notice and this permission notice shall be included

+ * in all copies or substantial portions of the Software.

+ *

+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL

+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN

+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN

+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

+ */

+

+

+

+#include "glheader.h"

+#include "blend.h"

+#include "context.h"

+#include "enums.h"

+#include "macros.h"

+#include "mtypes.h"

+

+

+/**

+ * Specify the blending operation.

+ *

+ * \param sfactor source factor operator.

+ * \param dfactor destination factor operator.

+ *

+ * \sa glBlendFunc, glBlendFuncSeparateEXT

+ */

+void GLAPIENTRY

+_mesa_BlendFunc( GLenum sfactor, GLenum dfactor )

+{

+   _mesa_BlendFuncSeparateEXT(sfactor, dfactor, sfactor, dfactor);

+}

+

+

+/**

+ * Process GL_EXT_blend_func_separate().

+ *

+ * \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 )

+{

+   GET_CURRENT_CONTEXT(ctx);

+   ASSERT_OUTSIDE_BEGIN_END(ctx);

+

+   if (MESA_VERBOSE & VERBOSE_API)

+      _mesa_debug(ctx, "glBlendFuncSeparate %s %s %s %s\n",

+                  _mesa_lookup_enum_by_nr(sfactorRGB),

+                  _mesa_lookup_enum_by_nr(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;

+   }

+

+   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:

+         break;

+      default:

+         _mesa_error(ctx, GL_INVALID_ENUM, "glBlendFunc or glBlendFuncSeparate (dfactorRGB)");

+         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;

+   }

+

+   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->Color.BlendSrcRGB == sfactorRGB &&

+       ctx->Color.BlendDstRGB == dfactorRGB &&

+       ctx->Color.BlendSrcA == sfactorA &&

+       ctx->Color.BlendDstA == dfactorA)

+      return;

+

+   FLUSH_VERTICES(ctx, _NEW_COLOR);

+

+   ctx->Color.BlendSrcRGB = sfactorRGB;

+   ctx->Color.BlendDstRGB = dfactorRGB;

+   ctx->Color.BlendSrcA = sfactorA;

+   ctx->Color.BlendDstA = dfactorA;

+

+   if (ctx->Driver.BlendFuncSeparate) {

+      (*ctx->Driver.BlendFuncSeparate)( ctx, sfactorRGB, dfactorRGB,

+					sfactorA, dfactorA );

+   }

+}

+

+

+#if _HAVE_FULL_GL

+

+static GLboolean

+_mesa_validate_blend_equation( 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;

+      /* 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 GL_TRUE;

+}

+

+

+/* This is really an extension function! */

+void GLAPIENTRY

+_mesa_BlendEquation( GLenum mode )

+{

+   GET_CURRENT_CONTEXT(ctx);

+   ASSERT_OUTSIDE_BEGIN_END(ctx);

+

+   if (MESA_VERBOSE & VERBOSE_API)

+      _mesa_debug(ctx, "glBlendEquation %s\n",

+                  _mesa_lookup_enum_by_nr(mode));

+

+   if ( ! _mesa_validate_blend_equation( ctx, mode, GL_FALSE ) ) {

+      _mesa_error(ctx, GL_INVALID_ENUM, "glBlendEquation");

+      return;

+   }

+

+   if ( (ctx->Color.BlendEquationRGB == mode) &&

+	(ctx->Color.BlendEquationA == mode) )

+      return;

+

+   FLUSH_VERTICES(ctx, _NEW_COLOR);

+   ctx->Color.BlendEquationRGB = mode;

+   ctx->Color.BlendEquationA = mode;

+

+   if (ctx->Driver.BlendEquationSeparate)

+      (*ctx->Driver.BlendEquationSeparate)( ctx, mode, mode );

+}

+

+

+void GLAPIENTRY

+_mesa_BlendEquationSeparateEXT( GLenum modeRGB, GLenum modeA )

+{

+   GET_CURRENT_CONTEXT(ctx);

+   ASSERT_OUTSIDE_BEGIN_END(ctx);

+

+   if (MESA_VERBOSE & VERBOSE_API)

+      _mesa_debug(ctx, "glBlendEquationSeparateEXT %s %s\n",

+                  _mesa_lookup_enum_by_nr(modeRGB),

+                  _mesa_lookup_enum_by_nr(modeA));

+

+   if ( (modeRGB != modeA) && !ctx->Extensions.EXT_blend_equation_separate ) {

+      _mesa_error(ctx, GL_INVALID_OPERATION,

+		  "glBlendEquationSeparateEXT not supported by driver");

+      return;

+   }

+

+   if ( ! _mesa_validate_blend_equation( ctx, modeRGB, GL_TRUE ) ) {

+      _mesa_error(ctx, GL_INVALID_ENUM, "glBlendEquationSeparateEXT(modeRGB)");

+      return;

+   }

+

+   if ( ! _mesa_validate_blend_equation( ctx, modeA, GL_TRUE ) ) {

+      _mesa_error(ctx, GL_INVALID_ENUM, "glBlendEquationSeparateEXT(modeA)");

+      return;

+   }

+

+

+   if ( (ctx->Color.BlendEquationRGB == modeRGB) &&

+	(ctx->Color.BlendEquationA == modeA) )

+      return;

+

+   FLUSH_VERTICES(ctx, _NEW_COLOR);

+   ctx->Color.BlendEquationRGB = modeRGB;

+   ctx->Color.BlendEquationA = modeA;

+

+   if (ctx->Driver.BlendEquationSeparate)

+      (*ctx->Driver.BlendEquationSeparate)( ctx, modeRGB, modeA );

+}

+#endif

+

+

+/**

+ * Set the blending color.

+ *

+ * \param red red color component.

+ * \param green green color component.

+ * \param blue blue color component.

+ * \param alpha alpha color component.

+ *

+ * \sa glBlendColor().

+ *

+ * Clamps the parameters and updates gl_colorbuffer_attrib::BlendColor.  On a

+ * change, flushes the vertices and notifies the driver via

+ * dd_function_table::BlendColor callback.

+ */

+void GLAPIENTRY

+_mesa_BlendColor( GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha )

+{

+   GLfloat tmp[4];

+   GET_CURRENT_CONTEXT(ctx);

+   ASSERT_OUTSIDE_BEGIN_END(ctx);

+

+   tmp[0] = CLAMP( red,   0.0F, 1.0F );

+   tmp[1] = CLAMP( green, 0.0F, 1.0F );

+   tmp[2] = CLAMP( blue,  0.0F, 1.0F );

+   tmp[3] = CLAMP( alpha, 0.0F, 1.0F );

+

+   if (TEST_EQ_4V(tmp, ctx->Color.BlendColor))

+      return;

+

+   FLUSH_VERTICES(ctx, _NEW_COLOR);

+   COPY_4FV( ctx->Color.BlendColor, tmp );

+

+   if (ctx->Driver.BlendColor)

+      (*ctx->Driver.BlendColor)(ctx, tmp);

+}

+

+

+/**

+ * Specify the alpha test function.

+ *

+ * \param func alpha comparison function.

+ * \param ref reference value.

+ *

+ * Verifies the parameters and updates gl_colorbuffer_attrib. 

+ * On a change, flushes the vertices and notifies the driver via

+ * dd_function_table::AlphaFunc callback.

+ */

+void GLAPIENTRY

+_mesa_AlphaFunc( GLenum func, GLclampf ref )

+{

+   GET_CURRENT_CONTEXT(ctx);

+   ASSERT_OUTSIDE_BEGIN_END(ctx);

+

+   switch (func) {

+   case GL_NEVER:

+   case GL_LESS:

+   case GL_EQUAL:

+   case GL_LEQUAL:

+   case GL_GREATER:

+   case GL_NOTEQUAL:

+   case GL_GEQUAL:

+   case GL_ALWAYS:

+      ref = CLAMP(ref, 0.0F, 1.0F);

+

+      if (ctx->Color.AlphaFunc == func && ctx->Color.AlphaRef == ref)

+         return; /* no change */

+

+      FLUSH_VERTICES(ctx, _NEW_COLOR);

+      ctx->Color.AlphaFunc = func;

+      ctx->Color.AlphaRef = ref;

+

+      if (ctx->Driver.AlphaFunc)

+         ctx->Driver.AlphaFunc(ctx, func, ref);

+      return;

+

+   default:

+      _mesa_error( ctx, GL_INVALID_ENUM, "glAlphaFunc(func)" );

+      return;

+   }

+}

+

+

+/**

+ * Specify a logic pixel operation for color index rendering.

+ *

+ * \param opcode operation.

+ *

+ * Verifies that \p opcode is a valid enum and updates

+gl_colorbuffer_attrib::LogicOp.

+ * On a change, flushes the vertices and notifies the driver via the

+ * dd_function_table::LogicOpcode callback.

+ */

+void GLAPIENTRY

+_mesa_LogicOp( GLenum opcode )

+{

+   GET_CURRENT_CONTEXT(ctx);

+   ASSERT_OUTSIDE_BEGIN_END(ctx);

+

+   switch (opcode) {

+      case GL_CLEAR:

+      case GL_SET:

+      case GL_COPY:

+      case GL_COPY_INVERTED:

+      case GL_NOOP:

+      case GL_INVERT:

+      case GL_AND:

+      case GL_NAND:

+      case GL_OR:

+      case GL_NOR:

+      case GL_XOR:

+      case GL_EQUIV:

+      case GL_AND_REVERSE:

+      case GL_AND_INVERTED:

+      case GL_OR_REVERSE:

+      case GL_OR_INVERTED:

+	 break;

+      default:

+         _mesa_error( ctx, GL_INVALID_ENUM, "glLogicOp" );

+	 return;

+   }

+

+   if (ctx->Color.LogicOp == opcode)

+      return;

+

+   FLUSH_VERTICES(ctx, _NEW_COLOR);

+   ctx->Color.LogicOp = opcode;

+

+   if (ctx->Driver.LogicOpcode)

+      ctx->Driver.LogicOpcode( ctx, opcode );

+}

+

+#if _HAVE_FULL_GL

+void GLAPIENTRY

+_mesa_IndexMask( GLuint mask )

+{

+   GET_CURRENT_CONTEXT(ctx);

+   ASSERT_OUTSIDE_BEGIN_END(ctx);

+

+   if (ctx->Color.IndexMask == mask)

+      return;

+

+   FLUSH_VERTICES(ctx, _NEW_COLOR);

+   ctx->Color.IndexMask = mask;

+}

+#endif

+

+

+/**

+ * Enable or disable writing of frame buffer color components.

+ *

+ * \param red whether to mask writing of the red color component.

+ * \param green whether to mask writing of the green color component.

+ * \param blue whether to mask writing of the blue color component.

+ * \param alpha whether to mask writing of the alpha color component.

+ *

+ * \sa glColorMask().

+ *

+ * Sets the appropriate value of gl_colorbuffer_attrib::ColorMask.  On a

+ * change, flushes the vertices and notifies the driver via the

+ * dd_function_table::ColorMask callback.

+ */

+void GLAPIENTRY

+_mesa_ColorMask( GLboolean red, GLboolean green,

+                 GLboolean blue, GLboolean alpha )

+{

+   GET_CURRENT_CONTEXT(ctx);

+   GLubyte tmp[4];

+   GLuint i;

+   GLboolean flushed;

+   ASSERT_OUTSIDE_BEGIN_END(ctx);

+

+   if (MESA_VERBOSE & VERBOSE_API)

+      _mesa_debug(ctx, "glColorMask %d %d %d %d\n", red, green, blue, alpha);

+

+   /* Shouldn't have any information about channel depth in core mesa

+    * -- should probably store these as the native booleans:

+    */

+   tmp[RCOMP] = red    ? 0xff : 0x0;

+   tmp[GCOMP] = green  ? 0xff : 0x0;

+   tmp[BCOMP] = blue   ? 0xff : 0x0;

+   tmp[ACOMP] = alpha  ? 0xff : 0x0;

+

+   flushed = GL_FALSE;

+   for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {

+      if (!TEST_EQ_4V(tmp, ctx->Color.ColorMask[i])) {

+         if (!flushed) {

+            FLUSH_VERTICES(ctx, _NEW_COLOR);

+         }

+         flushed = GL_TRUE;

+         COPY_4UBV(ctx->Color.ColorMask[i], tmp);

+      }

+   }

+

+   if (ctx->Driver.ColorMask)

+      ctx->Driver.ColorMask( ctx, red, green, blue, alpha );

+}

+

+

+/**

+ * For GL_EXT_draw_buffers2 and GL3

+ */

+void GLAPIENTRY

+_mesa_ColorMaskIndexed( GLuint buf, GLboolean red, GLboolean green,

+                        GLboolean blue, GLboolean alpha )

+{

+   GLubyte tmp[4];

+   GET_CURRENT_CONTEXT(ctx);

+   ASSERT_OUTSIDE_BEGIN_END(ctx);

+

+   if (MESA_VERBOSE & VERBOSE_API)

+      _mesa_debug(ctx, "glColorMaskIndexed %u %d %d %d %d\n",

+                  buf, red, green, blue, alpha);

+

+   if (buf >= ctx->Const.MaxDrawBuffers) {

+      _mesa_error(ctx, GL_INVALID_VALUE, "glColorMaskIndexed(buf=%u)", buf);

+      return;

+   }

+

+   /* Shouldn't have any information about channel depth in core mesa

+    * -- should probably store these as the native booleans:

+    */

+   tmp[RCOMP] = red    ? 0xff : 0x0;

+   tmp[GCOMP] = green  ? 0xff : 0x0;

+   tmp[BCOMP] = blue   ? 0xff : 0x0;

+   tmp[ACOMP] = alpha  ? 0xff : 0x0;

+

+   if (TEST_EQ_4V(tmp, ctx->Color.ColorMask[buf]))

+      return;

+

+   FLUSH_VERTICES(ctx, _NEW_COLOR);

+   COPY_4UBV(ctx->Color.ColorMask[buf], tmp);

+

+   if (ctx->Driver.ColorMaskIndexed)

+      ctx->Driver.ColorMaskIndexed(ctx, buf, red, green, blue, alpha);

+}

+

+

+extern void GLAPIENTRY

+_mesa_ClampColorARB(GLenum target, GLenum clamp)

+{

+   GET_CURRENT_CONTEXT(ctx);

+

+   ASSERT_OUTSIDE_BEGIN_END(ctx);

+

+   if (clamp != GL_TRUE && clamp != GL_FALSE && clamp != GL_FIXED_ONLY_ARB) {

+      _mesa_error(ctx, GL_INVALID_ENUM, "glClampColorARB(clamp)");

+      return;

+   }

+

+   switch (target) {

+   case GL_CLAMP_VERTEX_COLOR_ARB:

+      ctx->Light.ClampVertexColor = clamp;

+      break;

+   case GL_CLAMP_FRAGMENT_COLOR_ARB:

+      ctx->Color.ClampFragmentColor = clamp;

+      break;

+   case GL_CLAMP_READ_COLOR_ARB:

+      ctx->Color.ClampReadColor = clamp;

+      break;

+   default:

+      _mesa_error(ctx, GL_INVALID_ENUM, "glClampColorARB(target)");

+      return;

+   }

+}

+

+

+

+

+/**********************************************************************/

+/** \name Initialization */

+/*@{*/

+

+/**

+ * Initialization of the context's Color attribute group.

+ *

+ * \param ctx GL context.

+ *

+ * Initializes the related fields in the context color attribute group,

+ * __struct gl_contextRec::Color.

+ */

+void _mesa_init_color( struct gl_context * ctx )

+{

+   /* Color buffer group */

+   ctx->Color.IndexMask = ~0u;

+   memset(ctx->Color.ColorMask, 0xff, sizeof(ctx->Color.ColorMask));

+   ctx->Color.ClearIndex = 0;

+   ASSIGN_4V( ctx->Color.ClearColor, 0, 0, 0, 0 );

+   ctx->Color.AlphaEnabled = GL_FALSE;

+   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;

+   ASSIGN_4V( ctx->Color.BlendColor, 0.0, 0.0, 0.0, 0.0 );

+   ctx->Color.IndexLogicOpEnabled = GL_FALSE;

+   ctx->Color.ColorLogicOpEnabled = GL_FALSE;

+   ctx->Color._LogicOpEnabled = GL_FALSE;

+   ctx->Color.LogicOp = GL_COPY;

+   ctx->Color.DitherFlag = GL_TRUE;

+

+   if (ctx->Visual.doubleBufferMode) {

+      ctx->Color.DrawBuffer[0] = GL_BACK;

+   }

+   else {

+      ctx->Color.DrawBuffer[0] = GL_FRONT;

+   }

+

+   ctx->Color.ClampFragmentColor = GL_FIXED_ONLY_ARB;

+   ctx->Color.ClampReadColor = GL_FIXED_ONLY_ARB;

+}

+

+/*@}*/