libxtrans libXmu libXext mesa pixman git update 15 sept 2011

20 files changed, 2006 insertions, 1996 deletions

diff --git a/mesalib/src/glsl/ast_to_hir.cpp b/mesalib/src/glsl/ast_to_hir.cpp
index 484786c5f..ce29d5a87 100644
--- a/mesalib/src/glsl/ast_to_hir.cpp
+++ b/mesalib/src/glsl/ast_to_hir.cpp
@@ -2120,25 +2120,6 @@ apply_type_qualifier_to_variable(const struct ast_type_qualifier *qual,
        var->depth_layout = ir_depth_layout_unchanged;
    else
        var->depth_layout = ir_depth_layout_none;
-
-   /* From page 46 (page 52 of the PDF) of the GLSL ES specification:
-    *
-    *    "Array variables are l-values and may be passed to parameters
-    *     declared as out or inout. However, they may not be used as
-    *     the target of an assignment."
-    *
-    * From page 32 (page 38 of the PDF) of the GLSL 1.10 spec:
-    *
-    *    "Other binary or unary expressions, non-dereferenced arrays,
-    *     function names, swizzles with repeated fields, and constants
-    *     cannot be l-values."
-    *
-    * So we only mark 1.10 as non-lvalues, and check for array
-    * assignment in 100 specifically in do_assignment.
-    */
-   if (var->type->is_array() && state->language_version != 110) {
-      var->array_lvalue = true;
-   }
 }
 
 /**
@@ -2953,6 +2934,26 @@ ast_parameter_declarator::hir(exec_list *instructions,
       type = glsl_type::error_type;
    }
 
+   /* From page 39 (page 45 of the PDF) of the GLSL 1.10 spec:
+    *
+    *    "When calling a function, expressions that do not evaluate to
+    *     l-values cannot be passed to parameters declared as out or inout."
+    *
+    * From page 32 (page 38 of the PDF) of the GLSL 1.10 spec:
+    *
+    *    "Other binary or unary expressions, non-dereferenced arrays,
+    *     function names, swizzles with repeated fields, and constants
+    *     cannot be l-values."
+    *
+    * So for GLSL 1.10, passing an array as an out or inout parameter is not
+    * allowed.  This restriction is removed in GLSL 1.20, and in GLSL ES.
+    */
+   if ((var->mode == ir_var_inout || var->mode == ir_var_out)
+       && type->is_array() && state->language_version == 110) {
+      _mesa_glsl_error(&loc, state, "Arrays cannot be out or inout parameters in GLSL 1.10");
+      type = glsl_type::error_type;
+   }
+
    instructions->push_tail(var);
 
    /* Parameter declarations do not have r-values.
diff --git a/mesalib/src/glsl/ir.cpp b/mesalib/src/glsl/ir.cpp
index 41ed4f114..d6594cd9a 100644
--- a/mesalib/src/glsl/ir.cpp
+++ b/mesalib/src/glsl/ir.cpp
@@ -1105,9 +1105,6 @@ ir_dereference::is_lvalue() const
    if ((var == NULL) || var->read_only)
       return false;
 
-   if (this->type->is_array() && !var->array_lvalue)
-      return false;
-
    /* From page 17 (page 23 of the PDF) of the GLSL 1.20 spec:
     *
     *    "Samplers cannot be treated as l-values; hence cannot be used
@@ -1323,7 +1320,7 @@ ir_swizzle::variable_referenced() const
 ir_variable::ir_variable(const struct glsl_type *type, const char *name,
 			 ir_variable_mode mode)
    : max_array_access(0), read_only(false), centroid(false), invariant(false),
-     mode(mode), interpolation(ir_var_smooth), array_lvalue(false)
+     mode(mode), interpolation(ir_var_smooth)
 {
    this->ir_type = ir_type_variable;
    this->type = type;
diff --git a/mesalib/src/glsl/ir.h b/mesalib/src/glsl/ir.h
index 2e899f3ed..cc4e68002 100644
--- a/mesalib/src/glsl/ir.h
+++ b/mesalib/src/glsl/ir.h
@@ -346,14 +346,6 @@ public:
    unsigned interpolation:2;
 
    /**
-    * Flag that the whole array is assignable
-    *
-    * In GLSL 1.20 and later whole arrays are assignable (and comparable for
-    * equality).  This flag enables this behavior.
-    */
-   unsigned array_lvalue:1;
-
-   /**
     * \name ARB_fragment_coord_conventions
     * @{
     */
diff --git a/mesalib/src/glsl/ir_clone.cpp b/mesalib/src/glsl/ir_clone.cpp
index f0757365d..c1befa95c 100644
--- a/mesalib/src/glsl/ir_clone.cpp
+++ b/mesalib/src/glsl/ir_clone.cpp
@@ -47,7 +47,6 @@ ir_variable::clone(void *mem_ctx, struct hash_table *ht) const
    var->centroid = this->centroid;
    var->invariant = this->invariant;
    var->interpolation = this->interpolation;
-   var->array_lvalue = this->array_lvalue;
    var->location = this->location;
    var->warn_extension = this->warn_extension;
    var->origin_upper_left = this->origin_upper_left;
diff --git a/mesalib/src/mesa/drivers/common/meta.c b/mesalib/src/mesa/drivers/common/meta.c
index 2ebcd35bd..482bd98a2 100644
--- a/mesalib/src/mesa/drivers/common/meta.c
+++ b/mesalib/src/mesa/drivers/common/meta.c
@@ -1569,10 +1569,10 @@ _mesa_meta_Clear(struct gl_context *ctx, GLbitfield buffers)
 
       /* vertex colors */
       for (i = 0; i < 4; i++) {
-         verts[i].r = ctx->Color.ClearColorUnclamped[0];
-         verts[i].g = ctx->Color.ClearColorUnclamped[1];
-         verts[i].b = ctx->Color.ClearColorUnclamped[2];
-         verts[i].a = ctx->Color.ClearColorUnclamped[3];
+         verts[i].r = ctx->Color.ClearColor.f[0];
+         verts[i].g = ctx->Color.ClearColor.f[1];
+         verts[i].b = ctx->Color.ClearColor.f[2];
+         verts[i].a = ctx->Color.ClearColor.f[3];
       }
 
       /* upload new vertex data */
@@ -1679,7 +1679,7 @@ _mesa_meta_glsl_Clear(struct gl_context *ctx, GLbitfield buffers)
 
    _mesa_UseProgramObjectARB(clear->ShaderProg);
    _mesa_Uniform4fvARB(clear->ColorLocation, 1,
-		       ctx->Color.ClearColorUnclamped);
+		       ctx->Color.ClearColor.f);
 
    _mesa_BindVertexArray(clear->ArrayObj);
    _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, clear->VBO);
diff --git a/mesalib/src/mesa/drivers/dri/common/dri_util.c b/mesalib/src/mesa/drivers/dri/common/dri_util.c
index 6d6401934..cdd413737 100644
--- a/mesalib/src/mesa/drivers/dri/common/dri_util.c
+++ b/mesalib/src/mesa/drivers/dri/common/dri_util.c
@@ -816,8 +816,10 @@ driCreateNewScreen(int scrn,
 
     (void) loaderPrivate;
 
-    if (driDriverAPI.InitScreen == NULL)
+    if (driDriverAPI.InitScreen == NULL) {
+	__driUtilMessage("driver does not support DRI1");
 	return NULL;
+    }
 
     psp = calloc(1, sizeof *psp);
     if (!psp)
diff --git a/mesalib/src/mesa/drivers/windows/gdi/wmesa.c b/mesalib/src/mesa/drivers/windows/gdi/wmesa.c
index 35a150d06..14d15ed6c 100644
--- a/mesalib/src/mesa/drivers/windows/gdi/wmesa.c
+++ b/mesalib/src/mesa/drivers/windows/gdi/wmesa.c
@@ -249,14 +249,15 @@ static void wmesa_flush(struct gl_context *ctx)
 /*
  * Set the color used to clear the color buffer.
  */
-static void clear_color(struct gl_context *ctx, const GLfloat color[4])
+static void clear_color(struct gl_context *ctx,
+                        const union gl_color_union color)
 {
     WMesaContext pwc = wmesa_context(ctx);
     GLubyte col[3];
 
-    CLAMPED_FLOAT_TO_UBYTE(col[0], color[0]);
-    CLAMPED_FLOAT_TO_UBYTE(col[1], color[1]);
-    CLAMPED_FLOAT_TO_UBYTE(col[2], color[2]);
+    UNCLAMPED_FLOAT_TO_UBYTE(col[0], color.f[0]);
+    UNCLAMPED_FLOAT_TO_UBYTE(col[1], color.f[1]);
+    UNCLAMPED_FLOAT_TO_UBYTE(col[2], color.f[2]);
     pwc->clearColorRef = RGB(col[0], col[1], col[2]);
     DeleteObject(pwc->clearPen);
     DeleteObject(pwc->clearBrush);
diff --git a/mesalib/src/mesa/main/attrib.c b/mesalib/src/mesa/main/attrib.c
index 573100402..9767740a3 100644
--- a/mesalib/src/mesa/main/attrib.c
+++ b/mesalib/src/mesa/main/attrib.c
@@ -884,10 +884,10 @@ _mesa_PopAttrib(void)
 
                color = (const struct gl_colorbuffer_attrib *) attr->data;
                _mesa_ClearIndex((GLfloat) color->ClearIndex);
-               _mesa_ClearColor(color->ClearColorUnclamped[0],
-                                color->ClearColorUnclamped[1],
-                                color->ClearColorUnclamped[2],
-                                color->ClearColorUnclamped[3]);
+               _mesa_ClearColor(color->ClearColor.f[0],
+                                color->ClearColor.f[1],
+                                color->ClearColor.f[2],
+                                color->ClearColor.f[3]);
                _mesa_IndexMask(color->IndexMask);
                if (!ctx->Extensions.EXT_draw_buffers2) {
                   _mesa_ColorMask((GLboolean) (color->ColorMask[0][0] != 0),
diff --git a/mesalib/src/mesa/main/blend.c b/mesalib/src/mesa/main/blend.c
index 94a457f58..4214a661b 100644
--- a/mesalib/src/mesa/main/blend.c
+++ b/mesalib/src/mesa/main/blend.c
@@ -1,833 +1,832 @@
-/**

- * \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"

-

-

-

-/**

- * 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.

- *

- * \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);

-}

-

-

-/**

- * 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.

- */

-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);

-

-   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));

-

-   if (!validate_blend_factors(ctx, "glBlendFuncSeparate",

-                               sfactorRGB, dfactorRGB,

-                               sfactorA, dfactorA)) {

-      return;

-   }

-

-   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;

-      }

-   }

-   if (!changed)

-      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;

-

-   if (ctx->Driver.BlendFuncSeparate) {

-      ctx->Driver.BlendFuncSeparate(ctx, sfactorRGB, dfactorRGB,

-                                    sfactorA, 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.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.BlendFuncSeparatei) {

-      ctx->Driver.BlendFuncSeparatei(ctx, buf, sfactorRGB, dfactorRGB,

-                                     sfactorA, dfactorA);

-   }

-}

-

-

-/**

- * Check if given blend equation is legal.

- * \return GL_TRUE if legal, GL_FALSE otherwise.

- */

-static GLboolean

-legal_blend_equation(const struct gl_context *ctx,

-                     GLenum mode, GLboolean is_separate)

-{

-   switch (mode) {

-   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.

-       */

-      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;

-   }

-}

-

-

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

-void GLAPIENTRY

-_mesa_BlendEquation( GLenum mode )

-{

-   GLuint buf, numBuffers;

-   GLboolean changed;

-   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 (!legal_blend_equation(ctx, mode, GL_FALSE)) {

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

-      return;

-   }

-

-   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);

-   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);

-

-   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 (!legal_blend_equation(ctx, modeRGB, GL_TRUE)) {

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

-      return;

-   }

-

-   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;

-

-   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);

-   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);

-}

-

-

-/**

- * Set separate blend equations for one color buffer/target.

- */

-void GLAPIENTRY

-_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 */

-

-

-/**

- * 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] = red;

-   tmp[1] = green;

-   tmp[2] = blue;

-   tmp[3] = alpha;

-

-   if (TEST_EQ_4V(tmp, ctx->Color.BlendColorUnclamped))

-      return;

-

-   FLUSH_VERTICES(ctx, _NEW_COLOR);

-   COPY_4FV( ctx->Color.BlendColorUnclamped, tmp );

-

-   ctx->Color.BlendColor[0] = CLAMP(tmp[0], 0.0F, 1.0F);

-   ctx->Color.BlendColor[1] = CLAMP(tmp[1], 0.0F, 1.0F);

-   ctx->Color.BlendColor[2] = CLAMP(tmp[2], 0.0F, 1.0F);

-   ctx->Color.BlendColor[3] = CLAMP(tmp[3], 0.0F, 1.0F);

-

-   if (ctx->Driver.BlendColor)

-      (*ctx->Driver.BlendColor)(ctx, ctx->Color.BlendColor);

-}

-

-

-/**

- * 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);

-

-   if (MESA_VERBOSE & VERBOSE_API)

-      _mesa_debug(ctx, "glAlphaFunc(%s, %f)\n",

-                  _mesa_lookup_enum_by_nr(func), ref);

-

-   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:

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

-         return; /* no change */

-

-      FLUSH_VERTICES(ctx, _NEW_COLOR);

-      ctx->Color.AlphaFunc = func;

-      ctx->Color.AlphaRefUnclamped = ref;

-      ctx->Color.AlphaRef = CLAMP(ref, 0.0F, 1.0F);

-

-      if (ctx->Driver.AlphaFunc)

-         ctx->Driver.AlphaFunc(ctx, func, ctx->Color.AlphaRef);

-      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);

-

-   if (MESA_VERBOSE & VERBOSE_API)

-      _mesa_debug(ctx, "glLogicOp(%s)\n", _mesa_lookup_enum_by_nr(opcode));

-

-   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);

-}

-

-

-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:

-      FLUSH_VERTICES(ctx, _NEW_LIGHT);

-      ctx->Light.ClampVertexColor = clamp;

-      break;

-   case GL_CLAMP_FRAGMENT_COLOR_ARB:

-      FLUSH_VERTICES(ctx, _NEW_FRAG_CLAMP);

-      ctx->Color.ClampFragmentColor = clamp;

-      break;

-   case GL_CLAMP_READ_COLOR_ARB:

-      FLUSH_VERTICES(ctx, _NEW_COLOR);

-      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 )

-{

-   GLuint i;

-

-   /* 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 );

-   ASSIGN_4V( ctx->Color.ClearColorUnclamped, 0, 0, 0, 0 );

-   ctx->Color.AlphaEnabled = GL_FALSE;

-   ctx->Color.AlphaFunc = GL_ALWAYS;

-   ctx->Color.AlphaRef = 0;

-   ctx->Color.BlendEnabled = 0x0;

-   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 );

-   ASSIGN_4V( ctx->Color.BlendColorUnclamped, 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._ClampFragmentColor = GL_TRUE;

-   ctx->Color.ClampReadColor = GL_FIXED_ONLY_ARB;

-   ctx->Color._ClampReadColor = GL_TRUE;

-}

-

-/*@}*/

+/**
+ * \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"
+
+
+
+/**
+ * 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.
+ *
+ * \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);
+}
+
+
+/**
+ * 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.
+ */
+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);
+
+   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));
+
+   if (!validate_blend_factors(ctx, "glBlendFuncSeparate",
+                               sfactorRGB, dfactorRGB,
+                               sfactorA, dfactorA)) {
+      return;
+   }
+
+   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;
+      }
+   }
+   if (!changed)
+      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;
+
+   if (ctx->Driver.BlendFuncSeparate) {
+      ctx->Driver.BlendFuncSeparate(ctx, sfactorRGB, dfactorRGB,
+                                    sfactorA, 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.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.BlendFuncSeparatei) {
+      ctx->Driver.BlendFuncSeparatei(ctx, buf, sfactorRGB, dfactorRGB,
+                                     sfactorA, dfactorA);
+   }
+}
+
+
+/**
+ * Check if given blend equation is legal.
+ * \return GL_TRUE if legal, GL_FALSE otherwise.
+ */
+static GLboolean
+legal_blend_equation(const struct gl_context *ctx,
+                     GLenum mode, GLboolean is_separate)
+{
+   switch (mode) {
+   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.
+       */
+      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;
+   }
+}
+
+
+/* This is really an extension function! */
+void GLAPIENTRY
+_mesa_BlendEquation( GLenum mode )
+{
+   GLuint buf, numBuffers;
+   GLboolean changed;
+   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 (!legal_blend_equation(ctx, mode, GL_FALSE)) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glBlendEquation");
+      return;
+   }
+
+   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);
+   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);
+
+   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 (!legal_blend_equation(ctx, modeRGB, GL_TRUE)) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glBlendEquationSeparateEXT(modeRGB)");
+      return;
+   }
+
+   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;
+
+   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);
+   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);
+}
+
+
+/**
+ * Set separate blend equations for one color buffer/target.
+ */
+void GLAPIENTRY
+_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 */
+
+
+/**
+ * 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] = red;
+   tmp[1] = green;
+   tmp[2] = blue;
+   tmp[3] = alpha;
+
+   if (TEST_EQ_4V(tmp, ctx->Color.BlendColorUnclamped))
+      return;
+
+   FLUSH_VERTICES(ctx, _NEW_COLOR);
+   COPY_4FV( ctx->Color.BlendColorUnclamped, tmp );
+
+   ctx->Color.BlendColor[0] = CLAMP(tmp[0], 0.0F, 1.0F);
+   ctx->Color.BlendColor[1] = CLAMP(tmp[1], 0.0F, 1.0F);
+   ctx->Color.BlendColor[2] = CLAMP(tmp[2], 0.0F, 1.0F);
+   ctx->Color.BlendColor[3] = CLAMP(tmp[3], 0.0F, 1.0F);
+
+   if (ctx->Driver.BlendColor)
+      (*ctx->Driver.BlendColor)(ctx, ctx->Color.BlendColor);
+}
+
+
+/**
+ * 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);
+
+   if (MESA_VERBOSE & VERBOSE_API)
+      _mesa_debug(ctx, "glAlphaFunc(%s, %f)\n",
+                  _mesa_lookup_enum_by_nr(func), ref);
+
+   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:
+      if (ctx->Color.AlphaFunc == func && ctx->Color.AlphaRefUnclamped == ref)
+         return; /* no change */
+
+      FLUSH_VERTICES(ctx, _NEW_COLOR);
+      ctx->Color.AlphaFunc = func;
+      ctx->Color.AlphaRefUnclamped = ref;
+      ctx->Color.AlphaRef = CLAMP(ref, 0.0F, 1.0F);
+
+      if (ctx->Driver.AlphaFunc)
+         ctx->Driver.AlphaFunc(ctx, func, ctx->Color.AlphaRef);
+      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);
+
+   if (MESA_VERBOSE & VERBOSE_API)
+      _mesa_debug(ctx, "glLogicOp(%s)\n", _mesa_lookup_enum_by_nr(opcode));
+
+   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);
+}
+
+
+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:
+      FLUSH_VERTICES(ctx, _NEW_LIGHT);
+      ctx->Light.ClampVertexColor = clamp;
+      break;
+   case GL_CLAMP_FRAGMENT_COLOR_ARB:
+      FLUSH_VERTICES(ctx, _NEW_FRAG_CLAMP);
+      ctx->Color.ClampFragmentColor = clamp;
+      break;
+   case GL_CLAMP_READ_COLOR_ARB:
+      FLUSH_VERTICES(ctx, _NEW_COLOR);
+      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 )
+{
+   GLuint i;
+
+   /* 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.f, 0, 0, 0, 0 );
+   ctx->Color.AlphaEnabled = GL_FALSE;
+   ctx->Color.AlphaFunc = GL_ALWAYS;
+   ctx->Color.AlphaRef = 0;
+   ctx->Color.BlendEnabled = 0x0;
+   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 );
+   ASSIGN_4V( ctx->Color.BlendColorUnclamped, 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._ClampFragmentColor = GL_TRUE;
+   ctx->Color.ClampReadColor = GL_FIXED_ONLY_ARB;
+   ctx->Color._ClampReadColor = GL_TRUE;
+}
+
+/*@}*/
diff --git a/mesalib/src/mesa/main/clear.c b/mesalib/src/mesa/main/clear.c
index fa95e4522..301fe694c 100644
--- a/mesalib/src/mesa/main/clear.c
+++ b/mesalib/src/mesa/main/clear.c
@@ -83,16 +83,11 @@ _mesa_ClearColor( GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha )
    tmp[2] = blue;
    tmp[3] = alpha;
 
-   if (TEST_EQ_4V(tmp, ctx->Color.ClearColorUnclamped))
+   if (TEST_EQ_4V(tmp, ctx->Color.ClearColor.f))
       return; /* no change */
 
    FLUSH_VERTICES(ctx, _NEW_COLOR);
-   COPY_4V(ctx->Color.ClearColorUnclamped, tmp);
-
-   ctx->Color.ClearColor[0] = CLAMP(tmp[0], 0.0F, 1.0F);
-   ctx->Color.ClearColor[1] = CLAMP(tmp[1], 0.0F, 1.0F);
-   ctx->Color.ClearColor[2] = CLAMP(tmp[2], 0.0F, 1.0F);
-   ctx->Color.ClearColor[3] = CLAMP(tmp[3], 0.0F, 1.0F);
+   COPY_4V(ctx->Color.ClearColor.f, tmp);
 
    if (ctx->Driver.ClearColor) {
       /* it's OK to call glClearColor in CI mode but it should be a NOP */
@@ -110,25 +105,22 @@ _mesa_ClearColor( GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha )
 void GLAPIENTRY
 _mesa_ClearColorIiEXT(GLint r, GLint g, GLint b, GLint a)
 {
-   GLfloat tmp[4];
+   GLint tmp[4];
    GET_CURRENT_CONTEXT(ctx);
    ASSERT_OUTSIDE_BEGIN_END(ctx);
 
-   tmp[0] = (GLfloat) r;
-   tmp[1] = (GLfloat) g;
-   tmp[2] = (GLfloat) b;
-   tmp[3] = (GLfloat) a;
+   tmp[0] = r;
+   tmp[1] = g;
+   tmp[2] = b;
+   tmp[3] = a;
 
-   if (TEST_EQ_4V(tmp, ctx->Color.ClearColor))
+   if (TEST_EQ_4V(tmp, ctx->Color.ClearColor.i))
       return; /* no change */
 
    FLUSH_VERTICES(ctx, _NEW_COLOR);
+   COPY_4V(ctx->Color.ClearColor.i, tmp);
 
-   /* XXX we should eventually have a float/int/uint union for
-    * the ctx->Color.ClearColor state.
-    */
-   COPY_4V(ctx->Color.ClearColor, tmp);
-
+   /* these should be NOP calls for drivers supporting EXT_texture_integer */
    if (ctx->Driver.ClearColor) {
       ctx->Driver.ClearColor(ctx, ctx->Color.ClearColor);
    }
@@ -141,25 +133,22 @@ _mesa_ClearColorIiEXT(GLint r, GLint g, GLint b, GLint a)
 void GLAPIENTRY
 _mesa_ClearColorIuiEXT(GLuint r, GLuint g, GLuint b, GLuint a)
 {
-   GLfloat tmp[4];
+   GLuint tmp[4];
    GET_CURRENT_CONTEXT(ctx);
    ASSERT_OUTSIDE_BEGIN_END(ctx);
 
-   tmp[0] = (GLfloat) r;
-   tmp[1] = (GLfloat) g;
-   tmp[2] = (GLfloat) b;
-   tmp[3] = (GLfloat) a;
+   tmp[0] = r;
+   tmp[1] = g;
+   tmp[2] = b;
+   tmp[3] = a;
 
-   if (TEST_EQ_4V(tmp, ctx->Color.ClearColor))
+   if (TEST_EQ_4V(tmp, ctx->Color.ClearColor.ui))
       return; /* no change */
 
    FLUSH_VERTICES(ctx, _NEW_COLOR);
+   COPY_4V(ctx->Color.ClearColor.ui, tmp);
 
-   /* XXX we should eventually have a float/int/uint union for
-    * the ctx->Color.ClearColor state.
-    */
-   COPY_4V(ctx->Color.ClearColor, tmp);
-
+   /* these should be NOP calls for drivers supporting EXT_texture_integer */
    if (ctx->Driver.ClearColor) {
       ctx->Driver.ClearColor(ctx, ctx->Color.ClearColor);
    }
@@ -364,21 +353,18 @@ _mesa_ClearBufferiv(GLenum buffer, GLint drawbuffer, const GLint *value)
             return;
          }
          else if (mask) {
-            /* XXX note: we're putting the integer clear values into the
-             * floating point state var.  This will not always work.  We'll
-             * need a new ctx->Driver.ClearBuffer() hook....
-             */
-            GLclampf clearSave[4];
+            union gl_color_union clearSave;
+
             /* save color */
-            COPY_4V(clearSave, ctx->Color.ClearColor);
+            clearSave = ctx->Color.ClearColor;
             /* set color */
-            COPY_4V_CAST(ctx->Color.ClearColor, value, GLclampf);
+            COPY_4V(ctx->Color.ClearColor.i, value);
             if (ctx->Driver.ClearColor)
                ctx->Driver.ClearColor(ctx, ctx->Color.ClearColor);
             /* clear buffer(s) */
             ctx->Driver.Clear(ctx, mask);
             /* restore color */
-            COPY_4V(ctx->Color.ClearColor, clearSave);
+            ctx->Color.ClearColor = clearSave;
             if (ctx->Driver.ClearColor)
                ctx->Driver.ClearColor(ctx, clearSave);
          }
@@ -418,21 +404,18 @@ _mesa_ClearBufferuiv(GLenum buffer, GLint drawbuffer, const GLuint *value)
             return;
          }
          else if (mask) {
-            /* XXX note: we're putting the uint clear values into the
-             * floating point state var.  This will not always work.  We'll
-             * need a new ctx->Driver.ClearBuffer() hook....
-             */
-            GLclampf clearSave[4];
+            union gl_color_union clearSave;
+
             /* save color */
-            COPY_4V(clearSave, ctx->Color.ClearColor);
+            clearSave = ctx->Color.ClearColor;
             /* set color */
-            COPY_4V_CAST(ctx->Color.ClearColor, value, GLclampf);
+            COPY_4V(ctx->Color.ClearColor.ui, value);
             if (ctx->Driver.ClearColor)
                ctx->Driver.ClearColor(ctx, ctx->Color.ClearColor);
             /* clear buffer(s) */
             ctx->Driver.Clear(ctx, mask);
             /* restore color */
-            COPY_4V(ctx->Color.ClearColor, clearSave);
+            ctx->Color.ClearColor = clearSave;
             if (ctx->Driver.ClearColor)
                ctx->Driver.ClearColor(ctx, clearSave);
          }
@@ -495,17 +478,18 @@ _mesa_ClearBufferfv(GLenum buffer, GLint drawbuffer, const GLfloat *value)
             return;
          }
          else if (mask) {
-            GLclampf clearSave[4];
+            union gl_color_union clearSave;
+
             /* save color */
-            COPY_4V(clearSave, ctx->Color.ClearColor);
+            clearSave = ctx->Color.ClearColor;
             /* set color */
-            COPY_4V_CAST(ctx->Color.ClearColor, value, GLclampf);
+            COPY_4V_CAST(ctx->Color.ClearColor.f, value, GLclampf);
             if (ctx->Driver.ClearColor)
                ctx->Driver.ClearColor(ctx, ctx->Color.ClearColor);
             /* clear buffer(s) */
             ctx->Driver.Clear(ctx, mask);
             /* restore color */
-            COPY_4V(ctx->Color.ClearColor, clearSave);
+            ctx->Color.ClearColor = clearSave;
             if (ctx->Driver.ClearColor)
                ctx->Driver.ClearColor(ctx, clearSave);
          }
diff --git a/mesalib/src/mesa/main/colormac.h b/mesalib/src/mesa/main/colormac.h
index d308c48b6..4b7c3b4a0 100644
--- a/mesalib/src/mesa/main/colormac.h
+++ b/mesalib/src/mesa/main/colormac.h
@@ -169,6 +169,17 @@ do {						\
 } while (0)
 
 
+/**
+ * Convert four float values in [0,1] to ubytes in [0,255] with clamping.
+ */
+static inline void
+_mesa_unclamped_float_rgba_to_ubyte(GLubyte dst[4], const GLfloat src[4])
+{
+   int i;
+   for (i = 0; i < 4; i++)
+      UNCLAMPED_FLOAT_TO_UBYTE(dst[i], src[i]);
+}
+
 
 /**
  * \name Generic color packing macros.  All inputs should be GLubytes.
diff --git a/mesalib/src/mesa/main/dd.h b/mesalib/src/mesa/main/dd.h
index b77e4f092..d6cc0196d 100644
--- a/mesalib/src/mesa/main/dd.h
+++ b/mesalib/src/mesa/main/dd.h
@@ -589,7 +589,8 @@ struct dd_function_table {
                               GLenum sfactorRGB, GLenum dfactorRGB,
                               GLenum sfactorA, GLenum dfactorA);
    /** Specify clear values for the color buffers */
-   void (*ClearColor)(struct gl_context *ctx, const GLfloat color[4]);
+   void (*ClearColor)(struct gl_context *ctx,
+                      const union gl_color_union color);
    /** Specify the clear value for the depth buffer */
    void (*ClearDepth)(struct gl_context *ctx, GLclampd d);
    /** Specify the clear value for the stencil buffer */
diff --git a/mesalib/src/mesa/main/get.c b/mesalib/src/mesa/main/get.c
index 069254b18..a777bd8c4 100644
--- a/mesalib/src/mesa/main/get.c
+++ b/mesalib/src/mesa/main/get.c
@@ -1673,10 +1673,13 @@ find_custom_value(struct gl_context *ctx, const struct value_desc *d, union valu
          COPY_4FV(v->value_float_4, ctx->Fog.ColorUnclamped);
       break;
    case GL_COLOR_CLEAR_VALUE:
-      if(ctx->Color._ClampFragmentColor)
-         COPY_4FV(v->value_float_4, ctx->Color.ClearColor);
-      else
-         COPY_4FV(v->value_float_4, ctx->Color.ClearColorUnclamped);
+      if(ctx->Color._ClampFragmentColor) {
+         v->value_float_4[0] = CLAMP(ctx->Color.ClearColor.f[0], 0.0F, 1.0F);
+         v->value_float_4[1] = CLAMP(ctx->Color.ClearColor.f[1], 0.0F, 1.0F);
+         v->value_float_4[2] = CLAMP(ctx->Color.ClearColor.f[2], 0.0F, 1.0F);
+         v->value_float_4[3] = CLAMP(ctx->Color.ClearColor.f[3], 0.0F, 1.0F);
+      } else
+         COPY_4FV(v->value_float_4, ctx->Color.ClearColor.f);
       break;
    case GL_BLEND_COLOR_EXT:
       if(ctx->Color._ClampFragmentColor)
diff --git a/mesalib/src/mesa/main/image.c b/mesalib/src/mesa/main/image.c
index 3e75e7c6b..66d7eec65 100644
--- a/mesalib/src/mesa/main/image.c
+++ b/mesalib/src/mesa/main/image.c
@@ -1513,12 +1513,8 @@ _mesa_convert_colors(GLenum srcType, const GLvoid *src,
          GLubyte (*dst1)[4] = (GLubyte (*)[4]) (useTemp ? tempBuffer : dst);
          GLuint i;
          for (i = 0; i < count; i++) {
-            if (!mask || mask[i]) {
-               UNCLAMPED_FLOAT_TO_UBYTE(dst1[i][RCOMP], src4[i][RCOMP]);
-               UNCLAMPED_FLOAT_TO_UBYTE(dst1[i][GCOMP], src4[i][GCOMP]);
-               UNCLAMPED_FLOAT_TO_UBYTE(dst1[i][BCOMP], src4[i][BCOMP]);
-               UNCLAMPED_FLOAT_TO_UBYTE(dst1[i][ACOMP], src4[i][ACOMP]);
-            }
+            if (!mask || mask[i])
+               _mesa_unclamped_float_rgba_to_ubyte(dst1[i], src4[i]);
          }
          if (useTemp)
             memcpy(dst, tempBuffer, count * 4 * sizeof(GLubyte));
diff --git a/mesalib/src/mesa/main/mtypes.h b/mesalib/src/mesa/main/mtypes.h
index ae500b4c2..8671ecda9 100644
--- a/mesalib/src/mesa/main/mtypes.h
+++ b/mesalib/src/mesa/main/mtypes.h
@@ -721,16 +721,26 @@ struct gl_accum_attrib
 
 
 /**
+ * Used for storing clear color, texture border color, etc.
+ * The float values are typically unclamped.
+ */
+union gl_color_union
+{
+   GLfloat f[4];
+   GLint i[4];
+   GLuint ui[4];
+};
+
+
+/**
  * Color buffer attribute group (GL_COLOR_BUFFER_BIT).
  */
 struct gl_colorbuffer_attrib
 {
-   GLuint ClearIndex;			/**< Index to use for glClear */
-   GLfloat ClearColorUnclamped[4];              /**< Color to use for glClear*/
-   GLclampf ClearColor[4];               /**< Color to use for glClear */
-
-   GLuint IndexMask;			/**< Color index write mask */
-   GLubyte ColorMask[MAX_DRAW_BUFFERS][4];/**< Each flag is 0xff or 0x0 */
+   GLuint ClearIndex;                      /**< Index for glClear */
+   union gl_color_union ClearColor;        /**< Color for glClear, unclamped */
+   GLuint IndexMask;                       /**< Color index write mask */
+   GLubyte ColorMask[MAX_DRAW_BUFFERS][4]; /**< Each flag is 0xff or 0x0 */
 
    GLenum DrawBuffer[MAX_DRAW_BUFFERS];	/**< Which buffer to draw into */
 
@@ -750,8 +760,8 @@ struct gl_colorbuffer_attrib
    /*@{*/
    GLbitfield BlendEnabled;		/**< Per-buffer blend enable flags */
 
-   /* NOTE: this does _not_ depend on fragment clamping or any other clamping control,
-    * only on the fixed-pointness of the render target.
+   /* NOTE: this does _not_ depend on fragment clamping or any other clamping
+    * control, only on the fixed-pointness of the render target.
     * The query does however depend on fragment color clamping.
     */
    GLfloat BlendColorUnclamped[4];               /**< Blending color */
@@ -1356,11 +1366,7 @@ struct gl_sampler_object
    GLenum WrapR;		/**< R-axis texture image wrap mode */
    GLenum MinFilter;		/**< minification filter */
    GLenum MagFilter;		/**< magnification filter */
-   union {
-      GLfloat f[4];
-      GLuint ui[4];
-      GLint i[4];
-   } BorderColor;               /**< Interpreted according to texture format */
+   union gl_color_union BorderColor;  /**< Interpreted according to texture format */
    GLfloat MinLod;		/**< min lambda, OpenGL 1.2 */
    GLfloat MaxLod;		/**< max lambda, OpenGL 1.2 */
    GLfloat LodBias;		/**< OpenGL 1.4 */
diff --git a/mesalib/src/mesa/main/uniforms.c b/mesalib/src/mesa/main/uniforms.c
index b0f9c33b8..2323819aa 100644
--- a/mesalib/src/mesa/main/uniforms.c
+++ b/mesalib/src/mesa/main/uniforms.c
@@ -111,21 +111,43 @@ is_sampler_type(GLenum type)
 {
    switch (type) {
    case GL_SAMPLER_1D:
+   case GL_INT_SAMPLER_1D:
+   case GL_UNSIGNED_INT_SAMPLER_1D:
    case GL_SAMPLER_2D:
+   case GL_INT_SAMPLER_2D:
+   case GL_UNSIGNED_INT_SAMPLER_2D:
    case GL_SAMPLER_3D:
+   case GL_INT_SAMPLER_3D:
+   case GL_UNSIGNED_INT_SAMPLER_3D:
    case GL_SAMPLER_CUBE:
+   case GL_INT_SAMPLER_CUBE:
+   case GL_UNSIGNED_INT_SAMPLER_CUBE:
    case GL_SAMPLER_1D_SHADOW:
    case GL_SAMPLER_2D_SHADOW:
    case GL_SAMPLER_CUBE_SHADOW:
    case GL_SAMPLER_2D_RECT_ARB:
+   case GL_INT_SAMPLER_2D_RECT:
+   case GL_UNSIGNED_INT_SAMPLER_2D_RECT:
    case GL_SAMPLER_2D_RECT_SHADOW_ARB:
    case GL_SAMPLER_1D_ARRAY_EXT:
+   case GL_INT_SAMPLER_1D_ARRAY:
+   case GL_UNSIGNED_INT_SAMPLER_1D_ARRAY:
    case GL_SAMPLER_2D_ARRAY_EXT:
+   case GL_INT_SAMPLER_2D_ARRAY:
+   case GL_UNSIGNED_INT_SAMPLER_2D_ARRAY:
    case GL_SAMPLER_1D_ARRAY_SHADOW_EXT:
    case GL_SAMPLER_2D_ARRAY_SHADOW_EXT:
    case GL_SAMPLER_CUBE_MAP_ARRAY:
    case GL_SAMPLER_CUBE_MAP_ARRAY_SHADOW:
    case GL_SAMPLER_BUFFER:
+   case GL_INT_SAMPLER_BUFFER:
+   case GL_UNSIGNED_INT_SAMPLER_BUFFER:
+   case GL_SAMPLER_2D_MULTISAMPLE:
+   case GL_INT_SAMPLER_2D_MULTISAMPLE:
+   case GL_UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE:
+   case GL_SAMPLER_2D_MULTISAMPLE_ARRAY:
+   case GL_INT_SAMPLER_2D_MULTISAMPLE_ARRAY:
+   case GL_UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE_ARRAY:
       return GL_TRUE;
    default:
       return GL_FALSE;
diff --git a/mesalib/src/mesa/state_tracker/st_cb_clear.c b/mesalib/src/mesa/state_tracker/st_cb_clear.c
index 117000ba7..a4799e3cc 100644
--- a/mesalib/src/mesa/state_tracker/st_cb_clear.c
+++ b/mesalib/src/mesa/state_tracker/st_cb_clear.c
@@ -323,9 +323,9 @@ clear_with_quad(struct gl_context *ctx,
    set_vertex_shader(st);
 
    if (ctx->DrawBuffer->_ColorDrawBuffers[0]) {
-      st_translate_color(ctx->Color.ClearColorUnclamped,
-                         ctx->DrawBuffer->_ColorDrawBuffers[0]->_BaseFormat,
-                         clearColor);
+      st_translate_color(ctx->Color.ClearColor.f,
+                               ctx->DrawBuffer->_ColorDrawBuffers[0]->_BaseFormat,
+                               clearColor);
    }
 
    /* draw quad matching scissor rect */
@@ -582,12 +582,12 @@ st_Clear(struct gl_context *ctx, GLbitfield mask)
          clear_buffers |= PIPE_CLEAR_DEPTHSTENCIL;
 
       if (ctx->DrawBuffer->_ColorDrawBuffers[0]) {
-         st_translate_color(ctx->Color.ClearColor,
-                            ctx->DrawBuffer->_ColorDrawBuffers[0]->_BaseFormat,
-                            clearColor);
+         st_translate_color(ctx->Color.ClearColor.f,
+			    ctx->DrawBuffer->_ColorDrawBuffers[0]->_BaseFormat,
+			    clearColor);
       }
 
-      st->pipe->clear(st->pipe, clear_buffers, ctx->Color.ClearColorUnclamped,
+      st->pipe->clear(st->pipe, clear_buffers, clearColor,
                       ctx->Depth.Clear, ctx->Stencil.Clear);
    }
    if (mask & BUFFER_BIT_ACCUM)
diff --git a/mesalib/src/mesa/state_tracker/st_format.c b/mesalib/src/mesa/state_tracker/st_format.c
index bd4f0860c..6eb8a506b 100644
--- a/mesalib/src/mesa/state_tracker/st_format.c
+++ b/mesalib/src/mesa/state_tracker/st_format.c
@@ -1441,8 +1441,9 @@ st_sampler_compat_formats(enum pipe_format format1, enum pipe_format format2)
  * This is used for translating texture border color and the clear
  * color.  For example, the clear color is interpreted according to
  * the renderbuffer's base format.  For example, if clearing a
- * GL_LUMINANCE buffer, ClearColor[0] = luminance and ClearColor[1] =
- * alpha.  Similarly for texture border colors.
+ * GL_LUMINANCE buffer, we'll return colorOut[0] = colorOut[1] =
+ * colorOut[2] = colorIn[0].
+ * Similarly for texture border colors.
  */
 void
 st_translate_color(const GLfloat colorIn[4], GLenum baseFormat,
diff --git a/mesalib/src/mesa/swrast/s_blend.c b/mesalib/src/mesa/swrast/s_blend.c
index 125364913..3760f91d6 100644
--- a/mesalib/src/mesa/swrast/s_blend.c
+++ b/mesalib/src/mesa/swrast/s_blend.c
@@ -1,1014 +1,1010 @@
-/*

- * Mesa 3-D graphics library

- * Version:  7.1

- *

- * Copyright (C) 1999-2008  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.

- */

-

-

-/**

- * \file swrast/s_blend.c

- * \brief software blending.

- * \author Brian Paul

- *

- * Only a few blend modes have been optimized (min, max, transparency, add)

- * more optimized cases can easily be added if needed.

- * Celestia uses glBlendFunc(GL_SRC_ALPHA, GL_ONE), for example.

- */

-

-

-

-#include "main/glheader.h"

-#include "main/context.h"

-#include "main/colormac.h"

-#include "main/macros.h"

-

-#include "s_blend.h"

-#include "s_context.h"

-#include "s_span.h"

-

-

-#if defined(USE_MMX_ASM)

-#include "x86/mmx.h"

-#include "x86/common_x86_asm.h"

-#define _BLENDAPI _ASMAPI

-#else

-#define _BLENDAPI

-#endif

-

-

-/**

- * Integer divide by 255

- * Declare "int divtemp" before using.

- * This satisfies Glean and should be reasonably fast.

- * Contributed by Nathan Hand.

- */

-#define DIV255(X)  (divtemp = (X), ((divtemp << 8) + divtemp + 256) >> 16)

-

-

-

-/**

- * Special case for glBlendFunc(GL_ZERO, GL_ONE).

- * No-op means the framebuffer values remain unchanged.

- * Any chanType ok.

- */

-static void _BLENDAPI

-blend_noop(struct gl_context *ctx, GLuint n, const GLubyte mask[],

-           GLvoid *src, const GLvoid *dst, GLenum chanType)

-{

-   GLint bytes;

-

-   ASSERT(ctx->Color.Blend[0].EquationRGB == GL_FUNC_ADD);

-   ASSERT(ctx->Color.Blend[0].EquationA == GL_FUNC_ADD);

-   ASSERT(ctx->Color.Blend[0].SrcRGB == GL_ZERO);

-   ASSERT(ctx->Color.Blend[0].DstRGB == GL_ONE);

-   (void) ctx;

-

-   /* just memcpy */

-   if (chanType == GL_UNSIGNED_BYTE)

-      bytes = 4 * n * sizeof(GLubyte);

-   else if (chanType == GL_UNSIGNED_SHORT)

-      bytes = 4 * n * sizeof(GLushort);

-   else

-      bytes = 4 * n * sizeof(GLfloat);

-

-   memcpy(src, dst, bytes);

-}

-

-

-/**

- * Special case for glBlendFunc(GL_ONE, GL_ZERO)

- * Any chanType ok.

- */

-static void _BLENDAPI

-blend_replace(struct gl_context *ctx, GLuint n, const GLubyte mask[],

-              GLvoid *src, const GLvoid *dst, GLenum chanType)

-{

-   ASSERT(ctx->Color.Blend[0].EquationRGB == GL_FUNC_ADD);

-   ASSERT(ctx->Color.Blend[0].EquationA == GL_FUNC_ADD);

-   ASSERT(ctx->Color.Blend[0].SrcRGB == GL_ONE);

-   ASSERT(ctx->Color.Blend[0].DstRGB == GL_ZERO);

-   (void) ctx;

-   (void) n;

-   (void) mask;

-   (void) src;

-   (void) dst;

-}

-

-

-/**

- * Common transparency blending mode:

- * glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA).

- */

-static void _BLENDAPI

-blend_transparency_ubyte(struct gl_context *ctx, GLuint n, const GLubyte mask[],

-                         GLvoid *src, const GLvoid *dst, GLenum chanType)

-{

-   GLubyte (*rgba)[4] = (GLubyte (*)[4]) src;

-   const GLubyte (*dest)[4] = (const GLubyte (*)[4]) dst;

-   GLuint i;

-

-   ASSERT(ctx->Color.Blend[0].EquationRGB == GL_FUNC_ADD);

-   ASSERT(ctx->Color.Blend[0].EquationA == GL_FUNC_ADD);

-   ASSERT(ctx->Color.Blend[0].SrcRGB == GL_SRC_ALPHA);

-   ASSERT(ctx->Color.Blend[0].SrcA == GL_SRC_ALPHA);

-   ASSERT(ctx->Color.Blend[0].DstRGB == GL_ONE_MINUS_SRC_ALPHA);

-   ASSERT(ctx->Color.Blend[0].DstA == GL_ONE_MINUS_SRC_ALPHA);

-   ASSERT(chanType == GL_UNSIGNED_BYTE);

-

-   (void) ctx;

-

-   for (i = 0; i < n; i++) {

-      if (mask[i]) {

-         const GLint t = rgba[i][ACOMP];  /* t is in [0, 255] */

-         if (t == 0) {

-            /* 0% alpha */

-            COPY_4UBV(rgba[i], dest[i]);

-         }

-         else if (t != 255) {

-	    GLint divtemp;

-            const GLint r = DIV255((rgba[i][RCOMP] - dest[i][RCOMP]) * t) + dest[i][RCOMP];

-            const GLint g = DIV255((rgba[i][GCOMP] - dest[i][GCOMP]) * t) + dest[i][GCOMP];

-            const GLint b = DIV255((rgba[i][BCOMP] - dest[i][BCOMP]) * t) + dest[i][BCOMP];

-            const GLint a = DIV255((rgba[i][ACOMP] - dest[i][ACOMP]) * t) + dest[i][ACOMP]; 

-            ASSERT(r <= 255);

-            ASSERT(g <= 255);

-            ASSERT(b <= 255);

-            ASSERT(a <= 255);

-            rgba[i][RCOMP] = (GLubyte) r;

-            rgba[i][GCOMP] = (GLubyte) g;

-            rgba[i][BCOMP] = (GLubyte) b;

-            rgba[i][ACOMP] = (GLubyte) a;

-         }

-      }

-   }

-}

-

-

-static void _BLENDAPI

-blend_transparency_ushort(struct gl_context *ctx, GLuint n, const GLubyte mask[],

-                          GLvoid *src, const GLvoid *dst, GLenum chanType)

-{

-   GLushort (*rgba)[4] = (GLushort (*)[4]) src;

-   const GLushort (*dest)[4] = (const GLushort (*)[4]) dst;

-   GLuint i;

-

-   ASSERT(ctx->Color.Blend[0].EquationRGB == GL_FUNC_ADD);

-   ASSERT(ctx->Color.Blend[0].EquationA == GL_FUNC_ADD);

-   ASSERT(ctx->Color.Blend[0].SrcRGB == GL_SRC_ALPHA);

-   ASSERT(ctx->Color.Blend[0].SrcA == GL_SRC_ALPHA);

-   ASSERT(ctx->Color.Blend[0].DstRGB == GL_ONE_MINUS_SRC_ALPHA);

-   ASSERT(ctx->Color.Blend[0].DstA == GL_ONE_MINUS_SRC_ALPHA);

-   ASSERT(chanType == GL_UNSIGNED_SHORT);

-

-   (void) ctx;

-

-   for (i = 0; i < n; i++) {

-      if (mask[i]) {

-         const GLint t = rgba[i][ACOMP];

-         if (t == 0) {

-            /* 0% alpha */

-            COPY_4V(rgba[i], dest[i]);

-         }

-         else if (t != 65535) {

-            const GLfloat tt = (GLfloat) t / 65535.0F;

-            GLushort r = (GLushort) ((rgba[i][RCOMP] - dest[i][RCOMP]) * tt + dest[i][RCOMP]);

-            GLushort g = (GLushort) ((rgba[i][GCOMP] - dest[i][GCOMP]) * tt + dest[i][GCOMP]);

-            GLushort b = (GLushort) ((rgba[i][BCOMP] - dest[i][BCOMP]) * tt + dest[i][BCOMP]);

-            GLushort a = (GLushort) ((rgba[i][ACOMP] - dest[i][ACOMP]) * tt + dest[i][ACOMP]);

-            ASSIGN_4V(rgba[i], r, g, b, a);

-         }

-      }

-   }

-}

-

-

-static void _BLENDAPI

-blend_transparency_float(struct gl_context *ctx, GLuint n, const GLubyte mask[],

-                         GLvoid *src, const GLvoid *dst, GLenum chanType)

-{

-   GLfloat (*rgba)[4] = (GLfloat (*)[4]) src;

-   const GLfloat (*dest)[4] = (const GLfloat (*)[4]) dst;

-   GLuint i;

-

-   ASSERT(ctx->Color.Blend[0].EquationRGB == GL_FUNC_ADD);

-   ASSERT(ctx->Color.Blend[0].EquationA == GL_FUNC_ADD);

-   ASSERT(ctx->Color.Blend[0].SrcRGB == GL_SRC_ALPHA);

-   ASSERT(ctx->Color.Blend[0].SrcA == GL_SRC_ALPHA);

-   ASSERT(ctx->Color.Blend[0].DstRGB == GL_ONE_MINUS_SRC_ALPHA);

-   ASSERT(ctx->Color.Blend[0].DstA == GL_ONE_MINUS_SRC_ALPHA);

-   ASSERT(chanType == GL_FLOAT);

-

-   (void) ctx;

-

-   for (i = 0; i < n; i++) {

-      if (mask[i]) {

-         const GLfloat t = rgba[i][ACOMP];  /* t in [0, 1] */

-         if (t == 0.0F) {

-            /* 0% alpha */

-            COPY_4V(rgba[i], dest[i]);

-         }

-         else if (t != 1.0F) {

-            GLfloat r = (rgba[i][RCOMP] - dest[i][RCOMP]) * t + dest[i][RCOMP];

-            GLfloat g = (rgba[i][GCOMP] - dest[i][GCOMP]) * t + dest[i][GCOMP];

-            GLfloat b = (rgba[i][BCOMP] - dest[i][BCOMP]) * t + dest[i][BCOMP];

-            GLfloat a = (rgba[i][ACOMP] - dest[i][ACOMP]) * t + dest[i][ACOMP];

-            ASSIGN_4V(rgba[i], r, g, b, a);

-         }

-      }

-   }

-}

-

-

-

-/**

- * Add src and dest: glBlendFunc(GL_ONE, GL_ONE).

- * Any chanType ok.

- */

-static void _BLENDAPI

-blend_add(struct gl_context *ctx, GLuint n, const GLubyte mask[],

-          GLvoid *src, const GLvoid *dst, GLenum chanType)

-{

-   GLuint i;

-

-   ASSERT(ctx->Color.Blend[0].EquationRGB == GL_FUNC_ADD);

-   ASSERT(ctx->Color.Blend[0].EquationA == GL_FUNC_ADD);

-   ASSERT(ctx->Color.Blend[0].SrcRGB == GL_ONE);

-   ASSERT(ctx->Color.Blend[0].DstRGB == GL_ONE);

-   (void) ctx;

-

-   if (chanType == GL_UNSIGNED_BYTE) {

-      GLubyte (*rgba)[4] = (GLubyte (*)[4]) src;

-      const GLubyte (*dest)[4] = (const GLubyte (*)[4]) dst;

-      for (i=0;i<n;i++) {

-         if (mask[i]) {

-            GLint r = rgba[i][RCOMP] + dest[i][RCOMP];

-            GLint g = rgba[i][GCOMP] + dest[i][GCOMP];

-            GLint b = rgba[i][BCOMP] + dest[i][BCOMP];

-            GLint a = rgba[i][ACOMP] + dest[i][ACOMP];

-            rgba[i][RCOMP] = (GLubyte) MIN2( r, 255 );

-            rgba[i][GCOMP] = (GLubyte) MIN2( g, 255 );

-            rgba[i][BCOMP] = (GLubyte) MIN2( b, 255 );

-            rgba[i][ACOMP] = (GLubyte) MIN2( a, 255 );

-         }

-      }

-   }

-   else if (chanType == GL_UNSIGNED_SHORT) {

-      GLushort (*rgba)[4] = (GLushort (*)[4]) src;

-      const GLushort (*dest)[4] = (const GLushort (*)[4]) dst;

-      for (i=0;i<n;i++) {

-         if (mask[i]) {

-            GLint r = rgba[i][RCOMP] + dest[i][RCOMP];

-            GLint g = rgba[i][GCOMP] + dest[i][GCOMP];

-            GLint b = rgba[i][BCOMP] + dest[i][BCOMP];

-            GLint a = rgba[i][ACOMP] + dest[i][ACOMP];

-            rgba[i][RCOMP] = (GLshort) MIN2( r, 255 );

-            rgba[i][GCOMP] = (GLshort) MIN2( g, 255 );

-            rgba[i][BCOMP] = (GLshort) MIN2( b, 255 );

-            rgba[i][ACOMP] = (GLshort) MIN2( a, 255 );

-         }

-      }

-   }

-   else {

-      GLfloat (*rgba)[4] = (GLfloat (*)[4]) src;

-      const GLfloat (*dest)[4] = (const GLfloat (*)[4]) dst;

-      ASSERT(chanType == GL_FLOAT);

-      for (i=0;i<n;i++) {

-         if (mask[i]) {

-            /* don't RGB clamp to max */

-            rgba[i][RCOMP] += dest[i][RCOMP];

-            rgba[i][GCOMP] += dest[i][GCOMP];

-            rgba[i][BCOMP] += dest[i][BCOMP];

-            rgba[i][ACOMP] += dest[i][ACOMP];

-         }

-      }

-   }

-}

-

-

-

-/**

- * Blend min function.

- * Any chanType ok.

- */

-static void _BLENDAPI

-blend_min(struct gl_context *ctx, GLuint n, const GLubyte mask[],

-          GLvoid *src, const GLvoid *dst, GLenum chanType)

-{

-   GLuint i;

-   ASSERT(ctx->Color.Blend[0].EquationRGB == GL_MIN);

-   ASSERT(ctx->Color.Blend[0].EquationA == GL_MIN);

-   (void) ctx;

-

-   if (chanType == GL_UNSIGNED_BYTE) {

-      GLubyte (*rgba)[4] = (GLubyte (*)[4]) src;

-      const GLubyte (*dest)[4] = (const GLubyte (*)[4]) dst;

-      for (i=0;i<n;i++) {

-         if (mask[i]) {

-            rgba[i][RCOMP] = MIN2( rgba[i][RCOMP], dest[i][RCOMP] );

-            rgba[i][GCOMP] = MIN2( rgba[i][GCOMP], dest[i][GCOMP] );

-            rgba[i][BCOMP] = MIN2( rgba[i][BCOMP], dest[i][BCOMP] );

-            rgba[i][ACOMP] = MIN2( rgba[i][ACOMP], dest[i][ACOMP] );

-         }

-      }

-   }

-   else if (chanType == GL_UNSIGNED_SHORT) {

-      GLushort (*rgba)[4] = (GLushort (*)[4]) src;

-      const GLushort (*dest)[4] = (const GLushort (*)[4]) dst;

-      for (i=0;i<n;i++) {

-         if (mask[i]) {

-            rgba[i][RCOMP] = MIN2( rgba[i][RCOMP], dest[i][RCOMP] );

-            rgba[i][GCOMP] = MIN2( rgba[i][GCOMP], dest[i][GCOMP] );

-            rgba[i][BCOMP] = MIN2( rgba[i][BCOMP], dest[i][BCOMP] );

-            rgba[i][ACOMP] = MIN2( rgba[i][ACOMP], dest[i][ACOMP] );

-         }

-      }

-   }

-   else {

-      GLfloat (*rgba)[4] = (GLfloat (*)[4]) src;

-      const GLfloat (*dest)[4] = (const GLfloat (*)[4]) dst;

-      ASSERT(chanType == GL_FLOAT);

-      for (i=0;i<n;i++) {

-         if (mask[i]) {

-            rgba[i][RCOMP] = MIN2( rgba[i][RCOMP], dest[i][RCOMP] );

-            rgba[i][GCOMP] = MIN2( rgba[i][GCOMP], dest[i][GCOMP] );

-            rgba[i][BCOMP] = MIN2( rgba[i][BCOMP], dest[i][BCOMP] );

-            rgba[i][ACOMP] = MIN2( rgba[i][ACOMP], dest[i][ACOMP] );

-         }

-      }

-   }

-}

-

-

-/**

- * Blend max function.

- * Any chanType ok.

- */

-static void _BLENDAPI

-blend_max(struct gl_context *ctx, GLuint n, const GLubyte mask[],

-          GLvoid *src, const GLvoid *dst, GLenum chanType)

-{

-   GLuint i;

-   ASSERT(ctx->Color.Blend[0].EquationRGB == GL_MAX);

-   ASSERT(ctx->Color.Blend[0].EquationA == GL_MAX);

-   (void) ctx;

-

-   if (chanType == GL_UNSIGNED_BYTE) {

-      GLubyte (*rgba)[4] = (GLubyte (*)[4]) src;

-      const GLubyte (*dest)[4] = (const GLubyte (*)[4]) dst;

-      for (i=0;i<n;i++) {

-         if (mask[i]) {

-            rgba[i][RCOMP] = MAX2( rgba[i][RCOMP], dest[i][RCOMP] );

-            rgba[i][GCOMP] = MAX2( rgba[i][GCOMP], dest[i][GCOMP] );

-            rgba[i][BCOMP] = MAX2( rgba[i][BCOMP], dest[i][BCOMP] );

-            rgba[i][ACOMP] = MAX2( rgba[i][ACOMP], dest[i][ACOMP] );

-         }

-      }

-   }

-   else if (chanType == GL_UNSIGNED_SHORT) {

-      GLushort (*rgba)[4] = (GLushort (*)[4]) src;

-      const GLushort (*dest)[4] = (const GLushort (*)[4]) dst;

-      for (i=0;i<n;i++) {

-         if (mask[i]) {

-            rgba[i][RCOMP] = MAX2( rgba[i][RCOMP], dest[i][RCOMP] );

-            rgba[i][GCOMP] = MAX2( rgba[i][GCOMP], dest[i][GCOMP] );

-            rgba[i][BCOMP] = MAX2( rgba[i][BCOMP], dest[i][BCOMP] );

-            rgba[i][ACOMP] = MAX2( rgba[i][ACOMP], dest[i][ACOMP] );

-         }

-      }

-   }

-   else {

-      GLfloat (*rgba)[4] = (GLfloat (*)[4]) src;

-      const GLfloat (*dest)[4] = (const GLfloat (*)[4]) dst;

-      ASSERT(chanType == GL_FLOAT);

-      for (i=0;i<n;i++) {

-         if (mask[i]) {

-            rgba[i][RCOMP] = MAX2( rgba[i][RCOMP], dest[i][RCOMP] );

-            rgba[i][GCOMP] = MAX2( rgba[i][GCOMP], dest[i][GCOMP] );

-            rgba[i][BCOMP] = MAX2( rgba[i][BCOMP], dest[i][BCOMP] );

-            rgba[i][ACOMP] = MAX2( rgba[i][ACOMP], dest[i][ACOMP] );

-         }

-      }

-   }

-}

-

-

-

-/**

- * Modulate:  result = src * dest

- * Any chanType ok.

- */

-static void _BLENDAPI

-blend_modulate(struct gl_context *ctx, GLuint n, const GLubyte mask[],

-               GLvoid *src, const GLvoid *dst, GLenum chanType)

-{

-   GLuint i;

-   (void) ctx;

-

-   if (chanType == GL_UNSIGNED_BYTE) {

-      GLubyte (*rgba)[4] = (GLubyte (*)[4]) src;

-      const GLubyte (*dest)[4] = (const GLubyte (*)[4]) dst;

-      for (i=0;i<n;i++) {

-         if (mask[i]) {

-	    GLint divtemp;

-            rgba[i][RCOMP] = DIV255(rgba[i][RCOMP] * dest[i][RCOMP]);

-            rgba[i][GCOMP] = DIV255(rgba[i][GCOMP] * dest[i][GCOMP]);

-            rgba[i][BCOMP] = DIV255(rgba[i][BCOMP] * dest[i][BCOMP]);

-            rgba[i][ACOMP] = DIV255(rgba[i][ACOMP] * dest[i][ACOMP]);

-         }

-      }

-   }

-   else if (chanType == GL_UNSIGNED_SHORT) {

-      GLushort (*rgba)[4] = (GLushort (*)[4]) src;

-      const GLushort (*dest)[4] = (const GLushort (*)[4]) dst;

-      for (i=0;i<n;i++) {

-         if (mask[i]) {

-            rgba[i][RCOMP] = (rgba[i][RCOMP] * dest[i][RCOMP] + 65535) >> 16;

-            rgba[i][GCOMP] = (rgba[i][GCOMP] * dest[i][GCOMP] + 65535) >> 16;

-            rgba[i][BCOMP] = (rgba[i][BCOMP] * dest[i][BCOMP] + 65535) >> 16;

-            rgba[i][ACOMP] = (rgba[i][ACOMP] * dest[i][ACOMP] + 65535) >> 16;

-         }

-      }

-   }

-   else {

-      GLfloat (*rgba)[4] = (GLfloat (*)[4]) src;

-      const GLfloat (*dest)[4] = (const GLfloat (*)[4]) dst;

-      ASSERT(chanType == GL_FLOAT);

-      for (i=0;i<n;i++) {

-         if (mask[i]) {

-            rgba[i][RCOMP] = rgba[i][RCOMP] * dest[i][RCOMP];

-            rgba[i][GCOMP] = rgba[i][GCOMP] * dest[i][GCOMP];

-            rgba[i][BCOMP] = rgba[i][BCOMP] * dest[i][BCOMP];

-            rgba[i][ACOMP] = rgba[i][ACOMP] * dest[i][ACOMP];

-         }

-      }

-   }

-}

-

-

-/**

- * Do any blending operation, using floating point.

- * \param n  number of pixels

- * \param mask  fragment writemask array

- * \param rgba  array of incoming (and modified) pixels

- * \param dest  array of pixels from the dest color buffer

- */

-static void

-blend_general_float(struct gl_context *ctx, GLuint n, const GLubyte mask[],

-                    GLfloat rgba[][4], GLfloat dest[][4],

-                    GLenum chanType)

-{

-   GLuint i;

-

-   for (i = 0; i < n; i++) {

-      if (mask[i]) {

-         /* Incoming/source Color */

-         const GLfloat Rs = rgba[i][RCOMP];

-         const GLfloat Gs = rgba[i][GCOMP];

-         const GLfloat Bs = rgba[i][BCOMP];

-         const GLfloat As = rgba[i][ACOMP];

-

-         /* Frame buffer/dest color */

-         const GLfloat Rd = dest[i][RCOMP];

-         const GLfloat Gd = dest[i][GCOMP];

-         const GLfloat Bd = dest[i][BCOMP];

-         const GLfloat Ad = dest[i][ACOMP];

-

-         GLfloat sR, sG, sB, sA;  /* Source factor */

-         GLfloat dR, dG, dB, dA;  /* Dest factor */

-         GLfloat r, g, b, a;      /* result color */

-

-         /* XXX for the case of constant blend terms we could init

-          * the sX and dX variables just once before the loop.

-          */

-

-         /* Source RGB factor */

-         switch (ctx->Color.Blend[0].SrcRGB) {

-            case GL_ZERO:

-               sR = sG = sB = 0.0F;

-               break;

-            case GL_ONE:

-               sR = sG = sB = 1.0F;

-               break;

-            case GL_DST_COLOR:

-               sR = Rd;

-               sG = Gd;

-               sB = Bd;

-               break;

-            case GL_ONE_MINUS_DST_COLOR:

-               sR = 1.0F - Rd;

-               sG = 1.0F - Gd;

-               sB = 1.0F - Bd;

-               break;

-            case GL_SRC_ALPHA:

-               sR = sG = sB = As;

-               break;

-            case GL_ONE_MINUS_SRC_ALPHA:

-               sR = sG = sB = 1.0F - As;

-               break;

-            case GL_DST_ALPHA:

-               sR = sG = sB = Ad;

-               break;

-            case GL_ONE_MINUS_DST_ALPHA:

-               sR = sG = sB = 1.0F - Ad;

-               break;

-            case GL_SRC_ALPHA_SATURATE:

-               if (As < 1.0F - Ad) {

-                  sR = sG = sB = As;

-               }

-               else {

-                  sR = sG = sB = 1.0F - Ad;

-               }

-               break;

-            case GL_CONSTANT_COLOR:

-               sR = ctx->Color.BlendColor[0];

-               sG = ctx->Color.BlendColor[1];

-               sB = ctx->Color.BlendColor[2];

-               break;

-            case GL_ONE_MINUS_CONSTANT_COLOR:

-               sR = 1.0F - ctx->Color.BlendColor[0];

-               sG = 1.0F - ctx->Color.BlendColor[1];

-               sB = 1.0F - ctx->Color.BlendColor[2];

-               break;

-            case GL_CONSTANT_ALPHA:

-               sR = sG = sB = ctx->Color.BlendColor[3];

-               break;

-            case GL_ONE_MINUS_CONSTANT_ALPHA:

-               sR = sG = sB = 1.0F - ctx->Color.BlendColor[3];

-               break;

-            case GL_SRC_COLOR:

-               sR = Rs;

-               sG = Gs;

-               sB = Bs;

-               break;

-            case GL_ONE_MINUS_SRC_COLOR:

-               sR = 1.0F - Rs;

-               sG = 1.0F - Gs;

-               sB = 1.0F - Bs;

-               break;

-            default:

-               /* this should never happen */

-               _mesa_problem(ctx, "Bad blend source RGB factor in blend_general_float");

-               return;

-         }

-

-         /* Source Alpha factor */

-         switch (ctx->Color.Blend[0].SrcA) {

-            case GL_ZERO:

-               sA = 0.0F;

-               break;

-            case GL_ONE:

-               sA = 1.0F;

-               break;

-            case GL_DST_COLOR:

-               sA = Ad;

-               break;

-            case GL_ONE_MINUS_DST_COLOR:

-               sA = 1.0F - Ad;

-               break;

-            case GL_SRC_ALPHA:

-               sA = As;

-               break;

-            case GL_ONE_MINUS_SRC_ALPHA:

-               sA = 1.0F - As;

-               break;

-            case GL_DST_ALPHA:

-               sA = Ad;

-               break;

-            case GL_ONE_MINUS_DST_ALPHA:

-               sA = 1.0F - Ad;

-               break;

-            case GL_SRC_ALPHA_SATURATE:

-               sA = 1.0;

-               break;

-            case GL_CONSTANT_COLOR:

-               sA = ctx->Color.BlendColor[3];

-               break;

-            case GL_ONE_MINUS_CONSTANT_COLOR:

-               sA = 1.0F - ctx->Color.BlendColor[3];

-               break;

-            case GL_CONSTANT_ALPHA:

-               sA = ctx->Color.BlendColor[3];

-               break;

-            case GL_ONE_MINUS_CONSTANT_ALPHA:

-               sA = 1.0F - ctx->Color.BlendColor[3];

-               break;

-            case GL_SRC_COLOR:

-               sA = As;

-               break;

-            case GL_ONE_MINUS_SRC_COLOR:

-               sA = 1.0F - As;

-               break;

-            default:

-               /* this should never happen */

-               sA = 0.0F;

-               _mesa_problem(ctx, "Bad blend source A factor in blend_general_float");

-               return;

-         }

-

-         /* Dest RGB factor */

-         switch (ctx->Color.Blend[0].DstRGB) {

-            case GL_ZERO:

-               dR = dG = dB = 0.0F;

-               break;

-            case GL_ONE:

-               dR = dG = dB = 1.0F;

-               break;

-            case GL_SRC_COLOR:

-               dR = Rs;

-               dG = Gs;

-               dB = Bs;

-               break;

-            case GL_ONE_MINUS_SRC_COLOR:

-               dR = 1.0F - Rs;

-               dG = 1.0F - Gs;

-               dB = 1.0F - Bs;

-               break;

-            case GL_SRC_ALPHA:

-               dR = dG = dB = As;

-               break;

-            case GL_ONE_MINUS_SRC_ALPHA:

-               dR = dG = dB = 1.0F - As;

-               break;

-            case GL_DST_ALPHA:

-               dR = dG = dB = Ad;

-               break;

-            case GL_ONE_MINUS_DST_ALPHA:

-               dR = dG = dB = 1.0F - Ad;

-               break;

-            case GL_CONSTANT_COLOR:

-               dR = ctx->Color.BlendColor[0];

-               dG = ctx->Color.BlendColor[1];

-               dB = ctx->Color.BlendColor[2];

-               break;

-            case GL_ONE_MINUS_CONSTANT_COLOR:

-               dR = 1.0F - ctx->Color.BlendColor[0];

-               dG = 1.0F - ctx->Color.BlendColor[1];

-               dB = 1.0F - ctx->Color.BlendColor[2];

-               break;

-            case GL_CONSTANT_ALPHA:

-               dR = dG = dB = ctx->Color.BlendColor[3];

-               break;

-            case GL_ONE_MINUS_CONSTANT_ALPHA:

-               dR = dG = dB = 1.0F - ctx->Color.BlendColor[3];

-               break;

-            case GL_DST_COLOR:

-               dR = Rd;

-               dG = Gd;

-               dB = Bd;

-               break;

-            case GL_ONE_MINUS_DST_COLOR:

-               dR = 1.0F - Rd;

-               dG = 1.0F - Gd;

-               dB = 1.0F - Bd;

-               break;

-            default:

-               /* this should never happen */

-               dR = dG = dB = 0.0F;

-               _mesa_problem(ctx, "Bad blend dest RGB factor in blend_general_float");

-               return;

-         }

-

-         /* Dest Alpha factor */

-         switch (ctx->Color.Blend[0].DstA) {

-            case GL_ZERO:

-               dA = 0.0F;

-               break;

-            case GL_ONE:

-               dA = 1.0F;

-               break;

-            case GL_SRC_COLOR:

-               dA = As;

-               break;

-            case GL_ONE_MINUS_SRC_COLOR:

-               dA = 1.0F - As;

-               break;

-            case GL_SRC_ALPHA:

-               dA = As;

-               break;

-            case GL_ONE_MINUS_SRC_ALPHA:

-               dA = 1.0F - As;

-               break;

-            case GL_DST_ALPHA:

-               dA = Ad;

-               break;

-            case GL_ONE_MINUS_DST_ALPHA:

-               dA = 1.0F - Ad;

-               break;

-            case GL_CONSTANT_COLOR:

-               dA = ctx->Color.BlendColor[3];

-               break;

-            case GL_ONE_MINUS_CONSTANT_COLOR:

-               dA = 1.0F - ctx->Color.BlendColor[3];

-               break;

-            case GL_CONSTANT_ALPHA:

-               dA = ctx->Color.BlendColor[3];

-               break;

-            case GL_ONE_MINUS_CONSTANT_ALPHA:

-               dA = 1.0F - ctx->Color.BlendColor[3];

-               break;

-            case GL_DST_COLOR:

-               dA = Ad;

-               break;

-            case GL_ONE_MINUS_DST_COLOR:

-               dA = 1.0F - Ad;

-               break;

-            default:

-               /* this should never happen */

-               dA = 0.0F;

-               _mesa_problem(ctx, "Bad blend dest A factor in blend_general_float");

-               return;

-         }

-

-         /* compute the blended RGB */

-         switch (ctx->Color.Blend[0].EquationRGB) {

-         case GL_FUNC_ADD:

-            r = Rs * sR + Rd * dR;

-            g = Gs * sG + Gd * dG;

-            b = Bs * sB + Bd * dB;

-            a = As * sA + Ad * dA;

-            break;

-         case GL_FUNC_SUBTRACT:

-            r = Rs * sR - Rd * dR;

-            g = Gs * sG - Gd * dG;

-            b = Bs * sB - Bd * dB;

-            a = As * sA - Ad * dA;

-            break;

-         case GL_FUNC_REVERSE_SUBTRACT:

-            r = Rd * dR - Rs * sR;

-            g = Gd * dG - Gs * sG;

-            b = Bd * dB - Bs * sB;

-            a = Ad * dA - As * sA;

-            break;

-         case GL_MIN:

-	    r = MIN2( Rd, Rs );

-	    g = MIN2( Gd, Gs );

-	    b = MIN2( Bd, Bs );

-            break;

-         case GL_MAX:

-	    r = MAX2( Rd, Rs );

-	    g = MAX2( Gd, Gs );

-	    b = MAX2( Bd, Bs );

-            break;

-	 default:

-            /* should never get here */

-            r = g = b = 0.0F;  /* silence uninitialized var warning */

-            _mesa_problem(ctx, "unexpected BlendEquation in blend_general()");

-            return;

-         }

-

-         /* compute the blended alpha */

-         switch (ctx->Color.Blend[0].EquationA) {

-         case GL_FUNC_ADD:

-            a = As * sA + Ad * dA;

-            break;

-         case GL_FUNC_SUBTRACT:

-            a = As * sA - Ad * dA;

-            break;

-         case GL_FUNC_REVERSE_SUBTRACT:

-            a = Ad * dA - As * sA;

-            break;

-         case GL_MIN:

-	    a = MIN2( Ad, As );

-            break;

-         case GL_MAX:

-	    a = MAX2( Ad, As );

-            break;

-         default:

-            /* should never get here */

-            a = 0.0F;  /* silence uninitialized var warning */

-            _mesa_problem(ctx, "unexpected BlendEquation in blend_general()");

-            return;

-         }

-

-         /* final clamping */

-#if 0

-         rgba[i][RCOMP] = MAX2( r, 0.0F );

-         rgba[i][GCOMP] = MAX2( g, 0.0F );

-         rgba[i][BCOMP] = MAX2( b, 0.0F );

-         rgba[i][ACOMP] = CLAMP( a, 0.0F, 1.0F );

-#else

-         ASSIGN_4V(rgba[i], r, g, b, a);

-#endif

-      }

-   }

-}

-

-

-/**

- * Do any blending operation, any chanType.

- */

-static void

-blend_general(struct gl_context *ctx, GLuint n, const GLubyte mask[],

-              void *src, const void *dst, GLenum chanType)

-{

-   GLfloat (*rgbaF)[4], (*destF)[4];

-

-   rgbaF = (GLfloat (*)[4]) malloc(4 * n * sizeof(GLfloat));

-   destF = (GLfloat (*)[4]) malloc(4 * n * sizeof(GLfloat));

-   if (!rgbaF || !destF) {

-      free(rgbaF);

-      free(destF);

-      _mesa_error(ctx, GL_OUT_OF_MEMORY, "blending");

-      return;

-   }

-

-   if (chanType == GL_UNSIGNED_BYTE) {

-      GLubyte (*rgba)[4] = (GLubyte (*)[4]) src;

-      const GLubyte (*dest)[4] = (const GLubyte (*)[4]) dst;

-      GLuint i;

-      /* convert ubytes to floats */

-      for (i = 0; i < n; i++) {

-         if (mask[i]) {

-            rgbaF[i][RCOMP] = UBYTE_TO_FLOAT(rgba[i][RCOMP]);

-            rgbaF[i][GCOMP] = UBYTE_TO_FLOAT(rgba[i][GCOMP]);

-            rgbaF[i][BCOMP] = UBYTE_TO_FLOAT(rgba[i][BCOMP]);

-            rgbaF[i][ACOMP] = UBYTE_TO_FLOAT(rgba[i][ACOMP]);

-            destF[i][RCOMP] = UBYTE_TO_FLOAT(dest[i][RCOMP]);

-            destF[i][GCOMP] = UBYTE_TO_FLOAT(dest[i][GCOMP]);

-            destF[i][BCOMP] = UBYTE_TO_FLOAT(dest[i][BCOMP]);

-            destF[i][ACOMP] = UBYTE_TO_FLOAT(dest[i][ACOMP]);

-         }

-      }

-      /* do blend */

-      blend_general_float(ctx, n, mask, rgbaF, destF, chanType);

-      /* convert back to ubytes */

-      for (i = 0; i < n; i++) {

-         if (mask[i]) {

-            UNCLAMPED_FLOAT_TO_UBYTE(rgba[i][RCOMP], rgbaF[i][RCOMP]);

-            UNCLAMPED_FLOAT_TO_UBYTE(rgba[i][GCOMP], rgbaF[i][GCOMP]);

-            UNCLAMPED_FLOAT_TO_UBYTE(rgba[i][BCOMP], rgbaF[i][BCOMP]);

-            UNCLAMPED_FLOAT_TO_UBYTE(rgba[i][ACOMP], rgbaF[i][ACOMP]);

-         }

-      }

-   }

-   else if (chanType == GL_UNSIGNED_SHORT) {

-      GLushort (*rgba)[4] = (GLushort (*)[4]) src;

-      const GLushort (*dest)[4] = (const GLushort (*)[4]) dst;

-      GLuint i;

-      /* convert ushorts to floats */

-      for (i = 0; i < n; i++) {

-         if (mask[i]) {

-            rgbaF[i][RCOMP] = USHORT_TO_FLOAT(rgba[i][RCOMP]);

-            rgbaF[i][GCOMP] = USHORT_TO_FLOAT(rgba[i][GCOMP]);

-            rgbaF[i][BCOMP] = USHORT_TO_FLOAT(rgba[i][BCOMP]);

-            rgbaF[i][ACOMP] = USHORT_TO_FLOAT(rgba[i][ACOMP]);

-            destF[i][RCOMP] = USHORT_TO_FLOAT(dest[i][RCOMP]);

-            destF[i][GCOMP] = USHORT_TO_FLOAT(dest[i][GCOMP]);

-            destF[i][BCOMP] = USHORT_TO_FLOAT(dest[i][BCOMP]);

-            destF[i][ACOMP] = USHORT_TO_FLOAT(dest[i][ACOMP]);

-         }

-      }

-      /* do blend */

-      blend_general_float(ctx, n, mask, rgbaF, destF, chanType);

-      /* convert back to ushorts */

-      for (i = 0; i < n; i++) {

-         if (mask[i]) {

-            UNCLAMPED_FLOAT_TO_USHORT(rgba[i][RCOMP], rgbaF[i][RCOMP]);

-            UNCLAMPED_FLOAT_TO_USHORT(rgba[i][GCOMP], rgbaF[i][GCOMP]);

-            UNCLAMPED_FLOAT_TO_USHORT(rgba[i][BCOMP], rgbaF[i][BCOMP]);

-            UNCLAMPED_FLOAT_TO_USHORT(rgba[i][ACOMP], rgbaF[i][ACOMP]);

-         }

-      }

-   }

-   else {

-      blend_general_float(ctx, n, mask, (GLfloat (*)[4]) src,

-                          (GLfloat (*)[4]) dst, chanType);

-   }

-

-   free(rgbaF);

-   free(destF);

-}

-

-

-

-/**

- * Analyze current blending parameters to pick fastest blending function.

- * Result: the ctx->Color.BlendFunc pointer is updated.

- */

-void

-_swrast_choose_blend_func(struct gl_context *ctx, GLenum chanType)

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-   const GLenum eq = ctx->Color.Blend[0].EquationRGB;

-   const GLenum srcRGB = ctx->Color.Blend[0].SrcRGB;

-   const GLenum dstRGB = ctx->Color.Blend[0].DstRGB;

-   const GLenum srcA = ctx->Color.Blend[0].SrcA;

-   const GLenum dstA = ctx->Color.Blend[0].DstA;

-

-   if (ctx->Color.Blend[0].EquationRGB != ctx->Color.Blend[0].EquationA) {

-      swrast->BlendFunc = blend_general;

-   }

-   else if (eq == GL_MIN) {

-      /* Note: GL_MIN ignores the blending weight factors */

-#if defined(USE_MMX_ASM)

-      if (cpu_has_mmx && chanType == GL_UNSIGNED_BYTE) {

-         swrast->BlendFunc = _mesa_mmx_blend_min;

-      }

-      else

-#endif

-         swrast->BlendFunc = blend_min;

-   }

-   else if (eq == GL_MAX) {

-      /* Note: GL_MAX ignores the blending weight factors */

-#if defined(USE_MMX_ASM)

-      if (cpu_has_mmx && chanType == GL_UNSIGNED_BYTE) {

-         swrast->BlendFunc = _mesa_mmx_blend_max;

-      }

-      else

-#endif

-         swrast->BlendFunc = blend_max;

-   }

-   else if (srcRGB != srcA || dstRGB != dstA) {

-      swrast->BlendFunc = blend_general;

-   }

-   else if (eq == GL_FUNC_ADD && srcRGB == GL_SRC_ALPHA

-            && dstRGB == GL_ONE_MINUS_SRC_ALPHA) {

-#if defined(USE_MMX_ASM)

-      if (cpu_has_mmx && chanType == GL_UNSIGNED_BYTE) {

-         swrast->BlendFunc = _mesa_mmx_blend_transparency;

-      }

-      else

-#endif

-      {

-         if (chanType == GL_UNSIGNED_BYTE)

-            swrast->BlendFunc = blend_transparency_ubyte;

-         else if (chanType == GL_UNSIGNED_SHORT)

-            swrast->BlendFunc = blend_transparency_ushort;

-         else

-            swrast->BlendFunc = blend_transparency_float;

-      }

-   }

-   else if (eq == GL_FUNC_ADD && srcRGB == GL_ONE && dstRGB == GL_ONE) {

-#if defined(USE_MMX_ASM)

-      if (cpu_has_mmx && chanType == GL_UNSIGNED_BYTE) {

-         swrast->BlendFunc = _mesa_mmx_blend_add;

-      }

-      else

-#endif

-         swrast->BlendFunc = blend_add;

-   }

-   else if (((eq == GL_FUNC_ADD || eq == GL_FUNC_REVERSE_SUBTRACT)

-	     && (srcRGB == GL_ZERO && dstRGB == GL_SRC_COLOR))

-	    ||

-	    ((eq == GL_FUNC_ADD || eq == GL_FUNC_SUBTRACT)

-	     && (srcRGB == GL_DST_COLOR && dstRGB == GL_ZERO))) {

-#if defined(USE_MMX_ASM)

-      if (cpu_has_mmx && chanType == GL_UNSIGNED_BYTE) {

-         swrast->BlendFunc = _mesa_mmx_blend_modulate;

-      }

-      else

-#endif

-         swrast->BlendFunc = blend_modulate;

-   }

-   else if (eq == GL_FUNC_ADD && srcRGB == GL_ZERO && dstRGB == GL_ONE) {

-      swrast->BlendFunc = blend_noop;

-   }

-   else if (eq == GL_FUNC_ADD && srcRGB == GL_ONE && dstRGB == GL_ZERO) {

-      swrast->BlendFunc = blend_replace;

-   }

-   else {

-      swrast->BlendFunc = blend_general;

-   }

-}

-

-

-

-/**

- * Apply the blending operator to a span of pixels.

- * We can handle horizontal runs of pixels (spans) or arrays of x/y

- * pixel coordinates.

- */

-void

-_swrast_blend_span(struct gl_context *ctx, struct gl_renderbuffer *rb, SWspan *span)

-{

-   SWcontext *swrast = SWRAST_CONTEXT(ctx);

-   void *rbPixels;

-

-   ASSERT(span->end <= MAX_WIDTH);

-   ASSERT(span->arrayMask & SPAN_RGBA);

-   ASSERT(rb->DataType == span->array->ChanType);

-   ASSERT(!ctx->Color._LogicOpEnabled);

-

-   rbPixels = _swrast_get_dest_rgba(ctx, rb, span);

-

-   swrast->BlendFunc(ctx, span->end, span->array->mask,

-                     span->array->rgba, rbPixels, span->array->ChanType);

-}

+/*
+ * Mesa 3-D graphics library
+ * Version:  7.1
+ *
+ * Copyright (C) 1999-2008  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.
+ */
+
+
+/**
+ * \file swrast/s_blend.c
+ * \brief software blending.
+ * \author Brian Paul
+ *
+ * Only a few blend modes have been optimized (min, max, transparency, add)
+ * more optimized cases can easily be added if needed.
+ * Celestia uses glBlendFunc(GL_SRC_ALPHA, GL_ONE), for example.
+ */
+
+
+
+#include "main/glheader.h"
+#include "main/context.h"
+#include "main/colormac.h"
+#include "main/macros.h"
+
+#include "s_blend.h"
+#include "s_context.h"
+#include "s_span.h"
+
+
+#if defined(USE_MMX_ASM)
+#include "x86/mmx.h"
+#include "x86/common_x86_asm.h"
+#define _BLENDAPI _ASMAPI
+#else
+#define _BLENDAPI
+#endif
+
+
+/**
+ * Integer divide by 255
+ * Declare "int divtemp" before using.
+ * This satisfies Glean and should be reasonably fast.
+ * Contributed by Nathan Hand.
+ */
+#define DIV255(X)  (divtemp = (X), ((divtemp << 8) + divtemp + 256) >> 16)
+
+
+
+/**
+ * Special case for glBlendFunc(GL_ZERO, GL_ONE).
+ * No-op means the framebuffer values remain unchanged.
+ * Any chanType ok.
+ */
+static void _BLENDAPI
+blend_noop(struct gl_context *ctx, GLuint n, const GLubyte mask[],
+           GLvoid *src, const GLvoid *dst, GLenum chanType)
+{
+   GLint bytes;
+
+   ASSERT(ctx->Color.Blend[0].EquationRGB == GL_FUNC_ADD);
+   ASSERT(ctx->Color.Blend[0].EquationA == GL_FUNC_ADD);
+   ASSERT(ctx->Color.Blend[0].SrcRGB == GL_ZERO);
+   ASSERT(ctx->Color.Blend[0].DstRGB == GL_ONE);
+   (void) ctx;
+
+   /* just memcpy */
+   if (chanType == GL_UNSIGNED_BYTE)
+      bytes = 4 * n * sizeof(GLubyte);
+   else if (chanType == GL_UNSIGNED_SHORT)
+      bytes = 4 * n * sizeof(GLushort);
+   else
+      bytes = 4 * n * sizeof(GLfloat);
+
+   memcpy(src, dst, bytes);
+}
+
+
+/**
+ * Special case for glBlendFunc(GL_ONE, GL_ZERO)
+ * Any chanType ok.
+ */
+static void _BLENDAPI
+blend_replace(struct gl_context *ctx, GLuint n, const GLubyte mask[],
+              GLvoid *src, const GLvoid *dst, GLenum chanType)
+{
+   ASSERT(ctx->Color.Blend[0].EquationRGB == GL_FUNC_ADD);
+   ASSERT(ctx->Color.Blend[0].EquationA == GL_FUNC_ADD);
+   ASSERT(ctx->Color.Blend[0].SrcRGB == GL_ONE);
+   ASSERT(ctx->Color.Blend[0].DstRGB == GL_ZERO);
+   (void) ctx;
+   (void) n;
+   (void) mask;
+   (void) src;
+   (void) dst;
+}
+
+
+/**
+ * Common transparency blending mode:
+ * glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA).
+ */
+static void _BLENDAPI
+blend_transparency_ubyte(struct gl_context *ctx, GLuint n, const GLubyte mask[],
+                         GLvoid *src, const GLvoid *dst, GLenum chanType)
+{
+   GLubyte (*rgba)[4] = (GLubyte (*)[4]) src;
+   const GLubyte (*dest)[4] = (const GLubyte (*)[4]) dst;
+   GLuint i;
+
+   ASSERT(ctx->Color.Blend[0].EquationRGB == GL_FUNC_ADD);
+   ASSERT(ctx->Color.Blend[0].EquationA == GL_FUNC_ADD);
+   ASSERT(ctx->Color.Blend[0].SrcRGB == GL_SRC_ALPHA);
+   ASSERT(ctx->Color.Blend[0].SrcA == GL_SRC_ALPHA);
+   ASSERT(ctx->Color.Blend[0].DstRGB == GL_ONE_MINUS_SRC_ALPHA);
+   ASSERT(ctx->Color.Blend[0].DstA == GL_ONE_MINUS_SRC_ALPHA);
+   ASSERT(chanType == GL_UNSIGNED_BYTE);
+
+   (void) ctx;
+
+   for (i = 0; i < n; i++) {
+      if (mask[i]) {
+         const GLint t = rgba[i][ACOMP];  /* t is in [0, 255] */
+         if (t == 0) {
+            /* 0% alpha */
+            COPY_4UBV(rgba[i], dest[i]);
+         }
+         else if (t != 255) {
+	    GLint divtemp;
+            const GLint r = DIV255((rgba[i][RCOMP] - dest[i][RCOMP]) * t) + dest[i][RCOMP];
+            const GLint g = DIV255((rgba[i][GCOMP] - dest[i][GCOMP]) * t) + dest[i][GCOMP];
+            const GLint b = DIV255((rgba[i][BCOMP] - dest[i][BCOMP]) * t) + dest[i][BCOMP];
+            const GLint a = DIV255((rgba[i][ACOMP] - dest[i][ACOMP]) * t) + dest[i][ACOMP]; 
+            ASSERT(r <= 255);
+            ASSERT(g <= 255);
+            ASSERT(b <= 255);
+            ASSERT(a <= 255);
+            rgba[i][RCOMP] = (GLubyte) r;
+            rgba[i][GCOMP] = (GLubyte) g;
+            rgba[i][BCOMP] = (GLubyte) b;
+            rgba[i][ACOMP] = (GLubyte) a;
+         }
+      }
+   }
+}
+
+
+static void _BLENDAPI
+blend_transparency_ushort(struct gl_context *ctx, GLuint n, const GLubyte mask[],
+                          GLvoid *src, const GLvoid *dst, GLenum chanType)
+{
+   GLushort (*rgba)[4] = (GLushort (*)[4]) src;
+   const GLushort (*dest)[4] = (const GLushort (*)[4]) dst;
+   GLuint i;
+
+   ASSERT(ctx->Color.Blend[0].EquationRGB == GL_FUNC_ADD);
+   ASSERT(ctx->Color.Blend[0].EquationA == GL_FUNC_ADD);
+   ASSERT(ctx->Color.Blend[0].SrcRGB == GL_SRC_ALPHA);
+   ASSERT(ctx->Color.Blend[0].SrcA == GL_SRC_ALPHA);
+   ASSERT(ctx->Color.Blend[0].DstRGB == GL_ONE_MINUS_SRC_ALPHA);
+   ASSERT(ctx->Color.Blend[0].DstA == GL_ONE_MINUS_SRC_ALPHA);
+   ASSERT(chanType == GL_UNSIGNED_SHORT);
+
+   (void) ctx;
+
+   for (i = 0; i < n; i++) {
+      if (mask[i]) {
+         const GLint t = rgba[i][ACOMP];
+         if (t == 0) {
+            /* 0% alpha */
+            COPY_4V(rgba[i], dest[i]);
+         }
+         else if (t != 65535) {
+            const GLfloat tt = (GLfloat) t / 65535.0F;
+            GLushort r = (GLushort) ((rgba[i][RCOMP] - dest[i][RCOMP]) * tt + dest[i][RCOMP]);
+            GLushort g = (GLushort) ((rgba[i][GCOMP] - dest[i][GCOMP]) * tt + dest[i][GCOMP]);
+            GLushort b = (GLushort) ((rgba[i][BCOMP] - dest[i][BCOMP]) * tt + dest[i][BCOMP]);
+            GLushort a = (GLushort) ((rgba[i][ACOMP] - dest[i][ACOMP]) * tt + dest[i][ACOMP]);
+            ASSIGN_4V(rgba[i], r, g, b, a);
+         }
+      }
+   }
+}
+
+
+static void _BLENDAPI
+blend_transparency_float(struct gl_context *ctx, GLuint n, const GLubyte mask[],
+                         GLvoid *src, const GLvoid *dst, GLenum chanType)
+{
+   GLfloat (*rgba)[4] = (GLfloat (*)[4]) src;
+   const GLfloat (*dest)[4] = (const GLfloat (*)[4]) dst;
+   GLuint i;
+
+   ASSERT(ctx->Color.Blend[0].EquationRGB == GL_FUNC_ADD);
+   ASSERT(ctx->Color.Blend[0].EquationA == GL_FUNC_ADD);
+   ASSERT(ctx->Color.Blend[0].SrcRGB == GL_SRC_ALPHA);
+   ASSERT(ctx->Color.Blend[0].SrcA == GL_SRC_ALPHA);
+   ASSERT(ctx->Color.Blend[0].DstRGB == GL_ONE_MINUS_SRC_ALPHA);
+   ASSERT(ctx->Color.Blend[0].DstA == GL_ONE_MINUS_SRC_ALPHA);
+   ASSERT(chanType == GL_FLOAT);
+
+   (void) ctx;
+
+   for (i = 0; i < n; i++) {
+      if (mask[i]) {
+         const GLfloat t = rgba[i][ACOMP];  /* t in [0, 1] */
+         if (t == 0.0F) {
+            /* 0% alpha */
+            COPY_4V(rgba[i], dest[i]);
+         }
+         else if (t != 1.0F) {
+            GLfloat r = (rgba[i][RCOMP] - dest[i][RCOMP]) * t + dest[i][RCOMP];
+            GLfloat g = (rgba[i][GCOMP] - dest[i][GCOMP]) * t + dest[i][GCOMP];
+            GLfloat b = (rgba[i][BCOMP] - dest[i][BCOMP]) * t + dest[i][BCOMP];
+            GLfloat a = (rgba[i][ACOMP] - dest[i][ACOMP]) * t + dest[i][ACOMP];
+            ASSIGN_4V(rgba[i], r, g, b, a);
+         }
+      }
+   }
+}
+
+
+
+/**
+ * Add src and dest: glBlendFunc(GL_ONE, GL_ONE).
+ * Any chanType ok.
+ */
+static void _BLENDAPI
+blend_add(struct gl_context *ctx, GLuint n, const GLubyte mask[],
+          GLvoid *src, const GLvoid *dst, GLenum chanType)
+{
+   GLuint i;
+
+   ASSERT(ctx->Color.Blend[0].EquationRGB == GL_FUNC_ADD);
+   ASSERT(ctx->Color.Blend[0].EquationA == GL_FUNC_ADD);
+   ASSERT(ctx->Color.Blend[0].SrcRGB == GL_ONE);
+   ASSERT(ctx->Color.Blend[0].DstRGB == GL_ONE);
+   (void) ctx;
+
+   if (chanType == GL_UNSIGNED_BYTE) {
+      GLubyte (*rgba)[4] = (GLubyte (*)[4]) src;
+      const GLubyte (*dest)[4] = (const GLubyte (*)[4]) dst;
+      for (i=0;i<n;i++) {
+         if (mask[i]) {
+            GLint r = rgba[i][RCOMP] + dest[i][RCOMP];
+            GLint g = rgba[i][GCOMP] + dest[i][GCOMP];
+            GLint b = rgba[i][BCOMP] + dest[i][BCOMP];
+            GLint a = rgba[i][ACOMP] + dest[i][ACOMP];
+            rgba[i][RCOMP] = (GLubyte) MIN2( r, 255 );
+            rgba[i][GCOMP] = (GLubyte) MIN2( g, 255 );
+            rgba[i][BCOMP] = (GLubyte) MIN2( b, 255 );
+            rgba[i][ACOMP] = (GLubyte) MIN2( a, 255 );
+         }
+      }
+   }
+   else if (chanType == GL_UNSIGNED_SHORT) {
+      GLushort (*rgba)[4] = (GLushort (*)[4]) src;
+      const GLushort (*dest)[4] = (const GLushort (*)[4]) dst;
+      for (i=0;i<n;i++) {
+         if (mask[i]) {
+            GLint r = rgba[i][RCOMP] + dest[i][RCOMP];
+            GLint g = rgba[i][GCOMP] + dest[i][GCOMP];
+            GLint b = rgba[i][BCOMP] + dest[i][BCOMP];
+            GLint a = rgba[i][ACOMP] + dest[i][ACOMP];
+            rgba[i][RCOMP] = (GLshort) MIN2( r, 255 );
+            rgba[i][GCOMP] = (GLshort) MIN2( g, 255 );
+            rgba[i][BCOMP] = (GLshort) MIN2( b, 255 );
+            rgba[i][ACOMP] = (GLshort) MIN2( a, 255 );
+         }
+      }
+   }
+   else {
+      GLfloat (*rgba)[4] = (GLfloat (*)[4]) src;
+      const GLfloat (*dest)[4] = (const GLfloat (*)[4]) dst;
+      ASSERT(chanType == GL_FLOAT);
+      for (i=0;i<n;i++) {
+         if (mask[i]) {
+            /* don't RGB clamp to max */
+            rgba[i][RCOMP] += dest[i][RCOMP];
+            rgba[i][GCOMP] += dest[i][GCOMP];
+            rgba[i][BCOMP] += dest[i][BCOMP];
+            rgba[i][ACOMP] += dest[i][ACOMP];
+         }
+      }
+   }
+}
+
+
+
+/**
+ * Blend min function.
+ * Any chanType ok.
+ */
+static void _BLENDAPI
+blend_min(struct gl_context *ctx, GLuint n, const GLubyte mask[],
+          GLvoid *src, const GLvoid *dst, GLenum chanType)
+{
+   GLuint i;
+   ASSERT(ctx->Color.Blend[0].EquationRGB == GL_MIN);
+   ASSERT(ctx->Color.Blend[0].EquationA == GL_MIN);
+   (void) ctx;
+
+   if (chanType == GL_UNSIGNED_BYTE) {
+      GLubyte (*rgba)[4] = (GLubyte (*)[4]) src;
+      const GLubyte (*dest)[4] = (const GLubyte (*)[4]) dst;
+      for (i=0;i<n;i++) {
+         if (mask[i]) {
+            rgba[i][RCOMP] = MIN2( rgba[i][RCOMP], dest[i][RCOMP] );
+            rgba[i][GCOMP] = MIN2( rgba[i][GCOMP], dest[i][GCOMP] );
+            rgba[i][BCOMP] = MIN2( rgba[i][BCOMP], dest[i][BCOMP] );
+            rgba[i][ACOMP] = MIN2( rgba[i][ACOMP], dest[i][ACOMP] );
+         }
+      }
+   }
+   else if (chanType == GL_UNSIGNED_SHORT) {
+      GLushort (*rgba)[4] = (GLushort (*)[4]) src;
+      const GLushort (*dest)[4] = (const GLushort (*)[4]) dst;
+      for (i=0;i<n;i++) {
+         if (mask[i]) {
+            rgba[i][RCOMP] = MIN2( rgba[i][RCOMP], dest[i][RCOMP] );
+            rgba[i][GCOMP] = MIN2( rgba[i][GCOMP], dest[i][GCOMP] );
+            rgba[i][BCOMP] = MIN2( rgba[i][BCOMP], dest[i][BCOMP] );
+            rgba[i][ACOMP] = MIN2( rgba[i][ACOMP], dest[i][ACOMP] );
+         }
+      }
+   }
+   else {
+      GLfloat (*rgba)[4] = (GLfloat (*)[4]) src;
+      const GLfloat (*dest)[4] = (const GLfloat (*)[4]) dst;
+      ASSERT(chanType == GL_FLOAT);
+      for (i=0;i<n;i++) {
+         if (mask[i]) {
+            rgba[i][RCOMP] = MIN2( rgba[i][RCOMP], dest[i][RCOMP] );
+            rgba[i][GCOMP] = MIN2( rgba[i][GCOMP], dest[i][GCOMP] );
+            rgba[i][BCOMP] = MIN2( rgba[i][BCOMP], dest[i][BCOMP] );
+            rgba[i][ACOMP] = MIN2( rgba[i][ACOMP], dest[i][ACOMP] );
+         }
+      }
+   }
+}
+
+
+/**
+ * Blend max function.
+ * Any chanType ok.
+ */
+static void _BLENDAPI
+blend_max(struct gl_context *ctx, GLuint n, const GLubyte mask[],
+          GLvoid *src, const GLvoid *dst, GLenum chanType)
+{
+   GLuint i;
+   ASSERT(ctx->Color.Blend[0].EquationRGB == GL_MAX);
+   ASSERT(ctx->Color.Blend[0].EquationA == GL_MAX);
+   (void) ctx;
+
+   if (chanType == GL_UNSIGNED_BYTE) {
+      GLubyte (*rgba)[4] = (GLubyte (*)[4]) src;
+      const GLubyte (*dest)[4] = (const GLubyte (*)[4]) dst;
+      for (i=0;i<n;i++) {
+         if (mask[i]) {
+            rgba[i][RCOMP] = MAX2( rgba[i][RCOMP], dest[i][RCOMP] );
+            rgba[i][GCOMP] = MAX2( rgba[i][GCOMP], dest[i][GCOMP] );
+            rgba[i][BCOMP] = MAX2( rgba[i][BCOMP], dest[i][BCOMP] );
+            rgba[i][ACOMP] = MAX2( rgba[i][ACOMP], dest[i][ACOMP] );
+         }
+      }
+   }
+   else if (chanType == GL_UNSIGNED_SHORT) {
+      GLushort (*rgba)[4] = (GLushort (*)[4]) src;
+      const GLushort (*dest)[4] = (const GLushort (*)[4]) dst;
+      for (i=0;i<n;i++) {
+         if (mask[i]) {
+            rgba[i][RCOMP] = MAX2( rgba[i][RCOMP], dest[i][RCOMP] );
+            rgba[i][GCOMP] = MAX2( rgba[i][GCOMP], dest[i][GCOMP] );
+            rgba[i][BCOMP] = MAX2( rgba[i][BCOMP], dest[i][BCOMP] );
+            rgba[i][ACOMP] = MAX2( rgba[i][ACOMP], dest[i][ACOMP] );
+         }
+      }
+   }
+   else {
+      GLfloat (*rgba)[4] = (GLfloat (*)[4]) src;
+      const GLfloat (*dest)[4] = (const GLfloat (*)[4]) dst;
+      ASSERT(chanType == GL_FLOAT);
+      for (i=0;i<n;i++) {
+         if (mask[i]) {
+            rgba[i][RCOMP] = MAX2( rgba[i][RCOMP], dest[i][RCOMP] );
+            rgba[i][GCOMP] = MAX2( rgba[i][GCOMP], dest[i][GCOMP] );
+            rgba[i][BCOMP] = MAX2( rgba[i][BCOMP], dest[i][BCOMP] );
+            rgba[i][ACOMP] = MAX2( rgba[i][ACOMP], dest[i][ACOMP] );
+         }
+      }
+   }
+}
+
+
+
+/**
+ * Modulate:  result = src * dest
+ * Any chanType ok.
+ */
+static void _BLENDAPI
+blend_modulate(struct gl_context *ctx, GLuint n, const GLubyte mask[],
+               GLvoid *src, const GLvoid *dst, GLenum chanType)
+{
+   GLuint i;
+   (void) ctx;
+
+   if (chanType == GL_UNSIGNED_BYTE) {
+      GLubyte (*rgba)[4] = (GLubyte (*)[4]) src;
+      const GLubyte (*dest)[4] = (const GLubyte (*)[4]) dst;
+      for (i=0;i<n;i++) {
+         if (mask[i]) {
+	    GLint divtemp;
+            rgba[i][RCOMP] = DIV255(rgba[i][RCOMP] * dest[i][RCOMP]);
+            rgba[i][GCOMP] = DIV255(rgba[i][GCOMP] * dest[i][GCOMP]);
+            rgba[i][BCOMP] = DIV255(rgba[i][BCOMP] * dest[i][BCOMP]);
+            rgba[i][ACOMP] = DIV255(rgba[i][ACOMP] * dest[i][ACOMP]);
+         }
+      }
+   }
+   else if (chanType == GL_UNSIGNED_SHORT) {
+      GLushort (*rgba)[4] = (GLushort (*)[4]) src;
+      const GLushort (*dest)[4] = (const GLushort (*)[4]) dst;
+      for (i=0;i<n;i++) {
+         if (mask[i]) {
+            rgba[i][RCOMP] = (rgba[i][RCOMP] * dest[i][RCOMP] + 65535) >> 16;
+            rgba[i][GCOMP] = (rgba[i][GCOMP] * dest[i][GCOMP] + 65535) >> 16;
+            rgba[i][BCOMP] = (rgba[i][BCOMP] * dest[i][BCOMP] + 65535) >> 16;
+            rgba[i][ACOMP] = (rgba[i][ACOMP] * dest[i][ACOMP] + 65535) >> 16;
+         }
+      }
+   }
+   else {
+      GLfloat (*rgba)[4] = (GLfloat (*)[4]) src;
+      const GLfloat (*dest)[4] = (const GLfloat (*)[4]) dst;
+      ASSERT(chanType == GL_FLOAT);
+      for (i=0;i<n;i++) {
+         if (mask[i]) {
+            rgba[i][RCOMP] = rgba[i][RCOMP] * dest[i][RCOMP];
+            rgba[i][GCOMP] = rgba[i][GCOMP] * dest[i][GCOMP];
+            rgba[i][BCOMP] = rgba[i][BCOMP] * dest[i][BCOMP];
+            rgba[i][ACOMP] = rgba[i][ACOMP] * dest[i][ACOMP];
+         }
+      }
+   }
+}
+
+
+/**
+ * Do any blending operation, using floating point.
+ * \param n  number of pixels
+ * \param mask  fragment writemask array
+ * \param rgba  array of incoming (and modified) pixels
+ * \param dest  array of pixels from the dest color buffer
+ */
+static void
+blend_general_float(struct gl_context *ctx, GLuint n, const GLubyte mask[],
+                    GLfloat rgba[][4], GLfloat dest[][4],
+                    GLenum chanType)
+{
+   GLuint i;
+
+   for (i = 0; i < n; i++) {
+      if (mask[i]) {
+         /* Incoming/source Color */
+         const GLfloat Rs = rgba[i][RCOMP];
+         const GLfloat Gs = rgba[i][GCOMP];
+         const GLfloat Bs = rgba[i][BCOMP];
+         const GLfloat As = rgba[i][ACOMP];
+
+         /* Frame buffer/dest color */
+         const GLfloat Rd = dest[i][RCOMP];
+         const GLfloat Gd = dest[i][GCOMP];
+         const GLfloat Bd = dest[i][BCOMP];
+         const GLfloat Ad = dest[i][ACOMP];
+
+         GLfloat sR, sG, sB, sA;  /* Source factor */
+         GLfloat dR, dG, dB, dA;  /* Dest factor */
+         GLfloat r, g, b, a;      /* result color */
+
+         /* XXX for the case of constant blend terms we could init
+          * the sX and dX variables just once before the loop.
+          */
+
+         /* Source RGB factor */
+         switch (ctx->Color.Blend[0].SrcRGB) {
+            case GL_ZERO:
+               sR = sG = sB = 0.0F;
+               break;
+            case GL_ONE:
+               sR = sG = sB = 1.0F;
+               break;
+            case GL_DST_COLOR:
+               sR = Rd;
+               sG = Gd;
+               sB = Bd;
+               break;
+            case GL_ONE_MINUS_DST_COLOR:
+               sR = 1.0F - Rd;
+               sG = 1.0F - Gd;
+               sB = 1.0F - Bd;
+               break;
+            case GL_SRC_ALPHA:
+               sR = sG = sB = As;
+               break;
+            case GL_ONE_MINUS_SRC_ALPHA:
+               sR = sG = sB = 1.0F - As;
+               break;
+            case GL_DST_ALPHA:
+               sR = sG = sB = Ad;
+               break;
+            case GL_ONE_MINUS_DST_ALPHA:
+               sR = sG = sB = 1.0F - Ad;
+               break;
+            case GL_SRC_ALPHA_SATURATE:
+               if (As < 1.0F - Ad) {
+                  sR = sG = sB = As;
+               }
+               else {
+                  sR = sG = sB = 1.0F - Ad;
+               }
+               break;
+            case GL_CONSTANT_COLOR:
+               sR = ctx->Color.BlendColor[0];
+               sG = ctx->Color.BlendColor[1];
+               sB = ctx->Color.BlendColor[2];
+               break;
+            case GL_ONE_MINUS_CONSTANT_COLOR:
+               sR = 1.0F - ctx->Color.BlendColor[0];
+               sG = 1.0F - ctx->Color.BlendColor[1];
+               sB = 1.0F - ctx->Color.BlendColor[2];
+               break;
+            case GL_CONSTANT_ALPHA:
+               sR = sG = sB = ctx->Color.BlendColor[3];
+               break;
+            case GL_ONE_MINUS_CONSTANT_ALPHA:
+               sR = sG = sB = 1.0F - ctx->Color.BlendColor[3];
+               break;
+            case GL_SRC_COLOR:
+               sR = Rs;
+               sG = Gs;
+               sB = Bs;
+               break;
+            case GL_ONE_MINUS_SRC_COLOR:
+               sR = 1.0F - Rs;
+               sG = 1.0F - Gs;
+               sB = 1.0F - Bs;
+               break;
+            default:
+               /* this should never happen */
+               _mesa_problem(ctx, "Bad blend source RGB factor in blend_general_float");
+               return;
+         }
+
+         /* Source Alpha factor */
+         switch (ctx->Color.Blend[0].SrcA) {
+            case GL_ZERO:
+               sA = 0.0F;
+               break;
+            case GL_ONE:
+               sA = 1.0F;
+               break;
+            case GL_DST_COLOR:
+               sA = Ad;
+               break;
+            case GL_ONE_MINUS_DST_COLOR:
+               sA = 1.0F - Ad;
+               break;
+            case GL_SRC_ALPHA:
+               sA = As;
+               break;
+            case GL_ONE_MINUS_SRC_ALPHA:
+               sA = 1.0F - As;
+               break;
+            case GL_DST_ALPHA:
+               sA = Ad;
+               break;
+            case GL_ONE_MINUS_DST_ALPHA:
+               sA = 1.0F - Ad;
+               break;
+            case GL_SRC_ALPHA_SATURATE:
+               sA = 1.0;
+               break;
+            case GL_CONSTANT_COLOR:
+               sA = ctx->Color.BlendColor[3];
+               break;
+            case GL_ONE_MINUS_CONSTANT_COLOR:
+               sA = 1.0F - ctx->Color.BlendColor[3];
+               break;
+            case GL_CONSTANT_ALPHA:
+               sA = ctx->Color.BlendColor[3];
+               break;
+            case GL_ONE_MINUS_CONSTANT_ALPHA:
+               sA = 1.0F - ctx->Color.BlendColor[3];
+               break;
+            case GL_SRC_COLOR:
+               sA = As;
+               break;
+            case GL_ONE_MINUS_SRC_COLOR:
+               sA = 1.0F - As;
+               break;
+            default:
+               /* this should never happen */
+               sA = 0.0F;
+               _mesa_problem(ctx, "Bad blend source A factor in blend_general_float");
+               return;
+         }
+
+         /* Dest RGB factor */
+         switch (ctx->Color.Blend[0].DstRGB) {
+            case GL_ZERO:
+               dR = dG = dB = 0.0F;
+               break;
+            case GL_ONE:
+               dR = dG = dB = 1.0F;
+               break;
+            case GL_SRC_COLOR:
+               dR = Rs;
+               dG = Gs;
+               dB = Bs;
+               break;
+            case GL_ONE_MINUS_SRC_COLOR:
+               dR = 1.0F - Rs;
+               dG = 1.0F - Gs;
+               dB = 1.0F - Bs;
+               break;
+            case GL_SRC_ALPHA:
+               dR = dG = dB = As;
+               break;
+            case GL_ONE_MINUS_SRC_ALPHA:
+               dR = dG = dB = 1.0F - As;
+               break;
+            case GL_DST_ALPHA:
+               dR = dG = dB = Ad;
+               break;
+            case GL_ONE_MINUS_DST_ALPHA:
+               dR = dG = dB = 1.0F - Ad;
+               break;
+            case GL_CONSTANT_COLOR:
+               dR = ctx->Color.BlendColor[0];
+               dG = ctx->Color.BlendColor[1];
+               dB = ctx->Color.BlendColor[2];
+               break;
+            case GL_ONE_MINUS_CONSTANT_COLOR:
+               dR = 1.0F - ctx->Color.BlendColor[0];
+               dG = 1.0F - ctx->Color.BlendColor[1];
+               dB = 1.0F - ctx->Color.BlendColor[2];
+               break;
+            case GL_CONSTANT_ALPHA:
+               dR = dG = dB = ctx->Color.BlendColor[3];
+               break;
+            case GL_ONE_MINUS_CONSTANT_ALPHA:
+               dR = dG = dB = 1.0F - ctx->Color.BlendColor[3];
+               break;
+            case GL_DST_COLOR:
+               dR = Rd;
+               dG = Gd;
+               dB = Bd;
+               break;
+            case GL_ONE_MINUS_DST_COLOR:
+               dR = 1.0F - Rd;
+               dG = 1.0F - Gd;
+               dB = 1.0F - Bd;
+               break;
+            default:
+               /* this should never happen */
+               dR = dG = dB = 0.0F;
+               _mesa_problem(ctx, "Bad blend dest RGB factor in blend_general_float");
+               return;
+         }
+
+         /* Dest Alpha factor */
+         switch (ctx->Color.Blend[0].DstA) {
+            case GL_ZERO:
+               dA = 0.0F;
+               break;
+            case GL_ONE:
+               dA = 1.0F;
+               break;
+            case GL_SRC_COLOR:
+               dA = As;
+               break;
+            case GL_ONE_MINUS_SRC_COLOR:
+               dA = 1.0F - As;
+               break;
+            case GL_SRC_ALPHA:
+               dA = As;
+               break;
+            case GL_ONE_MINUS_SRC_ALPHA:
+               dA = 1.0F - As;
+               break;
+            case GL_DST_ALPHA:
+               dA = Ad;
+               break;
+            case GL_ONE_MINUS_DST_ALPHA:
+               dA = 1.0F - Ad;
+               break;
+            case GL_CONSTANT_COLOR:
+               dA = ctx->Color.BlendColor[3];
+               break;
+            case GL_ONE_MINUS_CONSTANT_COLOR:
+               dA = 1.0F - ctx->Color.BlendColor[3];
+               break;
+            case GL_CONSTANT_ALPHA:
+               dA = ctx->Color.BlendColor[3];
+               break;
+            case GL_ONE_MINUS_CONSTANT_ALPHA:
+               dA = 1.0F - ctx->Color.BlendColor[3];
+               break;
+            case GL_DST_COLOR:
+               dA = Ad;
+               break;
+            case GL_ONE_MINUS_DST_COLOR:
+               dA = 1.0F - Ad;
+               break;
+            default:
+               /* this should never happen */
+               dA = 0.0F;
+               _mesa_problem(ctx, "Bad blend dest A factor in blend_general_float");
+               return;
+         }
+
+         /* compute the blended RGB */
+         switch (ctx->Color.Blend[0].EquationRGB) {
+         case GL_FUNC_ADD:
+            r = Rs * sR + Rd * dR;
+            g = Gs * sG + Gd * dG;
+            b = Bs * sB + Bd * dB;
+            a = As * sA + Ad * dA;
+            break;
+         case GL_FUNC_SUBTRACT:
+            r = Rs * sR - Rd * dR;
+            g = Gs * sG - Gd * dG;
+            b = Bs * sB - Bd * dB;
+            a = As * sA - Ad * dA;
+            break;
+         case GL_FUNC_REVERSE_SUBTRACT:
+            r = Rd * dR - Rs * sR;
+            g = Gd * dG - Gs * sG;
+            b = Bd * dB - Bs * sB;
+            a = Ad * dA - As * sA;
+            break;
+         case GL_MIN:
+	    r = MIN2( Rd, Rs );
+	    g = MIN2( Gd, Gs );
+	    b = MIN2( Bd, Bs );
+            break;
+         case GL_MAX:
+	    r = MAX2( Rd, Rs );
+	    g = MAX2( Gd, Gs );
+	    b = MAX2( Bd, Bs );
+            break;
+	 default:
+            /* should never get here */
+            r = g = b = 0.0F;  /* silence uninitialized var warning */
+            _mesa_problem(ctx, "unexpected BlendEquation in blend_general()");
+            return;
+         }
+
+         /* compute the blended alpha */
+         switch (ctx->Color.Blend[0].EquationA) {
+         case GL_FUNC_ADD:
+            a = As * sA + Ad * dA;
+            break;
+         case GL_FUNC_SUBTRACT:
+            a = As * sA - Ad * dA;
+            break;
+         case GL_FUNC_REVERSE_SUBTRACT:
+            a = Ad * dA - As * sA;
+            break;
+         case GL_MIN:
+	    a = MIN2( Ad, As );
+            break;
+         case GL_MAX:
+	    a = MAX2( Ad, As );
+            break;
+         default:
+            /* should never get here */
+            a = 0.0F;  /* silence uninitialized var warning */
+            _mesa_problem(ctx, "unexpected BlendEquation in blend_general()");
+            return;
+         }
+
+         /* final clamping */
+#if 0
+         rgba[i][RCOMP] = MAX2( r, 0.0F );
+         rgba[i][GCOMP] = MAX2( g, 0.0F );
+         rgba[i][BCOMP] = MAX2( b, 0.0F );
+         rgba[i][ACOMP] = CLAMP( a, 0.0F, 1.0F );
+#else
+         ASSIGN_4V(rgba[i], r, g, b, a);
+#endif
+      }
+   }
+}
+
+
+/**
+ * Do any blending operation, any chanType.
+ */
+static void
+blend_general(struct gl_context *ctx, GLuint n, const GLubyte mask[],
+              void *src, const void *dst, GLenum chanType)
+{
+   GLfloat (*rgbaF)[4], (*destF)[4];
+
+   rgbaF = (GLfloat (*)[4]) malloc(4 * n * sizeof(GLfloat));
+   destF = (GLfloat (*)[4]) malloc(4 * n * sizeof(GLfloat));
+   if (!rgbaF || !destF) {
+      free(rgbaF);
+      free(destF);
+      _mesa_error(ctx, GL_OUT_OF_MEMORY, "blending");
+      return;
+   }
+
+   if (chanType == GL_UNSIGNED_BYTE) {
+      GLubyte (*rgba)[4] = (GLubyte (*)[4]) src;
+      const GLubyte (*dest)[4] = (const GLubyte (*)[4]) dst;
+      GLuint i;
+      /* convert ubytes to floats */
+      for (i = 0; i < n; i++) {
+         if (mask[i]) {
+            rgbaF[i][RCOMP] = UBYTE_TO_FLOAT(rgba[i][RCOMP]);
+            rgbaF[i][GCOMP] = UBYTE_TO_FLOAT(rgba[i][GCOMP]);
+            rgbaF[i][BCOMP] = UBYTE_TO_FLOAT(rgba[i][BCOMP]);
+            rgbaF[i][ACOMP] = UBYTE_TO_FLOAT(rgba[i][ACOMP]);
+            destF[i][RCOMP] = UBYTE_TO_FLOAT(dest[i][RCOMP]);
+            destF[i][GCOMP] = UBYTE_TO_FLOAT(dest[i][GCOMP]);
+            destF[i][BCOMP] = UBYTE_TO_FLOAT(dest[i][BCOMP]);
+            destF[i][ACOMP] = UBYTE_TO_FLOAT(dest[i][ACOMP]);
+         }
+      }
+      /* do blend */
+      blend_general_float(ctx, n, mask, rgbaF, destF, chanType);
+      /* convert back to ubytes */
+      for (i = 0; i < n; i++) {
+         if (mask[i])
+	   _mesa_unclamped_float_rgba_to_ubyte(rgba[i], rgbaF[i]);
+      }
+   }
+   else if (chanType == GL_UNSIGNED_SHORT) {
+      GLushort (*rgba)[4] = (GLushort (*)[4]) src;
+      const GLushort (*dest)[4] = (const GLushort (*)[4]) dst;
+      GLuint i;
+      /* convert ushorts to floats */
+      for (i = 0; i < n; i++) {
+         if (mask[i]) {
+            rgbaF[i][RCOMP] = USHORT_TO_FLOAT(rgba[i][RCOMP]);
+            rgbaF[i][GCOMP] = USHORT_TO_FLOAT(rgba[i][GCOMP]);
+            rgbaF[i][BCOMP] = USHORT_TO_FLOAT(rgba[i][BCOMP]);
+            rgbaF[i][ACOMP] = USHORT_TO_FLOAT(rgba[i][ACOMP]);
+            destF[i][RCOMP] = USHORT_TO_FLOAT(dest[i][RCOMP]);
+            destF[i][GCOMP] = USHORT_TO_FLOAT(dest[i][GCOMP]);
+            destF[i][BCOMP] = USHORT_TO_FLOAT(dest[i][BCOMP]);
+            destF[i][ACOMP] = USHORT_TO_FLOAT(dest[i][ACOMP]);
+         }
+      }
+      /* do blend */
+      blend_general_float(ctx, n, mask, rgbaF, destF, chanType);
+      /* convert back to ushorts */
+      for (i = 0; i < n; i++) {
+         if (mask[i]) {
+            UNCLAMPED_FLOAT_TO_USHORT(rgba[i][RCOMP], rgbaF[i][RCOMP]);
+            UNCLAMPED_FLOAT_TO_USHORT(rgba[i][GCOMP], rgbaF[i][GCOMP]);
+            UNCLAMPED_FLOAT_TO_USHORT(rgba[i][BCOMP], rgbaF[i][BCOMP]);
+            UNCLAMPED_FLOAT_TO_USHORT(rgba[i][ACOMP], rgbaF[i][ACOMP]);
+         }
+      }
+   }
+   else {
+      blend_general_float(ctx, n, mask, (GLfloat (*)[4]) src,
+                          (GLfloat (*)[4]) dst, chanType);
+   }
+
+   free(rgbaF);
+   free(destF);
+}
+
+
+
+/**
+ * Analyze current blending parameters to pick fastest blending function.
+ * Result: the ctx->Color.BlendFunc pointer is updated.
+ */
+void
+_swrast_choose_blend_func(struct gl_context *ctx, GLenum chanType)
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   const GLenum eq = ctx->Color.Blend[0].EquationRGB;
+   const GLenum srcRGB = ctx->Color.Blend[0].SrcRGB;
+   const GLenum dstRGB = ctx->Color.Blend[0].DstRGB;
+   const GLenum srcA = ctx->Color.Blend[0].SrcA;
+   const GLenum dstA = ctx->Color.Blend[0].DstA;
+
+   if (ctx->Color.Blend[0].EquationRGB != ctx->Color.Blend[0].EquationA) {
+      swrast->BlendFunc = blend_general;
+   }
+   else if (eq == GL_MIN) {
+      /* Note: GL_MIN ignores the blending weight factors */
+#if defined(USE_MMX_ASM)
+      if (cpu_has_mmx && chanType == GL_UNSIGNED_BYTE) {
+         swrast->BlendFunc = _mesa_mmx_blend_min;
+      }
+      else
+#endif
+         swrast->BlendFunc = blend_min;
+   }
+   else if (eq == GL_MAX) {
+      /* Note: GL_MAX ignores the blending weight factors */
+#if defined(USE_MMX_ASM)
+      if (cpu_has_mmx && chanType == GL_UNSIGNED_BYTE) {
+         swrast->BlendFunc = _mesa_mmx_blend_max;
+      }
+      else
+#endif
+         swrast->BlendFunc = blend_max;
+   }
+   else if (srcRGB != srcA || dstRGB != dstA) {
+      swrast->BlendFunc = blend_general;
+   }
+   else if (eq == GL_FUNC_ADD && srcRGB == GL_SRC_ALPHA
+            && dstRGB == GL_ONE_MINUS_SRC_ALPHA) {
+#if defined(USE_MMX_ASM)
+      if (cpu_has_mmx && chanType == GL_UNSIGNED_BYTE) {
+         swrast->BlendFunc = _mesa_mmx_blend_transparency;
+      }
+      else
+#endif
+      {
+         if (chanType == GL_UNSIGNED_BYTE)
+            swrast->BlendFunc = blend_transparency_ubyte;
+         else if (chanType == GL_UNSIGNED_SHORT)
+            swrast->BlendFunc = blend_transparency_ushort;
+         else
+            swrast->BlendFunc = blend_transparency_float;
+      }
+   }
+   else if (eq == GL_FUNC_ADD && srcRGB == GL_ONE && dstRGB == GL_ONE) {
+#if defined(USE_MMX_ASM)
+      if (cpu_has_mmx && chanType == GL_UNSIGNED_BYTE) {
+         swrast->BlendFunc = _mesa_mmx_blend_add;
+      }
+      else
+#endif
+         swrast->BlendFunc = blend_add;
+   }
+   else if (((eq == GL_FUNC_ADD || eq == GL_FUNC_REVERSE_SUBTRACT)
+	     && (srcRGB == GL_ZERO && dstRGB == GL_SRC_COLOR))
+	    ||
+	    ((eq == GL_FUNC_ADD || eq == GL_FUNC_SUBTRACT)
+	     && (srcRGB == GL_DST_COLOR && dstRGB == GL_ZERO))) {
+#if defined(USE_MMX_ASM)
+      if (cpu_has_mmx && chanType == GL_UNSIGNED_BYTE) {
+         swrast->BlendFunc = _mesa_mmx_blend_modulate;
+      }
+      else
+#endif
+         swrast->BlendFunc = blend_modulate;
+   }
+   else if (eq == GL_FUNC_ADD && srcRGB == GL_ZERO && dstRGB == GL_ONE) {
+      swrast->BlendFunc = blend_noop;
+   }
+   else if (eq == GL_FUNC_ADD && srcRGB == GL_ONE && dstRGB == GL_ZERO) {
+      swrast->BlendFunc = blend_replace;
+   }
+   else {
+      swrast->BlendFunc = blend_general;
+   }
+}
+
+
+
+/**
+ * Apply the blending operator to a span of pixels.
+ * We can handle horizontal runs of pixels (spans) or arrays of x/y
+ * pixel coordinates.
+ */
+void
+_swrast_blend_span(struct gl_context *ctx, struct gl_renderbuffer *rb, SWspan *span)
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   void *rbPixels;
+
+   ASSERT(span->end <= MAX_WIDTH);
+   ASSERT(span->arrayMask & SPAN_RGBA);
+   ASSERT(rb->DataType == span->array->ChanType);
+   ASSERT(!ctx->Color._LogicOpEnabled);
+
+   rbPixels = _swrast_get_dest_rgba(ctx, rb, span);
+
+   swrast->BlendFunc(ctx, span->end, span->array->mask,
+                     span->array->rgba, rbPixels, span->array->ChanType);
+}
diff --git a/mesalib/src/mesa/swrast/s_clear.c b/mesalib/src/mesa/swrast/s_clear.c
index 9e9b53116..980d29bba 100644
--- a/mesalib/src/mesa/swrast/s_clear.c
+++ b/mesalib/src/mesa/swrast/s_clear.c
@@ -60,20 +60,17 @@ clear_rgba_buffer_with_masking(struct gl_context *ctx, struct gl_renderbuffer *r
    span.array->ChanType = rb->DataType;
    if (span.array->ChanType == GL_UNSIGNED_BYTE) {
       GLubyte clearColor[4];
-      UNCLAMPED_FLOAT_TO_UBYTE(clearColor[RCOMP], ctx->Color.ClearColor[0]);
-      UNCLAMPED_FLOAT_TO_UBYTE(clearColor[GCOMP], ctx->Color.ClearColor[1]);
-      UNCLAMPED_FLOAT_TO_UBYTE(clearColor[BCOMP], ctx->Color.ClearColor[2]);
-      UNCLAMPED_FLOAT_TO_UBYTE(clearColor[ACOMP], ctx->Color.ClearColor[3]);
+      _mesa_unclamped_float_rgba_to_ubyte(clearColor, ctx->Color.ClearColor.f);
       for (i = 0; i < width; i++) {
          COPY_4UBV(span.array->rgba[i], clearColor);
       }
    }
    else if (span.array->ChanType == GL_UNSIGNED_SHORT) {
       GLushort clearColor[4];
-      UNCLAMPED_FLOAT_TO_USHORT(clearColor[RCOMP], ctx->Color.ClearColor[0]);
-      UNCLAMPED_FLOAT_TO_USHORT(clearColor[GCOMP], ctx->Color.ClearColor[1]);
-      UNCLAMPED_FLOAT_TO_USHORT(clearColor[BCOMP], ctx->Color.ClearColor[2]);
-      UNCLAMPED_FLOAT_TO_USHORT(clearColor[ACOMP], ctx->Color.ClearColor[3]);
+      UNCLAMPED_FLOAT_TO_USHORT(clearColor[RCOMP], ctx->Color.ClearColor.f[0]);
+      UNCLAMPED_FLOAT_TO_USHORT(clearColor[GCOMP], ctx->Color.ClearColor.f[1]);
+      UNCLAMPED_FLOAT_TO_USHORT(clearColor[BCOMP], ctx->Color.ClearColor.f[2]);
+      UNCLAMPED_FLOAT_TO_USHORT(clearColor[ACOMP], ctx->Color.ClearColor.f[3]);
       for (i = 0; i < width; i++) {
          COPY_4V_CAST(span.array->rgba[i], clearColor, GLchan);
       }
@@ -81,10 +78,10 @@ clear_rgba_buffer_with_masking(struct gl_context *ctx, struct gl_renderbuffer *r
    else {
       ASSERT(span.array->ChanType == GL_FLOAT);
       for (i = 0; i < width; i++) {
-         CLAMPED_FLOAT_TO_CHAN(span.array->rgba[i][0], ctx->Color.ClearColor[0]);
-         CLAMPED_FLOAT_TO_CHAN(span.array->rgba[i][1], ctx->Color.ClearColor[1]);
-         CLAMPED_FLOAT_TO_CHAN(span.array->rgba[i][2], ctx->Color.ClearColor[2]);
-         CLAMPED_FLOAT_TO_CHAN(span.array->rgba[i][3], ctx->Color.ClearColor[3]);
+         UNCLAMPED_FLOAT_TO_CHAN(span.array->rgba[i][0], ctx->Color.ClearColor.f[0]);
+         UNCLAMPED_FLOAT_TO_CHAN(span.array->rgba[i][1], ctx->Color.ClearColor.f[1]);
+         UNCLAMPED_FLOAT_TO_CHAN(span.array->rgba[i][2], ctx->Color.ClearColor.f[2]);
+         UNCLAMPED_FLOAT_TO_CHAN(span.array->rgba[i][3], ctx->Color.ClearColor.f[3]);
       }
    }
 
@@ -115,6 +112,7 @@ clear_rgba_buffer(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint buf
    GLubyte clear8[4];
    GLushort clear16[4];
    GLvoid *clearVal;
+   GLfloat clearFloat[4];
    GLint i;
 
    ASSERT(ctx->Color.ColorMask[buf][0] &&
@@ -126,21 +124,22 @@ clear_rgba_buffer(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint buf
 
    switch (rb->DataType) {
       case GL_UNSIGNED_BYTE:
-         UNCLAMPED_FLOAT_TO_UBYTE(clear8[0], ctx->Color.ClearColor[0]);
-         UNCLAMPED_FLOAT_TO_UBYTE(clear8[1], ctx->Color.ClearColor[1]);
-         UNCLAMPED_FLOAT_TO_UBYTE(clear8[2], ctx->Color.ClearColor[2]);
-         UNCLAMPED_FLOAT_TO_UBYTE(clear8[3], ctx->Color.ClearColor[3]);
+         _mesa_unclamped_float_rgba_to_ubyte(clear8, ctx->Color.ClearColor.f);
          clearVal = clear8;
          break;
       case GL_UNSIGNED_SHORT:
-         UNCLAMPED_FLOAT_TO_USHORT(clear16[0], ctx->Color.ClearColor[0]);
-         UNCLAMPED_FLOAT_TO_USHORT(clear16[1], ctx->Color.ClearColor[1]);
-         UNCLAMPED_FLOAT_TO_USHORT(clear16[2], ctx->Color.ClearColor[2]);
-         UNCLAMPED_FLOAT_TO_USHORT(clear16[3], ctx->Color.ClearColor[3]);
+         UNCLAMPED_FLOAT_TO_USHORT(clear16[0], ctx->Color.ClearColor.f[0]);
+         UNCLAMPED_FLOAT_TO_USHORT(clear16[1], ctx->Color.ClearColor.f[1]);
+         UNCLAMPED_FLOAT_TO_USHORT(clear16[2], ctx->Color.ClearColor.f[2]);
+         UNCLAMPED_FLOAT_TO_USHORT(clear16[3], ctx->Color.ClearColor.f[3]);
          clearVal = clear16;
          break;
       case GL_FLOAT:
-         clearVal = ctx->Color.ClearColor;
+         clearFloat[0] = CLAMP(ctx->Color.ClearColor.f[0], 0.0F, 1.0F);
+         clearFloat[1] = CLAMP(ctx->Color.ClearColor.f[1], 0.0F, 1.0F);
+         clearFloat[2] = CLAMP(ctx->Color.ClearColor.f[2], 0.0F, 1.0F);
+         clearFloat[3] = CLAMP(ctx->Color.ClearColor.f[3], 0.0F, 1.0F);
+         clearVal = clearFloat;
          break;
       default:
          _mesa_problem(ctx, "Bad rb DataType in clear_color_buffer");