svn merge ^/branches/released . --username marha

1 files changed, 592 insertions, 0 deletions

diff --git a/mesalib/src/mesa/main/blend.c b/mesalib/src/mesa/main/blend.c
new file mode 100644
index 000000000..39cf6153e
--- /dev/null
+++ b/mesalib/src/mesa/main/blend.c
@@ -0,0 +1,592 @@
+/**
+ * \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"
+#include "glapi/glapitable.h"
+
+
+/**
+ * Specify the blending operation.
+ *
+ * \param sfactor source factor operator.
+ * \param dfactor destination factor operator.
+ *
+ * \sa glBlendFunc, glBlendFuncSeparateEXT
+ */
+void GLAPIENTRY
+_mesa_BlendFunc( GLenum sfactor, GLenum dfactor )
+{
+   _mesa_BlendFuncSeparateEXT(sfactor, dfactor, sfactor, dfactor);
+}
+
+
+/**
+ * Process GL_EXT_blend_func_separate().
+ *
+ * \param sfactorRGB RGB source factor operator.
+ * \param dfactorRGB RGB destination factor operator.
+ * \param sfactorA alpha source factor operator.
+ * \param dfactorA alpha destination factor operator.
+ *
+ * Verifies the parameters and updates gl_colorbuffer_attrib.
+ * On a change, flush the vertices and notify the driver via
+ * dd_function_table::BlendFuncSeparate.
+ */
+void GLAPIENTRY
+_mesa_BlendFuncSeparateEXT( GLenum sfactorRGB, GLenum dfactorRGB,
+                            GLenum sfactorA, GLenum dfactorA )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   if (MESA_VERBOSE & (VERBOSE_API|VERBOSE_TEXTURE))
+      _mesa_debug(ctx, "glBlendFuncSeparate %s %s %s %s\n",
+                  _mesa_lookup_enum_by_nr(sfactorRGB),
+                  _mesa_lookup_enum_by_nr(dfactorRGB),
+                  _mesa_lookup_enum_by_nr(sfactorA),
+                  _mesa_lookup_enum_by_nr(dfactorA));
+
+   switch (sfactorRGB) {
+      case GL_SRC_COLOR:
+      case GL_ONE_MINUS_SRC_COLOR:
+         if (!ctx->Extensions.NV_blend_square) {
+            _mesa_error(ctx, GL_INVALID_ENUM, "glBlendFunc or glBlendFuncSeparate (sfactorRGB)");
+            return;
+         }
+         /* fall-through */
+      case GL_ZERO:
+      case GL_ONE:
+      case GL_DST_COLOR:
+      case GL_ONE_MINUS_DST_COLOR:
+      case GL_SRC_ALPHA:
+      case GL_ONE_MINUS_SRC_ALPHA:
+      case GL_DST_ALPHA:
+      case GL_ONE_MINUS_DST_ALPHA:
+      case GL_SRC_ALPHA_SATURATE:
+      case GL_CONSTANT_COLOR:
+      case GL_ONE_MINUS_CONSTANT_COLOR:
+      case GL_CONSTANT_ALPHA:
+      case GL_ONE_MINUS_CONSTANT_ALPHA:
+         break;
+      default:
+         _mesa_error(ctx, GL_INVALID_ENUM, "glBlendFunc or glBlendFuncSeparate (sfactorRGB)");
+         return;
+   }
+
+   switch (dfactorRGB) {
+      case GL_DST_COLOR:
+      case GL_ONE_MINUS_DST_COLOR:
+         if (!ctx->Extensions.NV_blend_square) {
+            _mesa_error(ctx, GL_INVALID_ENUM, "glBlendFunc or glBlendFuncSeparate (dfactorRGB)");
+            return;
+         }
+         /* fall-through */
+      case GL_ZERO:
+      case GL_ONE:
+      case GL_SRC_COLOR:
+      case GL_ONE_MINUS_SRC_COLOR:
+      case GL_SRC_ALPHA:
+      case GL_ONE_MINUS_SRC_ALPHA:
+      case GL_DST_ALPHA:
+      case GL_ONE_MINUS_DST_ALPHA:
+      case GL_CONSTANT_COLOR:
+      case GL_ONE_MINUS_CONSTANT_COLOR:
+      case GL_CONSTANT_ALPHA:
+      case GL_ONE_MINUS_CONSTANT_ALPHA:
+         break;
+      default:
+         _mesa_error(ctx, GL_INVALID_ENUM, "glBlendFunc or glBlendFuncSeparate (dfactorRGB)");
+         return;
+   }
+
+   switch (sfactorA) {
+      case GL_SRC_COLOR:
+      case GL_ONE_MINUS_SRC_COLOR:
+         if (!ctx->Extensions.NV_blend_square) {
+            _mesa_error(ctx, GL_INVALID_ENUM, "glBlendFunc or glBlendFuncSeparate (sfactorA)");
+            return;
+         }
+         /* fall-through */
+      case GL_ZERO:
+      case GL_ONE:
+      case GL_DST_COLOR:
+      case GL_ONE_MINUS_DST_COLOR:
+      case GL_SRC_ALPHA:
+      case GL_ONE_MINUS_SRC_ALPHA:
+      case GL_DST_ALPHA:
+      case GL_ONE_MINUS_DST_ALPHA:
+      case GL_SRC_ALPHA_SATURATE:
+      case GL_CONSTANT_COLOR:
+      case GL_ONE_MINUS_CONSTANT_COLOR:
+      case GL_CONSTANT_ALPHA:
+      case GL_ONE_MINUS_CONSTANT_ALPHA:
+         break;
+      default:
+         _mesa_error(ctx, GL_INVALID_ENUM, "glBlendFunc or glBlendFuncSeparate (sfactorA)");
+         return;
+   }
+
+   switch (dfactorA) {
+      case GL_DST_COLOR:
+      case GL_ONE_MINUS_DST_COLOR:
+         if (!ctx->Extensions.NV_blend_square) {
+            _mesa_error(ctx, GL_INVALID_ENUM, "glBlendFunc or glBlendFuncSeparate (dfactorA)");
+            return;
+         }
+         /* fall-through */
+      case GL_ZERO:
+      case GL_ONE:
+      case GL_SRC_COLOR:
+      case GL_ONE_MINUS_SRC_COLOR:
+      case GL_SRC_ALPHA:
+      case GL_ONE_MINUS_SRC_ALPHA:
+      case GL_DST_ALPHA:
+      case GL_ONE_MINUS_DST_ALPHA:
+      case GL_CONSTANT_COLOR:
+      case GL_ONE_MINUS_CONSTANT_COLOR:
+      case GL_CONSTANT_ALPHA:
+      case GL_ONE_MINUS_CONSTANT_ALPHA:
+         break;
+      default:
+         _mesa_error( ctx, GL_INVALID_ENUM, "glBlendFunc or glBlendFuncSeparate (dfactorA)" );
+         return;
+   }
+
+   if (ctx->Color.BlendSrcRGB == sfactorRGB &&
+       ctx->Color.BlendDstRGB == dfactorRGB &&
+       ctx->Color.BlendSrcA == sfactorA &&
+       ctx->Color.BlendDstA == dfactorA)
+      return;
+
+   FLUSH_VERTICES(ctx, _NEW_COLOR);
+
+   ctx->Color.BlendSrcRGB = sfactorRGB;
+   ctx->Color.BlendDstRGB = dfactorRGB;
+   ctx->Color.BlendSrcA = sfactorA;
+   ctx->Color.BlendDstA = dfactorA;
+
+   if (ctx->Driver.BlendFuncSeparate) {
+      (*ctx->Driver.BlendFuncSeparate)( ctx, sfactorRGB, dfactorRGB,
+					sfactorA, dfactorA );
+   }
+}
+
+
+#if _HAVE_FULL_GL
+
+static GLboolean
+_mesa_validate_blend_equation( GLcontext *ctx,
+			       GLenum mode, GLboolean is_separate )
+{
+   switch (mode) {
+      case GL_FUNC_ADD:
+         break;
+      case GL_MIN:
+      case GL_MAX:
+         if (!ctx->Extensions.EXT_blend_minmax &&
+             !ctx->Extensions.ARB_imaging) {
+            return GL_FALSE;
+         }
+         break;
+      /* glBlendEquationSeparate cannot take GL_LOGIC_OP as a parameter.
+       */
+      case GL_LOGIC_OP:
+         if (!ctx->Extensions.EXT_blend_logic_op || is_separate) {
+            return GL_FALSE;
+         }
+         break;
+      case GL_FUNC_SUBTRACT:
+      case GL_FUNC_REVERSE_SUBTRACT:
+         if (!ctx->Extensions.EXT_blend_subtract &&
+             !ctx->Extensions.ARB_imaging) {
+            return GL_FALSE;
+         }
+         break;
+      default:
+         return GL_FALSE;
+   }
+
+   return GL_TRUE;
+}
+
+
+/* This is really an extension function! */
+void GLAPIENTRY
+_mesa_BlendEquation( GLenum mode )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   if (MESA_VERBOSE & (VERBOSE_API|VERBOSE_TEXTURE))
+      _mesa_debug(ctx, "glBlendEquation %s\n",
+                  _mesa_lookup_enum_by_nr(mode));
+
+   if ( ! _mesa_validate_blend_equation( ctx, mode, GL_FALSE ) ) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glBlendEquation");
+      return;
+   }
+
+   if ( (ctx->Color.BlendEquationRGB == mode) &&
+	(ctx->Color.BlendEquationA == mode) )
+      return;
+
+   FLUSH_VERTICES(ctx, _NEW_COLOR);
+   ctx->Color.BlendEquationRGB = mode;
+   ctx->Color.BlendEquationA = mode;
+
+   if (ctx->Driver.BlendEquationSeparate)
+      (*ctx->Driver.BlendEquationSeparate)( ctx, mode, mode );
+}
+
+
+void GLAPIENTRY
+_mesa_BlendEquationSeparateEXT( GLenum modeRGB, GLenum modeA )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   if (MESA_VERBOSE & (VERBOSE_API|VERBOSE_TEXTURE))
+      _mesa_debug(ctx, "glBlendEquationSeparateEXT %s %s\n",
+                  _mesa_lookup_enum_by_nr(modeRGB),
+                  _mesa_lookup_enum_by_nr(modeA));
+
+   if ( (modeRGB != modeA) && !ctx->Extensions.EXT_blend_equation_separate ) {
+      _mesa_error(ctx, GL_INVALID_OPERATION,
+		  "glBlendEquationSeparateEXT not supported by driver");
+      return;
+   }
+
+   if ( ! _mesa_validate_blend_equation( ctx, modeRGB, GL_TRUE ) ) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glBlendEquationSeparateEXT(modeRGB)");
+      return;
+   }
+
+   if ( ! _mesa_validate_blend_equation( ctx, modeA, GL_TRUE ) ) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glBlendEquationSeparateEXT(modeA)");
+      return;
+   }
+
+
+   if ( (ctx->Color.BlendEquationRGB == modeRGB) &&
+	(ctx->Color.BlendEquationA == modeA) )
+      return;
+
+   FLUSH_VERTICES(ctx, _NEW_COLOR);
+   ctx->Color.BlendEquationRGB = modeRGB;
+   ctx->Color.BlendEquationA = modeA;
+
+   if (ctx->Driver.BlendEquationSeparate)
+      (*ctx->Driver.BlendEquationSeparate)( ctx, modeRGB, modeA );
+}
+#endif
+
+
+/**
+ * Set the blending color.
+ *
+ * \param red red color component.
+ * \param green green color component.
+ * \param blue blue color component.
+ * \param alpha alpha color component.
+ *
+ * \sa glBlendColor().
+ *
+ * Clamps the parameters and updates gl_colorbuffer_attrib::BlendColor.  On a
+ * change, flushes the vertices and notifies the driver via
+ * dd_function_table::BlendColor callback.
+ */
+void GLAPIENTRY
+_mesa_BlendColor( GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha )
+{
+   GLfloat tmp[4];
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   tmp[0] = CLAMP( red,   0.0F, 1.0F );
+   tmp[1] = CLAMP( green, 0.0F, 1.0F );
+   tmp[2] = CLAMP( blue,  0.0F, 1.0F );
+   tmp[3] = CLAMP( alpha, 0.0F, 1.0F );
+
+   if (TEST_EQ_4V(tmp, ctx->Color.BlendColor))
+      return;
+
+   FLUSH_VERTICES(ctx, _NEW_COLOR);
+   COPY_4FV( ctx->Color.BlendColor, tmp );
+
+   if (ctx->Driver.BlendColor)
+      (*ctx->Driver.BlendColor)(ctx, tmp);
+}
+
+
+/**
+ * Specify the alpha test function.
+ *
+ * \param func alpha comparison function.
+ * \param ref reference value.
+ *
+ * Verifies the parameters and updates gl_colorbuffer_attrib. 
+ * On a change, flushes the vertices and notifies the driver via
+ * dd_function_table::AlphaFunc callback.
+ */
+void GLAPIENTRY
+_mesa_AlphaFunc( GLenum func, GLclampf ref )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   switch (func) {
+   case GL_NEVER:
+   case GL_LESS:
+   case GL_EQUAL:
+   case GL_LEQUAL:
+   case GL_GREATER:
+   case GL_NOTEQUAL:
+   case GL_GEQUAL:
+   case GL_ALWAYS:
+      ref = CLAMP(ref, 0.0F, 1.0F);
+
+      if (ctx->Color.AlphaFunc == func && ctx->Color.AlphaRef == ref)
+         return; /* no change */
+
+      FLUSH_VERTICES(ctx, _NEW_COLOR);
+      ctx->Color.AlphaFunc = func;
+      ctx->Color.AlphaRef = ref;
+
+      if (ctx->Driver.AlphaFunc)
+         ctx->Driver.AlphaFunc(ctx, func, ref);
+      return;
+
+   default:
+      _mesa_error( ctx, GL_INVALID_ENUM, "glAlphaFunc(func)" );
+      return;
+   }
+}
+
+
+/**
+ * Specify a logic pixel operation for color index rendering.
+ *
+ * \param opcode operation.
+ *
+ * Verifies that \p opcode is a valid enum and updates
+gl_colorbuffer_attrib::LogicOp.
+ * On a change, flushes the vertices and notifies the driver via the
+ * dd_function_table::LogicOpcode callback.
+ */
+void GLAPIENTRY
+_mesa_LogicOp( GLenum opcode )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   switch (opcode) {
+      case GL_CLEAR:
+      case GL_SET:
+      case GL_COPY:
+      case GL_COPY_INVERTED:
+      case GL_NOOP:
+      case GL_INVERT:
+      case GL_AND:
+      case GL_NAND:
+      case GL_OR:
+      case GL_NOR:
+      case GL_XOR:
+      case GL_EQUIV:
+      case GL_AND_REVERSE:
+      case GL_AND_INVERTED:
+      case GL_OR_REVERSE:
+      case GL_OR_INVERTED:
+	 break;
+      default:
+         _mesa_error( ctx, GL_INVALID_ENUM, "glLogicOp" );
+	 return;
+   }
+
+   if (ctx->Color.LogicOp == opcode)
+      return;
+
+   FLUSH_VERTICES(ctx, _NEW_COLOR);
+   ctx->Color.LogicOp = opcode;
+
+   if (ctx->Driver.LogicOpcode)
+      ctx->Driver.LogicOpcode( ctx, opcode );
+}
+
+#if _HAVE_FULL_GL
+void GLAPIENTRY
+_mesa_IndexMask( GLuint mask )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   if (ctx->Color.IndexMask == mask)
+      return;
+
+   FLUSH_VERTICES(ctx, _NEW_COLOR);
+   ctx->Color.IndexMask = mask;
+
+   if (ctx->Driver.IndexMask)
+      ctx->Driver.IndexMask( ctx, 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];
+   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;
+
+   if (TEST_EQ_4UBV(tmp, ctx->Color.ColorMask))
+      return;
+
+   FLUSH_VERTICES(ctx, _NEW_COLOR);
+   COPY_4UBV(ctx->Color.ColorMask, tmp);
+
+   if (ctx->Driver.ColorMask)
+      ctx->Driver.ColorMask( ctx, red, green, blue, alpha );
+}
+
+
+extern void GLAPIENTRY
+_mesa_ClampColorARB(GLenum target, GLenum clamp)
+{
+   GET_CURRENT_CONTEXT(ctx);
+
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   if (clamp != GL_TRUE && clamp != GL_FALSE && clamp != GL_FIXED_ONLY_ARB) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glClampColorARB(clamp)");
+      return;
+   }
+
+   switch (target) {
+   case GL_CLAMP_VERTEX_COLOR_ARB:
+      ctx->Light.ClampVertexColor = clamp;
+      break;
+   case GL_CLAMP_FRAGMENT_COLOR_ARB:
+      ctx->Color.ClampFragmentColor = clamp;
+      break;
+   case GL_CLAMP_READ_COLOR_ARB:
+      ctx->Color.ClampReadColor = clamp;
+      break;
+   default:
+      _mesa_error(ctx, GL_INVALID_ENUM, "glClampColorARB(target)");
+      return;
+   }
+}
+
+
+
+
+/**********************************************************************/
+/** \name Initialization */
+/*@{*/
+
+/**
+ * Initialization of the context's Color attribute group.
+ *
+ * \param ctx GL context.
+ *
+ * Initializes the related fields in the context color attribute group,
+ * __GLcontextRec::Color.
+ */
+void _mesa_init_color( GLcontext * ctx )
+{
+   /* Color buffer group */
+   ctx->Color.IndexMask = ~0u;
+   ctx->Color.ColorMask[0] = 0xff;
+   ctx->Color.ColorMask[1] = 0xff;
+   ctx->Color.ColorMask[2] = 0xff;
+   ctx->Color.ColorMask[3] = 0xff;
+   ctx->Color.ClearIndex = 0;
+   ASSIGN_4V( ctx->Color.ClearColor, 0, 0, 0, 0 );
+   ctx->Color.AlphaEnabled = GL_FALSE;
+   ctx->Color.AlphaFunc = GL_ALWAYS;
+   ctx->Color.AlphaRef = 0;
+   ctx->Color.BlendEnabled = GL_FALSE;
+   ctx->Color.BlendSrcRGB = GL_ONE;
+   ctx->Color.BlendDstRGB = GL_ZERO;
+   ctx->Color.BlendSrcA = GL_ONE;
+   ctx->Color.BlendDstA = GL_ZERO;
+   ctx->Color.BlendEquationRGB = GL_FUNC_ADD;
+   ctx->Color.BlendEquationA = GL_FUNC_ADD;
+   ASSIGN_4V( ctx->Color.BlendColor, 0.0, 0.0, 0.0, 0.0 );
+   ctx->Color.IndexLogicOpEnabled = GL_FALSE;
+   ctx->Color.ColorLogicOpEnabled = GL_FALSE;
+   ctx->Color._LogicOpEnabled = GL_FALSE;
+   ctx->Color.LogicOp = GL_COPY;
+   ctx->Color.DitherFlag = GL_TRUE;
+
+   if (ctx->Visual.doubleBufferMode) {
+      ctx->Color.DrawBuffer[0] = GL_BACK;
+   }
+   else {
+      ctx->Color.DrawBuffer[0] = GL_FRONT;
+   }
+
+   ctx->Color.ClampFragmentColor = GL_FIXED_ONLY_ARB;
+   ctx->Color.ClampReadColor = GL_FIXED_ONLY_ARB;
+}
+
+/*@}*/