X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=src%2Fmesa%2Fmain%2Fblend.c;h=5cd3ce24425ce3c0a125690069f7b9bdd21f3f72;hb=298d7a20e1fb5eeed9832ea34f674e12aca59f4c;hp=b1ab7c5f288e19bf6b98a6674279eee8a3ac557b;hpb=ba643a2094a1e844b6ce60f468057057557859ce;p=mesa.git diff --git a/src/mesa/main/blend.c b/src/mesa/main/blend.c index b1ab7c5f288..5cd3ce24425 100644 --- a/src/mesa/main/blend.c +++ b/src/mesa/main/blend.c @@ -1,21 +1,24 @@ -/* $Id: blend.c,v 1.21 2000/10/28 18:34:48 brianp Exp $ */ +/** + * \file blend.c + * Blending operations. + */ /* * Mesa 3-D graphics library - * Version: 3.5 - * - * Copyright (C) 1999-2000 Brian Paul All Rights Reserved. - * + * 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 @@ -26,923 +29,834 @@ -#ifdef PC_HEADER -#include "all.h" -#else #include "glheader.h" -#include "alphabuf.h" #include "blend.h" #include "context.h" #include "enums.h" #include "macros.h" -#include "pb.h" -#include "span.h" -#include "types.h" -#endif +#include "mtypes.h" -void -_mesa_BlendFunc( GLenum sfactor, GLenum dfactor ) + +/** + * 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) { - GET_CURRENT_CONTEXT(ctx); - ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glBlendFunc"); - - if (MESA_VERBOSE & (VERBOSE_API|VERBOSE_TEXTURE)) - fprintf(stderr, "glBlendFunc %s %s\n", - gl_lookup_enum_by_nr(sfactor), - gl_lookup_enum_by_nr(dfactor)); - - switch (sfactor) { - case GL_SRC_COLOR: - case GL_ONE_MINUS_SRC_COLOR: - if (!ctx->Extensions.HaveBlendSquare) { - gl_error( ctx, GL_INVALID_ENUM, "glBlendFunc(sfactor)" ); - 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: - ctx->Color.BlendSrcRGB = ctx->Color.BlendSrcA = sfactor; - break; - default: - gl_error( ctx, GL_INVALID_ENUM, "glBlendFunc(sfactor)" ); - return; + 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: + return GL_TRUE; + case GL_CONSTANT_COLOR: + case GL_ONE_MINUS_CONSTANT_COLOR: + case GL_CONSTANT_ALPHA: + case GL_ONE_MINUS_CONSTANT_ALPHA: + return _mesa_is_desktop_gl(ctx) || ctx->API == API_OPENGLES2; + case GL_SRC1_COLOR: + case GL_SRC1_ALPHA: + case GL_ONE_MINUS_SRC1_COLOR: + case GL_ONE_MINUS_SRC1_ALPHA: + return _mesa_is_desktop_gl(ctx) + && ctx->Extensions.ARB_blend_func_extended; + default: + return GL_FALSE; } +} - switch (dfactor) { - case GL_DST_COLOR: - case GL_ONE_MINUS_DST_COLOR: - if (!ctx->Extensions.HaveBlendSquare) { - gl_error( ctx, GL_INVALID_ENUM, "glBlendFunc(dfactor)" ); - 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: - ctx->Color.BlendDstRGB = ctx->Color.BlendDstA = dfactor; - break; - default: - gl_error( ctx, GL_INVALID_ENUM, "glBlendFunc(dfactor)" ); - return; + +/** + * 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: + return GL_TRUE; + case GL_CONSTANT_COLOR: + case GL_ONE_MINUS_CONSTANT_COLOR: + case GL_CONSTANT_ALPHA: + case GL_ONE_MINUS_CONSTANT_ALPHA: + return _mesa_is_desktop_gl(ctx) || ctx->API == API_OPENGLES2; + case GL_SRC_ALPHA_SATURATE: + return (_mesa_is_desktop_gl(ctx) + && ctx->Extensions.ARB_blend_func_extended) + || _mesa_is_gles3(ctx); + case GL_SRC1_COLOR: + case GL_SRC1_ALPHA: + case GL_ONE_MINUS_SRC1_COLOR: + case GL_ONE_MINUS_SRC1_ALPHA: + return _mesa_is_desktop_gl(ctx) + && ctx->Extensions.ARB_blend_func_extended; + default: + return GL_FALSE; } +} - if (ctx->Driver.BlendFunc) { - (*ctx->Driver.BlendFunc)( ctx, sfactor, dfactor ); + +/** + * 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; } - ctx->Color.BlendFunc = NULL; - ctx->NewState |= NEW_RASTER_OPS; + 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; } -/* GL_EXT_blend_func_separate */ -void +/** + * 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); +} + +static GLboolean +blend_factor_is_dual_src(GLenum factor) +{ + return (factor == GL_SRC1_COLOR || + factor == GL_SRC1_ALPHA || + factor == GL_ONE_MINUS_SRC1_COLOR || + factor == GL_ONE_MINUS_SRC1_ALPHA); +} + +static void +update_uses_dual_src(struct gl_context *ctx, int buf) +{ + ctx->Color.Blend[buf]._UsesDualSrc = + (blend_factor_is_dual_src(ctx->Color.Blend[buf].SrcRGB) || + blend_factor_is_dual_src(ctx->Color.Blend[buf].DstRGB) || + blend_factor_is_dual_src(ctx->Color.Blend[buf].SrcA) || + blend_factor_is_dual_src(ctx->Color.Blend[buf].DstA)); +} + +/** + * 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_AND_FLUSH(ctx, "glBlendFuncSeparate"); - - if (MESA_VERBOSE & (VERBOSE_API|VERBOSE_TEXTURE)) - fprintf(stderr, "glBlendFuncSeperate %s %s %s %s\n", - gl_lookup_enum_by_nr(sfactorRGB), - gl_lookup_enum_by_nr(dfactorRGB), - gl_lookup_enum_by_nr(sfactorA), - gl_lookup_enum_by_nr(dfactorA)); - - switch (sfactorRGB) { - case GL_SRC_COLOR: - case GL_ONE_MINUS_SRC_COLOR: - if (!ctx->Extensions.HaveBlendSquare) { - gl_error(ctx, GL_INVALID_ENUM, "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: - ctx->Color.BlendSrcRGB = sfactorRGB; - break; - default: - gl_error(ctx, GL_INVALID_ENUM, "glBlendFuncSeparate(sfactorRGB)"); - return; + 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; } - switch (dfactorRGB) { - case GL_DST_COLOR: - case GL_ONE_MINUS_DST_COLOR: - if (!ctx->Extensions.HaveBlendSquare) { - gl_error(ctx, GL_INVALID_ENUM, "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: - ctx->Color.BlendDstRGB = dfactorRGB; - break; - default: - gl_error(ctx, GL_INVALID_ENUM, "glBlendFuncSeparate(dfactorRGB)"); - return; - } + numBuffers = ctx->Extensions.ARB_draw_buffers_blend + ? ctx->Const.MaxDrawBuffers : 1; - switch (sfactorA) { - case GL_SRC_COLOR: - case GL_ONE_MINUS_SRC_COLOR: - if (!ctx->Extensions.HaveBlendSquare) { - gl_error(ctx, GL_INVALID_ENUM, "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: - ctx->Color.BlendSrcA = sfactorA; + changed = GL_FALSE; + for (buf = 0; buf < numBuffers; buf++) { + if (ctx->Color.Blend[buf].SrcRGB != sfactorRGB || + ctx->Color.Blend[buf].DstRGB != dfactorRGB || + ctx->Color.Blend[buf].SrcA != sfactorA || + ctx->Color.Blend[buf].DstA != dfactorA) { + changed = GL_TRUE; break; - default: - gl_error(ctx, GL_INVALID_ENUM, "glBlendFuncSeparate(sfactorA)"); - return; + } } + if (!changed) + return; - switch (dfactorA) { - case GL_DST_COLOR: - case GL_ONE_MINUS_DST_COLOR: - if (!ctx->Extensions.HaveBlendSquare) { - gl_error(ctx, GL_INVALID_ENUM, "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: - ctx->Color.BlendDstA = dfactorA; - break; - default: - gl_error( ctx, GL_INVALID_ENUM, "glBlendFuncSeparate(dfactorA)" ); - return; - } + FLUSH_VERTICES(ctx, _NEW_COLOR); - ctx->Color.BlendFunc = NULL; - ctx->NewState |= NEW_RASTER_OPS; + 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; + update_uses_dual_src(ctx, buf); + } + ctx->Color._BlendFuncPerBuffer = GL_FALSE; if (ctx->Driver.BlendFuncSeparate) { - (*ctx->Driver.BlendFuncSeparate)( ctx, sfactorRGB, dfactorRGB, - sfactorA, dfactorA ); + ctx->Driver.BlendFuncSeparate(ctx, sfactorRGB, dfactorRGB, + sfactorA, dfactorA); } } +/** + * 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); +} -/* This is really an extension function! */ -void -_mesa_BlendEquation( GLenum mode ) + +/** + * 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_AND_FLUSH(ctx, "glBlendEquation"); + ASSERT_OUTSIDE_BEGIN_END(ctx); - if (MESA_VERBOSE & (VERBOSE_API|VERBOSE_TEXTURE)) - fprintf(stderr, "glBlendEquation %s\n", - gl_lookup_enum_by_nr(mode)); - - switch (mode) { - case GL_MIN_EXT: - case GL_MAX_EXT: - case GL_FUNC_ADD_EXT: - if (ctx->Extensions.HaveBlendMinmax) { - ctx->Color.BlendEquation = mode; - } - else { - gl_error(ctx, GL_INVALID_ENUM, "glBlendEquation"); - return; - } - case GL_LOGIC_OP: - ctx->Color.BlendEquation = mode; - break; - case GL_FUNC_SUBTRACT_EXT: - case GL_FUNC_REVERSE_SUBTRACT_EXT: - if (ctx->Extensions.HaveBlendSubtract) { - ctx->Color.BlendEquation = mode; - } - else { - gl_error(ctx, GL_INVALID_ENUM, "glBlendEquation"); - return; - } - break; - default: - gl_error( ctx, GL_INVALID_ENUM, "glBlendEquation" ); - return; + if (!ctx->Extensions.ARB_draw_buffers_blend) { + _mesa_error(ctx, GL_INVALID_OPERATION, "glBlendFunc[Separate]i()"); + return; } - /* This is needed to support 1.1's RGB logic ops AND - * 1.0's blending logicops. - */ - if (mode==GL_LOGIC_OP && ctx->Color.BlendEnabled) { - ctx->Color.ColorLogicOpEnabled = GL_TRUE; + if (buf >= ctx->Const.MaxDrawBuffers) { + _mesa_error(ctx, GL_INVALID_VALUE, "glBlendFuncSeparatei(buffer=%u)", + buf); + return; } - else { - ctx->Color.ColorLogicOpEnabled = GL_FALSE; + + if (!validate_blend_factors(ctx, "glBlendFuncSeparatei", + sfactorRGB, dfactorRGB, + sfactorA, dfactorA)) { + return; } - ctx->Color.BlendFunc = NULL; - ctx->NewState |= NEW_RASTER_OPS; - - if (ctx->Driver.BlendEquation) - ctx->Driver.BlendEquation( ctx, mode ); -} + 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; + update_uses_dual_src(ctx, buf); + ctx->Color._BlendFuncPerBuffer = GL_TRUE; -void -_mesa_BlendColor( GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha ) -{ - GET_CURRENT_CONTEXT(ctx); - ctx->Color.BlendColor[0] = CLAMP( red, 0.0F, 1.0F ); - ctx->Color.BlendColor[1] = CLAMP( green, 0.0F, 1.0F ); - ctx->Color.BlendColor[2] = CLAMP( blue, 0.0F, 1.0F ); - ctx->Color.BlendColor[3] = CLAMP( alpha, 0.0F, 1.0F ); + if (ctx->Driver.BlendFuncSeparatei) { + ctx->Driver.BlendFuncSeparatei(ctx, buf, sfactorRGB, dfactorRGB, + sfactorA, dfactorA); + } } -#ifdef USE_MMX_ASM -#define _BLENDAPI _ASMAPI -#else -#define _BLENDAPI -#endif -/* - * Common transparency blending mode. +/** + * Check if given blend equation is legal. + * \return GL_TRUE if legal, GL_FALSE otherwise. */ -static void _BLENDAPI -blend_transparency( GLcontext *ctx, GLuint n, const GLubyte mask[], - GLchan rgba[][4], CONST GLchan dest[][4] ) +static GLboolean +legal_blend_equation(const struct gl_context *ctx, GLenum mode) { - GLuint i; - ASSERT(ctx->Color.BlendEquation==GL_FUNC_ADD_EXT); - ASSERT(ctx->Color.BlendSrcRGB==GL_SRC_ALPHA); - ASSERT(ctx->Color.BlendDstRGB==GL_ONE_MINUS_SRC_ALPHA); - (void) ctx; - - for (i=0;i> 8; - const GLint g = (rgba[i][GCOMP] * t + dest[i][GCOMP] * s + 1) >> 8; - const GLint b = (rgba[i][BCOMP] * t + dest[i][BCOMP] * s + 1) >> 8; - const GLint a = (rgba[i][ACOMP] * t + dest[i][ACOMP] * s + 1) >> 8; -#elif 0 - /* This is slower but satisfies Glean */ - const GLint s = CHAN_MAX - t; - const GLint r = (rgba[i][RCOMP] * t + dest[i][RCOMP] * s) / 255; - const GLint g = (rgba[i][GCOMP] * t + dest[i][GCOMP] * s) / 255; - const GLint b = (rgba[i][BCOMP] * t + dest[i][BCOMP] * s) / 255; - const GLint a = (rgba[i][ACOMP] * t + dest[i][ACOMP] * s) / 255; -#else - /* This satisfies Glean and should be reasonably fast */ - /* Contributed by Nathan Hand */ -#if CHAN_BITS == 8 -#define DIV255(X) (((X) << 8) + (X) + 256) >> 16 -#else -XXX todo -#endif - const GLint s = CHAN_MAX - t; - const GLint r = DIV255(rgba[i][RCOMP] * t + dest[i][RCOMP] * s); - const GLint g = DIV255(rgba[i][GCOMP] * t + dest[i][GCOMP] * s); - const GLint b = DIV255(rgba[i][BCOMP] * t + dest[i][BCOMP] * s); - const GLint a = DIV255(rgba[i][ACOMP] * t + dest[i][ACOMP] * s); -#undef DIV255 -#endif - ASSERT(r <= CHAN_MAX); - ASSERT(g <= CHAN_MAX); - ASSERT(b <= CHAN_MAX); - ASSERT(a <= CHAN_MAX); - rgba[i][RCOMP] = (GLchan) r; - rgba[i][GCOMP] = (GLchan) g; - rgba[i][BCOMP] = (GLchan) b; - rgba[i][ACOMP] = (GLchan) a; - } - } + switch (mode) { + case GL_FUNC_ADD: + case GL_FUNC_SUBTRACT: + case GL_FUNC_REVERSE_SUBTRACT: + return GL_TRUE; + case GL_MIN: + case GL_MAX: + return ctx->Extensions.EXT_blend_minmax; + default: + return GL_FALSE; } } - -/* - * Add src and dest. - */ -static void _BLENDAPI -blend_add( GLcontext *ctx, GLuint n, const GLubyte mask[], - GLchan rgba[][4], CONST GLchan dest[][4] ) +/* This is really an extension function! */ +void GLAPIENTRY +_mesa_BlendEquation( GLenum mode ) { - GLuint i; - ASSERT(ctx->Color.BlendEquation==GL_FUNC_ADD_EXT); - ASSERT(ctx->Color.BlendSrcRGB==GL_ONE); - ASSERT(ctx->Color.BlendDstRGB==GL_ONE); - (void) ctx; - - for (i=0;iExtensions.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 ); +} -/* - * Blend min function (for GL_EXT_blend_minmax) + +/** + * Set blend equation for one color buffer/target. */ -static void _BLENDAPI -blend_min( GLcontext *ctx, GLuint n, const GLubyte mask[], - GLchan rgba[][4], CONST GLchan dest[][4] ) +void GLAPIENTRY +_mesa_BlendEquationi(GLuint buf, GLenum mode) { - GLuint i; - ASSERT(ctx->Color.BlendEquation==GL_MIN_EXT); - (void) ctx; - - for (i=0;i= ctx->Const.MaxDrawBuffers) { + _mesa_error(ctx, GL_INVALID_VALUE, "glBlendFuncSeparatei(buffer=%u)", + buf); + return; } -} + if (!legal_blend_equation(ctx, mode)) { + _mesa_error(ctx, GL_INVALID_ENUM, "glBlendEquationi"); + return; + } + if (ctx->Color.Blend[buf].EquationRGB == mode && + ctx->Color.Blend[buf].EquationA == mode) + return; /* no change */ -/* - * Blend max function (for GL_EXT_blend_minmax) - */ -static void _BLENDAPI -blend_max( GLcontext *ctx, GLuint n, const GLubyte mask[], - GLchan rgba[][4], CONST GLchan dest[][4] ) + 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 i; - ASSERT(ctx->Color.BlendEquation==GL_MAX_EXT); - (void) ctx; - - for (i=0;iExtensions.EXT_blend_equation_separate ) { + _mesa_error(ctx, GL_INVALID_OPERATION, + "glBlendEquationSeparateEXT not supported by driver"); + return; + } + + if (!legal_blend_equation(ctx, modeRGB)) { + _mesa_error(ctx, GL_INVALID_ENUM, "glBlendEquationSeparateEXT(modeRGB)"); + return; + } + + if (!legal_blend_equation(ctx, modeA)) { + _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); +} -/* - * Modulate: result = src * dest +/** + * Set separate blend equations for one color buffer/target. */ -static void _BLENDAPI -blend_modulate( GLcontext *ctx, GLuint n, const GLubyte mask[], - GLchan rgba[][4], CONST GLchan dest[][4] ) +void GLAPIENTRY +_mesa_BlendEquationSeparatei(GLuint buf, GLenum modeRGB, GLenum modeA) { - GLuint i; - (void) ctx; - - for (i=0;i> 8; - GLint g = (rgba[i][GCOMP] * dest[i][GCOMP]) >> 8; - GLint b = (rgba[i][BCOMP] * dest[i][BCOMP]) >> 8; - GLint a = (rgba[i][ACOMP] * dest[i][ACOMP]) >> 8; - rgba[i][RCOMP] = (GLchan) r; - rgba[i][GCOMP] = (GLchan) g; - rgba[i][BCOMP] = (GLchan) b; - rgba[i][ACOMP] = (GLchan) a; - } + 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)) { + _mesa_error(ctx, GL_INVALID_ENUM, "glBlendEquationSeparatei(modeRGB)"); + return; + } + if (!legal_blend_equation(ctx, modeA)) { + _mesa_error(ctx, GL_INVALID_ENUM, "glBlendEquationSeparatei(modeA)"); + return; + } -/* - * General case blend pixels. - * Input: n - number of pixels - * mask - the usual write mask - * In/Out: rgba - the incoming and modified pixels - * Input: dest - the pixels from the dest color buffer + 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); +} + + +/** + * 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. */ -static void _BLENDAPI -blend_general( GLcontext *ctx, GLuint n, const GLubyte mask[], - GLchan rgba[][4], CONST GLchan dest[][4] ) +void GLAPIENTRY +_mesa_BlendColor( GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha ) { - GLfloat rscale = 1.0F / CHAN_MAXF; - GLfloat gscale = 1.0F / CHAN_MAXF; - GLfloat bscale = 1.0F / CHAN_MAXF; - GLfloat ascale = 1.0F / CHAN_MAXF; - GLuint i; + GLfloat tmp[4]; + GET_CURRENT_CONTEXT(ctx); + ASSERT_OUTSIDE_BEGIN_END(ctx); - for (i=0;iColor.BlendSrcRGB) { - case GL_ZERO: - sR = sG = sB = 0.0F; - break; - case GL_ONE: - sR = sG = sB = 1.0F; - break; - case GL_DST_COLOR: - sR = (GLfloat) Rd * rscale; - sG = (GLfloat) Gd * gscale; - sB = (GLfloat) Bd * bscale; - break; - case GL_ONE_MINUS_DST_COLOR: - sR = 1.0F - (GLfloat) Rd * rscale; - sG = 1.0F - (GLfloat) Gd * gscale; - sB = 1.0F - (GLfloat) Bd * bscale; - break; - case GL_SRC_ALPHA: - sR = sG = sB = (GLfloat) As * ascale; - break; - case GL_ONE_MINUS_SRC_ALPHA: - sR = sG = sB = (GLfloat) 1.0F - (GLfloat) As * ascale; - break; - case GL_DST_ALPHA: - sR = sG = sB = (GLfloat) Ad * ascale; - break; - case GL_ONE_MINUS_DST_ALPHA: - sR = sG = sB = 1.0F - (GLfloat) Ad * ascale; - break; - case GL_SRC_ALPHA_SATURATE: - if (As < CHAN_MAX - Ad) { - sR = sG = sB = (GLfloat) As * ascale; - } - else { - sR = sG = sB = 1.0F - (GLfloat) Ad * ascale; - } - 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: /* GL_NV_blend_square */ - sR = (GLfloat) Rs * rscale; - sG = (GLfloat) Gs * gscale; - sB = (GLfloat) Bs * bscale; - break; - case GL_ONE_MINUS_SRC_COLOR: /* GL_NV_blend_square */ - sR = 1.0F - (GLfloat) Rs * rscale; - sG = 1.0F - (GLfloat) Gs * gscale; - sB = 1.0F - (GLfloat) Bs * bscale; - break; - default: - /* this should never happen */ - gl_problem(ctx, "Bad blend source RGB factor in do_blend"); - return; - } + tmp[0] = red; + tmp[1] = green; + tmp[2] = blue; + tmp[3] = alpha; - /* Source Alpha factor */ - switch (ctx->Color.BlendSrcA) { - case GL_ZERO: - sA = 0.0F; - break; - case GL_ONE: - sA = 1.0F; - break; - case GL_DST_COLOR: - sA = (GLfloat) Ad * ascale; - break; - case GL_ONE_MINUS_DST_COLOR: - sA = 1.0F - (GLfloat) Ad * ascale; - break; - case GL_SRC_ALPHA: - sA = (GLfloat) As * ascale; - break; - case GL_ONE_MINUS_SRC_ALPHA: - sA = (GLfloat) 1.0F - (GLfloat) As * ascale; - break; - case GL_DST_ALPHA: - sA =(GLfloat) Ad * ascale; - break; - case GL_ONE_MINUS_DST_ALPHA: - sA = 1.0F - (GLfloat) Ad * ascale; - 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: /* GL_NV_blend_square */ - sA = (GLfloat) As * ascale; - break; - case GL_ONE_MINUS_SRC_COLOR: /* GL_NV_blend_square */ - sA = 1.0F - (GLfloat) As * ascale; - break; - default: - /* this should never happen */ - sA = 0.0F; - gl_problem(ctx, "Bad blend source A factor in do_blend"); - } + if (TEST_EQ_4V(tmp, ctx->Color.BlendColorUnclamped)) + return; - /* Dest RGB factor */ - switch (ctx->Color.BlendDstRGB) { - case GL_ZERO: - dR = dG = dB = 0.0F; - break; - case GL_ONE: - dR = dG = dB = 1.0F; - break; - case GL_SRC_COLOR: - dR = (GLfloat) Rs * rscale; - dG = (GLfloat) Gs * gscale; - dB = (GLfloat) Bs * bscale; - break; - case GL_ONE_MINUS_SRC_COLOR: - dR = 1.0F - (GLfloat) Rs * rscale; - dG = 1.0F - (GLfloat) Gs * gscale; - dB = 1.0F - (GLfloat) Bs * bscale; - break; - case GL_SRC_ALPHA: - dR = dG = dB = (GLfloat) As * ascale; - break; - case GL_ONE_MINUS_SRC_ALPHA: - dR = dG = dB = (GLfloat) 1.0F - (GLfloat) As * ascale; - break; - case GL_DST_ALPHA: - dR = dG = dB = (GLfloat) Ad * ascale; - break; - case GL_ONE_MINUS_DST_ALPHA: - dR = dG = dB = 1.0F - (GLfloat) Ad * ascale; - 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: /* GL_NV_blend_square */ - dR = (GLfloat) Rd * rscale; - dG = (GLfloat) Gd * gscale; - dB = (GLfloat) Bd * bscale; - break; - case GL_ONE_MINUS_DST_COLOR: /* GL_NV_blend_square */ - dR = 1.0F - (GLfloat) Rd * rscale; - dG = 1.0F - (GLfloat) Gd * gscale; - dB = 1.0F - (GLfloat) Bd * bscale; - break; - default: - /* this should never happen */ - dR = dG = dB = 0.0F; - gl_problem(ctx, "Bad blend dest RGB factor in do_blend"); - } + FLUSH_VERTICES(ctx, _NEW_COLOR); + COPY_4FV( ctx->Color.BlendColorUnclamped, tmp ); - /* Dest Alpha factor */ - switch (ctx->Color.BlendDstA) { - case GL_ZERO: - dA = 0.0F; - break; - case GL_ONE: - dA = 1.0F; - break; - case GL_SRC_COLOR: - dA = (GLfloat) As * ascale; - break; - case GL_ONE_MINUS_SRC_COLOR: - dA = 1.0F - (GLfloat) As * ascale; - break; - case GL_SRC_ALPHA: - dA = (GLfloat) As * ascale; - break; - case GL_ONE_MINUS_SRC_ALPHA: - dA = (GLfloat) 1.0F - (GLfloat) As * ascale; - break; - case GL_DST_ALPHA: - dA = (GLfloat) Ad * ascale; - break; - case GL_ONE_MINUS_DST_ALPHA: - dA = 1.0F - (GLfloat) Ad * ascale; - 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: /* GL_NV_blend_square */ - dA = (GLfloat) Ad * ascale; - break; - case GL_ONE_MINUS_DST_COLOR: /* GL_NV_blend_square */ - dA = 1.0F - (GLfloat) Ad * ascale; - break; - default: - /* this should never happen */ - dA = 0.0F; - gl_problem(ctx, "Bad blend dest A factor in do_blend"); - return; - } + 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); - /* Due to round-off problems we have to clamp against zero. */ - /* Optimization: we don't have to do this for all src & dst factors */ - if (dA < 0.0F) dA = 0.0F; - if (dR < 0.0F) dR = 0.0F; - if (dG < 0.0F) dG = 0.0F; - if (dB < 0.0F) dB = 0.0F; - if (sA < 0.0F) sA = 0.0F; - if (sR < 0.0F) sR = 0.0F; - if (sG < 0.0F) sG = 0.0F; - if (sB < 0.0F) sB = 0.0F; - - ASSERT( sR <= 1.0 ); - ASSERT( sG <= 1.0 ); - ASSERT( sB <= 1.0 ); - ASSERT( sA <= 1.0 ); - ASSERT( dR <= 1.0 ); - ASSERT( dG <= 1.0 ); - ASSERT( dB <= 1.0 ); - ASSERT( dA <= 1.0 ); - - /* compute blended color */ - if (ctx->Color.BlendEquation==GL_FUNC_ADD_EXT) { - r = Rs * sR + Rd * dR + 0.5F; - g = Gs * sG + Gd * dG + 0.5F; - b = Bs * sB + Bd * dB + 0.5F; - a = As * sA + Ad * dA + 0.5F; - } - else if (ctx->Color.BlendEquation==GL_FUNC_SUBTRACT_EXT) { - r = Rs * sR - Rd * dR + 0.5F; - g = Gs * sG - Gd * dG + 0.5F; - b = Bs * sB - Bd * dB + 0.5F; - a = As * sA - Ad * dA + 0.5F; - } - else if (ctx->Color.BlendEquation==GL_FUNC_REVERSE_SUBTRACT_EXT) { - r = Rd * dR - Rs * sR + 0.5F; - g = Gd * dG - Gs * sG + 0.5F; - b = Bd * dB - Bs * sB + 0.5F; - a = Ad * dA - As * sA + 0.5F; - } - else { - /* should never get here */ - r = g = b = a = 0.0F; /* silence uninitialized var warning */ - gl_problem(ctx, "unexpected BlendEquation in blend_general()"); - } + if (ctx->Driver.BlendColor) + (*ctx->Driver.BlendColor)(ctx, ctx->Color.BlendColor); +} - /* final clamping */ - rgba[i][RCOMP] = (GLchan) (GLint) CLAMP( r, 0.0F, CHAN_MAXF ); - rgba[i][GCOMP] = (GLchan) (GLint) CLAMP( g, 0.0F, CHAN_MAXF ); - rgba[i][BCOMP] = (GLchan) (GLint) CLAMP( b, 0.0F, CHAN_MAXF ); - rgba[i][ACOMP] = (GLchan) (GLint) CLAMP( a, 0.0F, CHAN_MAXF ); - } + +/** + * 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 ); } +void GLAPIENTRY +_mesa_IndexMask( GLuint mask ) +{ + GET_CURRENT_CONTEXT(ctx); + ASSERT_OUTSIDE_BEGIN_END(ctx); -#if defined(USE_MMX_ASM) -#include "X86/mmx.h" -#include "X86/common_x86_asm.h" -#endif + if (ctx->Color.IndexMask == mask) + return; + FLUSH_VERTICES(ctx, _NEW_COLOR); + ctx->Color.IndexMask = mask; +} -/* - * Analyze current blending parameters to pick fastest blending function. - * Result: the ctx->Color.BlendFunc pointer is updated. + +/** + * 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. */ -static void set_blend_function( GLcontext *ctx ) +void GLAPIENTRY +_mesa_ColorMask( GLboolean red, GLboolean green, + GLboolean blue, GLboolean alpha ) { - const GLenum eq = ctx->Color.BlendEquation; - const GLenum srcRGB = ctx->Color.BlendSrcRGB; - const GLenum dstRGB = ctx->Color.BlendDstRGB; - const GLenum srcA = ctx->Color.BlendSrcA; - const GLenum dstA = ctx->Color.BlendDstA; - -#if defined(USE_MMX_ASM) - /* Hmm. A table here would have 12^4 == way too many entries. - * Provide a hook for MMX instead. + 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: */ - if ( cpu_has_mmx ) { - gl_mmx_set_blend_function( ctx ); - } - else -#endif - if (srcRGB != srcA || dstRGB != dstA) { - ctx->Color.BlendFunc = blend_general; - } - else if (eq==GL_FUNC_ADD_EXT && srcRGB==GL_SRC_ALPHA - && dstRGB==GL_ONE_MINUS_SRC_ALPHA) { - ctx->Color.BlendFunc = blend_transparency; - } - else if (eq==GL_FUNC_ADD_EXT && srcRGB==GL_ONE && dstRGB==GL_ONE) { - ctx->Color.BlendFunc = blend_add; - } - else if (((eq==GL_FUNC_ADD_EXT || eq==GL_FUNC_REVERSE_SUBTRACT_EXT) - && (srcRGB==GL_ZERO && dstRGB==GL_SRC_COLOR)) - || - ((eq==GL_FUNC_ADD_EXT || eq==GL_FUNC_SUBTRACT_EXT) - && (srcRGB==GL_DST_COLOR && dstRGB==GL_ZERO))) { - ctx->Color.BlendFunc = blend_modulate; - } - else if (eq==GL_MIN_EXT) { - ctx->Color.BlendFunc = blend_min; - } - else if (eq==GL_MAX_EXT) { - ctx->Color.BlendFunc = blend_max; - } - else { - ctx->Color.BlendFunc = blend_general; + 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 ); +} -/* - * Apply the blending operator to a span of pixels. - * Input: n - number of pixels in span - * x, y - location of leftmost pixel in span in window coords. - * mask - boolean mask indicating which pixels to blend. - * In/Out: rgba - pixel values +/** + * For GL_EXT_draw_buffers2 and GL3 */ -void -_mesa_blend_span( GLcontext *ctx, GLuint n, GLint x, GLint y, - GLchan rgba[][4], const GLubyte mask[] ) +void GLAPIENTRY +_mesa_ColorMaskIndexed( GLuint buf, GLboolean red, GLboolean green, + GLboolean blue, GLboolean alpha ) { - GLchan dest[MAX_WIDTH][4]; + GLubyte tmp[4]; + GET_CURRENT_CONTEXT(ctx); + ASSERT_OUTSIDE_BEGIN_END(ctx); - /* Check if device driver can do the work */ - if (ctx->Color.BlendEquation==GL_LOGIC_OP && - !ctx->Color.ColorLogicOpEnabled) { + 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; } - /* Read span of current frame buffer pixels */ - gl_read_rgba_span( ctx, ctx->DrawBuffer, n, x, y, dest ); + /* 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 (!ctx->Color.BlendFunc) - set_blend_function(ctx); + if (TEST_EQ_4V(tmp, ctx->Color.ColorMask[buf])) + return; - (*ctx->Color.BlendFunc)( ctx, n, mask, rgba, (const GLchan (*)[4])dest ); -} + 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); +} -/* - * Apply the blending operator to an array of pixels. - * Input: n - number of pixels in span - * x, y - array of pixel locations - * mask - boolean mask indicating which pixels to blend. - * In/Out: rgba - pixel values - */ -void -_mesa_blend_pixels( GLcontext *ctx, - GLuint n, const GLint x[], const GLint y[], - GLchan rgba[][4], const GLchan mask[] ) +void GLAPIENTRY +_mesa_ClampColorARB(GLenum target, GLenum clamp) { - GLchan dest[PB_SIZE][4]; + 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; + } - /* Check if device driver can do the work */ - if (ctx->Color.BlendEquation==GL_LOGIC_OP && - !ctx->Color.ColorLogicOpEnabled) { + 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; } +} + + - /* Read pixels from current color buffer */ - (*ctx->Driver.ReadRGBAPixels)( ctx, n, x, y, dest, mask ); - if (ctx->RasterMask & ALPHABUF_BIT) { - _mesa_read_alpha_pixels( ctx, n, x, y, dest, mask ); + +/**********************************************************************/ +/** \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.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; } - if (!ctx->Color.BlendFunc) - set_blend_function(ctx); + ctx->Color.ClampFragmentColor = GL_FIXED_ONLY_ARB; + ctx->Color._ClampFragmentColor = GL_TRUE; + ctx->Color.ClampReadColor = GL_FIXED_ONLY_ARB; + ctx->Color._ClampReadColor = GL_TRUE; - (*ctx->Color.BlendFunc)( ctx, n, mask, rgba, (const GLchan (*)[4])dest ); + if (ctx->API == API_OPENGLES2) { + /* GLES 3 behaves as though GL_FRAMEBUFFER_SRGB is always enabled. */ + ctx->Color.sRGBEnabled = GL_TRUE; + } else { + ctx->Color.sRGBEnabled = GL_FALSE; + } } + +/*@}*/