X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=src%2Fmesa%2Fmain%2Fblend.c;h=81bd4c2f32038a0eb0d30bb24618d5aa9c25d8b2;hb=77b794201a96300af4473307a7663500d62296e8;hp=431fa603d27d05a9d9a8b224233f31e71dba033a;hpb=8e053916c8052b47c191f68991c126f47c72c3f3;p=mesa.git diff --git a/src/mesa/main/blend.c b/src/mesa/main/blend.c index 431fa603d27..81bd4c2f320 100644 --- a/src/mesa/main/blend.c +++ b/src/mesa/main/blend.c @@ -1,21 +1,24 @@ -/* $Id: blend.c,v 1.17 2000/08/30 18:21:06 brianp Exp $ */ +/** + * \file blend.c + * Blending operations. + */ /* * Mesa 3-D graphics library - * Version: 3.3 - * - * Copyright (C) 1999 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 @@ -26,116 +29,69 @@ -#ifdef PC_HEADER -#include "all.h" -#else #include "glheader.h" -#include "alphabuf.h" #include "blend.h" +#include "colormac.h" #include "context.h" #include "enums.h" #include "macros.h" -#include "pb.h" -#include "span.h" -#include "types.h" -#endif - - -void +#include "mtypes.h" + + +/** + * Specify the blending operation. + * + * \param sfactor source factor operator. + * \param dfactor destination factor operator. + * + * \sa glBlendFunc, glBlendFuncSeparateEXT + * + * Swizzles the inputs and calls \c glBlendFuncSeparateEXT. This is done + * using the \c CurrentDispatch table in the context, so this same function + * can be used while compiling display lists. Therefore, there is no need + * for the display list code to save and restore this function. + */ +void GLAPIENTRY _mesa_BlendFunc( GLenum sfactor, GLenum dfactor ) { 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 (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; - } - - if (ctx->Driver.BlendFunc) { - (*ctx->Driver.BlendFunc)( ctx, sfactor, dfactor ); - } - - ctx->Color.BlendFunc = NULL; - ctx->NewState |= NEW_RASTER_OPS; + (*ctx->CurrentDispatch->BlendFuncSeparateEXT)( sfactor, dfactor, + sfactor, dfactor ); } -/* GL_EXT_blend_func_separate */ -void +/** + * 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_AND_FLUSH(ctx, "glBlendFuncSeparate"); + ASSERT_OUTSIDE_BEGIN_END(ctx); 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)); + _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.HaveBlendSquare) { - gl_error(ctx, GL_INVALID_ENUM, "glBlendFuncSeparate(sfactorRGB)"); + if (!ctx->Extensions.NV_blend_square) { + _mesa_error(ctx, GL_INVALID_ENUM, "glBlendFunc or glBlendFuncSeparate (sfactorRGB)"); return; } /* fall-through */ @@ -152,18 +108,17 @@ _mesa_BlendFuncSeparateEXT( GLenum sfactorRGB, GLenum dfactorRGB, 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)"); + _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.HaveBlendSquare) { - gl_error(ctx, GL_INVALID_ENUM, "glBlendFuncSeparate(dfactorRGB)"); + if (!ctx->Extensions.NV_blend_square) { + _mesa_error(ctx, GL_INVALID_ENUM, "glBlendFunc or glBlendFuncSeparate (dfactorRGB)"); return; } /* fall-through */ @@ -179,18 +134,17 @@ _mesa_BlendFuncSeparateEXT( GLenum sfactorRGB, GLenum dfactorRGB, 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)"); + _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.HaveBlendSquare) { - gl_error(ctx, GL_INVALID_ENUM, "glBlendFuncSeparate(sfactorA)"); + if (!ctx->Extensions.NV_blend_square) { + _mesa_error(ctx, GL_INVALID_ENUM, "glBlendFunc or glBlendFuncSeparate (sfactorA)"); return; } /* fall-through */ @@ -207,18 +161,17 @@ _mesa_BlendFuncSeparateEXT( GLenum sfactorRGB, GLenum dfactorRGB, case GL_ONE_MINUS_CONSTANT_COLOR: case GL_CONSTANT_ALPHA: case GL_ONE_MINUS_CONSTANT_ALPHA: - ctx->Color.BlendSrcA = sfactorA; break; default: - gl_error(ctx, GL_INVALID_ENUM, "glBlendFuncSeparate(sfactorA)"); + _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.HaveBlendSquare) { - gl_error(ctx, GL_INVALID_ENUM, "glBlendFuncSeparate(dfactorA)"); + if (!ctx->Extensions.NV_blend_square) { + _mesa_error(ctx, GL_INVALID_ENUM, "glBlendFunc or glBlendFuncSeparate (dfactorA)"); return; } /* fall-through */ @@ -234,15 +187,24 @@ _mesa_BlendFuncSeparateEXT( GLenum sfactorRGB, GLenum dfactorRGB, 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)" ); + _mesa_error( ctx, GL_INVALID_ENUM, "glBlendFunc or glBlendFuncSeparate (dfactorA)" ); return; } - ctx->Color.BlendFunc = NULL; - ctx->NewState |= NEW_RASTER_OPS; + 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, @@ -251,674 +213,388 @@ _mesa_BlendFuncSeparateEXT( GLenum sfactorRGB, GLenum dfactorRGB, } +#if _HAVE_FULL_GL -/* This is really an extension function! */ -void -_mesa_BlendEquation( GLenum mode ) +static GLboolean +_mesa_validate_blend_equation( GLcontext *ctx, + GLenum mode, GLboolean is_separate ) { - GET_CURRENT_CONTEXT(ctx); - ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glBlendEquation"); - - 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_FUNC_ADD: + break; + case GL_MIN: + case GL_MAX: + if (!ctx->Extensions.EXT_blend_minmax && + !ctx->Extensions.ARB_imaging) { + return GL_FALSE; } - 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; + /* 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; } - else { - gl_error(ctx, GL_INVALID_ENUM, "glBlendEquation"); - return; + 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: - gl_error( ctx, GL_INVALID_ENUM, "glBlendEquation" ); - return; + return GL_FALSE; } - /* 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; - } - else { - ctx->Color.ColorLogicOpEnabled = GL_FALSE; - } - - ctx->Color.BlendFunc = NULL; - ctx->NewState |= NEW_RASTER_OPS; - - if (ctx->Driver.BlendEquation) - ctx->Driver.BlendEquation( ctx, mode ); + return GL_TRUE; } - -void -_mesa_BlendColor( GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha ) +/* This is really an extension function! */ +void GLAPIENTRY +_mesa_BlendEquation( GLenum mode ) { 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 ); -} + ASSERT_OUTSIDE_BEGIN_END(ctx); -#ifdef USE_MMX_ASM -#define _BLENDAPI _ASMAPI -#else -#define _BLENDAPI -#endif + if (MESA_VERBOSE & (VERBOSE_API|VERBOSE_TEXTURE)) + _mesa_debug(ctx, "glBlendEquation %s\n", + _mesa_lookup_enum_by_nr(mode)); -/* - * Common transparency blending mode. - */ -static void _BLENDAPI -blend_transparency( GLcontext *ctx, GLuint n, const GLubyte mask[], - GLubyte rgba[][4], CONST GLubyte dest[][4] ) -{ - 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) >> 8; - const GLint b = (rgba[i][BCOMP] * t + dest[i][BCOMP] * s) >> 8; - const GLint a = (rgba[i][ACOMP] * t + dest[i][ACOMP] * s) >> 8; - ASSERT(r <= CHAN_MAX); - ASSERT(g <= CHAN_MAX); - ASSERT(b <= CHAN_MAX); - ASSERT(a <= CHAN_MAX); - rgba[i][RCOMP] = (GLubyte) r; - rgba[i][GCOMP] = (GLubyte) g; - rgba[i][BCOMP] = (GLubyte) b; - rgba[i][ACOMP] = (GLubyte) a; - } - } + 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; -/* - * Add src and dest. - */ -static void _BLENDAPI -blend_add( GLcontext *ctx, GLuint n, const GLubyte mask[], - GLubyte rgba[][4], CONST GLubyte dest[][4] ) -{ - 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;iDriver.BlendEquationSeparate) + (*ctx->Driver.BlendEquationSeparate)( ctx, mode, mode ); } - -/* - * Blend min function (for GL_EXT_blend_minmax) - */ -static void _BLENDAPI -blend_min( GLcontext *ctx, GLuint n, const GLubyte mask[], - GLubyte rgba[][4], CONST GLubyte dest[][4] ) +void GLAPIENTRY +_mesa_BlendEquationSeparateEXT( GLenum modeRGB, GLenum modeA ) { - GLuint i; - ASSERT(ctx->Color.BlendEquation==GL_MIN_EXT); - (void) ctx; - - for (i=0;iExtensions.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; + } -/* - * Blend max function (for GL_EXT_blend_minmax) + 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. */ -static void _BLENDAPI -blend_max( GLcontext *ctx, GLuint n, const GLubyte mask[], - GLubyte rgba[][4], CONST GLubyte dest[][4] ) +void GLAPIENTRY +_mesa_BlendColor( GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha ) { - GLuint i; - ASSERT(ctx->Color.BlendEquation==GL_MAX_EXT); - (void) ctx; - - for (i=0;iColor.BlendColor)) + return; -/* - * Modulate: result = src * dest + 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. */ -static void _BLENDAPI -blend_modulate( GLcontext *ctx, GLuint n, const GLubyte mask[], - GLubyte rgba[][4], CONST GLubyte dest[][4] ) +void GLAPIENTRY +_mesa_AlphaFunc( GLenum func, GLclampf ref ) { - 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] = (GLubyte) r; - rgba[i][GCOMP] = (GLubyte) g; - rgba[i][BCOMP] = (GLubyte) b; - rgba[i][ACOMP] = (GLubyte) a; - } + 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; } } - -/* - * 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 +/** + * 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. */ -static void _BLENDAPI -blend_general( GLcontext *ctx, GLuint n, const GLubyte mask[], - GLubyte rgba[][4], CONST GLubyte dest[][4] ) +void GLAPIENTRY +_mesa_LogicOp( GLenum opcode ) { - 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; - - 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; - } - - /* 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"); - } - - /* 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"); - } + 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; + } - /* 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; - } + if (ctx->Color.LogicOp == opcode) + return; - /* 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; - g = Gs * sG + Gd * dG; - b = Bs * sB + Bd * dB; - a = As * sA + Ad * dA; - } - else if (ctx->Color.BlendEquation==GL_FUNC_SUBTRACT_EXT) { - r = Rs * sR - Rd * dR; - g = Gs * sG - Gd * dG; - b = Bs * sB - Bd * dB; - a = As * sA - Ad * dA; - } - else if (ctx->Color.BlendEquation==GL_FUNC_REVERSE_SUBTRACT_EXT) { - r = Rd * dR - Rs * sR; - g = Gd * dG - Gs * sG; - b = Bd * dB - Bs * sB; - a = Ad * dA - As * sA; - } - else { - /* should never get here */ - r = g = b = a = 0.0F; /* silence uninitialized var warning */ - gl_problem(ctx, "unexpected BlendEquation in blend_general()"); - } + FLUSH_VERTICES(ctx, _NEW_COLOR); + ctx->Color.LogicOp = opcode; - /* final clamping */ - rgba[i][RCOMP] = (GLubyte) (GLint) CLAMP( r, 0.0F, CHAN_MAXF ); - rgba[i][GCOMP] = (GLubyte) (GLint) CLAMP( g, 0.0F, CHAN_MAXF ); - rgba[i][BCOMP] = (GLubyte) (GLint) CLAMP( b, 0.0F, CHAN_MAXF ); - rgba[i][ACOMP] = (GLubyte) (GLint) CLAMP( a, 0.0F, CHAN_MAXF ); - } - } + 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 defined(USE_MMX_ASM) -#include "X86/mmx.h" -#include "X86/common_x86asm.h" + if (ctx->Driver.IndexMask) + ctx->Driver.IndexMask( ctx, mask ); +} #endif -/* - * 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]; + 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 (gl_x86_cpu_features & GL_CPU_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; + if (TEST_EQ_4UBV(tmp, ctx->Color.ColorMask)) + return; + FLUSH_VERTICES(ctx, _NEW_COLOR); + COPY_4UBV(ctx->Color.ColorMask, tmp); -/* - * 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 - */ -void -_mesa_blend_span( GLcontext *ctx, GLuint n, GLint x, GLint y, - GLubyte rgba[][4], const GLubyte mask[] ) + if (ctx->Driver.ColorMask) + ctx->Driver.ColorMask( ctx, red, green, blue, alpha ); +} + + +extern void GLAPIENTRY +_mesa_ClampColorARB(GLenum target, GLenum clamp) { - GLubyte dest[MAX_WIDTH][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.SWLogicOpEnabled) { + if (clamp != GL_TRUE && clamp != GL_FALSE && clamp != GL_FIXED_ONLY_ARB) { + _mesa_error(ctx, GL_INVALID_ENUM, "glClampColorARB(clamp)"); return; } - /* Read span of current frame buffer pixels */ - gl_read_rgba_span( ctx, ctx->DrawBuffer, n, x, y, dest ); - - if (!ctx->Color.BlendFunc) - set_blend_function(ctx); - - (*ctx->Color.BlendFunc)( ctx, n, mask, rgba, (const GLubyte (*)[4])dest ); + 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 */ +/*@{*/ -/* - * 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 +/** + * 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_blend_pixels( GLcontext *ctx, - GLuint n, const GLint x[], const GLint y[], - GLubyte rgba[][4], const GLubyte mask[] ) +void _mesa_init_color( GLcontext * ctx ) { - GLubyte dest[PB_SIZE][4]; - - /* Check if device driver can do the work */ - if (ctx->Color.BlendEquation==GL_LOGIC_OP && !ctx->Color.SWLogicOpEnabled) { - return; + /* 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; } - - /* 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 ); + else { + ctx->Color.DrawBuffer[0] = GL_FRONT; } - if (!ctx->Color.BlendFunc) - set_blend_function(ctx); - - (*ctx->Color.BlendFunc)( ctx, n, mask, rgba, (const GLubyte (*)[4])dest ); + ctx->Color.ClampFragmentColor = GL_FIXED_ONLY_ARB; + ctx->Color.ClampReadColor = GL_FIXED_ONLY_ARB; } + +/*@}*/