| 1 | /* $Id: mmx.h,v 1.3 2000-05-23 20:34:53 jeroen Exp $ */
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| 2 |
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| 3 | /*
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| 4 | * Mesa 3-D graphics library
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| 5 | * Version: 3.1
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| 6 | *
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| 7 | * Copyright (C) 1999 Brian Paul All Rights Reserved.
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| 8 | *
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| 9 | * Permission is hereby granted, free of charge, to any person obtaining a
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| 10 | * copy of this software and associated documentation files (the "Software"),
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| 11 | * to deal in the Software without restriction, including without limitation
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| 12 | * the rights to use, copy, modify, merge, publish, distribute, sublicense,
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| 13 | * and/or sell copies of the Software, and to permit persons to whom the
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| 14 | * Software is furnished to do so, subject to the following conditions:
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| 15 | *
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| 16 | * The above copyright notice and this permission notice shall be included
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| 17 | * in all copies or substantial portions of the Software.
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| 18 | *
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| 19 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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| 20 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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| 21 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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| 22 | * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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| 23 | * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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| 24 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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| 25 | */
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| 26 |
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| 27 |
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| 28 |
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| 29 |
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| 30 |
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| 31 | #ifndef ASM_MMX_H
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| 32 | #define ASM_MMX_H
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| 33 |
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| 34 |
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| 35 | extern void _ASMAPI
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| 36 | gl_mmx_blend_transparency( GLcontext *ctx, GLuint n, const GLubyte mask[],
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| 37 | GLubyte rgba[][4], const GLubyte dest[][4] );
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| 38 |
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| 39 |
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| 40 | void gl_mmx_set_blend_function( GLcontext *ctx )
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| 41 | {
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| 42 | const GLenum eq = ctx->Color.BlendEquation;
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| 43 | const GLenum srcRGB = ctx->Color.BlendSrcRGB;
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| 44 | const GLenum dstRGB = ctx->Color.BlendDstRGB;
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| 45 | const GLenum srcA = ctx->Color.BlendSrcA;
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| 46 | const GLenum dstA = ctx->Color.BlendDstA;
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| 47 |
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| 48 |
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| 49 | if (srcRGB != srcA || dstRGB != dstA) {
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| 50 | ctx->Color.BlendFunc = blend_general;
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| 51 | }
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| 52 | else if (eq==GL_FUNC_ADD_EXT && srcRGB==GL_SRC_ALPHA
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| 53 | && dstRGB==GL_ONE_MINUS_SRC_ALPHA) {
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| 54 | ctx->Color.BlendFunc = gl_mmx_blend_transparency;
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| 55 | }
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| 56 | else if (eq==GL_FUNC_ADD_EXT && srcRGB==GL_ONE && dstRGB==GL_ONE) {
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| 57 | ctx->Color.BlendFunc = blend_add;
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| 58 | }
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| 59 | else if (((eq==GL_FUNC_ADD_EXT || eq==GL_FUNC_REVERSE_SUBTRACT_EXT)
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| 60 | && (srcRGB==GL_ZERO && dstRGB==GL_SRC_COLOR))
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| 61 | ||
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| 62 | ((eq==GL_FUNC_ADD_EXT || eq==GL_FUNC_SUBTRACT_EXT)
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| 63 | && (srcRGB==GL_DST_COLOR && dstRGB==GL_ZERO))) {
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| 64 | ctx->Color.BlendFunc = blend_modulate;
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| 65 | }
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| 66 | else if (eq==GL_MIN_EXT) {
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| 67 | ctx->Color.BlendFunc = blend_min;
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| 68 | }
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| 69 | else if (eq==GL_MAX_EXT) {
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| 70 | ctx->Color.BlendFunc = blend_max;
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| 71 | }
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| 72 | else {
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| 73 | ctx->Color.BlendFunc = blend_general;
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| 74 | }
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| 75 | }
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| 76 |
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| 77 |
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| 78 | #endif
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