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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 55 | pj | 1 | /* $Id: blend.c,v 1.1 2003-02-28 11:41:58 pj Exp $ */ |
| 2 | |||
| 3 | /* |
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| 4 | * Mesa 3-D graphics library |
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| 5 | * Version: 4.1 |
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| 6 | * |
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| 7 | * Copyright (C) 1999-2002 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 | |||
| 27 | |||
| 28 | #include "glheader.h" |
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| 29 | #include "blend.h" |
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| 30 | #include "colormac.h" |
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| 31 | #include "context.h" |
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| 32 | #include "enums.h" |
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| 33 | #include "macros.h" |
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| 34 | #include "mtypes.h" |
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| 35 | |||
| 36 | |||
| 37 | void |
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| 38 | _mesa_BlendFunc( GLenum sfactor, GLenum dfactor ) |
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| 39 | { |
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| 40 | |||
| 41 | GET_CURRENT_CONTEXT(ctx); |
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| 42 | ASSERT_OUTSIDE_BEGIN_END(ctx); |
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| 43 | |||
| 44 | if (MESA_VERBOSE & (VERBOSE_API|VERBOSE_TEXTURE)) |
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| 45 | _mesa_debug(ctx, "glBlendFunc %s %s\n", |
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| 46 | _mesa_lookup_enum_by_nr(sfactor), |
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| 47 | _mesa_lookup_enum_by_nr(dfactor)); |
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| 48 | |||
| 49 | switch (sfactor) { |
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| 50 | case GL_SRC_COLOR: |
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| 51 | case GL_ONE_MINUS_SRC_COLOR: |
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| 52 | if (!ctx->Extensions.NV_blend_square) { |
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| 53 | _mesa_error( ctx, GL_INVALID_ENUM, "glBlendFunc(sfactor)" ); |
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| 54 | return; |
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| 55 | } |
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| 56 | /* fall-through */ |
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| 57 | case GL_ZERO: |
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| 58 | case GL_ONE: |
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| 59 | case GL_DST_COLOR: |
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| 60 | case GL_ONE_MINUS_DST_COLOR: |
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| 61 | case GL_SRC_ALPHA: |
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| 62 | case GL_ONE_MINUS_SRC_ALPHA: |
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| 63 | case GL_DST_ALPHA: |
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| 64 | case GL_ONE_MINUS_DST_ALPHA: |
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| 65 | case GL_SRC_ALPHA_SATURATE: |
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| 66 | case GL_CONSTANT_COLOR: |
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| 67 | case GL_ONE_MINUS_CONSTANT_COLOR: |
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| 68 | case GL_CONSTANT_ALPHA: |
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| 69 | case GL_ONE_MINUS_CONSTANT_ALPHA: |
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| 70 | break; |
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| 71 | default: |
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| 72 | _mesa_error( ctx, GL_INVALID_ENUM, "glBlendFunc(sfactor)" ); |
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| 73 | return; |
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| 74 | } |
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| 75 | |||
| 76 | switch (dfactor) { |
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| 77 | case GL_DST_COLOR: |
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| 78 | case GL_ONE_MINUS_DST_COLOR: |
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| 79 | if (!ctx->Extensions.NV_blend_square) { |
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| 80 | _mesa_error( ctx, GL_INVALID_ENUM, "glBlendFunc(dfactor)" ); |
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| 81 | return; |
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| 82 | } |
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| 83 | /* fall-through */ |
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| 84 | case GL_ZERO: |
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| 85 | case GL_ONE: |
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| 86 | case GL_SRC_COLOR: |
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| 87 | case GL_ONE_MINUS_SRC_COLOR: |
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| 88 | case GL_SRC_ALPHA: |
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| 89 | case GL_ONE_MINUS_SRC_ALPHA: |
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| 90 | case GL_DST_ALPHA: |
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| 91 | case GL_ONE_MINUS_DST_ALPHA: |
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| 92 | case GL_CONSTANT_COLOR: |
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| 93 | case GL_ONE_MINUS_CONSTANT_COLOR: |
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| 94 | case GL_CONSTANT_ALPHA: |
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| 95 | case GL_ONE_MINUS_CONSTANT_ALPHA: |
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| 96 | break; |
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| 97 | default: |
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| 98 | _mesa_error( ctx, GL_INVALID_ENUM, "glBlendFunc(dfactor)" ); |
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| 99 | return; |
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| 100 | } |
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| 101 | |||
| 102 | if (ctx->Color.BlendDstRGB == dfactor && |
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| 103 | ctx->Color.BlendSrcRGB == sfactor && |
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| 104 | ctx->Color.BlendDstA == dfactor && |
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| 105 | ctx->Color.BlendSrcA == sfactor) |
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| 106 | return; |
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| 107 | |||
| 108 | FLUSH_VERTICES(ctx, _NEW_COLOR); |
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| 109 | ctx->Color.BlendDstRGB = ctx->Color.BlendDstA = dfactor; |
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| 110 | ctx->Color.BlendSrcRGB = ctx->Color.BlendSrcA = sfactor; |
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| 111 | |||
| 112 | if (ctx->Driver.BlendFunc) |
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| 113 | ctx->Driver.BlendFunc( ctx, sfactor, dfactor ); |
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| 114 | } |
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| 115 | |||
| 116 | |||
| 117 | /* GL_EXT_blend_func_separate */ |
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| 118 | void |
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| 119 | _mesa_BlendFuncSeparateEXT( GLenum sfactorRGB, GLenum dfactorRGB, |
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| 120 | GLenum sfactorA, GLenum dfactorA ) |
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| 121 | { |
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| 122 | GET_CURRENT_CONTEXT(ctx); |
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| 123 | ASSERT_OUTSIDE_BEGIN_END(ctx); |
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| 124 | |||
| 125 | if (MESA_VERBOSE & (VERBOSE_API|VERBOSE_TEXTURE)) |
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| 126 | _mesa_debug(ctx, "glBlendFuncSeparate %s %s %s %s\n", |
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| 127 | _mesa_lookup_enum_by_nr(sfactorRGB), |
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| 128 | _mesa_lookup_enum_by_nr(dfactorRGB), |
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| 129 | _mesa_lookup_enum_by_nr(sfactorA), |
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| 130 | _mesa_lookup_enum_by_nr(dfactorA)); |
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| 131 | |||
| 132 | switch (sfactorRGB) { |
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| 133 | case GL_SRC_COLOR: |
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| 134 | case GL_ONE_MINUS_SRC_COLOR: |
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| 135 | if (!ctx->Extensions.NV_blend_square) { |
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| 136 | _mesa_error(ctx, GL_INVALID_ENUM, "glBlendFuncSeparate(sfactorRGB)"); |
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| 137 | return; |
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| 138 | } |
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| 139 | /* fall-through */ |
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| 140 | case GL_ZERO: |
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| 141 | case GL_ONE: |
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| 142 | case GL_DST_COLOR: |
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| 143 | case GL_ONE_MINUS_DST_COLOR: |
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| 144 | case GL_SRC_ALPHA: |
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| 145 | case GL_ONE_MINUS_SRC_ALPHA: |
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| 146 | case GL_DST_ALPHA: |
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| 147 | case GL_ONE_MINUS_DST_ALPHA: |
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| 148 | case GL_SRC_ALPHA_SATURATE: |
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| 149 | case GL_CONSTANT_COLOR: |
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| 150 | case GL_ONE_MINUS_CONSTANT_COLOR: |
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| 151 | case GL_CONSTANT_ALPHA: |
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| 152 | case GL_ONE_MINUS_CONSTANT_ALPHA: |
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| 153 | break; |
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| 154 | default: |
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| 155 | _mesa_error(ctx, GL_INVALID_ENUM, "glBlendFuncSeparate(sfactorRGB)"); |
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| 156 | return; |
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| 157 | } |
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| 158 | |||
| 159 | switch (dfactorRGB) { |
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| 160 | case GL_DST_COLOR: |
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| 161 | case GL_ONE_MINUS_DST_COLOR: |
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| 162 | if (!ctx->Extensions.NV_blend_square) { |
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| 163 | _mesa_error(ctx, GL_INVALID_ENUM, "glBlendFuncSeparate(dfactorRGB)"); |
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| 164 | return; |
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| 165 | } |
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| 166 | /* fall-through */ |
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| 167 | case GL_ZERO: |
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| 168 | case GL_ONE: |
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| 169 | case GL_SRC_COLOR: |
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| 170 | case GL_ONE_MINUS_SRC_COLOR: |
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| 171 | case GL_SRC_ALPHA: |
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| 172 | case GL_ONE_MINUS_SRC_ALPHA: |
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| 173 | case GL_DST_ALPHA: |
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| 174 | case GL_ONE_MINUS_DST_ALPHA: |
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| 175 | case GL_CONSTANT_COLOR: |
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| 176 | case GL_ONE_MINUS_CONSTANT_COLOR: |
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| 177 | case GL_CONSTANT_ALPHA: |
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| 178 | case GL_ONE_MINUS_CONSTANT_ALPHA: |
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| 179 | break; |
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| 180 | default: |
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| 181 | _mesa_error(ctx, GL_INVALID_ENUM, "glBlendFuncSeparate(dfactorRGB)"); |
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| 182 | return; |
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| 183 | } |
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| 184 | |||
| 185 | switch (sfactorA) { |
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| 186 | case GL_SRC_COLOR: |
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| 187 | case GL_ONE_MINUS_SRC_COLOR: |
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| 188 | if (!ctx->Extensions.NV_blend_square) { |
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| 189 | _mesa_error(ctx, GL_INVALID_ENUM, "glBlendFuncSeparate(sfactorA)"); |
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| 190 | return; |
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| 191 | } |
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| 192 | /* fall-through */ |
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| 193 | case GL_ZERO: |
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| 194 | case GL_ONE: |
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| 195 | case GL_DST_COLOR: |
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| 196 | case GL_ONE_MINUS_DST_COLOR: |
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| 197 | case GL_SRC_ALPHA: |
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| 198 | case GL_ONE_MINUS_SRC_ALPHA: |
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| 199 | case GL_DST_ALPHA: |
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| 200 | case GL_ONE_MINUS_DST_ALPHA: |
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| 201 | case GL_SRC_ALPHA_SATURATE: |
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| 202 | case GL_CONSTANT_COLOR: |
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| 203 | case GL_ONE_MINUS_CONSTANT_COLOR: |
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| 204 | case GL_CONSTANT_ALPHA: |
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| 205 | case GL_ONE_MINUS_CONSTANT_ALPHA: |
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| 206 | break; |
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| 207 | default: |
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| 208 | _mesa_error(ctx, GL_INVALID_ENUM, "glBlendFuncSeparate(sfactorA)"); |
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| 209 | return; |
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| 210 | } |
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| 211 | |||
| 212 | switch (dfactorA) { |
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| 213 | case GL_DST_COLOR: |
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| 214 | case GL_ONE_MINUS_DST_COLOR: |
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| 215 | if (!ctx->Extensions.NV_blend_square) { |
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| 216 | _mesa_error(ctx, GL_INVALID_ENUM, "glBlendFuncSeparate(dfactorA)"); |
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| 217 | return; |
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| 218 | } |
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| 219 | /* fall-through */ |
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| 220 | case GL_ZERO: |
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| 221 | case GL_ONE: |
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| 222 | case GL_SRC_COLOR: |
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| 223 | case GL_ONE_MINUS_SRC_COLOR: |
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| 224 | case GL_SRC_ALPHA: |
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| 225 | case GL_ONE_MINUS_SRC_ALPHA: |
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| 226 | case GL_DST_ALPHA: |
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| 227 | case GL_ONE_MINUS_DST_ALPHA: |
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| 228 | case GL_CONSTANT_COLOR: |
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| 229 | case GL_ONE_MINUS_CONSTANT_COLOR: |
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| 230 | case GL_CONSTANT_ALPHA: |
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| 231 | case GL_ONE_MINUS_CONSTANT_ALPHA: |
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| 232 | break; |
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| 233 | default: |
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| 234 | _mesa_error( ctx, GL_INVALID_ENUM, "glBlendFuncSeparate(dfactorA)" ); |
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| 235 | return; |
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| 236 | } |
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| 237 | |||
| 238 | if (ctx->Color.BlendSrcRGB == sfactorRGB && |
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| 239 | ctx->Color.BlendDstRGB == dfactorRGB && |
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| 240 | ctx->Color.BlendSrcA == sfactorA && |
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| 241 | ctx->Color.BlendDstA == dfactorA) |
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| 242 | return; |
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| 243 | |||
| 244 | FLUSH_VERTICES(ctx, _NEW_COLOR); |
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| 245 | |||
| 246 | ctx->Color.BlendSrcRGB = sfactorRGB; |
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| 247 | ctx->Color.BlendDstRGB = dfactorRGB; |
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| 248 | ctx->Color.BlendSrcA = sfactorA; |
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| 249 | ctx->Color.BlendDstA = dfactorA; |
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| 250 | |||
| 251 | if (ctx->Driver.BlendFuncSeparate) { |
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| 252 | (*ctx->Driver.BlendFuncSeparate)( ctx, sfactorRGB, dfactorRGB, |
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| 253 | sfactorA, dfactorA ); |
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| 254 | } |
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| 255 | } |
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| 256 | |||
| 257 | |||
| 258 | |||
| 259 | /* This is really an extension function! */ |
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| 260 | void |
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| 261 | _mesa_BlendEquation( GLenum mode ) |
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| 262 | { |
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| 263 | GET_CURRENT_CONTEXT(ctx); |
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| 264 | ASSERT_OUTSIDE_BEGIN_END(ctx); |
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| 265 | |||
| 266 | if (MESA_VERBOSE & (VERBOSE_API|VERBOSE_TEXTURE)) |
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| 267 | _mesa_debug(ctx, "glBlendEquation %s\n", |
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| 268 | _mesa_lookup_enum_by_nr(mode)); |
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| 269 | |||
| 270 | switch (mode) { |
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| 271 | case GL_FUNC_ADD_EXT: |
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| 272 | break; |
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| 273 | case GL_MIN_EXT: |
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| 274 | case GL_MAX_EXT: |
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| 275 | if (!ctx->Extensions.EXT_blend_minmax && |
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| 276 | !ctx->Extensions.ARB_imaging) { |
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| 277 | _mesa_error(ctx, GL_INVALID_ENUM, "glBlendEquation"); |
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| 278 | return; |
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| 279 | } |
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| 280 | break; |
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| 281 | case GL_LOGIC_OP: |
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| 282 | if (!ctx->Extensions.EXT_blend_logic_op) { |
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| 283 | _mesa_error(ctx, GL_INVALID_ENUM, "glBlendEquation"); |
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| 284 | return; |
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| 285 | } |
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| 286 | break; |
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| 287 | case GL_FUNC_SUBTRACT_EXT: |
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| 288 | case GL_FUNC_REVERSE_SUBTRACT_EXT: |
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| 289 | if (!ctx->Extensions.EXT_blend_subtract && |
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| 290 | !ctx->Extensions.ARB_imaging) { |
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| 291 | _mesa_error(ctx, GL_INVALID_ENUM, "glBlendEquation"); |
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| 292 | return; |
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| 293 | } |
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| 294 | break; |
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| 295 | default: |
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| 296 | _mesa_error( ctx, GL_INVALID_ENUM, "glBlendEquation" ); |
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| 297 | return; |
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| 298 | } |
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| 299 | |||
| 300 | if (ctx->Color.BlendEquation == mode) |
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| 301 | return; |
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| 302 | |||
| 303 | FLUSH_VERTICES(ctx, _NEW_COLOR); |
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| 304 | ctx->Color.BlendEquation = mode; |
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| 305 | |||
| 306 | /* This is needed to support 1.1's RGB logic ops AND |
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| 307 | * 1.0's blending logicops. |
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| 308 | */ |
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| 309 | ctx->Color.ColorLogicOpEnabled = (mode==GL_LOGIC_OP && |
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| 310 | ctx->Color.BlendEnabled); |
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| 311 | |||
| 312 | if (ctx->Driver.BlendEquation) |
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| 313 | (*ctx->Driver.BlendEquation)( ctx, mode ); |
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| 314 | } |
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| 315 | |||
| 316 | |||
| 317 | |||
| 318 | void |
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| 319 | _mesa_BlendColor( GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha ) |
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| 320 | { |
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| 321 | GLfloat tmp[4]; |
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| 322 | GET_CURRENT_CONTEXT(ctx); |
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| 323 | ASSERT_OUTSIDE_BEGIN_END(ctx); |
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| 324 | |||
| 325 | tmp[0] = CLAMP( red, 0.0F, 1.0F ); |
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| 326 | tmp[1] = CLAMP( green, 0.0F, 1.0F ); |
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| 327 | tmp[2] = CLAMP( blue, 0.0F, 1.0F ); |
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| 328 | tmp[3] = CLAMP( alpha, 0.0F, 1.0F ); |
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| 329 | |||
| 330 | if (TEST_EQ_4V(tmp, ctx->Color.BlendColor)) |
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| 331 | return; |
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| 332 | |||
| 333 | FLUSH_VERTICES(ctx, _NEW_COLOR); |
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| 334 | COPY_4FV( ctx->Color.BlendColor, tmp ); |
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| 335 | |||
| 336 | if (ctx->Driver.BlendColor) |
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| 337 | (*ctx->Driver.BlendColor)(ctx, tmp); |
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| 338 | } |
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| 339 | |||
| 340 | |||
| 341 | void |
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| 342 | _mesa_AlphaFunc( GLenum func, GLclampf ref ) |
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| 343 | { |
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| 344 | GET_CURRENT_CONTEXT(ctx); |
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| 345 | ASSERT_OUTSIDE_BEGIN_END(ctx); |
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| 346 | |||
| 347 | switch (func) { |
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| 348 | case GL_NEVER: |
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| 349 | case GL_LESS: |
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| 350 | case GL_EQUAL: |
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| 351 | case GL_LEQUAL: |
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| 352 | case GL_GREATER: |
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| 353 | case GL_NOTEQUAL: |
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| 354 | case GL_GEQUAL: |
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| 355 | case GL_ALWAYS: |
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| 356 | ref = CLAMP(ref, 0.0F, 1.0F); |
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| 357 | |||
| 358 | if (ctx->Color.AlphaFunc == func && ctx->Color.AlphaRef == ref) |
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| 359 | return; /* no change */ |
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| 360 | |||
| 361 | FLUSH_VERTICES(ctx, _NEW_COLOR); |
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| 362 | ctx->Color.AlphaFunc = func; |
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| 363 | ctx->Color.AlphaRef = ref; |
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| 364 | |||
| 365 | if (ctx->Driver.AlphaFunc) |
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| 366 | ctx->Driver.AlphaFunc(ctx, func, ref); |
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| 367 | return; |
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| 368 | |||
| 369 | default: |
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| 370 | _mesa_error( ctx, GL_INVALID_ENUM, "glAlphaFunc(func)" ); |
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| 371 | return; |
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| 372 | } |
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| 373 | } |
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| 374 | |||
| 375 | |||
| 376 | void |
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| 377 | _mesa_LogicOp( GLenum opcode ) |
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| 378 | { |
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| 379 | GET_CURRENT_CONTEXT(ctx); |
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| 380 | ASSERT_OUTSIDE_BEGIN_END(ctx); |
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| 381 | |||
| 382 | switch (opcode) { |
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| 383 | case GL_CLEAR: |
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| 384 | case GL_SET: |
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| 385 | case GL_COPY: |
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| 386 | case GL_COPY_INVERTED: |
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| 387 | case GL_NOOP: |
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| 388 | case GL_INVERT: |
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| 389 | case GL_AND: |
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| 390 | case GL_NAND: |
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| 391 | case GL_OR: |
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| 392 | case GL_NOR: |
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| 393 | case GL_XOR: |
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| 394 | case GL_EQUIV: |
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| 395 | case GL_AND_REVERSE: |
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| 396 | case GL_AND_INVERTED: |
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| 397 | case GL_OR_REVERSE: |
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| 398 | case GL_OR_INVERTED: |
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| 399 | break; |
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| 400 | default: |
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| 401 | _mesa_error( ctx, GL_INVALID_ENUM, "glLogicOp" ); |
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| 402 | return; |
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| 403 | } |
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| 404 | |||
| 405 | if (ctx->Color.LogicOp == opcode) |
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| 406 | return; |
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| 407 | |||
| 408 | FLUSH_VERTICES(ctx, _NEW_COLOR); |
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| 409 | ctx->Color.LogicOp = opcode; |
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| 410 | |||
| 411 | if (ctx->Driver.LogicOpcode) |
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| 412 | ctx->Driver.LogicOpcode( ctx, opcode ); |
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| 413 | } |
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| 414 | |||
| 415 | |||
| 416 | void |
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| 417 | _mesa_IndexMask( GLuint mask ) |
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| 418 | { |
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| 419 | GET_CURRENT_CONTEXT(ctx); |
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| 420 | ASSERT_OUTSIDE_BEGIN_END(ctx); |
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| 421 | |||
| 422 | if (ctx->Color.IndexMask == mask) |
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| 423 | return; |
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| 424 | |||
| 425 | FLUSH_VERTICES(ctx, _NEW_COLOR); |
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| 426 | ctx->Color.IndexMask = mask; |
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| 427 | |||
| 428 | if (ctx->Driver.IndexMask) |
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| 429 | ctx->Driver.IndexMask( ctx, mask ); |
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| 430 | } |
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| 431 | |||
| 432 | |||
| 433 | void |
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| 434 | _mesa_ColorMask( GLboolean red, GLboolean green, |
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| 435 | GLboolean blue, GLboolean alpha ) |
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| 436 | { |
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| 437 | GET_CURRENT_CONTEXT(ctx); |
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| 438 | GLubyte tmp[4]; |
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| 439 | ASSERT_OUTSIDE_BEGIN_END(ctx); |
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| 440 | |||
| 441 | if (MESA_VERBOSE & VERBOSE_API) |
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| 442 | _mesa_debug(ctx, "glColorMask %d %d %d %d\n", red, green, blue, alpha); |
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| 443 | |||
| 444 | /* Shouldn't have any information about channel depth in core mesa |
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| 445 | * -- should probably store these as the native booleans: |
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| 446 | */ |
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| 447 | tmp[RCOMP] = red ? 0xff : 0x0; |
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| 448 | tmp[GCOMP] = green ? 0xff : 0x0; |
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| 449 | tmp[BCOMP] = blue ? 0xff : 0x0; |
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| 450 | tmp[ACOMP] = alpha ? 0xff : 0x0; |
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| 451 | |||
| 452 | if (TEST_EQ_4UBV(tmp, ctx->Color.ColorMask)) |
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| 453 | return; |
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| 454 | |||
| 455 | FLUSH_VERTICES(ctx, _NEW_COLOR); |
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| 456 | COPY_4UBV(ctx->Color.ColorMask, tmp); |
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| 457 | |||
| 458 | if (ctx->Driver.ColorMask) |
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| 459 | ctx->Driver.ColorMask( ctx, red, green, blue, alpha ); |
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| 460 | } |