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| 1901 | serge | 1 | /************************************************************************** |
| 2 | * |
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| 3 | * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. |
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| 4 | * All Rights Reserved. |
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| 5 | * |
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| 6 | * Permission is hereby granted, free of charge, to any person obtaining a |
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| 7 | * copy of this software and associated documentation files (the |
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| 8 | * "Software"), to deal in the Software without restriction, including |
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| 9 | * without limitation the rights to use, copy, modify, merge, publish, |
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| 10 | * distribute, sub license, and/or sell copies of the Software, and to |
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| 11 | * permit persons to whom the Software is furnished to do so, subject to |
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| 12 | * the following conditions: |
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| 13 | * |
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| 14 | * The above copyright notice and this permission notice (including the |
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| 15 | * next paragraph) shall be included in all copies or substantial portions |
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| 16 | * of the Software. |
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| 17 | * |
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| 18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
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| 19 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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| 20 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. |
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| 21 | * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR |
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| 22 | * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
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| 23 | * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
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| 24 | * 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 | |||
| 28 | /* |
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| 29 | * Authors: |
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| 30 | * Keith Whitwell |
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| 31 | * Brian Paul |
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| 32 | */ |
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| 33 | |||
| 34 | |||
| 35 | #include "st_context.h" |
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| 36 | #include "st_atom.h" |
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| 37 | |||
| 38 | #include "pipe/p_context.h" |
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| 39 | #include "pipe/p_defines.h" |
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| 40 | #include "cso_cache/cso_context.h" |
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| 41 | |||
| 42 | #include "main/macros.h" |
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| 43 | |||
| 44 | /** |
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| 45 | * Convert GLenum blend tokens to pipe tokens. |
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| 46 | * Both blend factors and blend funcs are accepted. |
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| 47 | */ |
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| 48 | static GLuint |
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| 49 | translate_blend(GLenum blend) |
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| 50 | { |
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| 51 | switch (blend) { |
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| 52 | /* blend functions */ |
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| 53 | case GL_FUNC_ADD: |
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| 54 | return PIPE_BLEND_ADD; |
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| 55 | case GL_FUNC_SUBTRACT: |
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| 56 | return PIPE_BLEND_SUBTRACT; |
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| 57 | case GL_FUNC_REVERSE_SUBTRACT: |
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| 58 | return PIPE_BLEND_REVERSE_SUBTRACT; |
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| 59 | case GL_MIN: |
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| 60 | return PIPE_BLEND_MIN; |
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| 61 | case GL_MAX: |
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| 62 | return PIPE_BLEND_MAX; |
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| 63 | |||
| 64 | /* blend factors */ |
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| 65 | case GL_ONE: |
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| 66 | return PIPE_BLENDFACTOR_ONE; |
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| 67 | case GL_SRC_COLOR: |
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| 68 | return PIPE_BLENDFACTOR_SRC_COLOR; |
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| 69 | case GL_SRC_ALPHA: |
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| 70 | return PIPE_BLENDFACTOR_SRC_ALPHA; |
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| 71 | case GL_DST_ALPHA: |
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| 72 | return PIPE_BLENDFACTOR_DST_ALPHA; |
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| 73 | case GL_DST_COLOR: |
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| 74 | return PIPE_BLENDFACTOR_DST_COLOR; |
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| 75 | case GL_SRC_ALPHA_SATURATE: |
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| 76 | return PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE; |
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| 77 | case GL_CONSTANT_COLOR: |
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| 78 | return PIPE_BLENDFACTOR_CONST_COLOR; |
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| 79 | case GL_CONSTANT_ALPHA: |
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| 80 | return PIPE_BLENDFACTOR_CONST_ALPHA; |
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| 81 | /* |
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| 82 | return PIPE_BLENDFACTOR_SRC1_COLOR; |
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| 83 | return PIPE_BLENDFACTOR_SRC1_ALPHA; |
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| 84 | */ |
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| 85 | case GL_ZERO: |
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| 86 | return PIPE_BLENDFACTOR_ZERO; |
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| 87 | case GL_ONE_MINUS_SRC_COLOR: |
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| 88 | return PIPE_BLENDFACTOR_INV_SRC_COLOR; |
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| 89 | case GL_ONE_MINUS_SRC_ALPHA: |
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| 90 | return PIPE_BLENDFACTOR_INV_SRC_ALPHA; |
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| 91 | case GL_ONE_MINUS_DST_COLOR: |
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| 92 | return PIPE_BLENDFACTOR_INV_DST_COLOR; |
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| 93 | case GL_ONE_MINUS_DST_ALPHA: |
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| 94 | return PIPE_BLENDFACTOR_INV_DST_ALPHA; |
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| 95 | case GL_ONE_MINUS_CONSTANT_COLOR: |
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| 96 | return PIPE_BLENDFACTOR_INV_CONST_COLOR; |
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| 97 | case GL_ONE_MINUS_CONSTANT_ALPHA: |
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| 98 | return PIPE_BLENDFACTOR_INV_CONST_ALPHA; |
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| 99 | /* |
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| 100 | return PIPE_BLENDFACTOR_INV_SRC1_COLOR; |
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| 101 | return PIPE_BLENDFACTOR_INV_SRC1_ALPHA; |
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| 102 | */ |
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| 103 | default: |
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| 104 | assert("invalid GL token in translate_blend()" == NULL); |
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| 105 | return 0; |
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| 106 | } |
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| 107 | } |
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| 108 | |||
| 109 | |||
| 110 | /** |
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| 111 | * Convert GLenum logicop tokens to pipe tokens. |
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| 112 | */ |
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| 113 | static GLuint |
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| 114 | translate_logicop(GLenum logicop) |
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| 115 | { |
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| 116 | switch (logicop) { |
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| 117 | case GL_CLEAR: |
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| 118 | return PIPE_LOGICOP_CLEAR; |
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| 119 | case GL_NOR: |
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| 120 | return PIPE_LOGICOP_NOR; |
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| 121 | case GL_AND_INVERTED: |
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| 122 | return PIPE_LOGICOP_AND_INVERTED; |
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| 123 | case GL_COPY_INVERTED: |
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| 124 | return PIPE_LOGICOP_COPY_INVERTED; |
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| 125 | case GL_AND_REVERSE: |
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| 126 | return PIPE_LOGICOP_AND_REVERSE; |
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| 127 | case GL_INVERT: |
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| 128 | return PIPE_LOGICOP_INVERT; |
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| 129 | case GL_XOR: |
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| 130 | return PIPE_LOGICOP_XOR; |
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| 131 | case GL_NAND: |
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| 132 | return PIPE_LOGICOP_NAND; |
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| 133 | case GL_AND: |
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| 134 | return PIPE_LOGICOP_AND; |
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| 135 | case GL_EQUIV: |
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| 136 | return PIPE_LOGICOP_EQUIV; |
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| 137 | case GL_NOOP: |
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| 138 | return PIPE_LOGICOP_NOOP; |
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| 139 | case GL_OR_INVERTED: |
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| 140 | return PIPE_LOGICOP_OR_INVERTED; |
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| 141 | case GL_COPY: |
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| 142 | return PIPE_LOGICOP_COPY; |
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| 143 | case GL_OR_REVERSE: |
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| 144 | return PIPE_LOGICOP_OR_REVERSE; |
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| 145 | case GL_OR: |
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| 146 | return PIPE_LOGICOP_OR; |
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| 147 | case GL_SET: |
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| 148 | return PIPE_LOGICOP_SET; |
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| 149 | default: |
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| 150 | assert("invalid GL token in translate_logicop()" == NULL); |
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| 151 | return 0; |
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| 152 | } |
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| 153 | } |
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| 154 | |||
| 155 | /** |
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| 156 | * Figure out if colormasks are different per rt. |
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| 157 | */ |
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| 158 | static GLboolean |
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| 159 | colormask_per_rt(struct gl_context *ctx) |
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| 160 | { |
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| 161 | /* a bit suboptimal have to compare lots of values */ |
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| 162 | unsigned i; |
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| 163 | for (i = 1; i < ctx->Const.MaxDrawBuffers; i++) { |
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| 164 | if (memcmp(ctx->Color.ColorMask[0], ctx->Color.ColorMask[i], 4)) { |
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| 165 | return GL_TRUE; |
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| 166 | } |
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| 167 | } |
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| 168 | return GL_FALSE; |
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| 169 | } |
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| 170 | |||
| 171 | /** |
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| 172 | * Figure out if blend enables are different per rt. |
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| 173 | */ |
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| 174 | static GLboolean |
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| 175 | blend_per_rt(struct gl_context *ctx) |
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| 176 | { |
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| 177 | if (ctx->Color.BlendEnabled && |
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| 178 | (ctx->Color.BlendEnabled != ((1 << ctx->Const.MaxDrawBuffers) - 1))) { |
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| 179 | return GL_TRUE; |
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| 180 | } |
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| 181 | return GL_FALSE; |
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| 182 | } |
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| 183 | |||
| 184 | static void |
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| 185 | update_blend( struct st_context *st ) |
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| 186 | { |
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| 187 | struct pipe_blend_state *blend = &st->state.blend; |
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| 188 | unsigned num_state = 1; |
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| 189 | unsigned i; |
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| 190 | |||
| 191 | memset(blend, 0, sizeof(*blend)); |
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| 192 | |||
| 193 | if (blend_per_rt(st->ctx) || colormask_per_rt(st->ctx)) { |
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| 194 | num_state = st->ctx->Const.MaxDrawBuffers; |
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| 195 | blend->independent_blend_enable = 1; |
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| 196 | } |
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| 197 | /* Note it is impossible to correctly deal with EXT_blend_logic_op and |
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| 198 | EXT_draw_buffers2/EXT_blend_equation_separate at the same time. |
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| 199 | These combinations would require support for per-rt logicop enables |
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| 200 | and separate alpha/rgb logicop/blend support respectively. Neither |
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| 201 | possible in gallium nor most hardware. Assume these combinations |
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| 202 | don't happen. */ |
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| 203 | if (st->ctx->Color.ColorLogicOpEnabled || |
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| 204 | (st->ctx->Color.BlendEnabled && |
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| 205 | st->ctx->Color.BlendEquationRGB == GL_LOGIC_OP)) { |
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| 206 | /* logicop enabled */ |
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| 207 | blend->logicop_enable = 1; |
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| 208 | blend->logicop_func = translate_logicop(st->ctx->Color.LogicOp); |
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| 209 | } |
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| 210 | else if (st->ctx->Color.BlendEnabled) { |
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| 211 | /* blending enabled */ |
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| 212 | for (i = 0; i < num_state; i++) { |
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| 213 | |||
| 214 | blend->rt[i].blend_enable = (st->ctx->Color.BlendEnabled >> i) & 0x1; |
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| 215 | |||
| 216 | blend->rt[i].rgb_func = translate_blend(st->ctx->Color.BlendEquationRGB); |
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| 217 | if (st->ctx->Color.BlendEquationRGB == GL_MIN || |
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| 218 | st->ctx->Color.BlendEquationRGB == GL_MAX) { |
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| 219 | /* Min/max are special */ |
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| 220 | blend->rt[i].rgb_src_factor = PIPE_BLENDFACTOR_ONE; |
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| 221 | blend->rt[i].rgb_dst_factor = PIPE_BLENDFACTOR_ONE; |
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| 222 | } |
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| 223 | else { |
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| 224 | blend->rt[i].rgb_src_factor = translate_blend(st->ctx->Color.BlendSrcRGB); |
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| 225 | blend->rt[i].rgb_dst_factor = translate_blend(st->ctx->Color.BlendDstRGB); |
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| 226 | } |
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| 227 | |||
| 228 | blend->rt[i].alpha_func = translate_blend(st->ctx->Color.BlendEquationA); |
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| 229 | if (st->ctx->Color.BlendEquationA == GL_MIN || |
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| 230 | st->ctx->Color.BlendEquationA == GL_MAX) { |
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| 231 | /* Min/max are special */ |
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| 232 | blend->rt[i].alpha_src_factor = PIPE_BLENDFACTOR_ONE; |
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| 233 | blend->rt[i].alpha_dst_factor = PIPE_BLENDFACTOR_ONE; |
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| 234 | } |
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| 235 | else { |
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| 236 | blend->rt[i].alpha_src_factor = translate_blend(st->ctx->Color.BlendSrcA); |
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| 237 | blend->rt[i].alpha_dst_factor = translate_blend(st->ctx->Color.BlendDstA); |
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| 238 | } |
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| 239 | } |
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| 240 | } |
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| 241 | else { |
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| 242 | /* no blending / logicop */ |
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| 243 | } |
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| 244 | |||
| 245 | /* Colormask - maybe reverse these bits? */ |
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| 246 | for (i = 0; i < num_state; i++) { |
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| 247 | if (st->ctx->Color.ColorMask[i][0]) |
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| 248 | blend->rt[i].colormask |= PIPE_MASK_R; |
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| 249 | if (st->ctx->Color.ColorMask[i][1]) |
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| 250 | blend->rt[i].colormask |= PIPE_MASK_G; |
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| 251 | if (st->ctx->Color.ColorMask[i][2]) |
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| 252 | blend->rt[i].colormask |= PIPE_MASK_B; |
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| 253 | if (st->ctx->Color.ColorMask[i][3]) |
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| 254 | blend->rt[i].colormask |= PIPE_MASK_A; |
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| 255 | } |
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| 256 | |||
| 257 | if (st->ctx->Color.DitherFlag) |
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| 258 | blend->dither = 1; |
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| 259 | |||
| 260 | if (st->ctx->Multisample.Enabled) { |
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| 261 | /* unlike in gallium/d3d10 these operations are only performed |
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| 262 | if msaa is enabled */ |
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| 263 | if (st->ctx->Multisample.SampleAlphaToCoverage) |
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| 264 | blend->alpha_to_coverage = 1; |
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| 265 | if (st->ctx->Multisample.SampleAlphaToOne) |
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| 266 | blend->alpha_to_one = 1; |
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| 267 | } |
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| 268 | |||
| 269 | cso_set_blend(st->cso_context, blend); |
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| 270 | |||
| 271 | { |
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| 272 | struct pipe_blend_color bc; |
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| 273 | COPY_4FV(bc.color, st->ctx->Color.BlendColor); |
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| 274 | cso_set_blend_color(st->cso_context, &bc); |
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| 275 | } |
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| 276 | } |
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| 277 | |||
| 278 | |||
| 279 | const struct st_tracked_state st_update_blend = { |
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| 280 | "st_update_blend", /* name */ |
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| 281 | { /* dirty */ |
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| 282 | (_NEW_COLOR | _NEW_MULTISAMPLE), /* XXX _NEW_BLEND someday? */ /* mesa */ |
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| 283 | 0, /* st */ |
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| 284 | }, |
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| 285 | update_blend, /* update */ |
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| 286 | }; |