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1 /* | 1 /* |
2 * Copyright 2013 Google Inc. | 2 * Copyright 2013 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #ifndef GrPrimitiveProcessor_DEFINED | 8 #ifndef GrPrimitiveProcessor_DEFINED |
9 #define GrPrimitiveProcessor_DEFINED | 9 #define GrPrimitiveProcessor_DEFINED |
10 | 10 |
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106 if (SkToBool(kUseOverrideColor_Flag & fFlags)) { | 106 if (SkToBool(kUseOverrideColor_Flag & fFlags)) { |
107 SkASSERT(SkToBool(kReadsColor_Flag & fFlags)); | 107 SkASSERT(SkToBool(kReadsColor_Flag & fFlags)); |
108 if (overrideColor) { | 108 if (overrideColor) { |
109 *overrideColor = fOverrideColor; | 109 *overrideColor = fOverrideColor; |
110 } | 110 } |
111 return true; | 111 return true; |
112 } | 112 } |
113 return false; | 113 return false; |
114 } | 114 } |
115 | 115 |
| 116 /** |
| 117 * Returns true if the pipeline's color output will be affected by the exist
ing render target |
| 118 * destination pixel values (meaning we need to be careful with overlapping
draws). Note that we |
| 119 * can conflate coverage and color, so the destination color may still bleed
into pixels that |
| 120 * have partial coverage, even if this function returns false. |
| 121 * |
| 122 * The above comment seems incorrect for the use case. This funciton is used
to turn two |
| 123 * overlapping draws into a single draw (really to stencil multiple paths an
d do a single |
| 124 * cover). It seems that what really matters is whether the dst is read for
color OR for |
| 125 * coverage. |
| 126 */ |
| 127 bool willColorBlendWithDst() const { return SkToBool(kWillColorBlendWithDst_
Flag & fFlags); } |
| 128 |
116 private: | 129 private: |
117 enum { | 130 enum { |
118 // If this is not set the primitive processor need not produce a color o
utput | 131 // If this is not set the primitive processor need not produce a color o
utput |
119 kReadsColor_Flag = 0x1, | 132 kReadsColor_Flag = 0x1, |
120 | 133 |
121 // If this is not set the primitive processor need not produce a coverag
e output | 134 // If this is not set the primitive processor need not produce a coverag
e output |
122 kReadsCoverage_Flag = 0x2, | 135 kReadsCoverage_Flag = 0x2, |
123 | 136 |
124 // If this is not set the primitive processor need not produce local coo
rdinates | 137 // If this is not set the primitive processor need not produce local coo
rdinates |
125 kReadsLocalCoords_Flag = 0x4, | 138 kReadsLocalCoords_Flag = 0x4, |
126 | 139 |
127 // If this flag is set then the primitive processor may produce color*co
verage as | 140 // If this flag is set then the primitive processor may produce color*co
verage as |
128 // its color output (and not output a separate coverage). | 141 // its color output (and not output a separate coverage). |
129 kCanTweakAlphaForCoverage_Flag = 0x8, | 142 kCanTweakAlphaForCoverage_Flag = 0x8, |
130 | 143 |
131 // If this flag is set the GrPrimitiveProcessor must produce fOverrideCo
lor as its | 144 // If this flag is set the GrPrimitiveProcessor must produce fOverrideCo
lor as its |
132 // output color. If not set fOverrideColor is to be ignored. | 145 // output color. If not set fOverrideColor is to be ignored. |
133 kUseOverrideColor_Flag = 0x10, | 146 kUseOverrideColor_Flag = 0x10, |
| 147 |
| 148 kWillColorBlendWithDst_Flag = 0x20, |
134 }; | 149 }; |
135 | 150 |
136 uint32_t fFlags; | 151 uint32_t fFlags; |
137 GrColor fOverrideColor; | 152 GrColor fOverrideColor; |
138 | 153 |
139 friend class GrPipeline; // To initialize this | 154 friend class GrPipeline; // To initialize this |
140 }; | 155 }; |
141 | 156 |
142 /* | 157 /* |
143 * This enum is shared by GrPrimitiveProcessors and GrGLPrimitiveProcessors to c
oordinate shaders | 158 * This enum is shared by GrPrimitiveProcessors and GrGLPrimitiveProcessors to c
oordinate shaders |
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244 | 259 |
245 private: | 260 private: |
246 virtual bool hasExplicitLocalCoords() const = 0; | 261 virtual bool hasExplicitLocalCoords() const = 0; |
247 | 262 |
248 bool fIsPathRendering; | 263 bool fIsPathRendering; |
249 | 264 |
250 typedef GrProcessor INHERITED; | 265 typedef GrProcessor INHERITED; |
251 }; | 266 }; |
252 | 267 |
253 #endif | 268 #endif |
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