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1 /* | 1 /* |
2 * Copyright 2014 Google Inc. | 2 * Copyright 2014 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 GrInvariantOutput_DEFINED | 8 #ifndef GrInvariantOutput_DEFINED |
9 #define GrInvariantOutput_DEFINED | 9 #define GrInvariantOutput_DEFINED |
10 | 10 |
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109 void mulByKnownSingleComponent(uint8_t alpha) { | 109 void mulByKnownSingleComponent(uint8_t alpha) { |
110 if (this->hasZeroAlpha() || 0 == alpha) { | 110 if (this->hasZeroAlpha() || 0 == alpha) { |
111 this->internalSetToTransparentBlack(); | 111 this->internalSetToTransparentBlack(); |
112 } else { | 112 } else { |
113 if (alpha != 255) { | 113 if (alpha != 255) { |
114 // Multiply color by alpha | 114 // Multiply color by alpha |
115 fColor = GrColorPackRGBA(SkMulDiv255Round(GrColorUnpackR(fColor) , alpha), | 115 fColor = GrColorPackRGBA(SkMulDiv255Round(GrColorUnpackR(fColor) , alpha), |
116 SkMulDiv255Round(GrColorUnpackG(fColor) , alpha), | 116 SkMulDiv255Round(GrColorUnpackG(fColor) , alpha), |
117 SkMulDiv255Round(GrColorUnpackB(fColor) , alpha), | 117 SkMulDiv255Round(GrColorUnpackB(fColor) , alpha), |
118 SkMulDiv255Round(GrColorUnpackA(fColor) , alpha)); | 118 SkMulDiv255Round(GrColorUnpackA(fColor) , alpha)); |
119 // We don't need to change fIsSingleComponent in this case | |
119 } | 120 } |
120 } | 121 } |
121 } | 122 } |
122 | 123 |
124 void mulByKnownFourComponents(GrColor color) { | |
125 GrColor a = GrColorUnpackA(color); | |
126 if (a == GrColorUnpackR(color) && | |
127 a == GrColorUnpackG(color) && | |
128 a == GrColorUnpackB(color)) { | |
129 this->mulByKnownSingleComponent(a); | |
130 } else { | |
131 if (color != 0xffffffff) { | |
132 fColor = GrColorPackRGBA( | |
133 SkMulDiv255Round(GrColorUnpackR(fColor), GrColorUnpackR(colo r)), | |
134 SkMulDiv255Round(GrColorUnpackG(fColor), GrColorUnpackG(colo r)), | |
135 SkMulDiv255Round(GrColorUnpackB(fColor), GrColorUnpackB(colo r)), | |
136 SkMulDiv255Round(GrColorUnpackA(fColor), GrColorUnpackA(colo r))); | |
137 if (kRGBA_GrColorComponentFlags == fValidFlags) { | |
138 GrColor a = GrColorUnpackA(fColor); | |
139 fIsSingleComponent = a == GrColorUnpackR(fColor) && | |
140 a == GrColorUnpackG(fColor) && | |
141 a == GrColorUnpackB(fColor); | |
142 } | |
143 } | |
144 } | |
145 } | |
146 | |
147 // Ignores the incoming color's RGB and muls its alpha by color. | |
148 void mulAlphaByKnownFourComponents(GrColor color) { | |
149 GrColor a = GrColorUnpackA(color); | |
150 if (a == GrColorUnpackR(color) && | |
151 a == GrColorUnpackG(color) && | |
152 a == GrColorUnpackB(color)) { | |
153 this->mulAlphaByKnownSingleComponent(a); | |
154 } else if (fValidFlags & kA_GrColorComponentFlag) { | |
155 GrColor alpha = GrColorUnpackA(fColor); | |
156 if (0 == alpha) { | |
157 this->internalSetToTransparentBlack(); | |
158 } else { | |
159 fColor = GrColorPackRGBA( | |
160 SkMulDiv255Round(alpha, GrColorUnpackR(color)), | |
161 SkMulDiv255Round(alpha, GrColorUnpackG(color)), | |
162 SkMulDiv255Round(alpha, GrColorUnpackB(color)), | |
163 SkMulDiv255Round(alpha, GrColorUnpackA(color))); | |
164 fValidFlags = kRGBA_GrColorComponentFlags; | |
165 } | |
166 } else { | |
167 fValidFlags = 0; | |
168 } | |
169 } | |
170 | |
171 // Ignores the incoming color's RGB and muls its alpha by the alpha param an d sets all channels | |
172 // equal to that value. | |
173 void mulAlphaByKnownSingleComponent(uint8_t alpha) { | |
174 if (0 == alpha || 0 == this->hasZeroAlpha()) { | |
175 this->internalSetToTransparentBlack(); | |
176 } else { | |
177 if (fValidFlags & kA_GrColorComponentFlag) { | |
178 GrColor a = GrColorUnpackA(fColor); | |
179 a = SkMulDiv255Round(alpha, a); | |
180 fColor = GrColorPackRGBA(a, a, a, a); | |
181 fValidFlags = kRGBA_GrColorComponentFlags; | |
182 } else { | |
183 fValidFlags = 0; | |
184 } | |
185 fIsSingleComponent = true; | |
186 } | |
187 } | |
188 | |
123 void invalidateComponents(uint8_t invalidateFlags, ReadInput readsInput) { | 189 void invalidateComponents(uint8_t invalidateFlags, ReadInput readsInput) { |
124 fValidFlags &= ~invalidateFlags; | 190 fValidFlags &= ~invalidateFlags; |
125 fIsSingleComponent = false; | 191 fIsSingleComponent = false; |
126 fNonMulStageFound = true; | 192 fNonMulStageFound = true; |
127 if (kWillNot_ReadInput == readsInput) { | 193 if (kWillNot_ReadInput == readsInput) { |
128 fWillUseInputColor = false; | 194 fWillUseInputColor = false; |
129 } | 195 } |
130 } | 196 } |
131 | 197 |
132 void setToOther(uint8_t validFlags, GrColor color, ReadInput readsInput) { | 198 void setToOther(uint8_t validFlags, GrColor color, ReadInput readsInput) { |
133 fValidFlags = validFlags; | 199 fValidFlags = validFlags; |
134 fColor = color; | 200 fColor = color; |
135 fIsSingleComponent = false; | 201 fIsSingleComponent = false; |
136 fNonMulStageFound = true; | 202 fNonMulStageFound = true; |
137 if (kWillNot_ReadInput == readsInput) { | 203 if (kWillNot_ReadInput == readsInput) { |
138 fWillUseInputColor = false; | 204 fWillUseInputColor = false; |
139 } | 205 } |
206 if (kRGBA_GrColorComponentFlags == fValidFlags) { | |
207 GrColor a = GrColorUnpackA(fColor); | |
egdaniel
2015/03/31 21:02:54
Maybe we should create some shared helper that can
bsalomon
2015/04/01 19:54:27
Done.
| |
208 if (GrColorUnpackR(fColor) == a && | |
209 GrColorUnpackG(fColor) == a && | |
210 GrColorUnpackB(fColor) == a) { | |
211 fIsSingleComponent = true; | |
212 } | |
213 } else if (kA_GrColorComponentFlag & fValidFlags) { | |
214 // Assuming fColor is premul means if a is 0 the color | |
215 // must be all 0s. | |
216 if (!GrColorUnpackA(fColor)) { | |
217 SkASSERT(!(kR_GrColorComponentFlag & fValidFlags) || !GrColorUnp ackR(fColor)); | |
egdaniel
2015/03/31 21:02:54
are there asserts really needed? seems like we are
bsalomon
2015/04/01 19:54:26
I think if we're going to assume that we're always
| |
218 SkASSERT(!(kG_GrColorComponentFlag & fValidFlags) || !GrColorUnp ackG(fColor)); | |
219 SkASSERT(!(kB_GrColorComponentFlag & fValidFlags) || !GrColorUnp ackB(fColor)); | |
220 fColor = 0; | |
egdaniel
2015/03/31 21:02:54
just call internalSetToTransparentBlacK()?
| |
221 fIsSingleComponent = true; | |
222 fValidFlags = kRGBA_GrColorComponentFlags; | |
223 } | |
224 } | |
140 } | 225 } |
141 | 226 |
142 void setToUnknown(ReadInput readsInput) { | 227 void setToUnknown(ReadInput readsInput) { |
143 this->internalSetToUnknown(); | 228 this->internalSetToUnknown(); |
144 fNonMulStageFound= true; | 229 fNonMulStageFound= true; |
145 if (kWillNot_ReadInput == readsInput) { | 230 if (kWillNot_ReadInput == readsInput) { |
146 fWillUseInputColor = false; | 231 fWillUseInputColor = false; |
147 } | 232 } |
148 } | 233 } |
149 | 234 |
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225 uint32_t fValidFlags; | 310 uint32_t fValidFlags; |
226 bool fIsSingleComponent; | 311 bool fIsSingleComponent; |
227 bool fNonMulStageFound; | 312 bool fNonMulStageFound; |
228 bool fWillUseInputColor; | 313 bool fWillUseInputColor; |
229 bool fIsLCDCoverage; // Temorary data member until texture pixel configs are updated | 314 bool fIsLCDCoverage; // Temorary data member until texture pixel configs are updated |
230 | 315 |
231 }; | 316 }; |
232 | 317 |
233 #endif | 318 #endif |
234 | 319 |
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