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1 /* | 1 /* |
2 * Copyright 2012 Google Inc. | 2 * Copyright 2012 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 SkMaskGamma_DEFINED | 8 #ifndef SkMaskGamma_DEFINED |
9 #define SkMaskGamma_DEFINED | 9 #define SkMaskGamma_DEFINED |
10 | 10 |
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161 | 161 |
162 typedef SkRefCnt INHERITED; | 162 typedef SkRefCnt INHERITED; |
163 }; | 163 }; |
164 | 164 |
165 | 165 |
166 /** | 166 /** |
167 * SkTMaskPreBlend is a tear-off of SkTMaskGamma. It provides the tables to | 167 * SkTMaskPreBlend is a tear-off of SkTMaskGamma. It provides the tables to |
168 * convert a linear alpha value for a given channel to a gamma correcting alpha | 168 * convert a linear alpha value for a given channel to a gamma correcting alpha |
169 * value for that channel. This class is immutable. | 169 * value for that channel. This class is immutable. |
170 * | 170 * |
171 * If fR, fG, or fB is NULL, all of them will be. This indicates that no mask | 171 * If fR, fG, or fB is nullptr, all of them will be. This indicates that no mask |
172 * pre blend should be applied. SkTMaskPreBlend::isApplicable() is provided as | 172 * pre blend should be applied. SkTMaskPreBlend::isApplicable() is provided as |
173 * a convenience function to test for the absence of this case. | 173 * a convenience function to test for the absence of this case. |
174 */ | 174 */ |
175 template <int R_LUM_BITS, int G_LUM_BITS, int B_LUM_BITS> class SkTMaskPreBlend
{ | 175 template <int R_LUM_BITS, int G_LUM_BITS, int B_LUM_BITS> class SkTMaskPreBlend
{ |
176 private: | 176 private: |
177 SkTMaskPreBlend(const SkTMaskGamma<R_LUM_BITS, G_LUM_BITS, B_LUM_BITS>* pare
nt, | 177 SkTMaskPreBlend(const SkTMaskGamma<R_LUM_BITS, G_LUM_BITS, B_LUM_BITS>* pare
nt, |
178 const uint8_t* r, const uint8_t* g, const uint8_t* b) | 178 const uint8_t* r, const uint8_t* g, const uint8_t* b) |
179 : fParent(SkSafeRef(parent)), fR(r), fG(g), fB(b) { } | 179 : fParent(SkSafeRef(parent)), fR(r), fG(g), fB(b) { } |
180 | 180 |
181 SkAutoTUnref<const SkTMaskGamma<R_LUM_BITS, G_LUM_BITS, B_LUM_BITS> > fParen
t; | 181 SkAutoTUnref<const SkTMaskGamma<R_LUM_BITS, G_LUM_BITS, B_LUM_BITS> > fParen
t; |
182 friend class SkTMaskGamma<R_LUM_BITS, G_LUM_BITS, B_LUM_BITS>; | 182 friend class SkTMaskGamma<R_LUM_BITS, G_LUM_BITS, B_LUM_BITS>; |
183 public: | 183 public: |
184 /** Creates a non applicable SkTMaskPreBlend. */ | 184 /** Creates a non applicable SkTMaskPreBlend. */ |
185 SkTMaskPreBlend() : fParent(), fR(NULL), fG(NULL), fB(NULL) { } | 185 SkTMaskPreBlend() : fParent(), fR(nullptr), fG(nullptr), fB(nullptr) { } |
186 | 186 |
187 /** | 187 /** |
188 * This copy contructor exists for correctness, but should never be called | 188 * This copy contructor exists for correctness, but should never be called |
189 * when return value optimization is enabled. | 189 * when return value optimization is enabled. |
190 */ | 190 */ |
191 SkTMaskPreBlend(const SkTMaskPreBlend<R_LUM_BITS, G_LUM_BITS, B_LUM_BITS>& t
hat) | 191 SkTMaskPreBlend(const SkTMaskPreBlend<R_LUM_BITS, G_LUM_BITS, B_LUM_BITS>& t
hat) |
192 : fParent(SkSafeRef(that.fParent.get())), fR(that.fR), fG(that.fG), fB(that.
fB) { } | 192 : fParent(SkSafeRef(that.fParent.get())), fR(that.fR), fG(that.fG), fB(that.
fB) { } |
193 | 193 |
194 ~SkTMaskPreBlend() { } | 194 ~SkTMaskPreBlend() { } |
195 | 195 |
196 /** True if this PreBlend should be applied. When false, fR, fG, and fB are
NULL. */ | 196 /** True if this PreBlend should be applied. When false, fR, fG, and fB are
nullptr. */ |
197 bool isApplicable() const { return SkToBool(this->fG); } | 197 bool isApplicable() const { return SkToBool(this->fG); } |
198 | 198 |
199 const uint8_t* fR; | 199 const uint8_t* fR; |
200 const uint8_t* fG; | 200 const uint8_t* fG; |
201 const uint8_t* fB; | 201 const uint8_t* fB; |
202 }; | 202 }; |
203 | 203 |
204 template <int R_LUM_BITS, int G_LUM_BITS, int B_LUM_BITS> | 204 template <int R_LUM_BITS, int G_LUM_BITS, int B_LUM_BITS> |
205 SkTMaskPreBlend<R_LUM_BITS, G_LUM_BITS, B_LUM_BITS> | 205 SkTMaskPreBlend<R_LUM_BITS, G_LUM_BITS, B_LUM_BITS> |
206 SkTMaskGamma<R_LUM_BITS, G_LUM_BITS, B_LUM_BITS>::preBlend(SkColor color) const
{ | 206 SkTMaskGamma<R_LUM_BITS, G_LUM_BITS, B_LUM_BITS>::preBlend(SkColor color) const
{ |
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221 */ | 221 */ |
222 template<bool APPLY_LUT> static inline U8CPU sk_apply_lut_if(U8CPU component, co
nst uint8_t*) { | 222 template<bool APPLY_LUT> static inline U8CPU sk_apply_lut_if(U8CPU component, co
nst uint8_t*) { |
223 return component; | 223 return component; |
224 } | 224 } |
225 template<> /*static*/ inline U8CPU sk_apply_lut_if<true>(U8CPU component, const
uint8_t* lut) { | 225 template<> /*static*/ inline U8CPU sk_apply_lut_if<true>(U8CPU component, const
uint8_t* lut) { |
226 return lut[component]; | 226 return lut[component]; |
227 } | 227 } |
228 ///@} | 228 ///@} |
229 | 229 |
230 #endif | 230 #endif |
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