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1 /* | 1 /* |
2 * Copyright 2006 The Android Open Source Project | 2 * Copyright 2006 The Android Open Source Project |
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 SkXfermode_DEFINED | 8 #ifndef SkXfermode_DEFINED |
9 #define SkXfermode_DEFINED | 9 #define SkXfermode_DEFINED |
10 | 10 |
11 #include "SkFlattenable.h" | 11 #include "SkFlattenable.h" |
12 #include "SkColor.h" | 12 #include "SkColor.h" |
13 | 13 |
14 class GrFragmentProcessor; | 14 class GrFragmentProcessor; |
15 class GrTexture; | 15 class GrTexture; |
16 class GrXPFactory; | 16 class GrXPFactory; |
| 17 class SkRasterPipeline; |
17 class SkString; | 18 class SkString; |
18 | 19 |
19 struct SkPM4f; | 20 struct SkPM4f; |
20 typedef SkPM4f (*SkXfermodeProc4f)(const SkPM4f& src, const SkPM4f& dst); | 21 typedef SkPM4f (*SkXfermodeProc4f)(const SkPM4f& src, const SkPM4f& dst); |
21 | 22 |
22 /** \class SkXfermode | 23 /** \class SkXfermode |
23 * | 24 * |
24 * SkXfermode is the base class for objects that are called to implement custom | 25 * SkXfermode is the base class for objects that are called to implement custom |
25 * "transfer-modes" in the drawing pipeline. The static function Create(Modes) | 26 * "transfer-modes" in the drawing pipeline. The static function Create(Modes) |
26 * can be called to return an instance of any of the predefined subclasses as | 27 * can be called to return an instance of any of the predefined subclasses as |
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157 #endif | 158 #endif |
158 | 159 |
159 /** Return a function pointer to a routine that applies the specified | 160 /** Return a function pointer to a routine that applies the specified |
160 porter-duff transfer mode. | 161 porter-duff transfer mode. |
161 */ | 162 */ |
162 static SkXfermodeProc GetProc(Mode mode); | 163 static SkXfermodeProc GetProc(Mode mode); |
163 static SkXfermodeProc4f GetProc4f(Mode); | 164 static SkXfermodeProc4f GetProc4f(Mode); |
164 | 165 |
165 virtual SkXfermodeProc4f getProc4f() const; | 166 virtual SkXfermodeProc4f getProc4f() const; |
166 | 167 |
| 168 bool appendStages(SkRasterPipeline*) const; |
| 169 |
167 /** | 170 /** |
168 * If the specified mode can be represented by a pair of Coeff, then return | 171 * If the specified mode can be represented by a pair of Coeff, then return |
169 * true and set (if not NULL) the corresponding coeffs. If the mode is | 172 * true and set (if not NULL) the corresponding coeffs. If the mode is |
170 * not representable as a pair of Coeffs, return false and ignore the | 173 * not representable as a pair of Coeffs, return false and ignore the |
171 * src and dst parameters. | 174 * src and dst parameters. |
172 */ | 175 */ |
173 static bool ModeAsCoeff(Mode mode, Coeff* src, Coeff* dst); | 176 static bool ModeAsCoeff(Mode mode, Coeff* src, Coeff* dst); |
174 | 177 |
175 /** | 178 /** |
176 * Returns whether or not the xfer mode can support treating coverage as alp
ha | 179 * Returns whether or not the xfer mode can support treating coverage as alp
ha |
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209 * the xfermode is NULL, and if so, treats it as kSrcOver_Mode. | 212 * the xfermode is NULL, and if so, treats it as kSrcOver_Mode. |
210 */ | 213 */ |
211 static bool IsOpaque(const SkXfermode* xfer, SrcColorOpacity opacityType); | 214 static bool IsOpaque(const SkXfermode* xfer, SrcColorOpacity opacityType); |
212 static bool IsOpaque(const sk_sp<SkXfermode>& xfer, SrcColorOpacity opacityT
ype) { | 215 static bool IsOpaque(const sk_sp<SkXfermode>& xfer, SrcColorOpacity opacityT
ype) { |
213 return IsOpaque(xfer.get(), opacityType); | 216 return IsOpaque(xfer.get(), opacityType); |
214 } | 217 } |
215 | 218 |
216 #if SK_SUPPORT_GPU | 219 #if SK_SUPPORT_GPU |
217 /** Used by the SkXfermodeImageFilter to blend two colors via a GrFragmentPr
ocessor. | 220 /** Used by the SkXfermodeImageFilter to blend two colors via a GrFragmentPr
ocessor. |
218 The input to the returned FP is the src color. The dst color is | 221 The input to the returned FP is the src color. The dst color is |
219 provided by the dst param which becomes a child FP of the returned FP. | 222 provided by the dst param which becomes a child FP of the returned FP. |
220 It is legal for the function to return a null output. This indicates tha
t | 223 It is legal for the function to return a null output. This indicates tha
t |
221 the output of the blend is simply the src color. | 224 the output of the blend is simply the src color. |
222 */ | 225 */ |
223 virtual sk_sp<GrFragmentProcessor> makeFragmentProcessorForImageFilter( | 226 virtual sk_sp<GrFragmentProcessor> makeFragmentProcessorForImageFilter( |
224 sk_sp<GrFragmentProc
essor> dst) const; | 227 sk_sp<GrFragmentProc
essor> dst) const; |
225 | 228 |
226 /** A subclass must implement this factory function to work with the GPU bac
kend. | 229 /** A subclass must implement this factory function to work with the GPU bac
kend. |
227 The xfermode will return a factory for which the caller will get a ref.
It is up | 230 The xfermode will return a factory for which the caller will get a ref.
It is up |
228 to the caller to install it. XferProcessors cannot use a background text
ure. | 231 to the caller to install it. XferProcessors cannot use a background text
ure. |
229 */ | 232 */ |
230 virtual sk_sp<GrXPFactory> asXPFactory() const; | 233 virtual sk_sp<GrXPFactory> asXPFactory() const; |
231 #endif | 234 #endif |
232 | 235 |
233 SK_TO_STRING_PUREVIRT() | 236 SK_TO_STRING_PUREVIRT() |
234 SK_DECLARE_FLATTENABLE_REGISTRAR_GROUP() | 237 SK_DECLARE_FLATTENABLE_REGISTRAR_GROUP() |
235 SK_DEFINE_FLATTENABLE_TYPE(SkXfermode) | 238 SK_DEFINE_FLATTENABLE_TYPE(SkXfermode) |
236 | 239 |
237 enum D32Flags { | 240 enum D32Flags { |
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274 implementation of this method just returns dst. If performance is | 277 implementation of this method just returns dst. If performance is |
275 important, your subclass should override xfer32/xfer16/xferA8 directly. | 278 important, your subclass should override xfer32/xfer16/xferA8 directly. |
276 | 279 |
277 This method will not be called directly by the client, so it need not | 280 This method will not be called directly by the client, so it need not |
278 be implemented if your subclass has overridden xfer32/xfer16/xferA8 | 281 be implemented if your subclass has overridden xfer32/xfer16/xferA8 |
279 */ | 282 */ |
280 virtual SkPMColor xferColor(SkPMColor src, SkPMColor dst) const; | 283 virtual SkPMColor xferColor(SkPMColor src, SkPMColor dst) const; |
281 | 284 |
282 virtual D32Proc onGetD32Proc(uint32_t flags) const; | 285 virtual D32Proc onGetD32Proc(uint32_t flags) const; |
283 virtual F16Proc onGetF16Proc(uint32_t flags) const; | 286 virtual F16Proc onGetF16Proc(uint32_t flags) const; |
| 287 virtual bool onAppendStages(SkRasterPipeline*) const; |
284 | 288 |
285 private: | 289 private: |
286 enum { | 290 enum { |
287 kModeCount = kLastMode + 1 | 291 kModeCount = kLastMode + 1 |
288 }; | 292 }; |
289 | 293 |
290 typedef SkFlattenable INHERITED; | 294 typedef SkFlattenable INHERITED; |
291 }; | 295 }; |
292 | 296 |
293 #endif | 297 #endif |
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