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1 | 1 |
2 /* | 2 /* |
3 * Copyright 2006 The Android Open Source Project | 3 * Copyright 2006 The Android Open Source Project |
4 * | 4 * |
5 * Use of this source code is governed by a BSD-style license that can be | 5 * Use of this source code is governed by a BSD-style license that can be |
6 * found in the LICENSE file. | 6 * found in the LICENSE file. |
7 */ | 7 */ |
8 | 8 |
9 | 9 |
10 #ifndef SkXfermode_DEFINED | 10 #ifndef SkXfermode_DEFINED |
11 #define SkXfermode_DEFINED | 11 #define SkXfermode_DEFINED |
12 | 12 |
13 #include "SkFlattenable.h" | 13 #include "SkFlattenable.h" |
14 #include "SkColor.h" | 14 #include "SkColor.h" |
15 | 15 |
16 class GrFragmentProcessor; | 16 class GrFragmentProcessor; |
17 class GrTexture; | 17 class GrTexture; |
18 class GrXPFactory; | 18 class GrXPFactory; |
19 class SkString; | 19 class SkString; |
20 class SkValue; | |
21 | 20 |
22 /** \class SkXfermode | 21 /** \class SkXfermode |
23 * | 22 * |
24 * SkXfermode is the base class for objects that are called to implement custom | 23 * 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) | 24 * "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 | 25 * can be called to return an instance of any of the predefined subclasses as |
27 * specified in the Modes enum. When an SkXfermode is assigned to an SkPaint, | 26 * specified in the Modes enum. When an SkXfermode is assigned to an SkPaint, |
28 * then objects drawn with that paint have the xfermode applied. | 27 * then objects drawn with that paint have the xfermode applied. |
29 * | 28 * |
30 * All subclasses are required to be reentrant-safe : it must be legal to share | 29 * All subclasses are required to be reentrant-safe : it must be legal to share |
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240 This method will not be called directly by the client, so it need not | 239 This method will not be called directly by the client, so it need not |
241 be implemented if your subclass has overridden xfer32/xfer16/xferA8 | 240 be implemented if your subclass has overridden xfer32/xfer16/xferA8 |
242 */ | 241 */ |
243 virtual SkPMColor xferColor(SkPMColor src, SkPMColor dst) const; | 242 virtual SkPMColor xferColor(SkPMColor src, SkPMColor dst) const; |
244 | 243 |
245 private: | 244 private: |
246 enum { | 245 enum { |
247 kModeCount = kLastMode + 1 | 246 kModeCount = kLastMode + 1 |
248 }; | 247 }; |
249 | 248 |
250 template<typename T> friend SkValue SkToValue(const T*); | |
251 virtual SkValue asValue() const; | |
252 | |
253 typedef SkFlattenable INHERITED; | 249 typedef SkFlattenable INHERITED; |
254 }; | 250 }; |
255 | 251 |
256 #endif | 252 #endif |
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