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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 GrContext; | 16 class GrContext; |
17 class GrEffectRef; | 17 class GrEffectRef; |
18 class GrTexture; | 18 class GrTexture; |
19 class SkString; | 19 class SkString; |
20 | 20 |
21 /** \class SkXfermode | 21 /** \class SkXfermode |
22 | 22 |
23 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 |
mtklein
2013/10/10 17:33:14
add some stars up here?
| |
24 "transfer-modes" in the drawing pipeline. The static function Create(Modes) | 24 "transfer-modes" in the drawing pipeline. The static function Create(Modes) |
25 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 |
26 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, |
27 then objects drawn with that paint have the xfermode applied. | 27 then objects drawn with that paint have the xfermode applied. |
28 */ | 28 |
29 * All subclasses are required to be reentrant-safe : it must be legal to share | |
30 * the same instance between several threads. | |
31 */ | |
29 class SK_API SkXfermode : public SkFlattenable { | 32 class SK_API SkXfermode : public SkFlattenable { |
30 public: | 33 public: |
31 SK_DECLARE_INST_COUNT(SkXfermode) | 34 SK_DECLARE_INST_COUNT(SkXfermode) |
32 | 35 |
33 SkXfermode() {} | 36 SkXfermode() {} |
34 | 37 |
35 virtual void xfer32(SkPMColor dst[], const SkPMColor src[], int count, | 38 virtual void xfer32(SkPMColor dst[], const SkPMColor src[], int count, |
36 const SkAlpha aa[]) const; | 39 const SkAlpha aa[]) const; |
37 virtual void xfer16(uint16_t dst[], const SkPMColor src[], int count, | 40 virtual void xfer16(uint16_t dst[], const SkPMColor src[], int count, |
38 const SkAlpha aa[]) const; | 41 const SkAlpha aa[]) const; |
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279 return fProc; | 282 return fProc; |
280 } | 283 } |
281 | 284 |
282 private: | 285 private: |
283 SkXfermodeProc fProc; | 286 SkXfermodeProc fProc; |
284 | 287 |
285 typedef SkXfermode INHERITED; | 288 typedef SkXfermode INHERITED; |
286 }; | 289 }; |
287 | 290 |
288 #endif | 291 #endif |
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