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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 SkColorFilter_DEFINED | 10 #ifndef SkColorFilter_DEFINED |
11 #define SkColorFilter_DEFINED | 11 #define SkColorFilter_DEFINED |
12 | 12 |
13 #include "SkColor.h" | 13 #include "SkColor.h" |
14 #include "SkFlattenable.h" | 14 #include "SkFlattenable.h" |
15 #include "SkXfermode.h" | 15 #include "SkXfermode.h" |
16 | 16 |
17 class SkBitmap; | 17 class SkBitmap; |
18 class GrEffectRef; | 18 class GrEffectRef; |
19 class GrContext; | 19 class GrContext; |
20 | 20 |
| 21 /** |
| 22 * ColorFilters are optional objects in the drawing pipeline. When present in |
| 23 * a paint, they are called with the "src" colors, and return new colors, which |
| 24 * are then passed onto the next stage (either ImageFilter or Xfermode). |
| 25 * |
| 26 * All subclasses are required to be reentrant-safe : it must be legal to share |
| 27 * the same instance between several threads. |
| 28 */ |
21 class SK_API SkColorFilter : public SkFlattenable { | 29 class SK_API SkColorFilter : public SkFlattenable { |
22 public: | 30 public: |
23 SK_DECLARE_INST_COUNT(SkColorFilter) | 31 SK_DECLARE_INST_COUNT(SkColorFilter) |
24 | 32 |
25 /** | 33 /** |
26 * If the filter can be represented by a source color plus Mode, this | 34 * If the filter can be represented by a source color plus Mode, this |
27 * returns true, and sets (if not NULL) the color and mode appropriately. | 35 * returns true, and sets (if not NULL) the color and mode appropriately. |
28 * If not, this returns false and ignores the parameters. | 36 * If not, this returns false and ignores the parameters. |
29 */ | 37 */ |
30 virtual bool asColorMode(SkColor* color, SkXfermode::Mode* mode) const; | 38 virtual bool asColorMode(SkColor* color, SkXfermode::Mode* mode) const; |
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125 SK_DECLARE_FLATTENABLE_REGISTRAR_GROUP() | 133 SK_DECLARE_FLATTENABLE_REGISTRAR_GROUP() |
126 protected: | 134 protected: |
127 SkColorFilter() {} | 135 SkColorFilter() {} |
128 SkColorFilter(SkFlattenableReadBuffer& rb) : INHERITED(rb) {} | 136 SkColorFilter(SkFlattenableReadBuffer& rb) : INHERITED(rb) {} |
129 | 137 |
130 private: | 138 private: |
131 typedef SkFlattenable INHERITED; | 139 typedef SkFlattenable INHERITED; |
132 }; | 140 }; |
133 | 141 |
134 #endif | 142 #endif |
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