OLD | NEW |
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 SkTableMaskFilter_DEFINED | 8 #ifndef SkTableMaskFilter_DEFINED |
9 #define SkTableMaskFilter_DEFINED | 9 #define SkTableMaskFilter_DEFINED |
10 | 10 |
11 #include "SkMaskFilter.h" | 11 #include "SkMaskFilter.h" |
12 #include "SkScalar.h" | 12 #include "SkScalar.h" |
13 | 13 |
14 /** \class SkTableMaskFilter | 14 /** \class SkTableMaskFilter |
15 | 15 |
16 Applies a table lookup on each of the alpha values in the mask. | 16 Applies a table lookup on each of the alpha values in the mask. |
17 Helper methods create some common tables (e.g. gamma, clipping) | 17 Helper methods create some common tables (e.g. gamma, clipping) |
18 */ | 18 */ |
19 class SK_API SkTableMaskFilter : public SkMaskFilter { | 19 class SK_API SkTableMaskFilter : public SkMaskFilter { |
20 public: | 20 public: |
| 21 virtual ~SkTableMaskFilter(); |
| 22 |
21 /** Utility that sets the gamma table | 23 /** Utility that sets the gamma table |
22 */ | 24 */ |
23 static void MakeGammaTable(uint8_t table[256], SkScalar gamma); | 25 static void MakeGammaTable(uint8_t table[256], SkScalar gamma); |
24 | 26 |
25 /** Utility that creates a clipping table: clamps values below min to 0 | 27 /** Utility that creates a clipping table: clamps values below min to 0 |
26 and above max to 255, and rescales the remaining into 0..255 | 28 and above max to 255, and rescales the remaining into 0..255 |
27 */ | 29 */ |
28 static void MakeClipTable(uint8_t table[256], uint8_t min, uint8_t max); | 30 static void MakeClipTable(uint8_t table[256], uint8_t min, uint8_t max); |
29 | 31 |
30 static SkMaskFilter* Create(const uint8_t table[256]) { | 32 static SkTableMaskFilter* Create(const uint8_t table[256]) { |
31 return new SkTableMaskFilter(table); | 33 return new SkTableMaskFilter(table); |
32 } | 34 } |
33 | 35 |
34 static SkMaskFilter* CreateGamma(SkScalar gamma) { | 36 static SkTableMaskFilter* CreateGamma(SkScalar gamma) { |
35 uint8_t table[256]; | 37 uint8_t table[256]; |
36 MakeGammaTable(table, gamma); | 38 MakeGammaTable(table, gamma); |
37 return new SkTableMaskFilter(table); | 39 return new SkTableMaskFilter(table); |
38 } | 40 } |
39 | 41 |
40 static SkMaskFilter* CreateClip(uint8_t min, uint8_t max) { | 42 static SkTableMaskFilter* CreateClip(uint8_t min, uint8_t max) { |
41 uint8_t table[256]; | 43 uint8_t table[256]; |
42 MakeClipTable(table, min, max); | 44 MakeClipTable(table, min, max); |
43 return new SkTableMaskFilter(table); | 45 return new SkTableMaskFilter(table); |
44 } | 46 } |
45 | 47 |
46 SkMask::Format getFormat() const override; | 48 SkMask::Format getFormat() const override; |
47 bool filterMask(SkMask*, const SkMask&, const SkMatrix&, SkIPoint*) const ov
erride; | 49 virtual bool filterMask(SkMask*, const SkMask&, const SkMatrix&, |
| 50 SkIPoint*) const override; |
48 | 51 |
49 SK_TO_STRING_OVERRIDE() | 52 SK_TO_STRING_OVERRIDE() |
50 SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkTableMaskFilter) | 53 SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkTableMaskFilter) |
51 | 54 |
52 protected: | 55 protected: |
53 virtual ~SkTableMaskFilter(); | 56 SkTableMaskFilter(); |
54 | 57 explicit SkTableMaskFilter(const uint8_t table[256]); |
55 void flatten(SkWriteBuffer&) const override; | 58 void flatten(SkWriteBuffer&) const override; |
56 | 59 |
57 private: | 60 private: |
58 SkTableMaskFilter(); | |
59 explicit SkTableMaskFilter(const uint8_t table[256]); | |
60 | |
61 uint8_t fTable[256]; | 61 uint8_t fTable[256]; |
62 | 62 |
63 typedef SkMaskFilter INHERITED; | 63 typedef SkMaskFilter INHERITED; |
64 }; | 64 }; |
65 | 65 |
66 #endif | 66 #endif |
OLD | NEW |