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1 /* | 1 /* |
2 * Copyright 2013 Google Inc. | 2 * Copyright 2013 Google Inc. |
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 SkMipMap_DEFINED | 8 #ifndef SkMipMap_DEFINED |
9 #define SkMipMap_DEFINED | 9 #define SkMipMap_DEFINED |
10 | 10 |
11 #include "SkCachedData.h" | 11 #include "SkCachedData.h" |
12 #include "SkPixmap.h" | 12 #include "SkPixmap.h" |
13 #include "SkScalar.h" | 13 #include "SkScalar.h" |
14 #include "SkSize.h" | 14 #include "SkSize.h" |
| 15 #include "SkShader.h" |
15 | 16 |
16 class SkBitmap; | 17 class SkBitmap; |
17 class SkDiscardableMemory; | 18 class SkDiscardableMemory; |
18 | 19 |
19 typedef SkDiscardableMemory* (*SkDiscardableFactoryProc)(size_t bytes); | 20 typedef SkDiscardableMemory* (*SkDiscardableFactoryProc)(size_t bytes); |
20 | 21 |
21 /* | 22 /* |
22 * SkMipMap will generate mipmap levels when given a base mipmap level image. | 23 * SkMipMap will generate mipmap levels when given a base mipmap level image. |
23 * | 24 * |
24 * Any function which deals with mipmap levels indices will start with index 0 | 25 * Any function which deals with mipmap levels indices will start with index 0 |
25 * being the first mipmap level which was generated. Said another way, it does | 26 * being the first mipmap level which was generated. Said another way, it does |
26 * not include the base level in its range. | 27 * not include the base level in its range. |
27 */ | 28 */ |
28 class SkMipMap : public SkCachedData { | 29 class SkMipMap : public SkCachedData { |
29 public: | 30 public: |
30 static SkMipMap* Build(const SkPixmap& src, SkDiscardableFactoryProc); | 31 static SkMipMap* Build(const SkPixmap& src, SkSourceGammaTreatment, SkDiscar
dableFactoryProc); |
31 static SkMipMap* Build(const SkBitmap& src, SkDiscardableFactoryProc); | 32 static SkMipMap* Build(const SkBitmap& src, SkSourceGammaTreatment, SkDiscar
dableFactoryProc); |
| 33 |
| 34 static SkSourceGammaTreatment DeduceTreatment(const SkShader::ContextRec& re
c) { |
| 35 return (SkShader::ContextRec::kPMColor_DstType == rec.fPreferredDstType)
? |
| 36 SkSourceGammaTreatment::kIgnore : SkSourceGammaTreatment::kRespe
ct; |
| 37 } |
32 | 38 |
33 // Determines how many levels a SkMipMap will have without creating that mip
map. | 39 // Determines how many levels a SkMipMap will have without creating that mip
map. |
34 // This does not include the base mipmap level that the user provided when | 40 // This does not include the base mipmap level that the user provided when |
35 // creating the SkMipMap. | 41 // creating the SkMipMap. |
36 static int ComputeLevelCount(int baseWidth, int baseHeight); | 42 static int ComputeLevelCount(int baseWidth, int baseHeight); |
37 | 43 |
38 // Determines the size of a given mipmap level. | 44 // Determines the size of a given mipmap level. |
39 // |level| is an index into the generated mipmap levels. It does not include | 45 // |level| is an index into the generated mipmap levels. It does not include |
40 // the base level. So index 0 represents mipmap level 1. | 46 // the base level. So index 0 represents mipmap level 1. |
41 static SkISize ComputeLevelSize(int baseWidth, int baseHeight, int level); | 47 static SkISize ComputeLevelSize(int baseWidth, int baseHeight, int level); |
(...skipping 12 matching lines...) Expand all Loading... |
54 // |index| is an index into the generated mipmap levels. It does not include | 60 // |index| is an index into the generated mipmap levels. It does not include |
55 // the base level. So index 0 represents mipmap level 1. | 61 // the base level. So index 0 represents mipmap level 1. |
56 bool getLevel(int index, Level*) const; | 62 bool getLevel(int index, Level*) const; |
57 | 63 |
58 protected: | 64 protected: |
59 void onDataChange(void* oldData, void* newData) override { | 65 void onDataChange(void* oldData, void* newData) override { |
60 fLevels = (Level*)newData; // could be nullptr | 66 fLevels = (Level*)newData; // could be nullptr |
61 } | 67 } |
62 | 68 |
63 private: | 69 private: |
64 Level* fLevels; | 70 sk_sp<SkColorSpace> fCS; |
65 int fCount; | 71 Level* fLevels; // managed by the baseclass, may be null due
to onDataChanged. |
| 72 int fCount; |
66 | 73 |
67 // we take ownership of levels, and will free it with sk_free() | |
68 SkMipMap(void* malloc, size_t size) : INHERITED(malloc, size) {} | 74 SkMipMap(void* malloc, size_t size) : INHERITED(malloc, size) {} |
69 SkMipMap(size_t size, SkDiscardableMemory* dm) : INHERITED(size, dm) {} | 75 SkMipMap(size_t size, SkDiscardableMemory* dm) : INHERITED(size, dm) {} |
70 | 76 |
71 static size_t AllocLevelsSize(int levelCount, size_t pixelSize); | 77 static size_t AllocLevelsSize(int levelCount, size_t pixelSize); |
72 | 78 |
73 typedef SkCachedData INHERITED; | 79 typedef SkCachedData INHERITED; |
74 }; | 80 }; |
75 | 81 |
76 #endif | 82 #endif |
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