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1 /* | 1 /* |
2 * Copyright 2010 Google Inc. | 2 * Copyright 2010 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 GrFontScaler_DEFINED | 8 #ifndef GrFontScaler_DEFINED |
9 #define GrFontScaler_DEFINED | 9 #define GrFontScaler_DEFINED |
10 | 10 |
11 #include "GrGlyph.h" | 11 #include "GrGlyph.h" |
12 #include "GrTypes.h" | 12 #include "GrTypes.h" |
13 | 13 |
14 #include "SkDescriptor.h" | 14 #include "SkDescriptor.h" |
15 | 15 |
16 class SkGlyph; | 16 class SkGlyph; |
17 class SkPath; | 17 class SkPath; |
18 | 18 |
19 /* | 19 /* |
20 * Wrapper class to turn a font cache descriptor into a key | |
21 * for GrFontScaler-related lookups | |
22 */ | |
23 class GrFontDescKey : public SkRefCnt { | |
24 public: | |
25 explicit GrFontDescKey(const SkDescriptor& desc) : fDesc(desc), fHash(desc.g
etChecksum()) {} | |
26 | |
27 uint32_t getHash() const { return fHash; } | |
28 | |
29 bool operator==(const GrFontDescKey& rh) const { | |
30 return fHash == rh.fHash && *fDesc.getDesc() == *rh.fDesc.getDesc(); | |
31 } | |
32 | |
33 private: | |
34 SkAutoDescriptor fDesc; | |
35 uint32_t fHash; | |
36 | |
37 typedef SkRefCnt INHERITED; | |
38 }; | |
39 | |
40 /* | |
41 * This is Gr's interface to the host platform's font scaler. | 20 * This is Gr's interface to the host platform's font scaler. |
42 * | 21 * |
43 * The client is responsible for instantiating this. The instance is created | 22 * The client is responsible for instantiating this. The instance is created |
44 * for a specific font+size+matrix. | 23 * for a specific font+size+matrix. |
45 */ | 24 */ |
46 class GrFontScaler final : public SkNoncopyable { | 25 class GrFontScaler final : public SkNoncopyable { |
47 public: | 26 public: |
48 explicit GrFontScaler(SkGlyphCache* strike); | 27 explicit GrFontScaler(SkGlyphCache* strike); |
49 ~GrFontScaler(); | |
50 | 28 |
51 const GrFontDescKey* getKey(); | 29 const SkDescriptor& getKey(); |
52 GrMaskFormat getMaskFormat() const; | |
53 GrMaskFormat getPackedGlyphMaskFormat(const SkGlyph&) const; | 30 GrMaskFormat getPackedGlyphMaskFormat(const SkGlyph&) const; |
54 bool getPackedGlyphBounds(const SkGlyph&, SkIRect* bounds); | 31 bool getPackedGlyphBounds(const SkGlyph&, SkIRect* bounds); |
55 bool getPackedGlyphImage(const SkGlyph&, int width, int height, int rowBytes
, | 32 bool getPackedGlyphImage(const SkGlyph&, int width, int height, int rowBytes
, |
56 GrMaskFormat expectedMaskFormat, void* image); | 33 GrMaskFormat expectedMaskFormat, void* image); |
57 bool getPackedGlyphDFBounds(const SkGlyph&, SkIRect* bounds); | 34 bool getPackedGlyphDFBounds(const SkGlyph&, SkIRect* bounds); |
58 bool getPackedGlyphDFImage(const SkGlyph&, int width, int height, void* imag
e); | 35 bool getPackedGlyphDFImage(const SkGlyph&, int width, int height, void* imag
e); |
59 const SkPath* getGlyphPath(const SkGlyph&); | 36 const SkPath* getGlyphPath(const SkGlyph&); |
60 const SkGlyph& grToSkGlyph(GrGlyph::PackedID); | 37 const SkGlyph& grToSkGlyph(GrGlyph::PackedID); |
61 | 38 |
62 private: | 39 private: |
63 // The SkGlyphCache actually owns this GrFontScaler. The GrFontScaler is del
eted when the | 40 // The SkGlyphCache actually owns this GrFontScaler. The GrFontScaler is del
eted when the |
64 // SkGlyphCache is deleted. | 41 // SkGlyphCache is deleted. |
65 SkGlyphCache* fStrike; | 42 SkGlyphCache* fStrike; |
66 GrFontDescKey* fKey; | |
67 | 43 |
68 typedef SkNoncopyable INHERITED; | 44 typedef SkNoncopyable INHERITED; |
69 }; | 45 }; |
70 | 46 |
71 #endif | 47 #endif |
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