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1 /* | |
2 * Copyright 2010 Google Inc. | |
3 * | |
4 * Use of this source code is governed by a BSD-style license that can be | |
5 * found in the LICENSE file. | |
6 */ | |
7 | |
8 #ifndef GrFontScaler_DEFINED | |
9 #define GrFontScaler_DEFINED | |
10 | |
11 #include "GrGlyph.h" | |
12 #include "GrTypes.h" | |
13 | |
14 #include "SkDescriptor.h" | |
15 | |
16 class SkGlyph; | |
17 class SkPath; | |
18 | |
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()->equals(*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. | |
42 * | |
43 * The client is responsible for instantiating this. The instance is created | |
44 * for a specific font+size+matrix. | |
45 */ | |
46 class GrFontScaler : public SkRefCnt { | |
47 public: | |
48 explicit GrFontScaler(SkGlyphCache* strike); | |
49 virtual ~GrFontScaler(); | |
50 | |
51 const GrFontDescKey* getKey(); | |
52 GrMaskFormat getMaskFormat() const; | |
53 GrMaskFormat getPackedGlyphMaskFormat(const SkGlyph&) const; | |
54 bool getPackedGlyphBounds(const SkGlyph&, SkIRect* bounds); | |
55 bool getPackedGlyphImage(const SkGlyph&, int width, int height, int rowBytes
, | |
56 GrMaskFormat expectedMaskFormat, void* image); | |
57 bool getPackedGlyphDFBounds(const SkGlyph&, SkIRect* bounds); | |
58 bool getPackedGlyphDFImage(const SkGlyph&, int width, int height, void* imag
e); | |
59 const SkPath* getGlyphPath(const SkGlyph&); | |
60 const SkGlyph& grToSkGlyph(GrGlyph::PackedID); | |
61 | |
62 private: | |
63 SkGlyphCache* fStrike; | |
64 GrFontDescKey* fKey; | |
65 | |
66 typedef SkRefCnt INHERITED; | |
67 }; | |
68 | |
69 #endif | |
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