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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 GrDistanceFieldTextContext_DEFINED | 8 #ifndef GrDistanceFieldTextContext_DEFINED |
9 #define GrDistanceFieldTextContext_DEFINED | 9 #define GrDistanceFieldTextContext_DEFINED |
10 | 10 |
11 #include "GrTextContext.h" | 11 #include "GrTextContext.h" |
12 | 12 |
13 class GrGeometryProcessor; | 13 class GrGeometryProcessor; |
14 class GrTextStrike; | 14 class GrTextStrike; |
15 | 15 |
16 /* | 16 /* |
17 * This class implements GrTextContext using distance field fonts | 17 * This class implements GrTextContext using distance field fonts |
18 */ | 18 */ |
19 class GrDistanceFieldTextContext : public GrTextContext { | 19 class GrDistanceFieldTextContext : public GrTextContext { |
20 public: | 20 public: |
21 GrDistanceFieldTextContext(GrContext*, const SkDeviceProperties&, bool enabl
e); | 21 GrDistanceFieldTextContext(GrContext*, const SkDeviceProperties&, bool enabl
e); |
22 virtual ~GrDistanceFieldTextContext(); | 22 virtual ~GrDistanceFieldTextContext(); |
23 | 23 |
| 24 virtual bool canDraw(const SkPaint& paint) SK_OVERRIDE; |
| 25 |
24 virtual void drawText(const GrPaint&, const SkPaint&, const char text[], siz
e_t byteLength, | 26 virtual void drawText(const GrPaint&, const SkPaint&, const char text[], siz
e_t byteLength, |
25 SkScalar x, SkScalar y) SK_OVERRIDE; | 27 SkScalar x, SkScalar y) SK_OVERRIDE; |
26 virtual void drawPosText(const GrPaint&, const SkPaint&, | 28 virtual void drawPosText(const GrPaint&, const SkPaint&, |
27 const char text[], size_t byteLength, | 29 const char text[], size_t byteLength, |
28 const SkScalar pos[], int scalarsPerPosition, | 30 const SkScalar pos[], int scalarsPerPosition, |
29 const SkPoint& offset) SK_OVERRIDE; | 31 const SkPoint& offset) SK_OVERRIDE; |
30 | 32 |
31 virtual bool canDraw(const SkPaint& paint) SK_OVERRIDE; | |
32 | |
33 private: | 33 private: |
34 GrTextStrike* fStrike; | |
35 SkScalar fTextRatio; | |
36 bool fUseLCDText; | |
37 bool fEnableDFRendering; | |
38 SkAutoTUnref<GrGeometryProcessor> fCachedGeometryProcessor; | |
39 // Used to check whether fCachedEffect is still valid. | |
40 uint32_t fEffectTextureUniqueID; | |
41 SkColor fEffectColor; | |
42 uint32_t fEffectFlags; | |
43 GrTexture* fGammaTexture; | |
44 | |
45 void init(const GrPaint&, const SkPaint&); | |
46 void drawPackedGlyph(GrGlyph::PackedID, SkFixed left, SkFixed top, GrFontSca
ler*); | |
47 void flushGlyphs(); // automatically called by destructor | |
48 void setupCoverageEffect(const SkColor& filteredColor); | |
49 void finish(); | |
50 | |
51 enum { | 34 enum { |
52 kMinRequestedGlyphs = 1, | 35 kMinRequestedGlyphs = 1, |
53 kDefaultRequestedGlyphs = 64, | 36 kDefaultRequestedGlyphs = 64, |
54 kMinRequestedVerts = kMinRequestedGlyphs * 4, | 37 kMinRequestedVerts = kMinRequestedGlyphs * 4, |
55 kDefaultRequestedVerts = kDefaultRequestedGlyphs * 4, | 38 kDefaultRequestedVerts = kDefaultRequestedGlyphs * 4, |
56 }; | 39 }; |
57 | 40 |
58 void* fVertices; | 41 GrTextStrike* fStrike; |
59 int32_t fMaxVertices; | 42 SkScalar fTextRatio; |
60 GrTexture* fCurrTexture; | 43 bool fUseLCDText; |
61 int fCurrVertex; | 44 bool fEnableDFRendering; |
62 SkRect fVertexBounds; | 45 SkAutoTUnref<GrGeometryProcessor> fCachedGeometryProcessor; |
| 46 // Used to check whether fCachedEffect is still valid. |
| 47 uint32_t fEffectTextureUniqueID; |
| 48 SkColor fEffectColor; |
| 49 uint32_t fEffectFlags; |
| 50 GrTexture* fGammaTexture; |
| 51 void* fVertices; |
| 52 int32_t fMaxVertices; |
| 53 GrTexture* fCurrTexture; |
| 54 int fCurrVertex; |
| 55 SkRect fVertexBounds; |
| 56 |
| 57 void init(const GrPaint&, const SkPaint&); |
| 58 void appendGlyph(GrGlyph::PackedID, SkFixed left, SkFixed top, GrFontScaler*
); |
| 59 void setupCoverageEffect(const SkColor& filteredColor); |
| 60 void flush(); // automatically called by destructor |
| 61 void finish(); |
63 }; | 62 }; |
64 | 63 |
65 #endif | 64 #endif |
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