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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 GrTextStrike; | 14 class GrTextStrike; |
14 | 15 |
15 /* | 16 /* |
16 * This class implements GrTextContext using distance field fonts | 17 * This class implements GrTextContext using distance field fonts |
17 */ | 18 */ |
18 class GrDistanceFieldTextContext : public GrTextContext { | 19 class GrDistanceFieldTextContext : public GrTextContext { |
19 public: | 20 public: |
20 GrDistanceFieldTextContext(GrContext*, const SkDeviceProperties&, bool enabl
e); | 21 GrDistanceFieldTextContext(GrContext*, const SkDeviceProperties&, bool enabl
e); |
21 virtual ~GrDistanceFieldTextContext(); | 22 virtual ~GrDistanceFieldTextContext(); |
22 | 23 |
23 virtual void drawText(const GrPaint&, const SkPaint&, const char text[], siz
e_t byteLength, | 24 virtual void drawText(const GrPaint&, const SkPaint&, const char text[], siz
e_t byteLength, |
24 SkScalar x, SkScalar y) SK_OVERRIDE; | 25 SkScalar x, SkScalar y) SK_OVERRIDE; |
25 virtual void drawPosText(const GrPaint&, const SkPaint&, | 26 virtual void drawPosText(const GrPaint&, const SkPaint&, |
26 const char text[], size_t byteLength, | 27 const char text[], size_t byteLength, |
27 const SkScalar pos[], SkScalar constY, | 28 const SkScalar pos[], SkScalar constY, |
28 int scalarsPerPosition) SK_OVERRIDE; | 29 int scalarsPerPosition) SK_OVERRIDE; |
29 | 30 |
30 virtual bool canDraw(const SkPaint& paint) SK_OVERRIDE; | 31 virtual bool canDraw(const SkPaint& paint) SK_OVERRIDE; |
31 | 32 |
32 private: | 33 private: |
33 GrTextStrike* fStrike; | 34 GrTextStrike* fStrike; |
34 SkMatrix fTextMatrix; | 35 SkMatrix fTextMatrix; |
35 SkScalar fTextRatio; | 36 SkScalar fTextRatio; |
36 bool fUseLCDText; | 37 bool fUseLCDText; |
37 bool fEnableDFRendering; | 38 bool fEnableDFRendering; |
38 SkAutoTUnref<GrEffect> fCachedEffect; | 39 SkAutoTUnref<GrGeometryProcessor> fCachedGeometryProcessor; |
39 // Used to check whether fCachedEffect is still valid. | 40 // Used to check whether fCachedEffect is still valid. |
40 uint32_t fEffectTextureUniqueID; | 41 uint32_t fEffectTextureUniqueID; |
41 SkColor fEffectColor; | 42 SkColor fEffectColor; |
42 uint32_t fEffectFlags; | 43 uint32_t fEffectFlags; |
43 GrTexture* fGammaTexture; | 44 GrTexture* fGammaTexture; |
44 | 45 |
45 void init(const GrPaint&, const SkPaint&); | 46 void init(const GrPaint&, const SkPaint&); |
46 void drawPackedGlyph(GrGlyph::PackedID, SkFixed left, SkFixed top, GrFontSca
ler*); | 47 void drawPackedGlyph(GrGlyph::PackedID, SkFixed left, SkFixed top, GrFontSca
ler*); |
47 void flushGlyphs(); // automatically called by destructor | 48 void flushGlyphs(); // automatically called by destructor |
48 void setupCoverageEffect(const SkColor& filteredColor); | 49 void setupCoverageEffect(const SkColor& filteredColor); |
49 void finish(); | 50 void finish(); |
50 | 51 |
51 enum { | 52 enum { |
52 kMinRequestedGlyphs = 1, | 53 kMinRequestedGlyphs = 1, |
53 kDefaultRequestedGlyphs = 64, | 54 kDefaultRequestedGlyphs = 64, |
54 kMinRequestedVerts = kMinRequestedGlyphs * 4, | 55 kMinRequestedVerts = kMinRequestedGlyphs * 4, |
55 kDefaultRequestedVerts = kDefaultRequestedGlyphs * 4, | 56 kDefaultRequestedVerts = kDefaultRequestedGlyphs * 4, |
56 }; | 57 }; |
57 | 58 |
58 void* fVertices; | 59 void* fVertices; |
59 int32_t fMaxVertices; | 60 int32_t fMaxVertices; |
60 GrTexture* fCurrTexture; | 61 GrTexture* fCurrTexture; |
61 int fCurrVertex; | 62 int fCurrVertex; |
62 SkRect fVertexBounds; | 63 SkRect fVertexBounds; |
63 }; | 64 }; |
64 | 65 |
65 #endif | 66 #endif |
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