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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 GrTextStrike; | 13 class GrTextStrike; |
14 | 14 |
15 /* | 15 /* |
16 * This class implements GrTextContext using distance field fonts | 16 * This class implements GrTextContext using distance field fonts |
17 */ | 17 */ |
18 class GrDistanceFieldTextContext : public GrTextContext { | 18 class GrDistanceFieldTextContext : public GrTextContext { |
19 public: | 19 public: |
20 virtual void drawText(const char text[], size_t byteLength, SkScalar x, SkSc
alar y) SK_OVERRIDE; | 20 GrDistanceFieldTextContext(GrContext*, const SkDeviceProperties&); |
21 virtual void drawPosText(const char text[], size_t byteLength, | 21 virtual ~GrDistanceFieldTextContext(); |
| 22 |
| 23 virtual void drawText(const GrPaint&, const SkPaint&, const char text[], siz
e_t byteLength, |
| 24 SkScalar x, SkScalar y) SK_OVERRIDE; |
| 25 virtual void drawPosText(const GrPaint&, const SkPaint&, |
| 26 const char text[], size_t byteLength, |
22 const SkScalar pos[], SkScalar constY, | 27 const SkScalar pos[], SkScalar constY, |
23 int scalarsPerPosition) SK_OVERRIDE; | 28 int scalarsPerPosition) SK_OVERRIDE; |
24 | 29 |
25 static bool CanDraw(const SkPaint& paint, const SkMatrix& ctm); | 30 virtual bool canDraw(const SkPaint& paint) SK_OVERRIDE; |
26 | 31 |
27 private: | 32 private: |
28 GrDistanceFieldTextContext(GrContext*, const GrPaint&, const SkPaint&, | |
29 const SkDeviceProperties&); | |
30 virtual ~GrDistanceFieldTextContext(); | |
31 friend class GrTTextContextManager<GrDistanceFieldTextContext>; | |
32 | |
33 GrTextStrike* fStrike; | 33 GrTextStrike* fStrike; |
34 SkScalar fTextRatio; | 34 SkScalar fTextRatio; |
35 | 35 |
| 36 void init(const GrPaint&, const SkPaint&); |
36 void drawPackedGlyph(GrGlyph::PackedID, GrFixed left, GrFixed top, GrFontSca
ler*); | 37 void drawPackedGlyph(GrGlyph::PackedID, GrFixed left, GrFixed top, GrFontSca
ler*); |
37 void flushGlyphs(); // automatically called by destructor | 38 void flushGlyphs(); // automatically called by destructor |
| 39 void finish(); |
38 | 40 |
39 enum { | 41 enum { |
40 kMinRequestedGlyphs = 1, | 42 kMinRequestedGlyphs = 1, |
41 kDefaultRequestedGlyphs = 64, | 43 kDefaultRequestedGlyphs = 64, |
42 kMinRequestedVerts = kMinRequestedGlyphs * 4, | 44 kMinRequestedVerts = kMinRequestedGlyphs * 4, |
43 kDefaultRequestedVerts = kDefaultRequestedGlyphs * 4, | 45 kDefaultRequestedVerts = kDefaultRequestedGlyphs * 4, |
44 }; | 46 }; |
45 | 47 |
46 SkPoint* fVertices; | 48 SkPoint* fVertices; |
47 int32_t fMaxVertices; | 49 int32_t fMaxVertices; |
48 GrTexture* fCurrTexture; | 50 GrTexture* fCurrTexture; |
49 int fCurrVertex; | 51 int fCurrVertex; |
50 }; | 52 }; |
51 | 53 |
52 #endif | 54 #endif |
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