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Side by Side Diff: src/gpu/GrDistanceFieldTextContext.h

Issue 1015173002: Let text contexts fall back directly to paths (Closed) Base URL: https://skia.googlesource.com/skia.git@text-blob-to-context
Patch Set: move createTextContext to private Created 5 years, 9 months ago
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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 static GrDistanceFieldTextContext* Create(GrContext*, const SkDeviceProperti es&, bool enable); 21 static GrDistanceFieldTextContext* Create(GrContext*, SkGpuDevice*, const Sk DeviceProperties&,
22 bool enable);
22 23
23 virtual ~GrDistanceFieldTextContext(); 24 virtual ~GrDistanceFieldTextContext();
24 25
25 private: 26 private:
26 enum { 27 enum {
27 kMinRequestedGlyphs = 1, 28 kMinRequestedGlyphs = 1,
28 kDefaultRequestedGlyphs = 64, 29 kDefaultRequestedGlyphs = 64,
29 kMinRequestedVerts = kMinRequestedGlyphs * 4, 30 kMinRequestedVerts = kMinRequestedGlyphs * 4,
30 kDefaultRequestedVerts = kDefaultRequestedGlyphs * 4, 31 kDefaultRequestedVerts = kDefaultRequestedGlyphs * 4,
31 }; 32 };
32 33
33 GrTextStrike* fStrike; 34 GrTextStrike* fStrike;
34 SkScalar fTextRatio; 35 SkScalar fTextRatio;
35 bool fUseLCDText; 36 bool fUseLCDText;
36 bool fEnableDFRendering; 37 bool fEnableDFRendering;
37 SkAutoTUnref<GrGeometryProcessor> fCachedGeometryProcessor; 38 SkAutoTUnref<GrGeometryProcessor> fCachedGeometryProcessor;
38 // Used to check whether fCachedEffect is still valid. 39 // Used to check whether fCachedEffect is still valid.
39 uint32_t fEffectTextureUniqueID; 40 uint32_t fEffectTextureUniqueID;
40 SkColor fEffectColor; 41 SkColor fEffectColor;
41 uint32_t fEffectFlags; 42 uint32_t fEffectFlags;
42 GrTexture* fGammaTexture; 43 GrTexture* fGammaTexture;
43 void* fVertices; 44 void* fVertices;
44 int fCurrVertex; 45 int fCurrVertex;
45 int fAllocVertexCount; 46 int fAllocVertexCount;
46 int fTotalVertexCount; 47 int fTotalVertexCount;
47 GrTexture* fCurrTexture; 48 GrTexture* fCurrTexture;
48 SkRect fVertexBounds; 49 SkRect fVertexBounds;
49 SkMatrix fViewMatrix; 50 SkMatrix fViewMatrix;
50 51
51 GrDistanceFieldTextContext(GrContext*, const SkDeviceProperties&, bool enabl e); 52 GrDistanceFieldTextContext(GrContext*, SkGpuDevice*, const SkDevicePropertie s&, bool enable);
52 53
53 bool canDraw(const SkPaint& paint, const SkMatrix& viewMatrix) SK_OVERRIDE; 54 bool canDraw(const SkPaint& paint, const SkMatrix& viewMatrix) SK_OVERRIDE;
54 55
55 virtual void onDrawText(GrRenderTarget*, const GrClip&, const GrPaint&, cons t SkPaint&, 56 virtual void onDrawText(GrRenderTarget*, const GrClip&, const GrPaint&, cons t SkPaint&,
56 const SkMatrix& viewMatrix, 57 const SkMatrix& viewMatrix,
57 const char text[], size_t byteLength, 58 const char text[], size_t byteLength,
58 SkScalar x, SkScalar y) SK_OVERRIDE; 59 SkScalar x, SkScalar y, const SkIRect& regionClipBou nds) SK_OVERRIDE;
59 virtual void onDrawPosText(GrRenderTarget*, const GrClip&, const GrPaint&, c onst SkPaint&, 60 virtual void onDrawPosText(GrRenderTarget*, const GrClip&, const GrPaint&, c onst SkPaint&,
60 const SkMatrix& viewMatrix, 61 const SkMatrix& viewMatrix,
61 const char text[], size_t byteLength, 62 const char text[], size_t byteLength,
62 const SkScalar pos[], int scalarsPerPosition, 63 const SkScalar pos[], int scalarsPerPosition,
63 const SkPoint& offset) SK_OVERRIDE; 64 const SkPoint& offset, const SkIRect& regionClipB ounds) SK_OVERRIDE;
64 65
65 void init(GrRenderTarget*, const GrClip&, const GrPaint&, const SkPaint&); 66 void init(GrRenderTarget*, const GrClip&, const GrPaint&, const SkPaint&,
67 const SkIRect& regionClipBounds);
66 bool appendGlyph(GrGlyph::PackedID, SkScalar left, SkScalar top, GrFontScale r*); 68 bool appendGlyph(GrGlyph::PackedID, SkScalar left, SkScalar top, GrFontScale r*);
67 bool uploadGlyph(GrGlyph*, GrFontScaler*); 69 bool uploadGlyph(GrGlyph*, GrFontScaler*);
68 void setupCoverageEffect(const SkColor& filteredColor); 70 void setupCoverageEffect(const SkColor& filteredColor);
69 void flush(); // automatically called by destructor 71 void flush(); // automatically called by destructor
70 void finish(); 72 void finish();
71 }; 73 };
72 74
73 #endif 75 #endif
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