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| 1 /* | |
| 2 * Copyright 2013 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 GrDistanceFieldTextContext_DEFINED | |
| 9 #define GrDistanceFieldTextContext_DEFINED | |
| 10 | |
| 11 #include "GrTextContext.h" | |
| 12 | |
| 13 class GrGeometryProcessor; | |
| 14 class GrTextStrike; | |
| 15 | |
| 16 /* | |
| 17 * This class implements GrTextContext using distance field fonts | |
| 18 */ | |
| 19 class GrDistanceFieldTextContext : public GrTextContext { | |
| 20 public: | |
| 21 static GrDistanceFieldTextContext* Create(GrContext*, SkGpuDevice*, const Sk
DeviceProperties&, | |
| 22 bool enable); | |
| 23 | |
| 24 virtual ~GrDistanceFieldTextContext(); | |
| 25 | |
| 26 private: | |
| 27 enum { | |
| 28 kMinRequestedGlyphs = 1, | |
| 29 kDefaultRequestedGlyphs = 64, | |
| 30 kMinRequestedVerts = kMinRequestedGlyphs * 4, | |
| 31 kDefaultRequestedVerts = kDefaultRequestedGlyphs * 4, | |
| 32 }; | |
| 33 | |
| 34 GrTextStrike* fStrike; | |
| 35 SkScalar fTextRatio; | |
| 36 bool fUseLCDText; | |
| 37 bool fEnableDFRendering; | |
| 38 SkAutoTUnref<GrGeometryProcessor> fCachedGeometryProcessor; | |
| 39 SkScalar* fDistanceAdjustTable; | |
| 40 // Used to check whether fCachedEffect is still valid. | |
| 41 uint32_t fEffectTextureUniqueID; | |
| 42 SkColor fEffectColor; | |
| 43 uint32_t fEffectFlags; | |
| 44 void* fVertices; | |
| 45 int fCurrVertex; | |
| 46 int fAllocVertexCount; | |
| 47 int fTotalVertexCount; | |
| 48 GrTexture* fCurrTexture; | |
| 49 SkRect fVertexBounds; | |
| 50 SkMatrix fViewMatrix; | |
| 51 | |
| 52 GrDistanceFieldTextContext(GrContext*, SkGpuDevice*, const SkDevicePropertie
s&, bool enable); | |
| 53 void buildDistanceAdjustTable(); | |
| 54 | |
| 55 bool canDraw(const GrRenderTarget*, const GrClip&, const GrPaint&, | |
| 56 const SkPaint&, const SkMatrix& viewMatrix) override; | |
| 57 | |
| 58 void onDrawText(GrRenderTarget*, const GrClip&, const GrPaint&, const SkPain
t&, | |
| 59 const SkMatrix& viewMatrix, | |
| 60 const char text[], size_t byteLength, | |
| 61 SkScalar x, SkScalar y, const SkIRect& regionClipBounds) ove
rride; | |
| 62 void onDrawPosText(GrRenderTarget*, const GrClip&, const GrPaint&, const SkP
aint&, | |
| 63 const SkMatrix& viewMatrix, | |
| 64 const char text[], size_t byteLength, | |
| 65 const SkScalar pos[], int scalarsPerPosition, | |
| 66 const SkPoint& offset, const SkIRect& regionClipBounds) o
verride; | |
| 67 | |
| 68 void init(GrRenderTarget*, const GrClip&, const GrPaint&, const SkPaint&, | |
| 69 const SkIRect& regionClipBounds); | |
| 70 bool appendGlyph(GrGlyph::PackedID, SkScalar left, SkScalar top, GrFontScale
r*); | |
| 71 bool uploadGlyph(GrGlyph*, GrFontScaler*); | |
| 72 void setupCoverageEffect(const SkColor& filteredColor); | |
| 73 void flush(); // automatically called by destructor | |
| 74 void finish(); | |
| 75 }; | |
| 76 | |
| 77 #endif | |
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Chromium Code Reviews
Issue 1104343003:
remove old text contexts and fontcache (Closed)
Base URL: https://skia.googlesource.com/skia.git@master