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1 /* | 1 /* |
2 * Copyright 2015 Google Inc. | 2 * Copyright 2015 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 GrAtlasTextContext_DEFINED | 8 #ifndef GrAtlasTextContext_DEFINED |
9 #define GrAtlasTextContext_DEFINED | 9 #define GrAtlasTextContext_DEFINED |
10 | 10 |
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29 * This class implements GrTextContext using standard bitmap fonts, and can also
process textblobs. | 29 * This class implements GrTextContext using standard bitmap fonts, and can also
process textblobs. |
30 */ | 30 */ |
31 class GrAtlasTextContext : public GrTextContext { | 31 class GrAtlasTextContext : public GrTextContext { |
32 public: | 32 public: |
33 static GrAtlasTextContext* Create(GrContext*, const SkSurfaceProps&); | 33 static GrAtlasTextContext* Create(GrContext*, const SkSurfaceProps&); |
34 | 34 |
35 private: | 35 private: |
36 GrAtlasTextContext(GrContext*, const SkSurfaceProps&); | 36 GrAtlasTextContext(GrContext*, const SkSurfaceProps&); |
37 ~GrAtlasTextContext() override {} | 37 ~GrAtlasTextContext() override {} |
38 | 38 |
39 bool canDraw(const GrRenderTarget*, const GrClip&, const GrPaint&, | 39 bool canDraw(const SkPaint&, const SkMatrix& viewMatrix) override; |
40 const SkPaint&, const SkMatrix& viewMatrix) override; | |
41 | 40 |
42 void onDrawText(GrDrawContext*, GrRenderTarget*, const GrClip&, const GrPain
t&, const SkPaint&, | 41 void onDrawText(GrDrawContext*, GrRenderTarget*, const GrClip&, const GrPain
t&, const SkPaint&, |
43 const SkMatrix& viewMatrix, const char text[], size_t byteLe
ngth, | 42 const SkMatrix& viewMatrix, const char text[], size_t byteLe
ngth, |
44 SkScalar x, SkScalar y, const SkIRect& regionClipBounds) ove
rride; | 43 SkScalar x, SkScalar y, const SkIRect& regionClipBounds) ove
rride; |
45 void onDrawPosText(GrDrawContext*, GrRenderTarget*, const GrClip&, const GrP
aint&, | 44 void onDrawPosText(GrDrawContext*, GrRenderTarget*, const GrClip&, const GrP
aint&, |
46 const SkPaint&, const SkMatrix& viewMatrix, | 45 const SkPaint&, const SkMatrix& viewMatrix, |
47 const char text[], size_t byteLength, | 46 const char text[], size_t byteLength, |
48 const SkScalar pos[], int scalarsPerPosition, | 47 const SkScalar pos[], int scalarsPerPosition, |
49 const SkPoint& offset, const SkIRect& regionClipBounds) o
verride; | 48 const SkPoint& offset, const SkIRect& regionClipBounds) o
verride; |
50 void drawTextBlob(GrDrawContext*, GrRenderTarget*, const GrClip&, const SkPa
int&, | 49 void drawTextBlob(GrDrawContext*, GrRenderTarget*, const GrClip&, const SkPa
int&, |
51 const SkMatrix& viewMatrix, const SkTextBlob*, SkScalar x,
SkScalar y, | 50 const SkMatrix& viewMatrix, const SkTextBlob*, SkScalar x,
SkScalar y, |
52 SkDrawFilter*, const SkIRect& clipBounds) override; | 51 SkDrawFilter*, const SkIRect& clipBounds) override; |
53 | 52 |
54 typedef GrAtlasTextBlob::Run Run; | 53 typedef GrAtlasTextBlob::Run Run; |
55 typedef Run::SubRunInfo PerSubRunInfo; | 54 typedef Run::SubRunInfo PerSubRunInfo; |
56 | 55 |
57 inline bool canDrawAsDistanceFields(const SkPaint&, const SkMatrix& viewMatr
ix); | 56 inline bool canDrawAsDistanceFields(const SkPaint&, const SkMatrix& viewMatr
ix); |
58 GrAtlasTextBlob* setupDFBlob(int glyphCount, const SkPaint& origPaint, | 57 GrAtlasTextBlob* setupDFBlob(int glyphCount, const SkPaint& origPaint, |
59 const SkMatrix& viewMatrix, SkPaint* dfPaint, | 58 const SkMatrix& viewMatrix, SkPaint* dfPaint, |
60 SkScalar* textRatio); | 59 SkScalar* textRatio); |
61 void bmpAppendGlyph(GrAtlasTextBlob*, int runIndex, const SkGlyph&, int left
, int top, | 60 void bmpAppendGlyph(GrAtlasTextBlob*, int runIndex, const SkGlyph&, int left
, int top, |
62 GrColor color, GrFontScaler*, const SkIRect& clipRect); | 61 GrColor color, GrFontScaler*); |
63 bool dfAppendGlyph(GrAtlasTextBlob*, int runIndex, const SkGlyph&, SkScalar
sx, SkScalar sy, | 62 bool dfAppendGlyph(GrAtlasTextBlob*, int runIndex, const SkGlyph&, SkScalar
sx, SkScalar sy, |
64 GrColor color, GrFontScaler*, const SkIRect& clipRect, Sk
Scalar textRatio, | 63 GrColor color, GrFontScaler*, SkScalar textRatio, |
65 const SkMatrix& viewMatrix); | 64 const SkMatrix& viewMatrix); |
66 inline void appendGlyphPath(GrAtlasTextBlob*, GrGlyph*, GrFontScaler*, const
SkGlyph&, | 65 inline void appendGlyphPath(GrAtlasTextBlob*, GrGlyph*, GrFontScaler*, const
SkGlyph&, |
67 SkScalar x, SkScalar y, SkScalar scale = 1.0f, | 66 SkScalar x, SkScalar y, SkScalar scale = 1.0f, |
68 bool applyVM = false); | 67 bool applyVM = false); |
69 inline void appendGlyphCommon(GrAtlasTextBlob*, Run*, Run::SubRunInfo*, | 68 inline void appendGlyphCommon(GrAtlasTextBlob*, Run*, Run::SubRunInfo*, |
70 const SkRect& positions, GrColor color, | 69 const SkRect& positions, GrColor color, |
71 size_t vertexStride, bool useVertexColor, | 70 size_t vertexStride, bool useVertexColor, |
72 GrGlyph*); | 71 GrGlyph*); |
73 | 72 |
74 inline void flushRunAsPaths(GrDrawContext*, | 73 inline void flushRunAsPaths(GrDrawContext*, |
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89 // We have to flush SkTextBlobs differently from drawText / drawPosText | 88 // We have to flush SkTextBlobs differently from drawText / drawPosText |
90 void flush(const SkTextBlob*, GrAtlasTextBlob*, GrDrawContext*, GrRenderTarg
et*, | 89 void flush(const SkTextBlob*, GrAtlasTextBlob*, GrDrawContext*, GrRenderTarg
et*, |
91 const SkPaint&, const GrPaint&, SkDrawFilter*, const GrClip&, | 90 const SkPaint&, const GrPaint&, SkDrawFilter*, const GrClip&, |
92 const SkMatrix& viewMatrix, const SkIRect& clipBounds, SkScalar x
, SkScalar y, | 91 const SkMatrix& viewMatrix, const SkIRect& clipBounds, SkScalar x
, SkScalar y, |
93 SkScalar transX, SkScalar transY); | 92 SkScalar transX, SkScalar transY); |
94 void flush(GrAtlasTextBlob*, GrDrawContext*, GrRenderTarget*, const SkPaint&
, | 93 void flush(GrAtlasTextBlob*, GrDrawContext*, GrRenderTarget*, const SkPaint&
, |
95 const GrPaint&, const GrClip&, const SkIRect& clipBounds); | 94 const GrPaint&, const GrClip&, const SkIRect& clipBounds); |
96 | 95 |
97 // A helper for drawing BitmapText in a run of distance fields | 96 // A helper for drawing BitmapText in a run of distance fields |
98 inline void fallbackDrawPosText(GrAtlasTextBlob*, int runIndex, | 97 inline void fallbackDrawPosText(GrAtlasTextBlob*, int runIndex, |
99 GrRenderTarget*, const GrClip&, GrColor colo
r, | 98 const GrClip&, GrColor color, |
100 const SkPaint&, const SkMatrix& viewMatrix, | 99 const SkPaint&, const SkMatrix& viewMatrix, |
101 const SkTDArray<char>& fallbackTxt, | 100 const SkTDArray<char>& fallbackTxt, |
102 const SkTDArray<SkScalar>& fallbackPos, | 101 const SkTDArray<SkScalar>& fallbackPos, |
103 int scalarsPerPosition, | 102 int scalarsPerPosition, |
104 const SkPoint& offset, | 103 const SkPoint& offset); |
105 const SkIRect& clipRect); | |
106 | 104 |
107 void internalDrawBMPText(GrAtlasTextBlob*, int runIndex, SkGlyphCache*, cons
t SkPaint&, | 105 void internalDrawBMPText(GrAtlasTextBlob*, int runIndex, SkGlyphCache*, cons
t SkPaint&, |
108 GrColor color, const SkMatrix& viewMatrix, | 106 GrColor color, const SkMatrix& viewMatrix, |
109 const char text[], size_t byteLength, | 107 const char text[], size_t byteLength, |
110 SkScalar x, SkScalar y, const SkIRect& clipRect); | 108 SkScalar x, SkScalar y); |
111 void internalDrawBMPPosText(GrAtlasTextBlob*, int runIndex, SkGlyphCache*, c
onst SkPaint&, | 109 void internalDrawBMPPosText(GrAtlasTextBlob*, int runIndex, SkGlyphCache*, c
onst SkPaint&, |
112 GrColor color, const SkMatrix& viewMatrix, | 110 GrColor color, const SkMatrix& viewMatrix, |
113 const char text[], size_t byteLength, | 111 const char text[], size_t byteLength, |
114 const SkScalar pos[], int scalarsPerPosition, | 112 const SkScalar pos[], int scalarsPerPosition, |
115 const SkPoint& offset, const SkIRect& clipRect); | 113 const SkPoint& offset); |
116 | 114 |
117 void internalDrawDFText(GrAtlasTextBlob*, int runIndex, const SkPaint&, | 115 void internalDrawDFText(GrAtlasTextBlob*, int runIndex, const SkPaint&, |
118 GrColor color, const SkMatrix& viewMatrix, | 116 GrColor color, const SkMatrix& viewMatrix, |
119 const char text[], size_t byteLength, | 117 const char text[], size_t byteLength, |
120 SkScalar x, SkScalar y, const SkIRect& clipRect, | 118 SkScalar x, SkScalar y, |
121 SkScalar textRatio, | 119 SkScalar textRatio, |
122 SkTDArray<char>* fallbackTxt, | 120 SkTDArray<char>* fallbackTxt, |
123 SkTDArray<SkScalar>* fallbackPos, | 121 SkTDArray<SkScalar>* fallbackPos, |
124 SkPoint* offset, const SkPaint& origPaint); | 122 SkPoint* offset, const SkPaint& origPaint); |
125 void internalDrawDFPosText(GrAtlasTextBlob*, int runIndex, const SkPaint&, | 123 void internalDrawDFPosText(GrAtlasTextBlob*, int runIndex, const SkPaint&, |
126 GrColor color, const SkMatrix& viewMatrix, | 124 GrColor color, const SkMatrix& viewMatrix, |
127 const char text[], size_t byteLength, | 125 const char text[], size_t byteLength, |
128 const SkScalar pos[], int scalarsPerPosition, | 126 const SkScalar pos[], int scalarsPerPosition, |
129 const SkPoint& offset, const SkIRect& clipRect, | 127 const SkPoint& offset, |
130 SkScalar textRatio, | 128 SkScalar textRatio, |
131 SkTDArray<char>* fallbackTxt, | 129 SkTDArray<char>* fallbackTxt, |
132 SkTDArray<SkScalar>* fallbackPos); | 130 SkTDArray<SkScalar>* fallbackPos); |
133 | 131 |
134 // sets up the descriptor on the blob and returns a detached cache. Client
must attach | 132 // sets up the descriptor on the blob and returns a detached cache. Client
must attach |
135 inline static GrColor ComputeCanonicalColor(const SkPaint&, bool lcd); | 133 inline static GrColor ComputeCanonicalColor(const SkPaint&, bool lcd); |
136 inline SkGlyphCache* setupCache(Run*, const SkPaint&, const SkMatrix* viewMa
trix, bool noGamma); | 134 inline SkGlyphCache* setupCache(Run*, const SkPaint&, const SkMatrix* viewMa
trix, bool noGamma); |
137 static inline bool MustRegenerateBlob(SkScalar* outTransX, SkScalar* outTran
sY, | 135 static inline bool MustRegenerateBlob(SkScalar* outTransX, SkScalar* outTran
sY, |
138 const GrAtlasTextBlob&, const SkPaint&
, GrColor, | 136 const GrAtlasTextBlob&, const SkPaint&
, GrColor, |
139 const SkMaskFilter::BlurRec&, | 137 const SkMaskFilter::BlurRec&, |
140 const SkMatrix& viewMatrix, SkScalar x
, SkScalar y); | 138 const SkMatrix& viewMatrix, SkScalar x
, SkScalar y); |
141 void regenerateTextBlob(GrAtlasTextBlob* bmp, const SkPaint& skPaint, GrColo
r, | 139 void regenerateTextBlob(GrAtlasTextBlob* bmp, const SkPaint& skPaint, GrColo
r, |
142 const SkMatrix& viewMatrix, | 140 const SkMatrix& viewMatrix, |
143 const SkTextBlob* blob, SkScalar x, SkScalar y, | 141 const SkTextBlob* blob, SkScalar x, SkScalar y, |
144 SkDrawFilter* drawFilter, const SkIRect& clipRect, G
rRenderTarget*, | 142 SkDrawFilter* drawFilter, |
145 const GrClip&); | 143 const GrClip&); |
146 inline static bool HasLCD(const SkTextBlob*); | 144 inline static bool HasLCD(const SkTextBlob*); |
147 inline void initDistanceFieldPaint(GrAtlasTextBlob*, SkPaint*, SkScalar* tex
tRatio, | 145 inline void initDistanceFieldPaint(GrAtlasTextBlob*, SkPaint*, SkScalar* tex
tRatio, |
148 const SkMatrix&); | 146 const SkMatrix&); |
149 | 147 |
150 // Test methods | 148 // Test methods |
151 // TODO this is really ugly. It'd be much nicer if positioning could be mov
ed to batch | 149 // TODO this is really ugly. It'd be much nicer if positioning could be mov
ed to batch |
152 inline GrAtlasTextBlob* createDrawTextBlob(GrRenderTarget*, const GrClip&, c
onst GrPaint&, | 150 inline GrAtlasTextBlob* createDrawTextBlob(const GrClip&, const GrPaint&, |
153 const SkPaint&, const SkMatrix& vi
ewMatrix, | 151 const SkPaint&, const SkMatrix& v
iewMatrix, |
154 const char text[], size_t byteLeng
th, | 152 const char text[], size_t byteLen
gth, |
155 SkScalar x, SkScalar y, | 153 SkScalar x, SkScalar y, |
156 const SkIRect& regionClipBounds); | 154 const SkIRect& regionClipBounds); |
157 inline GrAtlasTextBlob* createDrawPosTextBlob(GrRenderTarget*, const GrClip&
, const GrPaint&, | 155 inline GrAtlasTextBlob* createDrawPosTextBlob(const GrClip&, const GrPaint&, |
158 const SkPaint&, const SkMatrix&
viewMatrix, | 156 const SkPaint&, const SkMatrix
& viewMatrix, |
159 const char text[], size_t byteL
ength, | 157 const char text[], size_t byte
Length, |
160 const SkScalar pos[], int scala
rsPerPosition, | 158 const SkScalar pos[], int scal
arsPerPosition, |
161 const SkPoint& offset, | 159 const SkPoint& offset, |
162 const SkIRect& regionClipBounds
); | 160 const SkIRect& regionClipBound
s); |
163 | 161 |
164 // Distance field text needs this table to compute a value for use in the fr
agment shader. | 162 // Distance field text needs this table to compute a value for use in the fr
agment shader. |
165 // Because the GrAtlasTextContext can go out of scope before the final flush
, this needs to be | 163 // Because the GrAtlasTextContext can go out of scope before the final flush
, this needs to be |
166 // refcnted and malloced | 164 // refcnted and malloced |
167 struct DistanceAdjustTable : public SkNVRefCnt<DistanceAdjustTable> { | 165 struct DistanceAdjustTable : public SkNVRefCnt<DistanceAdjustTable> { |
168 DistanceAdjustTable() { this->buildDistanceAdjustTable(); } | 166 DistanceAdjustTable() { this->buildDistanceAdjustTable(); } |
169 ~DistanceAdjustTable() { delete[] fTable; } | 167 ~DistanceAdjustTable() { delete[] fTable; } |
170 | 168 |
171 const SkScalar& operator[] (int i) const { | 169 const SkScalar& operator[] (int i) const { |
172 return fTable[i]; | 170 return fTable[i]; |
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186 friend class GrAtlasTextBatch; | 184 friend class GrAtlasTextBatch; |
187 | 185 |
188 #ifdef GR_TEST_UTILS | 186 #ifdef GR_TEST_UTILS |
189 DRAW_BATCH_TEST_FRIEND(TextBlobBatch); | 187 DRAW_BATCH_TEST_FRIEND(TextBlobBatch); |
190 #endif | 188 #endif |
191 | 189 |
192 typedef GrTextContext INHERITED; | 190 typedef GrTextContext INHERITED; |
193 }; | 191 }; |
194 | 192 |
195 #endif | 193 #endif |
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