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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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21 class GrBatchTextStrike; | 21 class GrBatchTextStrike; |
22 class GrPipelineBuilder; | 22 class GrPipelineBuilder; |
23 class GrTextBlobCache; | 23 class GrTextBlobCache; |
24 | 24 |
25 /* | 25 /* |
26 * This class implements GrTextContext using standard bitmap fonts, and can also
process textblobs. | 26 * This class implements GrTextContext using standard bitmap fonts, and can also
process textblobs. |
27 * TODO replace GrBitmapTextContext | 27 * TODO replace GrBitmapTextContext |
28 */ | 28 */ |
29 class GrAtlasTextContext : public GrTextContext { | 29 class GrAtlasTextContext : public GrTextContext { |
30 public: | 30 public: |
31 static GrAtlasTextContext* Create(GrContext*, SkGpuDevice*, const SkDevicePr
operties&); | 31 static GrAtlasTextContext* Create(GrContext*, SkGpuDevice*, const SkDevicePr
operties&, |
| 32 bool enableDistanceFields); |
32 | 33 |
33 private: | 34 private: |
34 GrAtlasTextContext(GrContext*, SkGpuDevice*, const SkDeviceProperties&); | 35 GrAtlasTextContext(GrContext*, SkGpuDevice*, const SkDeviceProperties&, |
| 36 bool enableDistanceFields); |
| 37 ~GrAtlasTextContext() override {} |
35 | 38 |
36 bool canDraw(const GrRenderTarget*, const GrClip&, const GrPaint&, | 39 bool canDraw(const GrRenderTarget*, const GrClip&, const GrPaint&, |
37 const SkPaint&, const SkMatrix& viewMatrix) override; | 40 const SkPaint&, const SkMatrix& viewMatrix) override; |
38 | 41 |
39 void onDrawText(GrRenderTarget*, const GrClip&, const GrPaint&, const SkPain
t&, | 42 void onDrawText(GrRenderTarget*, const GrClip&, const GrPaint&, const SkPain
t&, |
40 const SkMatrix& viewMatrix, const char text[], size_t byteLe
ngth, | 43 const SkMatrix& viewMatrix, const char text[], size_t byteLe
ngth, |
41 SkScalar x, SkScalar y, const SkIRect& regionClipBounds) ove
rride; | 44 SkScalar x, SkScalar y, const SkIRect& regionClipBounds) ove
rride; |
42 void onDrawPosText(GrRenderTarget*, const GrClip&, const GrPaint&, const SkP
aint&, | 45 void onDrawPosText(GrRenderTarget*, const GrClip&, const GrPaint&, const SkP
aint&, |
43 const SkMatrix& viewMatrix, | 46 const SkMatrix& viewMatrix, |
44 const char text[], size_t byteLength, | 47 const char text[], size_t byteLength, |
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91 , fInitialized(false) | 94 , fInitialized(false) |
92 , fDrawAsPaths(false) { | 95 , fDrawAsPaths(false) { |
93 fVertexBounds.setLargestInverted(); | 96 fVertexBounds.setLargestInverted(); |
94 } | 97 } |
95 struct SubRunInfo { | 98 struct SubRunInfo { |
96 SubRunInfo() | 99 SubRunInfo() |
97 : fAtlasGeneration(GrBatchAtlas::kInvalidAtlasGeneration) | 100 : fAtlasGeneration(GrBatchAtlas::kInvalidAtlasGeneration) |
98 , fGlyphStartIndex(0) | 101 , fGlyphStartIndex(0) |
99 , fGlyphEndIndex(0) | 102 , fGlyphEndIndex(0) |
100 , fVertexStartIndex(0) | 103 , fVertexStartIndex(0) |
101 , fVertexEndIndex(0) {} | 104 , fVertexEndIndex(0) |
| 105 , fDrawAsDistanceFields(false) {} |
102 GrMaskFormat fMaskFormat; | 106 GrMaskFormat fMaskFormat; |
103 uint64_t fAtlasGeneration; | 107 uint64_t fAtlasGeneration; |
104 uint32_t fGlyphStartIndex; | 108 uint32_t fGlyphStartIndex; |
105 uint32_t fGlyphEndIndex; | 109 uint32_t fGlyphEndIndex; |
106 size_t fVertexStartIndex; | 110 size_t fVertexStartIndex; |
107 size_t fVertexEndIndex; | 111 size_t fVertexEndIndex; |
108 GrBatchAtlas::BulkUseTokenUpdater fBulkUseToken; | 112 GrBatchAtlas::BulkUseTokenUpdater fBulkUseToken; |
| 113 |
| 114 // distance field properties |
| 115 bool fDrawAsDistanceFields; |
| 116 bool fUseLCDText; |
109 }; | 117 }; |
110 | 118 |
111 class SubRunInfoArray { | 119 class SubRunInfoArray { |
112 public: | 120 public: |
113 SubRunInfoArray() | 121 SubRunInfoArray() |
114 : fSubRunCount(0) | 122 : fSubRunCount(0) |
115 , fSubRunAllocation(kMinSubRuns) { | 123 , fSubRunAllocation(kMinSubRuns) { |
116 fPtr = reinterpret_cast<SubRunInfo*>(fSubRunStorage.get()); | 124 fPtr = reinterpret_cast<SubRunInfo*>(fSubRunStorage.get()); |
117 this->push_back(); | 125 this->push_back(); |
118 } | 126 } |
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220 | 228 |
221 void* operator new(size_t, void* p) { return p; } | 229 void* operator new(size_t, void* p) { return p; } |
222 void operator delete(void* target, void* placement) { | 230 void operator delete(void* target, void* placement) { |
223 ::operator delete(target, placement); | 231 ::operator delete(target, placement); |
224 } | 232 } |
225 }; | 233 }; |
226 | 234 |
227 typedef BitmapTextBlob::Run Run; | 235 typedef BitmapTextBlob::Run Run; |
228 typedef Run::SubRunInfo PerSubRunInfo; | 236 typedef Run::SubRunInfo PerSubRunInfo; |
229 | 237 |
230 void appendGlyph(BitmapTextBlob*, int runIndex, GrGlyph::PackedID, int left,
int top, | 238 inline bool canDrawAsDistanceFields(const SkPaint&, const SkMatrix& viewMatr
ix); |
231 GrColor color, GrFontScaler*, const SkIRect& clipRect); | 239 BitmapTextBlob* setupDFBlob(int glyphCount, const SkPaint& origPaint, |
| 240 const SkMatrix& viewMatrix, SkGlyphCache** cache
, |
| 241 SkPaint* dfPaint, SkScalar* textRatio); |
| 242 void bmpAppendGlyph(BitmapTextBlob*, int runIndex, GrGlyph::PackedID, int le
ft, int top, |
| 243 GrColor color, GrFontScaler*, const SkIRect& clipRect); |
| 244 bool dfAppendGlyph(BitmapTextBlob*, int runIndex, GrGlyph::PackedID, SkScala
r sx, SkScalar sy, |
| 245 GrColor color, GrFontScaler*, const SkIRect& clipRect, Sk
Scalar textRatio, |
| 246 const SkMatrix& viewMatrix); |
| 247 inline void appendGlyphPath(BitmapTextBlob* blob, GrGlyph* glyph, |
| 248 GrFontScaler* scaler, int x, int y); |
| 249 inline void appendGlyphCommon(BitmapTextBlob*, Run*, Run::SubRunInfo*, |
| 250 const SkRect& positions, GrColor color, |
| 251 size_t vertexStride, bool useVertexColor, |
| 252 GrGlyph::PackedID); |
232 | 253 |
233 inline void flushRunAsPaths(const SkTextBlob::RunIterator&, const SkPaint&,
SkDrawFilter*, | 254 inline void flushRunAsPaths(const SkTextBlob::RunIterator&, const SkPaint&,
SkDrawFilter*, |
234 const SkMatrix& viewMatrix, const SkIRect& clipB
ounds, SkScalar x, | 255 const SkMatrix& viewMatrix, const SkIRect& clipB
ounds, SkScalar x, |
235 SkScalar y); | 256 SkScalar y); |
236 inline void flushRun(GrDrawTarget*, GrPipelineBuilder*, BitmapTextBlob*, int
run, GrColor, | 257 inline void flushRun(GrDrawTarget*, GrPipelineBuilder*, BitmapTextBlob*, int
run, GrColor, |
237 uint8_t paintAlpha, SkScalar transX, SkScalar transY); | 258 SkScalar transX, SkScalar transY, const SkPaint&); |
238 inline void flushBigGlyphs(BitmapTextBlob* cacheBlob, GrRenderTarget* rt, | 259 inline void flushBigGlyphs(BitmapTextBlob* cacheBlob, GrRenderTarget* rt, |
239 const GrPaint& grPaint, const GrClip& clip, | 260 const GrPaint& grPaint, const GrClip& clip, |
240 SkScalar transX, SkScalar transY); | 261 SkScalar transX, SkScalar transY); |
241 | 262 |
242 // We have to flush SkTextBlobs differently from drawText / drawPosText | 263 // We have to flush SkTextBlobs differently from drawText / drawPosText |
243 void flush(GrDrawTarget*, const SkTextBlob*, BitmapTextBlob*, GrRenderTarget
*, const SkPaint&, | 264 void flush(GrDrawTarget*, const SkTextBlob*, BitmapTextBlob*, GrRenderTarget
*, const SkPaint&, |
244 const GrPaint&, SkDrawFilter*, const GrClip&, const SkMatrix& vie
wMatrix, | 265 const GrPaint&, SkDrawFilter*, const GrClip&, const SkMatrix& vie
wMatrix, |
245 const SkIRect& clipBounds, SkScalar x, SkScalar y, SkScalar trans
X, SkScalar transY); | 266 const SkIRect& clipBounds, SkScalar x, SkScalar y, SkScalar trans
X, SkScalar transY); |
246 void flush(GrDrawTarget*, BitmapTextBlob*, GrRenderTarget*, const SkPaint&, | 267 void flush(GrDrawTarget*, BitmapTextBlob*, GrRenderTarget*, const SkPaint&, |
247 const GrPaint&, const GrClip&, const SkMatrix& viewMatrix); | 268 const GrPaint&, const GrClip&); |
248 | 269 |
249 void internalDrawText(BitmapTextBlob*, int runIndex, SkGlyphCache*, const Sk
Paint&, | 270 // A helper for drawing BitmapText in a run of distance fields |
250 GrColor color, const SkMatrix& viewMatrix, | 271 inline void fallbackDrawPosText(GrRenderTarget*, const GrClip&, |
251 const char text[], size_t byteLength, | 272 const GrPaint&, |
252 SkScalar x, SkScalar y, const SkIRect& clipRect); | 273 const SkPaint&, const SkMatrix& viewMatrix, |
253 void internalDrawPosText(BitmapTextBlob*, int runIndex, SkGlyphCache*, const
SkPaint&, | 274 const SkTDArray<char>& fallbackTxt, |
| 275 const SkTDArray<SkScalar>& fallbackPos, |
| 276 int scalarsPerPosition, |
| 277 const SkPoint& offset, |
| 278 const SkIRect& clipRect); |
| 279 |
| 280 void internalDrawBMPText(BitmapTextBlob*, int runIndex, SkGlyphCache*, const
SkPaint&, |
254 GrColor color, const SkMatrix& viewMatrix, | 281 GrColor color, const SkMatrix& viewMatrix, |
255 const char text[], size_t byteLength, | 282 const char text[], size_t byteLength, |
256 const SkScalar pos[], int scalarsPerPosition, | 283 SkScalar x, SkScalar y, const SkIRect& clipRect); |
257 const SkPoint& offset, const SkIRect& clipRect); | 284 void internalDrawBMPPosText(BitmapTextBlob*, int runIndex, SkGlyphCache*, co
nst SkPaint&, |
| 285 GrColor color, const SkMatrix& viewMatrix, |
| 286 const char text[], size_t byteLength, |
| 287 const SkScalar pos[], int scalarsPerPosition, |
| 288 const SkPoint& offset, const SkIRect& clipRect); |
| 289 |
| 290 void internalDrawDFText(BitmapTextBlob*, int runIndex, SkGlyphCache*, const
SkPaint&, |
| 291 GrColor color, const SkMatrix& viewMatrix, |
| 292 const char text[], size_t byteLength, |
| 293 SkScalar x, SkScalar y, const SkIRect& clipRect, |
| 294 SkScalar textRatio, |
| 295 SkTDArray<char>* fallbackTxt, |
| 296 SkTDArray<SkScalar>* fallbackPos, |
| 297 SkPoint* offset, const SkPaint& origPaint); |
| 298 void internalDrawDFPosText(BitmapTextBlob*, int runIndex, SkGlyphCache*, con
st SkPaint&, |
| 299 GrColor color, const SkMatrix& viewMatrix, |
| 300 const char text[], size_t byteLength, |
| 301 const SkScalar pos[], int scalarsPerPosition, |
| 302 const SkPoint& offset, const SkIRect& clipRect, |
| 303 SkScalar textRatio, |
| 304 SkTDArray<char>* fallbackTxt, |
| 305 SkTDArray<SkScalar>* fallbackPos); |
258 | 306 |
259 // sets up the descriptor on the blob and returns a detached cache. Client
must attach | 307 // sets up the descriptor on the blob and returns a detached cache. Client
must attach |
260 inline static GrColor ComputeCanonicalColor(const SkPaint&, bool lcd); | 308 inline static GrColor ComputeCanonicalColor(const SkPaint&, bool lcd); |
261 inline SkGlyphCache* setupCache(Run*, const SkPaint&, const SkMatrix& viewMa
trix); | 309 inline SkGlyphCache* setupCache(Run*, const SkPaint&, const SkMatrix* viewMa
trix, bool noGamma); |
262 static inline bool MustRegenerateBlob(SkScalar* outTransX, SkScalar* outTran
sY, | 310 static inline bool MustRegenerateBlob(SkScalar* outTransX, SkScalar* outTran
sY, |
263 const BitmapTextBlob&, const SkPaint&, | 311 const BitmapTextBlob&, const SkPaint&, |
264 const SkMaskFilter::BlurRec&, | 312 const SkMaskFilter::BlurRec&, |
265 const SkMatrix& viewMatrix, SkScalar x
, SkScalar y); | 313 const SkMatrix& viewMatrix, SkScalar x
, SkScalar y); |
266 void regenerateTextBlob(BitmapTextBlob* bmp, const SkPaint& skPaint, GrColor
, | 314 void regenerateTextBlob(BitmapTextBlob* bmp, const SkPaint& skPaint, GrColor
, |
267 const SkMatrix& viewMatrix, | 315 const SkMatrix& viewMatrix, |
268 const SkTextBlob* blob, SkScalar x, SkScalar y, | 316 const SkTextBlob* blob, SkScalar x, SkScalar y, |
269 SkDrawFilter* drawFilter, const SkIRect& clipRect); | 317 SkDrawFilter* drawFilter, const SkIRect& clipRect); |
270 inline static bool HasLCD(const SkTextBlob*); | 318 inline static bool HasLCD(const SkTextBlob*); |
| 319 inline void initDistanceFieldPaint(SkPaint*, SkScalar* textRatio, const SkMa
trix&); |
| 320 |
| 321 // Distance field text needs this table to compute a value for use in the fr
agment shader. |
| 322 // Because the GrAtlasTextContext can go out of scope before the final flush
, this needs to be |
| 323 // refcnted and malloced |
| 324 struct DistanceAdjustTable : public SkNVRefCnt<DistanceAdjustTable> { |
| 325 DistanceAdjustTable(float gamma) { this->buildDistanceAdjustTable(gamma)
; } |
| 326 ~DistanceAdjustTable() { SkDELETE_ARRAY(fTable); } |
| 327 |
| 328 void buildDistanceAdjustTable(float gamma); |
| 329 |
| 330 SkScalar& operator[] (int i) { |
| 331 return fTable[i]; |
| 332 } |
| 333 |
| 334 const SkScalar& operator[] (int i) const { |
| 335 return fTable[i]; |
| 336 } |
| 337 |
| 338 SkScalar* fTable; |
| 339 }; |
271 | 340 |
272 GrBatchTextStrike* fCurrStrike; | 341 GrBatchTextStrike* fCurrStrike; |
273 GrTextBlobCache* fCache; | 342 GrTextBlobCache* fCache; |
| 343 bool fEnableDFRendering; |
| 344 SkAutoTUnref<DistanceAdjustTable> fDistanceAdjustTable; |
274 | 345 |
275 friend class GrTextBlobCache; | 346 friend class GrTextBlobCache; |
276 friend class BitmapTextBatch; | 347 friend class BitmapTextBatch; |
277 | 348 |
278 typedef GrTextContext INHERITED; | 349 typedef GrTextContext INHERITED; |
279 }; | 350 }; |
280 | 351 |
281 #endif | 352 #endif |
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