1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
|
/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrStencilAndCoverTextContext.h"
#include "GrAtlasTextContext.h"
#include "GrContext.h"
#include "GrPath.h"
#include "GrPathRange.h"
#include "GrRenderTargetContext.h"
#include "GrResourceProvider.h"
#include "GrTextUtils.h"
#include "SkAutoKern.h"
#include "SkDraw.h"
#include "SkDrawFilter.h"
#include "SkDrawProcs.h"
#include "SkGlyphCache.h"
#include "SkGr.h"
#include "SkPath.h"
#include "SkTextBlobRunIterator.h"
#include "SkTextFormatParams.h"
#include "SkTextMapStateProc.h"
#include "ops/GrDrawPathOp.h"
template<typename Key, typename Val> static void delete_hash_map_entry(const Key&, Val* val) {
SkASSERT(*val);
delete *val;
}
template<typename T> static void delete_hash_table_entry(T* val) {
SkASSERT(*val);
delete *val;
}
GrStencilAndCoverTextContext::GrStencilAndCoverTextContext(GrAtlasTextContext* fallbackTextContext)
: fFallbackTextContext(fallbackTextContext)
, fCacheSize(0) {
}
GrStencilAndCoverTextContext*
GrStencilAndCoverTextContext::Create(GrAtlasTextContext* fallbackTextContext) {
return new GrStencilAndCoverTextContext(fallbackTextContext);;
}
GrStencilAndCoverTextContext::~GrStencilAndCoverTextContext() {
fBlobIdCache.foreach(delete_hash_map_entry<uint32_t, TextBlob*>);
fBlobKeyCache.foreach(delete_hash_table_entry<TextBlob*>);
}
bool GrStencilAndCoverTextContext::internalCanDraw(const SkPaint& skPaint) {
if (skPaint.getRasterizer()) {
return false;
}
if (skPaint.getMaskFilter()) {
return false;
}
if (SkPathEffect* pe = skPaint.getPathEffect()) {
if (pe->asADash(nullptr) != SkPathEffect::kDash_DashType) {
return false;
}
}
// No hairlines. They would require new paths with customized strokes for every new draw matrix.
return SkPaint::kStroke_Style != skPaint.getStyle() || 0 != skPaint.getStrokeWidth();
}
void GrStencilAndCoverTextContext::drawText(GrContext* context, GrRenderTargetContext* rtc,
const GrClip& clip, const SkPaint& skPaint,
const SkMatrix& viewMatrix, const SkSurfaceProps& props,
const char text[], size_t byteLength, SkScalar x,
SkScalar y, const SkIRect& clipBounds) {
if (context->abandoned()) {
return;
} else if (this->canDraw(skPaint, viewMatrix)) {
if (skPaint.getTextSize() > 0) {
TextRun run(skPaint);
run.setText(text, byteLength, x, y);
run.draw(context, rtc, clip, viewMatrix, props, 0, 0, clipBounds, fFallbackTextContext,
skPaint);
}
return;
}
fFallbackTextContext->drawText(context, rtc, clip, skPaint, viewMatrix, props, text,
byteLength, x, y, clipBounds);
}
void GrStencilAndCoverTextContext::drawPosText(GrContext* context, GrRenderTargetContext* rtc,
const GrClip& clip, const SkPaint& skPaint,
const SkMatrix& viewMatrix,
const SkSurfaceProps& props, const char text[],
size_t byteLength, const SkScalar pos[],
int scalarsPerPosition, const SkPoint& offset,
const SkIRect& clipBounds) {
if (context->abandoned()) {
return;
} else if (this->canDraw(skPaint, viewMatrix)) {
if (skPaint.getTextSize() > 0) {
TextRun run(skPaint);
run.setPosText(text, byteLength, pos, scalarsPerPosition, offset);
run.draw(context, rtc, clip, viewMatrix, props, 0, 0, clipBounds, fFallbackTextContext,
skPaint);
}
return;
}
fFallbackTextContext->drawPosText(context, rtc, clip, skPaint, viewMatrix, props, text,
byteLength, pos, scalarsPerPosition, offset, clipBounds);
}
void GrStencilAndCoverTextContext::uncachedDrawTextBlob(GrContext* context,
GrRenderTargetContext* rtc,
const GrClip& clip,
const SkPaint& skPaint,
const SkMatrix& viewMatrix,
const SkSurfaceProps& props,
const SkTextBlob* blob,
SkScalar x, SkScalar y,
SkDrawFilter* drawFilter,
const SkIRect& clipBounds) {
GrTextUtils::Paint paint(&skPaint, &rtc->colorSpaceInfo());
GrTextUtils::RunPaint runPaint(&paint, drawFilter, props);
SkTextBlobRunIterator it(blob);
for (;!it.done(); it.next()) {
if (!runPaint.modifyForRun(it)) {
continue;
}
size_t textLen = it.glyphCount() * sizeof(uint16_t);
const SkPoint& offset = it.offset();
switch (it.positioning()) {
case SkTextBlob::kDefault_Positioning:
this->drawText(context, rtc, clip, runPaint, viewMatrix, props,
(const char*)it.glyphs(), textLen, x + offset.x(), y + offset.y(),
clipBounds);
break;
case SkTextBlob::kHorizontal_Positioning:
this->drawPosText(context, rtc, clip, runPaint, viewMatrix, props,
(const char*)it.glyphs(), textLen, it.pos(), 1,
SkPoint::Make(x, y + offset.y()), clipBounds);
break;
case SkTextBlob::kFull_Positioning:
this->drawPosText(context, rtc, clip, runPaint, viewMatrix, props,
(const char*)it.glyphs(), textLen, it.pos(), 2,
SkPoint::Make(x, y), clipBounds);
break;
}
}
}
void GrStencilAndCoverTextContext::drawTextBlob(GrContext* context, GrRenderTargetContext* rtc,
const GrClip& clip, const SkPaint& skPaint,
const SkMatrix& viewMatrix,
const SkSurfaceProps& props,
const SkTextBlob* skBlob, SkScalar x, SkScalar y,
SkDrawFilter* drawFilter,
const SkIRect& clipBounds) {
if (context->abandoned()) {
return;
}
if (!this->internalCanDraw(skPaint)) {
fFallbackTextContext->drawTextBlob(context, rtc, clip, skPaint, viewMatrix, props, skBlob,
x, y, drawFilter, clipBounds);
return;
}
if (drawFilter || skPaint.getPathEffect()) {
// This draw can't be cached.
this->uncachedDrawTextBlob(context, rtc, clip, skPaint, viewMatrix, props, skBlob, x, y,
drawFilter, clipBounds);
return;
}
const TextBlob& blob = this->findOrCreateTextBlob(skBlob, skPaint);
TextBlob::Iter iter(blob);
for (TextRun *run = iter.get(), *nextRun; run; run = nextRun) {
nextRun = iter.next();
run->draw(context, rtc, clip, viewMatrix, props, x, y, clipBounds, fFallbackTextContext,
skPaint);
run->releaseGlyphCache();
}
}
static inline int style_key_cnt(const GrStyle& style) {
int cnt = GrStyle::KeySize(style, GrStyle::Apply::kPathEffectAndStrokeRec);
// We should be able to make a key because we filtered out arbitrary path effects.
SkASSERT(cnt > 0);
return cnt;
}
static inline void write_style_key(uint32_t* dst, const GrStyle& style) {
// Pass 1 for the scale since the GPU will apply the style not GrStyle::applyToPath().
GrStyle::WriteKey(dst, style, GrStyle::Apply::kPathEffectAndStrokeRec, SK_Scalar1);
}
const GrStencilAndCoverTextContext::TextBlob&
GrStencilAndCoverTextContext::findOrCreateTextBlob(const SkTextBlob* skBlob,
const SkPaint& skPaint) {
// The font-related parameters are baked into the text blob and will override this skPaint, so
// the only remaining properties that can affect a TextBlob are the ones related to stroke.
if (SkPaint::kFill_Style == skPaint.getStyle()) { // Fast path.
if (TextBlob** found = fBlobIdCache.find(skBlob->uniqueID())) {
fLRUList.remove(*found);
fLRUList.addToTail(*found);
return **found;
}
TextBlob* blob = new TextBlob(skBlob->uniqueID(), skBlob, skPaint);
this->purgeToFit(*blob);
fBlobIdCache.set(skBlob->uniqueID(), blob);
fLRUList.addToTail(blob);
fCacheSize += blob->cpuMemorySize();
return *blob;
} else {
GrStyle style(skPaint);
SkSTArray<4, uint32_t, true> key;
key.reset(1 + style_key_cnt(style));
key[0] = skBlob->uniqueID();
write_style_key(&key[1], style);
if (TextBlob** found = fBlobKeyCache.find(key)) {
fLRUList.remove(*found);
fLRUList.addToTail(*found);
return **found;
}
TextBlob* blob = new TextBlob(key, skBlob, skPaint);
this->purgeToFit(*blob);
fBlobKeyCache.set(blob);
fLRUList.addToTail(blob);
fCacheSize += blob->cpuMemorySize();
return *blob;
}
}
void GrStencilAndCoverTextContext::purgeToFit(const TextBlob& blob) {
static const size_t maxCacheSize = 4 * 1024 * 1024; // Allow up to 4 MB for caching text blobs.
size_t maxSizeForNewBlob = maxCacheSize - blob.cpuMemorySize();
while (fCacheSize && fCacheSize > maxSizeForNewBlob) {
TextBlob* lru = fLRUList.head();
if (1 == lru->key().count()) {
// 1-length keys are unterstood to be the blob id.
fBlobIdCache.remove(lru->key()[0]);
} else {
fBlobKeyCache.remove(lru->key());
}
fLRUList.remove(lru);
fCacheSize -= lru->cpuMemorySize();
delete lru;
}
}
////////////////////////////////////////////////////////////////////////////////////////////////////
void GrStencilAndCoverTextContext::TextBlob::init(const SkTextBlob* skBlob,
const SkPaint& skPaint) {
fCpuMemorySize = sizeof(TextBlob);
SkPaint runPaint(skPaint);
for (SkTextBlobRunIterator iter(skBlob); !iter.done(); iter.next()) {
iter.applyFontToPaint(&runPaint); // No need to re-seed the paint.
if (runPaint.getTextSize() <= 0) {
continue;
}
TextRun* run = this->addToTail(runPaint);
const char* text = reinterpret_cast<const char*>(iter.glyphs());
size_t byteLength = sizeof(uint16_t) * iter.glyphCount();
const SkPoint& runOffset = iter.offset();
switch (iter.positioning()) {
case SkTextBlob::kDefault_Positioning:
run->setText(text, byteLength, runOffset.fX, runOffset.fY);
break;
case SkTextBlob::kHorizontal_Positioning:
run->setPosText(text, byteLength, iter.pos(), 1, SkPoint::Make(0, runOffset.fY));
break;
case SkTextBlob::kFull_Positioning:
run->setPosText(text, byteLength, iter.pos(), 2, SkPoint::Make(0, 0));
break;
}
fCpuMemorySize += run->computeSizeInCache();
}
}
////////////////////////////////////////////////////////////////////////////////////////////////////
class GrStencilAndCoverTextContext::FallbackBlobBuilder {
public:
FallbackBlobBuilder() : fBuffIdx(0), fCount(0) {}
bool isInitialized() const { return fBuilder != nullptr; }
void init(const SkPaint& font, SkScalar textRatio);
void appendGlyph(uint16_t glyphId, const SkPoint& pos);
sk_sp<SkTextBlob> makeIfNeeded(int* count);
private:
enum { kWriteBufferSize = 1024 };
void flush();
std::unique_ptr<SkTextBlobBuilder> fBuilder;
SkPaint fFont;
int fBuffIdx;
int fCount;
uint16_t fGlyphIds[kWriteBufferSize];
SkPoint fPositions[kWriteBufferSize];
};
////////////////////////////////////////////////////////////////////////////////////////////////////
GrStencilAndCoverTextContext::TextRun::TextRun(const SkPaint& fontAndStroke)
: fStyle(fontAndStroke)
, fFont(fontAndStroke)
, fTotalGlyphCount(0)
, fFallbackGlyphCount(0)
, fDetachedGlyphCache(nullptr)
, fLastDrawnGlyphsID(SK_InvalidUniqueID) {
SkASSERT(fFont.getTextSize() > 0);
SkASSERT(!fStyle.hasNonDashPathEffect()); // Arbitrary path effects not supported.
SkASSERT(!fStyle.isSimpleHairline()); // Hairlines are not supported.
// Setting to "fill" ensures that no strokes get baked into font outlines. (We use the GPU path
// rendering API for stroking).
fFont.setStyle(SkPaint::kFill_Style);
if (fFont.isFakeBoldText() && fStyle.isSimpleFill()) {
const SkStrokeRec& stroke = fStyle.strokeRec();
// Instead of letting fake bold get baked into the glyph outlines, do it with GPU stroke.
SkScalar fakeBoldScale = SkScalarInterpFunc(fFont.getTextSize(),
kStdFakeBoldInterpKeys,
kStdFakeBoldInterpValues,
kStdFakeBoldInterpLength);
SkScalar extra = fFont.getTextSize() * fakeBoldScale;
SkStrokeRec strokeRec(SkStrokeRec::kFill_InitStyle);
strokeRec.setStrokeStyle(stroke.needToApply() ? stroke.getWidth() + extra : extra,
true /*strokeAndFill*/);
fStyle = GrStyle(strokeRec, fStyle.refPathEffect());
fFont.setFakeBoldText(false);
}
if (!fFont.getPathEffect() && !fStyle.isDashed()) {
const SkStrokeRec& stroke = fStyle.strokeRec();
// We can draw the glyphs from canonically sized paths.
fTextRatio = fFont.getTextSize() / SkPaint::kCanonicalTextSizeForPaths;
fTextInverseRatio = SkPaint::kCanonicalTextSizeForPaths / fFont.getTextSize();
// Compensate for the glyphs being scaled by fTextRatio.
if (!fStyle.isSimpleFill()) {
SkStrokeRec strokeRec(SkStrokeRec::kFill_InitStyle);
strokeRec.setStrokeStyle(stroke.getWidth() / fTextRatio,
SkStrokeRec::kStrokeAndFill_Style == stroke.getStyle());
fStyle = GrStyle(strokeRec, fStyle.refPathEffect());
}
fFont.setLinearText(true);
fFont.setLCDRenderText(false);
fFont.setAutohinted(false);
fFont.setHinting(SkPaint::kNo_Hinting);
fFont.setSubpixelText(true);
fFont.setTextSize(SkIntToScalar(SkPaint::kCanonicalTextSizeForPaths));
fUsingRawGlyphPaths = SK_Scalar1 == fFont.getTextScaleX() &&
0 == fFont.getTextSkewX() &&
!fFont.isFakeBoldText() &&
!fFont.isVerticalText();
} else {
fTextRatio = fTextInverseRatio = 1.0f;
fUsingRawGlyphPaths = false;
}
// Generate the key that will be used to cache the GPU glyph path objects.
if (fUsingRawGlyphPaths && fStyle.isSimpleFill()) {
static const GrUniqueKey::Domain kRawFillPathGlyphDomain = GrUniqueKey::GenerateDomain();
const SkTypeface* typeface = fFont.getTypeface();
GrUniqueKey::Builder builder(&fGlyphPathsKey, kRawFillPathGlyphDomain, 1);
reinterpret_cast<uint32_t&>(builder[0]) = typeface ? typeface->uniqueID() : 0;
} else {
static const GrUniqueKey::Domain kPathGlyphDomain = GrUniqueKey::GenerateDomain();
int styleDataCount = GrStyle::KeySize(fStyle, GrStyle::Apply::kPathEffectAndStrokeRec);
// Key should be valid since we opted out of drawing arbitrary path effects.
SkASSERT(styleDataCount >= 0);
if (fUsingRawGlyphPaths) {
const SkTypeface* typeface = fFont.getTypeface();
GrUniqueKey::Builder builder(&fGlyphPathsKey, kPathGlyphDomain, 2 + styleDataCount);
reinterpret_cast<uint32_t&>(builder[0]) = typeface ? typeface->uniqueID() : 0;
reinterpret_cast<uint32_t&>(builder[1]) = styleDataCount;
if (styleDataCount) {
write_style_key(&builder[2], fStyle);
}
} else {
SkGlyphCache* glyphCache = this->getGlyphCache();
const SkTypeface* typeface = glyphCache->getScalerContext()->getTypeface();
const SkDescriptor* desc = &glyphCache->getDescriptor();
int descDataCount = (desc->getLength() + 3) / 4;
GrUniqueKey::Builder builder(&fGlyphPathsKey, kPathGlyphDomain,
2 + styleDataCount + descDataCount);
reinterpret_cast<uint32_t&>(builder[0]) = typeface ? typeface->uniqueID() : 0;
reinterpret_cast<uint32_t&>(builder[1]) = styleDataCount | (descDataCount << 16);
if (styleDataCount) {
write_style_key(&builder[2], fStyle);
}
memcpy(&builder[2 + styleDataCount], desc, desc->getLength());
}
}
}
GrStencilAndCoverTextContext::TextRun::~TextRun() {
this->releaseGlyphCache();
}
void GrStencilAndCoverTextContext::TextRun::setText(const char text[], size_t byteLength,
SkScalar x, SkScalar y) {
SkASSERT(byteLength == 0 || text != nullptr);
SkGlyphCache* glyphCache = this->getGlyphCache();
SkPaint::GlyphCacheProc glyphCacheProc = SkPaint::GetGlyphCacheProc(fFont.getTextEncoding(),
fFont.isDevKernText(),
true);
fTotalGlyphCount = fFont.countText(text, byteLength);
fInstanceData.reset(InstanceData::Alloc(GrPathRendering::kTranslate_PathTransformType,
fTotalGlyphCount));
const char* stop = text + byteLength;
// Measure first if needed.
if (fFont.getTextAlign() != SkPaint::kLeft_Align) {
SkScalar stopX = 0;
SkScalar stopY = 0;
const char* textPtr = text;
while (textPtr < stop) {
// We don't need x, y here, since all subpixel variants will have the
// same advance.
const SkGlyph& glyph = glyphCacheProc(glyphCache, &textPtr);
stopX += SkFloatToScalar(glyph.fAdvanceX);
stopY += SkFloatToScalar(glyph.fAdvanceY);
}
SkASSERT(textPtr == stop);
SkScalar alignX = stopX * fTextRatio;
SkScalar alignY = stopY * fTextRatio;
if (fFont.getTextAlign() == SkPaint::kCenter_Align) {
alignX = SkScalarHalf(alignX);
alignY = SkScalarHalf(alignY);
}
x -= alignX;
y -= alignY;
}
SkAutoKern autokern;
FallbackBlobBuilder fallback;
while (text < stop) {
const SkGlyph& glyph = glyphCacheProc(glyphCache, &text);
x += autokern.adjust(glyph) * fTextRatio;
if (glyph.fWidth) {
this->appendGlyph(glyph, SkPoint::Make(x, y), &fallback);
}
x += SkFloatToScalar(glyph.fAdvanceX) * fTextRatio;
y += SkFloatToScalar(glyph.fAdvanceY) * fTextRatio;
}
fFallbackTextBlob = fallback.makeIfNeeded(&fFallbackGlyphCount);
}
void GrStencilAndCoverTextContext::TextRun::setPosText(const char text[], size_t byteLength,
const SkScalar pos[], int scalarsPerPosition,
const SkPoint& offset) {
SkASSERT(byteLength == 0 || text != nullptr);
SkASSERT(1 == scalarsPerPosition || 2 == scalarsPerPosition);
SkGlyphCache* glyphCache = this->getGlyphCache();
SkPaint::GlyphCacheProc glyphCacheProc = SkPaint::GetGlyphCacheProc(fFont.getTextEncoding(),
fFont.isDevKernText(),
true);
fTotalGlyphCount = fFont.countText(text, byteLength);
fInstanceData.reset(InstanceData::Alloc(GrPathRendering::kTranslate_PathTransformType,
fTotalGlyphCount));
const char* stop = text + byteLength;
SkTextMapStateProc tmsProc(SkMatrix::I(), offset, scalarsPerPosition);
SkTextAlignProc alignProc(fFont.getTextAlign());
FallbackBlobBuilder fallback;
while (text < stop) {
const SkGlyph& glyph = glyphCacheProc(glyphCache, &text);
if (glyph.fWidth) {
SkPoint tmsLoc;
tmsProc(pos, &tmsLoc);
SkPoint loc;
alignProc(tmsLoc, glyph, &loc);
this->appendGlyph(glyph, loc, &fallback);
}
pos += scalarsPerPosition;
}
fFallbackTextBlob = fallback.makeIfNeeded(&fFallbackGlyphCount);
}
sk_sp<GrPathRange> GrStencilAndCoverTextContext::TextRun::createGlyphs(
GrResourceProvider* resourceProvider) const {
sk_sp<GrPathRange> glyphs =
resourceProvider->findByUniqueKey<GrPathRange>(fGlyphPathsKey);
if (!glyphs) {
if (fUsingRawGlyphPaths) {
SkScalerContextEffects noeffects;
glyphs = resourceProvider->createGlyphs(fFont.getTypeface(), noeffects,
nullptr, fStyle);
} else {
SkGlyphCache* cache = this->getGlyphCache();
glyphs = resourceProvider->createGlyphs(cache->getScalerContext()->getTypeface(),
cache->getScalerContext()->getEffects(),
&cache->getDescriptor(),
fStyle);
}
resourceProvider->assignUniqueKeyToResource(fGlyphPathsKey, glyphs.get());
}
return glyphs;
}
inline void GrStencilAndCoverTextContext::TextRun::appendGlyph(const SkGlyph& glyph,
const SkPoint& pos,
FallbackBlobBuilder* fallback) {
// Stick the glyphs we can't draw into the fallback text blob.
if (SkMask::kARGB32_Format == glyph.fMaskFormat) {
if (!fallback->isInitialized()) {
fallback->init(fFont, fTextRatio);
}
fallback->appendGlyph(glyph.getGlyphID(), pos);
} else {
fInstanceData->append(glyph.getGlyphID(), fTextInverseRatio * pos.x(),
fTextInverseRatio * pos.y());
}
}
void GrStencilAndCoverTextContext::TextRun::draw(GrContext* ctx,
GrRenderTargetContext* renderTargetContext,
const GrClip& clip, const SkMatrix& viewMatrix,
const SkSurfaceProps& props, SkScalar x,
SkScalar y, const SkIRect& clipBounds,
GrAtlasTextContext* fallbackTextContext,
const SkPaint& originalSkPaint) const {
SkASSERT(fInstanceData);
if (fInstanceData->count()) {
sk_sp<GrPathRange> glyphs(this->createGlyphs(ctx->resourceProvider()));
if (fLastDrawnGlyphsID != glyphs->uniqueID()) {
// Either this is the first draw or the glyphs object was purged since last draw.
glyphs->loadPathsIfNeeded(fInstanceData->indices(), fInstanceData->count());
fLastDrawnGlyphsID = glyphs->uniqueID();
}
GrPaint grPaint;
if (!SkPaintToGrPaint(ctx, renderTargetContext->colorSpaceInfo(), originalSkPaint,
viewMatrix, &grPaint)) {
return;
}
// Don't compute a bounding box. For dst copy texture, we'll opt instead for it to just copy
// the entire dst. Realistically this is a moot point, because any context that supports
// NV_path_rendering will also support NV_blend_equation_advanced.
// For clipping we'll just skip any optimizations based on the bounds. This does, however,
// hurt GrOp combining.
const SkRect bounds = SkRect::MakeIWH(renderTargetContext->width(),
renderTargetContext->height());
// The run's "font" overrides the anti-aliasing of the passed in SkPaint!
GrAAType aaType = GrChooseAAType(this->aa(), renderTargetContext->fsaaType(),
GrAllowMixedSamples::kYes, *renderTargetContext->caps());
std::unique_ptr<GrDrawOp> op = GrDrawPathRangeOp::Make(
viewMatrix, fTextRatio, fTextInverseRatio * x, fTextInverseRatio * y,
std::move(grPaint), GrPathRendering::kWinding_FillType, aaType, glyphs.get(),
fInstanceData.get(), bounds);
renderTargetContext->addDrawOp(clip, std::move(op));
}
if (fFallbackTextBlob) {
SkPaint fallbackSkPaint(originalSkPaint);
fStyle.strokeRec().applyToPaint(&fallbackSkPaint);
if (!fStyle.isSimpleFill()) {
fallbackSkPaint.setStrokeWidth(fStyle.strokeRec().getWidth() * fTextRatio);
}
fallbackTextContext->drawTextBlob(ctx, renderTargetContext, clip, fallbackSkPaint,
viewMatrix, props, fFallbackTextBlob.get(), x, y, nullptr,
clipBounds);
}
}
SkGlyphCache* GrStencilAndCoverTextContext::TextRun::getGlyphCache() const {
if (!fDetachedGlyphCache) {
fDetachedGlyphCache = fFont.detachCache(nullptr, SkPaint::kNone_ScalerContextFlags,
nullptr);
}
return fDetachedGlyphCache;
}
void GrStencilAndCoverTextContext::TextRun::releaseGlyphCache() const {
if (fDetachedGlyphCache) {
SkGlyphCache::AttachCache(fDetachedGlyphCache);
fDetachedGlyphCache = nullptr;
}
}
size_t GrStencilAndCoverTextContext::TextRun::computeSizeInCache() const {
size_t size = sizeof(TextRun) + fGlyphPathsKey.size();
// The instance data always reserves enough space for every glyph.
size += (fTotalGlyphCount + fFallbackGlyphCount) * (sizeof(uint16_t) + 2 * sizeof(float));
if (fInstanceData) {
size += sizeof(InstanceData);
}
if (fFallbackTextBlob) {
size += sizeof(SkTextBlob);
}
return size;
}
////////////////////////////////////////////////////////////////////////////////////////////////////
void GrStencilAndCoverTextContext::FallbackBlobBuilder::init(const SkPaint& font,
SkScalar textRatio) {
SkASSERT(!this->isInitialized());
fBuilder.reset(new SkTextBlobBuilder);
fFont = font;
fFont.setTextAlign(SkPaint::kLeft_Align); // The glyph positions will already account for align.
fFont.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
// No need for subpixel positioning with bitmap glyphs. TODO: revisit if non-bitmap color glyphs
// show up and https://code.google.com/p/skia/issues/detail?id=4408 gets resolved.
fFont.setSubpixelText(false);
fFont.setTextSize(fFont.getTextSize() * textRatio);
fBuffIdx = 0;
}
void GrStencilAndCoverTextContext::FallbackBlobBuilder::appendGlyph(uint16_t glyphId,
const SkPoint& pos) {
SkASSERT(this->isInitialized());
if (fBuffIdx >= kWriteBufferSize) {
this->flush();
}
fGlyphIds[fBuffIdx] = glyphId;
fPositions[fBuffIdx] = pos;
fBuffIdx++;
fCount++;
}
void GrStencilAndCoverTextContext::FallbackBlobBuilder::flush() {
SkASSERT(this->isInitialized());
SkASSERT(fBuffIdx <= kWriteBufferSize);
if (!fBuffIdx) {
return;
}
// This will automatically merge with previous runs since we use the same font.
const SkTextBlobBuilder::RunBuffer& buff = fBuilder->allocRunPos(fFont, fBuffIdx);
memcpy(buff.glyphs, fGlyphIds, fBuffIdx * sizeof(uint16_t));
memcpy(buff.pos, fPositions[0].asScalars(), fBuffIdx * 2 * sizeof(SkScalar));
fBuffIdx = 0;
}
sk_sp<SkTextBlob> GrStencilAndCoverTextContext::FallbackBlobBuilder::makeIfNeeded(int *count) {
*count = fCount;
if (fCount) {
this->flush();
return fBuilder->make();
}
return nullptr;
}
|