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
|
/*
* 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 "GrAADistanceFieldPathRenderer.h"
#include "GrBatchTarget.h"
#include "GrBatchTest.h"
#include "GrContext.h"
#include "GrPipelineBuilder.h"
#include "GrResourceProvider.h"
#include "GrSurfacePriv.h"
#include "GrSWMaskHelper.h"
#include "GrTexturePriv.h"
#include "GrVertexBuffer.h"
#include "batches/GrBatch.h"
#include "effects/GrDistanceFieldGeoProc.h"
#include "SkDistanceFieldGen.h"
#include "SkRTConf.h"
#define ATLAS_TEXTURE_WIDTH 1024
#define ATLAS_TEXTURE_HEIGHT 2048
#define PLOT_WIDTH 256
#define PLOT_HEIGHT 256
#define NUM_PLOTS_X (ATLAS_TEXTURE_WIDTH / PLOT_WIDTH)
#define NUM_PLOTS_Y (ATLAS_TEXTURE_HEIGHT / PLOT_HEIGHT)
#ifdef DF_PATH_TRACKING
static int g_NumCachedPaths = 0;
static int g_NumFreedPaths = 0;
#endif
// mip levels
static const int kSmallMIP = 32;
static const int kMediumMIP = 78;
static const int kLargeMIP = 192;
// Callback to clear out internal path cache when eviction occurs
void GrAADistanceFieldPathRenderer::HandleEviction(GrBatchAtlas::AtlasID id, void* pr) {
GrAADistanceFieldPathRenderer* dfpr = (GrAADistanceFieldPathRenderer*)pr;
// remove any paths that use this plot
PathDataList::Iter iter;
iter.init(dfpr->fPathList, PathDataList::Iter::kHead_IterStart);
PathData* pathData;
while ((pathData = iter.get())) {
iter.next();
if (id == pathData->fID) {
dfpr->fPathCache.remove(pathData->fKey);
dfpr->fPathList.remove(pathData);
SkDELETE(pathData);
#ifdef DF_PATH_TRACKING
++g_NumFreedPaths;
#endif
}
}
}
////////////////////////////////////////////////////////////////////////////////
GrAADistanceFieldPathRenderer::GrAADistanceFieldPathRenderer() : fAtlas(NULL) {}
GrAADistanceFieldPathRenderer::~GrAADistanceFieldPathRenderer() {
PathDataList::Iter iter;
iter.init(fPathList, PathDataList::Iter::kHead_IterStart);
PathData* pathData;
while ((pathData = iter.get())) {
iter.next();
fPathList.remove(pathData);
SkDELETE(pathData);
}
SkDELETE(fAtlas);
#ifdef DF_PATH_TRACKING
SkDebugf("Cached paths: %d, freed paths: %d\n", g_NumCachedPaths, g_NumFreedPaths);
#endif
}
////////////////////////////////////////////////////////////////////////////////
bool GrAADistanceFieldPathRenderer::onCanDrawPath(const CanDrawPathArgs& args) const {
// TODO: Support inverse fill
// TODO: Support strokes
if (!args.fTarget->caps()->shaderCaps()->shaderDerivativeSupport() || !args.fAntiAlias ||
args.fPath->isInverseFillType() || args.fPath->isVolatile() ||
!args.fStroke->isFillStyle()) {
return false;
}
// currently don't support perspective
if (args.fViewMatrix->hasPerspective()) {
return false;
}
// only support paths smaller than 64x64, scaled to less than 256x256
// the goal is to accelerate rendering of lots of small paths that may be scaling
SkScalar maxScale = args.fViewMatrix->getMaxScale();
const SkRect& bounds = args.fPath->getBounds();
SkScalar maxDim = SkMaxScalar(bounds.width(), bounds.height());
return maxDim < 64.f && maxDim * maxScale < 256.f;
}
GrPathRenderer::StencilSupport
GrAADistanceFieldPathRenderer::onGetStencilSupport(const GrDrawTarget*,
const GrPipelineBuilder*,
const SkPath&,
const GrStrokeInfo&) const {
return GrPathRenderer::kNoSupport_StencilSupport;
}
////////////////////////////////////////////////////////////////////////////////
// padding around path bounds to allow for antialiased pixels
static const SkScalar kAntiAliasPad = 1.0f;
class AADistanceFieldPathBatch : public GrBatch {
public:
typedef GrAADistanceFieldPathRenderer::PathData PathData;
typedef SkTDynamicHash<PathData, PathData::Key> PathCache;
typedef GrAADistanceFieldPathRenderer::PathDataList PathDataList;
struct Geometry {
Geometry(const SkStrokeRec& stroke) : fStroke(stroke) {}
SkPath fPath;
SkStrokeRec fStroke;
bool fAntiAlias;
PathData* fPathData;
};
static GrBatch* Create(const Geometry& geometry, GrColor color, const SkMatrix& viewMatrix,
GrBatchAtlas* atlas, PathCache* pathCache, PathDataList* pathList) {
return SkNEW_ARGS(AADistanceFieldPathBatch, (geometry, color, viewMatrix,
atlas, pathCache, pathList));
}
const char* name() const override { return "AADistanceFieldPathBatch"; }
void getInvariantOutputColor(GrInitInvariantOutput* out) const override {
out->setKnownFourComponents(fBatch.fColor);
}
void getInvariantOutputCoverage(GrInitInvariantOutput* out) const override {
out->setUnknownSingleComponent();
}
void initBatchTracker(const GrPipelineInfo& init) override {
// Handle any color overrides
if (!init.readsColor()) {
fBatch.fColor = GrColor_ILLEGAL;
}
init.getOverrideColorIfSet(&fBatch.fColor);
// setup batch properties
fBatch.fColorIgnored = !init.readsColor();
fBatch.fUsesLocalCoords = init.readsLocalCoords();
fBatch.fCoverageIgnored = !init.readsCoverage();
}
struct FlushInfo {
SkAutoTUnref<const GrVertexBuffer> fVertexBuffer;
SkAutoTUnref<const GrIndexBuffer> fIndexBuffer;
int fVertexOffset;
int fInstancesToFlush;
};
void generateGeometry(GrBatchTarget* batchTarget) override {
int instanceCount = fGeoData.count();
SkMatrix invert;
if (this->usesLocalCoords() && !this->viewMatrix().invert(&invert)) {
SkDebugf("Could not invert viewmatrix\n");
return;
}
uint32_t flags = 0;
flags |= this->viewMatrix().isSimilarity() ? kSimilarity_DistanceFieldEffectFlag : 0;
GrTextureParams params(SkShader::kRepeat_TileMode, GrTextureParams::kBilerp_FilterMode);
// Setup GrGeometryProcessor
GrBatchAtlas* atlas = fAtlas;
SkAutoTUnref<GrGeometryProcessor> dfProcessor(
GrDistanceFieldPathGeoProc::Create(this->color(),
this->viewMatrix(),
atlas->getTexture(),
params,
flags,
this->usesLocalCoords()));
batchTarget->initDraw(dfProcessor, this->pipeline());
FlushInfo flushInfo;
// allocate vertices
size_t vertexStride = dfProcessor->getVertexStride();
SkASSERT(vertexStride == 2 * sizeof(SkPoint));
const GrVertexBuffer* vertexBuffer;
void* vertices = batchTarget->makeVertSpace(vertexStride,
kVerticesPerQuad * instanceCount,
&vertexBuffer,
&flushInfo.fVertexOffset);
flushInfo.fVertexBuffer.reset(SkRef(vertexBuffer));
flushInfo.fIndexBuffer.reset(batchTarget->resourceProvider()->refQuadIndexBuffer());
if (!vertices || !flushInfo.fIndexBuffer) {
SkDebugf("Could not allocate vertices\n");
return;
}
flushInfo.fInstancesToFlush = 0;
for (int i = 0; i < instanceCount; i++) {
Geometry& args = fGeoData[i];
// get mip level
SkScalar maxScale = this->viewMatrix().getMaxScale();
const SkRect& bounds = args.fPath.getBounds();
SkScalar maxDim = SkMaxScalar(bounds.width(), bounds.height());
SkScalar size = maxScale * maxDim;
uint32_t desiredDimension;
if (size <= kSmallMIP) {
desiredDimension = kSmallMIP;
} else if (size <= kMediumMIP) {
desiredDimension = kMediumMIP;
} else {
desiredDimension = kLargeMIP;
}
// check to see if path is cached
// TODO: handle stroked vs. filled version of same path
PathData::Key key = { args.fPath.getGenerationID(), desiredDimension };
args.fPathData = fPathCache->find(key);
if (NULL == args.fPathData || !atlas->hasID(args.fPathData->fID)) {
// Remove the stale cache entry
if (args.fPathData) {
fPathCache->remove(args.fPathData->fKey);
fPathList->remove(args.fPathData);
SkDELETE(args.fPathData);
}
SkScalar scale = desiredDimension/maxDim;
args.fPathData = SkNEW(PathData);
if (!this->addPathToAtlas(batchTarget,
dfProcessor,
this->pipeline(),
&flushInfo,
atlas,
args.fPathData,
args.fPath,
args.fStroke,
args.fAntiAlias,
desiredDimension,
scale)) {
SkDebugf("Can't rasterize path\n");
return;
}
}
atlas->setLastUseToken(args.fPathData->fID, batchTarget->currentToken());
// Now set vertices
intptr_t offset = reinterpret_cast<intptr_t>(vertices);
offset += i * kVerticesPerQuad * vertexStride;
SkPoint* positions = reinterpret_cast<SkPoint*>(offset);
this->writePathVertices(batchTarget,
atlas,
this->pipeline(),
dfProcessor,
positions,
vertexStride,
this->viewMatrix(),
args.fPath,
args.fPathData);
flushInfo.fInstancesToFlush++;
}
this->flush(batchTarget, &flushInfo);
}
SkSTArray<1, Geometry, true>* geoData() { return &fGeoData; }
private:
AADistanceFieldPathBatch(const Geometry& geometry, GrColor color, const SkMatrix& viewMatrix,
GrBatchAtlas* atlas,
PathCache* pathCache, PathDataList* pathList) {
this->initClassID<AADistanceFieldPathBatch>();
fBatch.fColor = color;
fBatch.fViewMatrix = viewMatrix;
fGeoData.push_back(geometry);
fGeoData.back().fPathData = NULL;
fAtlas = atlas;
fPathCache = pathCache;
fPathList = pathList;
// Compute bounds
fBounds = geometry.fPath.getBounds();
viewMatrix.mapRect(&fBounds);
}
bool addPathToAtlas(GrBatchTarget* batchTarget,
const GrGeometryProcessor* dfProcessor,
const GrPipeline* pipeline,
FlushInfo* flushInfo,
GrBatchAtlas* atlas,
PathData* pathData,
const SkPath& path,
const SkStrokeRec&
stroke, bool antiAlias,
uint32_t dimension,
SkScalar scale) {
const SkRect& bounds = path.getBounds();
// generate bounding rect for bitmap draw
SkRect scaledBounds = bounds;
// scale to mip level size
scaledBounds.fLeft *= scale;
scaledBounds.fTop *= scale;
scaledBounds.fRight *= scale;
scaledBounds.fBottom *= scale;
// move the origin to an integer boundary (gives better results)
SkScalar dx = SkScalarFraction(scaledBounds.fLeft);
SkScalar dy = SkScalarFraction(scaledBounds.fTop);
scaledBounds.offset(-dx, -dy);
// get integer boundary
SkIRect devPathBounds;
scaledBounds.roundOut(&devPathBounds);
// pad to allow room for antialiasing
devPathBounds.outset(SkScalarCeilToInt(kAntiAliasPad), SkScalarCeilToInt(kAntiAliasPad));
// move origin to upper left corner
devPathBounds.offsetTo(0,0);
// draw path to bitmap
SkMatrix drawMatrix;
drawMatrix.setTranslate(-bounds.left(), -bounds.top());
drawMatrix.postScale(scale, scale);
drawMatrix.postTranslate(kAntiAliasPad, kAntiAliasPad);
// setup bitmap backing
// Now translate so the bound's UL corner is at the origin
drawMatrix.postTranslate(-devPathBounds.fLeft * SK_Scalar1,
-devPathBounds.fTop * SK_Scalar1);
SkIRect pathBounds = SkIRect::MakeWH(devPathBounds.width(),
devPathBounds.height());
SkAutoPixmapStorage dst;
if (!dst.tryAlloc(SkImageInfo::MakeA8(pathBounds.width(),
pathBounds.height()))) {
return false;
}
sk_bzero(dst.writable_addr(), dst.getSafeSize());
// rasterize path
SkPaint paint;
if (stroke.isHairlineStyle()) {
paint.setStyle(SkPaint::kStroke_Style);
paint.setStrokeWidth(SK_Scalar1);
} else {
if (stroke.isFillStyle()) {
paint.setStyle(SkPaint::kFill_Style);
} else {
paint.setStyle(SkPaint::kStroke_Style);
paint.setStrokeJoin(stroke.getJoin());
paint.setStrokeCap(stroke.getCap());
paint.setStrokeWidth(stroke.getWidth());
}
}
paint.setAntiAlias(antiAlias);
SkDraw draw;
sk_bzero(&draw, sizeof(draw));
SkRasterClip rasterClip;
rasterClip.setRect(pathBounds);
draw.fRC = &rasterClip;
draw.fClip = &rasterClip.bwRgn();
draw.fMatrix = &drawMatrix;
draw.fDst = dst;
draw.drawPathCoverage(path, paint);
// generate signed distance field
devPathBounds.outset(SK_DistanceFieldPad, SK_DistanceFieldPad);
int width = devPathBounds.width();
int height = devPathBounds.height();
// TODO We should really generate this directly into the plot somehow
SkAutoSMalloc<1024> dfStorage(width * height * sizeof(unsigned char));
// Generate signed distance field
SkGenerateDistanceFieldFromA8Image((unsigned char*)dfStorage.get(),
(const unsigned char*)dst.addr(),
dst.width(), dst.height(), dst.rowBytes());
// add to atlas
SkIPoint16 atlasLocation;
GrBatchAtlas::AtlasID id;
bool success = atlas->addToAtlas(&id, batchTarget, width, height, dfStorage.get(),
&atlasLocation);
if (!success) {
this->flush(batchTarget, flushInfo);
batchTarget->initDraw(dfProcessor, pipeline);
SkDEBUGCODE(success =) atlas->addToAtlas(&id, batchTarget, width, height,
dfStorage.get(), &atlasLocation);
SkASSERT(success);
}
// add to cache
pathData->fKey.fGenID = path.getGenerationID();
pathData->fKey.fDimension = dimension;
pathData->fScale = scale;
pathData->fID = id;
// change the scaled rect to match the size of the inset distance field
scaledBounds.fRight = scaledBounds.fLeft +
SkIntToScalar(devPathBounds.width() - 2*SK_DistanceFieldInset);
scaledBounds.fBottom = scaledBounds.fTop +
SkIntToScalar(devPathBounds.height() - 2*SK_DistanceFieldInset);
// shift the origin to the correct place relative to the distance field
// need to also restore the fractional translation
scaledBounds.offset(-SkIntToScalar(SK_DistanceFieldInset) - kAntiAliasPad + dx,
-SkIntToScalar(SK_DistanceFieldInset) - kAntiAliasPad + dy);
pathData->fBounds = scaledBounds;
// origin we render from is inset from distance field edge
atlasLocation.fX += SK_DistanceFieldInset;
atlasLocation.fY += SK_DistanceFieldInset;
pathData->fAtlasLocation = atlasLocation;
fPathCache->add(pathData);
fPathList->addToTail(pathData);
#ifdef DF_PATH_TRACKING
++g_NumCachedPaths;
#endif
return true;
}
void writePathVertices(GrBatchTarget* target,
GrBatchAtlas* atlas,
const GrPipeline* pipeline,
const GrGeometryProcessor* gp,
SkPoint* positions,
size_t vertexStride,
const SkMatrix& viewMatrix,
const SkPath& path,
const PathData* pathData) {
GrTexture* texture = atlas->getTexture();
SkScalar dx = pathData->fBounds.fLeft;
SkScalar dy = pathData->fBounds.fTop;
SkScalar width = pathData->fBounds.width();
SkScalar height = pathData->fBounds.height();
SkScalar invScale = 1.0f / pathData->fScale;
dx *= invScale;
dy *= invScale;
width *= invScale;
height *= invScale;
SkFixed tx = SkIntToFixed(pathData->fAtlasLocation.fX);
SkFixed ty = SkIntToFixed(pathData->fAtlasLocation.fY);
SkFixed tw = SkScalarToFixed(pathData->fBounds.width());
SkFixed th = SkScalarToFixed(pathData->fBounds.height());
// vertex positions
// TODO make the vertex attributes a struct
SkRect r = SkRect::MakeXYWH(dx, dy, width, height);
positions->setRectFan(r.left(), r.top(), r.right(), r.bottom(), vertexStride);
// vertex texture coords
SkPoint* textureCoords = positions + 1;
textureCoords->setRectFan(SkFixedToFloat(texture->texturePriv().normalizeFixedX(tx)),
SkFixedToFloat(texture->texturePriv().normalizeFixedY(ty)),
SkFixedToFloat(texture->texturePriv().normalizeFixedX(tx + tw)),
SkFixedToFloat(texture->texturePriv().normalizeFixedY(ty + th)),
vertexStride);
}
void flush(GrBatchTarget* batchTarget, FlushInfo* flushInfo) {
GrVertices vertices;
int maxInstancesPerDraw = flushInfo->fIndexBuffer->maxQuads();
vertices.initInstanced(kTriangles_GrPrimitiveType, flushInfo->fVertexBuffer,
flushInfo->fIndexBuffer, flushInfo->fVertexOffset, kVerticesPerQuad,
kIndicesPerQuad, flushInfo->fInstancesToFlush, maxInstancesPerDraw);
batchTarget->draw(vertices);
flushInfo->fVertexOffset += kVerticesPerQuad * flushInfo->fInstancesToFlush;
flushInfo->fInstancesToFlush = 0;
}
GrColor color() const { return fBatch.fColor; }
const SkMatrix& viewMatrix() const { return fBatch.fViewMatrix; }
bool usesLocalCoords() const { return fBatch.fUsesLocalCoords; }
bool onCombineIfPossible(GrBatch* t) override {
if (!this->pipeline()->isEqual(*t->pipeline())) {
return false;
}
AADistanceFieldPathBatch* that = t->cast<AADistanceFieldPathBatch>();
// TODO we could actually probably do a bunch of this work on the CPU, ie map viewMatrix,
// maybe upload color via attribute
if (this->color() != that->color()) {
return false;
}
if (!this->viewMatrix().cheapEqualTo(that->viewMatrix())) {
return false;
}
fGeoData.push_back_n(that->geoData()->count(), that->geoData()->begin());
this->joinBounds(that->bounds());
return true;
}
struct BatchTracker {
GrColor fColor;
SkMatrix fViewMatrix;
bool fUsesLocalCoords;
bool fColorIgnored;
bool fCoverageIgnored;
};
BatchTracker fBatch;
SkSTArray<1, Geometry, true> fGeoData;
GrBatchAtlas* fAtlas;
PathCache* fPathCache;
PathDataList* fPathList;
};
bool GrAADistanceFieldPathRenderer::onDrawPath(const DrawPathArgs& args) {
// we've already bailed on inverse filled paths, so this is safe
if (args.fPath->isEmpty()) {
return true;
}
if (!fAtlas) {
fAtlas = args.fResourceProvider->createAtlas(kAlpha_8_GrPixelConfig,
ATLAS_TEXTURE_WIDTH, ATLAS_TEXTURE_HEIGHT,
NUM_PLOTS_X, NUM_PLOTS_Y,
&GrAADistanceFieldPathRenderer::HandleEviction,
(void*)this);
if (!fAtlas) {
return false;
}
}
AADistanceFieldPathBatch::Geometry geometry(*args.fStroke);
geometry.fPath = *args.fPath;
geometry.fAntiAlias = args.fAntiAlias;
SkAutoTUnref<GrBatch> batch(AADistanceFieldPathBatch::Create(geometry, args.fColor,
*args.fViewMatrix, fAtlas,
&fPathCache, &fPathList));
args.fTarget->drawBatch(*args.fPipelineBuilder, batch);
return true;
}
///////////////////////////////////////////////////////////////////////////////////////////////////
#ifdef GR_TEST_UTILS
struct PathTestStruct {
typedef GrAADistanceFieldPathRenderer::PathCache PathCache;
typedef GrAADistanceFieldPathRenderer::PathData PathData;
typedef GrAADistanceFieldPathRenderer::PathDataList PathDataList;
PathTestStruct() : fContextID(SK_InvalidGenID), fAtlas(NULL) {}
~PathTestStruct() { this->reset(); }
void reset() {
PathDataList::Iter iter;
iter.init(fPathList, PathDataList::Iter::kHead_IterStart);
PathData* pathData;
while ((pathData = iter.get())) {
iter.next();
fPathList.remove(pathData);
SkDELETE(pathData);
}
SkDELETE(fAtlas);
fPathCache.reset();
}
static void HandleEviction(GrBatchAtlas::AtlasID id, void* pr) {
PathTestStruct* dfpr = (PathTestStruct*)pr;
// remove any paths that use this plot
PathDataList::Iter iter;
iter.init(dfpr->fPathList, PathDataList::Iter::kHead_IterStart);
PathData* pathData;
while ((pathData = iter.get())) {
iter.next();
if (id == pathData->fID) {
dfpr->fPathCache.remove(pathData->fKey);
dfpr->fPathList.remove(pathData);
SkDELETE(pathData);
}
}
}
uint32_t fContextID;
GrBatchAtlas* fAtlas;
PathCache fPathCache;
PathDataList fPathList;
};
BATCH_TEST_DEFINE(AADistanceFieldPathBatch) {
static PathTestStruct gTestStruct;
if (context->uniqueID() != gTestStruct.fContextID) {
gTestStruct.fContextID = context->uniqueID();
gTestStruct.reset();
gTestStruct.fAtlas =
context->resourceProvider()->createAtlas(kAlpha_8_GrPixelConfig,
ATLAS_TEXTURE_WIDTH, ATLAS_TEXTURE_HEIGHT,
NUM_PLOTS_X, NUM_PLOTS_Y,
&PathTestStruct::HandleEviction,
(void*)&gTestStruct);
}
SkMatrix viewMatrix = GrTest::TestMatrix(random);
GrColor color = GrRandomColor(random);
AADistanceFieldPathBatch::Geometry geometry(GrTest::TestStrokeRec(random));
geometry.fPath = GrTest::TestPath(random);
geometry.fAntiAlias = random->nextBool();
return AADistanceFieldPathBatch::Create(geometry, color, viewMatrix,
gTestStruct.fAtlas,
&gTestStruct.fPathCache,
&gTestStruct.fPathList);
}
#endif
|