1 /*
2 * Copyright 2011 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 #include "SkBlurMask.h"
9 #include "SkBlurMaskFilter.h"
10 #include "SkBlurDrawLooper.h"
11 #include "SkCanvas.h"
12 #include "SkColorFilter.h"
13 #include "SkEmbossMaskFilter.h"
14 #include "SkLayerDrawLooper.h"
15 #include "SkMaskFilterBase.h"
16 #include "SkMath.h"
17 #include "SkPaint.h"
18 #include "SkPath.h"
19 #include "SkPerlinNoiseShader.h"
20 #include "SkSurface.h"
21 #include "Test.h"
22
23 #if SK_SUPPORT_GPU
24 #include "GrContextFactory.h"
25 #include "SkGpuDevice.h"
26 #endif
27
28 #define WRITE_CSV 0
29
30 ///////////////////////////////////////////////////////////////////////////////
31
32 #define ILLEGAL_MODE ((SkXfermode::Mode)-1)
33
34 static const int outset = 100;
35 static const SkColor bgColor = SK_ColorWHITE;
36 static const int strokeWidth = 4;
37
create(SkBitmap * bm,const SkIRect & bound)38 static void create(SkBitmap* bm, const SkIRect& bound) {
39 bm->allocN32Pixels(bound.width(), bound.height());
40 }
41
drawBG(SkCanvas * canvas)42 static void drawBG(SkCanvas* canvas) {
43 canvas->drawColor(bgColor);
44 }
45
46
47 struct BlurTest {
48 void (*addPath)(SkPath*);
49 int viewLen;
50 SkIRect views[9];
51 };
52
53 //Path Draw Procs
54 //Beware that paths themselves my draw differently depending on the clip.
draw50x50Rect(SkPath * path)55 static void draw50x50Rect(SkPath* path) {
56 path->addRect(0, 0, SkIntToScalar(50), SkIntToScalar(50));
57 }
58
59 //Tests
60 static BlurTest tests[] = {
61 { draw50x50Rect, 3, {
62 //inner half of blur
63 { 0, 0, 50, 50 },
64 //blur, but no path.
65 { 50 + strokeWidth/2, 50 + strokeWidth/2, 100, 100 },
66 //just an edge
67 { 40, strokeWidth, 60, 50 - strokeWidth },
68 }},
69 };
70
71 /** Assumes that the ref draw was completely inside ref canvas --
72 implies that everything outside is "bgColor".
73 Checks that all overlap is the same and that all non-overlap on the
74 ref is "bgColor".
75 */
compare(const SkBitmap & ref,const SkIRect & iref,const SkBitmap & test,const SkIRect & itest)76 static bool compare(const SkBitmap& ref, const SkIRect& iref,
77 const SkBitmap& test, const SkIRect& itest)
78 {
79 const int xOff = itest.fLeft - iref.fLeft;
80 const int yOff = itest.fTop - iref.fTop;
81
82 for (int y = 0; y < test.height(); ++y) {
83 for (int x = 0; x < test.width(); ++x) {
84 SkColor testColor = test.getColor(x, y);
85 int refX = x + xOff;
86 int refY = y + yOff;
87 SkColor refColor;
88 if (refX >= 0 && refX < ref.width() &&
89 refY >= 0 && refY < ref.height())
90 {
91 refColor = ref.getColor(refX, refY);
92 } else {
93 refColor = bgColor;
94 }
95 if (refColor != testColor) {
96 return false;
97 }
98 }
99 }
100 return true;
101 }
102
DEF_TEST(BlurDrawing,reporter)103 DEF_TEST(BlurDrawing, reporter) {
104 SkPaint paint;
105 paint.setColor(SK_ColorGRAY);
106 paint.setStyle(SkPaint::kStroke_Style);
107 paint.setStrokeWidth(SkIntToScalar(strokeWidth));
108
109 SkScalar sigma = SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(5));
110 for (int style = 0; style <= kLastEnum_SkBlurStyle; ++style) {
111 SkBlurStyle blurStyle = static_cast<SkBlurStyle>(style);
112
113 const uint32_t flagPermutations = SkBlurMaskFilter::kAll_BlurFlag;
114 for (uint32_t flags = 0; flags < flagPermutations; ++flags) {
115 paint.setMaskFilter(SkBlurMaskFilter::Make(blurStyle, sigma, flags));
116
117 for (size_t test = 0; test < SK_ARRAY_COUNT(tests); ++test) {
118 SkPath path;
119 tests[test].addPath(&path);
120 SkPath strokedPath;
121 paint.getFillPath(path, &strokedPath);
122 SkRect refBound = strokedPath.getBounds();
123 SkIRect iref;
124 refBound.roundOut(&iref);
125 iref.inset(-outset, -outset);
126 SkBitmap refBitmap;
127 create(&refBitmap, iref);
128
129 SkCanvas refCanvas(refBitmap);
130 refCanvas.translate(SkIntToScalar(-iref.fLeft),
131 SkIntToScalar(-iref.fTop));
132 drawBG(&refCanvas);
133 refCanvas.drawPath(path, paint);
134
135 for (int view = 0; view < tests[test].viewLen; ++view) {
136 SkIRect itest = tests[test].views[view];
137 SkBitmap testBitmap;
138 create(&testBitmap, itest);
139
140 SkCanvas testCanvas(testBitmap);
141 testCanvas.translate(SkIntToScalar(-itest.fLeft),
142 SkIntToScalar(-itest.fTop));
143 drawBG(&testCanvas);
144 testCanvas.drawPath(path, paint);
145
146 REPORTER_ASSERT(reporter,
147 compare(refBitmap, iref, testBitmap, itest));
148 }
149 }
150 }
151 }
152 }
153
154 ///////////////////////////////////////////////////////////////////////////////
155
156 // Use SkBlurMask::BlurGroundTruth to blur a 'width' x 'height' solid
157 // white rect. Return the right half of the middle row in 'result'.
ground_truth_2d(int width,int height,SkScalar sigma,int * result,int resultCount)158 static void ground_truth_2d(int width, int height,
159 SkScalar sigma,
160 int* result, int resultCount) {
161 SkMask src, dst;
162
163 src.fBounds.set(0, 0, width, height);
164 src.fFormat = SkMask::kA8_Format;
165 src.fRowBytes = src.fBounds.width();
166 src.fImage = SkMask::AllocImage(src.computeTotalImageSize());
167
168 memset(src.fImage, 0xff, src.computeTotalImageSize());
169
170 if (!SkBlurMask::BlurGroundTruth(sigma, &dst, src, kNormal_SkBlurStyle)) {
171 return;
172 }
173
174 int midX = dst.fBounds.centerX();
175 int midY = dst.fBounds.centerY();
176 uint8_t* bytes = dst.getAddr8(midX, midY);
177 int i;
178 for (i = 0; i < dst.fBounds.width()-(midX-dst.fBounds.fLeft); ++i) {
179 if (i < resultCount) {
180 result[i] = bytes[i];
181 }
182 }
183 for ( ; i < resultCount; ++i) {
184 result[i] = 0;
185 }
186
187 SkMask::FreeImage(src.fImage);
188 SkMask::FreeImage(dst.fImage);
189 }
190
191 // Implement a step function that is 255 between min and max; 0 elsewhere.
step(int x,SkScalar min,SkScalar max)192 static int step(int x, SkScalar min, SkScalar max) {
193 if (min < x && x < max) {
194 return 255;
195 }
196 return 0;
197 }
198
199 // Implement a Gaussian function with 0 mean and std.dev. of 'sigma'.
gaussian(int x,SkScalar sigma)200 static float gaussian(int x, SkScalar sigma) {
201 float k = SK_Scalar1/(sigma * sqrtf(2.0f*SK_ScalarPI));
202 float exponent = -(x * x) / (2 * sigma * sigma);
203 return k * expf(exponent);
204 }
205
206 // Perform a brute force convolution of a step function with a Gaussian.
207 // Return the right half in 'result'
brute_force_1d(SkScalar stepMin,SkScalar stepMax,SkScalar gaussianSigma,int * result,int resultCount)208 static void brute_force_1d(SkScalar stepMin, SkScalar stepMax,
209 SkScalar gaussianSigma,
210 int* result, int resultCount) {
211
212 int gaussianRange = SkScalarCeilToInt(10 * gaussianSigma);
213
214 for (int i = 0; i < resultCount; ++i) {
215 SkScalar sum = 0.0f;
216 for (int j = -gaussianRange; j < gaussianRange; ++j) {
217 sum += gaussian(j, gaussianSigma) * step(i-j, stepMin, stepMax);
218 }
219
220 result[i] = SkClampMax(SkClampPos(int(sum + 0.5f)), 255);
221 }
222 }
223
blur_path(SkCanvas * canvas,const SkPath & path,SkScalar gaussianSigma)224 static void blur_path(SkCanvas* canvas, const SkPath& path,
225 SkScalar gaussianSigma) {
226
227 SkScalar midX = path.getBounds().centerX();
228 SkScalar midY = path.getBounds().centerY();
229
230 canvas->translate(-midX, -midY);
231
232 SkPaint blurPaint;
233 blurPaint.setColor(SK_ColorWHITE);
234 blurPaint.setMaskFilter(SkBlurMaskFilter::Make(kNormal_SkBlurStyle, gaussianSigma,
235 SkBlurMaskFilter::kHighQuality_BlurFlag));
236
237 canvas->drawColor(SK_ColorBLACK);
238 canvas->drawPath(path, blurPaint);
239 }
240
241 // Readback the blurred draw results from the canvas
readback(const SkBitmap & src,int * result,int resultCount)242 static void readback(const SkBitmap& src, int* result, int resultCount) {
243 SkBitmap readback;
244 readback.allocN32Pixels(resultCount, 30);
245 SkPixmap pm;
246 readback.peekPixels(&pm);
247 src.readPixels(pm, 0, 0);
248
249 const SkPMColor* pixels = pm.addr32(0, 15);
250
251 for (int i = 0; i < resultCount; ++i) {
252 result[i] = SkColorGetR(pixels[i]);
253 }
254 }
255
256 // Draw a blurred version of the provided path.
257 // Return the right half of the middle row in 'result'.
cpu_blur_path(const SkPath & path,SkScalar gaussianSigma,int * result,int resultCount)258 static void cpu_blur_path(const SkPath& path, SkScalar gaussianSigma,
259 int* result, int resultCount) {
260
261 SkBitmap bitmap;
262 bitmap.allocN32Pixels(resultCount, 30);
263 SkCanvas canvas(bitmap);
264
265 blur_path(&canvas, path, gaussianSigma);
266 readback(bitmap, result, resultCount);
267 }
268
269 #if WRITE_CSV
write_as_csv(const char * label,SkScalar scale,int * data,int count)270 static void write_as_csv(const char* label, SkScalar scale, int* data, int count) {
271 SkDebugf("%s_%.2f,", label, scale);
272 for (int i = 0; i < count-1; ++i) {
273 SkDebugf("%d,", data[i]);
274 }
275 SkDebugf("%d\n", data[count-1]);
276 }
277 #endif
278
match(int * first,int * second,int count,int tol)279 static bool match(int* first, int* second, int count, int tol) {
280 int delta;
281 for (int i = 0; i < count; ++i) {
282 delta = first[i] - second[i];
283 if (delta > tol || delta < -tol) {
284 return false;
285 }
286 }
287
288 return true;
289 }
290
291 // Test out the normal blur style with a wide range of sigmas
DEF_TEST(BlurSigmaRange,reporter)292 DEF_TEST(BlurSigmaRange, reporter) {
293 static const int kSize = 100;
294
295 // The geometry is offset a smidge to trigger:
296 // https://code.google.com/p/chromium/issues/detail?id=282418
297 SkPath rectPath;
298 rectPath.addRect(0.3f, 0.3f, 100.3f, 100.3f);
299
300 SkPoint polyPts[] = {
301 { 0.3f, 0.3f },
302 { 100.3f, 0.3f },
303 { 100.3f, 100.3f },
304 { 0.3f, 100.3f },
305 { 2.3f, 50.3f } // a little divet to throw off the rect special case
306 };
307 SkPath polyPath;
308 polyPath.addPoly(polyPts, SK_ARRAY_COUNT(polyPts), true);
309
310 int rectSpecialCaseResult[kSize];
311 int generalCaseResult[kSize];
312 int groundTruthResult[kSize];
313 int bruteForce1DResult[kSize];
314
315 SkScalar sigma = 10.0f;
316
317 for (int i = 0; i < 4; ++i, sigma /= 10) {
318
319 cpu_blur_path(rectPath, sigma, rectSpecialCaseResult, kSize);
320 cpu_blur_path(polyPath, sigma, generalCaseResult, kSize);
321
322 ground_truth_2d(100, 100, sigma, groundTruthResult, kSize);
323 brute_force_1d(-50.0f, 50.0f, sigma, bruteForce1DResult, kSize);
324
325 REPORTER_ASSERT(reporter, match(rectSpecialCaseResult, bruteForce1DResult, kSize, 5));
326 REPORTER_ASSERT(reporter, match(generalCaseResult, bruteForce1DResult, kSize, 15));
327 REPORTER_ASSERT(reporter, match(groundTruthResult, bruteForce1DResult, kSize, 1));
328
329 #if WRITE_CSV
330 write_as_csv("RectSpecialCase", sigma, rectSpecialCaseResult, kSize);
331 write_as_csv("GeneralCase", sigma, generalCaseResult, kSize);
332 #if SK_SUPPORT_GPU
333 write_as_csv("GPU", sigma, gpuResult, kSize);
334 #endif
335 write_as_csv("GroundTruth2D", sigma, groundTruthResult, kSize);
336 write_as_csv("BruteForce1D", sigma, bruteForce1DResult, kSize);
337 #endif
338 }
339 }
340
341 ///////////////////////////////////////////////////////////////////////////////////////////
342
blurMaskFilterFlags_as_quality(uint32_t blurMaskFilterFlags)343 static SkBlurQuality blurMaskFilterFlags_as_quality(uint32_t blurMaskFilterFlags) {
344 return (blurMaskFilterFlags & SkBlurMaskFilter::kHighQuality_BlurFlag) ?
345 kHigh_SkBlurQuality : kLow_SkBlurQuality;
346 }
347
test_blurDrawLooper(skiatest::Reporter * reporter,SkScalar sigma,SkBlurStyle style,uint32_t blurMaskFilterFlags)348 static void test_blurDrawLooper(skiatest::Reporter* reporter, SkScalar sigma,
349 SkBlurStyle style, uint32_t blurMaskFilterFlags) {
350 if (kNormal_SkBlurStyle != style) {
351 return; // blurdrawlooper only supports normal
352 }
353
354 const SkColor color = 0xFF335577;
355 const SkScalar dx = 10;
356 const SkScalar dy = -5;
357 sk_sp<SkDrawLooper> lp(SkBlurDrawLooper::Make(color, sigma, dx, dy));
358 const bool expectSuccess = sigma > 0;
359
360 if (nullptr == lp) {
361 REPORTER_ASSERT(reporter, sigma <= 0);
362 } else {
363 SkDrawLooper::BlurShadowRec rec;
364 bool success = lp->asABlurShadow(&rec);
365 REPORTER_ASSERT(reporter, success == expectSuccess);
366 if (success) {
367 REPORTER_ASSERT(reporter, rec.fSigma == sigma);
368 REPORTER_ASSERT(reporter, rec.fOffset.x() == dx);
369 REPORTER_ASSERT(reporter, rec.fOffset.y() == dy);
370 REPORTER_ASSERT(reporter, rec.fColor == color);
371 REPORTER_ASSERT(reporter, rec.fStyle == style);
372 REPORTER_ASSERT(reporter, rec.fQuality == kLow_SkBlurQuality);
373 }
374 }
375 }
376
test_looper(skiatest::Reporter * reporter,sk_sp<SkDrawLooper> lp,SkScalar sigma,SkBlurStyle style,SkBlurQuality quality,bool expectSuccess)377 static void test_looper(skiatest::Reporter* reporter, sk_sp<SkDrawLooper> lp, SkScalar sigma,
378 SkBlurStyle style, SkBlurQuality quality, bool expectSuccess) {
379 SkDrawLooper::BlurShadowRec rec;
380 bool success = lp->asABlurShadow(&rec);
381 REPORTER_ASSERT(reporter, success == expectSuccess);
382 if (success != expectSuccess) {
383 lp->asABlurShadow(&rec);
384 }
385 if (success) {
386 REPORTER_ASSERT(reporter, rec.fSigma == sigma);
387 REPORTER_ASSERT(reporter, rec.fStyle == style);
388 REPORTER_ASSERT(reporter, rec.fQuality == quality);
389 }
390 }
391
make_noop_layer(SkLayerDrawLooper::Builder * builder)392 static void make_noop_layer(SkLayerDrawLooper::Builder* builder) {
393 SkLayerDrawLooper::LayerInfo info;
394
395 info.fPaintBits = 0;
396 info.fColorMode = SkBlendMode::kDst;
397 builder->addLayer(info);
398 }
399
make_blur_layer(SkLayerDrawLooper::Builder * builder,sk_sp<SkMaskFilter> mf)400 static void make_blur_layer(SkLayerDrawLooper::Builder* builder, sk_sp<SkMaskFilter> mf) {
401 SkLayerDrawLooper::LayerInfo info;
402
403 info.fPaintBits = SkLayerDrawLooper::kMaskFilter_Bit;
404 info.fColorMode = SkBlendMode::kSrc;
405 SkPaint* paint = builder->addLayer(info);
406 paint->setMaskFilter(std::move(mf));
407 }
408
test_layerDrawLooper(skiatest::Reporter * reporter,sk_sp<SkMaskFilter> mf,SkScalar sigma,SkBlurStyle style,SkBlurQuality quality,bool expectSuccess)409 static void test_layerDrawLooper(skiatest::Reporter* reporter, sk_sp<SkMaskFilter> mf,
410 SkScalar sigma, SkBlurStyle style, SkBlurQuality quality,
411 bool expectSuccess) {
412
413 SkLayerDrawLooper::LayerInfo info;
414 SkLayerDrawLooper::Builder builder;
415
416 // 1 layer is too few
417 make_noop_layer(&builder);
418 test_looper(reporter, builder.detach(), sigma, style, quality, false);
419
420 // 2 layers is good, but need blur
421 make_noop_layer(&builder);
422 make_noop_layer(&builder);
423 test_looper(reporter, builder.detach(), sigma, style, quality, false);
424
425 // 2 layers is just right
426 make_noop_layer(&builder);
427 make_blur_layer(&builder, mf);
428 test_looper(reporter, builder.detach(), sigma, style, quality, expectSuccess);
429
430 // 3 layers is too many
431 make_noop_layer(&builder);
432 make_blur_layer(&builder, mf);
433 make_noop_layer(&builder);
434 test_looper(reporter, builder.detach(), sigma, style, quality, false);
435 }
436
DEF_TEST(BlurAsABlur,reporter)437 DEF_TEST(BlurAsABlur, reporter) {
438 const SkBlurStyle styles[] = {
439 kNormal_SkBlurStyle, kSolid_SkBlurStyle, kOuter_SkBlurStyle, kInner_SkBlurStyle
440 };
441 const SkScalar sigmas[] = {
442 // values <= 0 should not success for a blur
443 -1, 0, 0.5f, 2
444 };
445
446 // Test asABlur for SkBlurMaskFilter
447 //
448 for (size_t i = 0; i < SK_ARRAY_COUNT(styles); ++i) {
449 const SkBlurStyle style = styles[i];
450 for (size_t j = 0; j < SK_ARRAY_COUNT(sigmas); ++j) {
451 const SkScalar sigma = sigmas[j];
452 for (int flags = 0; flags <= SkBlurMaskFilter::kAll_BlurFlag; ++flags) {
453 const SkBlurQuality quality = blurMaskFilterFlags_as_quality(flags);
454
455 sk_sp<SkMaskFilter> mf(SkBlurMaskFilter::Make(style, sigma, flags));
456 if (nullptr == mf.get()) {
457 REPORTER_ASSERT(reporter, sigma <= 0);
458 } else {
459 REPORTER_ASSERT(reporter, sigma > 0);
460 SkMaskFilterBase::BlurRec rec;
461 bool success = as_MFB(mf)->asABlur(&rec);
462 if (flags & SkBlurMaskFilter::kIgnoreTransform_BlurFlag) {
463 REPORTER_ASSERT(reporter, !success);
464 } else {
465 REPORTER_ASSERT(reporter, success);
466 REPORTER_ASSERT(reporter, rec.fSigma == sigma);
467 REPORTER_ASSERT(reporter, rec.fStyle == style);
468 REPORTER_ASSERT(reporter, rec.fQuality == quality);
469 }
470 test_layerDrawLooper(reporter, std::move(mf), sigma, style, quality, success);
471 }
472 test_blurDrawLooper(reporter, sigma, style, flags);
473 }
474 }
475 }
476
477 // Test asABlur for SkEmbossMaskFilter -- should never succeed
478 //
479 {
480 SkEmbossMaskFilter::Light light = {
481 { 1, 1, 1 }, 0, 127, 127
482 };
483 for (size_t j = 0; j < SK_ARRAY_COUNT(sigmas); ++j) {
484 const SkScalar sigma = sigmas[j];
485 auto mf(SkEmbossMaskFilter::Make(sigma, light));
486 if (mf) {
487 SkMaskFilterBase::BlurRec rec;
488 bool success = as_MFB(mf)->asABlur(&rec);
489 REPORTER_ASSERT(reporter, !success);
490 }
491 }
492 }
493 }
494
495 #if SK_SUPPORT_GPU
496
497 // This exercises the problem discovered in crbug.com/570232. The return value from
498 // SkBlurMask::BoxBlur wasn't being checked in SkBlurMaskFilter.cpp::GrRRectBlurEffect::Create
DEF_GPUTEST_FOR_RENDERING_CONTEXTS(SmallBoxBlurBug,reporter,ctxInfo)499 DEF_GPUTEST_FOR_RENDERING_CONTEXTS(SmallBoxBlurBug, reporter, ctxInfo) {
500
501 SkImageInfo info = SkImageInfo::MakeN32Premul(128, 128);
502 auto surface(SkSurface::MakeRenderTarget(ctxInfo.grContext(), SkBudgeted::kNo, info));
503 SkCanvas* canvas = surface->getCanvas();
504
505 SkRect r = SkRect::MakeXYWH(10, 10, 100, 100);
506 SkRRect rr = SkRRect::MakeRectXY(r, 10, 10);
507
508 SkPaint p;
509 p.setMaskFilter(SkBlurMaskFilter::Make(kNormal_SkBlurStyle, 0.01f));
510
511 canvas->drawRRect(rr, p);
512 }
513
514 #endif
515
516
DEF_TEST(BlurredRRectNinePatchComputation,reporter)517 DEF_TEST(BlurredRRectNinePatchComputation, reporter) {
518 const SkRect r = SkRect::MakeXYWH(10, 10, 100, 100);
519 static const SkScalar kBlurRad = 3.0f;
520
521 bool ninePatchable;
522 SkRRect rrectToDraw;
523 SkISize size;
524 SkScalar rectXs[SkBlurMaskFilter::kMaxDivisions], rectYs[SkBlurMaskFilter::kMaxDivisions];
525 SkScalar texXs[SkBlurMaskFilter::kMaxDivisions], texYs[SkBlurMaskFilter::kMaxDivisions];
526 int numX, numY;
527 uint32_t skipMask;
528
529 // not nine-patchable
530 {
531 SkVector radii[4] = { { 100, 100 }, { 0, 0 }, { 100, 100 }, { 0, 0 } };
532
533 SkRRect rr;
534 rr.setRectRadii(r, radii);
535
536 ninePatchable = SkBlurMaskFilter::ComputeBlurredRRectParams(rr, rr, SkRect::MakeEmpty(),
537 kBlurRad, kBlurRad,
538 &rrectToDraw, &size,
539 rectXs, rectYs, texXs, texYs,
540 &numX, &numY, &skipMask);
541 REPORTER_ASSERT(reporter, !ninePatchable);
542 }
543
544 // simple circular
545 {
546 static const SkScalar kCornerRad = 10.0f;
547 SkRRect rr;
548 rr.setRectXY(r, kCornerRad, kCornerRad);
549
550 ninePatchable = SkBlurMaskFilter::ComputeBlurredRRectParams(rr, rr, SkRect::MakeEmpty(),
551 kBlurRad, kBlurRad,
552 &rrectToDraw, &size,
553 rectXs, rectYs, texXs, texYs,
554 &numX, &numY, &skipMask);
555
556 static const SkScalar kAns = 12.0f * kBlurRad + 2.0f * kCornerRad + 1.0f;
557 REPORTER_ASSERT(reporter, ninePatchable);
558 REPORTER_ASSERT(reporter, SkScalarNearlyEqual(SkIntToScalar(size.fWidth), kAns));
559 REPORTER_ASSERT(reporter, SkScalarNearlyEqual(SkIntToScalar(size.fHeight), kAns));
560 REPORTER_ASSERT(reporter, 4 == numX && 4 == numY);
561 REPORTER_ASSERT(reporter, !skipMask);
562 }
563
564 // simple elliptical
565 {
566 static const SkScalar kXCornerRad = 2.0f;
567 static const SkScalar kYCornerRad = 10.0f;
568 SkRRect rr;
569 rr.setRectXY(r, kXCornerRad, kYCornerRad);
570
571 ninePatchable = SkBlurMaskFilter::ComputeBlurredRRectParams(rr, rr, SkRect::MakeEmpty(),
572 kBlurRad, kBlurRad,
573 &rrectToDraw, &size,
574 rectXs, rectYs, texXs, texYs,
575 &numX, &numY, &skipMask);
576
577 static const SkScalar kXAns = 12.0f * kBlurRad + 2.0f * kXCornerRad + 1.0f;
578 static const SkScalar kYAns = 12.0f * kBlurRad + 2.0f * kYCornerRad + 1.0f;
579
580 REPORTER_ASSERT(reporter, ninePatchable);
581 REPORTER_ASSERT(reporter, SkScalarNearlyEqual(SkIntToScalar(size.fWidth), kXAns));
582 REPORTER_ASSERT(reporter, SkScalarNearlyEqual(SkIntToScalar(size.fHeight), kYAns));
583 REPORTER_ASSERT(reporter, 4 == numX && 4 == numY);
584 REPORTER_ASSERT(reporter, !skipMask);
585 }
586
587 // test-out occlusion
588 {
589 static const SkScalar kCornerRad = 10.0f;
590 SkRRect rr;
591 rr.setRectXY(r, kCornerRad, kCornerRad);
592
593 // The rectXs & rectYs should be { 1, 29, 91, 119 }. Add two more points around each.
594 SkScalar testLocs[] = {
595 -18.0f, -9.0f,
596 1.0f,
597 9.0f, 18.0f,
598 29.0f,
599 39.0f, 49.0f,
600 91.0f,
601 109.0f, 118.0f,
602 119.0f,
603 139.0f, 149.0f
604 };
605
606 for (int minY = 0; minY < (int)SK_ARRAY_COUNT(testLocs); ++minY) {
607 for (int maxY = minY+1; maxY < (int)SK_ARRAY_COUNT(testLocs); ++maxY) {
608 for (int minX = 0; minX < (int)SK_ARRAY_COUNT(testLocs); ++minX) {
609 for (int maxX = minX+1; maxX < (int)SK_ARRAY_COUNT(testLocs); ++maxX) {
610 SkRect occluder = SkRect::MakeLTRB(testLocs[minX], testLocs[minY],
611 testLocs[maxX], testLocs[maxY]);
612 if (occluder.isEmpty()) {
613 continue;
614 }
615
616 ninePatchable = SkBlurMaskFilter::ComputeBlurredRRectParams(
617 rr, rr, occluder,
618 kBlurRad, kBlurRad,
619 &rrectToDraw, &size,
620 rectXs, rectYs, texXs, texYs,
621 &numX, &numY, &skipMask);
622
623 static const SkScalar kAns = 12.0f * kBlurRad + 2.0f * kCornerRad + 1.0f;
624 REPORTER_ASSERT(reporter, ninePatchable);
625 REPORTER_ASSERT(reporter,
626 SkScalarNearlyEqual(SkIntToScalar(size.fWidth), kAns));
627 REPORTER_ASSERT(reporter,
628 SkScalarNearlyEqual(SkIntToScalar(size.fHeight), kAns));
629
630 int checkBit = 0x1;
631 for (int y = 0; y < numY-1; ++y) {
632 for (int x = 0; x < numX-1; ++x) {
633 SkRect cell = SkRect::MakeLTRB(rectXs[x], rectYs[y],
634 rectXs[x+1], rectYs[y+1]);
635 REPORTER_ASSERT(reporter,
636 SkToBool(skipMask & checkBit) ==
637 (cell.isEmpty() || occluder.contains(cell)));
638
639 REPORTER_ASSERT(reporter, texXs[x] >= 0 &&
640 texXs[x] <= size.fWidth);
641 REPORTER_ASSERT(reporter, texYs[y] >= 0 &&
642 texXs[y] <= size.fHeight);
643
644 checkBit <<= 1;
645 }
646 }
647 }
648 }
649 }
650 }
651
652
653 }
654
655 }
656
657 // https://crbugs.com/787712
DEF_TEST(EmbossPerlinCrash,reporter)658 DEF_TEST(EmbossPerlinCrash, reporter) {
659 SkPaint p;
660
661 static constexpr SkEmbossMaskFilter::Light light = {
662 { 1, 1, 1 }, 0, 127, 127
663 };
664 p.setMaskFilter(SkEmbossMaskFilter::Make(1, light));
665 p.setShader(SkPerlinNoiseShader::MakeFractalNoise(1.0f, 1.0f, 2, 0.0f));
666
667 sk_sp<SkSurface> surface = SkSurface::MakeRasterN32Premul(100, 100);
668 surface->getCanvas()->drawPaint(p);
669 }
670
671 ///////////////////////////////////////////////////////////////////////////////////////////
672