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 38 static void create(SkBitmap* bm, const SkIRect& bound) { 39 bm->allocN32Pixels(bound.width(), bound.height()); 40 } 41 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. 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 */ 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 } 102 103 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'. 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. 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'. 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' 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 } 223 224 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 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'. 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 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 278 279 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 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 /////////////////////////////////////////////////////////////////////////////////////////// 342 343 static SkBlurQuality blurMaskFilterFlags_as_quality(uint32_t blurMaskFilterFlags) { 344 return (blurMaskFilterFlags & SkBlurMaskFilter::kHighQuality_BlurFlag) ? 345 kHigh_SkBlurQuality : kLow_SkBlurQuality; 346 } 347 348 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 } 376 377 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 } 391 392 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 } 399 400 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 } 408 409 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 } 436 437 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 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 515 516 517 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 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
