1/* 2 * Copyright 2013 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#include "SampleCode.h" 8#include "SkAlphaThresholdFilter.h" 9#include "SkBitmapSource.h" 10#include "SkBlurImageFilter.h" 11#include "SkCanvas.h" 12#include "SkColorCubeFilter.h" 13#include "SkColorFilter.h" 14#include "SkColorFilterImageFilter.h" 15#include "SkComposeImageFilter.h" 16#include "SkData.h" 17#include "SkDisplacementMapEffect.h" 18#include "SkDropShadowImageFilter.h" 19#include "SkFlattenableSerialization.h" 20#include "SkLightingImageFilter.h" 21#include "SkMagnifierImageFilter.h" 22#include "SkMatrixConvolutionImageFilter.h" 23#include "SkMergeImageFilter.h" 24#include "SkMorphologyImageFilter.h" 25#include "SkOffsetImageFilter.h" 26#include "SkPerlinNoiseShader.h" 27#include "SkPictureImageFilter.h" 28#include "SkPictureRecorder.h" 29#include "SkRandom.h" 30#include "SkRectShaderImageFilter.h" 31#include "SkTestImageFilters.h" 32#include "SkTileImageFilter.h" 33#include "SkView.h" 34#include "SkXfermodeImageFilter.h" 35#include <stdio.h> 36#include <time.h> 37 38//#define SK_ADD_RANDOM_BIT_FLIPS 39//#define SK_FUZZER_IS_VERBOSE 40 41static const uint32_t kSeed = (uint32_t)(time(NULL)); 42static SkRandom gRand(kSeed); 43static bool return_large = false; 44static bool return_undef = false; 45 46static const int kBitmapSize = 24; 47 48static int R(float x) { 49 return (int)floor(SkScalarToFloat(gRand.nextUScalar1()) * x); 50} 51 52#if defined _WIN32 53#pragma warning ( push ) 54// we are intentionally causing an overflow here 55// (warning C4756: overflow in constant arithmetic) 56#pragma warning ( disable : 4756 ) 57#endif 58 59static float huge() { 60 double d = 1e100; 61 float f = (float)d; 62 return f; 63} 64 65#if defined _WIN32 66#pragma warning ( pop ) 67#endif 68 69static float make_number(bool positiveOnly) { 70 float f = positiveOnly ? 1.0f : 0.0f; 71 float v = f; 72 int sel; 73 74 if (return_large) sel = R(6); else sel = R(4); 75 if (!return_undef && sel == 0) sel = 1; 76 77 if (R(2) == 1) v = (float)(R(100)+f); else 78 79 switch (sel) { 80 case 0: break; 81 case 1: v = f; break; 82 case 2: v = 0.000001f; break; 83 case 3: v = 10000.0f; break; 84 case 4: v = 2000000000.0f; break; 85 case 5: v = huge(); break; 86 } 87 88 if (!positiveOnly && (R(4) == 1)) v = -v; 89 return v; 90} 91 92static SkScalar make_scalar(bool positiveOnly = false) { 93 return make_number(positiveOnly); 94} 95 96static SkRect make_rect() { 97 return SkRect::MakeWH(SkIntToScalar(R(static_cast<float>(kBitmapSize))), 98 SkIntToScalar(R(static_cast<float>(kBitmapSize)))); 99} 100 101static SkRegion make_region() { 102 SkIRect iRegion = SkIRect::MakeXYWH(R(static_cast<float>(kBitmapSize)), 103 R(static_cast<float>(kBitmapSize)), 104 R(static_cast<float>(kBitmapSize)), 105 R(static_cast<float>(kBitmapSize))); 106 return SkRegion(iRegion); 107} 108 109static SkMatrix make_matrix() { 110 SkMatrix m; 111 for (int i = 0; i < 9; ++i) { 112 m[i] = make_scalar(); 113 } 114 return m; 115} 116 117static SkXfermode::Mode make_xfermode() { 118 return static_cast<SkXfermode::Mode>(R(SkXfermode::kLastMode+1)); 119} 120 121static SkColor make_color() { 122 return (R(2) == 1) ? 0xFFC0F0A0 : 0xFF000090; 123} 124 125static SkDropShadowImageFilter::ShadowMode make_shadow_mode() { 126 return (R(2) == 1) ? SkDropShadowImageFilter::kDrawShadowAndForeground_ShadowMode : 127 SkDropShadowImageFilter::kDrawShadowOnly_ShadowMode; 128} 129 130static SkPoint3 make_point() { 131 return SkPoint3(make_scalar(), make_scalar(), make_scalar(true)); 132} 133 134static SkDisplacementMapEffect::ChannelSelectorType make_channel_selector_type() { 135 return static_cast<SkDisplacementMapEffect::ChannelSelectorType>(R(4)+1); 136} 137 138static bool valid_for_raster_canvas(const SkImageInfo& info) { 139 switch (info.colorType()) { 140 case kAlpha_8_SkColorType: 141 case kRGB_565_SkColorType: 142 return true; 143 case kN32_SkColorType: 144 return kPremul_SkAlphaType == info.alphaType() || 145 kOpaque_SkAlphaType == info.alphaType(); 146 default: 147 break; 148 } 149 return false; 150} 151 152static SkColorType rand_colortype() { 153 return (SkColorType)R(kLastEnum_SkColorType + 1); 154} 155 156static void rand_bitmap_for_canvas(SkBitmap* bitmap) { 157 SkImageInfo info; 158 do { 159 info = SkImageInfo::Make(kBitmapSize, kBitmapSize, rand_colortype(), 160 kPremul_SkAlphaType); 161 } while (!valid_for_raster_canvas(info) || !bitmap->tryAllocPixels(info)); 162} 163 164static void make_g_bitmap(SkBitmap& bitmap) { 165 rand_bitmap_for_canvas(&bitmap); 166 167 SkCanvas canvas(bitmap); 168 canvas.clear(0x00000000); 169 SkPaint paint; 170 paint.setAntiAlias(true); 171 paint.setColor(0xFF884422); 172 paint.setTextSize(SkIntToScalar(kBitmapSize/2)); 173 const char* str = "g"; 174 canvas.drawText(str, strlen(str), SkIntToScalar(kBitmapSize/8), 175 SkIntToScalar(kBitmapSize/4), paint); 176} 177 178static void make_checkerboard_bitmap(SkBitmap& bitmap) { 179 rand_bitmap_for_canvas(&bitmap); 180 181 SkCanvas canvas(bitmap); 182 canvas.clear(0x00000000); 183 SkPaint darkPaint; 184 darkPaint.setColor(0xFF804020); 185 SkPaint lightPaint; 186 lightPaint.setColor(0xFF244484); 187 const int i = kBitmapSize / 8; 188 const SkScalar f = SkIntToScalar(i); 189 for (int y = 0; y < kBitmapSize; y += i) { 190 for (int x = 0; x < kBitmapSize; x += i) { 191 canvas.save(); 192 canvas.translate(SkIntToScalar(x), SkIntToScalar(y)); 193 canvas.drawRect(SkRect::MakeXYWH(0, 0, f, f), darkPaint); 194 canvas.drawRect(SkRect::MakeXYWH(f, 0, f, f), lightPaint); 195 canvas.drawRect(SkRect::MakeXYWH(0, f, f, f), lightPaint); 196 canvas.drawRect(SkRect::MakeXYWH(f, f, f, f), darkPaint); 197 canvas.restore(); 198 } 199 } 200} 201 202static const SkBitmap& make_bitmap() { 203 static SkBitmap bitmap[2]; 204 static bool initialized = false; 205 if (!initialized) { 206 make_g_bitmap(bitmap[0]); 207 make_checkerboard_bitmap(bitmap[1]); 208 initialized = true; 209 } 210 return bitmap[R(2)]; 211} 212 213static SkData* make_3Dlut(int* cubeDimension, bool invR, bool invG, bool invB) { 214 int size = 4 << R(5); 215 SkData* data = SkData::NewUninitialized(sizeof(SkColor) * size * size * size); 216 SkColor* pixels = (SkColor*)(data->writable_data()); 217 SkAutoMalloc lutMemory(size); 218 SkAutoMalloc invLutMemory(size); 219 uint8_t* lut = (uint8_t*)lutMemory.get(); 220 uint8_t* invLut = (uint8_t*)invLutMemory.get(); 221 const int maxIndex = size - 1; 222 for (int i = 0; i < size; i++) { 223 lut[i] = (i * 255) / maxIndex; 224 invLut[i] = ((maxIndex - i) * 255) / maxIndex; 225 } 226 for (int r = 0; r < size; ++r) { 227 for (int g = 0; g < size; ++g) { 228 for (int b = 0; b < size; ++b) { 229 pixels[(size * ((size * b) + g)) + r] = SkColorSetARGB(0xFF, 230 invR ? invLut[r] : lut[r], 231 invG ? invLut[g] : lut[g], 232 invB ? invLut[b] : lut[b]); 233 } 234 } 235 } 236 if (cubeDimension) { 237 *cubeDimension = size; 238 } 239 return data; 240} 241 242static void drawSomething(SkCanvas* canvas) { 243 SkPaint paint; 244 245 canvas->save(); 246 canvas->scale(0.5f, 0.5f); 247 canvas->drawBitmap(make_bitmap(), 0, 0, NULL); 248 canvas->restore(); 249 250 paint.setAntiAlias(true); 251 252 paint.setColor(SK_ColorRED); 253 canvas->drawCircle(SkIntToScalar(kBitmapSize/2), SkIntToScalar(kBitmapSize/2), SkIntToScalar(kBitmapSize/3), paint); 254 paint.setColor(SK_ColorBLACK); 255 paint.setTextSize(SkIntToScalar(kBitmapSize/3)); 256 canvas->drawText("Picture", 7, SkIntToScalar(kBitmapSize/2), SkIntToScalar(kBitmapSize/4), paint); 257} 258 259static SkImageFilter* make_image_filter(bool canBeNull = true) { 260 SkImageFilter* filter = 0; 261 262 // Add a 1 in 3 chance to get a NULL input 263 if (canBeNull && (R(3) == 1)) { return filter; } 264 265 enum { ALPHA_THRESHOLD, MERGE, COLOR, LUT3D, BLUR, MAGNIFIER, 266 DOWN_SAMPLE, XFERMODE, OFFSET, MATRIX, MATRIX_CONVOLUTION, COMPOSE, 267 DISTANT_LIGHT, POINT_LIGHT, SPOT_LIGHT, NOISE, DROP_SHADOW, 268 MORPHOLOGY, BITMAP, DISPLACE, TILE, PICTURE, NUM_FILTERS }; 269 270 switch (R(NUM_FILTERS)) { 271 case ALPHA_THRESHOLD: 272 filter = SkAlphaThresholdFilter::Create(make_region(), make_scalar(), make_scalar()); 273 break; 274 case MERGE: 275 filter = SkMergeImageFilter::Create(make_image_filter(), make_image_filter(), make_xfermode()); 276 break; 277 case COLOR: 278 { 279 SkAutoTUnref<SkColorFilter> cf((R(2) == 1) ? 280 SkColorFilter::CreateModeFilter(make_color(), make_xfermode()) : 281 SkColorFilter::CreateLightingFilter(make_color(), make_color())); 282 filter = cf.get() ? SkColorFilterImageFilter::Create(cf, make_image_filter()) : 0; 283 } 284 break; 285 case LUT3D: 286 { 287 int cubeDimension; 288 SkAutoDataUnref lut3D(make_3Dlut(&cubeDimension, (R(2) == 1), (R(2) == 1), (R(2) == 1))); 289 SkAutoTUnref<SkColorFilter> cf(SkColorCubeFilter::Create(lut3D, cubeDimension)); 290 filter = cf.get() ? SkColorFilterImageFilter::Create(cf, make_image_filter()) : 0; 291 } 292 break; 293 case BLUR: 294 filter = SkBlurImageFilter::Create(make_scalar(true), make_scalar(true), make_image_filter()); 295 break; 296 case MAGNIFIER: 297 filter = SkMagnifierImageFilter::Create(make_rect(), make_scalar(true)); 298 break; 299 case DOWN_SAMPLE: 300 filter = SkDownSampleImageFilter::Create(make_scalar()); 301 break; 302 case XFERMODE: 303 { 304 SkAutoTUnref<SkXfermode> mode(SkXfermode::Create(make_xfermode())); 305 filter = SkXfermodeImageFilter::Create(mode, make_image_filter(), make_image_filter()); 306 } 307 break; 308 case OFFSET: 309 filter = SkOffsetImageFilter::Create(make_scalar(), make_scalar(), make_image_filter()); 310 break; 311 case MATRIX: 312 filter = SkImageFilter::CreateMatrixFilter(make_matrix(), 313 (SkFilterQuality)R(4), 314 make_image_filter()); 315 break; 316 case MATRIX_CONVOLUTION: 317 { 318 SkImageFilter::CropRect cropR(SkRect::MakeWH(SkIntToScalar(kBitmapSize), 319 SkIntToScalar(kBitmapSize))); 320 SkISize size = SkISize::Make(R(10)+1, R(10)+1); 321 int arraySize = size.width() * size.height(); 322 SkTArray<SkScalar> kernel(arraySize); 323 for (int i = 0; i < arraySize; ++i) { 324 kernel.push_back() = make_scalar(); 325 } 326 SkIPoint kernelOffset = SkIPoint::Make(R(SkIntToScalar(size.width())), 327 R(SkIntToScalar(size.height()))); 328 filter = SkMatrixConvolutionImageFilter::Create(size, 329 kernel.begin(), 330 make_scalar(), 331 make_scalar(), 332 kernelOffset, 333 (SkMatrixConvolutionImageFilter::TileMode)R(3), 334 R(2) == 1, 335 make_image_filter(), 336 &cropR); 337 } 338 break; 339 case COMPOSE: 340 filter = SkComposeImageFilter::Create(make_image_filter(), make_image_filter()); 341 break; 342 case DISTANT_LIGHT: 343 filter = (R(2) == 1) ? 344 SkLightingImageFilter::CreateDistantLitDiffuse(make_point(), 345 make_color(), make_scalar(), make_scalar(), make_image_filter()) : 346 SkLightingImageFilter::CreateDistantLitSpecular(make_point(), 347 make_color(), make_scalar(), make_scalar(), SkIntToScalar(R(10)), 348 make_image_filter()); 349 break; 350 case POINT_LIGHT: 351 filter = (R(2) == 1) ? 352 SkLightingImageFilter::CreatePointLitDiffuse(make_point(), 353 make_color(), make_scalar(), make_scalar(), make_image_filter()) : 354 SkLightingImageFilter::CreatePointLitSpecular(make_point(), 355 make_color(), make_scalar(), make_scalar(), SkIntToScalar(R(10)), 356 make_image_filter()); 357 break; 358 case SPOT_LIGHT: 359 filter = (R(2) == 1) ? 360 SkLightingImageFilter::CreateSpotLitDiffuse(SkPoint3(0, 0, 0), 361 make_point(), make_scalar(), make_scalar(), make_color(), 362 make_scalar(), make_scalar(), make_image_filter()) : 363 SkLightingImageFilter::CreateSpotLitSpecular(SkPoint3(0, 0, 0), 364 make_point(), make_scalar(), make_scalar(), make_color(), 365 make_scalar(), make_scalar(), SkIntToScalar(R(10)), make_image_filter()); 366 break; 367 case NOISE: 368 { 369 SkAutoTUnref<SkShader> shader((R(2) == 1) ? 370 SkPerlinNoiseShader::CreateFractalNoise( 371 make_scalar(true), make_scalar(true), R(10.0f), make_scalar()) : 372 SkPerlinNoiseShader::CreateTurbulence( 373 make_scalar(true), make_scalar(true), R(10.0f), make_scalar())); 374 SkImageFilter::CropRect cropR(SkRect::MakeWH(SkIntToScalar(kBitmapSize), 375 SkIntToScalar(kBitmapSize))); 376 filter = SkRectShaderImageFilter::Create(shader, &cropR); 377 } 378 break; 379 case DROP_SHADOW: 380 filter = SkDropShadowImageFilter::Create(make_scalar(), make_scalar(), make_scalar(true), 381 make_scalar(true), make_color(), make_shadow_mode(), make_image_filter(), 382 NULL); 383 break; 384 case MORPHOLOGY: 385 if (R(2) == 1) { 386 filter = SkDilateImageFilter::Create(R(static_cast<float>(kBitmapSize)), 387 R(static_cast<float>(kBitmapSize)), make_image_filter()); 388 } else { 389 filter = SkErodeImageFilter::Create(R(static_cast<float>(kBitmapSize)), 390 R(static_cast<float>(kBitmapSize)), make_image_filter()); 391 } 392 break; 393 case BITMAP: 394 if (R(2) == 1) { 395 filter = SkBitmapSource::Create(make_bitmap(), make_rect(), make_rect()); 396 } else { 397 filter = SkBitmapSource::Create(make_bitmap()); 398 } 399 break; 400 case DISPLACE: 401 filter = SkDisplacementMapEffect::Create(make_channel_selector_type(), 402 make_channel_selector_type(), make_scalar(), 403 make_image_filter(false), make_image_filter()); 404 break; 405 case TILE: 406 filter = SkTileImageFilter::Create(make_rect(), make_rect(), make_image_filter(false)); 407 break; 408 case PICTURE: 409 { 410 SkRTreeFactory factory; 411 SkPictureRecorder recorder; 412 SkCanvas* recordingCanvas = recorder.beginRecording(SkIntToScalar(kBitmapSize), 413 SkIntToScalar(kBitmapSize), 414 &factory, 0); 415 drawSomething(recordingCanvas); 416 SkAutoTUnref<SkPicture> pict(recorder.endRecording()); 417 filter = SkPictureImageFilter::Create(pict.get(), make_rect()); 418 } 419 break; 420 default: 421 break; 422 } 423 return (filter || canBeNull) ? filter : make_image_filter(canBeNull); 424} 425 426static SkImageFilter* make_serialized_image_filter() { 427 SkAutoTUnref<SkImageFilter> filter(make_image_filter(false)); 428 SkAutoTUnref<SkData> data(SkValidatingSerializeFlattenable(filter)); 429 const unsigned char* ptr = static_cast<const unsigned char*>(data->data()); 430 size_t len = data->size(); 431#ifdef SK_ADD_RANDOM_BIT_FLIPS 432 unsigned char* p = const_cast<unsigned char*>(ptr); 433 for (size_t i = 0; i < len; ++i, ++p) { 434 if (R(250) == 1) { // 0.4% of the time, flip a bit or byte 435 if (R(10) == 1) { // Then 10% of the time, change a whole byte 436 switch(R(3)) { 437 case 0: 438 *p ^= 0xFF; // Flip entire byte 439 break; 440 case 1: 441 *p = 0xFF; // Set all bits to 1 442 break; 443 case 2: 444 *p = 0x00; // Set all bits to 0 445 break; 446 } 447 } else { 448 *p ^= (1 << R(8)); 449 } 450 } 451 } 452#endif // SK_ADD_RANDOM_BIT_FLIPS 453 SkFlattenable* flattenable = SkValidatingDeserializeFlattenable(ptr, len, 454 SkImageFilter::GetFlattenableType()); 455 return static_cast<SkImageFilter*>(flattenable); 456} 457 458static void drawClippedBitmap(SkCanvas* canvas, int x, int y, const SkPaint& paint) { 459 canvas->save(); 460 canvas->clipRect(SkRect::MakeXYWH(SkIntToScalar(x), SkIntToScalar(y), 461 SkIntToScalar(kBitmapSize), SkIntToScalar(kBitmapSize))); 462 canvas->drawBitmap(make_bitmap(), SkIntToScalar(x), SkIntToScalar(y), &paint); 463 canvas->restore(); 464} 465 466static void do_fuzz(SkCanvas* canvas) { 467 SkImageFilter* filter = make_serialized_image_filter(); 468 469#ifdef SK_FUZZER_IS_VERBOSE 470 static uint32_t numFilters = 0; 471 static uint32_t numValidFilters = 0; 472 if (0 == numFilters) { 473 printf("Fuzzing with %u\n", kSeed); 474 } 475 numFilters++; 476 if (filter) { 477 numValidFilters++; 478 } 479 printf("Filter no : %u. Valid filters so far : %u\r", numFilters, numValidFilters); 480 fflush(stdout); 481#endif 482 483 SkPaint paint; 484 SkSafeUnref(paint.setImageFilter(filter)); 485 drawClippedBitmap(canvas, 0, 0, paint); 486} 487 488////////////////////////////////////////////////////////////////////////////// 489 490class ImageFilterFuzzView : public SampleView { 491public: 492 ImageFilterFuzzView() { 493 this->setBGColor(0xFFDDDDDD); 494 } 495 496protected: 497 // overrides from SkEventSink 498 virtual bool onQuery(SkEvent* evt) { 499 if (SampleCode::TitleQ(*evt)) { 500 SampleCode::TitleR(evt, "ImageFilterFuzzer"); 501 return true; 502 } 503 return this->INHERITED::onQuery(evt); 504 } 505 506 void drawBG(SkCanvas* canvas) { 507 canvas->drawColor(0xFFDDDDDD); 508 } 509 510 virtual void onDrawContent(SkCanvas* canvas) { 511 do_fuzz(canvas); 512 this->inval(0); 513 } 514 515private: 516 typedef SkView INHERITED; 517}; 518 519////////////////////////////////////////////////////////////////////////////// 520 521static SkView* MyFactory() { return new ImageFilterFuzzView; } 522static SkViewRegister reg(MyFactory); 523