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