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 "Sk1DPathEffect.h"
9 #include "Sk2DPathEffect.h"
10 #include "SkAlphaThresholdFilter.h"
11 #include "SkArcToPathEffect.h"
12 #include "SkBlurImageFilter.h"
13 #include "SkBlurMaskFilter.h"
14 #include "SkCanvas.h"
15 #include "SkColorFilter.h"
16 #include "SkColorFilterImageFilter.h"
17 #include "SkColorMatrixFilter.h"
18 #include "SkComposeImageFilter.h"
19 #include "SkCornerPathEffect.h"
20 #include "SkDashPathEffect.h"
21 #include "SkData.h"
22 #include "SkDiscretePathEffect.h"
23 #include "SkDisplacementMapEffect.h"
24 #include "SkDropShadowImageFilter.h"
25 #include "SkEmbossMaskFilter.h"
26 #include "SkFlattenableSerialization.h"
27 #include "SkImageSource.h"
28 #include "SkLayerRasterizer.h"
29 #include "SkLightingImageFilter.h"
30 #include "SkLumaColorFilter.h"
31 #include "SkMagnifierImageFilter.h"
32 #include "SkMatrixConvolutionImageFilter.h"
33 #include "SkMergeImageFilter.h"
34 #include "SkMorphologyImageFilter.h"
35 #include "SkOffsetImageFilter.h"
36 #include "SkPaintImageFilter.h"
37 #include "SkPerlinNoiseShader.h"
38 #include "SkPictureImageFilter.h"
39 #include "SkPictureRecorder.h"
40 #include "SkPoint3.h"
41 #include "SkRandom.h"
42 #include "SkTableColorFilter.h"
43 #include "SkTileImageFilter.h"
44 #include "SkTypeface.h"
45 #include "SkView.h"
46 #include "SkXfermodeImageFilter.h"
47 #include <stdio.h>
48 #include <time.h>
49
50 //#define SK_ADD_RANDOM_BIT_FLIPS
51 //#define SK_FUZZER_IS_VERBOSE
52
53 static const uint32_t kSeed = (uint32_t)(time(nullptr));
54 static SkRandom gRand(kSeed);
55 static bool return_large = false;
56 static bool return_undef = false;
57
58 static const int kBitmapSize = 24;
59
R(float x)60 static int R(float x) {
61 return (int)floor(SkScalarToFloat(gRand.nextUScalar1()) * x);
62 }
63
64 #if defined _WIN32
65 #pragma warning ( push )
66 // we are intentionally causing an overflow here
67 // (warning C4756: overflow in constant arithmetic)
68 #pragma warning ( disable : 4756 )
69 #endif
70
huge()71 static float huge() {
72 double d = 1e100;
73 float f = (float)d;
74 return f;
75 }
76
77 #if defined _WIN32
78 #pragma warning ( pop )
79 #endif
80
make_number(bool positiveOnly)81 static float make_number(bool positiveOnly) {
82 float f = positiveOnly ? 1.0f : 0.0f;
83 float v = f;
84 int sel;
85
86 if (return_large) sel = R(6); else sel = R(4);
87 if (!return_undef && sel == 0) sel = 1;
88
89 if (R(2) == 1) v = (float)(R(100)+f); else
90
91 switch (sel) {
92 case 0: break;
93 case 1: v = f; break;
94 case 2: v = 0.000001f; break;
95 case 3: v = 10000.0f; break;
96 case 4: v = 2000000000.0f; break;
97 case 5: v = huge(); break;
98 }
99
100 if (!positiveOnly && (R(4) == 1)) v = -v;
101 return v;
102 }
103
make_scalar(bool positiveOnly=false)104 static SkScalar make_scalar(bool positiveOnly = false) {
105 return make_number(positiveOnly);
106 }
107
make_string()108 static SkString make_string() {
109 int length = R(1000);
110 SkString str(length);
111 for (int i = 0; i < length; ++i) {
112 str[i] = static_cast<char>(R(256));
113 }
114 return str;
115 }
116
make_font_name()117 static SkString make_font_name() {
118 int sel = R(8);
119
120 switch(sel) {
121 case 0: return SkString("Courier New");
122 case 1: return SkString("Helvetica");
123 case 2: return SkString("monospace");
124 case 3: return SkString("sans-serif");
125 case 4: return SkString("serif");
126 case 5: return SkString("Times");
127 case 6: return SkString("Times New Roman");
128 case 7:
129 default:
130 return make_string();
131 }
132 }
133
make_bool()134 static bool make_bool() {
135 return R(2) == 1;
136 }
137
make_rect()138 static SkRect make_rect() {
139 return SkRect::MakeWH(SkIntToScalar(R(static_cast<float>(kBitmapSize))),
140 SkIntToScalar(R(static_cast<float>(kBitmapSize))));
141 }
142
make_region()143 static SkRegion make_region() {
144 SkIRect iRegion = SkIRect::MakeXYWH(R(static_cast<float>(kBitmapSize)),
145 R(static_cast<float>(kBitmapSize)),
146 R(static_cast<float>(kBitmapSize)),
147 R(static_cast<float>(kBitmapSize)));
148 return SkRegion(iRegion);
149 }
150
make_matrix()151 static SkMatrix make_matrix() {
152 SkMatrix m;
153 for (int i = 0; i < 9; ++i) {
154 m[i] = make_scalar();
155 }
156 return m;
157 }
158
make_xfermode()159 static SkBlendMode make_xfermode() {
160 return static_cast<SkBlendMode>(R((int)SkBlendMode::kLastMode+1));
161 }
162
make_paint_align()163 static SkPaint::Align make_paint_align() {
164 return static_cast<SkPaint::Align>(R(SkPaint::kRight_Align+1));
165 }
166
make_paint_hinting()167 static SkPaint::Hinting make_paint_hinting() {
168 return static_cast<SkPaint::Hinting>(R(SkPaint::kFull_Hinting+1));
169 }
170
make_paint_style()171 static SkPaint::Style make_paint_style() {
172 return static_cast<SkPaint::Style>(R(SkPaint::kStrokeAndFill_Style+1));
173 }
174
make_paint_cap()175 static SkPaint::Cap make_paint_cap() {
176 return static_cast<SkPaint::Cap>(R(SkPaint::kDefault_Cap+1));
177 }
178
make_paint_join()179 static SkPaint::Join make_paint_join() {
180 return static_cast<SkPaint::Join>(R(SkPaint::kDefault_Join+1));
181 }
182
make_paint_text_encoding()183 static SkPaint::TextEncoding make_paint_text_encoding() {
184 return static_cast<SkPaint::TextEncoding>(R(SkPaint::kGlyphID_TextEncoding+1));
185 }
186
make_blur_style()187 static SkBlurStyle make_blur_style() {
188 return static_cast<SkBlurStyle>(R(kLastEnum_SkBlurStyle+1));
189 }
190
make_blur_mask_filter_flag()191 static SkBlurMaskFilter::BlurFlags make_blur_mask_filter_flag() {
192 return static_cast<SkBlurMaskFilter::BlurFlags>(R(SkBlurMaskFilter::kAll_BlurFlag+1));
193 }
194
make_filter_quality()195 static SkFilterQuality make_filter_quality() {
196 return static_cast<SkFilterQuality>(R(kHigh_SkFilterQuality+1));
197 }
198
make_typeface_style()199 static SkFontStyle make_typeface_style() {
200 return SkFontStyle::FromOldStyle(SkTypeface::kBoldItalic+1);
201 }
202
make_path_1d_path_effect_style()203 static SkPath1DPathEffect::Style make_path_1d_path_effect_style() {
204 return static_cast<SkPath1DPathEffect::Style>(R((int)SkPath1DPathEffect::kLastEnum_Style + 1));
205 }
206
make_color()207 static SkColor make_color() {
208 return (R(2) == 1) ? 0xFFC0F0A0 : 0xFF000090;
209 }
210
make_shadow_mode()211 static SkDropShadowImageFilter::ShadowMode make_shadow_mode() {
212 return (R(2) == 1) ? SkDropShadowImageFilter::kDrawShadowAndForeground_ShadowMode :
213 SkDropShadowImageFilter::kDrawShadowOnly_ShadowMode;
214 }
215
make_point()216 static SkPoint3 make_point() {
217 return SkPoint3::Make(make_scalar(), make_scalar(), make_scalar(true));
218 }
219
make_channel_selector_type()220 static SkDisplacementMapEffect::ChannelSelectorType make_channel_selector_type() {
221 return static_cast<SkDisplacementMapEffect::ChannelSelectorType>(R(4)+1);
222 }
223
valid_for_raster_canvas(const SkImageInfo & info)224 static bool valid_for_raster_canvas(const SkImageInfo& info) {
225 switch (info.colorType()) {
226 case kAlpha_8_SkColorType:
227 case kRGB_565_SkColorType:
228 return true;
229 case kN32_SkColorType:
230 return kPremul_SkAlphaType == info.alphaType() ||
231 kOpaque_SkAlphaType == info.alphaType();
232 default:
233 break;
234 }
235 return false;
236 }
237
rand_colortype()238 static SkColorType rand_colortype() {
239 return (SkColorType)R(kLastEnum_SkColorType + 1);
240 }
241
rand_bitmap_for_canvas(SkBitmap * bitmap)242 static void rand_bitmap_for_canvas(SkBitmap* bitmap) {
243 SkImageInfo info;
244 do {
245 info = SkImageInfo::Make(kBitmapSize, kBitmapSize, rand_colortype(),
246 kPremul_SkAlphaType);
247 } while (!valid_for_raster_canvas(info) || !bitmap->tryAllocPixels(info));
248 }
249
make_g_bitmap(SkBitmap & bitmap)250 static void make_g_bitmap(SkBitmap& bitmap) {
251 rand_bitmap_for_canvas(&bitmap);
252
253 SkCanvas canvas(bitmap);
254 canvas.clear(0x00000000);
255 SkPaint paint;
256 paint.setAntiAlias(true);
257 paint.setColor(0xFF884422);
258 paint.setTextSize(SkIntToScalar(kBitmapSize/2));
259 const char* str = "g";
260 canvas.drawText(str, strlen(str), SkIntToScalar(kBitmapSize/8),
261 SkIntToScalar(kBitmapSize/4), paint);
262 }
263
make_checkerboard_bitmap(SkBitmap & bitmap)264 static void make_checkerboard_bitmap(SkBitmap& bitmap) {
265 rand_bitmap_for_canvas(&bitmap);
266
267 SkCanvas canvas(bitmap);
268 canvas.clear(0x00000000);
269 SkPaint darkPaint;
270 darkPaint.setColor(0xFF804020);
271 SkPaint lightPaint;
272 lightPaint.setColor(0xFF244484);
273 const int i = kBitmapSize / 8;
274 const SkScalar f = SkIntToScalar(i);
275 for (int y = 0; y < kBitmapSize; y += i) {
276 for (int x = 0; x < kBitmapSize; x += i) {
277 canvas.save();
278 canvas.translate(SkIntToScalar(x), SkIntToScalar(y));
279 canvas.drawRect(SkRect::MakeXYWH(0, 0, f, f), darkPaint);
280 canvas.drawRect(SkRect::MakeXYWH(f, 0, f, f), lightPaint);
281 canvas.drawRect(SkRect::MakeXYWH(0, f, f, f), lightPaint);
282 canvas.drawRect(SkRect::MakeXYWH(f, f, f, f), darkPaint);
283 canvas.restore();
284 }
285 }
286 }
287
make_bitmap()288 static const SkBitmap& make_bitmap() {
289 static SkBitmap bitmap[2];
290 static bool initialized = false;
291 if (!initialized) {
292 make_g_bitmap(bitmap[0]);
293 make_checkerboard_bitmap(bitmap[1]);
294 initialized = true;
295 }
296 return bitmap[R(2)];
297 }
298
make_3Dlut(int * cubeDimension,bool invR,bool invG,bool invB)299 static sk_sp<SkData> make_3Dlut(int* cubeDimension, bool invR, bool invG, bool invB) {
300 int size = 4 << R(5);
301 auto data = SkData::MakeUninitialized(sizeof(SkColor) * size * size * size);
302 SkColor* pixels = (SkColor*)(data->writable_data());
303 SkAutoTMalloc<uint8_t> lutMemory(size);
304 SkAutoTMalloc<uint8_t> invLutMemory(size);
305 uint8_t* lut = lutMemory.get();
306 uint8_t* invLut = invLutMemory.get();
307 const int maxIndex = size - 1;
308 for (int i = 0; i < size; i++) {
309 lut[i] = (i * 255) / maxIndex;
310 invLut[i] = ((maxIndex - i) * 255) / maxIndex;
311 }
312 for (int r = 0; r < size; ++r) {
313 for (int g = 0; g < size; ++g) {
314 for (int b = 0; b < size; ++b) {
315 pixels[(size * ((size * b) + g)) + r] = SkColorSetARGB(0xFF,
316 invR ? invLut[r] : lut[r],
317 invG ? invLut[g] : lut[g],
318 invB ? invLut[b] : lut[b]);
319 }
320 }
321 }
322 if (cubeDimension) {
323 *cubeDimension = size;
324 }
325 return data;
326 }
327
drawSomething(SkCanvas * canvas)328 static void drawSomething(SkCanvas* canvas) {
329 SkPaint paint;
330
331 canvas->save();
332 canvas->scale(0.5f, 0.5f);
333 canvas->drawBitmap(make_bitmap(), 0, 0, nullptr);
334 canvas->restore();
335
336 paint.setAntiAlias(true);
337
338 paint.setColor(SK_ColorRED);
339 canvas->drawCircle(SkIntToScalar(kBitmapSize/2), SkIntToScalar(kBitmapSize/2), SkIntToScalar(kBitmapSize/3), paint);
340 paint.setColor(SK_ColorBLACK);
341 paint.setTextSize(SkIntToScalar(kBitmapSize/3));
342 canvas->drawText("Picture", 7, SkIntToScalar(kBitmapSize/2), SkIntToScalar(kBitmapSize/4), paint);
343 }
344
rand_color_table(uint8_t * table)345 static void rand_color_table(uint8_t* table) {
346 for (int i = 0; i < 256; ++i) {
347 table[i] = R(256);
348 }
349 }
350
make_color_filter()351 static sk_sp<SkColorFilter> make_color_filter() {
352 switch (R(6)) {
353 case 0: {
354 SkScalar array[20];
355 for (int i = 0; i < 20; ++i) {
356 array[i] = make_scalar();
357 }
358 return SkColorFilter::MakeMatrixFilterRowMajor255(array);
359 }
360 case 1:
361 return SkLumaColorFilter::Make();
362 case 2: {
363 uint8_t tableA[256];
364 uint8_t tableR[256];
365 uint8_t tableG[256];
366 uint8_t tableB[256];
367 rand_color_table(tableA);
368 rand_color_table(tableR);
369 rand_color_table(tableG);
370 rand_color_table(tableB);
371 return SkTableColorFilter::MakeARGB(tableA, tableR, tableG, tableB);
372 }
373 case 3:
374 return SkColorFilter::MakeModeFilter(make_color(), make_xfermode());
375 case 4:
376 return SkColorMatrixFilter::MakeLightingFilter(make_color(), make_color());
377 case 5:
378 default:
379 break;
380 }
381 return nullptr;
382 }
383
make_path()384 static SkPath make_path() {
385 SkPath path;
386 int numOps = R(30);
387 for (int i = 0; i < numOps; ++i) {
388 switch (R(6)) {
389 case 0:
390 path.moveTo(make_scalar(), make_scalar());
391 break;
392 case 1:
393 path.lineTo(make_scalar(), make_scalar());
394 break;
395 case 2:
396 path.quadTo(make_scalar(), make_scalar(), make_scalar(), make_scalar());
397 break;
398 case 3:
399 path.conicTo(make_scalar(), make_scalar(), make_scalar(), make_scalar(), make_scalar());
400 break;
401 case 4:
402 path.cubicTo(make_scalar(), make_scalar(), make_scalar(),
403 make_scalar(), make_scalar(), make_scalar());
404 break;
405 case 5:
406 default:
407 path.arcTo(make_scalar(), make_scalar(), make_scalar(), make_scalar(), make_scalar());
408 break;
409
410 }
411 }
412 path.close();
413 return path;
414 }
415
make_path_effect(bool canBeNull=true)416 static sk_sp<SkPathEffect> make_path_effect(bool canBeNull = true) {
417 sk_sp<SkPathEffect> pathEffect;
418 if (canBeNull && (R(3) == 1)) { return pathEffect; }
419
420 switch (R(9)) {
421 case 0:
422 pathEffect = SkArcToPathEffect::Make(make_scalar(true));
423 break;
424 case 1:
425 pathEffect = SkPathEffect::MakeCompose(make_path_effect(false),
426 make_path_effect(false));
427 break;
428 case 2:
429 pathEffect = SkCornerPathEffect::Make(make_scalar());
430 break;
431 case 3: {
432 int count = R(10);
433 SkScalar intervals[10];
434 for (int i = 0; i < count; ++i) {
435 intervals[i] = make_scalar();
436 }
437 pathEffect = SkDashPathEffect::Make(intervals, count, make_scalar());
438 break;
439 }
440 case 4:
441 pathEffect = SkDiscretePathEffect::Make(make_scalar(), make_scalar());
442 break;
443 case 5:
444 pathEffect = SkPath1DPathEffect::Make(make_path(), make_scalar(), make_scalar(),
445 make_path_1d_path_effect_style());
446 break;
447 case 6:
448 pathEffect = SkLine2DPathEffect::Make(make_scalar(), make_matrix());
449 break;
450 case 7:
451 pathEffect = SkPath2DPathEffect::Make(make_matrix(), make_path());
452 break;
453 case 8:
454 default:
455 pathEffect = SkPathEffect::MakeSum(make_path_effect(false),
456 make_path_effect(false));
457 break;
458 }
459 return pathEffect;
460 }
461
make_mask_filter()462 static sk_sp<SkMaskFilter> make_mask_filter() {
463 sk_sp<SkMaskFilter> maskFilter;
464 switch (R(3)) {
465 case 0:
466 maskFilter = SkBlurMaskFilter::Make(make_blur_style(), make_scalar(),
467 make_blur_mask_filter_flag());
468 case 1: {
469 SkEmbossMaskFilter::Light light;
470 for (int i = 0; i < 3; ++i) {
471 light.fDirection[i] = make_scalar();
472 }
473 light.fPad = R(65536);
474 light.fAmbient = R(256);
475 light.fSpecular = R(256);
476 maskFilter = SkEmbossMaskFilter::Make(make_scalar(), light);
477 }
478 case 2:
479 default:
480 break;
481 }
482 return maskFilter;
483 }
484
485 static sk_sp<SkImageFilter> make_image_filter(bool canBeNull = true);
486
make_paint()487 static SkPaint make_paint() {
488 SkPaint paint;
489 paint.setHinting(make_paint_hinting());
490 paint.setAntiAlias(make_bool());
491 paint.setDither(make_bool());
492 paint.setLinearText(make_bool());
493 paint.setSubpixelText(make_bool());
494 paint.setLCDRenderText(make_bool());
495 paint.setEmbeddedBitmapText(make_bool());
496 paint.setAutohinted(make_bool());
497 paint.setVerticalText(make_bool());
498 paint.setFakeBoldText(make_bool());
499 paint.setDevKernText(make_bool());
500 paint.setFilterQuality(make_filter_quality());
501 paint.setStyle(make_paint_style());
502 paint.setColor(make_color());
503 paint.setStrokeWidth(make_scalar());
504 paint.setStrokeMiter(make_scalar());
505 paint.setStrokeCap(make_paint_cap());
506 paint.setStrokeJoin(make_paint_join());
507 paint.setColorFilter(make_color_filter());
508 paint.setBlendMode(make_xfermode());
509 paint.setPathEffect(make_path_effect());
510 paint.setMaskFilter(make_mask_filter());
511
512 if (false) {
513 // our validating buffer does not support typefaces yet, so skip this for now
514 paint.setTypeface(SkTypeface::MakeFromName(make_font_name().c_str(),
515 make_typeface_style()));
516 }
517
518 SkLayerRasterizer::Builder rasterizerBuilder;
519 SkPaint paintForRasterizer;
520 if (R(2) == 1) {
521 paintForRasterizer = make_paint();
522 }
523 rasterizerBuilder.addLayer(paintForRasterizer);
524 paint.setRasterizer(rasterizerBuilder.detach());
525 paint.setImageFilter(make_image_filter());
526 sk_sp<SkData> data(make_3Dlut(nullptr, make_bool(), make_bool(), make_bool()));
527 paint.setTextAlign(make_paint_align());
528 paint.setTextSize(make_scalar());
529 paint.setTextScaleX(make_scalar());
530 paint.setTextSkewX(make_scalar());
531 paint.setTextEncoding(make_paint_text_encoding());
532 return paint;
533 }
534
make_image_filter(bool canBeNull)535 static sk_sp<SkImageFilter> make_image_filter(bool canBeNull) {
536 sk_sp<SkImageFilter> filter;
537
538 // Add a 1 in 3 chance to get a nullptr input
539 if (canBeNull && (R(3) == 1)) {
540 return filter;
541 }
542
543 enum { ALPHA_THRESHOLD, MERGE, COLOR, BLUR, MAGNIFIER,
544 XFERMODE, OFFSET, MATRIX, MATRIX_CONVOLUTION, COMPOSE,
545 DISTANT_LIGHT, POINT_LIGHT, SPOT_LIGHT, NOISE, DROP_SHADOW,
546 MORPHOLOGY, BITMAP, DISPLACE, TILE, PICTURE, PAINT, NUM_FILTERS };
547
548 switch (R(NUM_FILTERS)) {
549 case ALPHA_THRESHOLD:
550 filter = SkAlphaThresholdFilter::Make(make_region(),
551 make_scalar(),
552 make_scalar(),
553 make_image_filter());
554 break;
555 case MERGE:
556 filter = SkMergeImageFilter::Make(make_image_filter(),
557 make_image_filter(),
558 make_xfermode());
559 break;
560 case COLOR: {
561 sk_sp<SkColorFilter> cf(make_color_filter());
562 filter = cf ? SkColorFilterImageFilter::Make(std::move(cf), make_image_filter())
563 : nullptr;
564 break;
565 }
566 case BLUR:
567 filter = SkBlurImageFilter::Make(make_scalar(true),
568 make_scalar(true),
569 make_image_filter());
570 break;
571 case MAGNIFIER:
572 filter = SkMagnifierImageFilter::Make(make_rect(),
573 make_scalar(true),
574 make_image_filter());
575 break;
576 case XFERMODE:
577 filter = SkXfermodeImageFilter::Make(make_xfermode(),
578 make_image_filter(),
579 make_image_filter(),
580 nullptr);
581 break;
582 case OFFSET:
583 filter = SkOffsetImageFilter::Make(make_scalar(), make_scalar(), make_image_filter());
584 break;
585 case MATRIX:
586 filter = SkImageFilter::MakeMatrixFilter(make_matrix(),
587 (SkFilterQuality)R(4),
588 make_image_filter());
589 break;
590 case MATRIX_CONVOLUTION: {
591 SkImageFilter::CropRect cropR(SkRect::MakeWH(SkIntToScalar(kBitmapSize),
592 SkIntToScalar(kBitmapSize)));
593 SkISize size = SkISize::Make(R(10)+1, R(10)+1);
594 int arraySize = size.width() * size.height();
595 SkTArray<SkScalar> kernel(arraySize);
596 for (int i = 0; i < arraySize; ++i) {
597 kernel.push_back() = make_scalar();
598 }
599 SkIPoint kernelOffset = SkIPoint::Make(R(SkIntToScalar(size.width())),
600 R(SkIntToScalar(size.height())));
601
602 filter = SkMatrixConvolutionImageFilter::Make(size,
603 kernel.begin(),
604 make_scalar(),
605 make_scalar(),
606 kernelOffset,
607 (SkMatrixConvolutionImageFilter::TileMode)R(3),
608 R(2) == 1,
609 make_image_filter(),
610 &cropR);
611 break;
612 }
613 case COMPOSE:
614 filter = SkComposeImageFilter::Make(make_image_filter(), make_image_filter());
615 break;
616 case DISTANT_LIGHT:
617 filter = (R(2) == 1)
618 ? SkLightingImageFilter::MakeDistantLitDiffuse(make_point(), make_color(),
619 make_scalar(), make_scalar(),
620 make_image_filter())
621 : SkLightingImageFilter::MakeDistantLitSpecular(make_point(), make_color(),
622 make_scalar(), make_scalar(),
623 SkIntToScalar(R(10)),
624 make_image_filter());
625 break;
626 case POINT_LIGHT:
627 filter = (R(2) == 1)
628 ? SkLightingImageFilter::MakePointLitDiffuse(make_point(), make_color(),
629 make_scalar(), make_scalar(),
630 make_image_filter())
631 : SkLightingImageFilter::MakePointLitSpecular(make_point(), make_color(),
632 make_scalar(), make_scalar(),
633 SkIntToScalar(R(10)),
634 make_image_filter());
635 break;
636 case SPOT_LIGHT:
637 filter = (R(2) == 1)
638 ? SkLightingImageFilter::MakeSpotLitDiffuse(SkPoint3::Make(0, 0, 0),
639 make_point(), make_scalar(),
640 make_scalar(), make_color(),
641 make_scalar(), make_scalar(),
642 make_image_filter())
643 : SkLightingImageFilter::MakeSpotLitSpecular(SkPoint3::Make(0, 0, 0),
644 make_point(), make_scalar(),
645 make_scalar(), make_color(),
646 make_scalar(), make_scalar(),
647 SkIntToScalar(R(10)),
648 make_image_filter());
649 break;
650 case NOISE: {
651 sk_sp<SkShader> shader((R(2) == 1)
652 ? SkPerlinNoiseShader::MakeFractalNoise(make_scalar(true), make_scalar(true),
653 R(10.0f), make_scalar())
654 : SkPerlinNoiseShader::MakeTurbulence(make_scalar(true), make_scalar(true),
655 R(10.0f), make_scalar()));
656 SkPaint paint;
657 paint.setShader(shader);
658 SkImageFilter::CropRect cropR(SkRect::MakeWH(SkIntToScalar(kBitmapSize),
659 SkIntToScalar(kBitmapSize)));
660 filter = SkPaintImageFilter::Make(paint, &cropR);
661 break;
662 }
663 case DROP_SHADOW:
664 filter = SkDropShadowImageFilter::Make(make_scalar(),
665 make_scalar(),
666 make_scalar(true),
667 make_scalar(true),
668 make_color(),
669 make_shadow_mode(),
670 make_image_filter(),
671 nullptr);
672 break;
673 case MORPHOLOGY:
674 if (R(2) == 1) {
675 filter = SkDilateImageFilter::Make(R(static_cast<float>(kBitmapSize)),
676 R(static_cast<float>(kBitmapSize)),
677 make_image_filter());
678 } else {
679 filter = SkErodeImageFilter::Make(R(static_cast<float>(kBitmapSize)),
680 R(static_cast<float>(kBitmapSize)),
681 make_image_filter());
682 }
683 break;
684 case BITMAP: {
685 sk_sp<SkImage> image(SkImage::MakeFromBitmap(make_bitmap()));
686 if (R(2) == 1) {
687 filter = SkImageSource::Make(std::move(image),
688 make_rect(),
689 make_rect(),
690 kHigh_SkFilterQuality);
691 } else {
692 filter = SkImageSource::Make(std::move(image));
693 }
694 break;
695 }
696 case DISPLACE:
697 filter = SkDisplacementMapEffect::Make(make_channel_selector_type(),
698 make_channel_selector_type(),
699 make_scalar(),
700 make_image_filter(false),
701 make_image_filter());
702 break;
703 case TILE:
704 filter = SkTileImageFilter::Make(make_rect(), make_rect(), make_image_filter(false));
705 break;
706 case PICTURE: {
707 SkRTreeFactory factory;
708 SkPictureRecorder recorder;
709 SkCanvas* recordingCanvas = recorder.beginRecording(SkIntToScalar(kBitmapSize),
710 SkIntToScalar(kBitmapSize),
711 &factory, 0);
712 drawSomething(recordingCanvas);
713 sk_sp<SkPicture> pict(recorder.finishRecordingAsPicture());
714 filter = SkPictureImageFilter::Make(pict, make_rect());
715 break;
716 }
717 case PAINT: {
718 SkImageFilter::CropRect cropR(make_rect());
719 filter = SkPaintImageFilter::Make(make_paint(), &cropR);
720 break;
721 }
722 default:
723 break;
724 }
725 return (filter || canBeNull) ? filter : make_image_filter(canBeNull);
726 }
727
make_serialized_image_filter()728 static sk_sp<SkImageFilter> make_serialized_image_filter() {
729 sk_sp<SkImageFilter> filter(make_image_filter(false));
730 sk_sp<SkData> data(SkValidatingSerializeFlattenable(filter.get()));
731 const unsigned char* ptr = static_cast<const unsigned char*>(data->data());
732 size_t len = data->size();
733 #ifdef SK_ADD_RANDOM_BIT_FLIPS
734 unsigned char* p = const_cast<unsigned char*>(ptr);
735 for (size_t i = 0; i < len; ++i, ++p) {
736 if (R(250) == 1) { // 0.4% of the time, flip a bit or byte
737 if (R(10) == 1) { // Then 10% of the time, change a whole byte
738 switch(R(3)) {
739 case 0:
740 *p ^= 0xFF; // Flip entire byte
741 break;
742 case 1:
743 *p = 0xFF; // Set all bits to 1
744 break;
745 case 2:
746 *p = 0x00; // Set all bits to 0
747 break;
748 }
749 } else {
750 *p ^= (1 << R(8));
751 }
752 }
753 }
754 #endif // SK_ADD_RANDOM_BIT_FLIPS
755 return SkValidatingDeserializeImageFilter(ptr, len);
756 }
757
drawClippedBitmap(SkCanvas * canvas,int x,int y,const SkPaint & paint)758 static void drawClippedBitmap(SkCanvas* canvas, int x, int y, const SkPaint& paint) {
759 canvas->save();
760 canvas->clipRect(SkRect::MakeXYWH(SkIntToScalar(x), SkIntToScalar(y),
761 SkIntToScalar(kBitmapSize), SkIntToScalar(kBitmapSize)));
762 canvas->drawBitmap(make_bitmap(), SkIntToScalar(x), SkIntToScalar(y), &paint);
763 canvas->restore();
764 }
765
do_fuzz(SkCanvas * canvas)766 static void do_fuzz(SkCanvas* canvas) {
767 sk_sp<SkImageFilter> filter = make_serialized_image_filter();
768
769 #ifdef SK_FUZZER_IS_VERBOSE
770 static uint32_t numFilters = 0;
771 static uint32_t numValidFilters = 0;
772 if (0 == numFilters) {
773 printf("Fuzzing with %u\n", kSeed);
774 }
775 numFilters++;
776 if (filter) {
777 numValidFilters++;
778 }
779 printf("Filter no : %u. Valid filters so far : %u\r", numFilters, numValidFilters);
780 fflush(stdout);
781 #endif
782
783 SkPaint paint;
784 paint.setImageFilter(filter);
785 drawClippedBitmap(canvas, 0, 0, paint);
786 }
787
788 //////////////////////////////////////////////////////////////////////////////
789
790 class ImageFilterFuzzView : public SampleView {
791 public:
ImageFilterFuzzView()792 ImageFilterFuzzView() {
793 this->setBGColor(0xFFDDDDDD);
794 }
795
796 protected:
797 // overrides from SkEventSink
onQuery(SkEvent * evt)798 virtual bool onQuery(SkEvent* evt) {
799 if (SampleCode::TitleQ(*evt)) {
800 SampleCode::TitleR(evt, "ImageFilterFuzzer");
801 return true;
802 }
803 return this->INHERITED::onQuery(evt);
804 }
805
drawBG(SkCanvas * canvas)806 void drawBG(SkCanvas* canvas) {
807 canvas->drawColor(0xFFDDDDDD);
808 }
809
onDrawContent(SkCanvas * canvas)810 virtual void onDrawContent(SkCanvas* canvas) {
811 do_fuzz(canvas);
812 this->inval(0);
813 }
814
815 private:
816 typedef SkView INHERITED;
817 };
818
819 //////////////////////////////////////////////////////////////////////////////
820
MyFactory()821 static SkView* MyFactory() { return new ImageFilterFuzzView; }
822 static SkViewRegister reg(MyFactory);
823