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FuzzCanvas.cpp
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/*
* Copyright 2017 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "fuzz/Fuzz.h"
#include "fuzz/FuzzCommon.h"
#include "include/codec/SkPngDecoder.h"
#include "include/core/SkBitmap.h"
#include "include/core/SkBlurTypes.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkColorFilter.h"
#include "include/core/SkFontMgr.h"
#include "include/core/SkImageFilter.h"
#include "include/core/SkMaskFilter.h"
#include "include/core/SkPathEffect.h"
#include "include/core/SkPictureRecorder.h"
#include "include/core/SkPoint3.h"
#include "include/core/SkRSXform.h"
#include "include/core/SkRegion.h"
#include "include/core/SkSurface.h"
#include "include/core/SkTextBlob.h"
#include "include/core/SkTypeface.h"
#include "include/core/SkVertices.h"
#include "include/docs/SkPDFDocument.h"
#include "include/effects/Sk1DPathEffect.h"
#include "include/effects/Sk2DPathEffect.h"
#include "include/effects/SkCornerPathEffect.h"
#include "include/effects/SkDashPathEffect.h"
#include "include/effects/SkDiscretePathEffect.h"
#include "include/effects/SkGradientShader.h"
#include "include/effects/SkHighContrastFilter.h"
#include "include/effects/SkImageFilters.h"
#include "include/effects/SkLumaColorFilter.h"
#include "include/effects/SkPerlinNoiseShader.h"
#include "include/encode/SkPngEncoder.h"
#include "include/gpu/ganesh/SkSurfaceGanesh.h"
#include "include/private/base/SkTo.h"
#include "include/svg/SkSVGCanvas.h"
#include "include/utils/SkNullCanvas.h"
#include "src/base/SkUTF.h"
#include "src/core/SkFontPriv.h"
#include "src/core/SkOSFile.h"
#include "src/core/SkPaintPriv.h"
#include "src/core/SkPicturePriv.h"
#include "src/core/SkReadBuffer.h"
#include "src/utils/SkJSONWriter.h"
#include "tools/UrlDataManager.h"
#include "tools/debugger/DebugCanvas.h"
#include "tools/flags/CommandLineFlags.h"
#include "tools/fonts/FontToolUtils.h"
#if defined(SK_GANESH)
#include "include/gpu/GrDirectContext.h"
#include "src/gpu/ganesh/GrDirectContextPriv.h"
#include "tools/gpu/GrContextFactory.h"
#endif
#ifdef SK_GL
#include "include/gpu/gl/GrGLFunctions.h"
#include "src/gpu/ganesh/gl/GrGLGpu.h"
#include "src/gpu/ganesh/gl/GrGLUtil.h"
#endif
#include <iostream>
#include <utility>
using namespace skia_private;
static DEFINE_bool2(gpuInfo, g, false, "Display GPU information on relevant targets.");
// TODO:
// SkTextBlob with Unicode
// SkImage: more types
// be careful: `foo(make_fuzz_t<T>(f), make_fuzz_t<U>(f))` is undefined.
// In fact, all make_fuzz_foo() functions have this potential problem.
// Use sequence points!
template <typename T>
inline T make_fuzz_t(Fuzz* fuzz) {
T t;
fuzz->next(&t);
return t;
}
static sk_sp<SkImage> make_fuzz_image(Fuzz*);
static sk_sp<SkPicture> make_fuzz_picture(Fuzz*, int depth);
static sk_sp<SkColorFilter> make_fuzz_colorfilter(Fuzz* fuzz, int depth) {
if (depth <= 0) {
return nullptr;
}
int colorFilterType;
fuzz->nextRange(&colorFilterType, 0, 8);
switch (colorFilterType) {
case 0:
return nullptr;
case 1: {
SkColor color;
SkBlendMode mode;
fuzz->next(&color);
fuzz->nextEnum(&mode, SkBlendMode::kLastMode);
return SkColorFilters::Blend(color, mode);
}
case 2: {
sk_sp<SkColorFilter> outer = make_fuzz_colorfilter(fuzz, depth - 1);
if (!outer) {
return nullptr;
}
sk_sp<SkColorFilter> inner = make_fuzz_colorfilter(fuzz, depth - 1);
// makeComposed should be able to handle nullptr.
return outer->makeComposed(std::move(inner));
}
case 3: {
float array[20];
fuzz->nextN(array, std::size(array));
return SkColorFilters::Matrix(array);
}
case 4: {
SkColor mul, add;
fuzz->next(&mul, &add);
return SkColorFilters::Lighting(mul, add);
}
case 5: {
bool grayscale;
int invertStyle;
float contrast;
fuzz->next(&grayscale);
fuzz->nextRange(&invertStyle, 0, 2);
fuzz->nextRange(&contrast, -1.0f, 1.0f);
return SkHighContrastFilter::Make(SkHighContrastConfig(
grayscale, SkHighContrastConfig::InvertStyle(invertStyle), contrast));
}
case 6:
return SkLumaColorFilter::Make();
case 7: {
uint8_t table[256];
fuzz->nextN(table, std::size(table));
return SkColorFilters::Table(table);
}
case 8: {
uint8_t tableA[256];
uint8_t tableR[256];
uint8_t tableG[256];
uint8_t tableB[256];
fuzz->nextN(tableA, std::size(tableA));
fuzz->nextN(tableR, std::size(tableR));
fuzz->nextN(tableG, std::size(tableG));
fuzz->nextN(tableB, std::size(tableB));
return SkColorFilters::TableARGB(tableA, tableR, tableG, tableB);
}
default:
SkASSERT(false);
break;
}
return nullptr;
}
static void fuzz_gradient_stops(Fuzz* fuzz, SkScalar* pos, int colorCount) {
SkScalar totalPos = 0;
for (int i = 0; i < colorCount; ++i) {
fuzz->nextRange(&pos[i], 1.0f, 1024.0f);
totalPos += pos[i];
}
totalPos = 1.0f / totalPos;
for (int i = 0; i < colorCount; ++i) {
pos[i] *= totalPos;
}
// SkASSERT(fabs(pos[colorCount - 1] - 1.0f) < 0.00001f);
pos[colorCount - 1] = 1.0f;
}
static sk_sp<SkShader> make_fuzz_shader(Fuzz* fuzz, int depth) {
sk_sp<SkShader> shader1(nullptr), shader2(nullptr);
sk_sp<SkColorFilter> colorFilter(nullptr);
SkBitmap bitmap;
sk_sp<SkImage> img;
SkTileMode tmX, tmY;
bool useMatrix;
SkColor color;
SkMatrix matrix;
SkBlendMode blendMode;
int shaderType;
if (depth <= 0) {
return nullptr;
}
fuzz->nextRange(&shaderType, 0, 14);
switch (shaderType) {
case 0:
return nullptr;
case 1:
return SkShaders::Empty();
case 2:
fuzz->next(&color);
return SkShaders::Color(color);
case 3:
img = make_fuzz_image(fuzz);
fuzz->nextEnum(&tmX, SkTileMode::kLastTileMode);
fuzz->nextEnum(&tmY, SkTileMode::kLastTileMode);
fuzz->next(&useMatrix);
if (useMatrix) {
FuzzNiceMatrix(fuzz, &matrix);
}
return img->makeShader(tmX, tmY, SkSamplingOptions(), useMatrix ? &matrix : nullptr);
case 5:
shader1 = make_fuzz_shader(fuzz, depth - 1); // limit recursion.
FuzzNiceMatrix(fuzz, &matrix);
return shader1 ? shader1->makeWithLocalMatrix(matrix) : nullptr;
case 6:
shader1 = make_fuzz_shader(fuzz, depth - 1); // limit recursion.
colorFilter = make_fuzz_colorfilter(fuzz, depth - 1);
return shader1 ? shader1->makeWithColorFilter(std::move(colorFilter)) : nullptr;
case 7:
shader1 = make_fuzz_shader(fuzz, depth - 1); // limit recursion.
shader2 = make_fuzz_shader(fuzz, depth - 1);
fuzz->nextEnum(&blendMode, SkBlendMode::kLastMode);
return SkShaders::Blend(blendMode, std::move(shader1), std::move(shader2));
case 8: {
auto pic = make_fuzz_picture(fuzz, depth - 1);
bool useTile;
SkRect tile;
fuzz->nextEnum(&tmX, SkTileMode::kLastTileMode);
fuzz->nextEnum(&tmY, SkTileMode::kLastTileMode);
fuzz->next(&useMatrix, &useTile);
if (useMatrix) {
FuzzNiceMatrix(fuzz, &matrix);
}
if (useTile) {
fuzz->next(&tile);
}
return pic->makeShader(tmX, tmY, SkFilterMode::kNearest,
useMatrix ? &matrix : nullptr, useTile ? &tile : nullptr);
}
// EFFECTS:
case 9:
// Deprecated SkGaussianEdgeShader
return nullptr;
case 10: {
constexpr int kMaxColors = 12;
SkPoint pts[2];
SkColor colors[kMaxColors];
SkScalar pos[kMaxColors];
int colorCount;
bool usePos;
fuzz->nextN(pts, 2);
fuzz->nextRange(&colorCount, 2, kMaxColors);
fuzz->nextN(colors, colorCount);
fuzz->nextEnum(&tmX, SkTileMode::kLastTileMode);
fuzz->next(&useMatrix, &usePos);
if (useMatrix) {
FuzzNiceMatrix(fuzz, &matrix);
}
if (usePos) {
fuzz_gradient_stops(fuzz, pos, colorCount);
}
return SkGradientShader::MakeLinear(pts, colors, usePos ? pos : nullptr, colorCount,
tmX, 0, useMatrix ? &matrix : nullptr);
}
case 11: {
constexpr int kMaxColors = 12;
SkPoint center;
SkScalar radius;
int colorCount;
bool usePos;
SkColor colors[kMaxColors];
SkScalar pos[kMaxColors];
fuzz->nextEnum(&tmX, SkTileMode::kLastTileMode);
fuzz->next(&useMatrix, &usePos, ¢er, &radius);
fuzz->nextRange(&colorCount, 2, kMaxColors);
fuzz->nextN(colors, colorCount);
if (useMatrix) {
FuzzNiceMatrix(fuzz, &matrix);
}
if (usePos) {
fuzz_gradient_stops(fuzz, pos, colorCount);
}
return SkGradientShader::MakeRadial(center, radius, colors, usePos ? pos : nullptr,
colorCount, tmX, 0, useMatrix ? &matrix : nullptr);
}
case 12: {
constexpr int kMaxColors = 12;
SkPoint start, end;
SkScalar startRadius, endRadius;
int colorCount;
bool usePos;
SkColor colors[kMaxColors];
SkScalar pos[kMaxColors];
fuzz->nextEnum(&tmX, SkTileMode::kLastTileMode);
fuzz->next(&useMatrix, &usePos, &startRadius, &endRadius, &start, &end);
fuzz->nextRange(&colorCount, 2, kMaxColors);
fuzz->nextN(colors, colorCount);
if (useMatrix) {
FuzzNiceMatrix(fuzz, &matrix);
}
if (usePos) {
fuzz_gradient_stops(fuzz, pos, colorCount);
}
return SkGradientShader::MakeTwoPointConical(start, startRadius, end, endRadius, colors,
usePos ? pos : nullptr, colorCount, tmX, 0,
useMatrix ? &matrix : nullptr);
}
case 13: {
constexpr int kMaxColors = 12;
SkScalar cx, cy;
int colorCount;
bool usePos;
SkColor colors[kMaxColors];
SkScalar pos[kMaxColors];
fuzz->next(&cx, &cy, &useMatrix, &usePos);
fuzz->nextRange(&colorCount, 2, kMaxColors);
fuzz->nextN(colors, colorCount);
if (useMatrix) {
FuzzNiceMatrix(fuzz, &matrix);
}
if (usePos) {
fuzz_gradient_stops(fuzz, pos, colorCount);
}
return SkGradientShader::MakeSweep(cx, cy, colors, usePos ? pos : nullptr, colorCount,
0, useMatrix ? &matrix : nullptr);
}
case 14: {
SkScalar baseFrequencyX, baseFrequencyY, seed;
int numOctaves;
SkISize tileSize;
bool useTileSize, turbulence;
fuzz->next(&baseFrequencyX, &baseFrequencyY, &seed, &useTileSize, &turbulence);
if (useTileSize) {
fuzz->next(&tileSize);
}
fuzz->nextRange(&numOctaves, 2, 7);
if (turbulence) {
return SkShaders::MakeTurbulence(baseFrequencyX,
baseFrequencyY,
numOctaves,
seed,
useTileSize ? &tileSize : nullptr);
} else {
return SkShaders::MakeFractalNoise(baseFrequencyX,
baseFrequencyY,
numOctaves,
seed,
useTileSize ? &tileSize : nullptr);
}
}
default:
SkASSERT(false);
break;
}
return nullptr;
}
static sk_sp<SkPathEffect> make_fuzz_patheffect(Fuzz* fuzz, int depth) {
if (depth <= 0) {
return nullptr;
}
uint8_t pathEffectType;
fuzz->nextRange(&pathEffectType, 0, 8);
switch (pathEffectType) {
case 0: {
return nullptr;
}
case 1: {
sk_sp<SkPathEffect> first = make_fuzz_patheffect(fuzz, depth - 1);
sk_sp<SkPathEffect> second = make_fuzz_patheffect(fuzz, depth - 1);
return SkPathEffect::MakeSum(std::move(first), std::move(second));
}
case 2: {
sk_sp<SkPathEffect> first = make_fuzz_patheffect(fuzz, depth - 1);
sk_sp<SkPathEffect> second = make_fuzz_patheffect(fuzz, depth - 1);
return SkPathEffect::MakeCompose(std::move(first), std::move(second));
}
case 3: {
SkPath path;
FuzzNicePath(fuzz, &path, 20);
SkScalar advance, phase;
fuzz->next(&advance, &phase);
SkPath1DPathEffect::Style style;
fuzz->nextEnum(&style, SkPath1DPathEffect::kLastEnum_Style);
return SkPath1DPathEffect::Make(path, advance, phase, style);
}
case 4: {
SkScalar width;
SkMatrix matrix;
fuzz->next(&width);
FuzzNiceMatrix(fuzz, &matrix);
return SkLine2DPathEffect::Make(width, matrix);
}
case 5: {
SkPath path;
FuzzNicePath(fuzz, &path, 20);
SkMatrix matrix;
FuzzNiceMatrix(fuzz, &matrix);
return SkPath2DPathEffect::Make(matrix, path);
}
case 6: {
SkScalar radius;
fuzz->next(&radius);
return SkCornerPathEffect::Make(radius);
}
case 7: {
SkScalar phase;
fuzz->next(&phase);
SkScalar intervals[20];
int count;
fuzz->nextRange(&count, 0, (int)std::size(intervals));
fuzz->nextN(intervals, count);
return SkDashPathEffect::Make(intervals, count, phase);
}
case 8: {
SkScalar segLength, dev;
uint32_t seed;
fuzz->next(&segLength, &dev, &seed);
return SkDiscretePathEffect::Make(segLength, dev, seed);
}
default:
SkASSERT(false);
return nullptr;
}
}
static sk_sp<SkMaskFilter> make_fuzz_maskfilter(Fuzz* fuzz) {
int maskfilterType;
fuzz->nextRange(&maskfilterType, 0, 1);
switch (maskfilterType) {
case 0:
return nullptr;
case 1: {
SkBlurStyle blurStyle;
fuzz->nextEnum(&blurStyle, kLastEnum_SkBlurStyle);
SkScalar sigma;
fuzz->next(&sigma);
bool respectCTM;
fuzz->next(&respectCTM);
return SkMaskFilter::MakeBlur(blurStyle, sigma, respectCTM);
}
default:
SkASSERT(false);
return nullptr;
}
}
static sk_sp<SkTypeface> make_fuzz_typeface(Fuzz* fuzz) {
if (make_fuzz_t<bool>(fuzz)) {
return nullptr;
}
sk_sp<SkFontMgr> mgr = ToolUtils::TestFontMgr();
int familyCount = mgr->countFamilies();
int i, j;
fuzz->nextRange(&i, 0, familyCount - 1);
sk_sp<SkFontStyleSet> family(mgr->createStyleSet(i));
int styleCount = family->count();
fuzz->nextRange(&j, 0, styleCount - 1);
return sk_sp<SkTypeface>(family->createTypeface(j));
}
static sk_sp<SkImageFilter> make_fuzz_imageFilter(Fuzz* fuzz, int depth);
static sk_sp<SkImageFilter> make_fuzz_lighting_imagefilter(Fuzz* fuzz, int depth) {
if (depth <= 0) {
return nullptr;
}
uint8_t imageFilterType;
fuzz->nextRange(&imageFilterType, 1, 6);
SkPoint3 p, q;
SkColor lightColor;
SkScalar surfaceScale, k, specularExponent, cutoffAngle, shininess;
sk_sp<SkImageFilter> input;
SkIRect cropRect;
bool useCropRect;
fuzz->next(&useCropRect);
if (useCropRect) {
fuzz->next(&cropRect);
}
switch (imageFilterType) {
case 1:
fuzz->next(&p, &lightColor, &surfaceScale, &k);
input = make_fuzz_imageFilter(fuzz, depth - 1);
return SkImageFilters::DistantLitDiffuse(p, lightColor, surfaceScale, k,
std::move(input),
useCropRect ? &cropRect : nullptr);
case 2:
fuzz->next(&p, &lightColor, &surfaceScale, &k);
input = make_fuzz_imageFilter(fuzz, depth - 1);
return SkImageFilters::PointLitDiffuse(p, lightColor, surfaceScale, k,
std::move(input),
useCropRect ? &cropRect : nullptr);
case 3:
fuzz->next(&p, &q, &specularExponent, &cutoffAngle, &lightColor, &surfaceScale, &k);
input = make_fuzz_imageFilter(fuzz, depth - 1);
return SkImageFilters::SpotLitDiffuse(
p, q, specularExponent, cutoffAngle, lightColor, surfaceScale, k,
std::move(input), useCropRect ? &cropRect : nullptr);
case 4:
fuzz->next(&p, &lightColor, &surfaceScale, &k, &shininess);
input = make_fuzz_imageFilter(fuzz, depth - 1);
return SkImageFilters::DistantLitSpecular(p, lightColor, surfaceScale, k,
shininess, std::move(input),
useCropRect ? &cropRect : nullptr);
case 5:
fuzz->next(&p, &lightColor, &surfaceScale, &k, &shininess);
input = make_fuzz_imageFilter(fuzz, depth - 1);
return SkImageFilters::PointLitSpecular(p, lightColor, surfaceScale, k,
shininess, std::move(input),
useCropRect ? &cropRect : nullptr);
case 6:
fuzz->next(&p, &q, &specularExponent, &cutoffAngle, &lightColor, &surfaceScale, &k,
&shininess);
input = make_fuzz_imageFilter(fuzz, depth - 1);
return SkImageFilters::SpotLitSpecular(
p, q, specularExponent, cutoffAngle, lightColor, surfaceScale, k, shininess,
std::move(input), useCropRect ? &cropRect : nullptr);
default:
SkASSERT(false);
return nullptr;
}
}
static void fuzz_paint(Fuzz* fuzz, SkPaint* paint, int depth);
static SkSamplingOptions next_sampling(Fuzz* fuzz) {
if (fuzz->nextBool()) {
float B, C;
fuzz->next(&B, &C);
return SkSamplingOptions({B, C});
} else {
SkFilterMode fm;
SkMipmapMode mm;
fuzz->nextEnum(&fm, SkFilterMode::kLast);
fuzz->nextEnum(&mm, SkMipmapMode::kLast);
return SkSamplingOptions(fm, mm);
}
}
static sk_sp<SkImageFilter> make_fuzz_imageFilter(Fuzz* fuzz, int depth) {
if (depth <= 0) {
return nullptr;
}
uint8_t imageFilterType;
fuzz->nextRange(&imageFilterType, 0, 22);
switch (imageFilterType) {
case 0:
return nullptr;
case 1: {
SkScalar sigmaX, sigmaY;
sk_sp<SkImageFilter> input = make_fuzz_imageFilter(fuzz, depth - 1);
bool useCropRect;
fuzz->next(&sigmaX, &sigmaY, &useCropRect);
SkIRect cropRect;
if (useCropRect) {
fuzz->next(&cropRect);
}
return SkImageFilters::Blur(sigmaX, sigmaY, std::move(input),
useCropRect ? &cropRect : nullptr);
}
case 2: {
SkMatrix matrix;
FuzzNiceMatrix(fuzz, &matrix);
const auto sampling = next_sampling(fuzz);
sk_sp<SkImageFilter> input = make_fuzz_imageFilter(fuzz, depth - 1);
return SkImageFilters::MatrixTransform(matrix, sampling, std::move(input));
}
case 3: {
float k1, k2, k3, k4;
bool enforcePMColor;
bool useCropRect;
fuzz->next(&k1, &k2, &k3, &k4, &enforcePMColor, &useCropRect);
sk_sp<SkImageFilter> background = make_fuzz_imageFilter(fuzz, depth - 1);
sk_sp<SkImageFilter> foreground = make_fuzz_imageFilter(fuzz, depth - 1);
SkIRect cropRect;
if (useCropRect) {
fuzz->next(&cropRect);
}
return SkImageFilters::Arithmetic(k1, k2, k3, k4, enforcePMColor,
std::move(background), std::move(foreground),
useCropRect ? &cropRect : nullptr);
}
case 4: {
sk_sp<SkColorFilter> cf = make_fuzz_colorfilter(fuzz, depth - 1);
sk_sp<SkImageFilter> input = make_fuzz_imageFilter(fuzz, depth - 1);
bool useCropRect;
SkIRect cropRect;
fuzz->next(&useCropRect);
if (useCropRect) {
fuzz->next(&cropRect);
}
return SkImageFilters::ColorFilter(std::move(cf), std::move(input),
useCropRect ? &cropRect : nullptr);
}
case 5: {
sk_sp<SkImageFilter> ifo = make_fuzz_imageFilter(fuzz, depth - 1);
sk_sp<SkImageFilter> ifi = make_fuzz_imageFilter(fuzz, depth - 1);
return SkImageFilters::Compose(std::move(ifo), std::move(ifi));
}
case 6: {
SkColorChannel xChannelSelector, yChannelSelector;
fuzz->nextEnum(&xChannelSelector, SkColorChannel::kLastEnum);
fuzz->nextEnum(&yChannelSelector, SkColorChannel::kLastEnum);
SkScalar scale;
bool useCropRect;
fuzz->next(&scale, &useCropRect);
SkIRect cropRect;
if (useCropRect) {
fuzz->next(&cropRect);
}
sk_sp<SkImageFilter> displacement = make_fuzz_imageFilter(fuzz, depth - 1);
sk_sp<SkImageFilter> color = make_fuzz_imageFilter(fuzz, depth - 1);
return SkImageFilters::DisplacementMap(xChannelSelector, yChannelSelector, scale,
std::move(displacement), std::move(color),
useCropRect ? &cropRect : nullptr);
}
case 7: {
SkScalar dx, dy, sigmaX, sigmaY;
SkColor color;
bool shadowOnly, useCropRect;
fuzz->next(&dx, &dy, &sigmaX, &sigmaY, &color, &shadowOnly, &useCropRect);
SkIRect cropRect;
if (useCropRect) {
fuzz->next(&cropRect);
}
sk_sp<SkImageFilter> input = make_fuzz_imageFilter(fuzz, depth - 1);
if (shadowOnly) {
return SkImageFilters::DropShadowOnly(dx, dy, sigmaX, sigmaY, color,
std::move(input),
useCropRect ? &cropRect : nullptr);
} else {
return SkImageFilters::DropShadow(dx, dy, sigmaX, sigmaY, color, std::move(input),
useCropRect ? &cropRect : nullptr);
}
}
case 8:
return SkImageFilters::Image(make_fuzz_image(fuzz), SkCubicResampler::Mitchell());
case 9: {
sk_sp<SkImage> image = make_fuzz_image(fuzz);
SkRect srcRect, dstRect;
fuzz->next(&srcRect, &dstRect);
return SkImageFilters::Image(std::move(image), srcRect, dstRect, next_sampling(fuzz));
}
case 10:
return make_fuzz_lighting_imagefilter(fuzz, depth - 1);
case 11: {
SkRect lensBounds;
SkScalar zoomAmount;
SkScalar inset;
bool useCropRect;
SkIRect cropRect;
fuzz->next(&lensBounds, &zoomAmount, &inset, &useCropRect);
if (useCropRect) {
fuzz->next(&cropRect);
}
sk_sp<SkImageFilter> input = make_fuzz_imageFilter(fuzz, depth - 1);
const auto sampling = next_sampling(fuzz);
return SkImageFilters::Magnifier(lensBounds, zoomAmount, inset, sampling,
std::move(input), useCropRect ? &cropRect : nullptr);
}
case 12: {
constexpr int kMaxKernelSize = 5;
int32_t n, m;
fuzz->nextRange(&n, 1, kMaxKernelSize);
fuzz->nextRange(&m, 1, kMaxKernelSize);
SkScalar kernel[kMaxKernelSize * kMaxKernelSize];
fuzz->nextN(kernel, n * m);
int32_t offsetX, offsetY;
fuzz->nextRange(&offsetX, 0, n - 1);
fuzz->nextRange(&offsetY, 0, m - 1);
SkScalar gain, bias;
bool convolveAlpha, useCropRect;
fuzz->next(&gain, &bias, &convolveAlpha, &useCropRect);
SkTileMode tileMode;
fuzz->nextEnum(&tileMode, SkTileMode::kLastTileMode);
SkIRect cropRect;
if (useCropRect) {
fuzz->next(&cropRect);
}
sk_sp<SkImageFilter> input = make_fuzz_imageFilter(fuzz, depth - 1);
return SkImageFilters::MatrixConvolution(
SkISize{n, m}, kernel, gain, bias, SkIPoint{offsetX, offsetY}, tileMode,
convolveAlpha, std::move(input), useCropRect ? &cropRect : nullptr);
}
case 13: {
sk_sp<SkImageFilter> first = make_fuzz_imageFilter(fuzz, depth - 1);
sk_sp<SkImageFilter> second = make_fuzz_imageFilter(fuzz, depth - 1);
bool useCropRect;
fuzz->next(&useCropRect);
SkIRect cropRect;
if (useCropRect) {
fuzz->next(&cropRect);
}
return SkImageFilters::Merge(std::move(first), std::move(second),
useCropRect ? &cropRect : nullptr);
}
case 14: {
constexpr int kMaxCount = 4;
sk_sp<SkImageFilter> ifs[kMaxCount];
int count;
fuzz->nextRange(&count, 1, kMaxCount);
for (int i = 0; i < count; ++i) {
ifs[i] = make_fuzz_imageFilter(fuzz, depth - 1);
}
bool useCropRect;
fuzz->next(&useCropRect);
SkIRect cropRect;
if (useCropRect) {
fuzz->next(&cropRect);
}
return SkImageFilters::Merge(ifs, count, useCropRect ? &cropRect : nullptr);
}
case 15: {
int rx, ry;
fuzz->next(&rx, &ry);
bool useCropRect;
fuzz->next(&useCropRect);
SkIRect cropRect;
if (useCropRect) {
fuzz->next(&cropRect);
}
sk_sp<SkImageFilter> input = make_fuzz_imageFilter(fuzz, depth - 1);
return SkImageFilters::Dilate(rx, ry, std::move(input),
useCropRect ? &cropRect : nullptr);
}
case 16: {
int rx, ry;
fuzz->next(&rx, &ry);
bool useCropRect;
fuzz->next(&useCropRect);
SkIRect cropRect;
if (useCropRect) {
fuzz->next(&cropRect);
}
sk_sp<SkImageFilter> input = make_fuzz_imageFilter(fuzz, depth - 1);
return SkImageFilters::Erode(rx, ry, std::move(input),
useCropRect ? &cropRect : nullptr);
}
case 17: {
SkScalar dx, dy;
fuzz->next(&dx, &dy);
bool useCropRect;
fuzz->next(&useCropRect);
SkIRect cropRect;
if (useCropRect) {
fuzz->next(&cropRect);
}
sk_sp<SkImageFilter> input = make_fuzz_imageFilter(fuzz, depth - 1);
return SkImageFilters::Offset(dx, dy, std::move(input),
useCropRect ? &cropRect : nullptr);
}
case 18: {
sk_sp<SkPicture> picture = make_fuzz_picture(fuzz, depth - 1);
return SkImageFilters::Picture(std::move(picture));
}
case 19: {
SkRect cropRect;
fuzz->next(&cropRect);
sk_sp<SkPicture> picture = make_fuzz_picture(fuzz, depth - 1);
return SkImageFilters::Picture(std::move(picture), cropRect);
}
case 20: {
SkRect src, dst;
fuzz->next(&src, &dst);
sk_sp<SkImageFilter> input = make_fuzz_imageFilter(fuzz, depth - 1);
return SkImageFilters::Tile(src, dst, std::move(input));
}
case 21: {
SkBlendMode blendMode;
bool useCropRect;
fuzz->next(&useCropRect);
fuzz->nextEnum(&blendMode, SkBlendMode::kLastMode);
SkIRect cropRect;
if (useCropRect) {
fuzz->next(&cropRect);
}
sk_sp<SkImageFilter> bg = make_fuzz_imageFilter(fuzz, depth - 1);
sk_sp<SkImageFilter> fg = make_fuzz_imageFilter(fuzz, depth - 1);
return SkImageFilters::Blend(blendMode, std::move(bg), std::move(fg),
useCropRect ? &cropRect : nullptr);
}
case 22: {
sk_sp<SkShader> shader = make_fuzz_shader(fuzz, depth - 1);
bool useCropRect;
fuzz->next(&useCropRect);
SkIRect cropRect;
if (useCropRect) {
fuzz->next(&cropRect);
}
return SkImageFilters::Shader(std::move(shader), useCropRect ? &cropRect : nullptr);
}
default:
SkASSERT(false);
return nullptr;
}
}
static sk_sp<SkImage> make_fuzz_image(Fuzz* fuzz) {
int w, h;
fuzz->nextRange(&w, 1, 1024);
fuzz->nextRange(&h, 1, 1024);
AutoTMalloc<SkPMColor> data(w * h);
SkPixmap pixmap(SkImageInfo::MakeN32Premul(w, h), data.get(), w * sizeof(SkPMColor));
int n = w * h;
for (int i = 0; i < n; ++i) {
SkColor c;
fuzz->next(&c);
data[i] = SkPreMultiplyColor(c);
}
(void)data.release();
return SkImages::RasterFromPixmap(
pixmap, [](const void* p, void*) { sk_free(const_cast<void*>(p)); }, nullptr);
}
template <typename T>
static T make_fuzz_enum_range(Fuzz* fuzz, T maxv) {
T value;
fuzz->nextEnum(&value, maxv);
return value;
}
static void fuzz_paint(Fuzz* fuzz, SkPaint* paint, int depth) {
if (!fuzz || !paint || depth <= 0) {
return;
}
paint->setAntiAlias( make_fuzz_t<bool>(fuzz));
paint->setDither( make_fuzz_t<bool>(fuzz));
paint->setColor( make_fuzz_t<SkColor>(fuzz));
paint->setBlendMode( make_fuzz_enum_range<SkBlendMode>(fuzz, SkBlendMode::kLastMode));
paint->setStyle( make_fuzz_enum_range<SkPaint::Style>(fuzz,
SkPaint::Style::kStrokeAndFill_Style));
paint->setShader( make_fuzz_shader(fuzz, depth - 1));
paint->setPathEffect( make_fuzz_patheffect(fuzz, depth - 1));
paint->setMaskFilter( make_fuzz_maskfilter(fuzz));
paint->setImageFilter( make_fuzz_imageFilter(fuzz, depth - 1));
paint->setColorFilter( make_fuzz_colorfilter(fuzz, depth - 1));
if (paint->getStyle() != SkPaint::kFill_Style) {
paint->setStrokeWidth(make_fuzz_t<SkScalar>(fuzz));
paint->setStrokeMiter(make_fuzz_t<SkScalar>(fuzz));
paint->setStrokeCap( make_fuzz_enum_range<SkPaint::Cap>(fuzz, SkPaint::kLast_Cap));
paint->setStrokeJoin( make_fuzz_enum_range<SkPaint::Join>(fuzz, SkPaint::kLast_Join));
}
}
static SkFont fuzz_font(Fuzz* fuzz) {
SkFont font;
font.setTypeface( make_fuzz_typeface(fuzz));
font.setSize( make_fuzz_t<SkScalar>(fuzz));
font.setScaleX( make_fuzz_t<SkScalar>(fuzz));
font.setSkewX( make_fuzz_t<SkScalar>(fuzz));
font.setLinearMetrics( make_fuzz_t<bool>(fuzz));
font.setSubpixel( make_fuzz_t<bool>(fuzz));
font.setEmbeddedBitmaps( make_fuzz_t<bool>(fuzz));
font.setForceAutoHinting( make_fuzz_t<bool>(fuzz));
font.setEmbolden( make_fuzz_t<bool>(fuzz));
font.setHinting( make_fuzz_enum_range<SkFontHinting>(fuzz, SkFontHinting::kFull));
font.setEdging( make_fuzz_enum_range<SkFont::Edging>(fuzz,
SkFont::Edging::kSubpixelAntiAlias));
return font;
}
static SkTextEncoding fuzz_paint_text_encoding(Fuzz* fuzz) {
return make_fuzz_enum_range<SkTextEncoding>(fuzz, SkTextEncoding::kUTF32);
}
constexpr int kMaxGlyphCount = 30;
static SkTDArray<uint8_t> make_fuzz_text(Fuzz* fuzz, const SkFont& font, SkTextEncoding encoding) {
SkTDArray<uint8_t> array;
if (SkTextEncoding::kGlyphID == encoding) {
int glyphRange = font.getTypeface()->countGlyphs();
if (glyphRange == 0) {
// Some fuzzing environments have no fonts, so empty array is the best
// we can do.
return array;
}
int glyphCount;
fuzz->nextRange(&glyphCount, 1, kMaxGlyphCount);
SkGlyphID* glyphs = (SkGlyphID*)array.append(glyphCount * sizeof(SkGlyphID));
for (int i = 0; i < glyphCount; ++i) {
fuzz->nextRange(&glyphs[i], 0, glyphRange - 1);
}
return array;
}
static const SkUnichar ranges[][2] = {
{0x0020, 0x007F},
{0x00A1, 0x0250},
{0x0400, 0x0500},
};
int32_t count = 0;
for (size_t i = 0; i < std::size(ranges); ++i) {
count += (ranges[i][1] - ranges[i][0]);
}
constexpr int kMaxLength = kMaxGlyphCount;
SkUnichar buffer[kMaxLength];
int length;
fuzz->nextRange(&length, 1, kMaxLength);
for (int j = 0; j < length; ++j) {
int32_t value;
fuzz->nextRange(&value, 0, count - 1);
for (size_t i = 0; i < std::size(ranges); ++i) {
if (value + ranges[i][0] < ranges[i][1]) {
buffer[j] = value + ranges[i][0];
break;
} else {
value -= (ranges[i][1] - ranges[i][0]);
}
}
}
switch (encoding) {
case SkTextEncoding::kUTF8: {
size_t utf8len = 0;
for (int j = 0; j < length; ++j) {
utf8len += SkUTF::ToUTF8(buffer[j], nullptr);
}
char* ptr = (char*)array.append(utf8len);
for (int j = 0; j < length; ++j) {
ptr += SkUTF::ToUTF8(buffer[j], ptr);
}
} break;
case SkTextEncoding::kUTF16: {
size_t utf16len = 0;
for (int j = 0; j < length; ++j) {
utf16len += SkUTF::ToUTF16(buffer[j]);
}
uint16_t* ptr = (uint16_t*)array.append(utf16len * sizeof(uint16_t));
for (int j = 0; j < length; ++j) {
ptr += SkUTF::ToUTF16(buffer[j], ptr);
}
} break;
case SkTextEncoding::kUTF32:
memcpy(array.append(length * sizeof(SkUnichar)), buffer, length * sizeof(SkUnichar));
break;
default:
SkASSERT(false);
break;
}
return array;
}
static std::string make_fuzz_string(Fuzz* fuzz) {
int len;
fuzz->nextRange(&len, 0, kMaxGlyphCount);
std::string str(len, 0);
for (int i = 0; i < len; i++) {
fuzz->next(&str[i]);
}
return str;
}
static sk_sp<SkTextBlob> make_fuzz_textblob(Fuzz* fuzz) {
SkTextBlobBuilder textBlobBuilder;
int8_t runCount;
fuzz->nextRange(&runCount, (int8_t)1, (int8_t)8);
while (runCount-- > 0) {
SkFont font = ToolUtils::DefaultFont();
SkTextEncoding encoding = fuzz_paint_text_encoding(fuzz);
font.setEdging(make_fuzz_t<bool>(fuzz) ? SkFont::Edging::kAlias : SkFont::Edging::kAntiAlias);
SkTDArray<uint8_t> text = make_fuzz_text(fuzz, font, encoding);
int glyphCount = font.countText(text.begin(), SkToSizeT(text.size()), encoding);
SkASSERT(glyphCount <= kMaxGlyphCount);
SkScalar x, y;
const SkTextBlobBuilder::RunBuffer* buffer;
uint8_t runType;
fuzz->nextRange(&runType, (uint8_t)0, (uint8_t)2);
const void* textPtr = text.begin();
size_t textLen = SkToSizeT(text.size());
switch (runType) {
case 0:
fuzz->next(&x, &y);
// TODO: Test other variations of this.
buffer = &textBlobBuilder.allocRun(font, glyphCount, x, y);
(void)font.textToGlyphs(textPtr, textLen, encoding, buffer->glyphs, glyphCount);
break;
case 1:
fuzz->next(&y);
// TODO: Test other variations of this.
buffer = &textBlobBuilder.allocRunPosH(font, glyphCount, y);
(void)font.textToGlyphs(textPtr, textLen, encoding, buffer->glyphs, glyphCount);
fuzz->nextN(buffer->pos, glyphCount);
break;
case 2:
// TODO: Test other variations of this.
buffer = &textBlobBuilder.allocRunPos(font, glyphCount);
(void)font.textToGlyphs(textPtr, textLen, encoding, buffer->glyphs, glyphCount);
fuzz->nextN(buffer->pos, glyphCount * 2);
break;
default:
SkASSERT(false);
break;
}
}
return textBlobBuilder.make();
}
static void fuzz_canvas(Fuzz* fuzz, SkCanvas* canvas, int depth = 9) {
if (!fuzz || !canvas || depth <= 0) {
return;
}
SkAutoCanvasRestore autoCanvasRestore(canvas, false);
unsigned N;