| /* |
| * Copyright 2016 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 "include/core/SkCanvas.h" |
| #include "include/core/SkSurface.h" |
| #include "include/effects/SkGradientShader.h" |
| #include "src/base/SkTLazy.h" |
| #include "src/core/SkDebugUtils.h" |
| #include "tools/flags/CommandLineFlags.h" |
| |
| #include <algorithm> |
| #include <vector> |
| |
| static DEFINE_bool2(verbose, v, false, "log verbose linear gradient description"); |
| |
| const int MAX_COUNT = 400; |
| |
| void makeMatrix(Fuzz* fuzz, SkMatrix* m) { |
| SkScalar mat[9]; |
| fuzz->nextN(mat, 9); |
| m->set9(mat); |
| } |
| |
| void initGradientParams(Fuzz* fuzz, std::vector<SkColor>* colors, |
| std::vector<SkScalar>* pos, SkTileMode* mode) { |
| int count; |
| fuzz->nextRange(&count, 0, MAX_COUNT); |
| |
| // Use a uint8_t to conserve bytes. This makes our "fuzzed bytes footprint" |
| // smaller, which leads to more efficient fuzzing. |
| uint8_t m; |
| fuzz->nextRange(&m, 0, 2); |
| *mode = static_cast<SkTileMode>(m); |
| |
| colors->clear(); |
| pos ->clear(); |
| for (int i = 0; i < count; i++) { |
| SkColor c; |
| SkScalar s; |
| fuzz->next(&c, &s); |
| colors->push_back(c); |
| pos ->push_back(s); |
| } |
| if (count) { |
| std::sort(pos->begin(), pos->end()); |
| // The order matters. If count == 1, we want pos == 0. |
| (*pos)[count - 1] = 1; |
| (*pos)[0] = 0; |
| } |
| } |
| |
| static void logOptionalMatrix(const char* label, const SkMatrix* m) { |
| if (!m) { |
| return; |
| } |
| |
| SkDEBUGF(" %s: [ ", label); |
| for (int i = 0; i < 9; ++i) { |
| SkDEBUGF("%.9g ", m->get(i)); |
| } |
| SkDEBUGF("]\n"); |
| } |
| |
| static void logLinearGradient(const SkPoint pts[2], |
| const std::vector<SkColor>& colors, |
| const std::vector<SkScalar>& pos, |
| SkTileMode mode, |
| uint32_t flags, |
| const SkMatrix* localMatrix, |
| const SkMatrix* globalMatrix) { |
| if (!FLAGS_verbose) { |
| return; |
| } |
| |
| SkDebugf("--- fuzzLinearGradient ---\n"); |
| SkDebugf(" pts:\t\t[ (%.9g %.9g) (%.9g %.9g) ]\n", |
| pts[0].x(), pts[0].y(), pts[1].x(), pts[1].y()); |
| SkDebugf(" colors:\t[ "); |
| for (auto color : colors) { |
| SkDebugf("0x%x ", color); |
| } |
| |
| SkDebugf("]\n pos:\t\t"); |
| if (pos.empty()) { |
| SkDebugf("nullptr"); |
| } else { |
| SkDebugf("[ "); |
| for (auto p : pos) { |
| SkDebugf("%f ", p); |
| } |
| } |
| SkDebugf("]\n"); |
| |
| SkDebugf(" mode:\t\t%s\n", SkTileModeToStr(mode)); |
| SkDebugf(" flags:\t0x%x\n", flags); |
| logOptionalMatrix("local matrix", localMatrix); |
| logOptionalMatrix("global matrix", globalMatrix); |
| } |
| |
| void fuzzLinearGradient(Fuzz* fuzz) { |
| SkPoint pts[2]; |
| fuzz->next(&pts[0].fX, &pts[0].fY, &pts[1].fX, &pts[1].fY); |
| bool useLocalMatrix, useGlobalMatrix; |
| fuzz->next(&useLocalMatrix, &useGlobalMatrix); |
| |
| std::vector<SkColor> colors; |
| std::vector<SkScalar> pos; |
| SkTileMode mode; |
| initGradientParams(fuzz, &colors, &pos, &mode); |
| |
| SkPaint p; |
| uint32_t flags; |
| fuzz->next(&flags); |
| |
| SkTLazy<SkMatrix> localMatrix; |
| if (useLocalMatrix) { |
| makeMatrix(fuzz, localMatrix.init()); |
| } |
| p.setShader(SkGradientShader::MakeLinear(pts, colors.data(), pos.data(), |
| colors.size(), mode, flags, localMatrix.getMaybeNull())); |
| |
| sk_sp<SkSurface> surface(SkSurfaces::Raster(SkImageInfo::MakeN32Premul(50, 50))); |
| if (useGlobalMatrix) { |
| SkMatrix gm; |
| makeMatrix(fuzz, &gm); |
| logLinearGradient(pts, colors, pos, mode, flags, localMatrix.getMaybeNull(), &gm); |
| SkCanvas* c = surface->getCanvas(); |
| c->setMatrix(gm); |
| c->drawPaint(p); |
| } else { |
| logLinearGradient(pts, colors, pos, mode, flags, localMatrix.getMaybeNull(), nullptr); |
| surface->getCanvas()->drawPaint(p); |
| } |
| } |
| |
| void fuzzRadialGradient(Fuzz* fuzz) { |
| SkPoint center; |
| fuzz->next(¢er.fX, ¢er.fY); |
| SkScalar radius; |
| bool useLocalMatrix, useGlobalMatrix; |
| fuzz->next(&radius, &useLocalMatrix, &useGlobalMatrix); |
| |
| |
| std::vector<SkColor> colors; |
| std::vector<SkScalar> pos; |
| SkTileMode mode; |
| initGradientParams(fuzz, &colors, &pos, &mode); |
| |
| SkPaint p; |
| uint32_t flags; |
| fuzz->next(&flags); |
| |
| SkTLazy<SkMatrix> localMatrix; |
| if (useLocalMatrix) { |
| makeMatrix(fuzz, localMatrix.init()); |
| } |
| p.setShader(SkGradientShader::MakeRadial(center, radius, colors.data(), |
| pos.data(), colors.size(), mode, flags, localMatrix.getMaybeNull())); |
| |
| sk_sp<SkSurface> surface(SkSurfaces::Raster(SkImageInfo::MakeN32Premul(50, 50))); |
| if (useGlobalMatrix) { |
| SkMatrix gm; |
| makeMatrix(fuzz, &gm); |
| SkCanvas* c = surface->getCanvas(); |
| c->setMatrix(gm); |
| c->drawPaint(p); |
| } else { |
| surface->getCanvas()->drawPaint(p); |
| } |
| } |
| |
| void fuzzTwoPointConicalGradient(Fuzz* fuzz) { |
| SkPoint start; |
| fuzz->next(&start.fX, &start.fY); |
| SkPoint end; |
| fuzz->next(&end.fX, &end.fY); |
| SkScalar startRadius, endRadius; |
| bool useLocalMatrix, useGlobalMatrix; |
| fuzz->next(&startRadius, &endRadius, &useLocalMatrix, &useGlobalMatrix); |
| |
| std::vector<SkColor> colors; |
| std::vector<SkScalar> pos; |
| SkTileMode mode; |
| initGradientParams(fuzz, &colors, &pos, &mode); |
| |
| SkPaint p; |
| uint32_t flags; |
| fuzz->next(&flags); |
| |
| SkTLazy<SkMatrix> localMatrix; |
| if (useLocalMatrix) { |
| makeMatrix(fuzz, localMatrix.init()); |
| } |
| p.setShader(SkGradientShader::MakeTwoPointConical(start, startRadius, |
| end, endRadius, colors.data(), pos.data(), colors.size(), mode, |
| flags, localMatrix.getMaybeNull())); |
| |
| sk_sp<SkSurface> surface(SkSurfaces::Raster(SkImageInfo::MakeN32Premul(50, 50))); |
| if (useGlobalMatrix) { |
| SkMatrix gm; |
| makeMatrix(fuzz, &gm); |
| SkCanvas* c = surface->getCanvas(); |
| c->setMatrix(gm); |
| c->drawPaint(p); |
| } else { |
| surface->getCanvas()->drawPaint(p); |
| } |
| } |
| |
| void fuzzSweepGradient(Fuzz* fuzz) { |
| SkScalar cx, cy; |
| bool useLocalMatrix, useGlobalMatrix; |
| fuzz->next(&cx, &cy, &useLocalMatrix, &useGlobalMatrix); |
| |
| std::vector<SkColor> colors; |
| std::vector<SkScalar> pos; |
| SkTileMode mode; |
| initGradientParams(fuzz, &colors, &pos, &mode); |
| |
| SkPaint p; |
| if (useLocalMatrix) { |
| SkMatrix m; |
| makeMatrix(fuzz, &m); |
| uint32_t flags; |
| fuzz->next(&flags); |
| |
| p.setShader(SkGradientShader::MakeSweep(cx, cy, colors.data(), |
| pos.data(), colors.size(), flags, &m)); |
| } else { |
| p.setShader(SkGradientShader::MakeSweep(cx, cy, colors.data(), |
| pos.data(), colors.size())); |
| } |
| |
| sk_sp<SkSurface> surface(SkSurfaces::Raster(SkImageInfo::MakeN32Premul(50, 50))); |
| if (useGlobalMatrix) { |
| SkMatrix gm; |
| makeMatrix(fuzz, &gm); |
| SkCanvas* c = surface->getCanvas(); |
| c->setMatrix(gm); |
| c->drawPaint(p); |
| } else { |
| surface->getCanvas()->drawPaint(p); |
| } |
| } |
| |
| DEF_FUZZ(Gradients, fuzz) { |
| uint8_t i; |
| fuzz->next(&i); |
| |
| switch(i) { |
| case 0: |
| SkDEBUGF("LinearGradient\n"); |
| fuzzLinearGradient(fuzz); |
| return; |
| case 1: |
| SkDEBUGF("RadialGradient\n"); |
| fuzzRadialGradient(fuzz); |
| return; |
| case 2: |
| SkDEBUGF("TwoPointConicalGradient\n"); |
| fuzzTwoPointConicalGradient(fuzz); |
| return; |
| } |
| SkDEBUGF("SweepGradient\n"); |
| fuzzSweepGradient(fuzz); |
| return; |
| } |