blob: 5836ce4c507bb31042b8889d282862c306b12cdb [file] [log] [blame]
/*
* 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/core/SkDebugUtils.h"
#include "src/core/SkTLazy.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(SkSurface::MakeRasterN32Premul(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(&center.fX, &center.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(SkSurface::MakeRasterN32Premul(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(SkSurface::MakeRasterN32Premul(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(SkSurface::MakeRasterN32Premul(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;
}