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64 lines
1.7 KiB
64 lines
1.7 KiB
4 months ago
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/*
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* Copyright 2018 Google, LLC
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "SkAndroidCodec.h"
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#include "SkBitmap.h"
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#include "SkCanvas.h"
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#include "SkData.h"
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#include "SkSurface.h"
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#include "../Fuzz.h"
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bool FuzzAndroidCodec(sk_sp<SkData> bytes, uint8_t sampleSize) {
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auto codec = SkAndroidCodec::MakeFromData(bytes);
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if (!codec) {
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return false;
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}
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auto size = codec->getSampledDimensions(sampleSize);
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auto info = SkImageInfo::MakeN32Premul(size);
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SkBitmap bm;
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if (!bm.tryAllocPixels(info)) {
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// May fail in memory-constrained fuzzing environments
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return false;
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}
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SkAndroidCodec::AndroidOptions options;
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options.fSampleSize = sampleSize;
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auto result = codec->getAndroidPixels(bm.info(), bm.getPixels(), bm.rowBytes(), &options);
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switch (result) {
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case SkCodec::kSuccess:
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case SkCodec::kIncompleteInput:
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case SkCodec::kErrorInInput:
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break;
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default:
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return false;
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}
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auto surface = SkSurface::MakeRasterN32Premul(size.width(), size.height());
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if (!surface) {
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// May return nullptr in memory-constrained fuzzing environments
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return false;
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}
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surface->getCanvas()->drawBitmap(bm, 0, 0);
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return true;
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}
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#if defined(IS_FUZZING_WITH_LIBFUZZER)
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extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
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auto bytes = SkData::MakeWithoutCopy(data, size);
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Fuzz fuzz(bytes);
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uint8_t sampleSize;
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fuzz.nextRange(&sampleSize, 1, 64);
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bytes = SkData::MakeSubset(bytes.get(), 1, size - 1);
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FuzzAndroidCodec(bytes, sampleSize);
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return 0;
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}
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#endif
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