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// Copyright 2016 The PDFium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <cstdint>
#include <memory>
#include "core/fxcodec/fax/faxmodule.h"
#include "core/fxcodec/scanlinedecoder.h"
#include "testing/fuzzers/pdfium_fuzzer_util.h"
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
static constexpr size_t kParameterSize = 21;
if (size < kParameterSize)
return 0;
// Limit data size to prevent fuzzer timeout.
static constexpr size_t kMaxDataSize = 256 * 1024;
if (size > kParameterSize + kMaxDataSize)
return 0;
int width = GetInteger(data);
int height = GetInteger(data + 4);
int K = GetInteger(data + 8);
int Columns = GetInteger(data + 12);
int Rows = GetInteger(data + 16);
bool EndOfLine = !(data[20] & 0x01);
bool ByteAlign = !(data[20] & 0x02);
// This controls if fxcodec::FaxDecoder::InvertBuffer() gets called.
// The method is not interesting, and calling it doubles the runtime.
const bool kBlackIs1 = false;
data += kParameterSize;
size -= kParameterSize;
std::unique_ptr<ScanlineDecoder> decoder =
FaxModule::CreateDecoder({data, size}, width, height, K, EndOfLine,
ByteAlign, kBlackIs1, Columns, Rows);
if (decoder) {
int line = 0;
while (!decoder->GetScanline(line).empty())
line++;
}
return 0;
}