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// Copyright 2016 The PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef TESTING_LIBFUZZER_XFA_CODEC_FUZZER_H_
#define TESTING_LIBFUZZER_XFA_CODEC_FUZZER_H_
#include <memory>
#include "core/fxcodec/codec/ccodec_progressivedecoder.h"
#include "core/fxcodec/fx_codec.h"
#include "core/fxcrt/fx_stream.h"
class XFACodecFuzzer {
public:
static int Fuzz(const uint8_t* data, size_t size, FXCODEC_IMAGE_TYPE type) {
std::unique_ptr<CCodec_ModuleMgr> mgr(new CCodec_ModuleMgr());
std::unique_ptr<CCodec_ProgressiveDecoder> decoder(
mgr->CreateProgressiveDecoder());
Reader source(data, size);
FXCODEC_STATUS status =
decoder->LoadImageInfo(&source, type, nullptr, true);
if (status != FXCODEC_STATUS_FRAME_READY)
return 0;
std::unique_ptr<CFX_DIBitmap> bitmap(new CFX_DIBitmap);
bitmap->Create(decoder->GetWidth(), decoder->GetHeight(), FXDIB_Argb);
int32_t frames;
if (decoder->GetFrames(frames) != FXCODEC_STATUS_DECODE_READY ||
frames == 0)
return 0;
status = decoder->StartDecode(bitmap.get(), 0, 0, bitmap->GetWidth(),
bitmap->GetHeight());
while (status == FXCODEC_STATUS_DECODE_TOBECONTINUE)
status = decoder->ContinueDecode();
return 0;
}
private:
class Reader : public IFX_SeekableReadStream {
public:
Reader(const uint8_t* data, size_t size) : m_data(data), m_size(size) {}
~Reader() {}
void Release() override {}
FX_BOOL ReadBlock(void* buffer, FX_FILESIZE offset, size_t size) override {
if (offset < 0 || offset >= m_size)
return FALSE;
if (offset + size > m_size)
size = m_size - offset;
if (size == 0)
return FALSE;
memcpy(buffer, m_data + offset, size);
return TRUE;
}
FX_FILESIZE GetSize() override { return static_cast<FX_FILESIZE>(m_size); }
private:
const uint8_t* const m_data;
size_t m_size;
};
};
#endif // TESTING_LIBFUZZER_XFA_CODEC_FUZZER_H_
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