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// Copyright 2017 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.
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
#ifndef CORE_FPDFAPI_EDIT_CPDF_FLATEENCODER_H_
#define CORE_FPDFAPI_EDIT_CPDF_FLATEENCODER_H_
#include <memory>
#include "core/fpdfapi/parser/cpdf_dictionary.h"
#include "core/fpdfapi/parser/cpdf_stream_acc.h"
#include "core/fxcrt/fx_memory.h"
#include "core/fxcrt/maybe_owned.h"
#include "core/fxcrt/retain_ptr.h"
#include "third_party/base/span.h"
class CPDF_Stream;
class CPDF_FlateEncoder {
public:
CPDF_FlateEncoder(const CPDF_Stream* pStream, bool bFlateEncode);
~CPDF_FlateEncoder();
void CloneDict();
CPDF_Dictionary* GetClonedDict();
// Returns |m_pClonedDict| if it is valid. Otherwise returns |m_pDict|.
const CPDF_Dictionary* GetDict() const;
pdfium::span<const uint8_t> GetSpan() const {
return pdfium::make_span(m_pData.Get(), m_dwSize);
}
private:
RetainPtr<CPDF_StreamAcc> m_pAcc;
uint32_t m_dwSize;
MaybeOwned<uint8_t, FxFreeDeleter> m_pData;
// Only one of these two pointers is valid at any time.
UnownedPtr<const CPDF_Dictionary> m_pDict;
std::unique_ptr<CPDF_Dictionary> m_pClonedDict;
};
#endif // CORE_FPDFAPI_EDIT_CPDF_FLATEENCODER_H_
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