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// Copyright 2016 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_PARSER_CPDF_STREAM_ACC_H_
#define CORE_FPDFAPI_PARSER_CPDF_STREAM_ACC_H_
#include <memory>
#include "core/fpdfapi/parser/cpdf_stream.h"
#include "core/fxcrt/fx_string.h"
#include "core/fxcrt/fx_system.h"
#include "core/fxcrt/maybe_owned.h"
#include "core/fxcrt/retain_ptr.h"
#include "third_party/base/span.h"
class CPDF_Dictionary;
class CPDF_StreamAcc final : public Retainable {
public:
template <typename T, typename... Args>
friend RetainPtr<T> pdfium::MakeRetain(Args&&... args);
CPDF_StreamAcc(const CPDF_StreamAcc&) = delete;
CPDF_StreamAcc& operator=(const CPDF_StreamAcc&) = delete;
void LoadAllDataFiltered();
void LoadAllDataFilteredWithEstimatedSize(uint32_t estimated_size);
void LoadAllDataImageAcc(uint32_t estimated_size);
void LoadAllDataRaw();
const CPDF_Stream* GetStream() const { return m_pStream.Get(); }
const CPDF_Dictionary* GetDict() const;
uint8_t* GetData() const;
uint32_t GetSize() const;
pdfium::span<uint8_t> GetSpan() const {
return pdfium::make_span(GetData(), GetSize());
}
ByteString GetImageDecoder() const { return m_ImageDecoder; }
const CPDF_Dictionary* GetImageParam() const { return m_pImageParam.Get(); }
std::unique_ptr<uint8_t, FxFreeDeleter> DetachData();
private:
explicit CPDF_StreamAcc(const CPDF_Stream* pStream);
~CPDF_StreamAcc() override;
void LoadAllData(bool bRawAccess, uint32_t estimated_size, bool bImageAcc);
void ProcessRawData();
void ProcessFilteredData(uint32_t estimated_size, bool bImageAcc);
// Reads the raw data from |m_pStream|, or return nullptr on failure.
std::unique_ptr<uint8_t, FxFreeDeleter> ReadRawStream() const;
MaybeOwned<uint8_t, FxFreeDeleter> m_pData;
uint32_t m_dwSize = 0;
ByteString m_ImageDecoder;
UnownedPtr<const CPDF_Dictionary> m_pImageParam;
UnownedPtr<const CPDF_Stream> const m_pStream;
};
#endif // CORE_FPDFAPI_PARSER_CPDF_STREAM_ACC_H_
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