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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
#include "core/fpdfapi/parser/cpdf_stream_acc.h"
#include "core/fpdfapi/parser/fpdf_parser_decode.h"
CPDF_StreamAcc::CPDF_StreamAcc(const CPDF_Stream* pStream)
: m_pData(nullptr),
m_dwSize(0),
m_bNewBuf(false),
m_pImageParam(nullptr),
m_pStream(pStream),
m_pSrcData(nullptr) {}
void CPDF_StreamAcc::LoadAllData(bool bRawAccess,
uint32_t estimated_size,
bool bImageAcc) {
if (!m_pStream)
return;
if (m_pStream->IsMemoryBased() && (!m_pStream->HasFilter() || bRawAccess)) {
m_dwSize = m_pStream->GetRawSize();
m_pData = m_pStream->GetRawData();
return;
}
uint32_t dwSrcSize = m_pStream->GetRawSize();
if (dwSrcSize == 0)
return;
uint8_t* pSrcData;
if (!m_pStream->IsMemoryBased()) {
pSrcData = m_pSrcData = FX_Alloc(uint8_t, dwSrcSize);
if (!m_pStream->ReadRawData(0, pSrcData, dwSrcSize))
return;
} else {
pSrcData = m_pStream->GetRawData();
}
if (!m_pStream->HasFilter() || bRawAccess) {
m_pData = pSrcData;
m_dwSize = dwSrcSize;
} else if (!PDF_DataDecode(pSrcData, dwSrcSize, m_pStream->GetDict(),
estimated_size, bImageAcc, &m_pData, &m_dwSize,
&m_ImageDecoder, &m_pImageParam)) {
m_pData = pSrcData;
m_dwSize = dwSrcSize;
}
if (pSrcData != m_pStream->GetRawData() && pSrcData != m_pData)
FX_Free(pSrcData);
m_pSrcData = nullptr;
m_bNewBuf = m_pData != m_pStream->GetRawData();
}
CPDF_StreamAcc::~CPDF_StreamAcc() {
if (m_bNewBuf)
FX_Free(m_pData);
FX_Free(m_pSrcData);
}
const uint8_t* CPDF_StreamAcc::GetData() const {
if (m_bNewBuf)
return m_pData;
return m_pStream ? m_pStream->GetRawData() : nullptr;
}
uint32_t CPDF_StreamAcc::GetSize() const {
if (m_bNewBuf)
return m_dwSize;
return m_pStream ? m_pStream->GetRawSize() : 0;
}
std::unique_ptr<uint8_t, FxFreeDeleter> CPDF_StreamAcc::DetachData() {
if (m_bNewBuf) {
std::unique_ptr<uint8_t, FxFreeDeleter> p(m_pData);
m_pData = nullptr;
m_dwSize = 0;
return p;
}
std::unique_ptr<uint8_t, FxFreeDeleter> p(FX_Alloc(uint8_t, m_dwSize));
memcpy(p.get(), m_pData, m_dwSize);
return p;
}
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