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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/fpdf_parser/include/cpdf_stream_acc.h"
#include "core/fpdfapi/fpdf_parser/include/fpdf_parser_decode.h"
CPDF_StreamAcc::CPDF_StreamAcc()
: m_pData(nullptr),
m_dwSize(0),
m_bNewBuf(FALSE),
m_pImageParam(nullptr),
m_pStream(nullptr),
m_pSrcData(nullptr) {}
void CPDF_StreamAcc::LoadAllData(const CPDF_Stream* pStream,
FX_BOOL bRawAccess,
FX_DWORD estimated_size,
FX_BOOL bImageAcc) {
if (!pStream)
return;
m_pStream = pStream;
if (pStream->IsMemoryBased() &&
(!pStream->GetDict()->KeyExist("Filter") || bRawAccess)) {
m_dwSize = pStream->GetRawSize();
m_pData = pStream->GetRawData();
return;
}
uint8_t* pSrcData;
FX_DWORD dwSrcSize = pStream->GetRawSize();
if (dwSrcSize == 0)
return;
if (!pStream->IsMemoryBased()) {
pSrcData = m_pSrcData = FX_Alloc(uint8_t, dwSrcSize);
if (!pStream->ReadRawData(0, pSrcData, dwSrcSize))
return;
} else {
pSrcData = pStream->GetRawData();
}
uint8_t* pDecryptedData = pSrcData;
FX_DWORD dwDecryptedSize = dwSrcSize;
if (!pStream->GetDict()->KeyExist("Filter") || bRawAccess) {
m_pData = pDecryptedData;
m_dwSize = dwDecryptedSize;
} else {
FX_BOOL bRet = PDF_DataDecode(
pDecryptedData, dwDecryptedSize, m_pStream->GetDict(), m_pData,
m_dwSize, m_ImageDecoder, m_pImageParam, estimated_size, bImageAcc);
if (!bRet) {
m_pData = pDecryptedData;
m_dwSize = dwDecryptedSize;
}
}
if (pSrcData != pStream->GetRawData() && pSrcData != m_pData) {
FX_Free(pSrcData);
}
if (pDecryptedData != pSrcData && pDecryptedData != m_pData) {
FX_Free(pDecryptedData);
}
m_pSrcData = nullptr;
m_bNewBuf = m_pData != 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;
}
if (!m_pStream) {
return nullptr;
}
return m_pStream->GetRawData();
}
FX_DWORD CPDF_StreamAcc::GetSize() const {
if (m_bNewBuf) {
return m_dwSize;
}
if (!m_pStream) {
return 0;
}
return m_pStream->GetRawSize();
}
uint8_t* CPDF_StreamAcc::DetachData() {
if (m_bNewBuf) {
uint8_t* p = m_pData;
m_pData = nullptr;
m_dwSize = 0;
return p;
}
uint8_t* p = FX_Alloc(uint8_t, m_dwSize);
FXSYS_memcpy(p, m_pData, m_dwSize);
return p;
}
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