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1 // Copyright 2016 PDFium Authors. All rights reserved. | 1 // Copyright 2016 PDFium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com | 5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com |
6 | 6 |
7 #include "core/fpdfapi/parser/cpdf_stream_acc.h" | 7 #include "core/fpdfapi/parser/cpdf_stream_acc.h" |
8 | 8 |
9 #include "core/fpdfapi/parser/fpdf_parser_decode.h" | 9 #include "core/fpdfapi/parser/fpdf_parser_decode.h" |
10 | 10 |
11 CPDF_StreamAcc::CPDF_StreamAcc() | 11 CPDF_StreamAcc::CPDF_StreamAcc() |
12 : m_pData(nullptr), | 12 : m_pData(nullptr), |
13 m_dwSize(0), | 13 m_dwSize(0), |
14 m_bNewBuf(false), | 14 m_bNewBuf(false), |
15 m_pImageParam(nullptr), | 15 m_pImageParam(nullptr), |
16 m_pStream(nullptr), | 16 m_pStream(nullptr), |
17 m_pSrcData(nullptr) {} | 17 m_pSrcData(nullptr) {} |
18 | 18 |
19 void CPDF_StreamAcc::LoadAllData(const CPDF_Stream* pStream, | 19 void CPDF_StreamAcc::LoadAllData(const CPDF_Stream* pStream, |
20 bool bRawAccess, | 20 bool bRawAccess, |
21 uint32_t estimated_size, | 21 uint32_t estimated_size, |
22 bool bImageAcc) { | 22 bool bImageAcc) { |
23 if (!pStream) | 23 if (!pStream) |
24 return; | 24 return; |
25 | 25 |
26 m_pStream = pStream; | 26 m_pStream = pStream; |
27 if (pStream->IsMemoryBased() && | 27 if (pStream->IsMemoryBased() && (!pStream->HasFilter() || bRawAccess)) { |
28 (!pStream->GetDict()->KeyExist("Filter") || bRawAccess)) { | |
29 m_dwSize = pStream->GetRawSize(); | 28 m_dwSize = pStream->GetRawSize(); |
30 m_pData = pStream->GetRawData(); | 29 m_pData = pStream->GetRawData(); |
31 return; | 30 return; |
32 } | 31 } |
33 uint8_t* pSrcData; | |
34 uint32_t dwSrcSize = pStream->GetRawSize(); | 32 uint32_t dwSrcSize = pStream->GetRawSize(); |
35 if (dwSrcSize == 0) | 33 if (dwSrcSize == 0) |
36 return; | 34 return; |
37 | 35 |
| 36 uint8_t* pSrcData; |
38 if (!pStream->IsMemoryBased()) { | 37 if (!pStream->IsMemoryBased()) { |
39 pSrcData = m_pSrcData = FX_Alloc(uint8_t, dwSrcSize); | 38 pSrcData = m_pSrcData = FX_Alloc(uint8_t, dwSrcSize); |
40 if (!pStream->ReadRawData(0, pSrcData, dwSrcSize)) | 39 if (!pStream->ReadRawData(0, pSrcData, dwSrcSize)) |
41 return; | 40 return; |
42 } else { | 41 } else { |
43 pSrcData = pStream->GetRawData(); | 42 pSrcData = pStream->GetRawData(); |
44 } | 43 } |
45 if (!pStream->GetDict()->KeyExist("Filter") || bRawAccess) { | 44 if (!pStream->HasFilter() || bRawAccess) { |
46 m_pData = pSrcData; | 45 m_pData = pSrcData; |
47 m_dwSize = dwSrcSize; | 46 m_dwSize = dwSrcSize; |
48 } else { | 47 } else if (!PDF_DataDecode(pSrcData, dwSrcSize, m_pStream->GetDict(), m_pData, |
49 bool bRet = PDF_DataDecode(pSrcData, dwSrcSize, m_pStream->GetDict(), | 48 m_dwSize, m_ImageDecoder, m_pImageParam, |
50 m_pData, m_dwSize, m_ImageDecoder, m_pImageParam, | 49 estimated_size, bImageAcc)) { |
51 estimated_size, bImageAcc); | 50 m_pData = pSrcData; |
52 if (!bRet) { | 51 m_dwSize = dwSrcSize; |
53 m_pData = pSrcData; | |
54 m_dwSize = dwSrcSize; | |
55 } | |
56 } | 52 } |
57 if (pSrcData != pStream->GetRawData() && pSrcData != m_pData) | 53 if (pSrcData != pStream->GetRawData() && pSrcData != m_pData) |
58 FX_Free(pSrcData); | 54 FX_Free(pSrcData); |
59 m_pSrcData = nullptr; | 55 m_pSrcData = nullptr; |
60 m_bNewBuf = m_pData != pStream->GetRawData(); | 56 m_bNewBuf = m_pData != pStream->GetRawData(); |
61 } | 57 } |
62 | 58 |
63 CPDF_StreamAcc::~CPDF_StreamAcc() { | 59 CPDF_StreamAcc::~CPDF_StreamAcc() { |
64 if (m_bNewBuf) | 60 if (m_bNewBuf) |
65 FX_Free(m_pData); | 61 FX_Free(m_pData); |
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82 if (m_bNewBuf) { | 78 if (m_bNewBuf) { |
83 uint8_t* p = m_pData; | 79 uint8_t* p = m_pData; |
84 m_pData = nullptr; | 80 m_pData = nullptr; |
85 m_dwSize = 0; | 81 m_dwSize = 0; |
86 return p; | 82 return p; |
87 } | 83 } |
88 uint8_t* p = FX_Alloc(uint8_t, m_dwSize); | 84 uint8_t* p = FX_Alloc(uint8_t, m_dwSize); |
89 FXSYS_memcpy(p, m_pData, m_dwSize); | 85 FXSYS_memcpy(p, m_pData, m_dwSize); |
90 return p; | 86 return p; |
91 } | 87 } |
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