1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
|
// 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/include/fpdfapi/cpdf_stream.h"
#include "core/include/fpdfapi/cpdf_dictionary.h"
#include "core/include/fpdfapi/fpdf_parser_decode.h"
CPDF_Stream::CPDF_Stream(uint8_t* pData, FX_DWORD size, CPDF_Dictionary* pDict)
: m_pDict(pDict),
m_dwSize(size),
m_GenNum(kMemoryBasedGenNum),
m_pDataBuf(pData) {}
CPDF_Stream::~CPDF_Stream() {
if (IsMemoryBased())
FX_Free(m_pDataBuf);
if (m_pDict)
m_pDict->Release();
}
CPDF_Object::Type CPDF_Stream::GetType() const {
return STREAM;
}
CPDF_Dictionary* CPDF_Stream::GetDict() const {
return m_pDict;
}
bool CPDF_Stream::IsStream() const {
return true;
}
CPDF_Stream* CPDF_Stream::AsStream() {
return this;
}
const CPDF_Stream* CPDF_Stream::AsStream() const {
return this;
}
void CPDF_Stream::InitStreamInternal(CPDF_Dictionary* pDict) {
if (pDict) {
if (m_pDict)
m_pDict->Release();
m_pDict = pDict;
}
if (IsMemoryBased())
FX_Free(m_pDataBuf);
m_GenNum = 0;
m_pFile = nullptr;
}
void CPDF_Stream::InitStream(uint8_t* pData,
FX_DWORD size,
CPDF_Dictionary* pDict) {
InitStreamInternal(pDict);
m_GenNum = kMemoryBasedGenNum;
m_pDataBuf = FX_Alloc(uint8_t, size);
if (pData)
FXSYS_memcpy(m_pDataBuf, pData, size);
m_dwSize = size;
if (m_pDict)
m_pDict->SetAtInteger("Length", size);
}
CPDF_Object* CPDF_Stream::Clone(FX_BOOL bDirect) const {
CPDF_StreamAcc acc;
acc.LoadAllData(this, TRUE);
FX_DWORD streamSize = acc.GetSize();
CPDF_Dictionary* pDict = GetDict();
if (pDict)
pDict = ToDictionary(pDict->Clone(bDirect));
return new CPDF_Stream(acc.DetachData(), streamSize, pDict);
}
void CPDF_Stream::SetData(const uint8_t* pData,
FX_DWORD size,
FX_BOOL bCompressed,
FX_BOOL bKeepBuf) {
if (IsMemoryBased())
FX_Free(m_pDataBuf);
m_GenNum = kMemoryBasedGenNum;
if (bKeepBuf) {
m_pDataBuf = const_cast<uint8_t*>(pData);
} else {
m_pDataBuf = FX_Alloc(uint8_t, size);
if (pData) {
FXSYS_memcpy(m_pDataBuf, pData, size);
}
}
m_dwSize = size;
if (!m_pDict)
m_pDict = new CPDF_Dictionary;
m_pDict->SetAtInteger("Length", size);
if (!bCompressed) {
m_pDict->RemoveAt("Filter");
m_pDict->RemoveAt("DecodeParms");
}
}
FX_BOOL CPDF_Stream::ReadRawData(FX_FILESIZE offset,
uint8_t* buf,
FX_DWORD size) const {
if (!IsMemoryBased() && m_pFile)
return m_pFile->ReadBlock(buf, offset, size);
if (m_pDataBuf)
FXSYS_memcpy(buf, m_pDataBuf + offset, size);
return TRUE;
}
void CPDF_Stream::InitStreamFromFile(IFX_FileRead* pFile,
CPDF_Dictionary* pDict) {
InitStreamInternal(pDict);
m_pFile = pFile;
m_dwSize = (FX_DWORD)pFile->GetSize();
if (m_pDict)
m_pDict->SetAtInteger("Length", m_dwSize);
}
CFX_WideString CPDF_Stream::GetUnicodeText() const {
CPDF_StreamAcc stream;
stream.LoadAllData(this, FALSE);
return PDF_DecodeText(stream.GetData(), stream.GetSize());
}
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;
}
|
