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
|
// Copyright 2014 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 <list>
#include "core/fxcodec/codec/codec_int.h"
#include "core/fxcodec/include/fx_codec.h"
namespace {
class CCodec_Jbig2Context {
public:
CCodec_Jbig2Context();
~CCodec_Jbig2Context() {}
uint32_t m_width;
uint32_t m_height;
CPDF_StreamAcc* m_pGlobalStream;
CPDF_StreamAcc* m_pSrcStream;
uint8_t* m_dest_buf;
uint32_t m_dest_pitch;
IFX_Pause* m_pPause;
CJBig2_Context* m_pContext;
CJBig2_Image* m_dest_image;
};
} // namespace
// Holds per-document JBig2 related data.
class JBig2DocumentContext : public CFX_Deletable {
public:
std::list<CJBig2_CachePair>* GetSymbolDictCache() {
return &m_SymbolDictCache;
}
~JBig2DocumentContext() override {
for (auto it : m_SymbolDictCache) {
delete it.second;
}
}
private:
std::list<CJBig2_CachePair> m_SymbolDictCache;
};
JBig2DocumentContext* GetJBig2DocumentContext(
std::unique_ptr<CFX_Deletable>* pContextHolder) {
if (!pContextHolder->get())
pContextHolder->reset(new JBig2DocumentContext());
return static_cast<JBig2DocumentContext*>(pContextHolder->get());
}
CCodec_Jbig2Context::CCodec_Jbig2Context() {
FXSYS_memset(this, 0, sizeof(CCodec_Jbig2Context));
}
CCodec_Jbig2Module::~CCodec_Jbig2Module() {}
void* CCodec_Jbig2Module::CreateJbig2Context() {
return new CCodec_Jbig2Context();
}
void CCodec_Jbig2Module::DestroyJbig2Context(void* pJbig2Content) {
if (pJbig2Content) {
CJBig2_Context::DestroyContext(
((CCodec_Jbig2Context*)pJbig2Content)->m_pContext);
delete (CCodec_Jbig2Context*)pJbig2Content;
}
pJbig2Content = nullptr;
}
FXCODEC_STATUS CCodec_Jbig2Module::StartDecode(
void* pJbig2Context,
std::unique_ptr<CFX_Deletable>* pContextHolder,
uint32_t width,
uint32_t height,
CPDF_StreamAcc* src_stream,
CPDF_StreamAcc* global_stream,
uint8_t* dest_buf,
uint32_t dest_pitch,
IFX_Pause* pPause) {
if (!pJbig2Context) {
return FXCODEC_STATUS_ERR_PARAMS;
}
JBig2DocumentContext* pJBig2DocumentContext =
GetJBig2DocumentContext(pContextHolder);
CCodec_Jbig2Context* m_pJbig2Context = (CCodec_Jbig2Context*)pJbig2Context;
m_pJbig2Context->m_width = width;
m_pJbig2Context->m_height = height;
m_pJbig2Context->m_pSrcStream = src_stream;
m_pJbig2Context->m_pGlobalStream = global_stream;
m_pJbig2Context->m_dest_buf = dest_buf;
m_pJbig2Context->m_dest_pitch = dest_pitch;
m_pJbig2Context->m_pPause = pPause;
FXSYS_memset(dest_buf, 0, height * dest_pitch);
m_pJbig2Context->m_pContext = CJBig2_Context::CreateContext(
global_stream, src_stream, pJBig2DocumentContext->GetSymbolDictCache(),
pPause);
if (!m_pJbig2Context->m_pContext) {
return FXCODEC_STATUS_ERROR;
}
int ret = m_pJbig2Context->m_pContext->getFirstPage(dest_buf, width, height,
dest_pitch, pPause);
if (m_pJbig2Context->m_pContext->GetProcessingStatus() ==
FXCODEC_STATUS_DECODE_FINISH) {
CJBig2_Context::DestroyContext(m_pJbig2Context->m_pContext);
m_pJbig2Context->m_pContext = nullptr;
if (ret != JBIG2_SUCCESS) {
return FXCODEC_STATUS_ERROR;
}
int dword_size = height * dest_pitch / 4;
uint32_t* dword_buf = (uint32_t*)dest_buf;
for (int i = 0; i < dword_size; i++) {
dword_buf[i] = ~dword_buf[i];
}
return FXCODEC_STATUS_DECODE_FINISH;
}
return m_pJbig2Context->m_pContext->GetProcessingStatus();
}
FXCODEC_STATUS CCodec_Jbig2Module::ContinueDecode(void* pJbig2Context,
IFX_Pause* pPause) {
CCodec_Jbig2Context* m_pJbig2Context = (CCodec_Jbig2Context*)pJbig2Context;
int ret = m_pJbig2Context->m_pContext->Continue(pPause);
if (m_pJbig2Context->m_pContext->GetProcessingStatus() !=
FXCODEC_STATUS_DECODE_FINISH) {
return m_pJbig2Context->m_pContext->GetProcessingStatus();
}
CJBig2_Context::DestroyContext(m_pJbig2Context->m_pContext);
m_pJbig2Context->m_pContext = nullptr;
if (ret != JBIG2_SUCCESS) {
return FXCODEC_STATUS_ERROR;
}
int dword_size =
m_pJbig2Context->m_height * m_pJbig2Context->m_dest_pitch / 4;
uint32_t* dword_buf = (uint32_t*)m_pJbig2Context->m_dest_buf;
for (int i = 0; i < dword_size; i++) {
dword_buf[i] = ~dword_buf[i];
}
return FXCODEC_STATUS_DECODE_FINISH;
}
|
