Remove a few unused variables, functions, and member variables.
[pdfium.git] / core / src / fxcodec / codec / fx_codec_jbig.cpp
1 // Copyright 2014 PDFium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4  
5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
6
7 #include "../../../include/fxcodec/fx_codec.h"
8 #include "codec_int.h"
9 CCodec_Jbig2Context::CCodec_Jbig2Context()
10 {
11     FXSYS_memset32(this, 0, sizeof(CCodec_Jbig2Context));
12 }
13 CCodec_Jbig2Module::~CCodec_Jbig2Module()
14 {
15 }
16 void* CCodec_Jbig2Module::CreateJbig2Context()
17 {
18     return FX_NEW CCodec_Jbig2Context();
19 }
20 void CCodec_Jbig2Module::DestroyJbig2Context(void* pJbig2Content)
21 {
22     if(pJbig2Content) {
23         CJBig2_Context::DestroyContext(((CCodec_Jbig2Context*)pJbig2Content)->m_pContext);
24         delete (CCodec_Jbig2Context*)pJbig2Content;
25     }
26     pJbig2Content = NULL;
27 }
28 FX_BOOL CCodec_Jbig2Module::Decode(FX_DWORD width, FX_DWORD height, FX_LPCBYTE src_buf, FX_DWORD src_size,
29                                    FX_LPCBYTE global_data, FX_DWORD global_size, FX_LPBYTE dest_buf, FX_DWORD dest_pitch)
30 {
31     FXSYS_memset32(dest_buf, 0, height * dest_pitch);
32     CJBig2_Context* pContext = CJBig2_Context::CreateContext(&m_Module,
33                                (FX_LPBYTE)global_data, global_size, (FX_LPBYTE)src_buf, src_size, JBIG2_EMBED_STREAM);
34     if (pContext == NULL) {
35         return FALSE;
36     }
37     int ret = pContext->getFirstPage(dest_buf, width, height, dest_pitch, NULL);
38     CJBig2_Context::DestroyContext(pContext);
39     if (ret != JBIG2_SUCCESS) {
40         return FALSE;
41     }
42     int dword_size = height * dest_pitch / 4;
43     FX_DWORD* dword_buf = (FX_DWORD*)dest_buf;
44     for (int i = 0; i < dword_size; i ++) {
45         dword_buf[i] = ~dword_buf[i];
46     }
47     return TRUE;
48 }
49 FX_BOOL CCodec_Jbig2Module::Decode(IFX_FileRead* file_ptr,
50                                    FX_DWORD& width, FX_DWORD& height, FX_DWORD& pitch, FX_LPBYTE& dest_buf)
51 {
52     CJBig2_Context* pContext = NULL;
53     CJBig2_Image* dest_image = NULL;
54     FX_DWORD src_size = (FX_DWORD)file_ptr->GetSize();
55     FX_LPBYTE src_buf = FX_Alloc(FX_BYTE, src_size);
56     if (src_buf == NULL) {
57         return FALSE;
58     }
59     int ret = 0;
60     if(!file_ptr->ReadBlock(src_buf, 0, src_size)) {
61         goto failed;
62     }
63     pContext = CJBig2_Context::CreateContext(&m_Module, NULL, 0, src_buf, src_size, JBIG2_FILE_STREAM);
64     if(pContext == NULL) {
65         goto failed;
66     }
67     ret = pContext->getFirstPage(&dest_image, NULL);
68     CJBig2_Context::DestroyContext(pContext);
69     if (ret != JBIG2_SUCCESS) {
70         goto failed;
71     }
72     width = (FX_DWORD)dest_image->m_nWidth;
73     height = (FX_DWORD)dest_image->m_nHeight;
74     pitch = (FX_DWORD)dest_image->m_nStride;
75     dest_buf = dest_image->m_pData;
76     dest_image->m_bNeedFree = FALSE;
77     delete dest_image;
78     FX_Free(src_buf);
79     return TRUE;
80 failed:
81     if(src_buf) {
82         FX_Free(src_buf);
83     }
84     return FALSE;
85 }
86 FXCODEC_STATUS CCodec_Jbig2Module::StartDecode(void* pJbig2Context, FX_DWORD width, FX_DWORD height, FX_LPCBYTE src_buf, FX_DWORD src_size,
87         FX_LPCBYTE global_data, FX_DWORD global_size, FX_LPBYTE dest_buf, FX_DWORD dest_pitch, IFX_Pause* pPause)
88 {
89     if(!pJbig2Context) {
90         return FXCODEC_STATUS_ERR_PARAMS;
91     }
92     CCodec_Jbig2Context* m_pJbig2Context = (CCodec_Jbig2Context*)pJbig2Context;
93     m_pJbig2Context->m_width = width;
94     m_pJbig2Context->m_height = height;
95     m_pJbig2Context->m_src_buf = (unsigned char *)src_buf;
96     m_pJbig2Context->m_src_size = src_size;
97     m_pJbig2Context->m_global_data = global_data;
98     m_pJbig2Context->m_global_size = global_size;
99     m_pJbig2Context->m_dest_buf = dest_buf;
100     m_pJbig2Context->m_dest_pitch = dest_pitch;
101     m_pJbig2Context->m_pPause = pPause;
102     m_pJbig2Context->m_bFileReader = FALSE;
103     FXSYS_memset32(dest_buf, 0, height * dest_pitch);
104     m_pJbig2Context->m_pContext = CJBig2_Context::CreateContext(&m_Module,
105                                   (FX_LPBYTE)global_data, global_size, (FX_LPBYTE)src_buf, src_size, JBIG2_EMBED_STREAM, pPause);
106     if(!m_pJbig2Context->m_pContext) {
107         return FXCODEC_STATUS_ERROR;
108     }
109     int ret = m_pJbig2Context->m_pContext->getFirstPage(dest_buf, width, height, dest_pitch, pPause);
110     if(m_pJbig2Context->m_pContext->GetProcessiveStatus() == FXCODEC_STATUS_DECODE_FINISH) {
111         CJBig2_Context::DestroyContext(m_pJbig2Context->m_pContext);
112         m_pJbig2Context->m_pContext = NULL;
113         if (ret != JBIG2_SUCCESS) {
114             return FXCODEC_STATUS_ERROR;
115         }
116         int dword_size = height * dest_pitch / 4;
117         FX_DWORD* dword_buf = (FX_DWORD*)dest_buf;
118         for (int i = 0; i < dword_size; i ++) {
119             dword_buf[i] = ~dword_buf[i];
120         }
121         return FXCODEC_STATUS_DECODE_FINISH;
122     }
123     return m_pJbig2Context->m_pContext->GetProcessiveStatus();
124 }
125 FXCODEC_STATUS CCodec_Jbig2Module::StartDecode(void* pJbig2Context, IFX_FileRead* file_ptr,
126         FX_DWORD& width, FX_DWORD& height, FX_DWORD& pitch, FX_LPBYTE& dest_buf, IFX_Pause* pPause)
127 {
128     if(!pJbig2Context) {
129         return FXCODEC_STATUS_ERR_PARAMS;
130     }
131     CCodec_Jbig2Context* m_pJbig2Context = (CCodec_Jbig2Context*)pJbig2Context;
132     m_pJbig2Context->m_bFileReader = TRUE;
133     m_pJbig2Context->m_dest_image = NULL;
134     m_pJbig2Context->m_src_size = (FX_DWORD)file_ptr->GetSize();
135     m_pJbig2Context->m_src_buf = FX_Alloc(FX_BYTE, m_pJbig2Context->m_src_size);
136     if (m_pJbig2Context->m_src_buf == NULL) {
137         return FXCODEC_STATUS_ERR_MEMORY;
138     }
139     int ret = 0;
140     if(!file_ptr->ReadBlock((void*)m_pJbig2Context->m_src_buf, 0, m_pJbig2Context->m_src_size)) {
141         goto failed;
142     }
143     m_pJbig2Context->m_pContext = CJBig2_Context::CreateContext(&m_Module, NULL, 0, m_pJbig2Context->m_src_buf, m_pJbig2Context->m_src_size, JBIG2_FILE_STREAM, pPause);
144     if(m_pJbig2Context->m_pContext == NULL) {
145         goto failed;
146     }
147     ret = m_pJbig2Context->m_pContext->getFirstPage(&m_pJbig2Context->m_dest_image, pPause);
148     if(m_pJbig2Context->m_pContext->GetProcessiveStatus() == FXCODEC_STATUS_DECODE_TOBECONTINUE) {
149         width = (FX_DWORD)m_pJbig2Context->m_dest_image->m_nWidth;
150         height = (FX_DWORD)m_pJbig2Context->m_dest_image->m_nHeight;
151         pitch = (FX_DWORD)m_pJbig2Context->m_dest_image->m_nStride;
152         dest_buf = m_pJbig2Context->m_dest_image->m_pData;
153         m_pJbig2Context->m_dest_image->m_bNeedFree = FALSE;
154         return FXCODEC_STATUS_DECODE_TOBECONTINUE;
155     }
156     CJBig2_Context::DestroyContext(m_pJbig2Context->m_pContext);
157     m_pJbig2Context->m_pContext = NULL;
158     if (ret != JBIG2_SUCCESS) {
159         goto failed;
160     }
161     width = (FX_DWORD)m_pJbig2Context->m_dest_image->m_nWidth;
162     height = (FX_DWORD)m_pJbig2Context->m_dest_image->m_nHeight;
163     pitch = (FX_DWORD)m_pJbig2Context->m_dest_image->m_nStride;
164     dest_buf = m_pJbig2Context->m_dest_image->m_pData;
165     m_pJbig2Context->m_dest_image->m_bNeedFree = FALSE;
166     delete m_pJbig2Context->m_dest_image;
167     FX_Free(m_pJbig2Context->m_src_buf);
168     return FXCODEC_STATUS_DECODE_FINISH;
169 failed:
170     if(m_pJbig2Context->m_src_buf) {
171         FX_Free(m_pJbig2Context->m_src_buf);
172     }
173     m_pJbig2Context->m_src_buf = NULL;
174     return FXCODEC_STATUS_ERROR;
175 }
176 FXCODEC_STATUS CCodec_Jbig2Module::ContinueDecode(void* pJbig2Context, IFX_Pause* pPause)
177 {
178     CCodec_Jbig2Context* m_pJbig2Context = (CCodec_Jbig2Context*)pJbig2Context;
179     int ret = m_pJbig2Context->m_pContext->Continue(pPause);
180     if(m_pJbig2Context->m_pContext->GetProcessiveStatus() == FXCODEC_STATUS_DECODE_FINISH) {
181         if(m_pJbig2Context->m_bFileReader) {
182             CJBig2_Context::DestroyContext(m_pJbig2Context->m_pContext);
183             m_pJbig2Context->m_pContext = NULL;
184             if (ret != JBIG2_SUCCESS) {
185                 if(m_pJbig2Context->m_src_buf) {
186                     FX_Free(m_pJbig2Context->m_src_buf);
187                 }
188                 m_pJbig2Context->m_src_buf = NULL;
189                 return FXCODEC_STATUS_ERROR;
190             }
191             delete m_pJbig2Context->m_dest_image;
192             FX_Free(m_pJbig2Context->m_src_buf);
193             return FXCODEC_STATUS_DECODE_FINISH;
194         } else {
195             CJBig2_Context::DestroyContext(m_pJbig2Context->m_pContext);
196             m_pJbig2Context->m_pContext = NULL;
197             if (ret != JBIG2_SUCCESS) {
198                 return FXCODEC_STATUS_ERROR;
199             }
200             int dword_size = m_pJbig2Context->m_height * m_pJbig2Context->m_dest_pitch / 4;
201             FX_DWORD* dword_buf = (FX_DWORD*)m_pJbig2Context->m_dest_buf;
202             for (int i = 0; i < dword_size; i ++) {
203                 dword_buf[i] = ~dword_buf[i];
204             }
205             return FXCODEC_STATUS_DECODE_FINISH;
206         }
207     }
208     return m_pJbig2Context->m_pContext->GetProcessiveStatus();
209 }
210
211
212