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 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, &m_SymbolDictCache); 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 int ret = 0; 57 if(!file_ptr->ReadBlock(src_buf, 0, src_size)) { 58 goto failed; 59 } 60 pContext = CJBig2_Context::CreateContext(&m_Module, NULL, 0, src_buf, src_size, JBIG2_FILE_STREAM, &m_SymbolDictCache); 61 if(pContext == NULL) { 62 goto failed; 63 } 64 ret = pContext->getFirstPage(&dest_image, NULL); 65 CJBig2_Context::DestroyContext(pContext); 66 if (ret != JBIG2_SUCCESS) { 67 goto failed; 68 } 69 width = (FX_DWORD)dest_image->m_nWidth; 70 height = (FX_DWORD)dest_image->m_nHeight; 71 pitch = (FX_DWORD)dest_image->m_nStride; 72 dest_buf = dest_image->m_pData; 73 dest_image->m_bNeedFree = FALSE; 74 delete dest_image; 75 FX_Free(src_buf); 76 return TRUE; 77 failed: 78 if(src_buf) { 79 FX_Free(src_buf); 80 } 81 return FALSE; 82 } 83 FXCODEC_STATUS CCodec_Jbig2Module::StartDecode(void* pJbig2Context, FX_DWORD width, FX_DWORD height, FX_LPCBYTE src_buf, FX_DWORD src_size, 84 FX_LPCBYTE global_data, FX_DWORD global_size, FX_LPBYTE dest_buf, FX_DWORD dest_pitch, IFX_Pause* pPause) 85 { 86 if(!pJbig2Context) { 87 return FXCODEC_STATUS_ERR_PARAMS; 88 } 89 CCodec_Jbig2Context* m_pJbig2Context = (CCodec_Jbig2Context*)pJbig2Context; 90 m_pJbig2Context->m_width = width; 91 m_pJbig2Context->m_height = height; 92 m_pJbig2Context->m_src_buf = (unsigned char *)src_buf; 93 m_pJbig2Context->m_src_size = src_size; 94 m_pJbig2Context->m_global_data = global_data; 95 m_pJbig2Context->m_global_size = global_size; 96 m_pJbig2Context->m_dest_buf = dest_buf; 97 m_pJbig2Context->m_dest_pitch = dest_pitch; 98 m_pJbig2Context->m_pPause = pPause; 99 m_pJbig2Context->m_bFileReader = FALSE; 100 FXSYS_memset32(dest_buf, 0, height * dest_pitch); 101 m_pJbig2Context->m_pContext = CJBig2_Context::CreateContext(&m_Module, 102 (FX_LPBYTE)global_data, global_size, (FX_LPBYTE)src_buf, src_size, JBIG2_EMBED_STREAM, &m_SymbolDictCache, pPause); 103 if(!m_pJbig2Context->m_pContext) { 104 return FXCODEC_STATUS_ERROR; 105 } 106 int ret = m_pJbig2Context->m_pContext->getFirstPage(dest_buf, width, height, dest_pitch, pPause); 107 if(m_pJbig2Context->m_pContext->GetProcessiveStatus() == FXCODEC_STATUS_DECODE_FINISH) { 108 CJBig2_Context::DestroyContext(m_pJbig2Context->m_pContext); 109 m_pJbig2Context->m_pContext = NULL; 110 if (ret != JBIG2_SUCCESS) { 111 return FXCODEC_STATUS_ERROR; 112 } 113 int dword_size = height * dest_pitch / 4; 114 FX_DWORD* dword_buf = (FX_DWORD*)dest_buf; 115 for (int i = 0; i < dword_size; i ++) { 116 dword_buf[i] = ~dword_buf[i]; 117 } 118 return FXCODEC_STATUS_DECODE_FINISH; 119 } 120 return m_pJbig2Context->m_pContext->GetProcessiveStatus(); 121 } 122 FXCODEC_STATUS CCodec_Jbig2Module::StartDecode(void* pJbig2Context, IFX_FileRead* file_ptr, 123 FX_DWORD& width, FX_DWORD& height, FX_DWORD& pitch, FX_LPBYTE& dest_buf, IFX_Pause* pPause) 124 { 125 if(!pJbig2Context) { 126 return FXCODEC_STATUS_ERR_PARAMS; 127 } 128 CCodec_Jbig2Context* m_pJbig2Context = (CCodec_Jbig2Context*)pJbig2Context; 129 m_pJbig2Context->m_bFileReader = TRUE; 130 m_pJbig2Context->m_dest_image = NULL; 131 m_pJbig2Context->m_src_size = (FX_DWORD)file_ptr->GetSize(); 132 m_pJbig2Context->m_src_buf = FX_Alloc(FX_BYTE, m_pJbig2Context->m_src_size); 133 int ret = 0; 134 if(!file_ptr->ReadBlock((void*)m_pJbig2Context->m_src_buf, 0, m_pJbig2Context->m_src_size)) { 135 goto failed; 136 } 137 m_pJbig2Context->m_pContext = CJBig2_Context::CreateContext(&m_Module, NULL, 0, m_pJbig2Context->m_src_buf, m_pJbig2Context->m_src_size, JBIG2_FILE_STREAM, &m_SymbolDictCache, pPause); 138 if(m_pJbig2Context->m_pContext == NULL) { 139 goto failed; 140 } 141 ret = m_pJbig2Context->m_pContext->getFirstPage(&m_pJbig2Context->m_dest_image, pPause); 142 if(m_pJbig2Context->m_pContext->GetProcessiveStatus() == FXCODEC_STATUS_DECODE_TOBECONTINUE) { 143 width = (FX_DWORD)m_pJbig2Context->m_dest_image->m_nWidth; 144 height = (FX_DWORD)m_pJbig2Context->m_dest_image->m_nHeight; 145 pitch = (FX_DWORD)m_pJbig2Context->m_dest_image->m_nStride; 146 dest_buf = m_pJbig2Context->m_dest_image->m_pData; 147 m_pJbig2Context->m_dest_image->m_bNeedFree = FALSE; 148 return FXCODEC_STATUS_DECODE_TOBECONTINUE; 149 } 150 CJBig2_Context::DestroyContext(m_pJbig2Context->m_pContext); 151 m_pJbig2Context->m_pContext = NULL; 152 if (ret != JBIG2_SUCCESS) { 153 goto failed; 154 } 155 width = (FX_DWORD)m_pJbig2Context->m_dest_image->m_nWidth; 156 height = (FX_DWORD)m_pJbig2Context->m_dest_image->m_nHeight; 157 pitch = (FX_DWORD)m_pJbig2Context->m_dest_image->m_nStride; 158 dest_buf = m_pJbig2Context->m_dest_image->m_pData; 159 m_pJbig2Context->m_dest_image->m_bNeedFree = FALSE; 160 delete m_pJbig2Context->m_dest_image; 161 FX_Free(m_pJbig2Context->m_src_buf); 162 return FXCODEC_STATUS_DECODE_FINISH; 163 failed: 164 if(m_pJbig2Context->m_src_buf) { 165 FX_Free(m_pJbig2Context->m_src_buf); 166 } 167 m_pJbig2Context->m_src_buf = NULL; 168 return FXCODEC_STATUS_ERROR; 169 } 170 FXCODEC_STATUS CCodec_Jbig2Module::ContinueDecode(void* pJbig2Context, IFX_Pause* pPause) 171 { 172 CCodec_Jbig2Context* m_pJbig2Context = (CCodec_Jbig2Context*)pJbig2Context; 173 int ret = m_pJbig2Context->m_pContext->Continue(pPause); 174 if(m_pJbig2Context->m_pContext->GetProcessiveStatus() == FXCODEC_STATUS_DECODE_FINISH) { 175 if(m_pJbig2Context->m_bFileReader) { 176 CJBig2_Context::DestroyContext(m_pJbig2Context->m_pContext); 177 m_pJbig2Context->m_pContext = NULL; 178 if (ret != JBIG2_SUCCESS) { 179 if(m_pJbig2Context->m_src_buf) { 180 FX_Free(m_pJbig2Context->m_src_buf); 181 } 182 m_pJbig2Context->m_src_buf = NULL; 183 return FXCODEC_STATUS_ERROR; 184 } 185 delete m_pJbig2Context->m_dest_image; 186 FX_Free(m_pJbig2Context->m_src_buf); 187 return FXCODEC_STATUS_DECODE_FINISH; 188 } else { 189 CJBig2_Context::DestroyContext(m_pJbig2Context->m_pContext); 190 m_pJbig2Context->m_pContext = NULL; 191 if (ret != JBIG2_SUCCESS) { 192 return FXCODEC_STATUS_ERROR; 193 } 194 int dword_size = m_pJbig2Context->m_height * m_pJbig2Context->m_dest_pitch / 4; 195 FX_DWORD* dword_buf = (FX_DWORD*)m_pJbig2Context->m_dest_buf; 196 for (int i = 0; i < dword_size; i ++) { 197 dword_buf[i] = ~dword_buf[i]; 198 } 199 return FXCODEC_STATUS_DECODE_FINISH; 200 } 201 } 202 return m_pJbig2Context->m_pContext->GetProcessiveStatus(); 203 } 204 205 206 207
