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 } 210 211 212 213
