FX_BOOL CCodec_Jbig2Module::Decode(IFX_FileRead* file_ptr, FX_DWORD& width, FX_DWORD& height, FX_DWORD& pitch, uint8_t*& dest_buf) { CJBig2_Context* pContext = NULL; CJBig2_Image* dest_image = NULL; FX_DWORD src_size = (FX_DWORD)file_ptr->GetSize(); uint8_t* src_buf = FX_Alloc(uint8_t, src_size); int ret = 0; if(!file_ptr->ReadBlock(src_buf, 0, src_size)) { goto failed; } pContext = CJBig2_Context::CreateContext(&m_Module, NULL, 0, src_buf, src_size, JBIG2_FILE_STREAM, &m_SymbolDictCache); if(pContext == NULL) { goto failed; } ret = pContext->getFirstPage(&dest_image, NULL); CJBig2_Context::DestroyContext(pContext); if (ret != JBIG2_SUCCESS) { goto failed; } width = (FX_DWORD)dest_image->m_nWidth; height = (FX_DWORD)dest_image->m_nHeight; pitch = (FX_DWORD)dest_image->m_nStride; dest_buf = dest_image->m_pData; dest_image->m_bNeedFree = FALSE; delete dest_image; FX_Free(src_buf); return TRUE; failed: if(src_buf) { FX_Free(src_buf); } return FALSE; }
FX_BOOL CCodec_Jbig2Module::Decode(FX_DWORD width, FX_DWORD height, FX_LPCBYTE src_buf, FX_DWORD src_size, FX_LPCBYTE global_data, FX_DWORD global_size, FX_LPBYTE dest_buf, FX_DWORD dest_pitch) { FXSYS_memset32(dest_buf, 0, height * dest_pitch); CJBig2_Context* pContext = CJBig2_Context::CreateContext(&m_Module, (FX_LPBYTE)global_data, global_size, (FX_LPBYTE)src_buf, src_size, JBIG2_EMBED_STREAM, &m_SymbolDictCache); if (pContext == NULL) { return FALSE; } int ret = pContext->getFirstPage(dest_buf, width, height, dest_pitch, NULL); CJBig2_Context::DestroyContext(pContext); if (ret != JBIG2_SUCCESS) { return FALSE; } int dword_size = height * dest_pitch / 4; FX_DWORD* dword_buf = (FX_DWORD*)dest_buf; for (int i = 0; i < dword_size; i ++) { dword_buf[i] = ~dword_buf[i]; } return TRUE; }