L_OcrDocumentManager_AppendDocuments

#define MAKE_IMAGE_PATH(pFileName) TEXT("C:\\Users\\Public\\Documents\\LEADTOOLS Images\\")pFileName 
#define OCR_ADVANTAGE_RUNTIME_DIR TEXT("C:\\LEADTOOLS 19\\Bin\\Common\\OcrAdvantageRuntime") 
L_INT L_OcrDocumentManager_AppendDocumentsExample() 
{ 
   BITMAPHANDLE bitmap1 = { 0 }; 
   BITMAPHANDLE bitmap2 = { 0 }; 
   L_OcrEngine ocrEngine = NULL; 
   L_OcrPage ocrPage1 = NULL; 
   L_OcrPage ocrPage2 = NULL; 
   L_OcrDocumentManager ocrDocumentManager = NULL; 
   L_OcrDocument ocrDocument1 = NULL; 
   L_OcrDocument ocrDocument2 = NULL; 
   // Create an instance of the engine 
   L_INT retCode = L_OcrEngineManager_CreateEngine(L_OcrEngineType_Advantage, &ocrEngine); 
   if(retCode == SUCCESS) 
   { 
      // Start the engine using default parameters 
      retCode = L_OcrEngine_Startup(ocrEngine, NULL, OCR_ADVANTAGE_RUNTIME_DIR); 
      if(retCode != SUCCESS) 
         return retCode; 
      // Load first image 
      retCode = L_LoadBitmap(MAKE_IMAGE_PATH(L_TEXT("Ocr1.tif")), &bitmap1, sizeof(BITMAPHANDLE), 0, ORDER_RGB, NULL, NULL); 
      if(retCode != SUCCESS) 
         goto CLEANUP; 
      // Add an image to OCR page. Transfer ownership of the bitmap to the page 
      retCode = L_OcrPage_FromBitmap(ocrEngine, &ocrPage1, &bitmap1, L_OcrBitmapSharingMode_AutoFree, NULL, NULL); 
      if(retCode != SUCCESS) 
         goto CLEANUP; 
      // We have a valid page and bitmap ownership has transfered. So, we do not need to free the bitmap anymore. 
      // Bitmap will be freed when ocrPage1 is destroyed. 
      bitmap1.Flags.Allocated = 0; 
      // Recognize the page 
      // Note: Recognize can be called without calling AutoZone or manually adding zones. 
      // The engine will check and automatically auto-zones the page. 
      retCode = L_OcrPage_Recognize(ocrPage1, NULL, NULL); 
      if(retCode != SUCCESS) 
         goto CLEANUP; 
      // Load second image 
      retCode = L_LoadBitmap(MAKE_IMAGE_PATH(L_TEXT("Ocr2.tif")), &bitmap2, sizeof(BITMAPHANDLE), 0, ORDER_RGB, NULL, NULL); 
      if(retCode != SUCCESS) 
         goto CLEANUP; 
      // Add an image to OCR page. Transfer ownership of the bitmap to the page 
      retCode = L_OcrPage_FromBitmap(ocrEngine, &ocrPage2, &bitmap2, L_OcrBitmapSharingMode_AutoFree, NULL, NULL); 
      if(retCode != SUCCESS) 
         goto CLEANUP; 
      // We have a valid page and bitmap ownership has transfered. So, we do not need to free the bitmap anymore. 
      // Bitmap will be freed when ocrPage1 is destroyed. 
      bitmap2.Flags.Allocated = 0; 
      // Recognize the page 
      // Note: Recognize can be called without calling AutoZone or manually adding zones. 
      // The engine will check and automatically auto-zones the page. 
      retCode = L_OcrPage_Recognize(ocrPage2, NULL, NULL); 
      if(retCode != SUCCESS) 
         goto CLEANUP; 
      //Get the document manager 
      retCode = L_OcrEngine_GetDocumentManager(ocrEngine, &ocrDocumentManager); 
      if(retCode != SUCCESS) 
         goto CLEANUP; 
      retCode = L_OcrDocumentManager_CreateDocument(ocrDocumentManager, &ocrDocument1, L_OcrCreateDocumentOptions_AutoDeleteFile, NULL); 
      if(retCode != SUCCESS) 
         goto CLEANUP; 
      retCode = L_OcrDocumentManager_CreateDocument(ocrDocumentManager, &ocrDocument2, L_OcrCreateDocumentOptions_AutoDeleteFile, NULL); 
      if(retCode != SUCCESS) 
         goto CLEANUP; 
      // Adding pages to OCR documents. Note: When using the OcrDocument in file mode, 
      // adding the page to the document must come after recognition. If the OcrPage, 
      // is added before it is recognized, no recognition data will be associated with 
      // the OcrPage in the OcrDocument. 
      // Add ocrPage1 to the ocrDocument1. 
      retCode = L_OcrDocument_AddPage(ocrDocument1, ocrPage1); 
      if(retCode != SUCCESS) 
         goto CLEANUP; 
      // Add ocrPage2 to the ocrDocument2. 
      retCode = L_OcrDocument_AddPage(ocrDocument2, ocrPage2); 
      if(retCode != SUCCESS) 
         goto CLEANUP; 
      // Now append ocrDocument1 to ocrDocument2, in this case ocrDocument2 is the one that contains both documents (both pages) 
      retCode = L_OcrDocumentManager_AppendDocuments(ocrDocument1, ocrDocument2); 
      if(retCode != SUCCESS) 
         goto CLEANUP; 
      // Adding the page to a file based document will take a snap shot of the recognition data and store it in the document. At this 
      // point, the page is no longer needed. So destroy it to free up memory not used anymore 
      L_OcrPage_Destroy(ocrPage1); 
      L_OcrPage_Destroy(ocrPage2); 
      // Set the handle to NULL so we do not free it in our clean-up code 
      ocrPage1 = NULL; 
      ocrPage2 = NULL; 
      // Save the accumulative document (ocrDocument2) to PDF 
      retCode = L_OcrDocument_Save(ocrDocument2, MAKE_IMAGE_PATH(L_TEXT("final.pdf")), DOCUMENTFORMAT_PDF, NULL, NULL); 
   } 
CLEANUP: 
   if(bitmap1.Flags.Allocated) 
      L_FreeBitmap(&bitmap1); 
   if(bitmap2.Flags.Allocated) 
      L_FreeBitmap(&bitmap2); 
   if(ocrPage1 != NULL) 
      L_OcrPage_Destroy(ocrPage1); 
   if(ocrPage2 != NULL) 
      L_OcrPage_Destroy(ocrPage2); 
   if(ocrDocument1 != NULL) 
      L_OcrDocument_Destroy(ocrDocument1); 
   if(ocrDocument2 != NULL) 
      L_OcrDocument_Destroy(ocrDocument2); 
   if(ocrEngine != NULL) 
      L_OcrEngine_Destroy(ocrEngine); 
   return retCode; 
}