Help Version 19.0.2017.10.27
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To create and run a program that demonstrates how to add pages to an OCR document using Ltdoc2.h. This program will allow page insertion and to save the inserted page:
1. |
Create a new directory in the \Examples\CDLL directory called OCR_Ltdoc2 |
2. |
Copy everything in the SimpleLoad directory (copy only folders content) into the OCR_Ltdoc2 directory. |
3. |
Compile the project as it is and run SimpleLoad.exe to familiarize yourself with the basic program. |
4. |
In the Imports.cpp, add the following lines: |
#if defined(WIN64)#pragma comment(lib, "..\\..\\..\\Lib"L_VER_DESIGNATOR"\\CDLL\\x64\\Ltdoc2_x.lib")#else#pragma comment(lib, "..\\..\\..\\Lib"L_VER_DESIGNATOR"\\CDLL\\Win32\\Ltdoc2_u.lib")#endif // #if defined(WIN64)/* L_VER_DESIGNATOR is a macro that defines the version. For example for version 16 uses LTVXX_CONFIG. To set it in Visual Studio 2005, go to the main menu. Add in Project->Property->Configuration Properties->C/C++->Preprocessor: WIN32;_DEBUG;LTVXX_CONFIG */
5. |
Add the following line in StdAfx.h in the OCR_Ltdoc2 directory: |
/* LEADTOOLS main OCR document header file */#include "..\..\..\include\ltdoc2.h"#include "..\..\..\include\ltdlg.h"
6. |
Define the following global variables in Ezfunc.h in the OCR_Ltdoc2 directory: |
L_HDOC2 hDoc; /* OCR Document handle */PAGEINFO2 PageInfo;DOC2_LANGIDS LangId[1];L_BOOL bPageAdded;L_INT nSId;#define IDM_INSERT_PAGE 200#define IDM_SAVE_ADDED_PAGE 300
| 7. | Add the following statements in Ezfunc.cpp in the WinMain function as follows: | |
| a. | Add the following before calling InitInstance() statement | |
/* Note that this is a sample key, which will not work in your toolkit. You should replace the sample key */L_SetLicenseFile (TEXT("MyLicenseFile", TEXT("TestKey"));if (L_Doc2StartUp(&hDoc, NULL) != SUCCESS)return 0;L_Doc2CreateSettingsCollection(hDoc, -1, &nSId);L_Doc2SetActiveSettingsCollection(hDoc, nSId);
|
b. |
Add the following after the GetMessage() loop before return statement |
L_Doc2DeleteSettingsCollection(hDoc, nSId);L_Doc2ShutDown(&hDoc);
8. |
Edit EZFUNC.RC file in the OCR_Ltdoc2 directory and add the following lines: |
#include "EZFUNC.H"MAIN_MENU MENUBEGINMENUITEM "Insert Page" IDM_INSERT_PAGEMENUITEM "Save Added Page" IDM_SAVE_ADDED_PAGEEND
9. |
In Ezfunc.cpp in InitApplication, change the line: |
wcWindowClass.lpszMenuName = NULL; to:
wcWindowClass.lpszMenuName = TEXT("MAIN_MENU");
10. |
In Ezfunc.cpp in MainWndProc, change the line: |
Demos_CombinePath(szImagesDirectory, L_TEXT("Image1.cmp"), szFilename, _countof(szFilename)); To:
Demos_CombinePath(szImagesDirectory, L_TEXT("ocr1.tif"), szFilename, _countof(szFilename));
11. |
In Ezfunc.cpp in InitInstance, change the menu parameter (tagged as /* Use the window class menu */) in CreateWindow from NULL to LoadMenu(hInstance, MAKEINTRESOURCE("MAIN_MENU")), /*Main Menu*/ |
12. |
In Ezfunc.cpp under WM_CREATE, add the following code after "L_LoadBitmap() if(){}" : |
/*After code below*/nRet = L_LoadBitmap (szFilename, &LeadBitmap, sizeof(BITMAPHANDLE), 0, ORDER_BGR, NULL, NULL);if (nRet != SUCCESS){wsprintf (achBuff, TEXT("Error %d loading %s"), nRet, (LPTSTR) szFilename);MessageBox (NULL, achBuff, TEXT("Error"), MB_OK);/* We have an error, so post WM_DESTROY */PostMessage (hWnd, WM_DESTROY, 0, 0);return (FALSE);}/*After code above*//*Add code below*/bPageAdded = FALSE;
13. |
In Ezfunc.cpp after WM_PAINT and before WM_DESTROY, add a new switch statement called WM_COMMAND: |
/*After code below*/case WM_PAINT:/* Get the handle to the device context */hdc = BeginPaint (hWnd, &ps);if (LeadBitmap.Flags.Allocated) /* Do we have an image? */{if (hpalPaint) /* If we have a paint palette, select it */{hPalette = SelectPalette (hdc, hpalPaint, TRUE);/* Uncomment this if you do not process WM_QUERYNEWPALETTE *//* RealizePalette (hdc); */}/* Paint the image */L_PaintDC (hdc,&LeadBitmap,&rLeadSource, /* Source rectangle */NULL, /* Default source clip area */&rLeadDest, /* Destination rectangle */&ps.rcPaint, /* Dest clip set by WM_PAINT */SRCCOPY); /* Normal Paint */if (hpalPaint) /* Return old palette */SelectPalette (hdc, hPalette, TRUE);}EndPaint (hWnd, &ps); /* Return DC */return (0);/*After code Above*//*Add code below*/case WM_COMMAND:switch(LOWORD(wParam)){case IDM_INSERT_PAGE:{nRet = L_Doc2AddPage(hDoc, &LeadBitmap, 1);if (nRet != SUCCESS){wsprintf (achBuff, TEXT("Error %d adding page at index 0"), nRet);MessageBox (NULL, achBuff, TEXT("Error"), MB_OK);/* We have an error, so post WM_DESTROY */PostMessage (hWnd, WM_DESTROY, 0, 0);return (FALSE);}bPageAdded = TRUE;L_Doc2SetActivePage(hDoc, 0);memset(&PageInfo, 0, sizeof(PAGEINFO2));nRet = L_Doc2GetPageInfo (hDoc, 0, &PageInfo, sizeof(PAGEINFO2));if (nRet == SUCCESS){L_INT nPageCount = 0;L_Doc2GetPageCount(hDoc, &nPageCount);L_Doc2SetActivePage(hDoc, nPageCount - 1);/* Force paint palette creation */SendMessage (hWnd, WM_QUERYNEWPALETTE, 0, 0L);RedrawWindow(hWnd,0,0,256);wsprintf (achBuff, TEXT("Page Width = %d\nPage Height = %d\nPage Bits Per Pixel = %d\nPages Inserted = %d"),PageInfo.nWidth,PageInfo.nHeight,PageInfo.nBitsPerPixel,nPageCount);MessageBox (NULL, achBuff, TEXT("Pages Info"), MB_OK);}LangId[0] = DOC2_LANG_ID_ENGLISH;nRet = L_Doc2SelectLanguages(hDoc, LangId, 1);if (nRet != SUCCESS){wsprintf (achBuff, TEXT("Error %d Setting English as the default language."), nRet);MessageBox (NULL, achBuff, TEXT("Error"), MB_OK);RemoveDocumentPages();/* We have an error, so post WM_DESTROY */PostMessage (hWnd, WM_DESTROY, 0, 0);return (FALSE);}}break;case IDM_SAVE_ADDED_PAGE:{L_INT nPageCount=0;L_INT nRet = L_Doc2GetPageCount(hDoc, &nPageCount);if (nRet != SUCCESS){MessageBox(NULL, TEXT("Cannot get pages count"), TEXT("Error!"), MB_OK);return 0;}if (nPageCount <=0){MessageBox(NULL, TEXT("No added pages, please add pages first"), TEXT("Error!"), MB_OK);return 0;}BITMAPHANDLE ExportBmp;L_InitBitmap(&ExportBmp, sizeof(BITMAPHANDLE), 0, 0, 1);nRet = L_Doc2ExportPage(hDoc, &ExportBmp, sizeof(BITMAPHANDLE), 0);if (nRet != SUCCESS){MessageBox(NULL, TEXT("Cannot export page to save"), TEXT("Error!"), MB_OK);return 0;}nRet = L_SaveBitmap(TEXT("c:\\test.tif"),&ExportBmp,FILE_TIF,ExportBmp.BitsPerPixel,0,NULL);L_FreeBitmap(&ExportBmp);}break;}return 0;/*Add code above*/
14. |
Add the following function in EZFUNC.CPP in OCR_Ltdoc2 directory, add it at the end after "void CalcDisplay()" function: |
void RemoveDocumentPages(){L_INT nPageCount = 0;L_INT i, nRet;L_TCHAR szBuffer[1024];nRet = L_Doc2GetPageCount(hDoc, &nPageCount);if (nRet == SUCCESS){for (i=0; i<nPageCount; i++){L_Doc2CleanupPages(hDoc, TRUE);nRet = L_Doc2RemovePage(hDoc, i);if (nRet == SUCCESS){wsprintf(szBuffer, TEXT("The page # %d was removed successfully"), i);MessageBox(NULL, szBuffer, TEXT("Notice!"), MB_OK);}}}}
15. |
Also, add the following statement before the MainWndProc function |
void RemoveDocumentPages();
16. |
On the Build menu, select Build SimpleLoad.exe. |
17. |
On the Build menu, select Execute SimpleLoad.exe. (NOTE: Before building project, clean solution and project files. In Build, select Clean Solution and Clean SimpleLoad). |
18. |
Save this project to use it for testing other code samples. |