/*[]=====================================================================[]*/ /*[] LEADTOOLS for Windows - Version 11 []*/ /*[] []*/ /*[] []*/ /*[] Copyright (c) 1991-2000 LEAD Technologies, Inc. []*/ /*[] All Rights Reserved. []*/ /*[]=====================================================================[]*/ /*---(Resize)--------------------------------------------------------------- LEAD Functions Used. L_FileInfo L_SetDisplayMode L_InitBitmap L_StartResize L_LoadFile L_StopResize L_CreatePaintPalette L_PaintDC L_FreeBitmap L_PaintDCBuffer L_AccessBitmap L_PutBitmapRow L_Resize L_ReleaseBitmap We have made the assumption that the user has the knowledge of programing in C and Windows. This example will: 1. load the image from a file, whose name is sent through the command line, using L_LoadFile, 2. resize the image during loading using the L_Resize system, 3. display both the original and resized image during loading, 4. place the resized image over the original in the bitmap, 5. display the "image within an image" bitmap. Usage: RESIZE --------------------------------------------------------------------------*/ #include /* Required for all Windows applications. */ #include /* Needed for message crackers. */ #include "tchar.h" #include /* For _fmemcpy. */ #include #include "..\\..\\..\\include\\l_bitmap.h" /* LEADTOOLS main header file. */ #include "..\\..\\..\\include\\l_error.h" /* LEADTOOLS error definition header file. */ #include "Resize.h" /* Application specific header file. */ L_BOOL ExtractCommandData ( ) ; /*---[WinMain]--------------------------------------------------------------- Syntax: int PASCAL WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow ) Parameters: hInstance Current instance. hPrevInstance previous instance. lpCmdLine command line. nCmdShow show-window type. Prototype: Windows.h Notes: Windows main function, calls initialization function and processes message loop. --------------------------------------------------------------------------*/ int PASCAL WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) { MSG msg; /* Message structure, See Windows SDK for more information. */ UNLOCKSUPPORT(); if (!hPrevInstance) /* Other instances of app running? */ if (!InitApplication (hInstance)) /* Initialize shared things. */ return (FALSE); /* Exits if unable to initialize. */ ExtractCommandData ( ) ; if (!InitInstance (hInstance, nCmdShow)) /* Do instance initializations. */ return (FALSE); /* Acquire and dispatch messages until a WM_QUIT message is received. */ while (GetMessage (&msg, NULL, 0, 0)) { TranslateMessage (&msg); /* Translates virtual key codes. */ DispatchMessage (&msg); /* Dispatches message to window. */ } return (msg.wParam); /* Returns the value from PostQuitMessage. */ } /*---[InitApplication]------------------------------------------------------ Syntax: L_BOOL InitApplication( HANDLE hInstance ) Parameters: hInstance Current instance. Prototype: Resize.h Notes: Initializes window class structure and registers window class. --------------------------------------------------------------------------*/ L_BOOL InitApplication (HANDLE hInstance) { WNDCLASS wcWindowClass; wcWindowClass.style = 0; /* Class style(s). */ wcWindowClass.lpfnWndProc = MainWndProc; /* Function to retrieve messages */ /* for windows of this class. */ wcWindowClass.cbClsExtra = 0;/* No per-class extra data. */ wcWindowClass.cbWndExtra = 0;/* No per-window extra data. */ wcWindowClass.hInstance = hInstance; /* Owner. */ wcWindowClass.hIcon = LoadIcon (hInstance, TEXT("LEAD")); wcWindowClass.hCursor = LoadCursor (NULL, IDC_ARROW); wcWindowClass.hbrBackground = GetStockObject (WHITE_BRUSH); wcWindowClass.lpszMenuName = NULL; /* No menu. */ wcWindowClass.lpszClassName = TEXT("LEADWClass"); /* Name. */ /* Register the window class and return the result code. */ return (RegisterClass (&wcWindowClass)); } /*---[InitInstance]---------------------------------------------------------- Syntax: L_BOOL InitInstance( HANDLE hInstance, L_INT nCmdShow ) Parameters: hInstance Current instance. nCmdShow Param for first ShowWindow() call. Prototype: Resize.h Notes: Saves instance handle and creates main window. --------------------------------------------------------------------------*/ L_BOOL InitInstance (HANDLE hInstance, L_INT nCmdShow) { HWND hWnd; /* Window handle. */ L_INT nRet; L_TCHAR buf[1024]; /* Get image information. */ Data.FileInfo.uStructSize = sizeof(FILEINFO); if ((nRet = L_FileInfo (Data.szFilename, &Data.FileInfo, sizeof(FILEINFO), 0, NULL)) != SUCCESS) { wsprintf (buf, TEXT("ERROR %d from L_FileInfo on file %s"), nRet, (LPSTR) Data.szFilename); MessageBox (NULL, buf, TEXT("ERROR"), MB_OK); return (FALSE); } hInst = hInstance; bFirst = TRUE; /* Set Ordered Dithering for the Display */ L_SetDisplayMode (DISPLAYMODE_ORDEREDDITHER, DISPLAYMODE_ORDEREDDITHER); /* Set up RECT for window sizing. */ rWndSize.top = 0; rWndSize.left = 0; rWndSize.bottom = INFOHEIGHT(&Data.FileInfo); rWndSize.right = INFOWIDTH(&Data.FileInfo); /* Create RECT to size of image plus window frame. */ AdjustWindowRect (&rWndSize, WS_OVERLAPPEDWINDOW, FALSE); /* Create a main window for this application instance. */ hWnd = CreateWindow ( TEXT("LEADWClass"), TEXT("LEADTOOLS Sample Application"), /* Window title */ WS_OVERLAPPEDWINDOW, /* Window style. */ CW_USEDEFAULT, /* Default horizontal position. */ CW_USEDEFAULT, /* Default vertical position. */ rWndSize.right - rWndSize.left, /* Window width. */ rWndSize.bottom - rWndSize.top, /* Window height. */ NULL, /* Overlapped windows have no parent. */ NULL, /* Use the window class menu. */ hInstance, /* This instance owns this window. */ NULL /* Pointer not needed. */ ); if (hWnd == NULL) return (FALSE); /* If window could not be created, return "failure". */ ShowWindow (hWnd, nCmdShow); /* Show the window. */ UpdateWindow (hWnd); /* Send WM_PAINT message. */ return (TRUE); } /*---[MainWndProc]----------------------------------------------------------- Syntax: L_INT32 EXT_FUNCTION MainWndProc( HWND hWnd, L_UINT message, WPARAM wParam, LPARAM lParam ) Parameters: hWnd Window handle. message Type of message. wParam Additional information. lParam Additional information. Prototype: Resize.h Notes: This procedure is responsible for handling window messages. --------------------------------------------------------------------------*/ L_INT32 EXT_FUNCTION MainWndProc (HWND hWnd, L_UINT Message, WPARAM wParam, LPARAM lParam) { switch (Message) { HANDLE_MSG (hWnd, WM_COMMAND, Window_OnCommand); HANDLE_MSG (hWnd, WM_PALETTECHANGED, Window_OnPaletteChanged); HANDLE_MSG (hWnd, WM_QUERYNEWPALETTE, Window_OnQueryNewPalette); HANDLE_MSG (hWnd, WM_PALETTEISCHANGING, Window_OnPaletteChanging); HANDLE_MSG (hWnd, WM_SYSCOLORCHANGE, Window_SysColorChange); HANDLE_MSG (hWnd, WM_ACTIVATE, Window_OnActivate); HANDLE_MSG (hWnd, WM_PAINT, Window_OnPaint); HANDLE_MSG (hWnd, WM_DESTROY, Window_OnDestroy); } return DefWindowProc (hWnd, Message, wParam, lParam); } /*---[Window_OnCommand]----------------------------------------------------- Syntax: VOID Window_OnCommand( HWND hWnd, L_INT id, HWND hwndCtl, UINT codeNotify ) Parameters: hWnd Window handle. id Menu item or Control ID. hwndCtl 0 if menu item selected, else window handle of the control. codeNotify 1 if accelerator keystroke, else notification code, such as BN_CLICKED. Prototype: Resize.h Notes: This procedure is responsible for handling WM_ONCOMMAND. --------------------------------------------------------------------------*/ VOID Window_OnCommand (HWND hWnd, L_INT id, HWND hwndCtl, UINT codeNotify) { static IMAGECBPARM Parm; HDC hdc; L_INT nRet; L_TCHAR buf[1024]; /* buffer to hold the error message */ UNREFERENCED_PARAMETER (id); UNREFERENCED_PARAMETER (hwndCtl); UNREFERENCED_PARAMETER (codeNotify); L_InitBitmap (&Data.BitmapHandle, sizeof(BITMAPHANDLE), Data.FileInfo.Width, Data.FileInfo.Height, Data.FileInfo.BitsPerPixel); /* Initialize L_Resize the function call. */ Data.ReadRowCounter = 0; L_StartResize (Data.FileInfo.Width, Data.FileInfo.Height, Data.FileInfo.Width / 2, Data.FileInfo.Height / 2, &Parm.pWindowResizeData); /* Set the callback function. */ hdc = GetDC (hWnd); /* Get DC */ GetClientRect (hWnd, &Parm.rcClient); Parm.hwnd = hWnd; Parm.hdc = hdc; Parm.hPalette = NULL; Parm.rcPaint = Parm.rcClient; Parm.nDispRow = 0; nRet = L_LoadFile (Data.szFilename, &Data.BitmapHandle, sizeof(BITMAPHANDLE), Data.BitmapHandle.BitsPerPixel, Data.BitmapHandle.Order, LOADFILE_ALLOCATE, LoadImageCB, &Parm, NULL, &Data.FileInfo); InvalidateRect ( hWnd, NULL, TRUE ) ; UpdateWindow ( hWnd ) ; if (nRet != SUCCESS) { wsprintf (buf, TEXT("Error %d Loading %s"), nRet, (LPSTR) Data.szFilename); MessageBox (hWnd, buf, TEXT("Error"), MB_OK); } /* Free things. */ if( hLineBuff ) { GlobalUnlock (hLineBuff); GlobalFree (hLineBuff); hLineBuff = NULL; } L_StopResize (Parm.pWindowResizeData); ReleaseDC (hWnd, hdc); return; } /*---[Window_OnActivate]----------------------------------------------------- Syntax: VOID Window_OnActivate(HWND hwnd, UINT state, HWND hwndActDeact, BOOL fMinimized) Parameters: hWnd Window handle. state WA_ACTIVE | WA_CLICKACTIVE | WA_INACTIVE hwndActDeact the winodw habdle that deactivate fMinimized Window is minimized Prototype: Color.h Notes: This procedure is responsible for handling WM_ONCOMMAND. --------------------------------------------------------------------------*/ void Window_OnActivate(HWND hwnd, UINT state, HWND hwndActDeact, BOOL fMinimized) { if(state!=WA_INACTIVE) Window_OnQueryNewPalette (hwnd); } /*----(Window_OnPaletteChanged)-------------------------------------------- Syntax: VOID Window_OnPaletteChanged( HWND hWnd, HWND hWndPaletteChange ) Parameters: hwnd Handle to a window. hWndPaletteChange Handle to a window that has the palette realized. Prototype: Resize.h Notes: This procedure is responsible for handling WM_PALETTECHANGED. --------------------------------------------------------------------------*/ VOID Window_OnPaletteChanged (HWND hWnd, HWND hWndPaletteChange) { HDC hDC; HPALETTE hPalette; /* If this window initiated the palette change, do nothing. */ if (hWnd == hWndPaletteChange) return; /* Delete the previous palette, if there is one. */ if (Data.hPalette) { DeleteObject (Data.hPalette); Data.hPalette = NULL; } /* Does this window have a bitmap and a palette? */ if (Data.BitmapHandle.Flags.Allocated) { hDC = GetDC (hWnd); /* Generate a new logical palette (if needed) for painting. */ Data.hPalette = L_CreatePaintPalette (hDC, &Data.BitmapHandle); /* Select and Realize the palette. */ hPalette = SelectPalette (hDC, Data.hPalette, TRUE); RealizePalette (hDC); /* Force a repaint. */ InvalidateRect (hWnd, NULL, FALSE); /* Return the old palette. */ SelectPalette (hDC, hPalette, TRUE); ReleaseDC (hWnd, hDC); } return; } /*====(Window_OnPaletteChanging)========================================== Description: Enumerates all child windows and asks them to realize their logical palettes beside the physical palette. Syntax : VOID Window_OnPaletteChanging(HWND hwnd, HWND hWndPaletteChange) Parameters : hwnd Handle to a window. hWndPaletteChange Handle to a window that has the palette realized. Return Value: None. ==========================================================================*/ VOID Window_OnPaletteChanging(HWND hWnd, HWND hWndPaletteChange) { Window_OnPaletteChanged (hWnd, hWndPaletteChange); } /*====(Window_SysColorChange)========================================== Syntax: VOID Window_SysColorChange( HWND hWnd ) Parameters: hWnd Handle to a window. Prototype: Loadsave.h Notes: This procedure is responsible for handling WM_SYSCOLORCHANGE. --------------------------------------------------------------------------*/ VOID Window_SysColorChange(HWND hwnd) { Window_OnQueryNewPalette (hwnd); } /*----(Window_OnQueryNewPalette)-------------------------------------------- Syntax: BOOL Window_OnQueryNewPalette( HWND hWnd ) Parameters: hWnd Handle to a window. Prototype: Resize.h Notes: This procedure is responsible for handling WM_QUERYNEWPALETTE. --------------------------------------------------------------------------*/ BOOL Window_OnQueryNewPalette (HWND hWnd) { HDC hDC; HPALETTE hPalette; L_INT nNoColors = 0; /* Delete the previous palette, if there is one. */ if (Data.hPalette) { DeleteObject (Data.hPalette); Data.hPalette = NULL; } if (Data.BitmapHandle.Flags.Allocated) { hDC = GetDC (hWnd); /* Generate a new logical palette (if needed) for painting. */ Data.hPalette = L_CreatePaintPalette (hDC, &Data.BitmapHandle); if (Data.hPalette) /* Is a palette needed? */ { hPalette = SelectPalette (hDC, Data.hPalette, FALSE); nNoColors = RealizePalette (hDC); if (nNoColors) /* If the palette changed, force a WM_PAINT */ InvalidateRect (hWnd, NULL, FALSE); /* Restore the old palette. */ SelectPalette (hDC, hPalette, TRUE); } ReleaseDC (hWnd, hDC); } return (nNoColors); } /*---[Window_OnPaint]------------------------------------------------------- Syntax: VOID Window_OnPaint( HWND hWnd ); Parameters: hWnd Window handle. Prototype: Resize.h Notes: This procedure is responsible for handling WM_PAINT. --------------------------------------------------------------------------*/ VOID Window_OnPaint (HWND hWnd) { HDC hdc; RECT rc; PAINTSTRUCT ps; HPALETTE hOldPal = NULL; hdc = BeginPaint (hWnd, &ps);/* Get DC */ if (Data.BitmapHandle.Flags.Allocated) /* Do we have an image? */ { if (Data.hPalette) /* Is there a palette that needs to be selected? */ hOldPal = SelectPalette (hdc, Data.hPalette, TRUE); /* Select it. */ /* Setup the Destination Rectangle. */ SetRect (&rc, 0, 0, BITMAPWIDTH(&Data.BitmapHandle), BITMAPHEIGHT(&Data.BitmapHandle)); /* Paint it */ L_PaintDC (hdc, &Data.BitmapHandle, NULL, NULL, &rc, &ps.rcPaint, SRCCOPY); if (Data.hPalette) /* Return old palette if there is one. */ SelectPalette (hdc, hOldPal, TRUE); } EndPaint (hWnd, &ps); /* Return DC */ if (bFirst) { bFirst = FALSE; FORWARD_WM_COMMAND (hWnd, NULL, 0, 0, PostMessage); } return; } /*---[Window_OnDestroy]---------------------------------------------------- Syntax: VOID Window_OnDestroy( HWND hWnd ); Parameters: hWnd Window handle. Prototype: Resize.h Notes: This procedure is responsible for handling WM_DESTROY. --------------------------------------------------------------------------*/ VOID Window_OnDestroy (HWND hWnd) { UNREFERENCED_PARAMETER (hWnd); if (Data.BitmapHandle.Flags.Allocated) /* Do we have an image? */ L_FreeBitmap (&Data.BitmapHandle); if (Data.hPalette) /* Delete palette if there is one. */ DeleteObject (Data.hPalette); PostQuitMessage (0); /* Post WM_QUIT, to end the application. */ return; } #if !defined(__BORLANDC__) || (defined(__BORLANDC__) && defined(FOR_WIN32)) #define FMEMCPY _fmemcpy #else /* handle segment crossing */ void _far * FMEMCPY(void _far *s1, const void _far *s2, size_t n) { char _huge *su1; const char _huge *su2; for(su1 = (char _huge *) s1, su2 = (const char _huge *) s2; 0 < n; ++su1, ++su2, --n) *su1 = *su2; return(s1); } #endif /*---[LoadImageCB]----------------------------------------------------------- Syntax: L_INT L_EXPORT LoadImageCB (pFILEINFO pFileInfo, pBITMAPHANDLE pBitmap, L_CHAR L_FAR * pBuffer, L_UINT uFlags, L_INT nRow, L_INT nLines, IMAGECBPARM L_FAR* pParm) Parameters: pBitmap Pointer to the bitmap handle. pBuffer Pointer to the buffer that contains the decompress data. nLines The number of decompressed lines. pParam Additional information used to know the number of rows. Notes: This procedure is responsible for handling the image data passed from L_LoadFile. This function will paint the buffer to the screen, demonstrating "Paint While Load". It also will put the image data in the bitmap (something loadfile can do for you!). This procedure will also resize the image data to half size and put that data into the image for an "Image Within an Image" display. --------------------------------------------------------------------------*/ L_INT L_EXPORT LoadImageCB (pFILEINFO pFileInfo, pBITMAPHANDLE pBitmap, L_UCHAR L_FAR * pBuffer, L_UINT uFlags, L_INT nRow, L_INT nLines, IMAGECBPARM L_FAR * pParm) { L_INT row = 0; L_INT Height = 0; L_INT Width = 0; L_INT32 nRet32; RECT rc; if ((uFlags & FILEREAD_FIRSTPASS) && (uFlags & FILEREAD_FIRSTROW)) { hLineBuff = GlobalAlloc (GMEM_MOVEABLE, pBitmap->BytesPerLine); lpLineBuff = (L_UCHAR L_HUGE *) GlobalLock (hLineBuff); if (GetFocus () == pParm->hwnd) FORWARD_WM_QUERYNEWPALETTE (pParm->hwnd, SendMessage); if (Data.hPalette) pParm->hPalette = SelectPalette (pParm->hdc, Data.hPalette, TRUE); } SetRect (&rc, 0, 0, BITMAPWIDTH(pBitmap), BITMAPHEIGHT(pBitmap)); L_PaintDCBuffer (pParm->hdc, pBitmap, NULL, NULL, &rc, &pParm->rcClient, SRCCOPY, pBuffer, nRow, nLines); /* Paint the inset */ if (pBitmap->ViewPerspective == BOTTOM_LEFT) SetRect (&rc, 0, pBitmap->Height / 2, pBitmap->Width / 2, pBitmap->Height); else SetRect (&rc, 0, 0, pBitmap->Width / 2, pBitmap->Height / 2); L_PaintDCBuffer (pParm->hdc, pBitmap, NULL, NULL, &rc, &rc, SRCCOPY, pBuffer, nRow, nLines); /* Lock the bitmap. */ L_AccessBitmap (pBitmap); for (row = 0; row < nLines; row++) { FMEMCPY (lpLineBuff, (L_UCHAR L_HUGE *) pBuffer + (row * (L_INT32) pBitmap->BytesPerLine), pBitmap->BytesPerLine); nRet32 = L_PutBitmapRow (pBitmap, lpLineBuff, nRow, (L_UINT32) pBitmap->BytesPerLine); if (nRet32 != (L_INT32) pBitmap->BytesPerLine) MessageBox (NULL, TEXT("Error putting image data!"), TEXT("ERROR"), MB_OK); L_Resize ((L_VOID L_FAR *) lpLineBuff, nRow, pBitmap->BitsPerPixel, &Width, &Height, pParm->pWindowResizeData); while (Height--) { nRet32 = L_PutBitmapRow (pBitmap, lpLineBuff, pParm->nDispRow, (L_UINT32) Width * pBitmap->BitsPerPixel / 8); if (nRet32 != (L_INT32) (L_UINT32) Width * pBitmap->BitsPerPixel / 8) MessageBox (NULL, TEXT("Error putting subimage data!"), TEXT("ERROR"), MB_OK); pParm->nDispRow++; } nRow++; } /* Unlock the bitmap. */ L_ReleaseBitmap (pBitmap); return (SUCCESS); } /*---[ExtractCommandData]---------------------------------------------------- Syntax: L_BOOL ExtractCommandData( ); Parameters: None. ProtoType: resize.c Notes: - This procedure is responsible for extracting the file name passed through the command line. - You should call this function only in WinMain function. --------------------------------------------------------------------------*/ L_BOOL ExtractCommandData ( ) { LPTSTR pszFirst = NULL; LPTSTR pszCmdLine = NULL; LPTSTR psz = NULL; L_INT nFirstPos = 0 ; L_INT nStringLen = 0 ; pszCmdLine = GetCommandLine(); nStringLen = lstrlen ( pszCmdLine ) + 1 ; // To specify that it is command line or not. if(( pszCmdLine[1] == ':' ) || // Shortcut case ( pszCmdLine[2] == ':' )) //VS case { // 1- TRY TO EXPOSE THE EXE NAME FROM THE COMMAND LINE psz = _tcschr ( pszCmdLine, ':' ) ; if ( NULL == psz ) { return FALSE ; } } else { psz = pszCmdLine ; } pszFirst = _tcschr ( psz + 1, ':' ) ; if ( NULL == pszFirst ) { return FALSE ; } // Calc the char number to the image file name. nFirstPos = pszFirst - pszCmdLine - 1 ; if ( 0 > nFirstPos ) { return FALSE ; } memset ( Data.szFilename, 0, sizeof ( Data.szFilename ) ); lstrcpyn ( Data.szFilename, pszFirst - 1, ( nStringLen - nFirstPos ) ) ; return TRUE; }