Re: [Dev-C++] display bitmap

[Krzysztof 'S. K. <sa...@ze...>]

Hello Vlada,

Friday, June 20, 2003, 12:27:55 PM, you wrote:

VD> Hi.
VD> In this piece of code, I try to load bitmap image from a file and display it
VD> in a window. When I run the program, nothing happens. After the call to
VD> LoadImage(), I call the error() function, which calls GetLastError() and
VD> displays a message box with error description. In this way, I receive a
VD> message "Not enough storage is available to process this command". Now, I'm
VD> not sure if there something wrong with the code, or I realy run out of
VD> memory (which I doubt). My computer is Pentium 2 with 128 MB RAM and 20GB
VD> hard drive. This code is actually the only code in this program, except for
VD> standard Windows code, so I don't think there should be any memory leak. Can
VD> you tell me if the code is OK?
VD> P.S. I should also say that there's no message "Could not load image", so I
VD> guess the bitmap handle is valid?
VD> How can that be if LoadImage() could not be completed?
VD> -------------------------------------
VD> ------------
VD> Vlada

I don't know what's wrong with you code, because it works on my machine :)

But I changed it a bit - look there:
(i putted it into WindowProcedure)

   HBITMAP hBitmap;
   LPTSTR szFileName = TEXT("bitmapa.bmp");
   BITMAP bmp;
   HBITMAP hOldBMP;
   PAINTSTRUCT ps;
   HDC hDC;
   HDC memDC;

    switch (message)                  /* handle the messages */
    {
        case WM_PAINT:
            hBitmap =(HBITMAP)LoadImage(GetModuleHandle(NULL), szFileName,
                    IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE|LR_CREATEDIBSECTION);
            if(hBitmap)
            {
               GetObject(hBitmap, sizeof(BITMAP), &bmp);
               hDC = BeginPaint(hwnd, &ps);
               memDC = CreateCompatibleDC(hDC);
               hOldBMP = (HBITMAP)SelectObject(memDC, hBitmap);
               BitBlt(hDC, 0, 0, bmp.bmWidth, bmp.bmHeight, memDC, 0, 0, SRCCOPY);
               SelectObject(memDC, hOldBMP);
               DeleteDC(memDC);
               EndPaint(hwnd, &ps);
               DeleteObject(hBitmap);
            }
            else
            {
               // you could get additional info about error here
               // using GetLastError()
               MessageBox(hwnd, "Could not load image", "Error", MB_OK);
            }
            break;
        case WM_DESTROY:
            PostQuitMessage (0);       /* send a WM_QUIT to the message queue */
            break;
        default:                      /* for messages that we don't deal with */
            return DefWindowProc (hwnd, message, wParam, lParam);
    }


Check if your "bitmapa.bmp" file is inside default program directory...

-- 
Best regards,
 Krzysztof

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