Re: [Dev-C++] display bitmap

[Daniel G. <sp...@ho...>]

If the bitmap couldn't be found though the error message would say so 
wouldn't it?
There's another GetLastError() call I think called GetLastErrorEx() or 
something (look on MSDN.com), maybe that will give more details?

Glad to hear the code works on someone's machine anyway!

Maybe the bitmap is too difficult to read? Is it a simple image?
Krzysztof what colour depth was your bitmap, maybe the code fails if it is 
24-bit or above perhaps? That matters a lot I hear with bitmaps.

>From: Krzysztof 'Saveman' Kapuscik <sa...@ze...>
>Reply-To: Krzysztof Kapuscik <sa...@op...>
>To: dev...@li...
>Subject: Re: [Dev-C++] display bitmap
>Date: Fri, 20 Jun 2003 13:48:18 +0200
>
>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
>
>mailto:sa...@op...
>http://www.saveman.w.pl
>
>
>
>
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