Menu
▾
▴
Re: [Dev-C++] display bitmap
|
From: Vlada D. <dj...@im...> - 2003-06-20 12:24:12
|
----- Original Message -----
From: "Krzysztof 'Saveman' Kapuscik" <sa...@ze...>
To: <dev...@li...>
Sent: Friday, June 20, 2003 1:48 PM
Subject: Re: [Dev-C++] display bitmap
> 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
>
>
I got it working now. The thing is that I was using the code in response to
WM_LBUTTONDOWN message, and now I changed it to use GetDC() for obtaining
device context instead of BeginPaint(). Thanks for help, guys.But would like
to now why I was getting that strange error. I can't believe it's that wrong
to use BeginPaint() outside the WM_PAINT message?
>
>
> -------------------------------------------------------
> This SF.Net email is sponsored by: INetU
> Attention Web Developers & Consultants: Become An INetU Hosting Partner.
> Refer Dedicated Servers. We Manage Them. You Get 10% Monthly Commission!
> INetU Dedicated Managed Hosting http://www.inetu.net/partner/index.php
> _______________________________________________
> Dev-cpp-users mailing list
> Dev...@li...
> TO UNSUBSCRIBE: http://www.noicys.cjb.net/devcpp/ub.htm
> https://lists.sourceforge.net/lists/listinfo/dev-cpp-users
>
|
