bitmap problem

This is a discussion on bitmap problem within the Windows Programming forums, part of the Platform Specific Boards category; Can anybody compile the below and help me fix the error. I've being trying to get bitmaps to work for ...

  1. #1
    yes, I'm registered!!! algi's Avatar
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    bitmap problem

    Can anybody compile the below and help me fix the error. I've being trying to get bitmaps to work for ages. If you can't does anybody know of a Bitmap tutorial for Dev C++ users. Thanks

    Code:
    #include <windows.h>
    
    
    HINSTANCE hInst;
    LRESULT CALLBACK WindProcedure(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam);
    
    INT WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
                       LPSTR lpCmdLine, int nCmdShow)
    {
        WNDCLASSEX  WndCls;
        static char szAppName[] = "BitmapIntro";
        MSG         Msg;
    
    	hInst       = hInstance;
        WndCls.cbSize        = sizeof(WndCls);
        WndCls.style         = CS_OWNDC | CS_VREDRAW | CS_HREDRAW;
        WndCls.lpfnWndProc   = WindProcedure;
        WndCls.cbClsExtra    = 0;
        WndCls.cbWndExtra    = 0;
        WndCls.hInstance     = hInst;
        WndCls.hIcon         = LoadIcon(NULL, IDI_APPLICATION);
        WndCls.hCursor       = LoadCursor(NULL, IDC_ARROW);
        WndCls.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
        WndCls.lpszMenuName  = NULL;
        WndCls.lpszClassName = szAppName;
        WndCls.hIconSm       = LoadIcon(hInstance, IDI_APPLICATION);
        RegisterClassEx(&WndCls);
    
        CreateWindowEx(WS_EX_OVERLAPPEDWINDOW,
                              szAppName,
                              "Bitmaps Fundamentals",
                              WS_OVERLAPPEDWINDOW | WS_VISIBLE,
                              CW_USEDEFAULT,
                              CW_USEDEFAULT,
                              CW_USEDEFAULT,
                              CW_USEDEFAULT,
                              NULL,
                              NULL,
                              hInstance,
                              NULL);
    
        while( GetMessage(&Msg, NULL, 0, 0) )
        {
            TranslateMessage(&Msg);
            DispatchMessage( &Msg);
        }
    
        return static_cast<int>(Msg.wParam);
    }
    
    LRESULT CALLBACK WindProcedure(HWND hWnd, UINT Msg,
    			   WPARAM wParam, LPARAM lParam)
    {
        HDC hDC, MemDCExercising;
        PAINTSTRUCT Ps;
        HBITMAP bmpExercising;
    
        switch(Msg)
        {
    	case WM_DESTROY:
    	    PostQuitMessage(WM_QUIT);
    	    break;
    	case WM_PAINT:
    	    hDC = BeginPaint(hWnd, &Ps);
    
    	    // Load the bitmap from the resource
    	    bmpExercising = LoadBitmap(hInst, "E:/Alex's Stuiff/Programming/win32/exercising.bmp"));
    	    // Create a memory device compatible with the above DC variable
    	    MemDCExercising = CreateCompatibleDC(hDC);
                 // Select the new bitmap
                 SelectObject(MemDCExercising, bmpExercising);
    
    	    // Copy the bits from the memory DC into the current dc
    	    BitBlt(hDC, 10, 10, 450, 400, MemDCExercising, 0, 0, SRCCOPY);
    
    	    // Restore the old bitmap
    	    DeleteDC(MemDCExercising);
    	    DeleteObject(bmpExercising);
    	    EndPaint(hWnd, &Ps);
    	    break;
    	default:
    	    return DefWindowProc(hWnd, Msg, wParam, lParam);
        }
        return 0;
    }
    I started out with nothing and I still have most of it left.

  2. #2
    Even death may die... Dante Shamest's Avatar
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    Code:
    	    // Load the bitmap from the resource
    	    bmpExercising = LoadBitmap(hInst, "E:/Alex's Stuiff/Programming/win32/exercising.bmp"));
    Although the comment says you're loading the bitmap from a resource, what you're actually doing is loading the bitmap from a file.

    If you wish to load the bitmap from a file, use LoadImage.

    Code:
    hBitmap = (HBITMAP)LoadImage(NULL,filename,IMAGE_BITMAP,0,0,LR_LOADFROMFILE) ;

  3. #3
    yes, I'm registered!!! algi's Avatar
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    when i type in the path to the image it contins "e:\alex's stuff..." and the compiler says \a is unknown. How do i get around this
    I started out with nothing and I still have most of it left.

  4. #4
    Rabite SirCrono6's Avatar
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    > "e:\alex's stuff..."
    Since \ begins an escape character you need to either use \\ or / in strings.

    - SirCrono6
    From C to shining C++!

    Great graphics, sounds, algorithms, AI, pathfinding, visual effects, cutscenes, etc., etc. do NOT make a good game.
    - Bubba

    IDE and Compiler - Code::Blocks with MinGW
    Operating System - Windows XP Professional x64 Edition

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