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POhow to display two bitmap image on window in C
 

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  1. POhow to display two bitmap image on window in C
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    <p>i can successfully display single image on window , i'm not sure how to display two images on window. i repeated the same code for difference image but its not working. here is a code to display single image.</p> <pre><code> static HBITMAP bmpSource = NULL; static HDC hdcSource = NULL; PAINTSTRUCT ps; HDC hdcDestination; //* inside the WndProc() case WM_PAINT: bmpSource = (HBITMAP)LoadImage(NULL,file_path,IMAGE_BITMAP,0,0,LR_LOADFROMFILE); hdcSource = CreateCompatibleDC(GetDC(0)); SelectObject(hdcSource, bmpSource); hdcDestination = BeginPaint(hwnd, &amp;ps); BitBlt(hdcDestination,img_x, img_y, 300, 300, hdcSource, 0, 0, SRCCOPY); EndPaint(hwnd, &amp;ps); breaks; //** </code></pre> <p>here is what i'm doing , i have experience in window gui . </p> <pre><code> static HBITMAP bmpSource = NULL,bmpSource2 = NULL; static HDC hdcSource = NULL,hdcSource2 = NULL; PAINTSTRUCT ps; HDC hdcDestination; //* inside the WndProc() case WM_PAINT: bmpSource = (HBITMAP)LoadImage(NULL,file_path,IMAGE_BITMAP,0,0,LR_LOADFROMFILE); hdcSource = CreateCompatibleDC(GetDC(0)); SelectObject(hdcSource, bmpSource); bmpSource2 = (HBITMAP)LoadImage(NULL,file2_path,IMAGE_BITMAP,0,0,LR_LOADFROMFILE); hdcSource2 = CreateCompatibleDC(GetDC(0)); SelectObject(hdcSource2, bmpSource2); hdcDestination = BeginPaint(hwnd, &amp;ps); BitBlt(hdcDestination,img_x, img_y, 300, 300, hdcSource, 0, 0, SRCCOPY); BitBlt(hdcDestination,img2_x, img2_y, 300, 300, hdcSource2, 0, 0, SRCCOPY); EndPaint(hwnd, &amp;ps); breaks; //** </code></pre>
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    1. USsiddstuff
    1. USsiddstuff
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    1. COYou're not releasing the DCs you get with `GetDC`, saving/restoring the old bitmaps when you select with `SelectObject`, nor deleting the DCs you create with `CreateCompatibleDC`. You will very soon run out of GDI resources.
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      1. POhow to display two bitmap image on window in C
      1. USJonathan Potter
    2. COIf `img_x` = `img2_x` and `img_y` = `img2_y`, then you will only see the second image because it would be drawn exactly over the first one. Apart from this, you are leaking too many resources (refer Jonathan's comment above).
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      1. POhow to display two bitmap image on window in C
      1. USAnish Ramaswamy
    3. COAlso, when you say _"its not working"_, what __exactly__ do you see?
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      1. POhow to display two bitmap image on window in C
      1. USAnish Ramaswamy
 

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