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Stretching an Image and Window

The following example stretches the images of a video clip and changes the aspect ratio of the displayed frames. The frames displayed in the MCIWnd window are twice the height and three times the width of the original frame. The MCIWndGetDest and MCIWndPutDest macros retrieve and redefine the destination rectangle coordinates. The GetWindowRect and SetWindowPos functions manage changes to the MCIWnd window dimensions.



// extern RECT rCurrent, rDest; 
 
case WM_COMMAND: 
   switch (wParam) 
   { 
       case IDM_CREATEMCIWND: 
           g_hwndMCIWnd = MCIWndCreate(hwnd, 
           g_hinst, 
           WS_CHILD | WS_VISIBLE, 
          "sample.avi"); 
           break;    
 
       case IDM_RESIZEWINDOW: // destination RECT and playback area
           GetWindowRect(g_hwndMCIWnd, &rWin);     // window size 
           MCIWndGetDest(g_hwndMCIWnd, &rCurrent); // destination RECT
           rDest.top = rCurrent.top;               // new boundaries 
           rDest.right = rCurrent.right; 
           rDest.left = rCurrent.left + 
               ((rCurrent.left - rCurrent.right) * 3); 
           rDest.bottom = rCurrent.top + 
               ((rCurrent.bottom - rCurrent.top) * 2); 
           MCIWndPutDest(g_hwndMCIWnd, &rDest); // new RECT
           SetWindowPos(g_hwndMCIWnd,           // window to resize 
               NULL,                          // z-order: don't care 
               0, 0,                          // position: don't care
               rDest.right - rDest.left,      // width 
               (rWin.bottom - rWin.top +           // height (window - 
               (rCurrent.bottom - rCurrent.top) +  //  original RECT +
               (rDest.bottom - rDest.top)),        //  new RECT
               SWP_NOMOVE | SWP_NOZORDER | SWP_NOACTIVATE); 
           break; 
   } 
   break; 
 
   // Handle other messages here. 


 

 

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