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 MCIWndGetDest5_QL_A6 and MCIWndPutDest14D3FFN macros retrieve and redefine the destination rectangle coordinates. The GetWindowRect98Z17T and SetWindowPos4557_V1 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.