Stretching an Image

The following example stretches the images of a video clip. It increases the dimensions of the destination rectangle by using the MCIWndPutDest14D3FFN macro. The size of the playback area remains unchanged, so the result is a distorted, magnified image. The examples uses the MCIWndPutDest function to reposition the destination rectangle with respect to the playback area, providing a way to view different portions of the stretched image.

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_STRETCHIMAGE:      // stretch destination RECT 3:2,

           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 destination

           break;

       case IDM_MOVEDOWN:           // move toward bottom of image

           MCIWndGetDest(g_hwndMCIWnd, &rCurrent); // destination RECT

           rCurrent.top -= 100;                    // new boundaries

           rCurrent.bottom -= 100;

           MCIWndPutDest(g_hwndMCIWnd, &rCurrent); // new destination

           break;

       case IDM_MOVEUP:             // move toward top of image

           MCIWndGetDest(g_hwndMCIWnd, &rCurrent); // destination RECT

           rCurrent.top += 100;                    // new boundaries

           rCurrent.bottom += 100;

           MCIWndPutDest(g_hwndMCIWnd, &rCurrent); // new destination

           break;

       case IDM_MOVELEFT:           // move toward left edge of image

           MCIWndGetDest(g_hwndMCIWnd, &rCurrent); // destination RECT

           rCurrent.right += 100;                  // new boundaries

           rCurrent.left += 100;

           MCIWndPutDest(g_hwndMCIWnd, &rCurrent); // new destination

           break;

       case  IDM_MOVERIGHT:         // move toward right edge of image

           MCIWndGetDest(g_hwndMCIWnd, &rCurrent); // destination RECT

           rCurrent.right -= 100;                  // new boundaries

           rCurrent.left -= 100;

           MCIWndPutDest(g_hwndMCIWnd, &rCurrent); // new destination

           break;

   }

   break;

   // Handle other messages here.