Attachment 4036 Details for Bug 5274 – Test program

Test program

damage-bug-3.c (text/plain), 3.75 KB, created by Søren Sandmann Pedersen on 2005-12-08 07:38:35 UTC

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Creator: Søren Sandmann Pedersen

Created: 2005-12-08 07:38:35 UTC

Size: 3.75 KB

patch

obsolete

>#include <X11/Xlib.h>
>#include <X11/extensions/Xcomposite.h>
>#include <stdlib.h>
>#include <stdio.h>
>#include <unistd.h>
>
>static int comp_event;
>static int comp_error;
>
>/* This program demonstrates that redirected windows that are
> * raised on top of non-redirected ones get their backgrounds
> * drawn and have expose events sent.
> */
>
>static void
>disaster (const char *what)
>{
>    fprintf (stderr, "Error: %s\n", what);
>    exit (0);
>}
>
>static void
>dump_events (Display *dpy, const char *header)
>{
>    XSync (dpy, False);
>    
>    if (header)
>	printf ("%s", header);
>    
>    while (XPending (dpy))
>    {
>	XEvent event;
>	
>	XNextEvent (dpy, &event);
>
>	if (header)
>	    printf ("  event: %d  (%lx)\n", event.type, event.xany.window);
>    }
>}
>
>int
>main (int argc, char **argv)
>{
>    Display *dpy;
>    Window main_window;
>    Window redirected_window;
>    Window non_redirected_window;
>    XGCValues gc_values;
>    GC gc;
>
>    dpy = XOpenDisplay (NULL);
>
>    /* Create main window */
>    
>    main_window = XCreateSimpleWindow (dpy, XDefaultRootWindow (dpy),
>				       100, 100, 600, 400, 0, 0, 0xffffffff);
>    XMapWindow (dpy, main_window);
>
>    if (!XCompositeQueryExtension (dpy, &comp_event, &comp_error))
>	disaster ("No composite extension found\n");
>    
>    XCompositeRedirectSubwindows (dpy,
>				  main_window,
>				  CompositeRedirectManual);
>    
>    /* (1) Create redirected subwindow with a blue background */
>
>    redirected_window = XCreateSimpleWindow (dpy, main_window,
>					     50, 50, 500, 300,
>					     0, 0, 0x000000ff);
>    XSelectInput (dpy, redirected_window, ExposureMask);
>    XMapWindow (dpy, redirected_window);
>
>    /* (2) Create unredirected subwindow, completely covering
>     * the redirected one
>     */
>    non_redirected_window = XCreateSimpleWindow (dpy, main_window,
>						 25, 25, 550, 350,
>						 0, 0, 0xaaaaaaaa);
>    XMapWindow (dpy, non_redirected_window);
>
>    XCompositeUnredirectWindow (dpy, non_redirected_window,
>				CompositeRedirectManual);
>
>    /* Discard events caused by unredirect */
>    dump_events (dpy, NULL);
>    
>    /* (3) Paint the redirected window pink */
>    gc_values.foreground = 0x00ff00ff;  /* pink */
>    gc = XCreateGC (dpy, redirected_window, GCForeground, &gc_values);
>    XFillRectangle (dpy, redirected_window, gc, 0, 0, 1000, 300);
>
>    /* (4) Copy all of the redirected window to the non-redirected one,
>     * making the non-redirected window mostly pink
>     */
>    XCopyArea (dpy, redirected_window, non_redirected_window, gc,
>	       0, 0, 500, 300, 0, 0);
>
>    /* Discard all events so far */
>    dump_events (dpy, NULL);
>
>    /* (5) Sleep for one second, during which the non-redirected window should
>     * be pink
>     */
>    sleep (1);
>
>    /* (6) Raise the redirected window. Since it's redirected, this
>     * should have no effect, but it does:
>     *
>     *    - expose events are sent
>     *    - the redirected window has its background painted
>     *    - damage events are also sent (not demonstrated by this program)
>     *
>     */
>    XRaiseWindow (dpy, redirected_window);
>
>    dump_events (dpy, "Events after raising the redirected window");
>
>    /* (7) Raise the non redirected window again */
>    XRaiseWindow (dpy, non_redirected_window);
>
>    /* (8) Paint it black */
>    gc_values.foreground = 0x00000000;
>    gc = XCreateGC (dpy, non_redirected_window, GCForeground, &gc_values);
>    XFillRectangle (dpy, non_redirected_window, gc, 0, 0, 550, 350);
>    
>    /* (9) Copy all of the redirected window to the non-redirected one */
>    XCopyArea (dpy, redirected_window, non_redirected_window, gc,
>	       0, 0, 500, 300, 0, 0);
>
>    XFlush (dpy);
>
>    /* (10) We should now be seeing a pink rectangle, but we do in fact
>     * see a blue one, since the redirected window had its background
>     * painted
>     */
>    
>    sleep (100);
>}

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