Attachment 19364 Details for Bug 16257 – Minimal test program to demonstrate bug

Minimal test program to demonstrate bug

fbc-bug-xlib.c (text/x-csrc), 2.12 KB, created by Carl Worth on 2008-10-03 23:53:16 UTC

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Creator: Carl Worth

Created: 2008-10-03 23:53:16 UTC

Size: 2.12 KB

patch

obsolete

>/* cc $(pkg-config --cflags --libs x11) -o fbc-bug-xlib fbc-bug-xlib.c */
>
>/*
> * Draw random-colored pixels with XPutImage to exercise a bug in the
> * frame-buffer compression code in the xf86-video-intel 965 driver.
> *
> * When a driver has the bug, rendering from this program will appear
> * to "freeze" every 15 seconds or so, (until the window is moved or
> * its decorations are redrawn, etc.).
> */
>
>#include <stdio.h>
>#include <stdlib.h>
>#include <stdint.h>
>#include <unistd.h>
>
>#include <X11/Xlib.h>
>#include <X11/Xutil.h>
>
>#define WIDTH  256
>#define HEIGHT 256
>
>int
>main (void)
>{
>    Display *dpy;
>    int screen;
>    Visual *visual;
>    int depth;
>    Window window, root;
>    GC gc;
>    unsigned long valuemask;
>    XGCValues gcvalues;
>    XImage *image;
>    KeyCode quit;
>    uint32_t data;
>    XEvent event;
>    int x, y;
>
>    dpy = XOpenDisplay (0);
>    if (dpy == 0) {
>	fprintf (stderr, "Failed to open display %s\n", XDisplayName (0));
>	exit (1);
>    }
>
>    screen = DefaultScreen (dpy);
>    root = RootWindow (dpy, screen);
>    visual = DefaultVisual (dpy, screen);
>    depth = DefaultDepth (dpy, screen);
>
>    quit = XKeysymToKeycode (dpy, XStringToKeysym ("Q"));
>
>    window = XCreateSimpleWindow (dpy, root, 0, 0, WIDTH, HEIGHT, 0, 0, 0);
>
>    valuemask = 0;
>    gcvalues.function = GXcopy;	valuemask |= GCFunction;
>    gc = XCreateGC (dpy, window, valuemask, &gcvalues);
>
>    image = XCreateImage (dpy, visual, depth, ZPixmap, 0, (char *) &data,
>			  1, 1, 32, 4);
>
>    XSelectInput (dpy, window, KeyPressMask);
>
>    XMapWindow (dpy, window);
>
>    x = 0;
>    y = 0;
>    while (1) {
>	while (XPending (dpy)) {
>	    XNextEvent (dpy, &event);
>	    switch (event.type) {
>	    case KeyPress:
>	    {
>		XKeyEvent *key = &event.xkey;
>		
>		if (key->keycode == quit)
>		    goto DONE;
>	    }
>	    break;
>	    }
>	}
>	XPutPixel (image, 0, 0, rand());
>	XPutImage (dpy, window, gc, image, 0, 0, x, y, 1, 1);
>	x++;
>	if (x >= WIDTH) {
>	    x = 0;
>	    y++;
>	    if (y >= HEIGHT)
>		y = 0;
>	}
>	usleep (10 * 1000);
>    }
>DONE:
>    XFreeGC (dpy, gc);
>    image->data = NULL;
>    XDestroyImage (image);
>    XDestroyWindow (dpy, window);
>    XCloseDisplay (dpy);
>
>    return 0;
>}

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Attachments on bug 16257: 17358 | 19261 | 19360 | 19364

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