[cairo-bugs] [Bug 12995] Wireshark crashes with BadMatch

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=12995





------- Comment #3 from guy at alum.mit.edu  2007-10-30 19:26 PST -------
Oh, my goodness.

At the end of _cairo_xlib_surface_create_internal(), I added some fprintfs:

    if (foo != NULL) {
        fprintf(foo, "surface %p, dpy %p, drawable 0x%08lx, xrender_format
%p\n",
                surface, surface->dpy, surface->drawable,
surface->xrender_format);
        fclose(foo);
    }

and it printed

  surface 0x69d1af0, dpy 0x480fe00, drawable 0x0020023e, xrender_format
0x48114e0

In _cairo_xlib_surface_ensure_dst_picture(), I added some fprintfs:

    FILE *foo;

    if (!surface->dst_picture) {
        foo = fopen("/tmp/gtklog", "a");
        if (foo != NULL) {
            Window root;
            int x, y;
            unsigned int xwidth, xheight, border_width, depth;

            fprintf(foo, "ensure_dst_picture: surface %p, dpy %p, drawable
0x%08lx, xrender_format %p\n",
                    surface, surface->dpy, surface->drawable,
                    surface->xrender_format);
            if (XGetGeometry(surface->dpy, surface->drawable,
                              &root, &x, &y, &xwidth, &xheight, &border_width,
                              &depth))
                fprintf(foo, "ensure_dst_picture: drawable depth %u\n", depth);
            fprintf(foo, "ensure_dst_picture: surface %p\n", surface);
            if (surface->xrender_format) 
                fprintf(foo, "ensure_dst_picture: xrender_format depth %d\n",
                        surface->xrender_format->depth);
            fclose(foo);
        }
        surface->dst_picture = XRenderCreatePicture (surface->dpy,
                                                     surface->drawable,
                                                     surface->xrender_format,
                                                     0, NULL);
        _cairo_xlib_surface_set_picture_clip_rects (surface);
    } else if (surface->clip_dirty & CAIRO_XLIB_SURFACE_CLIP_DIRTY_PICTURE)
        _cairo_xlib_surface_set_picture_clip_rects (surface);

and it printed

  ensure_dst_picture: surface 0x69d1af0, dpy 0x480fe00, drawable 0x0020023e,
xrender_format 0x48114e0
  ensure_dst_picture: drawable depth 24
  ensure_dst_picture: xrender_format depth 24

In the X server, I put in code to log information when the CreatePicture op
failed, and it printed

   ProcRenderCreatePicture: BadMatch due to pformat(id 0x0000002c, format
0x00020888)->depth (24) != pDrawable(id 0x0020023e)->depth (32)

so I see a bit of a disagreement between Cairo and the X server about the depth
of the drawable.

Am I missing something?


-- 
Configure bugmail: http://bugs.freedesktop.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the QA contact for the bug, or are watching the QA contact.