The attached script from [1] may be helpful to reproduce the problem.
Just start the application and resize (enlarge) its window.
I also made a list of possibly related bugs:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=698008
https://bugs.freedesktop.org/show_bug.cgi?id=57534
http://ati.cchtml.com/show_bug.cgi?id=687
http://ati.cchtml.com/show_bug.cgi?id=633
http://ati.cchtml.com/show_bug.cgi?id=567
http://ati.cchtml.com/show_bug.cgi?id=657
https://bugs.launchpad.net/ubuntu/+source/fglrx-installer/+bug/1151242
I'm not sure where would be the best place to forward this test
case...
[1]: http://xpra.org/trac/ticket/327#comment:10
Thanks.
--
Regards,
Dmitry Smirnov
GPG key : 4096R/53968D1B
---
Odious ideas are not entitled to hide from criticism behind the human
shield of their believers' feelings.
-- Richard Stallman
#!/usr/bin/env python
import gtk
from gtk import gdk
import cairo
import gobject
CRASH = True
class ClientWindow(gtk.Window):
def __init__(self, w, h):
gtk.Window.__init__(self, gtk.WINDOW_TOPLEVEL)
self.set_size_request(w, h)
self.set_app_paintable(True)
self.add_events(gdk.STRUCTURE_MASK)
self._backing = None
self.new_backing(w, h)
def new_backing(self, w, h):
print("new_backing(%s, %s)" % (w, h))
if self._backing is None:
self._backing = Backing()
self._backing.init(w, h)
def do_configure_event(self, event):
print("do_configure_event(%s)" % event)
gtk.Window.do_configure_event(self, event)
_, _, w, h, _ = self.get_window().get_geometry()
self.new_backing(w, h)
class Backing(object):
def __init__(self):
self._backing = None
def init(self, w, h):
old_backing = self._backing
self._backing = gdk.Pixmap(gdk.get_default_root_window(), w, h)
cr = self._backing.cairo_create()
cr.set_source_rgb(1, 1, 1)
if CRASH and old_backing is not None:
cr.set_operator(cairo.OPERATOR_SOURCE)
cr.set_source_pixmap(old_backing, 0, 0)
cr.paint()
old_w, old_h = old_backing.get_size()
if w>old_w:
cr.new_path()
cr.move_to(old_w, 0)
cr.line_to(w, 0)
cr.line_to(w, h)
cr.line_to(old_w, h)
cr.close_path()
cr.fill()
if h>old_h:
cr.new_path()
cr.move_to(0, old_h)
cr.line_to(0, h)
cr.line_to(w, h)
cr.line_to(w, old_h)
cr.close_path()
cr.fill()
else:
cr.rectangle(0, 0, w, h)
cr.fill()
gobject.type_register(ClientWindow)
def main():
window = ClientWindow(400, 200)
window.show()
gtk.main()
if __name__ == "__main__":
main()
