On Tue, 17 Jan 2017 17:42:37 +0000 Emmanuel Gil Peyrot <[email protected]> wrote:
> Hi, > > On Tue, Jan 17, 2017 at 05:33:20PM +0200, Pekka Paalanen wrote: > > From: Pekka Paalanen <[email protected]> > > > > To reproduce the problem: > > - start weston (x11 backend worked, glamor in Xwayland makes no > > difference) > > - start xterm > > - very very slowly move the pointer in the xterm decorations onto or > > away from a button > > - the moment the decorations are updated, they will appear incomplete, > > e.g. completely without buttons and title text > > - if you cause just one more pointer motion event, the decorations will > > update to completely drawn appearance > > > > Another way to reproduce the problem is to have an xterm and change its > > window title. This is easy if you use a shell prompt that updates the > > terminal window title. When the title updates, decorations will be > > half-drawn until something happens in XWM. > > > > The fix: flush. > > > > Apparently the drawing commands did not get flushed to the X server > > until any other X11 action pushed them through. > > > > xcb_flush() is the real fix here. cairo_surface_flush() is added just > > for good measure, because documentation indicates it would be better > > used, however it was not strictly necessary to fix the problem in my > > experiments. > > > > Signed-off-by: Pekka Paalanen <[email protected]> > > I tried dolphin-emu which was affected by this problem due to changing > its title to display the current performances of the emulation, and > this fixes it. Thanks! > > Tested-by: Emmanuel Gil Peyrot <[email protected]> > Reviewed-by: Emmanuel Gil Peyrot <[email protected]> Pushed: 6d3887b..db7b9f3 master -> master Thanks, pq
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