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compositor: map overlay window before redirecting windows

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When windows get redirected off screen, all that gets left behind
is black. We don't want to flicker black at startup, though.

This commit maps the overlay window early, before redirecting
toplevels, so they end up getting snapshotted onto the background
pixmap of the overlay window when the overlay window is mapped.

https://bugzilla.gnome.org/show_bug.cgi?id=694321
This commit is contained in:
Ray Strode 2013-03-01 14:41:11 -05:00
parent 160150d127
commit e15bc37225
1 changed files with 31 additions and 16 deletions
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47
src/compositor/compositor.c
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@ -464,23 +464,16 @@ after_stage_paint (gpointer data)
return TRUE;
}
void
meta_compositor_manage_screen (MetaCompositor *compositor,
MetaScreen *screen)
static void
redirect_windows (MetaCompositor *compositor,
MetaScreen *screen)
{
MetaCompScreen *info;
MetaDisplay *display = meta_screen_get_display (screen);
Display *xdisplay = meta_display_get_xdisplay (display);
int screen_number = meta_screen_get_screen_number (screen);
Window xroot = meta_screen_get_xroot (screen);
Window xwin;
gint width, height;
guint n_retries;
guint max_retries;
/* Check if the screen is already managed */
if (meta_screen_get_compositor_data (screen))
return;
MetaDisplay *display = meta_screen_get_display (screen);
Display *xdisplay = meta_display_get_xdisplay (display);
Window xroot = meta_screen_get_xroot (screen);
int screen_number = meta_screen_get_screen_number (screen);
guint n_retries;
guint max_retries;
if (meta_get_replace_current_wm ())
max_retries = 5;
@ -513,6 +506,21 @@ meta_compositor_manage_screen (MetaCompositor *compositor,
n_retries++;
g_usleep (G_USEC_PER_SEC);
}
}
void
meta_compositor_manage_screen (MetaCompositor *compositor,
MetaScreen *screen)
{
MetaCompScreen *info;
MetaDisplay *display = meta_screen_get_display (screen);
Display *xdisplay = meta_display_get_xdisplay (display);
Window xwin;
gint width, height;
/* Check if the screen is already managed */
if (meta_screen_get_compositor_data (screen))
return;
info = g_new0 (MetaCompScreen, 1);
/*
@ -611,6 +619,13 @@ meta_compositor_manage_screen (MetaCompositor *compositor,
}
clutter_actor_show (info->overlay_group);
/* Map overlay window before redirecting windows offscreen so we catch their
* contents until we show the stage.
*/
XMapWindow (xdisplay, info->output);
redirect_windows (compositor, screen);
}
void