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window-actor: Don't create a mask texture unnecessarily

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Mask texture resources may be expensive. Don't create one
if we don't need to, like on an unshaped window without
a frame.

https://bugzilla.gnome.org/show_bug.cgi?id=681676
This commit is contained in:
Jasper St. Pierre 2012-08-12 18:02:06 -03:00
parent 165e117028
commit 7938458eb8
1 changed files with 12 additions and 6 deletions
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8
src/compositor/meta-window-actor.c
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@ -2219,6 +2219,7 @@ check_needs_reshape (MetaWindowActor *self)
MetaFrameBorders borders; MetaFrameBorders borders;
cairo_region_t *region = NULL; cairo_region_t *region = NULL;
cairo_rectangle_int_t client_area; cairo_rectangle_int_t client_area;
gboolean needs_mask;
if (!priv->needs_reshape) if (!priv->needs_reshape)
return; return;
@ -2270,6 +2271,8 @@ check_needs_reshape (MetaWindowActor *self)
} }
#endif #endif
needs_mask = (region != NULL) || (priv->window->frame != NULL);
if (region == NULL) if (region == NULL)
{ {
/* If we don't have a shape on the server, that means that /* If we don't have a shape on the server, that means that
@ -2278,13 +2281,16 @@ check_needs_reshape (MetaWindowActor *self)
region = cairo_region_create_rectangle (&client_area); region = cairo_region_create_rectangle (&client_area);
} }
if (needs_mask)
{
/* This takes the region, generates a mask using GTK+ /* This takes the region, generates a mask using GTK+
* and scans the mask looking for all opaque pixels, * and scans the mask looking for all opaque pixels,
* adding it to region. * adding it to region.
*/ */
build_and_scan_frame_mask (self, &borders, &client_area, region); build_and_scan_frame_mask (self, &borders, &client_area, region);
meta_window_actor_update_shape_region (self, region); }
meta_window_actor_update_shape_region (self, region);
cairo_region_destroy (region); cairo_region_destroy (region);
priv->needs_reshape = FALSE; priv->needs_reshape = FALSE;