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[StWidget] Limit gradient redraws to size changes

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When moving a widget with a gradient, its allocation changes
continuously, resulting in constant redraws.
Checking for actual size changes before the operation avoids
unnecessary redraws.

https://bugzilla.gnome.org/show_bug.cgi?id=608715
This commit is contained in:
Florian Müllner 2010-02-01 22:22:23 +01:00
parent e6902a1f1c
commit 3e19f41cba
1 changed files with 18 additions and 9 deletions
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21
src/st/st-widget.c
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@ -321,19 +321,28 @@ st_widget_allocate (ClutterActor *actor,
}
else if (priv->bg_gradient_type != ST_GRADIENT_NONE)
{
float width, height;
guint width, old_width,
height, old_height;
ClutterActorBox frame_box;
width = box->x2 - box->x1;
height = box->y2 - box->y1;
frame_box.x1 = frame_box.y1 = 0;
frame_box.x2 = width;
frame_box.y2 = height;
frame_box.x2 = box->x2 - box->x1;
frame_box.y2 = box->y2 - box->y1;
width = (guint)(0.5 + frame_box.x2);
height = (guint)(0.5 + frame_box.y2);
clutter_cairo_texture_get_surface_size (CLUTTER_CAIRO_TEXTURE (priv->border_image),
&old_width, &old_height);
if (width > 0 && height > 0 &&
(old_width != width || old_height != height))
{
if (width > 0 && height > 0)
clutter_cairo_texture_set_surface_size (CLUTTER_CAIRO_TEXTURE (priv->border_image),
width, height);
st_widget_redraw_gradient ((StWidget*) actor);
}
clutter_actor_allocate (CLUTTER_ACTOR (priv->border_image),
&frame_box,
flags);