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compositor: Use redraw clip region to cull out children

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This will avoid repainting too much of the background if the
bounding box turned out to be too large.

https://bugzilla.gnome.org/show_bug.cgi?id=782344
This commit is contained in:
Carlos Garnacho 2019-07-20 18:33:11 +02:00 committed by Georges Basile Stavracas Neto
parent 8598b654ba
commit e44bd2edb4
1 changed files with 2 additions and 5 deletions
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7
src/compositor/meta-window-group.c
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@ -56,7 +56,7 @@ meta_window_group_paint (ClutterActor *actor)
{ {
cairo_region_t *clip_region; cairo_region_t *clip_region;
cairo_region_t *unobscured_region; cairo_region_t *unobscured_region;
cairo_rectangle_int_t visible_rect, clip_rect; cairo_rectangle_int_t visible_rect;
int paint_x_origin, paint_y_origin; int paint_x_origin, paint_y_origin;
int screen_width, screen_height; int screen_width, screen_height;
@ -112,10 +112,7 @@ meta_window_group_paint (ClutterActor *actor)
* sizes, we could intersect this with an accurate union of the * sizes, we could intersect this with an accurate union of the
* monitors to avoid painting shadows that are visible only in the * monitors to avoid painting shadows that are visible only in the
* holes. */ * holes. */
clutter_stage_get_redraw_clip_bounds (CLUTTER_STAGE (stage), clip_region = clutter_stage_get_redraw_clip (CLUTTER_STAGE (stage));
&clip_rect);
clip_region = cairo_region_create_rectangle (&clip_rect);
cairo_region_translate (clip_region, -paint_x_origin, -paint_y_origin); cairo_region_translate (clip_region, -paint_x_origin, -paint_y_origin);