background-actor: Do not copy empty clip/unobscured regions
Clip and unobscured regions stricly shrink during culling. If they are already empty, simply reference the empty region to reduce allocations. https://gitlab.gnome.org/GNOME/mutter/merge_requests/1082
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@ -193,7 +193,12 @@ set_clip_region (MetaBackgroundActor *self,
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{
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g_clear_pointer (&self->clip_region, cairo_region_destroy);
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if (clip_region)
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self->clip_region = cairo_region_copy (clip_region);
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{
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if (cairo_region_is_empty (clip_region))
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self->clip_region = cairo_region_reference (clip_region);
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else
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self->clip_region = cairo_region_copy (clip_region);
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}
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}
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static void
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@ -202,7 +207,12 @@ set_unobscured_region (MetaBackgroundActor *self,
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{
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g_clear_pointer (&self->unobscured_region, cairo_region_destroy);
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if (unobscured_region)
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self->unobscured_region = cairo_region_copy (unobscured_region);
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{
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if (cairo_region_is_empty (unobscured_region))
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self->unobscured_region = cairo_region_reference (unobscured_region);
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else
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self->unobscured_region = cairo_region_copy (unobscured_region);
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}
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}
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static void
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