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clutter: Avoid rounding compensation when invalidating 2D actors

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This allows the redraw clip to be more constrained, so MetaCullable doesn't
end up rendering portions of window shadows, frame and background when a
window invalidates (part of) its contents.

https://bugzilla.gnome.org/show_bug.cgi?id=782344
This commit is contained in:
Carlos Garnacho 2017-05-05 14:15:30 +02:00
parent 9f3d321bf2
commit a7df459416
1 changed files with 15 additions and 0 deletions
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15
clutter/clutter/clutter-paint-volume.c
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@ -1164,6 +1164,21 @@ _clutter_paint_volume_get_stage_paint_box (ClutterPaintVolume *pv,
_clutter_paint_volume_get_bounding_box (&projected_pv, box);
if (pv->is_2d && pv->actor &&
clutter_actor_get_z_position (pv->actor) == 0)
{
/* If the volume/actor are perfectly 2D, take the bounding box as
* good. We won't need to add any extra room for sub-pixel positioning
* in this case.
*/
clutter_paint_volume_free (&projected_pv);
box->x1 = CLUTTER_NEARBYINT (box->x1);
box->y1 = CLUTTER_NEARBYINT (box->y1);
box->x2 = CLUTTER_NEARBYINT (box->x2);
box->y2 = CLUTTER_NEARBYINT (box->y2);
return;
}
/* The aim here is that for a given rectangle defined with floating point
* coordinates we want to determine a stable quantized size in pixels
* that doesn't vary due to the original box's sub-pixel position.