From a7df459416dc46321204c98197e4fd84724976e0 Mon Sep 17 00:00:00 2001 From: Carlos Garnacho Date: Fri, 5 May 2017 14:15:30 +0200 Subject: [PATCH] clutter: Avoid rounding compensation when invalidating 2D actors 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 --- clutter/clutter/clutter-paint-volume.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/clutter/clutter/clutter-paint-volume.c b/clutter/clutter/clutter-paint-volume.c index 787fabea2..c0deaebf3 100644 --- a/clutter/clutter/clutter-paint-volume.c +++ b/clutter/clutter/clutter-paint-volume.c @@ -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.