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Modify window system exposes wrt outstanding moves

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If there are outstanding moves in an area that intersects
the source of an outstanding move we need to move the invalid
area correspondingly, otherwise we will expose the wrong area
as the outstanding move copy will happen before we expose
the invalid area.
This commit is contained in:
Alexander Larsson 2009-08-13 13:13:47 +02:00
parent a3ee8271a9
commit 8a517dc0bb
2 changed files with 31 additions and 2 deletions
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2
gdk/gdkinternals.h
View File

@ -605,7 +605,7 @@ void _gdk_display_enable_motion_hints (GdkDisplay *display);
void _gdk_window_invalidate_for_expose (GdkWindow *window,
const GdkRegion *region);
GdkRegion *region);
void _gdk_windowing_set_cairo_surface_size (cairo_surface_t *surface,
int width,

31
gdk/gdkwindow.c
View File

@ -5300,8 +5300,37 @@ gdk_window_invalidate_region (GdkWindow *window,
**/
void
_gdk_window_invalidate_for_expose (GdkWindow *window,
const GdkRegion *region)
GdkRegion *region)
{
GdkWindowObject *private = (GdkWindowObject *) window;
GdkWindowRegionMove *move;
GdkRegion *move_region;
GList *l;
/* Any invalidations comming from the windowing system will
be in areas that may be moved by outstanding moves,
so we need to modify the expose region correspondingly,
otherwise we would expose in the wrong place, as the
outstanding moves will be copied before we draw the
exposes. */
for (l = private->outstanding_moves; l != NULL; l = l->next)
{
move = l->data;
/* covert to move source region */
move_region = gdk_region_copy (move->dest_region);
gdk_region_offset (move_region, -move->dx, -move->dy);
/* Move area of region that intersects with move source
by dx, dy of the move*/
gdk_region_intersect (move_region, region);
gdk_region_subtract (region, move_region);
gdk_region_offset (move_region, move->dx, move->dy);
gdk_region_union (region, move_region);
gdk_region_destroy (move_region);
}
gdk_window_invalidate_maybe_recurse (window, region,
(gboolean (*) (GdkWindow *, gpointer))gdk_window_has_no_impl,
NULL);