Extracted from Pike v7.8 release 866 at 2016-11-06.
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GDK
GDK.Region

Methods
 create()
 destroy()
 equal()
 intersect()
 offset()
 point_in()
 rect_in()
 shrink()
 subtract()
 union()
 xor()
previousGDK.Region()->subtract()
GDK.Region()->xor()next

Method GDK.Region()->union()

Method union

GDK.Region union(GDK.Region victim)

Description

Computes the union of the given rectangle or region and the region. Also available as region | rectangle, region | region, region + region and region + rectangle.