z/OS Communications Server: IP Programmer's Guide and Reference
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X Window System routines: Manipulating regions

z/OS Communications Server: IP Programmer's Guide and Reference
SC27-3659-02

Table 1 provides the routines for manipulating regions.

Table 1. Manipulating regions
Routine Description
XClipBox() Generates the smallest enclosing rectangle in the region.
XCreateRegion() Creates a new empty region.
XEmptyRegion() Determines whether a specified region is empty.
XEqualRegion() Determines whether two regions are the same.
XIntersectRegion() Computes the intersection of two regions.
XDestroyRegion() Frees storage associated with the specified region.
XOffsetRegion() Moves the specified region by the specified amount.
XPointInRegion() Determines if a point lies in the specified region.
XPolygonRegion() Generates a region from points.
XRectInRegion() Determines if a rectangle lies in the specified region.
XSetRegion() Sets the GC to the specified region.
XShrinkRegion() Reduces the specified region by a specified amount.
XSubtractRegion() Subtracts two regions.
XUnionRegion() Computes the union of two regions.
XUnionRectWithRegion() Creates a union of source region and rectangle.
XXorRegion() Gets the difference between the union and intersection of regions.

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