XPolygonRegion - Man Page

Region XPolygonRegion(XPoint points[], int n, int fill_rule);

int XClipBox(Region r, XRectangle *rect_return);

fill_rule

Specifies the fill-rule you want to set for the specified GC. You can pass EvenOddRule or WindingRule.

n

Specifies the number of points in the polygon.

points

Specifies an array of points.

r

Specifies the region.

rect_return

Returns the smallest enclosing rectangle.

The XPolygonRegion function returns a region for the polygon defined by the points array. For an explanation of fill_rule, see XCreateGC.

The XClipBox function returns the smallest rectangle enclosing the specified region.

XCreateGC(3), XDrawPoint(3), XDrawRectangle(3)
Xlib - C Language X Interface

The man page XClipBox(3) is an alias of XPolygonRegion(3).