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XPolygonRegion, XClipBox
- generate regions 
- 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(3X11)
, XDrawPoint(3X11)
,
XDrawRectangle(3X11)
 
Xlib - C Language X Interface 
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