XPointInRegion()XPointInRegion()NameXPointInRegion – determine if a point is inside a region.
Synopsis
Bool XPointInRegion(r, x, y)
Region r;
int x, y;
Arguments
r Specifies the region.
x Specify the x and y coordinates of the point relative to the
region's origin.
y
Returns
True if the point is inside the region, else False.
DescriptionXPointInRegion() returns True if the point x, y is contained in the
region r. A point exactly on the boundary of the region is considered
inside the region.
Regions are located using an offset from a point (the region origin)
which is common to all regions. It is up to the application to inter‐
pret the location of the region relative to a drawable.
For more information on regions, see Volume One, Chapter 6, Drawing
Graphics and Text.
Structures
Region is a pointer to an opaque structure type.
See AlsoXClipBox(), XCreateRegion(), XDestroyRegion(), XEmptyRegion(), XEqual‐
Region(), XIntersectRegion(), XOffsetRegion(), XPolygonRegion(), XRect‐
InRegion(), XSetRegion(), XShrinkRegion(), XSubtractRegion(), XUnion‐
RectWithRegion(), XUnionRegion(), XXorRegion().
Xlib - Regions XPointInRegion()