NAME
XEmptyRegion, XEqualRegion, XPointInRegion, XRectInRegion - determine
if regions are empty or equal
SYNTAX
Bool XEmptyRegion(Region r);
Bool XEqualRegion(Region r1, Region r2);
Bool XPointInRegion(Region r, int x, int y);
int XRectInRegion(Region r, int x, int y, unsigned int width, unsigned
int height);
ARGUMENTS
r Specifies the region.
r1
r2 Specify the two regions.
width
height Specify the width and height, which define the rectangle.
x
y Specify the x and y coordinates, which define the point or
the coordinates of the upper-left corner of the rectangle.
DESCRIPTION
The XEmptyRegion function returns True if the region is empty.
The XEqualRegion function returns True if the two regions have the same
offset, size, and shape.
The XPointInRegion function returns True if the point (x, y) is
contained in the region r.
The XRectInRegion function returns RectangleIn if the rectangle is
entirely in the specified region, RectangleOut if the rectangle is
entirely out of the specified region, and RectanglePart if the
rectangle is partially in the specified region.
SEE ALSO
XCreateRegion(3), XIntersectRegion(3)
Xlib - C Language X Interface