XEmptyRegion(3X11) XLIB FUNCTIONS XEmptyRegion(3X11)NAME
XEmptyRegion, XEqualRegion, XPointInRegion, XRectInRegion
- determine if regions are empty or equal
SYNTAX
Bool XEmptyRegion(r)
Region r;
Bool XEqualRegion(r1, r2)
Region r1, r2;
Bool XPointInRegion(r, x, y)
Region r;
int x, y;
int XRectInRegion(r, x, y, width, height)
Region r;
int x, y;
unsigned int width, 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, Rectangle-
Out if the rectangle is entirely out of the specified
region, and RectanglePart if the rectangle is partially in
the specified region.
SEE ALSOXCreateRegion(3X11), XIntersectRegion(3X11)
Xlib - C Language X Interface
X Version 11 Release 6.4 1