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XEmptyRegion, XEqualRegion, XPointInRegion, XRectInRegion - determine if regions are empty or equal
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;
Specifies the region.
Specify the two regions.
Specify the width and height, which define the rectangle.
Specify the x and y coordinates, which define the point or
the coordinates of the upper-left corner of the rectangle.
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.
XCreateRegion(3X11), XIntersectRegion(3X11)
Xlib -- C Language X Interface