XEmptyRegion(XS)  X Version 11 (Release 5) 6 January 1993   XEmptyRegion(XS)


 Name

    XEmptyRegion - 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, 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(XS), XIntersectRegion(XS)
    Xlib - C Language X Interface