XIntersectRegion 3X11 __xorgversion__ XLIB FUNCTIONS XIntersectRegion XUnionRegion XUnionRectWithRegion XSubtractRegion XXorRegion XOffsetRegion XShrinkRegion region arithmetic int XIntersectRegion ( Region sra , Region srb , Region dr_return ); int XUnionRegion ( Region sra , Region srb , Region dr_return ); int XUnionRectWithRegion ( XRectangle *rectangle , Region src_region , Region dest_region_return ); int XSubtractRegion ( Region sra , Region srb , Region dr_return ); int XXorRegion ( Region sra , Region srb , Region dr_return ); int XOffsetRegion ( Region r , int dx , int dy ); int XShrinkRegion ( Region r , int dx , int dy ); dest_region_return Returns the destination region. dr_return Returns the result of the computation. ds Dy move or shrink dx dy Specify the x and y coordinates, which define the amount you want to \*(Dy the specified region. r Specifies the region. rectangle Specifies the rectangle. sra srb Specify the two regions with which you want to perform the computation. src_region Specifies the source region to be used. The  XIntersectRegion  function computes the intersection of two regions. The  XUnionRegion  function computes the union of two regions. The  XUnionRectWithRegion  function updates the destination region from a union of the specified rectangle and the specified source region. The  XSubtractRegion  function subtracts srb from sra and stores the results in dr_return. The  XXorRegion  function calculates the difference between the union and intersection of two regions. The  XOffsetRegion  function moves the specified region by a specified amount. The  XShrinkRegion  function reduces the specified region by a specified amount. Positive values shrink the size of the region, and negative values expand the region. XCreateRegion(3X11), XDrawRectangle(3X11), XEmptyRegion(3X11) Xlib - C Language X Interface