Version  —  11

NAME

XIntersectRegion, XUnionRegion, XUnionRectWithRegion, XSubtractRegion, XXorRegion, XOffsetRegion, XShrinkRegion − region arthmetic

SYNOPSIS

XIntersectRegion(sra, srb, dr_return)
   Region sra, srb, dr_return;

XUnionRegion(sra, srb, dr_return)
   Region sra, srb, dr_return;

XUnionRectWithRegion(rectangle, src_region, dest_region_return)
   XRectangle ∗rectangle;
   Region src_region;
   Region dest_region_return;

XSubtractRegion(sra, srb, dr_return)
   Region sra, srb, dr_return;

XXorRegion(sra, srb, dr_return)
   Region sra, srb, dr_return;

XOffsetRegion(r, dx, dy)
   Region r;
   int dx, dy;

XShrinkRegion(r, dx, dy)
   Region r;
   int dx, dy;

PARAMETERS

dest_region_return
Returns the destination region.

dr_returnReturns the result of the computation.  ds Dy move or shrink

dx

dySpecify the x and y coordinates, which define the amount you want to  the specified region. 

rSpecifies the region. 

rectangleSpecifies the rectangle. 

sra

srbSpecify the two regions with which you want to perform the computation. 

src_regionSpecifies the source region to be used. 

DESCRIPTION

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.

RELATED INFORMATION

XCreateRegion(3X11), XDrawRectangle(3X11), XEmptyRegion(3X11)
Xlib − C Language X Interface