XIntersectRegion, XUnionRegion, XUnionRectWithRegion, XSubtractRegion, XXorRegion, XOffsetRegion, XShrinkRegion - region arithmetic
SYNTAX
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);
ARGUMENTS
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 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.
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.
