NAME

XSubtractRegion — subtract one region from another. 

SYNOPSIS

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

ARGUMENTS

sra

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

dr_returnReturns the result of the computation. 

DESCRIPTION

XSubtractRegion() calculates the difference between the two regions specified (sra − srb) and puts the result in dr_return. 

This function returns a region which contains all parts of sra that are not also in srb. 

For more information on regions, see Volume One, Chapter 6, Drawing Graphics and Text. 

STRUCTURES

Region is a pointer to an opaque structure type. 

SEE ALSO

XClipBox(), XCreateRegion(), XDestroyRegion(), XEmptyRegion(), XEqualRegion(), XIntersectRegion(), XOffsetRegion(), XPointInRegion(), XPolygonRegion(), XRectInRegion(), XSetRegion(), XShrinkRegion(), XUnionRectWithRegion(), XUnionRegion(), XXorRegion(). 

Xlib Reference Manual