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NAME

XorRectRegion: Perform 2d XOR operation of rectangle with region, leaving result in region

SYNOPSIS

status = XorRectRegion(region,rectangle)

d0 a0 a1

BOOL XorRectRegion( struct Region *, struct Rectangle * );

FUNCTION

Add portions of rectangle to region if they are not in the region. Remove portions of rectangle from region if they are in the region.

INPUTS

region: pointer to Region structure
rectangle: pointer to Rectangle structure

RESULT

status: return TRUE if successful operation. Return FALSE if ran out of memory

The region is left unchanged in case of failure.

BUGS

V40 releases and before may have left the region in an inconsistent state in case of failure.

SEE ALSO

OrRegionRegion() AndRegionRegion() graphics/regions.h