B44Compressor::compress (const char *inPtr,
			 int inSize,
			 int minY,
			 const char *&outPtr)
{
    return compress (inPtr,
		     inSize,
		     Box2i (V2i (_minX, minY),
			    V2i (_maxX, minY + numScanLines() - 1)),
		     outPtr);
}
B44Compressor::compress (const char *inPtr,
			 int inSize,
			 int minY,
			 const char *&outPtr)
{
    return compress (inPtr,
		     inSize,
		     Box2i (V2i (_minX, minY),
			    V2i (_maxX, minY + numScanLines() - 1)),
		     outPtr);
}