NAME
	Flood -- Flood rastport like areafill.

   SYNOPSIS
	error = Flood( rp, mode, x, y)
        d0            a1   d2  d0  d1

	BOOL Flood(struct RastPort *, ULONG, SHORT, SHORT);

   FUNCTION
	Search the BitMap starting at (x,y).
	Fill all adjacent pixels if they are:
	    Mode 0: not the same color as AOLPen
	    Mode 1: the same color as the pixel at (x,y)

	When actually doing the fill use the modes that apply to
	standard areafill routine such as drawmodes and patterns.

   INPUTS
	rp - pointer to RastPort
	(x,y) - coordinate in BitMap to start the flood fill at.
	mode -  0 fill all adjacent pixels searching for border.
		1 fill all adjacent pixels that have same pen number
		as the one at (x,y).

   NOTES
	In order to use Flood, the destination RastPort must
	have a valid TmpRas raster whose size is as large as
	that of the RastPort.

   SEE ALSO
	AreaEnd() InitTmpRas() graphics/rastport.h

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