int im_flood( im, x, y, ink, dout )
IMAGE *im;
int x, y;
PEL *ink;
Rect *dout;
int im_flood_blob( im, x, y, ink, dout )
IMAGE *im;
int x, y;
PEL *ink;
Rect *dout;
DESCRIPTION
im_flood()
fills an enclosed area from a starting point, painting ink into 4-way
connected pels whose colour is not equal to ink.
im_flood_blob()
floods with the ink colour, finding pels 4-way connected to the start pel
which are the same colour as the start pel. It is useful for changing the
colour of a blob of pels which all have the same value.
RETURN VALUE
All functions return 0 on success and -1 on error.