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From: schwager@cs.uiuc.edu (Michael Schwager)
Newsgroups: comp.sys.amiga.programmer
Subject: tryin' to create a Flood ()....
Summary: maybe I shoulda been a street musician
Keywords: is it just my brain, or am I dead?
Message-ID: <1991Jan23.034804.6498@cs.uiuc.edu>
Date: 23 Jan 91 03:48:04 GMT
References: <1991Jan23.031010.11248@cs.uiuc.edu>
Organization: University of Illinois, Dept. of Comp. Sci., Urbana, IL
Lines: 33

Ok, so now I'm tryin' to do a Flood fill of an area, and that's not working
right.  Dig this:

I've got a BackDrop window that I've put a lovely IFF picture into.
There's a large area of white (pen 1) surrounding x=470, y=79.  I'm trying
to turn that area black (pen 4).  Around the white is background (pen 0).
I have a 

struct Window *ThisWindow;

So I can do this:

SetOPen (ThisWindow->RPort, 0L);
SetAPen (ThisWindow->RPort, 4L);
Flood (ThisWindow->RPort, 0L, 470L, 79L);

However, if I try to do a mode 1 flood, nothing happens!  That is, it
doesn't matter what I do with SetOPen, but when I try:

Flood (ThisWindow->RPort, 1L, 470L, 79L);

forget it!  It stays whiter than white, brighter than bright.  It's enough
to ruin my day.  So, wisened peoples, what's wrong with my brain this time?
Do I need to set aside a TmpRas?  Do I need to change something else in my
RastPort?  Am I even using the correct RastPort?  Like, ought I go to the
Screen's RastPort (aren't they the same?)?  I feel like I'm fishing in the
dark a little here...
Thanks!
-Mike Schwager                             |"Weapons are the tools of fear;
INTERNET:schwager@cs.uiuc.edu              | a decent man will avoid them...
UUCP:{uunet|convex|pur-ee}!uiucdcs!schwager| His enemies are not demons,
BITNET:schwager@mike.cs.uiuc.edu           | but human beings like himself...."
University of Illinois, Dept. of Comp. Sci.|  -Tao Te Ching, chapter 31