How get an image with a transparent background color

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#7984

From: Randy Young
Date: Thu, 10 Jan 1991 16:26

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Hello:

I am programming a new game for the amiga.  I would like to use the effect that
dpaint uses when they pick up a brush and the background color is transparent.
I want to be able to draw images to the windows without damaging the background
picture.  I have done some work with the Image stuctures to draw to a window,
but it seems that when I cut a square brush and then use it in my program
it erases part of the background.  I am not sure of the technique to use, 
should I use bobs or something like that.  Any help would be welcomed.

Tanks in advance
Randy Young

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Message-ID: <1991Jan10.162634.690@vort.uucp>

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!thunder.mcrcim.mcgill.edu!snorkelwacker.mit.edu!usc!wuarchive!uunet!van-bc!ubc-cs!alberta!cpsc.ucalgary.ca!vort!randy
From: randy@vort.uucp (Randy Young)
Newsgroups: comp.sys.amiga.tech
Subject: How get an image with a transparent background color
Message-ID: <1991Jan10.162634.690@vort.uucp>
Date: 10 Jan 91 16:26:34 GMT
Organization: VORT Computing, Calgary, Canada
Lines: 12