Re: Blit Wanted

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Article #3652

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#3652

From: Dale Luck - Amiga
Date: Tue, 29 May 1990 17:53

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>In article phi@goanna.cs.rmit.oz.au (Philip Hingston) writes:
>>I need a blit where the source overrides the destination except where the
>>source has colour 0, when the destination show through. Is there a blit for
>>this or must I make my own? Thanks.		phi

After constructing the 1 bitplane mask in a separate bitmap via
blitter logical functions joining the planes together you can use
BltPattern to do the rest.

This is how the FloodFill routines in the amiga work.

Dale

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References: <3074@goanna.cs.rmit.oz.au> <1113@tardis.Tymnet.COM>

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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!brutus.cs.uiuc.edu!apple!oliveb!amiga!cbmvax!dale
From: dale@cbmvax.commodore.com (Dale Luck - Amiga)
Newsgroups: comp.sys.amiga.tech
Subject: Re: Blit Wanted
Message-ID: <11909@cbmvax.commodore.com>
Date: 29 May 90 17:53:56 GMT
References: <3074@goanna.cs.rmit.oz.au> <1113@tardis.Tymnet.COM>
Reply-To: dale@cbmvax (Dale Luck - Amiga)
Organization: Commodore, West Chester, PA
Lines: 12

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