From: ao950 AT FreeNet DOT Carleton DOT CA (Paul Derbyshire)
Newsgroups: comp.os.msdos.djgpp
Subject: Re: off topics Poscript question
Date: 14 Jan 1998 11:14:03 GMT
Organization: The National Capital FreeNet
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Message-ID: <69i6lr$8pe@freenet-news.carleton.ca>
References: <199801131211 DOT NAA01591 AT pimprenelle DOT lps DOT ens DOT fr>
Reply-To: ao950 AT FreeNet DOT Carleton DOT CA (Paul Derbyshire)
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To: djgpp AT delorie DOT com
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Vincent Croquette (vincent AT lps DOT ens DOT fr) writes:
> 	Does anyone know how to make one color in a 
> 	bitmat image become transparent for was is behind

In Allegro:
  In 8 bit modes:
    Use color 0, and use a method of blitting or whatever that does
    transparency (i.e., draw_sprite instead of blit).
  In other modes:
    Use the color red 255, green 0, blue 255, otherwise the same method.
In GRX:
  I haven't the foggiest.

--
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Paul Derbyshire ao950 AT freenet DOT carleton DOT ca pgd73 AT hotmail DOT com