From:	Damian Yerrick <DONT DOT YOU DOT DAREd_yerrick AT hotmail DOT comSEND DOT SPAM>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Masking (?)
Organization:	Pin Eight Software http://pineight.8m.com/
Message-ID:	<mu1lcsocumg2titnlnfeha1nrbso7578q5@4ax.com>
References:	<8abq7q$p8u$1 AT lure DOT pipex DOT net>
X-Newsreader:	Forte Agent 1.7/32.534
MIME-Version:	1.0
Lines:	24
X-Trace:	/K0ZEBQwAD51xfBAQjg6azJ837I0lUGIIdKR/P0u1vhbI1R7LAEqOKIB3R03Lfgq5oxaNK1kHF2g!yjhPf1ucZaiJMZD86aVNZcn4saSvvQCaYawQgEDhYbj/jPUx8NdBXOgH8zmVqb6QwkfoKO0NlJ8z!5uS1LaM=
X-Complaints-To:	abuse AT gte DOT net
X-Abuse-Info:	Please be sure to forward a copy of ALL headers
X-Abuse-Info:	Otherwise we will be unable to process your complaint properly
NNTP-Posting-Date:	Sat, 11 Mar 2000 17:55:15 GMT
Distribution:	world
Date:	Sat, 11 Mar 2000 17:55:15 GMT
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp
Reply-To:	djgpp AT delorie DOT com

On Fri, 10 Mar 2000 21:44:47 -0000, "DeepBlack \(Murray Evans\)"
<deepblack AT dial DOT pipex DOT com> wrote:

>I have a 24-bit bitmap in a datafile, and want to place it onto the screen.
>There are parts of the bitmap which I would like to not be seen (i.e, be the
>same colour as the background that the bitmap is placed over.) How do I do
>this (with allegro preferrably)?
>the allegro docs talk about masking, which I think is what I want. can that
>be done in software, or soes it have to be a hardware thing?

Simply make the transparent parts hot pink (r=255 g=0 b=255) and use
masked_blit() instead of blit()

For more Allegro help, try the mailing list:
  http://www.talula.demon.co.uk/allegro/maillist.html

-- 
Damian Yerrick  http://yerricde.tripod.com/
Comment on story ideas: http://home1.gte.net/frodo/quickjot.html
AOL is sucks! Find out why: http://anti-aol.org/faqs/aas/
View full sig: http://www.rose-hulman.edu/~yerricde/sig.html

This is McAfee VirusScan. Add these two lines to your .sig to
prevent the spread of .sig viruses.  http://www.mcafee.com/

- Raw text -