Path: utzoo!mnetor!uunet!wucs1!wuphys!lel
From: lel@wuphys.UUCP (Lyle E. Levine)
Newsgroups: comp.sys.amiga
Subject: Re: GIF format
Message-ID: <543@wuphys.UUCP>
Date: 30 Apr 88 02:04:08 GMT
References: <1419@hubcap.UUCP> <8965@agate.BERKELEY.EDU> <2876@s.cc.purdue.edu> <4857@cup.portal.com>
Reply-To: lel@wuphys.UUCP (Lyle E. Levine)
Organization: Physics Dept., Washington U. in St. Louis
Lines: 43

In article <4857@cup.portal.com> doug-merritt@cup.portal.com writes:
>Re: Patricks comments about IFF being better than GIF due to problems
>with different aspect ratios on different machines...
>
>I don't recall IFF having any fields that detail the host's aspect
>ratio (on the Amiga it's about 1:1.15, the Mac is 1:1). Are you
>sure it's there? If it's not, then they both have the same problem.
>
>      Doug Merritt        ucbvax!sun.com!cup.portal.com!doug-merritt
>                      or  ucbvax!eris!doug (doug@eris.berkeley.edu)
>                      or  ucbvax!unisoft!certes!doug

I think this belongs in .tech but oh well...

typedef struct {
	UWORD w, h;
	.
	.
	.
	.
	.
	.
	UBYTE xAspect, yAspect; /*pixel aspect, a ratio width:height*/
	.
	} BitMapHeader;

It's there all right!

The actual ratio depends upon the resolution.  A typical ratio
for 320x200 should be 10:11.

Sorry for posting this here but I felt it should be followed up in the
same group it started in.  


==========
IBM is a Division of Sirius Cybernetics Corporation
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