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From: pfeifer@vax1.acs.udel.EDU (Mark C Pfeifer)
Newsgroups: comp.sys.ibm.pc,comp.binaries.ibm.pc.d
Subject: Re: vgif GIF-viewing program
Summary: GIFs come in different sizes
Message-ID: <1241@udccvax1.acs.udel.EDU>
Date: 11 May 88 15:05:36 GMT
References: <5057@ecsvax.UUCP> <8638@iuvax.cs.indiana.edu>
Reply-To: pfeifer@vax1.acs.udel.EDU (Mark C Pfeifer)
Distribution: na
Organization: University of Delaware
Lines: 24

In article <8638@iuvax.cs.indiana.edu> bobmon@iuvax.UUCP (RAMontante) writes:
>I'm using vgif on a CGA card (Z-158 display, actually).  When I use vigf's
>2-color option, it appears that the lower portion (one-fifth, maybe?) of the
>picture is missing.  That is, the screen is filled, but the picture looks
>like it should extend lower.  AND, when I try the 4-color mode, the picture
>is twice as wide as the screen -- I can see only the left half of (the upper
>part of) the same picture.  Can anyone explain this to me?
[more stuff cutout]

A lot of GIF files are intended for EGA (640*350) displays.  When you tell
VGIF to display the file, it just displays the upper-left hand corner.

You can tell what size the file is by loading VGIF, changing the misc.
options (I think that's what it's called) and telling VGIF to 
display statistics about the pictures before displaying them.

For example, the blastoff.gif file is 640x350 16-color (if I remember right).

The only way I know of to see the rest of the picture is to use a 
computer with a better video system (no scrolling exists in VGIF).

Hope that this helped.

Mark