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- Newsgroups: comp.graphics
- Subject: Re: Multiple Images within a GIF datastream
- Message-ID: <1993Jan25.155400.1@ualr.edu>
- From: djlewis@ualr.edu
- Date: 25 Jan 93 15:54:00 GMT
- References: <710@esun179.gdc.com> <1846@cogsci.ucsd.EDU>
- Organization: University of Arkansas at Little Rock
- Nntp-Posting-Host: spider.ualr.edu
- Lines: 39
-
- In article <1846@cogsci.ucsd.EDU>, hartung@crl.ucsd.edu (Jeffrey P. Hartung) writes:
- > In article <710@esun179.gdc.com> haggerty@gdc.com writes:
- >>
- >> I'm writing a program which takes two GIF files and concatinates them into
- >>one GIF file with multiple images. According to the GIF format specification,
- >>a GIF datastream can contain more than one image....
- >
- > [stuff deleted]
- >
- >>However, the decoders I am using to display the GIF file, do not seem to
- >>support multiple images in a GIF data stream. I have browsed the code of
- >>these programs and they ignore whatever follows the first image.
- >>Can anyone tell me if multiple images within a single GIF datastream
- >>is supported? I am not experienced in Graphics... Am I missing something?
- >
- > Your understanding of the format is correct, but it is also the case that few
- > GIF viewers / decoders actually handle multiple images. There used to be a
- > Turbo C library (with source code) called something like GIFLIB on
- > wsmr-simtel20.army.mil in the PD1:<MSDOS.GIF> directory. Look for a file
- > called GIFLIB12.ZIP. However, as I recall, it supported Hercules graphics
- > adaptors only, os you'll have to adapt the code to your hardware. I also
- > recall that it was pretty slow code, but you might want to look at it to see
- > how multiple images are handled, then apply the information to your own code.
- >
- >
- >
- > --
- > --Jeff Hartung--
- > Disclaimer: My opinions only, etc., etc., BLAH! BLAH! BLAH!...
- > InterNet - hartung@crl.ucsd.edu BITNET - hartung@ucsd
- > UUCP - ucsd!crl.ucsd.edu!hartung
- There is also a program already written that creates one gif of several gifs
- for easier location. it just reduces the size of each gif and taggs a filename
- to them and stores them in row coloumn form in the rows/col of your choice.
- I believe it is GIFVIEW.ZIP
-
- Don Lewis
- <djlewis@ualr.edu>
-
-