HELP! * GREY=local LOCAL HTML version of Foils prepared 18 March 97

Foil 21 Multiple-Block GIF Files (Animated GIFs)

From Introduction to CGI Programming CPS616 Spring 97 -- Spring Semester 97. by Nancy J. McCracken * See also color IMAGE
The GIF89a specification allows a GIF file to have multiple blocks of data, each with a different image. The images can be set to display one after another or as overlays that partially replace sections of the preceding image. They can be set to have time delays and also to loop.
Multiple-Block GIFs can be created by a program called Construction Set, from Alchemy Mindworks:
  • http://www.north.net/alchemy/alchemy.html

Northeast Parallel Architectures Center, Syracuse University, npac@npac.syr.edu

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Page produced by wwwfoil on Tue Apr 29 1997