home *** CD-ROM | disk | FTP | other *** search
- WhirlGIF 2.01
-
- whirlgif is a quick program that reads a series of GIF files, and produces
- a single gif file composed of those images.
-
- Usage:
- whirlgif [-v] [-trans index ] [-time delay] [-o outfile]
- [-loop] [-i incfile] file1 [ -time delay] file2
-
- options:
- -v verbose mode
- -loop [count] add the Netscape 'loop' extension.
- -time delay inter-frame timing.
- -disp [method] Set disposal method, see below
- -trans index set the colormap index 'index' to be transparent
- -o outfile write the results to 'outfile'
- -i incfile read a list of names from 'incfile'
-
- TIPS
-
- If you don't specify an output file, the GIF will be sent to stdout. This is
- a good thing if you're using this in a CGI script, a very bad thing if you
- run this from a terminal and forget to redirect stdout.
-
- The output file (if any) and -loop _MUST_ be specified before any gif images.
-
- You can specify several delay statements on the command line to change
- the delay between images in the middle of an animation, e.g.
-
- whirlgif -time 5 a.gif b.gif c.gif -time 100 d.gif -time 5 e.gif f.gif
-
- Although it's generally considered to be evil, you can also specify
- several transparency statements on the command line, to change the transparent
- color in the middle of an animation. This may cause problems for some programs.
-
- DISPOSAL METHODS
- The disposal method determines how the program displaying the image should
- treat the image after it's displayed, before writing the next image.
-
- There are currently four possible options:
-
- none No disposal specified. The default.
- not Do not dispose. The next image will overlay this one.
-
- back Restore to background color. Fill the image's space with
- the previous background color. May cause flicker.
-
- prev Restore to previous, restores the data from the previous frame.
-
-
-
- BUGS
-
- + should be able to specify delay in an 'incfile' list (see next bug).
-
- + Does not handle filenames starting with a - (hypen), except in 'incfile'.
-
- + Needs better documentation.
-
-
- TODO
-
- + Only save colormaps that are different from preceeding ones.
-
- + have an option that compares current image with previous and then
- only save the smallest rectangle that encompasses changes. I need sample
- code- the most efficient algorithms are patented?
-
- + option for luma sorting of colormaps
-
- + define extension block in order to have frame lists.
-
- This program is available from http://www.msg.net/utility/whirlgif/
-
- --------------------------
- Kevin Kadow kadokev@msg.net
-
- Based on 'txtmerge' written by:
- Mark Podlipec podlipec@wellfleet.com
-
-