Landon Curt Noll
f29b37e49a
Prepare for the winners of **IOCCC28**. > However these are not the 2024 droids you are looking for. :-) The HTML menu (both JavaScript and non-JavaScript) has been updated. The `Status -> Rules and guidelines' have been replaced with two separate menus `Status -> IOCCC rules` and `Status -> IOCCC guidelines`. Added a new top level `social.html` page: built from a new `social.md`. Sorted rules for building specific web pages in the top level `Makefile`. Added `make social` to make the `social.html` page from `social.md`. The `bin/gen-top-html.sh` now is able to process a argument of **social** to process the new top level `social.html` page. Changed `bin/gen-top-html.sh` VERSION from "2.0.0 2025-03-13" to "2.0.1 2025-07-25". Below `About -> Home page` a new `About -> IOCCC social media` menu item as added. Because the menu change touched every HTML file, we changed the general copyright date range for HTML files from "1984-2024" to "1984-2025" due to the extensive changes made for **IOCCC28**. Those markdown files that were modified in 2025 had their copyright date range also changed from "1984-2024" to "1984-2025". Rebuilt tarballs and sitemap due to the extensive HTML rebuilding. Ran `make update` to perform the above.
To build:
make
To use:
./prog < textfile > output.gif
Try:
To see the input files and feed them to the program, redirecting to GIF files:
./try.sh
Judges' remarks:
To get the best experience, use a GIF viewer that can handle animated GIFs.
With macOS you can use Safari using open -a Safari smily.gif.
Some things to consider are that this 2.5KiB gem encodes a 96 character 8x8 font (naively this could already take 6144 bytes) and a GIF encoder. But how does it know which characters are closed?
You should only give this program printable ASCII characters.
Unfortunately this won't run on your PDP8, if you had one, as it needs at least 2MiB of memory to run in.
Author's remarks:
This program generates an animated GIF from a plain text. Run:
cc -o prog prog.c
./prog < invisible.txt > invisible.gif
Open invisible.gif with a GIF viewer that can show animated GIFs and then wait
a minute. You will see a hidden message. Can you tell the difference between
letters that leave the mark and ones that do not?
Other examples:
./prog < golem.txt > golem.gif
./prog < smily.txt > smily.gif
The program itself has a hidden message.
./prog < prog.c > prog.gif