Vivivi: Created page.

2024-08-28T21:07:14Z

Created page.

New page

{{FormatInfo
| subcat = Graphics
| extensions = {{Noext}}
| compression = lossless
| magic = <code>0x</code>
| spec = http://p9f.org/magic/man2html/6/face
| spec availability= free
| developed by = Bell Labs
| released = 1985
}}
The ikon image format was created in 1985 by Bell Labs for use in the <code>vismon</code> program.<ref>Pike, R.; Presotto, D. L. (1985). [https://archive.org/details/1985-proceedings-summer-portland/page/81 "Face the Nation"]. ''Summer Conference Proceedings, Portland 1985''. USENIX Association, pp. 81–86.</ref> It was in use since at least 1985-02.<ref>AT&T Bell Laboratories (1985-02). [https://archive.org/details/unixtimesharingsystemprogrammersmanualeighthedition/page/n667 "Sysmon(9.1)"] ''Unix Time Sharing System: Programmer's Manual, Eighth Edition, Volume 1''.</ref>

The format is readable as ASCII plaintext. It consists of comma-separated big-endian hexadecimal words each prefixed with <code>0x</code>. In the words' binary representation, either every bit or every 2 bits represents a pixel. ''Plan 9 from Bell Labs'' uses a bit depth of two when the 11th (one-indexed) character is an ASCII comma, with a bit depth of one otherwise.<ref><code>readface()</code> in [http://9p.io/sources/plan9/sys/src/cmd/faces/facedb.c <code>/sys/src/cmd/faces/facedb.c</code> of ''Plan 9 from Bell Labs'']</ref> Each pixel is black when all ones, and white when all zeros. Newline characters are significant; each line represents a row of pixels in the image (resulting in constraints on the image's width). Rows go from top to bottom and the pixels within the rows go from left to right.

== Software ==

* [http://p9f.org/ Plan 9 from Bell Labs]
* compface (see [[X-Face#Software]])

== References ==
<references/>

Ikon - Revision history

Vivivi: Created page.