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X-Face - Just Solve the File Format Problem

X-Face

From Just Solve the File Format Problem
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(Compface intermediate format: Directs to the Ikon format page.)
(Software: Added x-face-el)
 
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|extensions={{ext|face}}, {{ext|xface}}
 
|extensions={{ext|face}}, {{ext|xface}}
 
|released=~1990
 
|released=~1990
 +
| spec = https://purl.org/x-face-spec
 
}}
 
}}
 
'''X-Face''' is a compressed image format that can be placed in an email or Usenet newsgroup message header. It is expected to contain the sender's picture or avatar. It is a 48×48 bi-level image. The format appears to be fairly complex, and probably uses [[arithmetic coding]].
 
'''X-Face''' is a compressed image format that can be placed in an email or Usenet newsgroup message header. It is expected to contain the sender's picture or avatar. It is a 48×48 bi-level image. The format appears to be fairly complex, and probably uses [[arithmetic coding]].
Line 12: Line 13:
 
File extensions '''.face''' and '''.xface''' have both been suggested. Sometimes, X-Face data will be in a file named ".face" in the user's home directory.
 
File extensions '''.face''' and '''.xface''' have both been suggested. Sometimes, X-Face data will be in a file named ".face" in the user's home directory.
  
Most or all X-Face code is based on James Ashton's ''Compface'' software, and Compface's code is fairly opaque. [https://purl.org/x-face/spec A specification] has been written by reverse-engineering Compface.
+
Most or all X-Face code is based on James Ashton's ''Compface'' software, and Compface's code is fairly opaque. [https://purl.org/x-face-spec A specification] has been written by reverse-engineering Compface.
  
 
== Compface intermediate format ==
 
== Compface intermediate format ==
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* {{Deark}}
 
* {{Deark}}
 
* [http://www.dairiki.org/xface/ Online X-Face Converter]
 
* [http://www.dairiki.org/xface/ Online X-Face Converter]
 +
* [https://packages.debian.org/sid/x-face-el x-face-el] — extends the format, in a manner unsupported by other software, adding colour/greyscale pixels, animation, and larger image sizes
  
 
== Samples ==
 
== Samples ==

Latest revision as of 22:27, 28 August 2024

File Format
Name X-Face
Ontology
Extension(s) .face, .xface
Spec https://purl.org/x-face-spec
Released ~1990

X-Face is a compressed image format that can be placed in an email or Usenet newsgroup message header. It is expected to contain the sender's picture or avatar. It is a 48×48 bi-level image. The format appears to be fairly complex, and probably uses arithmetic coding.

Contents

[edit] Discussion

Although X-Face data is often expected to be stored in a file, there isn't really a standard X-Face file format. The main thing to be aware of is that sometimes the "X-Face:" header name is stored in the file, and sometimes it is not. Different software has different requirements.

File extensions .face and .xface have both been suggested. Sometimes, X-Face data will be in a file named ".face" in the user's home directory.

Most or all X-Face code is based on James Ashton's Compface software, and Compface's code is fairly opaque. A specification has been written by reverse-engineering Compface.

[edit] Compface intermediate format

The Compface software by default converts X-Face to and from the Ikon format. It only supports 48×48 images with a bit depth of 1. Most implementations use 16-bit words but one implementation[1] uses 8-bit words.

[edit] Software

[edit] Samples

[edit] Links

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