I was looking into TrueColor support for Terminology. It won’t support it fully but it does approximate those TrueColors to a palette of 256 colors. It should do it better than XTerm since it is not using a dumb euclidean distance to compute color distance but something a bit more complex: the last formula on the Euclidean chapter on Color Distance on wikipedia.
I looked a bit more on those escape codes defined in ITU T.416 or ISO 8613 and those TrueColors can be defined as RGB
, CMY
and CMYK
. Terminology supports all of them (and might be the only one) but still does color approximation though.
That’s when I stumbled on the Encircled escape sequence.
3 years ago, I added support for the Fraktur escape sequence to terminology. And I just did the same for Encircled characters.
Unicode provides characters that are encircled in the Enclosed Alphanumerics block.
I did the same trick: translate the characters a-z
, A-Z
, 0-9
to their relative enclosed characters.
If you follow the git version, you can try it like that:
echo "\033[52mabcdefghijklmnopqrstuvwxyz\n\033[0m"
echo "\033[52mABCDEFGHIJKLMNOPQRSTUVWXYZ\n\033[0m"
I’m still using PragmataPro, but it only supports p
enclosed. The other characters are rendered using Symbola (this is transparent to the user).
Here’s how it renders for me: