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  • VT220 sixel/soft-font character sets

    From Neil Breeden@21:1/5 to All on Thu Apr 15 11:40:08 2021
    I see a lot of old posts on this but nothing that helps so here goes:

    We're working to add VT220 sixel/soft-font (DECDLD and DRCS) support to a terminal emulator. Doe's anyone know of any downloadable soft-fonts? I've found a few for the VT3xx however the character size is different, these are not VT220 compatible.
    Thanks!
    -Neil

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  • From Grant Taylor@21:1/5 to Neil Breeden on Thu Apr 15 14:46:35 2021
    On 4/15/21 12:40 PM, Neil Breeden wrote:
    We're working to add VT220 sixel/soft-font (DECDLD and DRCS)
    support to a terminal emulator. Doe's anyone know of any downloadable soft-fonts? I've found a few for the VT3xx however the character size
    is different, these are not VT220 compatible.

    I have no idea about the soft-font(s).

    But I'd be surprised to learn that there is a font per se for Sixel
    graphics.

    The testing that I've done with Sixel has caused me to think that it is
    quite literally a series of one pixel wide by eight (?) pixel tall representations. Multiple bytes result in multiple columns. Combine
    enough bytes to make a row eight (?) pixels tall. Combine enough rows
    to make a picture.

    So ... I don't see what I would consider to be a font in there.

    Aside: I'd like to learn more about your terminal emulator.



    --
    Grant. . . .
    unix || die

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  • From Lars Brinkhoff@21:1/5 to Neil Breeden on Fri Apr 16 04:55:58 2021
    Neil Breeden <nbreeden2@gmail.com> writes:
    Doe's anyone know of any downloadable soft-fonts?

    Some of the .txt files here download a softfont and then prints the
    characters to arrange a picture on the display. This was run on a
    real VT220.

    https://github.com/larsbrinkhoff/sixel

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  • From Neil Breeden@21:1/5 to All on Fri Apr 16 07:28:21 2021
    The standalone terminal emulator can be seen at https://thehighnibble.com/vt132/#vt132-stand-alone-edition
    A couple videos here https://www.youtube.com/playlist?list=PLAvOjNk-JGgUszsM_SxiIVGBrUqJLO5t5

    There is also a RC2014 version https://thehighnibble.com/vt132/#overview
    A longer video series showing the assembly of this version starts at https://youtu.be/r-bFykByeJ8

    -Neil

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  • From Lars Brinkhoff@21:1/5 to Grant Taylor on Fri Apr 16 18:33:21 2021
    Grant Taylor wrote:
    I have no idea about the soft-font(s). The testing that I've done
    with Sixel has caused me to think that it is quite literally a series
    of one pixel wide by eight (?) pixel tall representations.

    Six pixels, hence "sixel". This format was used with the VT220 for transferring soft fonts. Later graphic capable terminals like the VT340
    can also send sixel data straight to the display as you describe.

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  • From Lars Brinkhoff@21:1/5 to All on Sat Apr 17 12:02:32 2021
    I believe there used to be a Cyrillic VT220 soft font here:

    http://web.archive.org/web/20111126220552/http://npj.netangels.ru/shattered/inventory/fonts

    Maybe this vt_fonts.zip is a copy:

    https://zx-pk.ru/misc.php?do=showattachments&t=10718

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