NAME

       notcurses-info - Display information about the terminal environment

SYNOPSIS

       notcurses-info [-v]

DESCRIPTION

       notcurses-info prints all the information it knows about the current terminal environment,
       including material loaded from terminfo(5)  (based  on  the  TERM  environment  variable),
       replies from the terminal in response to our queries, and built-in heuristics.

       The  Unicode  half  block,  quadrant,  sextant, and Braille glyphs are all included in the
       output.  If their appearance is irregular, it might behoove you to choose another font.

       The first five lines (the Notcurses initialization banner; see notcurses_init(3)) provide:

       • The Notcurses version and the derived terminal name,  possibly  including  the  terminal
         version.   If  Notcurses  was  able  to  unambiguously query the connected terminal, the
         internal name for the terminal will be shown.  Otherwise, the terminal described by  the
         TERM  environment variable will be displayed.  The terminal version is only acquired via
         query.

       • The current cell geometry, cell-pixel geometry, and the derived window  pixel  geometry,
         the  size of the crender structure, the number of colors in the palette, and whether RGB
         TrueColor is supported.

       • The compiler name and version used to build Notcurses, the size of the nccell structure,
         and  the  endianness  with which Notcurses was compiled.  This buildtime endianness must
         match the runtime endianness.

       • The version of libterminfo against which Notcurses was compiled.

       • The version and name of the multimedia backend.

       The next five lines describe properties of the terminal environment:

       • The first line indicates that a given capability is present with a plus sign  ('+'),  or
         not present/detected with a minus sign ('-'):

         • af: Foreground color can be set

         • ab: Background color can be set

         • sum: Synchronized Update Mode is supported

         • vpa: Cursor can be moved to an absolute vertical coordinate

         • hpa: Cursor can be moved to an absolute horizontal coordinate

         • sgr0: Styling can be reset via a single escape

         • op: Colors can be reset via a single escape

         • fgop: Foreground can be reset via a single escape

         • bgop: Background can be reset via a single escape

         • bce: The back-color-erase property is in play

         • rect: Rectangular editing is available

       • The second line is more of the same:

         • bold: Boldface is available

         • ital: Italics are available

         • struck: Strikethrough is available

         • ucurl: Curled underlines are available

         • uline: Straight underlines are available

         • u7: Cursor position reporting

         • ccc: Palette can be reprogrammed

         • rgb: Colors can be specified as RGB wit eight bits/channel

         • el: Clearing can be performed through the end of the line

       • The third line also covers UTF8 and decoding capabilities:

         • utf8: This is a UTF8 environment

         • 2x1: Upper- and lower-half blocks are available

         • 2x2: Quadrant blocks are available

         • 3x2: Sextant blocks are available

         • 4x2: Braille characters are available

         • img: Images can be decoded

         • vid: Video can be decoded

         • indn: Multiple-line scrolling is available

         • gpm: Connection is established to the GPM server

         • kbd: The Kitty keyboard protocol is in use

       • The  fourth  line  indicates  the  default  background  color, and whether that color is
         treated as transparent by the terminal (only kitty is known to do this), and the default
         foreground color.  pmouse indicates whether pixel-precise mouse events are supported.

       • The  fifth  line  describes the available bitmap graphics.  If Sixels are available, the
         maximum number of color registers and maximum Sixel geometry  are  reported.   If  Linux
         framebuffer graphics are available, that is reported.  If the Kitty graphics protocol is
         detected, that will be reported with "rgba graphics are available"; if Kitty's animation
         support is also present, that will be reported with "rgba pixel animation support".

       To the right of this material is the Notcurses homepage's URI, and the Notcurses logo (the
       latter only if bitmap graphics are available).

       The final eleven lines, only printed when in a UTF8 locale, show various  Unicode  glyphs.
       The  first four lines include the quadrant, sextant, and box-drawing characters.  The next
       four lines include the entire Braille set.  The following two lines include  many  of  the
       Symbols  for  Legacy  Computing  introduced  in  Unicode 13.  The final line includes many
       emoji.

OPTIONS

       -v: Be verbose.

NOTES

       The behavior of notcurses-info (and indeed all of Notcurses) depends on the TERM and  LANG
       environment  variables,  the  installed  POSIX  locales,  and  the  installed  terminfo(5)
       databases.

SEE ALSO

       tack(1), notcurses(3), terminfo(5)

AUTHORS

       nick black <nickblack@linux.com>.

                                              v3.0.7                            notcurses-info(1)