+ANSI (VT100, ISO-6429) 16-colour text palette +as implemented by various systems and programs. +<: +print + !exists $get{v} ? 'Also see 8-bit legacy hardware palettes.' : + 'Also included are 8-bit legacy hardware palettes.'; +:> +

+<: +use Shiar_Sheet::Colour '1.03'; +use List::Util qw( min max ); -:> - +my $palettes = do 'termcol.inc.pl'; +die "Cannot open palette data: $_\n" for $@ || $! || (); - -terminal colour cheat sheet - - - +sub colcell { + my $name = shift // return "\n"; + my $col = Shiar_Sheet::Colour->new(@_); + my $minhex = $col->rgb24; + my $css = '#' . $col->rgb48; + my $inverse = '#' . sprintf('%X', $col->luminance/255 < .3 ? 12 : 0) x 3; - -

Terminal colours

+ my $sample = [ qw(#000 #FFF) ]; + ($name, $sample) = @$name if ref $name eq 'ARRAY'; -

%s

', "\n"; - print '', "\n"; - print "\n"; - for my $num (0 .. 15) { - my $rgb = $col{$term}[$num + 2]; - print '', - colcell($term eq 'html' ? $col{-name}[$num] : $num, $rgb, $col{$term}[0]); +my @termlist = qw( cga xterm tango app html xkcd ); +push @termlist, qw( c64 msx2 mac2 risc arnegame cpc ) if exists $get{v}; +push @termlist, qw( ansi88 ); +push @termlist, qw( ansi256 ) if $ENV{PATH_INFO} =~ /256/; + +for my $term (@termlist) { + my $info = $palettes->{$term}; + ref $info eq 'HASH' or next; + my $caption = $info->{name} // $term; + $caption = sprintf('<%s %s>%s', + $info->{href} ? 'a' : 'span', + join(' ', + map { sprintf '%s="%s"', $_, $info->{$_} } + grep { defined $info->{$_} } + qw( href title ) + ), + $caption, + ) if $info->{href} or $info->{title}; + + if (my $mapinfo = $info->{rgbmap}) { + print '
$term
'."\n"; + printf "\n", $caption; + print coltable_hsv(@{$mapinfo}); + print "
%s
\n\n"; + } + + if (my $colours = $info->{list}) { + print '', "\n"; + printf "\n", $caption; + for my $num (0 .. $#{$colours}) { + my ($rgb, $name) = split /:/, $colours->[$num], 3; + $name ||= $num; + $name = [ $name, ['#333'] ] if $term eq 'xkcd'; + print '', colcell($name, $rgb); + } + print "
%s
\n\n"; } - print "

88-colour space

'; - for my $g (0 .. 3) { - print ''; - for my $b (0 .. 3) { - print colcell($r*4*4 + $g*4 + $b + 16, map {(0, 139, 205, 255)[$_]} $r, $g, $b); +sub coltable_hsv { + my ($dim, $rgbval, $greyramp) = @_; + + my $hmax = 2 * $dim * 3; # each face of the rgb cube + my $vmax = $dim - 1; + my $smax = $dim - 1; + $rgbval ||= sub { join('', @_), map { int $_ * 255 / $vmax } @_ }; + $greyramp ||= []; + + my %greymap; # name => value + my @colmap; # saturation => value => hue => [name, r,g,b] + my $offset = 16 * ($dim > 3); + + for my $r (0 .. $dim - 1) { + for my $g (0 .. $dim - 1) { + for my $b (0 .. $dim - 1) { + my @rgb = ($r, $g, $b); + + my $h = Shiar_Sheet::Colour->new(@rgb)->hue * $hmax; + my $v = max(@rgb); + my $s = abs(min(@rgb) - max(@rgb)); + + if (!$s) { + my ($index, $l) = $rgbval->(@rgb); + $greymap{$index} = $l; + next; + } + + $v = $vmax - $v; + $s = $smax - $s - $v; + + $colmap[$s][$v][$h] = [ $rgbval->(@rgb) ]; + } } } - print "
\n"; + + my $out = ''; + $out .= sprintf '', 3 * @{$_} for @colmap; + my $huerow = $colmap[0][0]; # first {$_} map { @{$_} } @colmap; + for my $h (grep { $huerow->[$_] } 0 .. $#{$huerow}) { + $out .= ''; + $out .= colcell(@$_) for map { $_->[$h] } map { @{$_} } @colmap; + } + + $offset += $dim ** 3; + $greymap{$offset++} = $_ for @{$greyramp}; + + $out .= ''; + my $col = 0; + my $colbreak = scalar map { @$_ } @colmap; # same width as hue rows + for my $num (sort { $greymap{$a} <=> $greymap{$b} } keys %greymap) { + $out .= '' unless $col++ % $colbreak; + $out .= colcell($num, ($greymap{$num}) x 3); + } + + return $out; } -print "\n"; -print '
', map { colcell(80, ($_) x 3) } 46, 92, 115, 139, 162, 185, 208, 231; -print "
\n\n"; -:>

+:>