-| # | xterm |
|---|
+
+ANSI (VT100, ISO-6429) 16-colour text palette
+as implemented by various systems and programs.
<:
-my %col = (
- -name => [
- qw/black red green orange blue magenta cyan gray
- gray red green yellow blue magenta cyan white/,
- qw/reset bold dim italic underline blink fastblink
- reverse hidden/,
- ],
- linux => [
- qw/000 CCC/,
- qw/000 A00 0A0 A50 00A A0A 0AA AAA
- 555 F55 5F5 FF5 55F F5F 5FF FFF/,
- ],
- xterm => [
- qw/000 CCC/,
- qw/000 C00 0C0 CC0 4682B4 C0C 0CC E5E5E5
- 4C4C4C F00 0F0 FF0 1E90FF F0F 0FF FFF/,
- ],
- tango => [
- qw/000 CCC/,
- qw/2E3436 CC0000 4E9A06 C4A000 3465A4 75507B 06989A D3D7CF
- 555753 EF2929 8AE234 FCE94F 729FCF AD7FA8 34E2E2 EEEEEC/,
- ],
-);
-
-for my $num (0 .. 15) {
- printf('
| %d | %s%s |
|---|
'."\n",
- $num,
- $col{-name}[$num],
- join('', map {sprintf ' ⪠',
- 'background:#'.$col{$_}[0].'; color:#'.$col{$_}[$num + 2],
- } qw/linux xterm tango/ ),
+print
+ "@termlist" ne 'default' ? 'Additional palettes are included as specified.' :
+ 'Also see 8-bit legacy hardware palettes.';
+:>
+
+
+
+<:
+use Shiar_Sheet::Colour 1.04;
+use List::Util qw( min max );
+use POSIX qw( ceil );
+
+my $palettes = do 'termcol.inc.pl';
+die "Cannot open palette data: $_\n" for $@ || $! || ();
+my $more = do 'termcol-xcolor.inc.pl';
+$palettes = {%$palettes, %$more};
+
+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;
+
+ my $sample = [ qw(#000 #FFF) ];
+ ($name, $sample) = @$name if ref $name eq 'ARRAY';
+
+ my $out = sprintf(' | %s',
+ join(',', map { int } @$col),
+ "background:$css; color:$inverse",
+ $name,
);
+ $out .= sprintf('%s',
+ "background:$_; color:$css", $minhex
+ ) for @$sample;
+ return "$out\n";
+}
+
+sub img_egapal {
+ my ($palette, $imgfile, $reindex) = @_;
+ return eval {
+ require Imager;
+ require MIME::Base64;
+
+ my @imgpal = map { Imager::Color->new(ref $_ ? @$_ : $_) } @{$palette};
+ state $imgcache = {};
+ my $img = $imgcache->{$imgfile}
+ //= Imager->new(file => "data/palimage/$imgfile")
+ or die Imager->errstr.$/;
+
+ do {
+ if ($reindex) {
+ $img->to_paletted({
+ make_colors => 'none',
+ colors => \@imgpal,
+ translate => 'closest',
+ });
+ }
+ else {
+ @{[ $img->getcolors ]} == @imgpal
+ or die "incompatible palette size\n";
+ $img->setcolors(colors => \@imgpal);
+ $img;
+ }
+ }->write(data => \my $imgdata, type => 'png');
+ return sprintf ' ',
+ MIME::Base64::encode_base64($imgdata);
+ } || $@;
+}
+
+sub coltable {
+ my ($term) = @_;
+ my $info = $palettes->{$term};
+
+ if (ref $info eq 'ARRAY') {
+ coltable($_) for @{$info};
+ }
+
+ 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 ''."\n";
+ printf "%s\n", $caption;
+ print coltable_hsv(@{$mapinfo});
+ print " \n\n";
+ }
+
+ if (my $table = $info->{table}) {
+ print ''."\n";
+ printf "%s\n", $caption;
+ for my $row (@$table) {
+ print '';
+ print colcell(ref $_ ? @$_ : $_ ? reverse split /:/ : undef) for @$row;
+ }
+
+ if (@draw) {
+ my $width = scalar @{ $table->[0] };
+ my @imgpal = map {
+ [ ref $_ ? @{$_}[1 .. 3] : map {hex} /(..)(..)(..)/ ]
+ } map { @{$_} } @{$table};
+ for (@draw) {
+ print " | ", img_egapal(\@imgpal, @{$_});
+ }
+ }
+ print " | \n\n";
+ }
+
+ if (my $palette = $info->{list}) {
+ my $order = $get{order} && $get{order}.'order';
+ my $colours = colorder($palette,
+ $info->{$order} // $palettes->{ $info->{parent} }->{$order}
+ );
+
+ my $rows = 8;
+ my $columns = ceil(@{$palette} / $rows);
+
+ print '', "\n";
+ printf "%s\n", $caption;
+ for my $row (0 .. $rows - 1) {
+ print '';
+ for my $col (0 .. $columns - 1) {
+ my $num = $row + $col * $rows;
+ my ($rgb, $name) = split /:/, $colours->[$num], 3;
+ $name //= $rgb && $num;
+ $name = [ $name, [] ] if $term =~ /^msx/ and !$num;
+ $name = [ $name, ['#333'] ] if $term eq 'xkcd';
+ print colcell($name, $rgb);
+ }
+ }
+
+ for (@draw) {
+ my $imgpal = colorder($palette,
+ $info->{ansiorder} // $palettes->{ $info->{parent} }->{ansiorder}
+ );
+ print " | ", img_egapal($imgpal, @{$_});
+ }
+ print " | \n\n";
+ }
}
-:> | |
+
+sub colorder {
+ my ($palette, $reorder) = @_;
+ return [ map { $palette->[$_] =~ s/:(?![^:])|$/:$_/r } @{$reorder} ]
+ if $reorder;
+ return $palette;
+}
+
+sub coltable_hsv {
+ my ($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 / $vmax } @_ };
+
+ my @greymap = @{$greyramp || []}; # [name, r, g=l, b]
+ my @colmap; # saturation => value => hue => [name, r,g,b]
+
+ 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, $s, $v) = Shiar_Sheet::Colour->new(@rgb)->hsv;
+
+ if (!$s) {
+ if (@greymap) {
+ push @greymap, [ $rgbval->(@rgb) ];
+ next;
+ }
+
+ $h = 1; # greyscale hue
+ $s = $smax - $v + 1; # spread brightness over saturation groups
+ $v &&= $smax # highest saturation
+ or $v = $s = 1; # black at initial column
+ }
+
+ $h *= $hmax;
+ $v = $vmax - $v;
+ $s = $smax - $s - $v;
+
+ $colmap[$s][$v][$h] = [ $rgbval->(@rgb) ];
+ }
+ }
+ }
+
+ my $out = '';
+ $out .= sprintf '