+
+for my $term (@termlist) {
+ my $info = $palettes->{$term};
+ ref $info eq 'HASH' or next;
+ my $caption = $info->{name} // $term;
+ $caption = sprintf('<%s %s>%s</%1$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 '<table class="color mapped">'."\n";
+ printf "<caption>%s</caption>\n", $caption;
+ print coltable_hsv(@{$mapinfo});
+ print "</table>\n\n";
+ }
+
+ if (my $colours = $info->{list}) {
+ if (my $reorder = $info->{ansiorder} and $get{v}) {
+ $colours = [ map { $colours->[$_] =~ s/:|$/:$_/r } @{$reorder} ];
+ }
+
+ my $rows = 8;
+ my $columns = ceil(@{$colours} / $rows);
+
+ print '<table class=color>', "\n";
+ printf "<caption>%s</caption>\n", $caption;
+ for my $row (0 .. $rows - 1) {
+ print '<tr>';
+ 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, $rgb);
+ }
+ }
+
+ print "<tr><td colspan=$columns>", img_egapal(\@{$colours}, @{$_}) for @draw;
+ print "</table>\n\n";
+ }
+}
+
+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 = '';
+ $out .= sprintf '<colgroup span=%d>', scalar @{$_} for @colmap;
+ my $huerow = $colmap[0][0]; # first {$_} map { @{$_} } @colmap;
+ for my $h (grep { $huerow->[$_] } 0 .. $#{$huerow}) {
+ $out .= '<tr>';
+ $out .= colcell(@$_) for map { $_->[$h] } map { reverse @{$_} } @colmap;
+ }
+
+ if (@greymap) {
+ $out .= '<tbody>';
+ my $col = 0;
+ my $colbreak = scalar map { @$_ } @colmap; # same width as hue rows
+ for my $cell (sort { $a->[1] <=> $b->[1] || $a->[0] <=> $b->[0] } @greymap) {
+ $out .= '<tr>' unless $col++ % $colbreak;
+ $out .= colcell(@{$cell});
+ }
+ }
+
+ if (@draw) {
+ my @palette = map { [ @{$_}[1 .. 3] ] } @greymap, map {@$_} map {@$_} @colmap;
+ my $tablespan = scalar map { @$_ } @colmap;
+ my $imgdata = img_egapal(\@palette, @{ $draw[0] });
+ $out .= "<tr><td colspan=$tablespan>$imgdata";
+ }
+
+ return $out;
+}
+
+:></div>
+<hr>