<(common.inc.plp)><:
if (my ($name) = $Request =~ /(.+)\.gpl\z/) {
my $palettes = Data('termcol');
my $palette = $palettes->{$name}
or Abort("Palette '$name' not found", 404);
ref $palette ne 'ARRAY'
or Abort("Group contains multiple palettes: ".join(', ', @{$palette}));
$header{content_type} = 'text/x-gimp-gpl';
say 'GIMP Palette';
say 'Name: ', $palette->{name} // $name;
say 'Columns: 8';
say '#';
for (@{ $palette->{list} }) {
my ($rgb, $name) = split /:/, $_, 3;
say join ' ', unpack('C*', pack 'H6', $rgb), $name;
}
exit;
}
Html({
title => ($Request ? 'terminal colour' : 'colour palettes') . ' cheat sheet',
version => '1.4',
description => [!$Request ? "Comparison of various colour palettes." : (
"Index of all terminal/console colour codes,",
"with an example result of various environments.",
)],
keywords => [qw'
color colour code terminal console escape table xterm rxvt
ansi vt100 8bit 4bit cga ega vga rgb hsv game emulator display
'],
data => ['termcol.inc.pl'],
});
my @draw = map { [$_, s/\W+\z//] } grep { $_ } split m(/),
$get{img} // exists $get{img} && 'compile.png';
my @termlist;
push @termlist, split /\W+/, $Request || 'default';
say "<h1>$_</h1>\n" for $Request ? 'Colour palettes' : 'Terminal colours';
say '<p>';
if ("@termlist" eq 'default') {
say '<span title="ECMA-48">ANSI</span> (VT100, ISO-6429) 16-colour text palette';
say 'as implemented by various systems and programs.';
say 'Also see <a href="/termcol/legacy">8-bit legacy hardware</a> palettes.';
}
elsif ("@termlist" eq 'legacy') {
say 'Colour palettes of various 8-bit legacy systems and retro games.';
say 'Also see <a href="/termcol">ANSI console</a> palettes.';
}
else {
say 'Comparison of requested colour palettes.';
}
:>
<div class="section">
<:
use Shiar_Sheet::Colour 1.04;
use List::Util qw( min max );
use POSIX qw( ceil );
my $palettes = Data('termcol');
sub colcell {
my $name = shift // return "<td>\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 $out = sprintf('<td title="%s" style="%s">%s',
join(',', map { int } @$col),
"background:$css; color:$inverse",
$name,
);
$out .= sprintf('<samp style="%s"><small>%s</small></samp>',
"background:$_; 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 $imgdata, type => 'png');
return sprintf '<img src="data:image/png;base64,%s">',
MIME::Base64::encode_base64($imgdata);
} || $@;
}
sub coltable {
my ($term) = @_;
my $info = $palettes->{$term};
if (ref $info eq 'ARRAY') {
coltable($_) for @{$info};
return;
}
if (ref $info eq 'CODE') {
coltable($_) for $info->($palettes);
return;
}
ref $info eq 'HASH' or return;
my $order = $get{order} && $get{order}.'order';
my $reorder = $info->{$order} // $palettes->{ $info->{parent} }->{$order};
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 $info->{title};
if ($info->{table} or $info->{rgbmap}) {
say '<table class="color mapped">';
say sprintf '<caption>%s</caption>', $caption;
print coltable_hsv(@{$_}) for $info->{rgbmap} || ();
if (my $table = $info->{table}) {
$table = [ @{$table}[@{$reorder}] ] if $reorder;
for my $row (@$table) {
if (!$row) {
say '<tbody>';
next;
}
print '<tr>';
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 "<tr><td colspan=$width>", img_egapal(\@imgpal, @{$_});
}
}
}
say "</table>\n";
}
if (my $palette = $info->{list}) {
my $colours = colorder($palette, $reorder);
my $rows = 8;
my $columns = ceil(@{$palette} / $rows);
say '<table class=color>';
say sprintf '<caption>%s</caption>', $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 $term =~ /^msx/ and !$name;
$name = [ $name, ['#333'] ] if $term eq 'xkcd';
print colcell($name, $rgb);
}
}
for (@draw) {
my $imgpal = colorder($palette,
$info->{ansiorder} // $palettes->{ $info->{parent} }->{ansiorder}
);
print "<tr><td colspan=$columns>", img_egapal($imgpal, @{$_});
}
say "</table>\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;
my $vmax = $dim - 1;
my $smax = $dim - 1;
$rgbval ||= sub { join('', @_), map { int $_ * 255 / $vmax } @_ };
my @greymap = @{$greyramp || []};
my @colmap;
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;
$s = $smax - $v + 1;
$v &&= $smax
or $v = $s = 1;
}
$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];
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;
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 $out;
}
coltable($_) for @termlist;
:></div>
<hr>