+<:
+use 5.010;
+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 $@ || $! || ();
-
-<:
-sub luminance {
- # perceived brightness (using ITU-R recommendation 601 luma co-efficients)
- my ($r, $g, $b) = @_;
- return $r*.299 + $g*.587 + $b*.114;
+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 colcell {
- my $id = shift;
- my @rgb = @_ >= 3 ? @_ : (map {hex} $_[0] =~ /(..)/g);
- my $rgb24 = '';
- $rgb24 .= sprintf '%X', min($_ / 17 + .5, 15) for @rgb[0..2];
- my $rgb48 = '';
- $rgb48 .= sprintf '%02X', $_ for @rgb[0..2];
- my $inverse = sprintf('%X', luminance(@rgb)/255 < .3 ? 12 : 0) x 3;
- return sprintf ' | %s | %s | %s'."\n",
- "background:#$rgb48; color:#$inverse",
- $id,
- "background:#000; color:#$rgb48",
- $rgb24,
- "background:#FFF; color:#$rgb48",
- $rgb24,
+sub img_egapal {
+ my ($palette) = @_;
+ return eval {
+ require Imager;
+ require MIME::Base64;
+
+ my @imgpal = map { Imager::Color->new(ref $_ ? @$_ : $_) } @{$palette};
+ state $img = Imager->new(file => "data/$imgfile")
+ or die Imager->errstr.$/;
+ @{[ $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);
+ } || $@;
}
-my %col = (
- -html => [
- qw/black maroon green olive navy purple cyan silver
- gray red lime yellow blue fuchsia aqua white/,
- qw/reset bold dim italic underline blink fastblink
- reverse hidden/,
- ],
- html => [
- qw/000000 CCCCCC/,
- qw/000000 800000 008000 808000 000080 800080 008080 C0C0C0
- 808080 FF0000 00FF00 FFFF00 0000FF FF00FF 00FFFF FFFFFF/,
- ],
- cga => [
- qw/000000 CCCCCC/,
- qw/000000 AA0000 00AA00 AA5500 0000AA AA00AA 00AAAA AAAAAA
- 555555 FF5555 55FF55 FFFF55 5555FF FF55FF 55FFFF FFFFFF/,
- ],
- xterm => [
- qw/000000 CCCCCC/,
- qw/000000 CC0000 00CC00 CCCC00 4682B4 CC00CC 00CCCC E5E5E5
- 4C4C4C FF0000 00FF00 FFFF00 1E90FF FF00FF 00FFFF FFFFFF/,
- ],
- tango => [
- qw/000000 CCCCCC/,
- qw/2E3436 CC0000 4E9A06 C4A000 3465A4 75507B 06989A D3D7CF
- 555753 EF2929 8AE234 FCE94F 729FCF AD7FA8 34E2E2 EEEEEC/,
- ],
-);
+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 ''."\n";
+ printf "%s\n", $caption;
+ print coltable_hsv(@{$mapinfo});
+ print " \n\n";
+ }
+
+ if (my $colours = $info->{list}) {
+ if (my $reorder = $info->{ansiorder} and $get{v}) {
+ $colours = [ map { $colours->[$_] =~ s/:|$/:$_/r } @{$reorder} ];
+ }
+
+ print '', "\n";
+ printf "%s\n", $caption;
+ for my $num (0 .. $#{$colours}) {
+ my ($rgb, $name) = split /:/, $colours->[$num], 3;
+ $name ||= $num;
+ $name = [ $name, [] ] if $term =~ /^msx/ and !$num;
+ $name = [ $name, ['#333'] ] if $term eq 'xkcd';
+ print '', colcell($name, $rgb);
+ }
-for my $term (qw/html cga xterm tango/) {
- print '- ', "\n";
- print '
', "\n";
- print "$term\n";
- for my $num (0 .. 15) {
- my $rgb = $col{$term}[$num + 2];
- print '',
- colcell($col{"-$term"}[$num] || $num, $rgb, $col{$term}[0]);
+ print ' | ', img_egapal(\@{$colours}) if $imgfile;
+ print " | \n\n";
}
- print " \n\n";
}
-:>
-
-88-colour space
-<:
-for my $r (0 .. 3) {
- print '';
- for my $g (0 .. 3) {
- print '';
- for my $b (0 .. 3) {
- my $index = $r*4*4 + $g*4 + $b + 16;
- print colcell($index, 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 } @_ };
+
+ 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) {
+ if ($greyramp) {
+ my ($index, $l) = $rgbval->(@rgb);
+ $greymap{$index} = $l;
+ next;
+ }
+
+ $h = $hmax; # greyscale hue
+ $s = 1; # lowest saturation for other hues
+ $v = $s = $vmax if !$v; # black at full saturation
+ }
+
+ $v = $vmax - $v;
+ $s = $smax - $s - $v;
+
+ $colmap[$s][$v][$h] = [ $rgbval->(@rgb) ];
+ }
}
}
- print " \n";
-}
-print "\n";
-print '';
-print colcell(80, ($_) x 3) for 46, 92, 115, 139, 162, 185, 208, 231;
-print "
\n\n";
-:>
+ my $out = '';
+ $out .= sprintf '', scalar @{$_} 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;
+ }
-
-256-colour space
-<:
-for my $r (0 .. 5) {
- print '';
- for my $g (0 .. 5) {
- print '';
- for my $b (0 .. 5) {
- my $index = $r*6*6 + $g*6 + $b + 16;
- print colcell($index, map { $_ && $_*40 + 55 } $r, $g, $b);
+ if ($greyramp) {
+ $offset += $dim ** 3;
+ $greymap{$offset++} = $_ for @{$greyramp};
+ }
+
+ if (%greymap) {
+ $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}));
}
}
- print "
\n";
-}
-print "\n";
-for my $row (0, 12) {
- print '';
- print colcell(232+$_, ($_*10 + 8) x 3) for $row .. $row+11;
- print "
\n";
+ if ($imgfile) {
+ my @palette = map { [ @{$_}[1 .. 3] ] } map {@$_} map {@$_} @colmap;
+ my $imgdata = img_egapal(\@palette);
+ my $tablespan = scalar map { @$_ } @colmap;
+ $out .= "$imgdata";
+ }
+
+ return $out;
}
-print "\n";
-:>
+:>
-
-
-
|