<:
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 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) = @_;
return eval {
require Imager;
require MIME::Base64;
my @imgpal = map { Imager::Color->new(ref $_ ? @$_ : $_) } @{$palette};
state $reindex = $imgfile =~ s/!$//;
state $img = Imager->new(file => "data/palimage/$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);
} || $@;
}
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, $rgb);
}
print ' | ', img_egapal(\@{$colours}) if $imgfile;
print " | \n\n";
}
}
sub coltable_hsv {
my ($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; # 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) ];
}
}
}
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 { @{$_} } @colmap;
}
if ($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}));
}
}
if ($imgfile) {
my @palette = map { [ @{$_}[1 .. 3] ] } map {@$_} map {@$_} @colmap;
my $imgdata = img_egapal(\@palette);
my $tablespan = scalar map { @$_ } @colmap;
$out .= "
$imgdata";
}
return $out;
}
:>
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