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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 return;
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}) {
say '';
say sprintf '%s', $caption;
print coltable_hsv(@{$mapinfo});
say " \n";
}
if (my $table = $info->{table}) {
say '';
say sprintf '%s', $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, @{$_});
}
}
say " | \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);
say '';
say sprintf '%s', $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, @{$_});
}
say " | \n";
}
}
sub colorder {
my ($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 = '';
$out .= sprintf '', scalar @{$_} for @colmap;
my $huerow = $colmap[0][0]; # first {$_} map { @{$_} } @colmap;
for my $h (grep { $huerow->[$_] } 0 .. $#{$huerow}) {
$out .= ' | ';
$out .= colcell(@$_) for map { $_->[$h] } map { reverse @{$_} } @colmap;
}
if (@greymap) {
$out .= '
';
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 .= '' 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 .= "
$imgdata";
}
return $out;
}
coltable($_) for @termlist;
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