use List::Util qw( min max );
sub colcell {
- my $name = shift or return "<td colspan=3>\n";
+ my $name = shift // return "<td colspan=3>\n";
my $col = Shiar_Sheet::Colour->new(@_);
my $minhex = $col->rgb24;
my $css = '#' . $col->rgb48;
}
print "</table>\n\n";
}
-:></div>
-
-<hr>
-
-<div class="section">
-<h2>88-colour space</h2>
-<:
-print coltable_hsv(4,
- sub {(0, 139, 205, 255)[$_]},
- [map { ($_ + 2 + ($_>0)) * 255/11 } 0 .. 7],
-);
+if (exists $get{v}) {
+ print "<table class=mapped>\n";
+ print "<caption>Amstrad CPC</caption>\n";
+ print coltable_hsv(3, sub {
+ $_[2] + 3 * ($_[0] + 3 * $_[1]),
+ map { $_ && $_ * 127 + 1 } @_
+ });
+ print "</table>\n\n";
+}
:></div>
-<: if ($ENV{PATH_INFO} =~ /256/) { :>
+
<hr>
<div class="section">
-<h2>256-colour space</h2>
<:
sub coltable_hsv {
my ($dim, $rgbval, $greyramp) = @_;
- my $hmax = ($dim + $dim - 1) * 2 + ($dim - 2) * 2 + 3;
+ 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 } @_ };
+ $greyramp ||= [];
my %greymap; # name => value
my @colmap; # saturation => value => hue => [name, r,g,b]
- my $offset = 16;
+ my $offset = 16 * ($dim > 3);
for my $r (0 .. $dim - 1) {
for my $g (0 .. $dim - 1) {
for my $b (0 .. $dim - 1) {
- my $index = $r*$dim*$dim + $g*$dim + $b + $offset;
- my @rgb = map { &$rgbval } $r, $g, $b;
+ my @rgb = ($r, $g, $b);
my $h = Shiar_Sheet::Colour->new(@rgb)->hue * $hmax;
- my $v = int(max(@rgb) / 255 * $vmax);
- my $s = abs(min(@rgb) - max(@rgb)) / 255 * $smax;
+ my $v = max(@rgb);
+ my $s = abs(min(@rgb) - max(@rgb));
if (!$s) {
- $greymap{$index} = $rgb[0];
+ my ($index, $l) = $rgbval->(@rgb);
+ $greymap{$index} = $l;
next;
}
$v = $vmax - $v;
$s = $smax - $s - $v;
- $colmap[$s][$v][$h] = [$index, @rgb];
+ $colmap[$s][$v][$h] = [ $rgbval->(@rgb) ];
}
}
}
- my $out = '<table class=mapped>';
+ my $out = '';
$out .= sprintf '<colgroup span=%d>', 3 * @{$_} 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 { @{$_} } @colmap;
}
- $out .= "</table>\n\n";
$offset += $dim ** 3;
$greymap{$offset++} = $_ for @{$greyramp};
- $out .= '<table>';
+ $out .= '<tbody>';
my $col = 0;
- my $colbreak = keys(%greymap) / 2; # split into 2 rows
+ my $colbreak = scalar map { @$_ } @colmap; # same width as hue rows
for my $num (sort { $greymap{$a} <=> $greymap{$b} } keys %greymap) {
$out .= '<tr>' unless $col++ % $colbreak;
$out .= colcell($num, ($greymap{$num}) x 3);
}
- $out .= "</table>\n\n";
return $out;
}
-print coltable_hsv(6,
- sub { $_ && $_*40 + 55 },
- [ map { $_ * 10 + 8 } 0 .. 23 ],
-);
+{
+ print "<h2>88-colour space</h2>\n";
+ print "<table class=mapped>\n";
+ print coltable_hsv(4,
+ sub {
+ $_[2] + 4 * ($_[1] + 4 * $_[0]) + 16,
+ map { (0, 139, 205, 255)[$_] } @_
+ },
+ [map { ($_ + 2 + ($_>0)) * 255/11 } 0 .. 7],
+ );
+ print "</table>\n";
+}
+
+if ($ENV{PATH_INFO} =~ /256/) {
+ print "<h2>256-colour space</h2>\n";
+ print "<table class=mapped>\n";
+ print coltable_hsv(6,
+ sub {
+ $_[2] + 6 * ($_[1] + 6 * $_[0]) + 16,
+ map { $_ && $_*40 + 55 } @_
+ },
+ [ map { $_ * 10 + 8 } 0 .. 23 ],
+ );
+ print "</table>\n";
+}
:></div>
-<: } :>
<hr>