X-Git-Url: http://git.shiar.nl/sheet.git/blobdiff_plain/1f3b44e51107dc97ce2bded07b93325e96835744..032b7eb4897d7517e94c7fe2e1d414be8d925c9f:/termcol.plp

diff --git a/termcol.plp b/termcol.plp
index 16b3dfe..9262bf3 100644
--- a/termcol.plp
+++ b/termcol.plp
@@ -28,11 +28,11 @@ print
 
 <div class="section">
 <:
-use Shiar_Sheet::Colour '1.02';
+use Shiar_Sheet::Colour '1.03';
 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;
@@ -226,79 +226,79 @@ for my $term (@termlist) {
 <hr>
 
 <div class="section">
-<h2>88-colour space</h2>
 <:
-for my $r (0 .. 3) {
-	print '<table>';
-	for my $g (0 .. 3) {
-		print '<tr>';
-		for my $b (0 .. 3) {
-			my $index = $r*4*4 + $g*4 + $b + 16;
-			print colcell($index, map {(0, 139, 205, 255)[$_]} $r, $g, $b);
-		}
-	}
-	print "</table>\n";
-}
-print "\n";
+sub coltable_hsv {
+	my ($dim, $rgbval, $greyramp) = @_;
 
-print '<table><tr>';
-print colcell(80+$_, (($_ + 2 + ($_>0)) * 255/11) x 3) for 0 .. 7;
-print "</table>\n\n";
+	my $hmax = 2 * $dim * 3;  # each face of the rgb cube
+	my $vmax = $dim - 1;
+	my $smax = $dim - 1;
 
-:></div>
-<: if ($ENV{PATH_INFO} =~ /256/) { :>
-<hr>
+	my %greymap;  # name => value
+	my @colmap;  # saturation => value => hue => [name, r,g,b]
+	my $offset = 16;
 
-<div class="section">
-<h2>256-colour space</h2>
-<:
-my @colmap;  # saturation => value => hue => colcell
-for my $r (0 .. 5) {
-	for my $g (0 .. 5) {
-		for my $b (0 .. 5) {
-			my $index = $r*6*6 + $g*6 + $b + 16;
-			my @rgb = map { $_ && $_*40 + 55 } $r, $g, $b;
+	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 + $offset;
+				my @rgb = ($r, $g, $b);
 
-			my $h = Shiar_Sheet::Colour->new(@rgb)->hue * 35;
-			my $v = int(max(@rgb) / 255 * 5);
-			my $s = abs(min(@rgb) - max(@rgb)) / 255 * 7;
-			my $grey = !$s;
+				my $h = Shiar_Sheet::Colour->new(@rgb)->hue * $hmax;
+				my $v = max(@rgb);
+				my $s = abs(min(@rgb) - max(@rgb));
 
-			$h-- for grep {$h >= $_} 4, 6, 16, 19, 28, 31;
-			$v = 5 - $v;
-			$s = 7 - $s - $v;
-			$s-- if $s;
+				if (!$s) {
+					$greymap{$index} = $rgbval->($r);
+					next;
+				}
 
-			if ($grey) {
-				$h = 30;  # greyscale hue
-				$s -= 2;  # lowest saturation for other hues
-				$v = $s = 0 if $s < 0;  # black at full saturation
-			}
+				$v = $vmax - $v;
+				$s = $smax - $s - $v;
 
-			$colmap[$s][$v][$h] = [$index, @rgb];
+				$colmap[$s][$v][$h] = [$index, map { $rgbval->($_) } @rgb];
+			}
 		}
 	}
-}
 
-{
-	print '<table>';
-	for my $h (0 .. 30) {
-		print '<tr>';
-		print colcell(@$_) for map { $_->[$h] } map { @{$_} } @colmap;
+	my $out = '<table class=mapped>';
+	$out .= sprintf '<colgroup span=%d>', 3 * @{$_} 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;
 	}
-	print "</table>\n";
+
+	$offset += $dim ** 3;
+	$greymap{$offset++} = $_ for @{$greyramp};
+
+	$out .= '<tbody>';
+	my $col = 0;
+	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 "\n";
 
-	print '<table>';
-for my $row (0, 12) {
-	print '<tr>';
-	print colcell(232+$_, ($_*10 + 8) x 3) for $row .. $row+11;
+{
+	print "<h2>88-colour space</h2>\n";
+	print coltable_hsv(4,
+		sub {(0, 139, 205, 255)[$_[0]]},
+		[map { ($_ + 2 + ($_>0)) * 255/11 } 0 .. 7],
+	);
 }
-	print "</table>\n";
-print "\n";
 
+if ($ENV{PATH_INFO} =~ /256/) {
+	print "<h2>256-colour space</h2>\n";
+	print coltable_hsv(6,
+		sub { $_[0] && $_[0]*40 + 55 },
+		[ map { $_ * 10 + 8 } 0 .. 23 ],
+	);
+}
 :></div>
-<: } :>
 <hr>