latin: cmymap row of subtractive colour mix

[sheet.git] / writing-latn.inc.pl

diff --git a/writing-latn.inc.pl b/writing-latn.inc.pl
index 0d6ecb4d6305a0777b138481c7111ae7a25102c0..60b24f960d9b38ac07122b05eca283ff89fdb6b4 100644 (file)
--- a/writing-latn.inc.pl
+++ b/writing-latn.inc.pl
@@ -49,15 +49,19 @@ sub dispbar {
        );
 }
 
-sub disprgb {
-       my ($index) = @_;
-       my $circle = '<circle cx="%s" cy="%s" r="8" fill="#%X%X%X"/>';
+sub disphues {
+       my ($index, $hues, $opaque) = @_;
+       my @lum = ($index % 3, $index / 3 % 3, $index / 9);  # hue opacities (0..2)x3
+       my @lumf = $opaque ? ('hsl(%s,100%%,50%%)', 'hsl(%s,100%%,25%%)') :
+               ('hsl(%s,100%%,50%%)', 'hsla(%s,100%%,50%%,.5)');
        return sprintf(
                '<svg width="16" height="16" viewBox="0 0 22 22">%s</svg>',
-               join '',
-                       sprintf($circle, 10, 10, [0, 8, 15]->[$index % 3], 0, 0),
-                       sprintf($circle, 11, 12, 0, [0, 8, 15]->[$index / 3 % 3], 0),
-                       sprintf($circle, 12, 10, 0, 0, [0, 8, 15]->[$index / 9]),
+               join '', map {
+                       my $colf = $lumf[ $lum[$_] ];
+                       !$colf ? () : sprintf('<circle cx="%d" cy="%d" r="%d" fill="%s"/>',
+                               10 + $_, $_ == 1 ? 12 : 10, 10, sprintf($colf, $hues->[$_])
+                       );
+               } 0 .. 2
        );
 }
 
@@ -465,8 +469,24 @@ rgbmap => {
        style => [
                'svg { isolation: isolate }',
                'svg circle { mix-blend-mode: screen }',
+               '.sample { background: black }',
+       ],
+       list => [
+               map { disphues($_, [0, 240, 120], 1) } # Red, Blue, Green
+               0 .. 3*3*3 - 1
+       ],
+},
+cmymap => {
+       title => 'CMYmap',
+       style => [
+               'svg { isolation: isolate }',  # mix on white
+               'svg circle { mix-blend-mode: multiply }',
+               '.sample { background: white }',
+       ],
+       list => [
+               map { disphues($_, [180, 60, 300]) } # Cyan, Yellow, Magenta
+               0 .. 3*3*3 - 1
        ],
-       list => [ map { disprgb($_) } 0 .. 3*3*3 ],
 },
 dni => {
        title => "D'ni",