latin: rgbmap row of regular colour mix svg

Similar to Chromacons but adding RGB channels uncustomised in 3 intensities,
giving an exact map to 3**3 results.

diff --git a/writing-latn.inc.pl b/writing-latn.inc.pl
index d8d0d53f27af92d45cf6aa4821b8156ed2e8e036..10b30cebe9c7ea67a19941cfb0e606125cdfb901 100644 (file)
--- a/writing-latn.inc.pl
+++ b/writing-latn.inc.pl
@@ -448,6 +448,23 @@ rm4scc => {
                '', 1, 3  # start/end
        ],
 },
+rgbmap => {
+       title => 'RGBmap',
+       style => [
+               'svg { isolation: isolate }',
+               'svg circle { mix-blend-mode: screen }',
+       ],
+       list => [
+               map { '<svg width="16" height="16" viewBox="0 0 8 8">'.$_.'</svg>' }
+               map {
+                       my $circle = '<circle cx="%s" cy="%s" r="8" fill="#%X%X%X"/>';
+                       join '',
+                       sprintf($circle, 0, 0, [0, 8, 15]->[$_ % 3], 0, 0),
+                       sprintf($circle, 8, 0, 0, [0, 8, 15]->[$_ / 3 % 3], 0),
+                       sprintf($circle, 6, 8, 0, 0, [0, 8, 15]->[$_ / 9]),
+               } 1 .. 3*3*3
+       ],
+},
 dni => {
        title => "D'ni",
        list => [