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authorTor Andersson <tor@ccxvii.net>2024-10-25 11:58:58 +0200
committerTor Andersson <tor@ccxvii.net>2024-10-26 00:00:01 +0200
commit5d81b4294bd8f9b20ac8a396a185f6cf9550c00f (patch)
tree1fd4e5fd1bbab268f3421cef825d6504b39d5370 /tools/colors.js
parent7122c8101e49300b7e29266a939f355e9eb8ffd3 (diff)
download1989-dawn-of-freedom-5d81b4294bd8f9b20ac8a396a185f6cf9550c00f.tar.gz
Update client.
Fixed some spelling errors in space data table. Create tools directory and add Makefile. Add layout.svg with boxes drawn on top of locations. Add genlayout.js to create list of box locations. Add gencolors.js to create beveled marker border colors. Major rewrite of play.js and play.css with official assets.
Diffstat (limited to 'tools/colors.js')
-rw-r--r--tools/colors.js110
1 files changed, 110 insertions, 0 deletions
diff --git a/tools/colors.js b/tools/colors.js
new file mode 100644
index 0000000..f8f7ace
--- /dev/null
+++ b/tools/colors.js
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+"use strict"
+
+function rgb_from_any(color) {
+ switch (color.mode) {
+ case "rgb": return color
+ case "lrgb": return rgb_from_lrgb(color)
+ case "oklab": return rgb_from_oklab(color)
+ }
+}
+
+function lrgb_from_any(color) {
+ switch (color.mode) {
+ case "rgb": return lrgb_from_rgb(color)
+ case "lrgb": return color
+ case "oklab": return lrgb_from_oklab(color)
+ }
+}
+
+function oklab_from_any(color) {
+ switch (color.mode) {
+ case "rgb": return oklab_from_rgb(color)
+ case "lrgb": return oklab_from_lrgb(color)
+ case "oklab": return color
+ }
+}
+
+function format_hex(color) {
+ let {r, g, b} = rgb_from_any(color)
+ let adj = 1
+ r = Math.round(Math.max(0, Math.min(1, r)) * 255)
+ g = Math.round(Math.max(0, Math.min(1, g)) * 255)
+ b = Math.round(Math.max(0, Math.min(1, b)) * 255)
+ let x = (r << 16) | (g << 8) | b
+ return "#" + x.toString(16).padStart(6, "0")
+}
+
+function parse_hex(str) {
+ let x = parseInt(str.substring(1), 16)
+ return {
+ mode: "rgb",
+ r: ((x >> 16) & 255) / 255.0,
+ g: ((x >> 8) & 255) / 255.0,
+ b: ((x) & 255) / 255.0
+ }
+}
+
+function lrgb_from_rgb({ r, g, b }) {
+ function to_linear(c) {
+ let ac = Math.abs(c)
+ if (ac < 0.04045)
+ return c / 12.92
+ return (Math.sign(c) || 1) * Math.pow((ac + 0.055) / 1.055, 2.4)
+ }
+ return {
+ mode: "lrgb",
+ r: to_linear(r),
+ g: to_linear(g),
+ b: to_linear(b)
+ }
+}
+
+function rgb_from_lrgb({ r, g, b }) {
+ function from_linear(c) {
+ let ac = Math.abs(c)
+ if (ac > 0.0031308)
+ return (Math.sign(c) || 1) * (1.055 * Math.pow(ac, 1 / 2.4) - 0.055)
+ return c * 12.92
+ }
+ return {
+ mode: "rgb",
+ r: from_linear(r),
+ g: from_linear(g),
+ b: from_linear(b)
+ }
+}
+
+function oklab_from_lrgb({ r, g, b }) {
+ let L = Math.cbrt(0.4122214708 * r + 0.5363325363 * g + 0.0514459929 * b)
+ let M = Math.cbrt(0.2119034982 * r + 0.6806995451 * g + 0.1073969566 * b)
+ let S = Math.cbrt(0.0883024619 * r + 0.2817188376 * g + 0.6299787005 * b)
+ return {
+ mode: "oklab",
+ l: 0.2104542553 * L + 0.793617785 * M - 0.0040720468 * S,
+ a: 1.9779984951 * L - 2.428592205 * M + 0.4505937099 * S,
+ b: 0.0259040371 * L + 0.7827717662 * M - 0.808675766 * S
+ }
+}
+
+function lrgb_from_oklab({ l, a, b }) {
+ let L = Math.pow(l + 0.3963377774 * a + 0.2158037573 * b, 3)
+ let M = Math.pow(l - 0.1055613458 * a - 0.0638541728 * b, 3)
+ let S = Math.pow(l - 0.0894841775 * a - 1.291485548 * b, 3)
+ return {
+ mode: "lrgb",
+ r: +4.0767416621 * L - 3.3077115913 * M + 0.2309699292 * S,
+ g: -1.2684380046 * L + 2.6097574011 * M - 0.3413193965 * S,
+ b: -0.0041960863 * L - 0.7034186147 * M + 1.707614701 * S
+ }
+}
+
+function oklab_from_rgb(rgb) {
+ return oklab_from_lrgb(lrgb_from_rgb(rgb))
+}
+
+function rgb_from_oklab(oklab) {
+ return rgb_from_lrgb(lrgb_from_oklab(oklab))
+}
+
+if (typeof module === "object")
+ module.exports = { format_hex, parse_hex, rgb_from_any, lrgb_from_any, oklab_from_any }