2 lines
2.8 KiB
JavaScript
Executable file
2 lines
2.8 KiB
JavaScript
Executable file
var r={grad:.9,turn:360,rad:360/(2*Math.PI)},t=function(r){return"string"==typeof r?r.length>0:"number"==typeof r},a=function(r,t,a){return void 0===t&&(t=0),void 0===a&&(a=Math.pow(10,t)),Math.round(a*r)/a+0},n=function(r,t,a){return void 0===t&&(t=0),void 0===a&&(a=1),r>a?a:r>t?r:t},u=function(r){var t=r/255;return t<.04045?t/12.92:Math.pow((t+.055)/1.055,2.4)},h=function(r){return 255*(r>.0031308?1.055*Math.pow(r,1/2.4)-.055:12.92*r)},o=96.422,e=100,c=82.521,i=function(r){var t,a,u={x:.9555766*(t=r).x+-.0230393*t.y+.0631636*t.z,y:-.0282895*t.x+1.0099416*t.y+.0210077*t.z,z:.0122982*t.x+-.020483*t.y+1.3299098*t.z};return a={r:h(.032404542*u.x-.015371385*u.y-.004985314*u.z),g:h(-.00969266*u.x+.018760108*u.y+41556e-8*u.z),b:h(556434e-9*u.x-.002040259*u.y+.010572252*u.z),a:r.a},{r:n(a.r,0,255),g:n(a.g,0,255),b:n(a.b,0,255),a:n(a.a)}},l=function(r){var t=u(r.r),a=u(r.g),h=u(r.b);return function(r){return{x:n(r.x,0,o),y:n(r.y,0,e),z:n(r.z,0,c),a:n(r.a)}}(function(r){return{x:1.0478112*r.x+.0228866*r.y+-.050127*r.z,y:.0295424*r.x+.9904844*r.y+-.0170491*r.z,z:-.0092345*r.x+.0150436*r.y+.7521316*r.z,a:r.a}}({x:100*(.4124564*t+.3575761*a+.1804375*h),y:100*(.2126729*t+.7151522*a+.072175*h),z:100*(.0193339*t+.119192*a+.9503041*h),a:r.a}))},b=216/24389,d=24389/27,f=function(r){return{l:n(r.l,0,100),c:r.c,h:(t=r.h,(t=isFinite(t)?t%360:0)>0?t:t+360),a:r.a};var t},p=function(r){return{l:a(r.l,2),c:a(r.c,2),h:a(r.h,2),a:a(r.a,3)}},v=function(r){var a=r.l,n=r.c,u=r.h,h=r.a,o=void 0===h?1:h;if(!t(a)||!t(n)||!t(u))return null;var e=f({l:Number(a),c:Number(n),h:Number(u),a:Number(o)});return M(e)},y=function(r){var t=function(r){var t=l(r),a=t.x/o,n=t.y/e,u=t.z/c;return a=a>b?Math.cbrt(a):(d*a+16)/116,{l:116*(n=n>b?Math.cbrt(n):(d*n+16)/116)-16,a:500*(a-n),b:200*(n-(u=u>b?Math.cbrt(u):(d*u+16)/116)),alpha:t.a}}(r),n=a(t.a,3),u=a(t.b,3),h=Math.atan2(u,n)/Math.PI*180;return{l:t.l,c:Math.sqrt(n*n+u*u),h:h<0?h+360:h,a:t.alpha}},M=function(r){return t={l:r.l,a:r.c*Math.cos(r.h*Math.PI/180),b:r.c*Math.sin(r.h*Math.PI/180),alpha:r.a},n=t.a/500+(a=(t.l+16)/116),u=a-t.b/200,i({x:(Math.pow(n,3)>b?Math.pow(n,3):(116*n-16)/d)*o,y:(t.l>8?Math.pow((t.l+16)/116,3):t.l/d)*e,z:(Math.pow(u,3)>b?Math.pow(u,3):(116*u-16)/d)*c,a:t.alpha});var t,a,n,u},x=/^lch\(\s*([+-]?\d*\.?\d+)%\s+([+-]?\d*\.?\d+)\s+([+-]?\d*\.?\d+)(deg|rad|grad|turn)?\s*(?:\/\s*([+-]?\d*\.?\d+)(%)?\s*)?\)$/i,s=function(t){var a=x.exec(t);if(!a)return null;var n,u,h=f({l:Number(a[1]),c:Number(a[2]),h:(n=a[3],u=a[4],void 0===u&&(u="deg"),Number(n)*(r[u]||1)),a:void 0===a[5]?1:Number(a[5])/(a[6]?100:1)});return M(h)};module.exports=function(r,t){r.prototype.toLch=function(){return p(y(this.rgba))},r.prototype.toLchString=function(){return r=p(y(this.rgba)),t=r.l,a=r.c,n=r.h,(u=r.a)<1?"lch("+t+"% "+a+" "+n+" / "+u+")":"lch("+t+"% "+a+" "+n+")";var r,t,a,n,u},t.string.push([s,"lch"]),t.object.push([v,"lch"])};
|