libjs-husl 6.0.1+dfsg-1 / usr / share / javascript / husl / husl.min.js

(function(){var L_to_Y,Y_to_L,conv,distanceFromPole,dotProduct,epsilon,fromLinear,getBounds,intersectLineLine,kappa,lengthOfRayUntilIntersect,m,m_inv,maxChromaForLH,maxSafeChromaForL,refU,refV,root,toLinear;m={R:[3.2409699419045213,-1.5373831775700935,-.4986107602930033],G:[-.9692436362808798,1.8759675015077206,.04155505740717561],B:[.05563007969699361,-.20397695888897657,1.0569715142428786]};m_inv={X:[.4123907992659595,.35758433938387796,.1804807884018343],Y:[.21263900587151036,.7151686787677559,.07219231536073371],Z:[.01933081871559185,.11919477979462599,.9505321522496606]};refU=.19783000664283681;refV=.468319994938791;kappa=903.2962962962963;epsilon=.008856451679035631;getBounds=function(L){var bottom,channel,j,k,len1,len2,m1,m2,m3,ref,ref1,ref2,ret,sub1,sub2,t,top1,top2;sub1=Math.pow(L+16,3)/1560896;sub2=sub1>epsilon?sub1:L/kappa;ret=[];ref=["R","G","B"];for(j=0,len1=ref.length;j<len1;j++){channel=ref[j];ref1=m[channel],m1=ref1[0],m2=ref1[1],m3=ref1[2];ref2=[0,1];for(k=0,len2=ref2.length;k<len2;k++){t=ref2[k];top1=(284517*m1-94839*m3)*sub2;top2=(838422*m3+769860*m2+731718*m1)*L*sub2-769860*t*L;bottom=(632260*m3-126452*m2)*sub2+126452*t;ret.push([top1/bottom,top2/bottom])}}return ret};intersectLineLine=function(line1,line2){return(line1[1]-line2[1])/(line2[0]-line1[0])};distanceFromPole=function(point){return Math.sqrt(Math.pow(point[0],2)+Math.pow(point[1],2))};lengthOfRayUntilIntersect=function(theta,line){var b1,len,m1;m1=line[0],b1=line[1];len=b1/(Math.sin(theta)-m1*Math.cos(theta));if(len<0){return null}return len};maxSafeChromaForL=function(L){var b1,j,len1,lengths,m1,ref,ref1,x;lengths=[];ref=getBounds(L);for(j=0,len1=ref.length;j<len1;j++){ref1=ref[j],m1=ref1[0],b1=ref1[1];x=intersectLineLine([m1,b1],[-1/m1,0]);lengths.push(distanceFromPole([x,b1+x*m1]))}return Math.min.apply(Math,lengths)};maxChromaForLH=function(L,H){var hrad,j,l,len1,lengths,line,ref;hrad=H/360*Math.PI*2;lengths=[];ref=getBounds(L);for(j=0,len1=ref.length;j<len1;j++){line=ref[j];l=lengthOfRayUntilIntersect(hrad,line);if(l!==null){lengths.push(l)}}return Math.min.apply(Math,lengths)};dotProduct=function(a,b){var i,j,ref,ret;ret=0;for(i=j=0,ref=a.length-1;0<=ref?j<=ref:j>=ref;i=0<=ref?++j:--j){ret+=a[i]*b[i]}return ret};fromLinear=function(c){if(c<=.0031308){return 12.92*c}else{return 1.055*Math.pow(c,1/2.4)-.055}};toLinear=function(c){var a;a=.055;if(c>.04045){return Math.pow((c+a)/(1+a),2.4)}else{return c/12.92}};conv={xyz:{},luv:{},lch:{},husl:{},huslp:{},rgb:{},hex:{}};conv.xyz.rgb=function(tuple){var B,G,R;R=fromLinear(dotProduct(m.R,tuple));G=fromLinear(dotProduct(m.G,tuple));B=fromLinear(dotProduct(m.B,tuple));return[R,G,B]};conv.rgb.xyz=function(tuple){var B,G,R,X,Y,Z,rgbl;R=tuple[0],G=tuple[1],B=tuple[2];rgbl=[toLinear(R),toLinear(G),toLinear(B)];X=dotProduct(m_inv.X,rgbl);Y=dotProduct(m_inv.Y,rgbl);Z=dotProduct(m_inv.Z,rgbl);return[X,Y,Z]};Y_to_L=function(Y){if(Y<=epsilon){return Y*kappa}else{return 116*Math.pow(Y,1/3)-16}};L_to_Y=function(L){if(L<=8){return L/kappa}else{return Math.pow((L+16)/116,3)}};conv.xyz.luv=function(tuple){var L,U,V,X,Y,Z,varU,varV;X=tuple[0],Y=tuple[1],Z=tuple[2];if(Y===0){return[0,0,0]}L=Y_to_L(Y);varU=4*X/(X+15*Y+3*Z);varV=9*Y/(X+15*Y+3*Z);U=13*L*(varU-refU);V=13*L*(varV-refV);return[L,U,V]};conv.luv.xyz=function(tuple){var L,U,V,X,Y,Z,varU,varV;L=tuple[0],U=tuple[1],V=tuple[2];if(L===0){return[0,0,0]}varU=U/(13*L)+refU;varV=V/(13*L)+refV;Y=L_to_Y(L);X=0-9*Y*varU/((varU-4)*varV-varU*varV);Z=(9*Y-15*varV*Y-varV*X)/(3*varV);return[X,Y,Z]};conv.luv.lch=function(tuple){var C,H,Hrad,L,U,V;L=tuple[0],U=tuple[1],V=tuple[2];C=Math.sqrt(Math.pow(U,2)+Math.pow(V,2));if(C<1e-8){H=0}else{Hrad=Math.atan2(V,U);H=Hrad*360/2/Math.PI;if(H<0){H=360+H}}return[L,C,H]};conv.lch.luv=function(tuple){var C,H,Hrad,L,U,V;L=tuple[0],C=tuple[1],H=tuple[2];Hrad=H/360*2*Math.PI;U=Math.cos(Hrad)*C;V=Math.sin(Hrad)*C;return[L,U,V]};conv.husl.lch=function(tuple){var C,H,L,S,max;H=tuple[0],S=tuple[1],L=tuple[2];if(L>99.9999999||L<1e-8){C=0}else{max=maxChromaForLH(L,H);C=max/100*S}return[L,C,H]};conv.lch.husl=function(tuple){var C,H,L,S,max;L=tuple[0],C=tuple[1],H=tuple[2];if(L>99.9999999||L<1e-8){S=0}else{max=maxChromaForLH(L,H);S=C/max*100}return[H,S,L]};conv.huslp.lch=function(tuple){var C,H,L,S,max;H=tuple[0],S=tuple[1],L=tuple[2];if(L>99.9999999||L<1e-8){C=0}else{max=maxSafeChromaForL(L);C=max/100*S}return[L,C,H]};conv.lch.huslp=function(tuple){var C,H,L,S,max;L=tuple[0],C=tuple[1],H=tuple[2];if(L>99.9999999||L<1e-8){S=0}else{max=maxSafeChromaForL(L);S=C/max*100}return[H,S,L]};conv.rgb.hex=function(tuple){var ch,hex,j,len1;hex="#";for(j=0,len1=tuple.length;j<len1;j++){ch=tuple[j];ch=Math.round(ch*1e6)/1e6;if(ch<0||ch>1){throw new Error("Illegal rgb value: "+ch)}ch=Math.round(ch*255).toString(16);if(ch.length===1){ch="0"+ch}hex+=ch}return hex};conv.hex.rgb=function(hex){var b,g,j,len1,n,r,ref,results;if(hex.charAt(0)==="#"){hex=hex.substring(1,7)}r=hex.substring(0,2);g=hex.substring(2,4);b=hex.substring(4,6);ref=[r,g,b];results=[];for(j=0,len1=ref.length;j<len1;j++){n=ref[j];results.push(parseInt(n,16)/255)}return results};conv.lch.rgb=function(tuple){return conv.xyz.rgb(conv.luv.xyz(conv.lch.luv(tuple)))};conv.rgb.lch=function(tuple){return conv.luv.lch(conv.xyz.luv(conv.rgb.xyz(tuple)))};conv.husl.rgb=function(tuple){return conv.lch.rgb(conv.husl.lch(tuple))};conv.rgb.husl=function(tuple){return conv.lch.husl(conv.rgb.lch(tuple))};conv.huslp.rgb=function(tuple){return conv.lch.rgb(conv.huslp.lch(tuple))};conv.rgb.huslp=function(tuple){return conv.lch.huslp(conv.rgb.lch(tuple))};root={};root.fromRGB=function(R,G,B){return conv.rgb.husl([R,G,B])};root.fromHex=function(hex){return conv.rgb.husl(conv.hex.rgb(hex))};root.toRGB=function(H,S,L){return conv.husl.rgb([H,S,L])};root.toHex=function(H,S,L){return conv.rgb.hex(conv.husl.rgb([H,S,L]))};root.p={};root.p.toRGB=function(H,S,L){return conv.xyz.rgb(conv.luv.xyz(conv.lch.luv(conv.huslp.lch([H,S,L]))))};root.p.toHex=function(H,S,L){return conv.rgb.hex(conv.xyz.rgb(conv.luv.xyz(conv.lch.luv(conv.huslp.lch([H,S,L])))))};root.p.fromRGB=function(R,G,B){return conv.lch.huslp(conv.luv.lch(conv.xyz.luv(conv.rgb.xyz([R,G,B]))))};root.p.fromHex=function(hex){return conv.lch.huslp(conv.luv.lch(conv.xyz.luv(conv.rgb.xyz(conv.hex.rgb(hex)))))};root._conv=conv;root._getBounds=getBounds;root._maxChromaForLH=maxChromaForLH;root._maxSafeChromaForL=maxSafeChromaForL;if(!(typeof module!=="undefined"&&module!==null||typeof jQuery!=="undefined"&&jQuery!==null||typeof requirejs!=="undefined"&&requirejs!==null)){this.HUSL=root}if(typeof module!=="undefined"&&module!==null){module.exports=root}if(typeof jQuery!=="undefined"&&jQuery!==null){jQuery.husl=root}if(typeof requirejs!=="undefined"&&requirejs!==null&&(typeof define!=="undefined"&&define!==null)){define(root)}}).call(this);