hdr-canvas
Version:
HDR capable HTML canvas
1 lines • 58.7 kB
JavaScript
var HDRCanvas=function(e){"use strict";function t(e,t){let r=e.length;Array.isArray(e[0])||(e=[e]),Array.isArray(t[0])||(t=t.map((e=>[e])));let a=t[0].length,n=t[0].map(((e,r)=>t.map((e=>e[r])))),o=e.map((e=>n.map((t=>{let r=0;if(!Array.isArray(e)){for(let a of t)r+=e*a;return r}for(let a=0;a<e.length;a++)r+=e[a]*(t[a]||0);return r}))));return 1===r&&(o=o[0]),1===a?o.map((e=>e[0])):o}function r(e){return"string"===a(e)}function a(e){return(Object.prototype.toString.call(e).match(/^\[object\s+(.*?)\]$/)[1]||"").toLowerCase()}function n(e,{precision:t,unit:r}){return o(e)?"none":i(e,t)+(r??"")}function o(e){return Number.isNaN(e)||e instanceof Number&&e?.none}function s(e){return o(e)?0:e}function i(e,t){if(0===e)return 0;let r=~~e,a=0;r&&t&&(a=1+~~Math.log10(Math.abs(r)));const n=10**(t-a);return Math.floor(e*n+.5)/n}const c={deg:1,grad:.9,rad:180/Math.PI,turn:360};function l(e){if(!e)return;e=e.trim();const t=/^-?[\d.]+$/,r=/%|deg|g?rad|turn$/,a=/\/?\s*(none|[-\w.]+(?:%|deg|g?rad|turn)?)/g;let n=e.match(/^([a-z]+)\((.+?)\)$/i);if(n){let e=[];return n[2].replace(a,((a,n)=>{let o=n.match(r),s=n;if(o){let e=o[0],t=s.slice(0,-e.length);"%"===e?(s=new Number(t/100),s.type="<percentage>"):(s=new Number(t*c[e]),s.type="<angle>",s.unit=e)}else t.test(s)?(s=new Number(s),s.type="<number>"):"none"===s&&(s=new Number(NaN),s.none=!0);a.startsWith("/")&&(s=s instanceof Number?s:new Number(s),s.alpha=!0),"object"==typeof s&&s instanceof Number&&(s.raw=n),e.push(s)})),{name:n[1].toLowerCase(),rawName:n[1],rawArgs:n[2],args:e}}}function h(e){return e[e.length-1]}function u(e,t,r){return isNaN(e)?t:isNaN(t)?e:e+(t-e)*r}function d(e,t,r){return(r-e)/(t-e)}function m(e,t,r){return u(t[0],t[1],d(e[0],e[1],r))}function p(e){return e.map((e=>e.split("|").map((e=>{let t=(e=e.trim()).match(/^(<[a-z]+>)\[(-?[.\d]+),\s*(-?[.\d]+)\]?$/);if(t){let e=new String(t[1]);return e.range=[+t[2],+t[3]],e}return e}))))}function f(e,t,r){return Math.max(Math.min(r,t),e)}function g(e,t){return Math.sign(e)===Math.sign(t)?e:-e}function b(e,t){return g(Math.abs(e)**t,e)}function M(e,t){return 0===t?0:e/t}function w(e,t,r=0,a=e.length){for(;r<a;){const n=r+a>>1;e[n]<t?r=n+1:a=n}return r}var y=Object.freeze({__proto__:null,bisectLeft:w,clamp:f,copySign:g,interpolate:u,interpolateInv:d,isNone:o,isString:r,last:h,mapRange:m,multiplyMatrices:t,parseCoordGrammar:p,parseFunction:l,serializeNumber:n,skipNone:s,spow:b,toPrecision:i,type:a,zdiv:M});const C=new class{add(e,t,r){if("string"==typeof arguments[0])(Array.isArray(e)?e:[e]).forEach((function(e){this[e]=this[e]||[],t&&this[e][r?"unshift":"push"](t)}),this);else for(var e in arguments[0])this.add(e,arguments[0][e],arguments[1])}run(e,t){this[e]=this[e]||[],this[e].forEach((function(e){e.call(t&&t.context?t.context:t,t)}))}};var v={gamut_mapping:"css",precision:5,deltaE:"76",verbose:"test"!==globalThis?.process?.env?.NODE_ENV?.toLowerCase(),warn:function(e){this.verbose&&globalThis?.console?.warn?.(e)}};const R={D50:[.3457/.3585,1,.2958/.3585],D65:[.3127/.329,1,.3583/.329]};function _(e){return Array.isArray(e)?e:R[e]}function S(e,r,a,n={}){if(e=_(e),r=_(r),!e||!r)throw new TypeError(`Missing white point to convert ${e?"":"from"}${e||r?"":"/"}${r?"":"to"}`);if(e===r)return a;let o={W1:e,W2:r,XYZ:a,options:n};if(C.run("chromatic-adaptation-start",o),o.M||(o.W1===R.D65&&o.W2===R.D50?o.M=[[1.0479297925449969,.022946870601609652,-.05019226628920524],[.02962780877005599,.9904344267538799,-.017073799063418826],[-.009243040646204504,.015055191490298152,.7518742814281371]]:o.W1===R.D50&&o.W2===R.D65&&(o.M=[[.955473421488075,-.02309845494876471,.06325924320057072],[-.0283697093338637,1.0099953980813041,.021041441191917323],[.012314014864481998,-.020507649298898964,1.330365926242124]])),C.run("chromatic-adaptation-end",o),o.M)return t(o.M,o.XYZ);throw new TypeError("Only Bradford CAT with white points D50 and D65 supported for now.")}const x=new Set(["<number>","<percentage>","<angle>"]);function B(e,t,r,a){let n=Object.entries(e.coords).map((([e,n],o)=>{let s,i=t.coordGrammar[o],c=a[o],l=c?.type;if(s=c.none?i.find((e=>x.has(e))):i.find((e=>e==l)),!s){let t=n.name||e;throw new TypeError(`${l??c.raw} not allowed for ${t} in ${r}()`)}let h=s.range;"<percentage>"===l&&(h||=[0,1]);let u=n.range||n.refRange;return h&&u&&(a[o]=m(h,u,a[o])),s}));return n}function E(e,{meta:t}={}){let r={str:String(e)?.trim()};if(C.run("parse-start",r),r.color)return r.color;if(r.parsed=l(r.str),r.parsed){let e=r.parsed.name;if("color"===e){let e=r.parsed.args.shift(),a=e.startsWith("--")?e.substring(2):`--${e}`,n=[e,a],o=r.parsed.rawArgs.indexOf("/")>0?r.parsed.args.pop():1;for(let a of A.all){let s=a.getFormat("color");if(s&&(n.includes(s.id)||s.ids?.filter((e=>n.includes(e))).length)){const n=Object.keys(a.coords).map(((e,t)=>r.parsed.args[t]||0));let i;return s.coordGrammar&&(i=B(a,s,"color",n)),t&&Object.assign(t,{formatId:"color",types:i}),s.id.startsWith("--")&&!e.startsWith("--")&&v.warn(`${a.name} is a non-standard space and not currently supported in the CSS spec. Use prefixed color(${s.id}) instead of color(${e}).`),e.startsWith("--")&&!s.id.startsWith("--")&&v.warn(`${a.name} is a standard space and supported in the CSS spec. Use color(${s.id}) instead of prefixed color(${e}).`),{spaceId:a.id,coords:n,alpha:o}}}let s="",i=e in A.registry?e:a;if(i in A.registry){let e=A.registry[i].formats?.color?.id;e&&(s=`Did you mean color(${e})?`)}throw new TypeError(`Cannot parse color(${e}). `+(s||"Missing a plugin?"))}for(let a of A.all){let n=a.getFormat(e);if(n&&"function"===n.type){let o=1;(n.lastAlpha||h(r.parsed.args).alpha)&&(o=r.parsed.args.pop());let s,i=r.parsed.args;return n.coordGrammar&&(s=B(a,n,e,i)),t&&Object.assign(t,{formatId:n.name,types:s}),{spaceId:a.id,coords:i,alpha:o}}}}else for(let e of A.all)for(let a in e.formats){let n=e.formats[a];if("custom"!==n.type)continue;if(n.test&&!n.test(r.str))continue;let o=n.parse(r.str);if(o)return o.alpha??=1,t&&(t.formatId=a),o}throw new TypeError(`Could not parse ${e} as a color. Missing a plugin?`)}function L(e){if(Array.isArray(e))return e.map(L);if(!e)throw new TypeError("Empty color reference");r(e)&&(e=E(e));let t=e.space||e.spaceId;return t instanceof A||(e.space=A.get(t)),void 0===e.alpha&&(e.alpha=1),e}class A{constructor(e){this.id=e.id,this.name=e.name,this.base=e.base?A.get(e.base):null,this.aliases=e.aliases,this.base&&(this.fromBase=e.fromBase,this.toBase=e.toBase);let t=e.coords??this.base.coords;for(let e in t)"name"in t[e]||(t[e].name=e);this.coords=t;let r=e.white??this.base.white??"D65";this.white=_(r),this.formats=e.formats??{};for(let e in this.formats){let t=this.formats[e];t.type||="function",t.name||=e}this.formats.color?.id||(this.formats.color={...this.formats.color??{},id:e.cssId||this.id}),e.gamutSpace?this.gamutSpace="self"===e.gamutSpace?this:A.get(e.gamutSpace):this.isPolar?this.gamutSpace=this.base:this.gamutSpace=this,this.gamutSpace.isUnbounded&&(this.inGamut=(e,t)=>!0),this.referred=e.referred,Object.defineProperty(this,"path",{value:N(this).reverse(),writable:!1,enumerable:!0,configurable:!0}),C.run("colorspace-init-end",this)}inGamut(e,{epsilon:t=75e-6}={}){if(!this.equals(this.gamutSpace))return e=this.to(this.gamutSpace,e),this.gamutSpace.inGamut(e,{epsilon:t});let r=Object.values(this.coords);return e.every(((e,a)=>{let n=r[a];if("angle"!==n.type&&n.range){if(Number.isNaN(e))return!0;let[r,a]=n.range;return(void 0===r||e>=r-t)&&(void 0===a||e<=a+t)}return!0}))}get isUnbounded(){return Object.values(this.coords).every((e=>!("range"in e)))}get cssId(){return this.formats?.color?.id||this.id}get isPolar(){for(let e in this.coords)if("angle"===this.coords[e].type)return!0;return!1}getFormat(e){if("object"==typeof e)return e=I(e,this);let t;return t="default"===e?Object.values(this.formats)[0]:this.formats[e],t?(t=I(t,this),t):null}equals(e){return!!e&&(this===e||this.id===e||this.id===e.id)}to(e,t){if(1===arguments.length){const r=L(e);[e,t]=[r.space,r.coords]}if(e=A.get(e),this.equals(e))return t;t=t.map((e=>Number.isNaN(e)?0:e));let r,a,n=this.path,o=e.path;for(let e=0;e<n.length&&n[e].equals(o[e]);e++)r=n[e],a=e;if(!r)throw new Error(`Cannot convert between color spaces ${this} and ${e}: no connection space was found`);for(let e=n.length-1;e>a;e--)t=n[e].toBase(t);for(let e=a+1;e<o.length;e++)t=o[e].fromBase(t);return t}from(e,t){if(1===arguments.length){const r=L(e);[e,t]=[r.space,r.coords]}return(e=A.get(e)).to(this,t)}toString(){return`${this.name} (${this.id})`}getMinCoords(){let e=[];for(let t in this.coords){let r=this.coords[t],a=r.range||r.refRange;e.push(a?.min??0)}return e}static registry={};static get all(){return[...new Set(Object.values(A.registry))]}static register(e,t){if(1===arguments.length&&(e=(t=arguments[0]).id),t=this.get(t),this.registry[e]&&this.registry[e]!==t)throw new Error(`Duplicate color space registration: '${e}'`);if(this.registry[e]=t,1===arguments.length&&t.aliases)for(let e of t.aliases)this.register(e,t);return t}static get(e,...t){if(!e||e instanceof A)return e;if("string"===a(e)){let t=A.registry[e.toLowerCase()];if(!t)throw new TypeError(`No color space found with id = "${e}"`);return t}if(t.length)return A.get(...t);throw new TypeError(`${e} is not a valid color space`)}static resolveCoord(e,t){let r,n,o=a(e);if("string"===o?e.includes(".")?[r,n]=e.split("."):[r,n]=[,e]:Array.isArray(e)?[r,n]=e:(r=e.space,n=e.coordId),r=A.get(r),r||(r=t),!r)throw new TypeError(`Cannot resolve coordinate reference ${e}: No color space specified and relative references are not allowed here`);if(o=a(n),"number"===o||"string"===o&&n>=0){let e=Object.entries(r.coords)[n];if(e)return{space:r,id:e[0],index:n,...e[1]}}r=A.get(r);let s=n.toLowerCase(),i=0;for(let e in r.coords){let t=r.coords[e];if(e.toLowerCase()===s||t.name?.toLowerCase()===s)return{space:r,id:e,index:i,...t};i++}throw new TypeError(`No "${n}" coordinate found in ${r.name}. Its coordinates are: ${Object.keys(r.coords).join(", ")}`)}static DEFAULT_FORMAT={type:"functions",name:"color"}}function N(e){let t=[e];for(let r=e;r=r.base;)t.push(r);return t}function I(e,{coords:t}={}){if(e.coords&&!e.coordGrammar){e.type||="function",e.name||="color",e.coordGrammar=p(e.coords);let r=Object.entries(t).map((([t,r],a)=>{let n=e.coordGrammar[a][0],o=r.range||r.refRange,s=n.range,i="";return"<percentage>"==n?(s=[0,100],i="%"):"<angle>"==n&&(i="deg"),{fromRange:o,toRange:s,suffix:i}}));e.serializeCoords=(e,t)=>e.map(((e,a)=>{let{fromRange:o,toRange:s,suffix:i}=r[a];return o&&s&&(e=m(o,s,e)),e=n(e,{precision:t,unit:i})}))}return e}var k=new A({id:"xyz-d65",name:"XYZ D65",coords:{x:{name:"X"},y:{name:"Y"},z:{name:"Z"}},white:"D65",formats:{color:{ids:["xyz-d65","xyz"]}},aliases:["xyz"]});class P extends A{constructor(e){e.coords||(e.coords={r:{range:[0,1],name:"Red"},g:{range:[0,1],name:"Green"},b:{range:[0,1],name:"Blue"}}),e.base||(e.base=k),e.toXYZ_M&&e.fromXYZ_M&&(e.toBase??=r=>{let a=t(e.toXYZ_M,r);return this.white!==this.base.white&&(a=S(this.white,this.base.white,a)),a},e.fromBase??=r=>(r=S(this.base.white,this.white,r),t(e.fromXYZ_M,r))),e.referred??="display",super(e)}}function D(e,t){return e=L(e),!t||e.space.equals(t)?e.coords.slice():(t=A.get(t)).from(e)}function O(e,t){e=L(e);let{space:r,index:a}=A.resolveCoord(t,e.space);return D(e,r)[a]}function z(e,t,r){return e=L(e),t=A.get(t),e.coords=t.to(e.space,r),e}function j(e,t,r){if(e=L(e),2===arguments.length&&"object"===a(arguments[1])){let t=arguments[1];for(let r in t)j(e,r,t[r])}else{"function"==typeof r&&(r=r(O(e,t)));let{space:a,index:n}=A.resolveCoord(t,e.space),o=D(e,a);o[n]=r,z(e,a,o)}return e}z.returns="color",j.returns="color";var T=new A({id:"xyz-d50",name:"XYZ D50",white:"D50",base:k,fromBase:e=>S(k.white,"D50",e),toBase:e=>S("D50",k.white,e)});const H=216/24389,$=24/116,q=24389/27;let W=R.D50;var G=new A({id:"lab",name:"Lab",coords:{l:{refRange:[0,100],name:"Lightness"},a:{refRange:[-125,125]},b:{refRange:[-125,125]}},white:W,base:T,fromBase(e){let t=e.map(((e,t)=>e/W[t])).map((e=>e>H?Math.cbrt(e):(q*e+16)/116));return[116*t[1]-16,500*(t[0]-t[1]),200*(t[1]-t[2])]},toBase(e){let t=[];return t[1]=(e[0]+16)/116,t[0]=e[1]/500+t[1],t[2]=t[1]-e[2]/200,[t[0]>$?Math.pow(t[0],3):(116*t[0]-16)/q,e[0]>8?Math.pow((e[0]+16)/116,3):e[0]/q,t[2]>$?Math.pow(t[2],3):(116*t[2]-16)/q].map(((e,t)=>e*W[t]))},formats:{lab:{coords:["<number> | <percentage>","<number> | <percentage>[-1,1]","<number> | <percentage>[-1,1]"]}}});function F(e){return(e%360+360)%360}var X=new A({id:"lch",name:"LCH",coords:{l:{refRange:[0,100],name:"Lightness"},c:{refRange:[0,150],name:"Chroma"},h:{refRange:[0,360],type:"angle",name:"Hue"}},base:G,fromBase(e){let t,[r,a,n]=e;return t=Math.abs(a)<.02&&Math.abs(n)<.02?NaN:180*Math.atan2(n,a)/Math.PI,[r,Math.sqrt(a**2+n**2),F(t)]},toBase(e){let[t,r,a]=e;return r<0&&(r=0),isNaN(a)&&(a=0),[t,r*Math.cos(a*Math.PI/180),r*Math.sin(a*Math.PI/180)]},formats:{lch:{coords:["<number> | <percentage>","<number> | <percentage>","<number> | <angle>"]}}});const Y=25**7,Z=Math.PI,U=180/Z,J=Z/180;function Q(e){const t=e*e;return t*t*t*e}function K(e,t,{kL:r=1,kC:a=1,kH:n=1}={}){[e,t]=L([e,t]);let[o,s,i]=G.from(e),c=X.from(G,[o,s,i])[1],[l,h,u]=G.from(t),d=X.from(G,[l,h,u])[1];c<0&&(c=0),d<0&&(d=0);let m=Q((c+d)/2),p=.5*(1-Math.sqrt(m/(m+Y))),f=(1+p)*s,g=(1+p)*h,b=Math.sqrt(f**2+i**2),M=Math.sqrt(g**2+u**2),w=0===f&&0===i?0:Math.atan2(i,f),y=0===g&&0===u?0:Math.atan2(u,g);w<0&&(w+=2*Z),y<0&&(y+=2*Z),w*=U,y*=U;let C,R=l-o,_=M-b,S=y-w,x=w+y,B=Math.abs(S);b*M==0?C=0:B<=180?C=S:S>180?C=S-360:S<-180?C=S+360:v.warn("the unthinkable has happened");let E,A=2*Math.sqrt(M*b)*Math.sin(C*J/2),N=(o+l)/2,I=(b+M)/2,k=Q(I);E=b*M==0?x:B<=180?x/2:x<360?(x+360)/2:(x-360)/2;let P=(N-50)**2,D=1+.015*P/Math.sqrt(20+P),O=1+.045*I,z=1;z-=.17*Math.cos((E-30)*J),z+=.24*Math.cos(2*E*J),z+=.32*Math.cos((3*E+6)*J),z-=.2*Math.cos((4*E-63)*J);let j=1+.015*I*z,T=30*Math.exp(-1*((E-275)/25)**2),H=2*Math.sqrt(k/(k+Y)),$=(R/(r*D))**2;return $+=(_/(a*O))**2,$+=(A/(n*j))**2,$+=-1*Math.sin(2*T*J)*H*(_/(a*O))*(A/(n*j)),Math.sqrt($)}const V=[[.819022437996703,.3619062600528904,-.1288737815209879],[.0329836539323885,.9292868615863434,.0361446663506424],[.0481771893596242,.2642395317527308,.6335478284694309]],ee=[[1.2268798758459243,-.5578149944602171,.2813910456659647],[-.0405757452148008,1.112286803280317,-.0717110580655164],[-.0763729366746601,-.4214933324022432,1.5869240198367816]],te=[[.210454268309314,.7936177747023054,-.0040720430116193],[1.9779985324311684,-2.42859224204858,.450593709617411],[.0259040424655478,.7827717124575296,-.8086757549230774]],re=[[1,.3963377773761749,.2158037573099136],[1,-.1055613458156586,-.0638541728258133],[1,-.0894841775298119,-1.2914855480194092]];var ae=new A({id:"oklab",name:"Oklab",coords:{l:{refRange:[0,1],name:"Lightness"},a:{refRange:[-.4,.4]},b:{refRange:[-.4,.4]}},white:"D65",base:k,fromBase(e){let r=t(V,e).map((e=>Math.cbrt(e)));return t(te,r)},toBase(e){let r=t(re,e).map((e=>e**3));return t(ee,r)},formats:{oklab:{coords:["<percentage> | <number>","<number> | 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