mirror of
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2 lines
6.1 KiB
JavaScript
2 lines
6.1 KiB
JavaScript
if(!t)var t={map:function(t,r){var n={};return r?t.map(function(t,o){return n.index=o,r.call(n,t)}):t.slice()},naturalOrder:function(t,r){return t<r?-1:t>r?1:0},sum:function(t,r){var n={};return t.reduce(r?function(t,o,e){return n.index=e,t+r.call(n,o)}:function(t,r){return t+r},0)},max:function(r,n){return Math.max.apply(null,n?t.map(r,n):r)}};var r=function(){var r=5,n=8-r,o=1e3;function e(t,n,o){return(t<<2*r)+(n<<r)+o}function u(t){var r=[],n=!1;function o(){r.sort(t),n=!0}return{push:function(t){r.push(t),n=!1},peek:function(t){return n||o(),void 0===t&&(t=r.length-1),r[t]},pop:function(){return n||o(),r.pop()},size:function(){return r.length},map:function(t){return r.map(t)},debug:function(){return n||o(),r}}}function a(t,r,n,o,e,u,a){var i=this;i.r1=t,i.r2=r,i.g1=n,i.g2=o,i.b1=e,i.b2=u,i.histo=a}function i(){this.vboxes=new u(function(r,n){return t.naturalOrder(r.vbox.count()*r.vbox.volume(),n.vbox.count()*n.vbox.volume())})}function c(r,n){if(n.count()){var o=n.r2-n.r1+1,u=n.g2-n.g1+1,a=t.max([o,u,n.b2-n.b1+1]);if(1==n.count())return[n.copy()];var i,c,f,s,h=0,v=[],l=[];if(a==o)for(i=n.r1;i<=n.r2;i++){for(s=0,c=n.g1;c<=n.g2;c++)for(f=n.b1;f<=n.b2;f++)s+=r[e(i,c,f)]||0;v[i]=h+=s}else if(a==u)for(i=n.g1;i<=n.g2;i++){for(s=0,c=n.r1;c<=n.r2;c++)for(f=n.b1;f<=n.b2;f++)s+=r[e(c,i,f)]||0;v[i]=h+=s}else for(i=n.b1;i<=n.b2;i++){for(s=0,c=n.r1;c<=n.r2;c++)for(f=n.g1;f<=n.g2;f++)s+=r[e(c,f,i)]||0;v[i]=h+=s}return v.forEach(function(t,r){l[r]=h-t}),function(t){var r,o,e,u,a,c=t+"1",f=t+"2",s=0;for(i=n[c];i<=n[f];i++)if(v[i]>h/2){for(e=n.copy(),u=n.copy(),a=(r=i-n[c])<=(o=n[f]-i)?Math.min(n[f]-1,~~(i+o/2)):Math.max(n[c],~~(i-1-r/2));!v[a];)a++;for(s=l[a];!s&&v[a-1];)s=l[--a];return e[f]=a,u[c]=e[f]+1,[e,u]}}(a==o?"r":a==u?"g":"b")}}return a.prototype={volume:function(t){var r=this;return r._volume&&!t||(r._volume=(r.r2-r.r1+1)*(r.g2-r.g1+1)*(r.b2-r.b1+1)),r._volume},count:function(t){var r=this,n=r.histo;if(!r._count_set||t){var o,u,a,i=0;for(o=r.r1;o<=r.r2;o++)for(u=r.g1;u<=r.g2;u++)for(a=r.b1;a<=r.b2;a++)i+=n[e(o,u,a)]||0;r._count=i,r._count_set=!0}return r._count},copy:function(){var t=this;return new a(t.r1,t.r2,t.g1,t.g2,t.b1,t.b2,t.histo)},avg:function(t){var n=this,o=n.histo;if(!n._avg||t){var u,a,i,c,f=0,s=1<<8-r,h=0,v=0,l=0;for(a=n.r1;a<=n.r2;a++)for(i=n.g1;i<=n.g2;i++)for(c=n.b1;c<=n.b2;c++)f+=u=o[e(a,i,c)]||0,h+=u*(a+.5)*s,v+=u*(i+.5)*s,l+=u*(c+.5)*s;n._avg=f?[~~(h/f),~~(v/f),~~(l/f)]:[~~(s*(n.r1+n.r2+1)/2),~~(s*(n.g1+n.g2+1)/2),~~(s*(n.b1+n.b2+1)/2)]}return n._avg},contains:function(t){var r=this,o=t[0]>>n;return gval=t[1]>>n,bval=t[2]>>n,o>=r.r1&&o<=r.r2&&gval>=r.g1&&gval<=r.g2&&bval>=r.b1&&bval<=r.b2}},i.prototype={push:function(t){this.vboxes.push({vbox:t,color:t.avg()})},palette:function(){return this.vboxes.map(function(t){return t.color})},size:function(){return this.vboxes.size()},map:function(t){for(var r=this.vboxes,n=0;n<r.size();n++)if(r.peek(n).vbox.contains(t))return r.peek(n).color;return this.nearest(t)},nearest:function(t){for(var r,n,o,e=this.vboxes,u=0;u<e.size();u++)((n=Math.sqrt(Math.pow(t[0]-e.peek(u).color[0],2)+Math.pow(t[1]-e.peek(u).color[1],2)+Math.pow(t[2]-e.peek(u).color[2],2)))<r||void 0===r)&&(r=n,o=e.peek(u).color);return o},forcebw:function(){var r=this.vboxes;r.sort(function(r,n){return t.naturalOrder(t.sum(r.color),t.sum(n.color))});var n=r[0].color;n[0]<5&&n[1]<5&&n[2]<5&&(r[0].color=[0,0,0]);var o=r.length-1,e=r[o].color;e[0]>251&&e[1]>251&&e[2]>251&&(r[o].color=[255,255,255])}},{quantize:function(f,s){if(!f.length||s<2||s>256)return!1;var h=function(t){var o,u=new Array(1<<3*r);return t.forEach(function(t){o=e(t[0]>>n,t[1]>>n,t[2]>>n),u[o]=(u[o]||0)+1}),u}(f);h.forEach(function(){});var v=function(t,r){var o,e,u,i=1e6,c=0,f=1e6,s=0,h=1e6,v=0;return t.forEach(function(t){(o=t[0]>>n)<i?i=o:o>c&&(c=o),(e=t[1]>>n)<f?f=e:e>s&&(s=e),(u=t[2]>>n)<h?h=u:u>v&&(v=u)}),new a(i,c,f,s,h,v,r)}(f,h),l=new u(function(r,n){return t.naturalOrder(r.count(),n.count())});function g(t,r){for(var n,e=t.size(),u=0;u<o;){if(e>=r)return;if(u++>o)return;if((n=t.pop()).count()){var a=c(h,n),i=a[0],f=a[1];if(!i)return;t.push(i),f&&(t.push(f),e++)}else t.push(n),u++}}l.push(v),g(l,.75*s);for(var p=new u(function(r,n){return t.naturalOrder(r.count()*r.volume(),n.count()*n.volume())});l.size();)p.push(l.pop());g(p,s);for(var b=new i;p.size();)b.push(p.pop());return b}}}().quantize,n=function(t){this.canvas=document.createElement("canvas"),this.context=this.canvas.getContext("2d"),this.width=this.canvas.width=t.naturalWidth,this.height=this.canvas.height=t.naturalHeight,this.context.drawImage(t,0,0,this.width,this.height)};n.prototype.getImageData=function(){return this.context.getImageData(0,0,this.width,this.height)};var o=function(){};o.prototype.getColor=function(t,r){return void 0===r&&(r=10),this.getPalette(t,5,r)[0]},o.prototype.getPalette=function(t,o,e){var u=function(t){var r=t.colorCount,n=t.quality;if(void 0!==r&&Number.isInteger(r)){if(1===r)throw new Error("colorCount should be between 2 and 20. To get one color, call getColor() instead of getPalette()");r=Math.max(r,2),r=Math.min(r,20)}else r=10;return(void 0===n||!Number.isInteger(n)||n<1)&&(n=10),{colorCount:r,quality:n}}({colorCount:o,quality:e}),a=new n(t),i=function(t,r,n){for(var o,e,u,a,i,c=t,f=[],s=0;s<r;s+=n)e=c[0+(o=4*s)],u=c[o+1],a=c[o+2],(void 0===(i=c[o+3])||i>=125)&&(e>250&&u>250&&a>250||f.push([e,u,a]));return f}(a.getImageData().data,a.width*a.height,u.quality),c=r(i,u.colorCount);return c?c.palette():null},o.prototype.getColorFromUrl=function(t,r,n){var o=this,e=document.createElement("img");e.addEventListener("load",function(){var u=o.getPalette(e,5,n);r(u[0],t)}),e.src=t},o.prototype.getImageData=function(t,r){var n=new XMLHttpRequest;n.open("GET",t,!0),n.responseType="arraybuffer",n.onload=function(){if(200==this.status){var t=new Uint8Array(this.response);i=t.length;for(var n=new Array(i),o=0;o<t.length;o++)n[o]=String.fromCharCode(t[o]);var e=n.join(""),u=window.btoa(e);r("data:image/png;base64,"+u)}},n.send()},o.prototype.getColorAsync=function(t,r,n){var o=this;this.getImageData(t,function(t){var e=document.createElement("img");e.addEventListener("load",function(){var t=o.getPalette(e,5,n);r(t[0],this)}),e.src=t})};export{o as default};
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