modified-dicom-pacs/public/888.min.worker.js

A modified version of DICOM PACS implementation

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p(e){return e<=0?0:e>=255?255:0|e}return f.prototype={load:function(e){var n=function(e){this.parse(e),this.onload&&this.onload()}.bind(this);if(e.indexOf("data:")>-1){for(var r=e.indexOf("base64,")+7,o=atob(e.substring(r)),a=new Uint8Array(o.length),t=o.length-1;t>=0;t--)a[t]=o.charCodeAt(t);n(o)}else{var s=new XMLHttpRequest;s.open("GET",e,!0),s.responseType="arraybuffer",s.onload=function(){var e=new Uint8Array(s.response);n(e)}.bind(this),s.send(null)}},parse:function(n){function o(){var e=n[c]<<8|n[c+1];return c+=2,e}function a(){var e=o(),r=n.subarray(c,c+e-2);return c+=r.length,r}function t(e){for(var n=Math.ceil(e.samplesPerLine/8/e.maxH),r=Math.ceil(e.scanLines/8/e.maxV),o=0;o<e.components.length;o++){J=e.components[o];var a=Math.ceil(Math.ceil(e.samplesPerLine/8)*J.h/e.maxH),t=Math.ceil(Math.ceil(e.scanLines/8)*J.v/e.maxV),s=n*J.h,i=64*(r*J.v)*(s+1);J.blockData=new Int16Array(i),J.blocksPerLine=a,J.blocksPerColumn=t}e.mcusPerLine=n,e.mcusPerColumn=r}var s,i,c=0,l=(n.length,null),f=null,h=[],v=[],p=[],d=o();if(65496!=d)throw"SOI not found";for(d=o();65497!=d;){var k,w;switch(d){case 65504:case 65505:case 65506:case 65507:case 65508:case 65509:case 65510:case 65511:case 65512:case 65513:case 65514:case 65515:case 65516:case 65517:case 65518:case 65519:case 65534:var C=a();65504===d&&74===C[0]&&70===C[1]&&73===C[2]&&70===C[3]&&0===C[4]&&(l={version:{major:C[5],minor:C[6]},densityUnits:C[7],xDensity:C[8]<<8|C[9],yDensity:C[10]<<8|C[11],thumbWidth:C[12],thumbHeight:C[13],thumbData:C.subarray(14,14+3*C[12]*C[13])}),65518===d&&65===C[0]&&100===C[1]&&111===C[2]&&98===C[3]&&101===C[4]&&0===C[5]&&(f={version:C[6],flags0:C[7]<<8|C[8],flags1:C[9]<<8|C[10],transformCode:C[11]});break;case 65499:for(var P=o()+c-2;c<P;){var g=n[c++],y=new Int32Array(64);if(g>>4==0)for(k=0;k<64;k++){y[e[k]]=n[c++]}else{if(g>>4!=1)throw"DQT: invalid table spec";for(k=0;k<64;k++){y[e[k]]=o()}}h[15&g]=y}break;case 65472:case 65473:case 65474:if(s)throw"Only single frame JPEGs supported";o(),(s={}).extended=65473===d,s.progressive=65474===d,s.precision=n[c++],s.scanLines=o(),s.samplesPerLine=o(),s.components=[],s.componentIds={};var D,L=n[c++],x=0,T=0;for(E=0;E<L;E++){D=n[c];var A=n[c+1]>>4,U=15&n[c+1];x<A&&(x=A),T<U&&(T=U);var I=n[c+2];w=s.components.push({h:A,v:U,quantizationTable:h[I],quantizationTableId:I,bitConversion:255/((1<<s.precision)-1)}),s.componentIds[D]=w-1,c+=3}s.maxH=x,s.maxV=T,t(s);break;case 65476:var q=o();for(E=2;E<q;){var G=n[c++],M=new Uint8Array(16),z=0;for(k=0;k<16;k++,c++)z+=M[k]=n[c];var H=new Uint8Array(z);for(k=0;k<z;k++,c++)H[k]=n[c];E+=17+z,(G>>4==0?p:v)[15&G]=u(M,H)}break;case 65501:o(),i=o();break;case 65498:o();var R=n[c++],V=[];for(E=0;E<R;E++){var Y=s.componentIds[n[c++]];J=s.components[Y];var B=n[c++];J.huffmanTableDC=p[B>>4],J.huffmanTableAC=v[15&B],V.push(J)}var O=n[c++],X=n[c++],_=n[c++],j=b(n,c,s,V,i,O,X,_>>4,15&_);c+=j;break;case 65535:255!==n[c]&&c--;break;default:if(255==n[c-3]&&n[c-2]>=192&&n[c-2]<=254){c-=3;break}throw"unknown JPEG marker "+d.toString(16)}d=o()}switch(this.width=s.samplesPerLine,this.height=s.scanLines,this.jfif=l,this.adobe=f,this.components=[],s.components.length){case 1:this.colorspace=r.Grayscale;break;case 3:this.adobe?this.colorspace=r.AdobeRGB:this.colorspace=r.RGB;break;case 4:this.colorspace=r.CYMK;break;default:this.colorspace=r.Unknown}for(var E=0;E<s.components.length;E++){var J;(J=s.components[E]).quantizationTable||null===J.quantizationTableId||(J.quantizationTable=h[J.quantizationTableId]),this.components.push({output:m(0,J),scaleX:J.h/s.maxH,scaleY:J.v/s.maxV,blocksPerLine:J.blocksPerLine,blocksPerColumn:J.blocksPerColumn,bitConversion:J.bitConversion})}},getData16:function(e,n){if(1!==this.components.length)throw"Unsupported color mode";var r,o,a,t,s,i,c=this.width/e,l=this.height/n,f=0,u=this.components.length,b=new Uint16Array(e*n*u),v=new Uint16Array((this.components[0].blocksPerLine<<3)*this.components[0].blocksPerColumn*8);for(i=0;i<u;i++){for(var m,p,d,k=(r=this.components[i]).blocksPerLine,w=r.blocksPerColumn,C=k<<3,P=0,g=0;g<w;g++)for(var y=g<<3,D=0;D<k;D++){var L=h(r,g,D),x=(f=0,D<<3);for(m=0;m<8;m++){P=(y+m)*C;for(p=0;p<8;p++)v[P+x+p]=r.output[L+f++]}}for(o=r.scaleX*c,a=r.scaleY*l,f=i,s=0;s<n;s++)for(t=0;t<e;t++)d=(0|s*a)*C+(0|t*o),b[f]=v[d],f+=u}return b},getData:function(e,n){var r,o,a,t,s,i,c,l,f,u,b,v,m,d,k,w=this.width/e,C=this.height/n,P=0,g=this.components.length,y=e*n*g,D=new Uint8Array(y),L=new Uint8Array((this.components[0].blocksPerLine<<3)*this.components[0].blocksPerColumn*8);for(i=0;i<g;i++){for(var x,T,A,U=(r=this.components[i]).blocksPerLine,I=r.blocksPerColumn,q=U<<3,G=0,M=0;M<I;M++)for(var z=M<<3,H=0;H<U;H++){var R=h(r,M,H),V=(P=0,H<<3);for(x=0;x<8;x++){G=(z+x)*q;for(T=0;T<8;T++)L[G+V+T]=r.output[R+P++]*r.bitConversion}}for(o=r.scaleX*w,a=r.scaleY*C,P=i,s=0;s<n;s++)for(t=0;t<e;t++)A=(0|s*a)*q+(0|t*o),D[P]=L[A],P+=g}switch(g){case 1:case 2:break;case 3:if(k=!0,this.adobe&&this.adobe.transformCode?k=!0:void 0!==this.colorTransform&&(k=!!this.colorTransform),k)for(i=0;i<y;i+=g)c=D[i],l=D[i+1],v=p(c-179.456+1.402*(f=D[i+2])),m=p(c+135.459-.344*l-.714*f),d=p(c-226.816+1.772*l),D[i]=v,D[i+1]=m,D[i+2]=d;break;case 4:if(!this.adobe)throw"Unsupported color mode (4 components)";if(k=!1,this.adobe&&this.adobe.transformCode?k=!0:void 0!==this.colorTransform&&(k=!!this.colorTransform),k)for(i=0;i<y;i+=g)c=D[i],l=D[i+1],u=p(434.456-c-1.402*(f=D[i+2])),b=p(119.541-c+.344*l+.714*f),c=p(481.816-c-1.772*l),D[i]=u,D[i+1]=b,D[i+2]=c;break;default:throw"Unsupported color mode"}return D}},f}();e.exports={JpegImage:o}}}]);
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