geotiff
Version:
GeoTIFF image decoding in JavaScript
1 lines • 56.5 kB
JavaScript
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u=n(15),f=r(u),s=n(16),c=r(s),l=n(10),d=r(l),h=n(11),p=r(h),v=n(33),b=r(v),y=n(17),w=r(y),m=new Int32Array([0,1,8,16,9,2,3,10,17,24,32,25,18,11,4,5,12,19,26,33,40,48,41,34,27,20,13,6,7,14,21,28,35,42,49,56,57,50,43,36,29,22,15,23,30,37,44,51,58,59,52,45,38,31,39,46,53,60,61,54,47,55,62,63]),_=4017,g=799,k=3406,x=2276,O=1567,S=3784,E=5793,A=2896,P=function(){function e(){(0,d.default)(this,e),this.jfif=null,this.adobe=null,this.quantizationTables=[],this.huffmanTablesAC=[],this.huffmanTablesDC=[],this.resetFrames()}return(0,p.default)(e,[{key:"resetFrames",value:function(){this.frames=[]}},{key:"parse",value:function(e){function t(){var t=e[n]<<8|e[n+1];return n+=2,t}var n=0,r=t();if(65496!==r)throw new Error("SOI not found");for(r=t();65497!==r;){switch(r){case 65280:break;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 a=function(){var r=t(),o=e.subarray(n,n+r-2);return n+=o.length,o}();65504===r&&74===a[0]&&70===a[1]&&73===a[2]&&70===a[3]&&0===a[4]&&(this.jfif={version:{major:a[5],minor:a[6]},densityUnits:a[7],xDensity:a[8]<<8|a[9],yDensity:a[10]<<8|a[11],thumbWidth:a[12],thumbHeight:a[13],thumbData:a.subarray(14,14+3*a[12]*a[13])}),65518===r&&65===a[0]&&100===a[1]&&111===a[2]&&98===a[3]&&101===a[4]&&0===a[5]&&(this.adobe={version:a[6],flags0:a[7]<<8|a[8],flags1:a[9]<<8|a[10],transformCode:a[11]});break;case 65499:for(var u=t(),f=u+n-2;n<f;){var s=e[n++],c=new Int32Array(64);if(s>>4==0)for(var l=0;l<64;l++){var d=m[l];c[d]=e[n++]}else{if(s>>4!=1)throw new Error("DQT: invalid table spec");for(var h=0;h<64;h++){c[m[h]]=t()}}this.quantizationTables[15&s]=c}break;case 65472:case 65473:case 65474:t();for(var p={extended:65473===r,progressive:65474===r,precision:e[n++],scanLines:t(),samplesPerLine:t(),components:{},componentsOrder:[]},v=e[n++],b=void 0,y=0;y<v;y++){b=e[n];var 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65501:t(),this.resetInterval=t();break;case 65498:t();for(var j=e[n++],T=[],C=this.frames[0],B=0;B<j;B++){var I=C.components[e[n++]],Z=e[n++];I.huffmanTableDC=this.huffmanTablesDC[Z>>4],I.huffmanTableAC=this.huffmanTablesAC[15&Z],T.push(I)}var N=e[n++],U=e[n++],F=e[n++],R=i(e,n,C,T,this.resetInterval,N,U,F>>4,15&F);n+=R;break;case 65535:255!==e[n]&&n--;break;default:if(255===e[n-3]&&e[n-2]>=192&&e[n-2]<=254){n-=3;break}throw new Error("unknown JPEG marker "+r.toString(16))}r=t()}}},{key:"getResult",value:function(){var e=this.frames;if(0===this.frames.length)throw new Error("no frames were decoded");this.frames.length>1&&console.warn("more than one frame is not supported");for(var t=0;t<this.frames.length;t++){var n=this.frames[t].components,r=!0,o=!1,i=void 0;try{for(var u,f=Object.keys(n)[Symbol.iterator]();!(r=(u=f.next()).done);r=!0){var s=u.value;n[s].quantizationTable=this.quantizationTables[n[s].quantizationIdx],delete 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D:if(1024&n.flags){for(;h<16;){if(0===f)break e;f--,d+=o[a++]<<h,h+=8}n.length=d,n.head&&(n.head.extra_len=d),512&n.flags&&(Ae[0]=255&d,Ae[1]=d>>>8&255,n.check=_(n.check,Ae,2,0)),d=0,h=0}else n.head&&(n.head.extra=null);n.mode=z;case z:if(1024&n.flags&&(b=n.length,b>f&&(b=f),b&&(n.head&&(ke=n.head.extra_len-n.length,n.head.extra||(n.head.extra=new Array(n.head.extra_len)),w.arraySet(n.head.extra,o,a,b,ke)),512&n.flags&&(n.check=_(n.check,o,b,a)),f-=b,a+=b,n.length-=b),n.length))break e;n.length=0,n.mode=H;case H:if(2048&n.flags){if(0===f)break e;b=0;do{ke=o[a+b++],n.head&&ke&&n.length<65536&&(n.head.name+=String.fromCharCode(ke))}while(ke&&b<f);if(512&n.flags&&(n.check=_(n.check,o,b,a)),f-=b,a+=b,ke)break e}else n.head&&(n.head.name=null);n.length=0,n.mode=K;case K:if(4096&n.flags){if(0===f)break e;b=0;do{ke=o[a+b++],n.head&&ke&&n.length<65536&&(n.head.comment+=String.fromCharCode(ke))}while(ke&&b<f);if(512&n.flags&&(n.check=_(n.check,o,b,a)),f-=b,a+=b,ke)break e}else n.head&&(n.head.comment=null);n.mode=W;case W:if(512&n.flags){for(;h<16;){if(0===f)break e;f--,d+=o[a++]<<h,h+=8}if(d!==(65535&n.check)){e.msg="header crc mismatch",n.mode=de;break}d=0,h=0}n.head&&(n.head.hcrc=n.flags>>9&1,n.head.done=!0),e.adler=n.check=0,n.mode=q;break;case G:for(;h<32;){if(0===f)break e;f--,d+=o[a++]<<h,h+=8}e.adler=n.check=r(d),d=0,h=0,n.mode=Y;case Y:if(0===n.havedict)return e.next_out=u,e.avail_out=s,e.next_in=a,e.avail_in=f,n.hold=d,n.bits=h,T;e.adler=n.check=1,n.mode=q;case q:if(t===A||t===P)break e;case J:if(n.last){d>>>=7&h,h-=7&h,n.mode=se;break}for(;h<3;){if(0===f)break e;f--,d+=o[a++]<<h,h+=8}switch(n.last=1&d,d>>>=1,h-=1,3&d){case 0:n.mode=X;break;case 1:if(c(n),n.mode=ne,t===P){d>>>=2,h-=2;break e}break;case 2:n.mode=$;break;case 3:e.msg="invalid block type",n.mode=de}d>>>=2,h-=2;break;case X:for(d>>>=7&h,h-=7&h;h<32;){if(0===f)break e;f--,d+=o[a++]<<h,h+=8}if((65535&d)!=(d>>>16^65535)){e.msg="invalid stored block lengths",n.mode=de;break}if(n.length=65535&d,d=0,h=0,n.mode=V,t===P)break e;case V:n.mode=Q;case Q:if(b=n.length){if(b>f&&(b=f),b>s&&(b=s),0===b)break e;w.arraySet(i,o,a,b,u),f-=b,a+=b,s-=b,u+=b,n.length-=b;break}n.mode=q;break;case $:for(;h<14;){if(0===f)break e;f--,d+=o[a++]<<h,h+=8}if(n.nlen=257+(31&d),d>>>=5,h-=5,n.ndist=1+(31&d),d>>>=5,h-=5,n.ncode=4+(15&d),d>>>=4,h-=4,n.nlen>286||n.ndist>30){e.msg="too many length or distance symbols",n.mode=de;break}n.have=0,n.mode=ee;case ee:for(;n.have<n.ncode;){for(;h<3;){if(0===f)break e;f--,d+=o[a++]<<h,h+=8}n.lens[Pe[n.have++]]=7&d,d>>>=3,h-=3}for(;n.have<19;)n.lens[Pe[n.have++]]=0;if(n.lencode=n.lendyn,n.lenbits=7,Oe={bits:n.lenbits},xe=k(x,n.lens,0,19,n.lencode,0,n.work,Oe),n.lenbits=Oe.bits,xe){e.msg="invalid code lengths set",n.mode=de;break}n.have=0,n.mode=te;case te:for(;n.have<n.nlen+n.ndist;){for(;Ee=n.lencode[d&(1<<n.lenbits)-1],be=Ee>>>24,ye=Ee>>>16&255,we=65535&Ee,!(be<=h);){if(0===f)break e;f--,d+=o[a++]<<h,h+=8}if(we<16)d>>>=be,h-=be,n.lens[n.have++]=we;else{if(16===we){for(Se=be+2;h<Se;){if(0===f)break e;f--,d+=o[a++]<<h,h+=8}if(d>>>=be,h-=be,0===n.have){e.msg="invalid bit length repeat",n.mode=de;break}ke=n.lens[n.have-1],b=3+(3&d),d>>>=2,h-=2}else if(17===we){for(Se=be+3;h<Se;){if(0===f)break e;f--,d+=o[a++]<<h,h+=8}d>>>=be,h-=be,ke=0,b=3+(7&d),d>>>=3,h-=3}else{for(Se=be+7;h<Se;){if(0===f)break e;f--,d+=o[a++]<<h,h+=8}d>>>=be,h-=be,ke=0,b=11+(127&d),d>>>=7,h-=7}if(n.have+b>n.nlen+n.ndist){e.msg="invalid bit length repeat",n.mode=de;break}for(;b--;)n.lens[n.have++]=ke}}if(n.mode===de)break;if(0===n.lens[256]){e.msg="invalid code -- missing end-of-block",n.mode=de;break}if(n.lenbits=9,Oe={bits:n.lenbits},xe=k(O,n.lens,0,n.nlen,n.lencode,0,n.work,Oe),n.lenbits=Oe.bits,xe){e.msg="invalid literal/lengths set",n.mode=de;break}if(n.distbits=6,n.distcode=n.distdyn,Oe={bits:n.distbits},xe=k(S,n.lens,n.nlen,n.ndist,n.distcode,0,n.work,Oe),n.distbits=Oe.bits,xe){e.msg="invalid distances set",n.mode=de;break}if(n.mode=ne,t===P)break e;case ne:n.mode=re;case re:if(f>=6&&s>=258){e.next_out=u,e.avail_out=s,e.next_in=a,e.avail_in=f,n.hold=d,n.bits=h,g(e,v),u=e.next_out,i=e.output,s=e.avail_out,a=e.next_in,o=e.input,f=e.avail_in,d=n.hold,h=n.bits,n.mode===q&&(n.back=-1);break}for(n.back=0;Ee=n.lencode[d&(1<<n.lenbits)-1],be=Ee>>>24,ye=Ee>>>16&255,we=65535&Ee,!(be<=h);){if(0===f)break e;f--,d+=o[a++]<<h,h+=8}if(ye&&0==(240&ye)){for(me=be,_e=ye,ge=we;Ee=n.lencode[ge+((d&(1<<me+_e)-1)>>me)],be=Ee>>>24,ye=Ee>>>16&255,we=65535&Ee,!(me+be<=h);){if(0===f)break e;f--,d+=o[a++]<<h,h+=8}d>>>=me,h-=me,n.back+=me}if(d>>>=be,h-=be,n.back+=be,n.length=we,0===ye){n.mode=fe;break}if(32&ye){n.back=-1,n.mode=q;break}if(64&ye){e.msg="invalid literal/length code",n.mode=de;break}n.extra=15&ye,n.mode=oe;case oe:if(n.extra){for(Se=n.extra;h<Se;){if(0===f)break e;f--,d+=o[a++]<<h,h+=8}n.length+=d&(1<<n.extra)-1,d>>>=n.extra,h-=n.extra,n.back+=n.extra}n.was=n.length,n.mode=ie;case ie:for(;Ee=n.distcode[d&(1<<n.distbits)-1],be=Ee>>>24,ye=Ee>>>16&255,we=65535&Ee,!(be<=h);){if(0===f)break e;f--,d+=o[a++]<<h,h+=8}if(0==(240&ye)){for(me=be,_e=ye,ge=we;Ee=n.distcode[ge+((d&(1<<me+_e)-1)>>me)],be=Ee>>>24,ye=Ee>>>16&255,we=65535&Ee,!(me+be<=h);){if(0===f)break e;f--,d+=o[a++]<<h,h+=8}d>>>=me,h-=me,n.back+=me}if(d>>>=be,h-=be,n.back+=be,64&ye){e.msg="invalid distance code",n.mode=de;break}n.offset=we,n.extra=15&ye,n.mode=ae;case ae:if(n.extra){for(Se=n.extra;h<Se;){if(0===f)break e;f--,d+=o[a++]<<h,h+=8}n.offset+=d&(1<<n.extra)-1,d>>>=n.extra,h-=n.extra,n.back+=n.extra}if(n.offset>n.dmax){e.msg="invalid distance too far back",n.mode=de;break}n.mode=ue;case ue:if(0===s)break e;if(b=v-s,n.offset>b){if((b=n.offset-b)>n.whave&&n.sane){e.msg="invalid distance too far back",n.mode=de;break}b>n.wnext?(b-=n.wnext,y=n.wsize-b):y=n.wnext-b,b>n.length&&(b=n.length),ve=n.window}else ve=i,y=u-n.offset,b=n.length;b>s&&(b=s),s-=b,n.length-=b;do{i[u++]=ve[y++]}while(--b);0===n.length&&(n.mode=re);break;case fe:if(0===s)break e;i[u++]=n.length,s--,n.mode=re;break;case se:if(n.wrap){for(;h<32;){if(0===f)break e;f--,d|=o[a++]<<h,h+=8}if(v-=s,e.total_out+=v,n.total+=v,v&&(e.adler=n.check=n.flags?_(n.check,i,v,u-v):m(n.check,i,v,u-v)),v=s,(n.flags?d:r(d))!==n.check){e.msg="incorrect data check",n.mode=de;break}d=0,h=0}n.mode=ce;case ce:if(n.wrap&&n.flags){for(;h<32;){if(0===f)break e;f--,d+=o[a++]<<h,h+=8}if(d!==(4294967295&n.total)){e.msg="incorrect length check",n.mode=de;break}d=0,h=0}n.mode=le;case le:xe=j;break e;case de:xe=B;break e;case he:return I;case pe:default:return C}return e.next_out=u,e.avail_out=s,e.next_in=a,e.avail_in=f,n.hold=d,n.bits=h,(n.wsize||v!==e.avail_out&&n.mode<de&&(n.mode<se||t!==E))&&l(e,e.output,e.next_out,v-e.avail_out)?(n.mode=he,I):(p-=e.avail_in,v-=e.avail_out,e.total_in+=p,e.total_out+=v,n.total+=v,n.wrap&&v&&(e.adler=n.check=n.flags?_(n.check,i,v,e.next_out-v):m(n.check,i,v,e.next_out-v)),e.data_type=n.bits+(n.last?64:0)+(n.mode===q?128:0)+(n.mode===ne||n.mode===V?256:0),(0===p&&0===v||t===E)&&xe===M&&(xe=Z),xe)}function h(e){if(!e||!e.state)return C;var t=e.state;return t.window&&(t.window=null),e.state=null,M}function p(e,t){var n;return e&&e.state?(n=e.state,0==(2&n.wrap)?C:(n.head=t,t.done=!1,M)):C}function v(e,t){var n,r,o=t.length;return e&&e.state?(n=e.state,0!==n.wrap&&n.mode!==Y?C:n.mode===Y&&(r=1,(r=m(r,t,o,0))!==n.check)?B:l(e,t,o,o)?(n.mode=he,I):(n.havedict=1,M)):C}var b,y,w=n(21),m=n(104),_=n(105),g=n(106),k=n(107),x=0,O=1,S=2,E=4,A=5,P=6,M=0,j=1,T=2,C=-2,B=-3,I=-4,Z=-5,N=8,U=1,F=2,R=3,L=4,D=5,z=6,H=7,K=8,W=9,G=10,Y=11,q=12,J=13,X=14,V=15,Q=16,$=17,ee=18,te=19,ne=20,re=21,oe=22,ie=23,ae=24,ue=25,fe=26,se=27,ce=28,le=29,de=30,he=31,pe=32,ve=852,be=592,ye=15,we=!0;t.inflateReset=a,t.inflateReset2=u,t.inflateResetKeep=i,t.inflateInit=s,t.inflateInit2=f,t.inflate=d,t.inflateEnd=h,t.inflateGetHeader=p,t.inflateSetDictionary=v,t.inflateInfo="pako inflate (from Nodeca project)"},function(e,t,n){"use strict";function r(e,t,n,r){for(var o=65535&e|0,i=e>>>16&65535|0,a=0;0!==n;){a=n>2e3?2e3:n,n-=a;do{o=o+t[r++]|0,i=i+o|0}while(--a);o%=65521,i%=65521}return o|i<<16|0}e.exports=r},function(e,t,n){"use strict";function r(e,t,n,r){var i=o,a=r+n;e^=-1;for(var u=r;u<a;u++)e=e>>>8^i[255&(e^t[u])];return-1^e}var o=function(){for(var e,t=[],n=0;n<256;n++){e=n;for(var r=0;r<8;r++)e=1&e?3988292384^e>>>1:e>>>1;t[n]=e}return t}();e.exports=r},function(e,t,n){"use strict";e.exports=function(e,t){var n,r,o,i,a,u,f,s,c,l,d,h,p,v,b,y,w,m,_,g,k,x,O,S,E;n=e.state,r=e.next_in,S=e.input,o=r+(e.avail_in-5),i=e.next_out,E=e.output,a=i-(t-e.avail_out),u=i+(e.avail_out-257),f=n.dmax,s=n.wsize,c=n.whave,l=n.wnext,d=n.window,h=n.hold,p=n.bits,v=n.lencode,b=n.distcode,y=(1<<n.lenbits)-1,w=(1<<n.distbits)