geotiff
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GeoTIFF image decoding in JavaScript
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JavaScript
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vA=function(){function A(I,g,B,C,Q,E){f(this,A),this.fileDirectory=I,this.geoKeys=g,this.dataView=B,this.littleEndian=C,this.tiles=Q?{}:null,this.isTiled=!I.StripOffsets;var i=I.PlanarConfiguration;if(this.planarConfiguration=void 0===i?1:i,1!==this.planarConfiguration&&2!==this.planarConfiguration)throw new Error("Invalid planar configuration.");this.source=E}var I,g,B,C;return r(A,[{key:"getFileDirectory",value:function(){return this.fileDirectory}},{key:"getGeoKeys",value:function(){return this.geoKeys}},{key:"getWidth",value:function(){return this.fileDirectory.ImageWidth}},{key:"getHeight",value:function(){return this.fileDirectory.ImageLength}},{key:"getSamplesPerPixel",value:function(){return void 0!==this.fileDirectory.SamplesPerPixel?this.fileDirectory.SamplesPerPixel:1}},{key:"getTileWidth",value:function(){return this.isTiled?this.fileDirectory.TileWidth:this.getWidth()}},{key:"getTileHeight",value:function(){return this.isTiled?this.fileDirectory.TileLength:void 0!==this.fileDirectory.RowsPerStrip?Math.min(this.fileDirectory.RowsPerStrip,this.getHeight()):this.getHeight()}},{key:"getBlockWidth",value:function(){return this.getTileWidth()}},{key:"getBlockHeight",value:function(A){return this.isTiled||(A+1)*this.getTileHeight()<=this.getHeight()?this.getTileHeight():this.getHeight()-A*this.getTileHeight()}},{key:"getBytesPerPixel",value:function(){for(var A=0,I=0;I<this.fileDirectory.BitsPerSample.length;++I)A+=this.getSampleByteSize(I);return A}},{key:"getSampleByteSize",value:function(A){if(A>=this.fileDirectory.BitsPerSample.length)throw new RangeError("Sample index ".concat(A," is out of range."));return Math.ceil(this.fileDirectory.BitsPerSample[A]/8)}},{key:"getReaderForSample",value:function(A){var I=this.fileDirectory.SampleFormat?this.fileDirectory.SampleFormat[A]:1,g=this.fileDirectory.BitsPerSample[A];switch(I){case 1:if(g<=8)return DataView.prototype.getUint8;if(g<=16)return DataView.prototype.getUint16;if(g<=32)return DataView.prototype.getUint32;break;case 2:if(g<=8)return DataView.prototype.getInt8;if(g<=16)return DataView.prototype.getInt16;if(g<=32)return DataView.prototype.getInt32;break;case 3:switch(g){case 16:return function(A,I){return Z(this,A,I)};case 32:return DataView.prototype.getFloat32;case 64:return DataView.prototype.getFloat64}}throw Error("Unsupported data format/bitsPerSample")}},{key:"getSampleFormat",value:function(){var A=arguments.length>0&&void 0!==arguments[0]?arguments[0]:0;return this.fileDirectory.SampleFormat?this.fileDirectory.SampleFormat[A]:1}},{key:"getBitsPerSample",value:function(){var A=arguments.length>0&&void 0!==arguments[0]?arguments[0]:0;return this.fileDirectory.BitsPerSample[A]}},{key:"getArrayForSample",value:function(A,I){return mA(this.getSampleFormat(A),this.getBitsPerSample(A),I)}},{key:"getTileOrStrip",value:(C=e(l.mark((function A(I,g,B,C,Q){var E,i,t,r,o,a,n,s,h,c,D,w=this;return l.wrap((function(A){for(;;)switch(A.prev=A.next){case 0:if(E=Math.ceil(this.getWidth()/this.getTileWidth()),i=Math.ceil(this.getHeight()/this.getTileHeight()),r=this.tiles,1===this.planarConfiguration?t=g*E+I:2===this.planarConfiguration&&(t=B*E*i+g*E+I),this.isTiled?(o=this.fileDirectory.TileOffsets[t],a=this.fileDirectory.TileByteCounts[t]):(o=this.fileDirectory.StripOffsets[t],a=this.fileDirectory.StripByteCounts[t]),0!==a){A.next=12;break}return n=this.getBlockHeight(g)*this.getTileWidth(),s=2===this.planarConfiguration?this.getSampleByteSize(B):this.getBytesPerPixel(),h=new ArrayBuffer(n*s),this.getArrayForSample(B,h).fill(this.getGDALNoData()||0),A.abrupt("return",{x:I,y:g,sample:B,data:h});case 12:return A.next=14,this.source.fetch([{offset:o,length:a}],Q);case 14:return c=A.sent[0],null!==r&&r[t]?D=r[t]:(D=e(l.mark((function A(){var I,B,Q;return l.wrap((function(A){for(;;)switch(A.prev=A.next){case 0:return A.next=2,C.decode(w.fileDirectory,c);case 2:return 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0;C?(R=(G+t-I[1])*w*g.length+(k+s-I[0])*g.length+E,B[R]=d):(R=(G+t-I[1])*w+k+s-I[0],B[E][R]=d)}}));G.push(e)},L=0;L<g.length;++L)R(L);return A.next=18,Promise.all(G);case 18:if(!(E&&I[2]-I[0]!==E||i&&I[3]-I[1]!==i)){A.next=23;break}return(U=C?MA(B,I[2]-I[0],I[3]-I[1],E,i,g.length,e):YA(B,I[2]-I[0],I[3]-I[1],E,i,e)).width=E,U.height=i,A.abrupt("return",U);case 23:return B.width=E||I[2]-I[0],B.height=i||I[3]-I[1],A.abrupt("return",B);case 26:case"end":return A.stop()}}),A,this)}))),function(A,I,g,C,Q,E,i,e,t){return B.apply(this,arguments)})},{key:"readRasters",value:(g=e(l.mark((function A(){var I,g,B,C,Q,E,i,e,t,r,o,a,n,s,h,c,D,w,y,f,u,S,G,N,k,F,d=arguments;return l.wrap((function(A){for(;;)switch(A.prev=A.next){case 0:if(I=d.length>0&&void 0!==d[0]?d[0]:{},g=I.window,B=I.samples,C=void 0===B?[]:B,Q=I.interleave,E=I.pool,i=void 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