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4 lines
70 KiB
JavaScript
4 lines
70 KiB
JavaScript
2 weeks ago
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/* Copyright 2015-2021 Esri. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 @preserve */r={defaultNoDataValue:-34027999387901484e22,decode:function(e,t){var a=(t=t||{}).encodedMaskData||null===t.encodedMaskData,l=o(e,t.inputOffset||0,a),f=null!==t.noDataValue?t.noDataValue:r.defaultNoDataValue,h=n(l,t.pixelType||Float32Array,t.encodedMaskData,f,t.returnMask),d={width:l.width,height:l.height,pixelData:h.resultPixels,minValue:h.minValue,maxValue:l.pixels.maxValue,noDataValue:f};return h.resultMask&&(d.maskData=h.resultMask),t.returnEncodedMask&&l.mask&&(d.encodedMaskData=l.mask.bitset?l.mask.bitset:null),t.returnFileInfo&&(d.fileInfo=i(l),t.computeUsedBitDepths&&(d.fileInfo.bitDepths=s(l))),d}},n=function(e,t,a,r,n){var i,s,o,f=0,h=e.pixels.numBlocksX,d=e.pixels.numBlocksY,u=Math.floor(e.width/h),c=Math.floor(e.height/d),_=2*e.maxZError,p=Number.MAX_VALUE;a=a||(e.mask?e.mask.bitset:null),s=new t(e.width*e.height),n&&a&&(o=new Uint8Array(e.width*e.height));for(var m,w,g=new Float32Array(u*c),b=0;b<=d;b++){var v=b!==d?c:e.height%d;if(0!==v)for(var k=0;k<=h;k++){var y=k!==h?u:e.width%h;if(0!==y){var x,A,U,z,I=b*e.width*c+k*u,D=e.width-y,S=e.pixels.blocks[f];if(S.encoding<2?(0===S.encoding?x=S.rawData:(l(S.stuffedData,S.bitsPerPixel,S.numValidPixels,S.offset,_,g,e.pixels.maxValue),x=g),A=0):U=2===S.encoding?0:S.offset,a)for(w=0;w<v;w++){for(7&I&&(z=a[I>>3],z<<=7&I),m=0;m<y;m++)7&I||(z=a[I>>3]),128&z?(o&&(o[I]=1),p=p>(i=S.encoding<2?x[A++]:U)?i:p,s[I++]=i):(o&&(o[I]=0),s[I++]=r),z<<=1;I+=D}else if(S.encoding<2)for(w=0;w<v;w++){for(m=0;m<y;m++)p=p>(i=x[A++])?i:p,s[I++]=i;I+=D}else for(p=p>U?U:p,w=0;w<v;w++){for(m=0;m<y;m++)s[I++]=U;I+=D}if(1===S.encoding&&A!==S.numValidPixels)throw"Block and Mask do not match";f++}}}return{resultPixels:s,resultMask:o,minValue:p}},i=function(e){return{fileIdentifierString:e.fileIdentifierString,fileVersion:e.fileVersion,imageType:e.imageType,height:e.height,width:e.width,maxZError:e.maxZError,eofOffset:e.eofOffset,mask:e.mask?{numBlocksX:e.mask.numBlocksX,numBlocksY:e.mask.numBlocksY,numBytes:e.mask.numBytes,maxValue:e.mask.maxValue}:null,pixels:{numBlocksX:e.pixels.numBlocksX,numBlocksY:e.pixels.numBlocksY,numBytes:e.pixels.numBytes,maxValue:e.pixels.maxValue,noDataValue:e.noDataValue}}},s=function(e){for(var t=e.pixels.numBlocksX*e.pixels.numBlocksY,a={},r=0;r<t;r++){var n=e.pixels.blocks[r];0===n.encoding?a.float32=!0:1===n.encoding?a[n.bitsPerPixel]=!0:a[0]=!0}return Object.keys(a)},o=function(e,t,a){var r={},n=new Uint8Array(e,t,10);if(r.fileIdentifierString=String.fromCharCode.apply(null,n),"CntZImage"!==r.fileIdentifierString.trim())throw"Unexpected file identifier string: "+r.fileIdentifierString;t+=10;var i=new DataView(e,t,24);if(r.fileVersion=i.getInt32(0,!0),r.imageType=i.getInt32(4,!0),r.height=i.getUint32(8,!0),r.width=i.getUint32(12,!0),r.maxZError=i.getFloat64(16,!0),t+=24,!a)if(i=new DataView(e,t,16),r.mask={},r.mask.numBlocksY=i.getUint32(0,!0),r.mask.numBlocksX=i.getUint32(4,!0),r.mask.numBytes=i.getUint32(8,!0),r.mask.maxValue=i.getFloat32(12,!0),t+=16,r.mask.numBytes>0){var s=new Uint8Array(Math.ceil(r.width*r.height/8)),o=(i=new DataView(e,t,r.mask.numBytes)).getInt16(0,!0),l=2,f=0;do{if(o>0)for(;o--;)s[f++]=i.getUint8(l++);else{var h=i.getUint8(l++);for(o=-o;o--;)s[f++]=h}o=i.getInt16(l,!0),l+=2}while(l<r.mask.numBytes);if(-32768!==o||f<s.length)throw"Unexpected end of mask RLE encoding";r.mask.bitset=s,t+=r.mask.numBytes}else 0==(r.mask.numBytes|r.mask.numBlocksY|r.mask.maxValue)&&(r.mask.bitset=new Uint8Array(Math.ceil(r.width*r.height/8)));i=new DataView(e,t,16),r.pixels={},r.pixels.numBlocksY=i.getUint32(0,!0),r.pixels.numBlocksX=i.getUint32(4,!0),r.pixels.numBytes=i.getUint32(8,!0),r.pixels.maxValue=i.getFloat32(12,!0),t+=16;var d=r.pixels.numBlocksX,u=r.pixels.numBlocksY,c=d+(r.width%d>0?1:0),_=u+(r.height%u>0?1:0);r.pixels.blocks=new Array(c*_);for(var p=0,m=0;m<_;m++)for(var w=0;w<c;w++){var g=0,b=e.byt
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