@arcgis/core/views/3d/layers/i3s/LEPCC.js

ArcGIS Maps SDK for JavaScript: A complete 2D and 3D mapping and data visualization API

/* COPYRIGHT Esri - https://js.arcgis.com/5.0.8/LICENSE.txt */
import e from"../../../../core/Error.js";const t=!0,o={identifierOffset:0,identifierLength:10,versionOffset:10,checksumOffset:12,byteCount:16};function r(e,r,n){return{identifier:String.fromCharCode.apply(null,new Uint8Array(e,n+o.identifierOffset,o.identifierLength)),version:r.getUint16(n+o.versionOffset,t),checksum:r.getUint32(n+o.checksumOffset,t)}}const n={sizeLo:0,sizeHi:4,minX:8,minY:16,minZ:24,maxX:32,maxY:40,maxZ:48,errorX:56,errorY:64,errorZ:72,count:80,reserved:84,byteCount:88};function i(e,o){return{sizeLo:e.getUint32(o+n.sizeLo,t),sizeHi:e.getUint32(o+n.sizeHi,t),minX:e.getFloat64(o+n.minX,t),minY:e.getFloat64(o+n.minY,t),minZ:e.getFloat64(o+n.minZ,t),maxX:e.getFloat64(o+n.maxX,t),maxY:e.getFloat64(o+n.maxY,t),maxZ:e.getFloat64(o+n.maxZ,t),errorX:e.getFloat64(o+n.errorX,t),errorY:e.getFloat64(o+n.errorY,t),errorZ:e.getFloat64(o+n.errorZ,t),count:e.getUint32(o+n.count,t),reserved:e.getUint32(o+n.reserved,t)}}function c(t){const c=new DataView(t,0);let d=0;const{identifier:l,version:a}=r(t,c,d);if(d+=o.byteCount,"LEPCC     "!==l)throw new e("lepcc-decode-error","Bad identifier");if(a>1)throw new e("lepcc-decode-error","Unknown version");const u=i(c,d);d+=n.byteCount;if(u.sizeHi*2**32+u.sizeLo!==t.byteLength)throw new e("lepcc-decode-error","Bad size");const f=new Float64Array(3*u.count),h=[],w=[],g=[],p=[];if(d=s(t,d,h),d=s(t,d,w),d=s(t,d,g),d=s(t,d,p),d!==t.byteLength)throw new e("lepcc-decode-error","Bad length");let m=0,U=0;for(let e=0;e<h.length;e++){U+=h[e];let t=0;for(let o=0;o<w[e];o++){t+=g[m];const e=p[m];f[3*m]=Math.min(u.maxX,u.minX+2*u.errorX*t),f[3*m+1]=Math.min(u.maxY,u.minY+2*u.errorY*U),f[3*m+2]=Math.min(u.maxZ,u.minZ+2*u.errorZ*e),m++}}return{errorX:u.errorX,errorY:u.errorY,errorZ:u.errorZ,result:f}}function s(e,t,o){const r=[];t=d(e,t,r);const n=[];for(let i=0;i<r.length;i++){n.length=0,t=d(e,t,n);for(let e=0;e<n.length;e++)o.push(n[e]+r[i])}return t}function d(o,r,n){const i=new DataView(o,r),c=i.getUint8(0),s=31&c,d=!!(32&c),l=(192&c)>>6;let a=0;if(0===l)a=i.getUint32(1,t),r+=5;else if(1===l)a=i.getUint16(1,t),r+=3;else{if(2!==l)throw new e("lepcc-decode-error","Bad count type");a=i.getUint8(1),r+=2}if(d)throw new e("lepcc-decode-error","LUT not implemented");const u=Math.ceil(a*s/8),f=new Uint8Array(o,r,u);let h=0,w=0,g=0;const p=-1>>>32-s;for(let e=0;e<a;e++){for(;w<s;)h|=f[g]<<w,w+=8,g+=1;n[e]=h&p,h>>>=s,w-=s,w+s>32&&(h|=f[g-1]>>8-w)}return r+g}const l={sizeLo:0,sizeHi:4,count:8,colorMapCount:12,lookupMethod:14,compressionMethod:15,byteCount:16};function a(e,o){return{sizeLo:e.getUint32(o+l.sizeLo,t),sizeHi:e.getUint32(o+l.sizeHi,t),count:e.getUint32(o+l.count,t),colorMapCount:e.getUint16(o+l.colorMapCount,t),lookupMethod:e.getUint8(o+l.lookupMethod),compressionMethod:e.getUint8(o+l.compressionMethod)}}function u(t){const n=new DataView(t,0);let i=0;const{identifier:c,version:s}=r(t,n,i);if(i+=o.byteCount,"ClusterRGB"!==c)throw new e("lepcc-decode-error","Bad identifier");if(s>1)throw new e("lepcc-decode-error","Unknown version");const d=a(n,i);i+=l.byteCount;if(d.sizeHi*2**32+d.sizeLo!==t.byteLength)throw new e("lepcc-decode-error","Bad size");if((2===d.lookupMethod||1===d.lookupMethod)&&0===d.compressionMethod){if(3*d.colorMapCount+d.count+i!==t.byteLength||d.colorMapCount>256)throw new e("lepcc-decode-error","Bad count");const o=new Uint8Array(t,i,3*d.colorMapCount),r=new Uint8Array(t,i+3*d.colorMapCount,d.count),n=new Uint8Array(3*d.count);for(let e=0;e<d.count;e++){const t=r[e];n[3*e]=o[3*t],n[3*e+1]=o[3*t+1],n[3*e+2]=o[3*t+2]}return n}if(0===d.lookupMethod&&0===d.compressionMethod){if(3*d.count+i!==t.byteLength||0!==d.colorMapCount)throw new e("lepcc-decode-error","Bad count");return new Uint8Array(t,i).slice()}if(d.lookupMethod<=2&&1===d.compressionMethod){if(i+3!==t.byteLength||1!==d.colorMapCount)throw new e("lepcc-decode-error","Bad count");const o=n.getUint8(i),r=n.getUint8(i+1),c=n.getUint8(i+2),s=new Uint8Array(3*d.count);for(let e=0;e<d.count;e++)s[3*e]=o,s[3*e+1]=r,s[3*e+2]=c;return s}throw new e("lepcc-decode-error","Bad method "+d.lookupMethod+","+d.compressionMethod)}const f={sizeLo:0,sizeHi:4,count:8,scaleFactor:12,bitsPerPoint:14,reserved:15,byteCount:16};function h(e,o){return{sizeLo:e.getUint32(o+f.sizeLo,t),sizeHi:e.getUint32(o+f.sizeHi,t),count:e.getUint32(o+f.count,t),scaleFactor:e.getUint16(o+f.scaleFactor,t),bitsPerPoint:e.getUint8(o+f.bitsPerPoint),reserved:e.getUint8(o+f.reserved)}}function w(t){const n=new DataView(t,0);let i=0;const{identifier:c,version:s}=r(t,n,i);if(i+=o.byteCount,"Intensity "!==c)throw new e("lepcc-decode-error","Bad identifier");if(s>1)throw new e("lepcc-decode-error","Unknown version");const l=h(n,i);i+=f.byteCount;if(l.sizeHi*2**32+l.sizeLo!==t.byteLength)throw new e("lepcc-decode-error","Bad size");const a=new Uint16Array(l.count);if(8===l.bitsPerPoint){if(l.count+i!==t.byteLength)throw new e("lepcc-decode-error","Bad size");const o=new Uint8Array(t,i,l.count);for(let e=0;e<l.count;e++)a[e]=o[e]*l.scaleFactor}else if(16===l.bitsPerPoint){if(2*l.count+i!==t.byteLength)throw new e("lepcc-decode-error","Bad size");const o=new Uint16Array(t,i,l.count);for(let e=0;e<l.count;e++)a[e]=o[e]*l.scaleFactor}else{const o=[];if(d(t,i,o)!==t.byteLength)throw new e("lepcc-decode-error","Bad size");for(let e=0;e<l.count;e++)a[e]=o[e]*l.scaleFactor}return a}export{w as decodeIntensity,u as decodeRGB,c as decodeXYZ};