three.js: [124] TiltLoader breaks in a module env

Hi, author of fflate here! The reason the async version exists in JSZip is beyond me, since it doesn’t actually offload the processing to other threads. On the other hand, if the assets in the ZIP are reasonably large (around 500kB), fflate will use worker threads to compress/decompress them faster.

However, I looked at some of the demos using JSZip and they don’t seem to load that much data, so using the synchronous unzipping algorithm would be no different to the async version. You could even replace gunzip.js, which is used by the NRRD loader, with fflate because gunzip and unzip use the same core algorithm.

Since it seems the ThreeJS team wants minified ES6 module scripts, I’ve hand-tuned a minified version of the library and pasted it below. It’s 4.4kB (2.2kB gzipped) and supports synchronous ZIP decompression (through the exported unzipSync method) and GZIP decompression (through gunzipSync).

Usage:

import { unzipSync, strFromU8 } from '../libs/fflate.module.min.js';
let arrayBuffer = ... // From XHR, presumably
const zip = unzipSync(new Uint8Array(arrayBuffer));

// If we were using JSZip, the following would be:
// zip.files['data.xml'].asUint8Array()
const dataXmlU8 = zip['data.xml'];
// zip.files['data.xml'].asArrayBuffer()
const dataXmlBuffer = dataXmlU8.buffer;
// zip.files['data.xml'].asText()
const dataXmlText = strFromU8(dataXmlU8);

import { gunzipSync } from '../libs/fflate.module.min.js';
let arrayBuffer = ... // From XHR, presumably

// If we were using gunzip.js, the following would be:
// const gunzip = new Zlib.Gunzip(new Uint8Array(arrayBuffer));
// const data = gunzip.decompress();
const data = gunzipSync(new Uint8Array(arrayBuffer));

Minified code (to put in fflate.module.min.js):

/*!
fflate - fast JavaScript compression/decompression
<https://101arrowz.github.io/fflate>
Licensed under MIT. https://github.com/101arrowz/fflate/blob/master/LICENSE
Subset included: synchronous unzip and gunzip
*/
"use strict";var r=Uint8Array,n=Uint16Array,e=Uint32Array,t=new r([0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,0,0,0,0]),a=new r([0,0,0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13,0,0]),i=new r([16,17,18,0,8,7,9,6,10,5,11,4,12,3,13,2,14,1,15]),f=function(r,e){for(var t=new n(31),a=0;a<31;++a)t[a]=e+=1<<r[a-1];return t},o=f(t,2);o[28]=258;for(var u=f(a,0),v=new n(32768),l=0;l<32768;++l){var c=(43690&l)>>>1|(21845&l)<<1;c=(61680&(c=(52428&c)>>>2|(13107&c)<<2))>>>4|(3855&c)<<4,v[l]=((65280&c)>>>8|(255&c)<<8)>>>1}var w=function(r,e){for(var t=r.length,a=0,i=new n(e);a<t;++a)++i[r[a]-1];var f=new n(1<<e),o=new n(e);for(a=0;a<e;++a)o[a]=o[a-1]+i[a-1]<<1;var u=15-e;for(a=0;a<t;++a)if(r[a])for(var l=a<<4|r[a],c=e-r[a],w=o[r[a]-1]++<<c,h=w|(1<<c)-1;w<=h;++w)f[v[w]>>>u]=l;return f},h=new r(288);for(l=0;l<144;++l)h[l]=8;for(l=144;l<256;++l)h[l]=9;for(l=256;l<280;++l)h[l]=7;for(l=280;l<288;++l)h[l]=8;var d=new r(32);for(l=0;l<32;++l)d[l]=5;var s=w(h,9),g=w(d,5),p=function(r){for(var n=r[0],e=1;e<r.length;++e)r[e]>n&&(n=r[e]);return n},y=function(r,n,e){var t=n/8>>0;return(r[t]|r[t+1]<<8)>>>(7&n)&e},b=function(r,n){var e=n/8>>0;return(r[e]|r[e+1]<<8|r[e+2]<<16)>>>(7&n)},x=function(r){return(r/8>>0)+(7&r&&1)},m=function(t,a,i){(null==a||a<0)&&(a=0),(null==i||i>t.length)&&(i=t.length);var f=new(t instanceof n?n:t instanceof e?e:r)(i-a);return f.set(t.subarray(a,i)),f},C=function(n,e,f){var v=n.length,l=!e||f,c=!f||f.i;f||(f={}),e||(e=new r(3*v));var h=function(n){var t=e.length;if(n>t){var a=new r(Math.max(2*t,n));a.set(e),e=a}},d=f.f||0,C=f.p||0,S=f.b||0,k=f.l,F=f.d,z=f.m,E=f.n;if(d&&!k)return e;var O=8*v;do{if(!k){f.f=d=y(n,C,1);var U=y(n,C+1,3);if(C+=3,!U){var A=n[(K=x(C)+4)-4]|n[K-3]<<8,D=K+A;if(D>v){if(c)throw"unexpected EOF";break}l&&h(S+A),e.set(n.subarray(K,D),S),f.b=S+=A,f.p=C=8*D;continue}if(1==U)k=s,F=g,z=9,E=5;else{if(2!=U)throw"invalid block type";var T=y(n,C,31)+257,M=y(n,C+10,15)+4,j=T+y(n,C+5,31)+1;C+=14;for(var q=new r(j),B=new r(19),G=0;G<M;++G)B[i[G]]=y(n,C+3*G,7);C+=3*M;var H=p(B),I=(1<<H)-1;if(!c&&C+j*(H+7)>O)break;var J=w(B,H);for(G=0;G<j;){var K,L=J[y(n,C,I)];if(C+=15&L,(K=L>>>4)<16)q[G++]=K;else{var N=0,P=0;for(16==K?(P=3+y(n,C,3),C+=2,N=q[G-1]):17==K?(P=3+y(n,C,7),C+=3):18==K&&(P=11+y(n,C,127),C+=7);P--;)q[G++]=N}}var Q=q.subarray(0,T),R=q.subarray(T);z=p(Q),E=p(R),k=w(Q,z),F=w(R,E)}if(C>O)throw"unexpected EOF"}l&&h(S+131072);for(var V=(1<<z)-1,W=(1<<E)-1,X=z+E+18;c||C+X<O;){var Y=(N=k[b(n,C)&V])>>>4;if((C+=15&N)>O)throw"unexpected EOF";if(!N)throw"invalid length/literal";if(Y<256)e[S++]=Y;else{if(256==Y){k=null;break}var Z=Y-254;if(Y>264){var $=t[G=Y-257];Z=y(n,C,(1<<$)-1)+o[G],C+=$}var _=F[b(n,C)&W],rr=_>>>4;if(!_)throw"invalid distance";if(C+=15&_,R=u[rr],rr>3&&($=a[rr],R+=b(n,C)&(1<<$)-1,C+=$),C>O)throw"unexpected EOF";l&&h(S+131072);for(var nr=S+Z;S<nr;S+=4)e[S]=e[S-R],e[S+1]=e[S+1-R],e[S+2]=e[S+2-R],e[S+3]=e[S+3-R];S=nr}}f.l=k,f.p=C,f.b=S,k&&(d=1,f.m=z,f.d=F,f.n=E)}while(!d);return S==e.length?e:m(e,0,S)},S=function(r,n){return r[n]|r[n+1]<<8},k=function(r,n){return(r[n]|r[n+1]<<8|r[n+2]<<16)+2*(r[n+3]<<23)},F=function(r){var n="";if("undefined"!=typeof TextDecoder)return(new TextDecoder).decode(r);for(var e=0;e<r.length;){var t=r[e++];t<128?n+=String.fromCharCode(t):t<224?n+=String.fromCharCode((31&t)<<6|63&r[e++]):t<240?n+=String.fromCharCode((15&t)<<12|(63&r[e++])<<6|63&r[e++]):(t=((15&t)<<18|(63&r[e++])<<12|(63&r[e++])<<6|63&r[e++])-65536,n+=String.fromCharCode(55296|t>>10,56320|1023&t))}return n};export var strFromU8=F;var z=function(r,n){S(r,n+8);var e=S(r,n+10),t=k(r,n+20),a=k(r,n+24),i=S(r,n+28);return[t,e,a,F(r.subarray(n+46,n+46+i)),n+46+i+S(r,n+30)+S(r,n+32),k(r,n+42)]};export var unzipSync=function(n){for(var e={},t=n.length-22;101010256!=k(n,t);--t)if(!t||n.length-t>65558)throw"invalid zip file";var a=S(n,t+8);if(!a)return{};for(var i=k(n,t+16),f=0;f<a;++f){var o=z(n,i),u=o[0],v=o[1],l=o[2],c=o[3],w=o[4],h=o[5],d=h+30+S(n,h+26)+S(n,h+28);if(i=w,v){if(8!=v)throw"unknown compression type "+v;e[c]=C(n.subarray(d,d+u),new r(l))}else e[c]=m(n,d,d+u)}return e};export var gunzipSync=function(n){return C(n.subarray(function(r){if(31!=r[0]||139!=r[1]||8!=r[2])throw"invalid gzip data";var n=r[3],e=10;4&n&&(e+=r[10]|2+(r[11]<<8));for(var t=(n>>3&1)+(n>>4&1);t>0;t-=!r[e++]);return e+(2&n)}(n),-8),new r(function(r){var n=r.length;return(r[n-4]|r[n-3]<<8|r[n-2]<<16)+2*(r[n-1]<<23)}(n)))}

Btw, I generally wonder why these aren’t npm dependencies. jszip is here: https://www.npmjs.com/package/jszip Why would threejs use a local copy? If my app already happens to use jszip, it would now serve it twice, not to mention the headache on your side keeping these dependencies up to date.

This duplication issue will still exist if the examples were to use fflate, but since most users seem to think of 4kB as pocket change, it probably doesn’t matter.

I added the ZIP function into fflateDeflate.

fflate-deflate.min.js:

/*!
fflate - fast JavaScript compression/decompression
<https://101arrowz.github.io/fflate>
Licensed under MIT. https://github.com/101arrowz/fflate/blob/master/LICENSE
Subset included: synchronous deflate, synchronous zip
*/
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Q=2,R=0,V=x,W=L-N&32767;if(O>2&&K==F(m-W))for(var X=Math.min(b,O)-1,Z=Math.min(32767,m),$=Math.min(258,O);W<=Z&&--V&&L!=N;){if(a[m+Q]==a[m+Q-W]){for(var _=0;_<$&&a[m+_]==a[m+_-W];++_);if(_>Q){if(Q=_,R=W,_>X)break;var rr=Math.min(W,_-2),nr=0;for(P=0;P<rr;++P){var er=m-W+P+32768&32767,tr=er-U[er]+32768&32767;tr>nr&&(nr=tr,N=er)}}}W+=(L=N)-(N=U[L])+32768&32767}if(R){H[G++]=268435456|u[Q]<<18|c[R];var fr=31&u[Q],ar=31&c[R];B+=t[fr]+f[ar],++Y[257+fr],++j[ar],I=m+Q,++q}else H[G++]=a[m],++Y[a[m]]}}d=k(a,w,s,H,Y,j,B,G,J,m-J,d),s||(d=T(w,d,C))}return function(t,f,a){(null==f||f<0)&&(f=0),(null==a||a>t.length)&&(a=t.length);var o=new(t instanceof n?n:t instanceof e?e:r)(a-f);return o.set(t.subarray(f,a)),o}(g,0,i+M(d)+l)},F=function(r,n,e,t,f){return E(r,null==n.level?6:n.level,null==n.mem?Math.ceil(1.5*Math.max(8,Math.min(13,Math.log(r.length)))):12+n.mem,e,t,!f)},H=function(r,n,e){for(;e;++n)r[n]=e,e>>>=8};_e.zlibSync=function(r,n){void 0===n&&(n={});var e=function(){var r=1,n=0;return{p:function(e){for(var t=r,f=n,a=e.length,o=0;o!=a;){for(var v=Math.min(o+5552,a);o<v;++o)f+=t+=e[o];t%=65521,f%=65521}r=t,n=f},d:function(){return(r>>>8<<16|(255&n)<<8|n>>>8)+2*((255&r)<<23)}}}();e.p(r);var t=F(r,n,2,4);return function(r,n){var e=n.level,t=0==e?0:e<6?1:9==e?3:2;r[0]=120,r[1]=t<<6|(t?32-2*t:1)}(t,n),H(t,t.length-4,e.d()),t};var Y=function(n,e,t,f){for(var a in n){var o=n[a],v=e+a;o instanceof r?t[v]=[o,f]:Array.isArray(o)?t[v]=[o[0],mrg(f,o[1])]:Y(o,v+"/",t,f)}};function j(n,e){var t=n.length;if(!e&&"undefined"!=typeof TextEncoder)return(new TextEncoder).encode(n);for(var f=new r(n.length+(n.length>>>1)),a=0,o=function(r){f[a++]=r},v=0;v<t;++v){if(a+5>f.length){var i=new r(a+8+(t-v<<1));i.set(f),f=i}var u=n.charCodeAt(v);u<128||e?o(u):u<2048?(o(192|u>>>6),o(128|63&u)):u>55295&&u<57344?(o(240|(u=65536+(1047552&u)|1023&n.charCodeAt(++v))>>>18),o(128|u>>>12&63),o(128|u>>>6&63),o(128|63&u)):(o(224|u>>>12),o(128|u>>>6&63),o(128|63&u))}return slc(f,0,a)}_e.strToU8=j;for(var q=function(r,n,e,t,f,a,o,v,i,u){var l=a.length,c=t.length;H(r,n,null!=i?33639248:67324752),n+=4,null!=i&&(r[n]=20,n+=2),r[n]=20,n+=2,r[n++]=8==u&&(1==v.level?6:v.level<6?4:9==v.level?2:0),r[n++]=o&&8,r[n]=u,n+=2;var s=new Date(v.mtime||Date.now()),h=s.getFullYear()-1980;if(h<0||h>119)throw"date not in range 1980-2099";H(r,n,2*(h<<24)|s.getMonth()+1<<21|s.getDate()<<16|s.getHours()<<11|s.getMinutes()<<5|s.getSeconds()>>>1),H(r,n+=4,e),H(r,n+4,c),H(r,n+8,f),H(r,n+12,l),n+=16,null!=i&&(H(r,n+=10,i),n+=4),r.set(a,n),n+=l,null==i&&r.set(t,n)},B=new e(256),G=0;G<256;++G){for(var I=G,J=9;--J;)I=(1&I&&3988292384)^I>>>1;B[G]=I}var K=function(){var r=4294967295;return{p:function(n){for(var e=r,t=0;t<n.length;++t)e=B[255&e^n[t]]^e>>>8;r=e},d:function(){return 4294967295^r}}};_e.zipSync=function(n,e){void 0===e&&(e={});var t={},f=[];Y(n,"",t,e);var a=0,o=0;for(var v in t){var i=t[v],u=i[0],l=i[1],c=0==l.level?0:8,s=j(v),h=s.length;if(s.length>65535)throw"filename too long";var g=c?F(u,l,0,0):u,w=g.length,d=K();d.p(u),f.push({t:c,d:g,m:u.length,c:d.d(),u:v.length!=h,n:s,o:a,p:l}),a+=30+h+w,o+=76+2*h+w}for(var m=new r(o+22),p=a,y=o-a,M=0;M<f.length;++M){var b=f[M];q(m,b.o,b.c,b.d,b.m,b.n,b.u,b.p,null,b.t),q(m,a,b.c,b.d,b.m,b.n,b.u,b.p,b.o,b.t),a+=46+b.n.length}return function(r,n,e,t,f){H(r,n,101010256),H(r,n+8,e),H(r,n+10,e),H(r,n+12,t),H(r,n+16,f)}(m,a,f.length,y,p),m};return _e})

fflate-deflate.min.module.js:

/*!
fflate - fast JavaScript compression/decompression
<https://101arrowz.github.io/fflate>
Licensed under MIT. https://github.com/101arrowz/fflate/blob/master/LICENSE
Subset included: synchronous deflate, synchronous zip
*/
"use strict";var r=Uint8Array,n=Uint16Array,e=Uint32Array,t=new r([0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,0,0,0,0]),f=new r([0,0,0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13,0,0]),a=new r([16,17,18,0,8,7,9,6,10,5,11,4,12,3,13,2,14,1,15]),o=function(r,t){for(var f=new n(31),a=0;a<31;++a)f[a]=t+=1<<r[a-1];var o=new e(f[30]);for(a=1;a<30;++a)for(var v=f[a];v<f[a+1];++v)o[v]=v-f[a]<<5|a;return[f,o]},v=o(t,2),i=v[0],u=v[1];i[28]=258,u[258]=28;for(var l=o(f,0),c=(l[0],l[1]),s=new n(32768),h=0;h<32768;++h){var g=(43690&h)>>>1|(21845&h)<<1;g=(61680&(g=(52428&g)>>>2|(13107&g)<<2))>>>4|(3855&g)<<4,s[h]=((65280&g)>>>8|(255&g)<<8)>>>1}var w=function(r,e,t){for(var f=r.length,a=0,o=new n(e);a<f;++a)++o[r[a]-1];var v,i=new n(e);for(a=0;a<e;++a)i[a]=i[a-1]+o[a-1]<<1;if(t){v=new n(1<<e);var u=15-e;for(a=0;a<f;++a)if(r[a])for(var l=a<<4|r[a],c=e-r[a],h=i[r[a]-1]++<<c,g=h|(1<<c)-1;h<=g;++h)v[s[h]>>>u]=l}else for(v=new n(f),a=0;a<f;++a)v[a]=s[i[r[a]-1]++]>>>15-r[a];return v},d=new r(288);for(h=0;h<144;++h)d[h]=8;for(h=144;h<256;++h)d[h]=9;for(h=256;h<280;++h)d[h]=7;for(h=280;h<288;++h)d[h]=8;var m=new r(32);for(h=0;h<32;++h)m[h]=5;var p=w(d,9,0),y=w(m,5,0),M=function(r){return(r/8>>0)+(7&r&&1)},b=function(r,n,e){e<<=7&n;var t=n/8>>0;r[t]|=e,r[t+1]|=e>>>8},x=function(r,n,e){e<<=7&n;var t=n/8>>0;r[t]|=e,r[t+1]|=e>>>8,r[t+2]|=e>>>16},A=function(e,t){for(var f=[],a=0;a<e.length;++a)e[a]&&f.push({s:a,f:e[a]});var o=f.length,v=f.slice();if(!o)return[new r(0),0];if(1==o){var i=new r(f[0].s+1);return i[f[0].s]=1,[i,1]}f.sort((function(r,n){return r.f-n.f})),f.push({s:-1,f:25001});var u=f[0],l=f[1],c=0,s=1,h=2;for(f[0]={s:-1,f:u.f+l.f,l:u,r:l};s!=o-1;)u=f[f[c].f<f[h].f?c++:h++],l=f[c!=s&&f[c].f<f[h].f?c++:h++],f[s++]={s:-1,f:u.f+l.f,l:u,r:l};var g=v[0].s;for(a=1;a<o;++a)v[a].s>g&&(g=v[a].s);var w=new n(g+1),d=U(f[s-1],w,0);if(d>t){a=0;var m=0,p=d-t,y=1<<p;for(v.sort((function(r,n){return w[n.s]-w[r.s]||r.f-n.f}));a<o;++a){var M=v[a].s;if(!(w[M]>t))break;m+=y-(1<<d-w[M]),w[M]=t}for(m>>>=p;m>0;){var b=v[a].s;w[b]<t?m-=1<<t-w[b]++-1:++a}for(;a>=0&&m;--a){var x=v[a].s;w[x]==t&&(--w[x],++m)}d=t}return[new r(w),d]},U=function(r,n,e){return-1==r.s?Math.max(U(r.l,n,e+1),U(r.r,n,e+1)):n[r.s]=e},D=function(r){for(var e=r.length;e&&!r[--e];);for(var t=new n(++e),f=0,a=r[0],o=1,v=function(r){t[f++]=r},i=1;i<=e;++i)if(r[i]==a&&i!=e)++o;else{if(!a&&o>2){for(;o>138;o-=138)v(32754);o>2&&(v(o>10?o-11<<5|28690:o-3<<5|12305),o=0)}else if(o>3){for(v(a),--o;o>6;o-=6)v(8304);o>2&&(v(o-3<<5|8208),o=0)}for(;o--;)v(a);o=1,a=r[i]}return[t.subarray(0,f),e]},S=function(r,n){for(var e=0,t=0;t<n.length;++t)e+=r[t]*n[t];return e},T=function(r,n,e){var t=e.length,f=M(n+2);r[f]=255&t,r[f+1]=t>>>8,r[f+2]=255^r[f],r[f+3]=255^r[f+1];for(var a=0;a<t;++a)r[f+a+4]=e[a];return 8*(f+4+t)},k=function(r,e,o,v,i,u,l,c,s,h,g){b(e,g++,o),++i[256];for(var M=A(i,15),U=M[0],k=M[1],z=A(u,15),C=z[0],E=z[1],F=D(U),H=F[0],Y=F[1],j=D(C),q=j[0],B=j[1],G=new n(19),I=0;I<H.length;++I)G[31&H[I]]++;for(I=0;I<q.length;++I)G[31&q[I]]++;for(var J=A(G,7),K=J[0],L=J[1],N=19;N>4&&!K[a[N-1]];--N);var O,P,Q,R,V=h+5<<3,W=S(i,d)+S(u,m)+l,X=S(i,U)+S(u,C)+l+14+3*N+S(G,K)+(2*G[16]+3*G[17]+7*G[18]);if(V<=W&&V<=X)return T(e,g,r.subarray(s,s+h));if(b(e,g,1+(X<W)),g+=2,X<W){O=w(U,k,0),P=U,Q=w(C,E,0),R=C;var Z=w(K,L,0);for(b(e,g,Y-257),b(e,g+5,B-1),b(e,g+10,N-4),g+=14,I=0;I<N;++I)b(e,g+3*I,K[a[I]]);g+=3*N;for(var $=[H,q],_=0;_<2;++_){var rr=$[_];for(I=0;I<rr.length;++I){var nr=31&rr[I];b(e,g,Z[nr]),g+=K[nr],nr>15&&(b(e,g,rr[I]>>>5&127),g+=rr[I]>>>12)}}}else O=p,P=d,Q=y,R=m;for(I=0;I<c;++I)if(v[I]>255){nr=v[I]>>>18&31,x(e,g,O[nr+257]),g+=P[nr+257],nr>7&&(b(e,g,v[I]>>>23&31),g+=t[nr]);var er=31&v[I];x(e,g,Q[er]),g+=R[er],er>3&&(x(e,g,v[I]>>>5&8191),g+=f[er])}else x(e,g,O[v[I]]),g+=P[v[I]];return x(e,g,O[256]),g+P[256]},z=new e([65540,131080,131088,131104,262176,1048704,1048832,2114560,2117632]),C=new r(0),E=function(a,o,v,i,l,s){var h=a.length,g=new r(i+h+5*(1+Math.floor(h/7e3))+l),w=g.subarray(i,g.length-l),d=0;if(!o||h<8)for(var m=0;m<=h;m+=65535){var p=m+65535;p<h?d=T(w,d,a.subarray(m,p)):(w[m]=s,d=T(w,d,a.subarray(m,h)))}else{for(var y=z[o-1],b=y>>>13,x=8191&y,A=(1<<v)-1,U=new n(32768),D=new n(A+1),S=Math.ceil(v/3),E=2*S,F=function(r){return(a[r]^a[r+1]<<S^a[r+2]<<E)&A},H=new e(25e3),Y=new n(288),j=new n(32),q=0,B=0,G=(m=0,0),I=0,J=0;m<h;++m){var K=F(m),L=32767&m,N=D[K];if(U[L]=N,D[K]=L,I<=m){var O=h-m;if((q>7e3||G>24576)&&O>423){d=k(a,w,0,H,Y,j,B,G,J,m-J,d),G=q=B=0,J=m;for(var P=0;P<286;++P)Y[P]=0;for(P=0;P<30;++P)j[P]=0}var Q=2,R=0,V=x,W=L-N&32767;if(O>2&&K==F(m-W))for(var X=Math.min(b,O)-1,Z=Math.min(32767,m),$=Math.min(258,O);W<=Z&&--V&&L!=N;){if(a[m+Q]==a[m+Q-W]){for(var _=0;_<$&&a[m+_]==a[m+_-W];++_);if(_>Q){if(Q=_,R=W,_>X)break;var rr=Math.min(W,_-2),nr=0;for(P=0;P<rr;++P){var er=m-W+P+32768&32767,tr=er-U[er]+32768&32767;tr>nr&&(nr=tr,N=er)}}}W+=(L=N)-(N=U[L])+32768&32767}if(R){H[G++]=268435456|u[Q]<<18|c[R];var fr=31&u[Q],ar=31&c[R];B+=t[fr]+f[ar],++Y[257+fr],++j[ar],I=m+Q,++q}else H[G++]=a[m],++Y[a[m]]}}d=k(a,w,s,H,Y,j,B,G,J,m-J,d),s||(d=T(w,d,C))}return function(t,f,a){(null==f||f<0)&&(f=0),(null==a||a>t.length)&&(a=t.length);var o=new(t instanceof n?n:t instanceof e?e:r)(a-f);return o.set(t.subarray(f,a)),o}(g,0,i+M(d)+l)},F=function(r,n,e,t,f){return E(r,null==n.level?6:n.level,null==n.mem?Math.ceil(1.5*Math.max(8,Math.min(13,Math.log(r.length)))):12+n.mem,e,t,!f)},H=function(r,n,e){for(;e;++n)r[n]=e,e>>>=8};export var zlibSync=function(r,n){void 0===n&&(n={});var e=function(){var r=1,n=0;return{p:function(e){for(var t=r,f=n,a=e.length,o=0;o!=a;){for(var v=Math.min(o+5552,a);o<v;++o)f+=t+=e[o];t%=65521,f%=65521}r=t,n=f},d:function(){return(r>>>8<<16|(255&n)<<8|n>>>8)+2*((255&r)<<23)}}}();e.p(r);var t=F(r,n,2,4);return function(r,n){var e=n.level,t=0==e?0:e<6?1:9==e?3:2;r[0]=120,r[1]=t<<6|(t?32-2*t:1)}(t,n),H(t,t.length-4,e.d()),t};var Y=function(n,e,t,f){for(var a in n){var o=n[a],v=e+a;o instanceof r?t[v]=[o,f]:Array.isArray(o)?t[v]=[o[0],mrg(f,o[1])]:Y(o,v+"/",t,f)}};function j(n,e){var t=n.length;if(!e&&"undefined"!=typeof TextEncoder)return(new TextEncoder).encode(n);for(var f=new r(n.length+(n.length>>>1)),a=0,o=function(r){f[a++]=r},v=0;v<t;++v){if(a+5>f.length){var i=new r(a+8+(t-v<<1));i.set(f),f=i}var u=n.charCodeAt(v);u<128||e?o(u):u<2048?(o(192|u>>>6),o(128|63&u)):u>55295&&u<57344?(o(240|(u=65536+(1047552&u)|1023&n.charCodeAt(++v))>>>18),o(128|u>>>12&63),o(128|u>>>6&63),o(128|63&u)):(o(224|u>>>12),o(128|u>>>6&63),o(128|63&u))}return slc(f,0,a)}export var strToU8=j;for(var q=function(r,n,e,t,f,a,o,v,i,u){var l=a.length,c=t.length;H(r,n,null!=i?33639248:67324752),n+=4,null!=i&&(r[n]=20,n+=2),r[n]=20,n+=2,r[n++]=8==u&&(1==v.level?6:v.level<6?4:9==v.level?2:0),r[n++]=o&&8,r[n]=u,n+=2;var s=new Date(v.mtime||Date.now()),h=s.getFullYear()-1980;if(h<0||h>119)throw"date not in range 1980-2099";H(r,n,2*(h<<24)|s.getMonth()+1<<21|s.getDate()<<16|s.getHours()<<11|s.getMinutes()<<5|s.getSeconds()>>>1),H(r,n+=4,e),H(r,n+4,c),H(r,n+8,f),H(r,n+12,l),n+=16,null!=i&&(H(r,n+=10,i),n+=4),r.set(a,n),n+=l,null==i&&r.set(t,n)},B=new e(256),G=0;G<256;++G){for(var I=G,J=9;--J;)I=(1&I&&3988292384)^I>>>1;B[G]=I}var K=function(){var r=4294967295;return{p:function(n){for(var e=r,t=0;t<n.length;++t)e=B[255&e^n[t]]^e>>>8;r=e},d:function(){return 4294967295^r}}};export var zipSync=function(n,e){void 0===e&&(e={});var t={},f=[];Y(n,"",t,e);var a=0,o=0;for(var v in t){var i=t[v],u=i[0],l=i[1],c=0==l.level?0:8,s=j(v),h=s.length;if(s.length>65535)throw"filename too long";var g=c?F(u,l,0,0):u,w=g.length,d=K();d.p(u),f.push({t:c,d:g,m:u.length,c:d.d(),u:v.length!=h,n:s,o:a,p:l}),a+=30+h+w,o+=76+2*h+w}for(var m=new r(o+22),p=a,y=o-a,M=0;M<f.length;++M){var b=f[M];q(m,b.o,b.c,b.d,b.m,b.n,b.u,b.p,null,b.t),q(m,a,b.c,b.d,b.m,b.n,b.u,b.p,b.o,b.t),a+=46+b.n.length}return function(r,n,e,t,f){H(r,n,101010256),H(r,n+8,e),H(r,n+10,e),H(r,n+12,t),H(r,n+16,f)}(m,a,f.length,y,p),m}

Usage:

import { zipSync, strToU8 } from 'fflate';

const toZip = {};
// instead of zip.file(name, strData)
toZip[name] = strToU8(strData);
// instead of zip.file(name, arrayBufferData)
toZip[name] = new Uint8Array(arrayBufferData);
// instead of zip.file(name, uint8ArrayData)
toZip[name] = uint8ArrayData;

// If you have incompressible data (e.g. PNG file)
// set per-file options
toZip[name] = [uint8ArrayData, { level: 0 }];

// instead of zip.generate
const zipped = zipSync(toZip, {
  // You can change the level to 0 to not waste time
  // Better to use per-file options - this level only
  // has effect if no per-file options set
  level: 9
});

// to create a blob:
const zippedBlob = new Blob([zipped.buffer], {
  type: 'application/zip'
});

Side note: in case @sciecode is still working on this, fflate.unzlibSync(u8Data, new Uint8Array(uncompressedSize)) will work well for you. See the docs.

Also, if you’re still looking into the EXR exporter, try fflateDeflate.zlibSync(u8Data, options). Docs

My bad, updated the code in my most recent comment. I had forgotten to switch the CommonJS exports to ESM. UMD build should already be live on jsDelivr, I believe, but you could probably wrap the minified code to make the UMD build smaller too.

On looking again at the source code here, it seems that a lot of compression libraries could be replaced by a single one, which is probably better to avoid fragmentation…Will create a more complete minified copy soon and create a PR.

EDIT: Here are my (semi) final revisions for the versions:

fflate.min.js (replaces gunzip.js, inflate.js, jszip.js):

!function(f){typeof exports=="object"&&typeof module!="undefined"?module.exports=f():typeof define=='function'&&define.amd?define([],f):(typeof window!="undefined"?window:typeof global!="undefined"?global:typeof self!="undefined"&&self).fflate=f()}(function(_e){"use strict";var _e={},r=Uint8Array,n=Uint16Array,e=Uint32Array,t=new r([0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,0,0,0,0]),a=new r([0,0,0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13,0,0]),i=new r([16,17,18,0,8,7,9,6,10,5,11,4,12,3,13,2,14,1,15]),o=function(r,t){for(var a=new n(31),i=0;i<31;++i)a[i]=t+=1<<r[i-1];var o=new e(a[30]);for(i=1;i<30;++i)for(var f=a[i];f<a[i+1];++f)o[f]=f-a[i]<<5|i;return[a,o]},f=o(t,2),u=f[0],v=f[1];u[28]=258,v[258]=28;for(var c=o(a,0),l=c[0],w=(c[1],new n(32768)),h=0;h<32768;++h){var s=(43690&h)>>>1|(21845&h)<<1;s=(61680&(s=(52428&s)>>>2|(13107&s)<<2))>>>4|(3855&s)<<4,w[h]=((65280&s)>>>8|(255&s)<<8)>>>1}var d=function(r,e){for(var t=r.length,a=0,i=new n(e);a<t;++a)++i[r[a]-1];var o=new n(e);for(a=0;a<e;++a)o[a]=o[a-1]+i[a-1]<<1;var f=new n(1<<e),u=15-e;for(a=0;a<t;++a)if(r[a])for(var v=a<<4|r[a],c=e-r[a],l=o[r[a]-1]++<<c,h=l|(1<<c)-1;l<=h;++l)f[w[l]>>>u]=v;return f},p=new r(288);for(h=0;h<144;++h)p[h]=8;for(h=144;h<256;++h)p[h]=9;for(h=256;h<280;++h)p[h]=7;for(h=280;h<288;++h)p[h]=8;var g=new r(32);for(h=0;h<32;++h)g[h]=5;var y=d(p,9),b=d(g,5),x=function(r){for(var n=r[0],e=1;e<r.length;++e)r[e]>n&&(n=r[e]);return n},z=function(r,n,e){var t=n/8>>0;return(r[t]|r[t+1]<<8)>>>(7&n)&e},C=function(r,n){var e=n/8>>0;return(r[e]|r[e+1]<<8|r[e+2]<<16)>>>(7&n)},m=function(r){return(r/8>>0)+(7&r&&1)},S=function(t,a,i){(null==a||a<0)&&(a=0),(null==i||i>t.length)&&(i=t.length);var o=new(t instanceof n?n:t instanceof e?e:r)(i-a);return o.set(t.subarray(a,i)),o},F=function(n,e){var o=n.length,f=!e;e||(e=new r(3*o));var v,c,w,h,s=function(n){var t=e.length;if(n>t){var a=new r(Math.max(2*t,n));a.set(e),e=a}},p=0,g=0,F=0;if(p&&!v)return e;var E=8*o;do{p=z(n,g,1);var O=z(n,g+1,3);if(g+=3,O){if(1==O)v=y,c=b,w=9,h=5;else{if(2!=O)throw"invalid block type";var U=z(n,g,31)+257,k=z(n,g+10,15)+4,A=U+z(n,g+5,31)+1;g+=14;for(var D=new r(A),T=new r(19),M=0;M<k;++M)T[i[M]]=z(n,g+3*M,7);g+=3*k;var j=x(T),q=(1<<j)-1,B=d(T,j);for(M=0;M<A;){var G=B[z(n,g,q)];if(g+=15&G,(Y=G>>>4)<16)D[M++]=Y;else{var H=0,I=0;for(16==Y?(I=3+z(n,g,3),g+=2,H=D[M-1]):17==Y?(I=3+z(n,g,7),g+=3):18==Y&&(I=11+z(n,g,127),g+=7);I--;)D[M++]=H}}var J=D.subarray(0,U),K=D.subarray(U);w=x(J),h=x(K),v=d(J,w),c=d(K,h)}if(g>E)throw"unexpected EOF";f&&s(F+131072);for(var L=(1<<w)-1,N=(1<<h)-1;;){var P=(H=v[C(n,g)&L])>>>4;if((g+=15&H)>E)throw"unexpected EOF";if(!H)throw"invalid length/literal";if(P<256)e[F++]=P;else{if(256==P)break;var Q=P-254;if(P>264){var R=t[M=P-257];Q=z(n,g,(1<<R)-1)+u[M],g+=R}var V=c[C(n,g)&N],W=V>>>4;if(!V)throw"invalid distance";g+=15&V;K=l[W];if(W>3){R=a[W];K+=C(n,g)&(1<<R)-1,g+=R}if(g>E)throw"unexpected EOF";f&&s(F+131072);for(var X=F+Q;F<X;F+=4)e[F]=e[F-K],e[F+1]=e[F+1-K],e[F+2]=e[F+2-K],e[F+3]=e[F+3-K];F=X}}}else{var Y,Z=n[(Y=m(g)+4)-4]|n[Y-3]<<8,$=Y+Z;if($>o)throw"unexpected EOF";f&&s(F+Z),e.set(n.subarray(Y,$),F),F+=Z,g=8*$}}while(!p);return F==e.length?e:S(e,0,F)},E=function(r,n){return r[n]|r[n+1]<<8},O=function(r,n){return(r[n]|r[n+1]<<8|r[n+2]<<16)+2*(r[n+3]<<23)},U=function(r){if(31!=r[0]||139!=r[1]||8!=r[2])throw"invalid gzip data";var n=r[3],e=10;4&n&&(e+=r[10]|2+(r[11]<<8));for(var t=(n>>3&1)+(n>>4&1);t>0;t-=!r[e++]);return e+(2&n)},k=function(r){var n=r.length;return(r[n-4]|r[n-3]<<8|r[n-2]<<16)+2*(r[n-1]<<23)},A=function(r){if(8!=(15&r[0])||r[0]>>>4>7||(r[0]<<8|r[1])%31)throw"invalid zlib data";if(32&r[1])throw"invalid zlib data: preset dictionaries not supported"};function D(r,n){return F(r,n)}function T(n,e){return F(n.subarray(U(n),-8),e||new r(k(n)))}_e.gunzipSync=T;function M(r,n){return F((A(r),r.subarray(2,-4)),n)}_e.unzlibSync=M;function j(r,n){var e="";if(!n&&"undefined"!=typeof TextDecoder)return(new TextDecoder).decode(r);for(var t=0;t<r.length;){var a=r[t++];a<128||n?e+=String.fromCharCode(a):a<224?e+=String.fromCharCode((31&a)<<6|63&r[t++]):a<240?e+=String.fromCharCode((15&a)<<12|(63&r[t++])<<6|63&r[t++]):(a=((15&a)<<18|(63&r[t++])<<12|(63&r[t++])<<6|63&r[t++])-65536,e+=String.fromCharCode(55296|a>>10,56320|1023&a))}return e}_e.strFromU8=j;var q=function(r,n){return n+30+E(r,n+26)+E(r,n+28)},B=function(r,n,e){var t=E(r,n+28),a=j(r.subarray(n+46,n+46+t),!(2048&E(r,n+8))),i=n+46+t,o=e?G(r,i):[O(r,n+20),O(r,n+24),O(r,n+42)],f=o[0],u=o[1],v=o[2];return[E(r,n+10),f,u,a,i+E(r,n+30)+E(r,n+32),v]},G=function(r,n){for(;1!=E(r,n);n+=4+E(r,n+2));return[O(r,n+12),O(r,n+4),O(r,n+20)]};_e.unzipSync=function(n){for(var e={},t=n.length-22;101010256!=O(n,t);--t)if(!t||n.length-t>65558)throw"invalid zip file";var a=E(n,t+8);if(!a)return{};var i=O(n,t+16),o=4294967295==i;if(o){if(t=O(n,t-12),101075792!=O(n,t))throw"invalid zip file";a=O(n,t+32),i=O(n,t+48)}for(var f=0;f<a;++f){var u=B(n,i,o),v=u[0],c=u[1],l=u[2],w=u[3],h=u[4],s=u[5],d=q(n,s);if(i=h,v){if(8!=v)throw"unknown compression type "+v;e[w]=D(n.subarray(d,d+c),new r(l))}else e[w]=S(n,d,d+c)}return e};return _e})

fflate.module.min.js:

"use strict";var r=Uint8Array,n=Uint16Array,e=Uint32Array,t=new r([0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,0,0,0,0]),a=new r([0,0,0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13,0,0]),i=new r([16,17,18,0,8,7,9,6,10,5,11,4,12,3,13,2,14,1,15]),o=function(r,t){for(var a=new n(31),i=0;i<31;++i)a[i]=t+=1<<r[i-1];var o=new e(a[30]);for(i=1;i<30;++i)for(var f=a[i];f<a[i+1];++f)o[f]=f-a[i]<<5|i;return[a,o]},f=o(t,2),u=f[0],v=f[1];u[28]=258,v[258]=28;for(var c=o(a,0),l=c[0],w=(c[1],new n(32768)),h=0;h<32768;++h){var s=(43690&h)>>>1|(21845&h)<<1;s=(61680&(s=(52428&s)>>>2|(13107&s)<<2))>>>4|(3855&s)<<4,w[h]=((65280&s)>>>8|(255&s)<<8)>>>1}var d=function(r,e){for(var t=r.length,a=0,i=new n(e);a<t;++a)++i[r[a]-1];var o=new n(e);for(a=0;a<e;++a)o[a]=o[a-1]+i[a-1]<<1;var f=new n(1<<e),u=15-e;for(a=0;a<t;++a)if(r[a])for(var v=a<<4|r[a],c=e-r[a],l=o[r[a]-1]++<<c,h=l|(1<<c)-1;l<=h;++l)f[w[l]>>>u]=v;return f},p=new r(288);for(h=0;h<144;++h)p[h]=8;for(h=144;h<256;++h)p[h]=9;for(h=256;h<280;++h)p[h]=7;for(h=280;h<288;++h)p[h]=8;var g=new r(32);for(h=0;h<32;++h)g[h]=5;var y=d(p,9),b=d(g,5),x=function(r){for(var n=r[0],e=1;e<r.length;++e)r[e]>n&&(n=r[e]);return n},z=function(r,n,e){var t=n/8>>0;return(r[t]|r[t+1]<<8)>>>(7&n)&e},C=function(r,n){var e=n/8>>0;return(r[e]|r[e+1]<<8|r[e+2]<<16)>>>(7&n)},m=function(r){return(r/8>>0)+(7&r&&1)},S=function(t,a,i){(null==a||a<0)&&(a=0),(null==i||i>t.length)&&(i=t.length);var o=new(t instanceof n?n:t instanceof e?e:r)(i-a);return o.set(t.subarray(a,i)),o},F=function(n,e){var o=n.length,f=!e;e||(e=new r(3*o));var v,c,w,h,s=function(n){var t=e.length;if(n>t){var a=new r(Math.max(2*t,n));a.set(e),e=a}},p=0,g=0,F=0;if(p&&!v)return e;var E=8*o;do{p=z(n,g,1);var O=z(n,g+1,3);if(g+=3,O){if(1==O)v=y,c=b,w=9,h=5;else{if(2!=O)throw"invalid block type";var U=z(n,g,31)+257,k=z(n,g+10,15)+4,A=U+z(n,g+5,31)+1;g+=14;for(var D=new r(A),T=new r(19),M=0;M<k;++M)T[i[M]]=z(n,g+3*M,7);g+=3*k;var j=x(T),q=(1<<j)-1,B=d(T,j);for(M=0;M<A;){var G=B[z(n,g,q)];if(g+=15&G,(Y=G>>>4)<16)D[M++]=Y;else{var H=0,I=0;for(16==Y?(I=3+z(n,g,3),g+=2,H=D[M-1]):17==Y?(I=3+z(n,g,7),g+=3):18==Y&&(I=11+z(n,g,127),g+=7);I--;)D[M++]=H}}var J=D.subarray(0,U),K=D.subarray(U);w=x(J),h=x(K),v=d(J,w),c=d(K,h)}if(g>E)throw"unexpected EOF";f&&s(F+131072);for(var L=(1<<w)-1,N=(1<<h)-1;;){var P=(H=v[C(n,g)&L])>>>4;if((g+=15&H)>E)throw"unexpected EOF";if(!H)throw"invalid length/literal";if(P<256)e[F++]=P;else{if(256==P)break;var Q=P-254;if(P>264){var R=t[M=P-257];Q=z(n,g,(1<<R)-1)+u[M],g+=R}var V=c[C(n,g)&N],W=V>>>4;if(!V)throw"invalid distance";g+=15&V;K=l[W];if(W>3){R=a[W];K+=C(n,g)&(1<<R)-1,g+=R}if(g>E)throw"unexpected EOF";f&&s(F+131072);for(var X=F+Q;F<X;F+=4)e[F]=e[F-K],e[F+1]=e[F+1-K],e[F+2]=e[F+2-K],e[F+3]=e[F+3-K];F=X}}}else{var Y,Z=n[(Y=m(g)+4)-4]|n[Y-3]<<8,$=Y+Z;if($>o)throw"unexpected EOF";f&&s(F+Z),e.set(n.subarray(Y,$),F),F+=Z,g=8*$}}while(!p);return F==e.length?e:S(e,0,F)},E=function(r,n){return r[n]|r[n+1]<<8},O=function(r,n){return(r[n]|r[n+1]<<8|r[n+2]<<16)+2*(r[n+3]<<23)},U=function(r){if(31!=r[0]||139!=r[1]||8!=r[2])throw"invalid gzip data";var n=r[3],e=10;4&n&&(e+=r[10]|2+(r[11]<<8));for(var t=(n>>3&1)+(n>>4&1);t>0;t-=!r[e++]);return e+(2&n)},k=function(r){var n=r.length;return(r[n-4]|r[n-3]<<8|r[n-2]<<16)+2*(r[n-1]<<23)},A=function(r){if(8!=(15&r[0])||r[0]>>>4>7||(r[0]<<8|r[1])%31)throw"invalid zlib data";if(32&r[1])throw"invalid zlib data: preset dictionaries not supported"};function D(r,n){return F(r,n)}function T(n,e){return F(n.subarray(U(n),-8),e||new r(k(n)))};export var gunzipSync=T;function M(r,n){return F((A(r),r.subarray(2,-4)),n)};export var unzlibSync=M;function j(r,n){var e="";if(!n&&"undefined"!=typeof TextDecoder)return(new TextDecoder).decode(r);for(var t=0;t<r.length;){var a=r[t++];a<128||n?e+=String.fromCharCode(a):a<224?e+=String.fromCharCode((31&a)<<6|63&r[t++]):a<240?e+=String.fromCharCode((15&a)<<12|(63&r[t++])<<6|63&r[t++]):(a=((15&a)<<18|(63&r[t++])<<12|(63&r[t++])<<6|63&r[t++])-65536,e+=String.fromCharCode(55296|a>>10,56320|1023&a))}return e};export var strFromU8=j;var q=function(r,n){return n+30+E(r,n+26)+E(r,n+28)},B=function(r,n,e){var t=E(r,n+28),a=j(r.subarray(n+46,n+46+t),!(2048&E(r,n+8))),i=n+46+t,o=e?G(r,i):[O(r,n+20),O(r,n+24),O(r,n+42)],f=o[0],u=o[1],v=o[2];return[E(r,n+10),f,u,a,i+E(r,n+30)+E(r,n+32),v]},G=function(r,n){for(;1!=E(r,n);n+=4+E(r,n+2));return[O(r,n+12),O(r,n+4),O(r,n+20)]};export var unzipSync=function(n){for(var e={},t=n.length-22;101010256!=O(n,t);--t)if(!t||n.length-t>65558)throw"invalid zip file";var a=E(n,t+8);if(!a)return{};var i=O(n,t+16),o=4294967295==i;if(o){if(t=O(n,t-12),101075792!=O(n,t))throw"invalid zip file";a=O(n,t+32),i=O(n,t+48)}for(var f=0;f<a;++f){var u=B(n,i,o),v=u[0],c=u[1],l=u[2],w=u[3],h=u[4],s=u[5],d=q(n,s);if(i=h,v){if(8!=v)throw"unknown compression type "+v;e[w]=D(n.subarray(d,d+c),new r(l))}else e[w]=S(n,d,d+c)}return e}

fflate-deflate.min.js (replaces deflate.js):

!function(f){typeof exports=="object"&&typeof module!="undefined"?module.exports=f():typeof define=='function'&&define.amd?define([],f):(typeof window!="undefined"?window:typeof global!="undefined"?global:typeof self!="undefined"&&self).fflateDeflate=f()}(function(){"use strict";var _e={},r=Uint8Array,n=Uint16Array,f=Uint32Array,e=new r([0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,0,0,0,0]),a=new r([0,0,0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13,0,0]),t=new r([16,17,18,0,8,7,9,6,10,5,11,4,12,3,13,2,14,1,15]),o=function(r,e){for(var a=new n(31),t=0;t<31;++t)a[t]=e+=1<<r[t-1];var o=new f(a[30]);for(t=1;t<30;++t)for(var i=a[t];i<a[t+1];++i)o[i]=i-a[t]<<5|t;return[a,o]},i=o(e,2),v=i[0],u=i[1];v[28]=258,u[258]=28;for(var l=o(a,0),s=(l[0],l[1]),c=new n(32768),h=0;h<32768;++h){var w=(43690&h)>>>1|(21845&h)<<1;w=(61680&(w=(52428&w)>>>2|(13107&w)<<2))>>>4|(3855&w)<<4,c[h]=((65280&w)>>>8|(255&w)<<8)>>>1}var g=function(r,f,e){for(var a=r.length,t=0,o=new n(f);t<a;++t)++o[r[t]-1];var i,v=new n(f);for(t=0;t<f;++t)v[t]=v[t-1]+o[t-1]<<1;if(e){i=new n(1<<f);var u=15-f;for(t=0;t<a;++t)if(r[t])for(var l=t<<4|r[t],s=f-r[t],h=v[r[t]-1]++<<s,w=h|(1<<s)-1;h<=w;++h)i[c[h]>>>u]=l}else for(i=new n(a),t=0;t<a;++t)i[t]=c[v[r[t]-1]++]>>>15-r[t];return i},m=new r(288);for(h=0;h<144;++h)m[h]=8;for(h=144;h<256;++h)m[h]=9;for(h=256;h<280;++h)m[h]=7;for(h=280;h<288;++h)m[h]=8;var M=new r(32);for(h=0;h<32;++h)M[h]=5;var y=g(m,9,0),b=g(M,5,0),p=function(r){return(r/8>>0)+(7&r&&1)},d=function(e,a,t){(null==a||a<0)&&(a=0),(null==t||t>e.length)&&(t=e.length);var o=new(e instanceof n?n:e instanceof f?f:r)(t-a);return o.set(e.subarray(a,t)),o},x=function(r,n,f){f<<=7&n;var e=n/8>>0;r[e]|=f,r[e+1]|=f>>>8},A=function(r,n,f){f<<=7&n;var e=n/8>>0;r[e]|=f,r[e+1]|=f>>>8,r[e+2]|=f>>>16},U=function(f,e){for(var a=[],t=0;t<f.length;++t)f[t]&&a.push({s:t,f:f[t]});var o=a.length,i=a.slice();if(!o)return[new r(0),0];if(1==o){var v=new r(a[0].s+1);return v[a[0].s]=1,[v,1]}a.sort((function(r,n){return r.f-n.f})),a.push({s:-1,f:25001});var u=a[0],l=a[1],s=0,c=1,h=2;for(a[0]={s:-1,f:u.f+l.f,l:u,r:l};c!=o-1;)u=a[a[s].f<a[h].f?s++:h++],l=a[s!=c&&a[s].f<a[h].f?s++:h++],a[c++]={s:-1,f:u.f+l.f,l:u,r:l};var w=i[0].s;for(t=1;t<o;++t)i[t].s>w&&(w=i[t].s);var g=new n(w+1),m=k(a[c-1],g,0);if(m>e){t=0;var M=0,y=m-e,b=1<<y;for(i.sort((function(r,n){return g[n.s]-g[r.s]||r.f-n.f}));t<o;++t){var p=i[t].s;if(!(g[p]>e))break;M+=b-(1<<m-g[p]),g[p]=e}for(M>>>=y;M>0;){var d=i[t].s;g[d]<e?M-=1<<e-g[d]++-1:++t}for(;t>=0&&M;--t){var x=i[t].s;g[x]==e&&(--g[x],++M)}m=e}return[new r(g),m]},k=function(r,n,f){return-1==r.s?Math.max(k(r.l,n,f+1),k(r.r,n,f+1)):n[r.s]=f},z=function(r){for(var f=r.length;f&&!r[--f];);for(var e=new n(++f),a=0,t=r[0],o=1,i=function(r){e[a++]=r},v=1;v<=f;++v)if(r[v]==t&&v!=f)++o;else{if(!t&&o>2){for(;o>138;o-=138)i(32754);o>2&&(i(o>10?o-11<<5|28690:o-3<<5|12305),o=0)}else 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fflate-deflate.module.min.js:

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A(f,w,Q[i[K]]),w+=R[i[K]];return A(f,w,Q[256]),w+R[256]},B=new f([65540,131080,131088,131104,262176,1048704,1048832,2114560,2117632]),C=new r(0),D=function(t,o,i,v,l,c){var h=t.length,w=new r(v+h+5*(1+Math.floor(h/7e3))+l),g=w.subarray(v,w.length-l),m=0;if(!o||h<8)for(var M=0;M<=h;M+=65535){var y=M+65535;y<h?m=j(g,m,t.subarray(M,y)):(g[M]=c,m=j(g,m,t.subarray(M,h)))}else{for(var b=B[o-1],x=b>>>13,A=8191&b,U=(1<<i)-1,k=new n(32768),z=new n(U+1),S=Math.ceil(i/3),D=2*S,E=function(r){return(t[r]^t[r+1]<<S^t[r+2]<<D)&U},F=new f(25e3),G=new n(288),H=new n(32),I=0,J=0,K=(M=0,0),L=0,N=0;M<h;++M){var O=E(M),P=32767&M,Q=z[O];if(k[P]=Q,z[O]=P,L<=M){var R=h-M;if((I>7e3||K>24576)&&R>423){m=q(t,g,0,F,G,H,J,K,N,M-N,m),K=I=J=0,N=M;for(var T=0;T<286;++T)G[T]=0;for(T=0;T<30;++T)H[T]=0}var V=2,W=0,X=A,Y=P-Q&32767;if(R>2&&O==E(M-Y))for(var Z=Math.min(x,R)-1,$=Math.min(32767,M),_=Math.min(258,R);Y<=$&&--X&&P!=Q;){if(t[M+V]==t[M+V-Y]){for(var rr=0;rr<_&&t[M+rr]==t[M+rr-Y];++rr);if(rr>V){if(V=rr,W=Y,rr>Z)break;var nr=Math.min(Y,rr-2),fr=0;for(T=0;T<nr;++T){var er=M-Y+T+32768&32767,ar=er-k[er]+32768&32767;ar>fr&&(fr=ar,Q=er)}}}Y+=(P=Q)-(Q=k[P])+32768&32767}if(W){F[K++]=268435456|u[V]<<18|s[W];var tr=31&u[V],or=31&s[W];J+=e[tr]+a[or],++G[257+tr],++H[or],L=M+V,++I}else F[K++]=t[M],++G[t[M]]}}m=q(t,g,c,F,G,H,J,K,N,M-N,m),c||(m=j(g,m,C))}return d(w,0,v+p(m)+l)},E=function(){var r=1,n=0;return{p:function(f){for(var e=r,a=n,t=f.length,o=0;o!=t;){for(var i=Math.min(o+5552,t);o<i;++o)a+=e+=f[o];e%=65521,a%=65521}r=e,n=a},d:function(){return(r>>>8<<16|(255&n)<<8|n>>>8)+2*((255&r)<<23)}}},F=function(r,n,f,e,a){return D(r,null==n.level?6:n.level,null==n.mem?Math.ceil(1.5*Math.max(8,Math.min(13,Math.log(r.length)))):12+n.mem,f,e,!a)},G=function(r,n,f){for(;f;++n)r[n]=f,f>>>=8},H=function(r,n){var f=n.level,e=0==f?0:f<6?1:9==f?3:2;r[0]=120,r[1]=e<<6|(e?32-2*e:1)};function I(r,n){void 0===n&&(n={});var f=E();f.p(r);var e=F(r,n,2,4);return H(e,n),G(e,e.length-4,f.d()),e}export var zlibSync=I

Sorry to waste your time with the bugs @Mugen87!

You have the spec, and you have reality. V8 and Gecko use a 64 bit unsigned integer to store the size of typed arrays, which means a theoretical max of a lot, but they both cap the actual size at 2³¹ on all devices I’ve tested. Node caps it at 2³². No Zip64 data is strictly necessary while still being possible in JavaScript.

I understand that Zip64 is important, so I’ll add support for it. However, this might be a few days of work since it’s a much more messy specification.

Side note: in case @sciecode is still working on this, fflate.unzlibSync(u8Data, new Uint8Array(uncompressedSize)) will work well for you. See the docs.

Also, if you’re still looking into the EXR exporter, try fflateDeflate.zlibSync(u8Data, options). Docs

yep, still plan on finalizing the exporter. I had already taken a note to update current deflate to fflate’s deflate, but thanks for the heads up 👍

I’m not exactly sure what the resize option does, but it seems like an optimization more than anything. I checked its usage in the source code and it seems to change basically nothing; the only difference is allocating a new array of length LEN and copying bytes 0 to LEN into the new array vs. taking the subarray from 0 to LEN directly. If anything, the O(n) allocation + copy would be slower…

I actually took a closer look and found this comment that indicates that it’s a memory optimization. This is applied by default in fflate because if it weren’t, memory would be about 2x worse.

Great! I’ve completed my first PR to migrate loaders from JSZip.js and gunzip.js to fflate.

I change inflate to fflate in a separate PR when the first one was merged.

I see. Okay, thanks!

Yes, that sounds good. I vote to place this file in editor/js/libs as long as it is not required elsewhere.

Can you please also share an updated version of fflate.min.js? We need an UMD version for loaders in examples/js.

Besides, when using the above code I get:

fflate.module.min.js:1 Uncaught ReferenceError: exports is not defined

Turns out the problem was way easier to fix than I thought. Zip64 support was just added; it works on the 3MF files from what i can tell.

New code (4.6kB, 2.3kB gzipped):

"use strict";var r=Uint8Array,n=Uint16Array,e=Uint32Array,t=new r([0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,0,0,0,0]),a=new r([0,0,0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13,0,0]),o=new r([16,17,18,0,8,7,9,6,10,5,11,4,12,3,13,2,14,1,15]),f=function(r,t){for(var a=new n(31),o=0;o<31;++o)a[o]=t+=1<<r[o-1];var f=new e(a[30]);for(o=1;o<30;++o)for(var i=a[o];i<a[o+1];++i)f[i]=i-a[o]<<5|o;return[a,f]},i=f(t,2),u=i[0],v=i[1];u[28]=258,v[258]=28;for(var c=f(a,0),l=c[0],w=(c[1],new n(32768)),h=0;h<32768;++h){var s=(43690&h)>>>1|(21845&h)<<1;s=(61680&(s=(52428&s)>>>2|(13107&s)<<2))>>>4|(3855&s)<<4,w[h]=((65280&s)>>>8|(255&s)<<8)>>>1}var d=function(r,e){for(var t=r.length,a=0,o=new n(e);a<t;++a)++o[r[a]-1];var f=new n(e);for(a=0;a<e;++a)f[a]=f[a-1]+o[a-1]<<1;var i=new n(1<<e),u=15-e;for(a=0;a<t;++a)if(r[a])for(var v=a<<4|r[a],c=e-r[a],l=f[r[a]-1]++<<c,h=l|(1<<c)-1;l<=h;++l)i[w[l]>>>u]=v;return i},g=new r(288);for(h=0;h<144;++h)g[h]=8;for(h=144;h<256;++h)g[h]=9;for(h=256;h<280;++h)g[h]=7;for(h=280;h<288;++h)g[h]=8;var p=new r(32);for(h=0;h<32;++h)p[h]=5;var y=d(g,9),x=d(p,5),b=function(r){for(var n=r[0],e=1;e<r.length;++e)r[e]>n&&(n=r[e]);return n},C=function(r,n,e){var t=n/8>>0;return(r[t]|r[t+1]<<8)>>>(7&n)&e},m=function(r,n){var e=n/8>>0;return(r[e]|r[e+1]<<8|r[e+2]<<16)>>>(7&n)},S=function(r){return(r/8>>0)+(7&r&&1)},z=function(t,a,o){(null==a||a<0)&&(a=0),(null==o||o>t.length)&&(o=t.length);var f=new(t instanceof n?n:t instanceof e?e:r)(o-a);return f.set(t.subarray(a,o)),f},F=function(n,e){var f=n.length,i=!e;e||(e=new r(3*f));var v,c,w,h,s=function(n){var t=e.length;if(n>t){var a=new r(Math.max(2*t,n));a.set(e),e=a}},g=0,p=0,F=0,E=8*f;do{g=C(n,p,1);var O=C(n,p+1,3);if(p+=3,O){if(1==O)v=y,c=x,w=9,h=5;else{if(2!=O)throw"invalid block type";var U=C(n,p,31)+257,k=C(n,p+10,15)+4,A=U+C(n,p+5,31)+1;p+=14;for(var D=new r(A),T=new r(19),M=0;M<k;++M)T[o[M]]=C(n,p+3*M,7);p+=3*k;var j=b(T),q=(1<<j)-1,B=d(T,j);for(M=0;M<A;){var G=B[C(n,p,q)];if(p+=15&G,(Y=G>>>4)<16)D[M++]=Y;else{var H=0,I=0;for(16==Y?(I=3+C(n,p,3),p+=2,H=D[M-1]):17==Y?(I=3+C(n,p,7),p+=3):18==Y&&(I=11+C(n,p,127),p+=7);I--;)D[M++]=H}}var J=D.subarray(0,U),K=D.subarray(U);w=b(J),h=b(K),v=d(J,w),c=d(K,h)}if(p>E)throw"unexpected EOF";i&&s(F+131072);for(var L=(1<<w)-1,N=(1<<h)-1;;){var P=(H=v[m(n,p)&L])>>>4;if((p+=15&H)>E)throw"unexpected EOF";if(!H)throw"invalid length/literal";if(P<256)e[F++]=P;else{if(256==P)break;var Q=P-254;if(P>264){var R=t[M=P-257];Q=C(n,p,(1<<R)-1)+u[M],p+=R}var V=c[m(n,p)&N],W=V>>>4;if(!V)throw"invalid distance";p+=15&V;K=l[W];if(W>3){R=a[W];K+=m(n,p)&(1<<R)-1,p+=R}if(p>E)throw"unexpected EOF";i&&s(F+131072);for(var X=F+Q;F<X;F+=4)e[F]=e[F-K],e[F+1]=e[F+1-K],e[F+2]=e[F+2-K],e[F+3]=e[F+3-K];F=X}}}else{var Y,Z=n[(Y=S(p)+4)-4]|n[Y-3]<<8,$=Y+Z;if($>f)throw"unexpected EOF";i&&s(F+Z),e.set(n.subarray(Y,$),F),F+=Z,p=8*$}}while(!g);return F==e.length?e:z(e,0,F)},E=function(r,n){return r[n]|r[n+1]<<8},O=function(r,n){return(r[n]|r[n+1]<<8|r[n+2]<<16)+2*(r[n+3]<<23)},U=function(r){if(31!=r[0]||139!=r[1]||8!=r[2])throw"invalid gzip data";var n=r[3],e=10;4&n&&(e+=r[10]|2+(r[11]<<8));for(var t=(n>>3&1)+(n>>4&1);t>0;t-=!r[e++]);return e+(2&n)},k=function(r){var n=r.length;return(r[n-4]|r[n-3]<<8|r[n-2]<<16)+2*(r[n-1]<<23)};function A(r,n){return F(r,n)}function D(n,e){return F(n.subarray(U(n),-8),e||new r(k(n)))}export var gunzipSync=D;function T(r,n){var e="";if(!n&&"undefined"!=typeof TextDecoder)return(new TextDecoder).decode(r);for(var t=0;t<r.length;){var a=r[t++];a<128||n?e+=String.fromCharCode(a):a<224?e+=String.fromCharCode((31&a)<<6|63&r[t++]):a<240?e+=String.fromCharCode((15&a)<<12|(63&r[t++])<<6|63&r[t++]):(a=((15&a)<<18|(63&r[t++])<<12|(63&r[t++])<<6|63&r[t++])-65536,e+=String.fromCharCode(55296|a>>10,56320|1023&a))}return e}export var strFromU8=T;var M=function(r,n){return n+30+E(r,n+26)+E(r,n+28)},j=function(r,n,e){var t=E(r,n+28),a=T(r.subarray(n+46,n+46+t),!(2048&E(r,n+8))),o=n+46+t,f=e?q(r,o):[O(r,n+20),O(r,n+24),O(r,n+42)],i=f[0],u=f[1],v=f[2];return[E(r,n+10),i,u,a,o+E(r,n+30)+E(r,n+32),v]},q=function(r,n){for(;1!=E(r,n);n+=4+E(r,n+2));return[O(r,n+12),O(r,n+4),O(r,n+20)]};export var unzipSync=function(n){for(var e={},t=n.length-22;101010256!=O(n,t);--t)if(!t||n.length-t>65558)throw"invalid zip file";var a=E(n,t+8);if(!a)return{};var o=O(n,t+16),f=4294967295==o;if(f){if(t=O(n,t-12),101075792!=O(n,t))throw"invalid zip file";a=O(n,t+32),o=O(n,t+48)}for(var i=0;i<a;++i){var u=j(n,o,f),v=u[0],c=u[1],l=u[2],w=u[3],h=u[4],s=u[5],d=M(n,s);if(o=h,v){if(8!=v)throw"unknown compression type "+v;e[w]=A(n.subarray(d,d+c),new r(l))}else e[w]=z(n,d,d+c)}return e}

Okay, webgl_loader_3mf works now but I get an empty object zip object in webgl_loader_3mf_materials. Please check out:

https://raw.githack.com/Mugen87/three.js/0b388b5f6fa9228425acae87775d3a28088501a9/examples/webgl_loader_3mf_materials.html

Current prod version: https://threejs.org/examples/webgl_loader_3mf_materials

The issue there is that in your source code, you pass an ArrayBuffer to fflate.unzipSync but you need to pass a Uint8Array. To fix the problem, use fflate.unzipSync(new Uint8Array(data)). I applied this hotfix within DevTools and the assets were displayed fine after that. Don’t worry about performance cost, this is a free operation (just creates an interface to view the same chunk of memory without any copying).

Understood, wasn’t aware they changed the api that drastically. Fflate supports both async and sync, for instance fflate.unzipSync(...). It’s smaller (~5kb vs 80kb), faster (they say up to 50%), no module bugs, maintained, seems like a good replacement. For me it’s not so pressing, just wanted to try out TiltLoader really, but maybe if time allows it could be amended. =)

Could this be a problem of Parcel?

I looked, it’s a problem with JSzip: https://github.com/Stuk/jszip/issues/349 The lib appears unmaintained and i don’t think they will fix it. In that case the loader won’t be of much use imo.

Some people have suggested to use https://github.com/101arrowz/fflate instead.

Other projects have moved on as well for the same reason, this PR explains some of the problems with JSZip:

• require cycle
• missing support for es6 modules
• incompatible with Rollup (Parcel, CSB, …)

We do not want to force users into using npm for just working with the example code. Ideally, they can download the repository and host it on a local webserver.

Not complaining, i was just curious, i just hope at some point in the future this will be re-considered because JSM has incredible value that is held back atm.

import JSZip from ‘three/examples/jsm/libs/jszip.module.min.js’

If we do this, the example would report:

Uncaught SyntaxError: The requested module ‘…/libs/jszip.module.min.js’ does not provide an export named ‘default’

So it seems the current import is correct. Could this be a problem of Parcel?

Why would threejs use a local copy?

We do not want to force users into using npm for just working with the example code. Ideally, they can download the repository and host it on a local webserver.