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crunch-worker.js
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124 lines (102 loc) · 78.2 KB
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// From Brandon Jones' awesome WebGL texture utils,
// https://github.com/toji/webgl-texture-utils
// which in turn based off of Evan Parker's cool work,
// http://www-cs-students.stanford.edu/~eparker/files/crunch/decode_test.html
//
// This combines crunch-worker.js and crn_decomp.js. Minor changes
// to make it work that way, and to return all levels in one array
/*
* Copyright (c) 2012 Brandon Jones
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
*
* 2. Altered source versions must be plainly marked as such, and must not
* be misrepresented as being the original software.
*
* 3. This notice may not be removed or altered from any source
* distribution.
*/
// Taken from crnlib.h
var cCRNFmtInvalid = -1;
var cCRNFmtDXT1 = 0;
var cCRNFmtDXT3 = 1;
var cCRNFmtDXT5 = 2;
// Various DXT5 derivatives
var cCRNFmtDXT5_CCxY = 3; // Luma-chroma
var cCRNFmtDXT5_xGxR = 4; // Swizzled 2-component
var cCRNFmtDXT5_xGBR = 5; // Swizzled 3-component
var cCRNFmtDXT5_AGBR = 6; // Swizzled 4-component
// ATI 3DC and X360 DXN
var cCRNFmtDXN_XY = 7;
var cCRNFmtDXN_YX = 8;
// DXT5 alpha blocks only
var cCRNFmtDXT5A = 9;
function arrayBufferCopy(src, dst, dstByteOffset, numBytes) {
dst.set(src.subarray(0, numBytes), dstByteOffset);
}
function deCrunch(bytes, filename) {
var srcSize = bytes.length;
var src = Module._malloc(srcSize),
format, internalFormat, dst, dstSize,
width, height, levels, dxtData, rgb565Data, i;
arrayBufferCopy(bytes, Module.HEAPU8, src, srcSize);
format = Module._crn_get_dxt_format(src, srcSize);
if(format != cCRNFmtDXT1 && format != cCRNFmtDXT3 && format != cCRNFmtDXT5) {
throw "Unsupported image format " + format + " for " + filename;
}
width = Module._crn_get_width(src, srcSize);
height = Module._crn_get_height(src, srcSize);
levels = Module._crn_get_levels(src, srcSize);
dstSize = Module._crn_get_uncompressed_size(src, srcSize, 0);
dst = Module._malloc(dstSize);
var totalSize = 0;
var bytesPerPixel = format == cCRNFmtDXT1 ? 0.5 : 1;
for(i = 0; i < levels; ++i) {
totalSize += width * height * bytesPerPixel;
width *= 0.5;
height *= 0.5;
width = Math.max(width, 4);
height = Math.max(height, 4);
}
width = Module._crn_get_width(src, srcSize);
height = Module._crn_get_height(src, srcSize);
var ret = new Uint8Array(totalSize);
var retIndex = 0;
for(i = 0; i < levels; ++i) {
if(i) {
dstSize = Module._crn_get_uncompressed_size(src, srcSize, i);
}
Module._crn_decompress(src, srcSize, dst, dstSize, i);
ret.set(Module.HEAPU8.subarray(dst, dst+dstSize), retIndex);
retIndex += dstSize;
width *= 0.5;
height *= 0.5;
}
Module._free(src);
Module._free(dst);
return ret;
}
//===
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wb(b){print(b+":\n"+Error().stack);a("Assertion: "+b)}function Ya(b,c){b||wb("Assertion failed: "+c)}var Mb=this;Module.ccall=(function(b,c,d,e){try{var g=eval("_"+b)}catch(h){try{g=Mb.Module["_"+b]}catch(j){}}Ya(g,"Cannot call unknown function "+b+" (perhaps LLVM optimizations or closure removed it?)");var i=0,b=e?e.map((function(b){if(d[i++]=="string"){var c=q;cb(b.length+1);Nb(b,c);b=c}return b})):[];return(function(b,c){return c=="string"?Vb(b):b})(g.apply(pa,b),c)});function Wb(b,c,d){d=d||"i8";d[d.length-1]==="*"&&(d="i32");switch(d){case"i1":v[b]=c;break;case"i8":v[b]=c;break;case"i16":gb[b>>1]=c;break;case"i32":y[b>>2]=c;break;case"i64":y[b>>2]=c;break;case"float":lb[b>>2]=c;break;case"double":Yb[0]=c;y[b>>2]=Zb[0];y[b+4>>2]=Zb[1];break;default:wb("invalid type for setValue: "+d)}}Module.setValue=Wb;Module.getValue=(function(b,c){c=c||"i8";c[c.length-1]==="*"&&(c="i32");switch(c){case"i1":return v[b];case"i8":return v[b];case"i16":return gb[b>>1];case"i32":return 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c=b.shift(),d=c.r;typeof d==="number"&&(d=dc[d]);d(c.da===aa?pa:c.da)}}var pc=[],qc=[];function rc(b,c){return Array.prototype.slice.call(v.subarray(b,b+c))}Module.Array_copy=rc;Module.TypedArray_copy=(function(b,c){for(var d=new Uint8Array(c),e=0;e<c;++e){d[e]=v[b+e]}return d.buffer});function sc(b){for(var c=0;v[b+c];){c++}return c}Module.String_len=sc;function tc(b,c){var d=sc(b);c&&d++;var e=rc(b,d);c&&(e[d-1]=0);return e}Module.String_copy=tc;function jc(b,c){for(var d=[],e=0;e<b.length;){var g=b.charCodeAt(e);g>255&&(g=g&255);d.push(g);e=e+1}c||d.push(0);return d}Module.intArrayFromString=jc;Module.intArrayToString=(function(b){for(var c=[],d=0;d<b.length;d++){var e=b[d];e>255&&(e=e&255);c.push(String.fromCharCode(e))}return c.join("")});function Nb(b,c,d){for(var e=0;e<b.length;){var g=b.charCodeAt(e);g>255&&(g=g&255);v[c+e]=g;e=e+1}d||(v[c+e]=0)}Module.writeStringToMemory=Nb;var M=[];function uc(b,c){return b>=0?b:c<=32?2*Math.abs(1<<c-1)+b:Math.pow(2,c)+b}function vc(b,c){if(b<=0){return b}var d=c<=32?Math.abs(1<<c-1):Math.pow(2,c-1);if(b>=d&&(c<=32||b>d)){b=-2*d+b}return b}function wc(b){b=b-1|0;b=b>>>16|b;b=b>>>8|b;b=b>>>4|b;b=b>>>2|b;return(b>>>1|b)+1|0}function xc(b,c){var d=M.O|0,e=q;q=q+512;for(var g=e|0,d=(vb=q,q=q+12,y[vb>>2]=d,y[vb+4>>2]=c,y[vb+8>>2]=b,vb),d=yc(M.G|0,d),h=d.length,j=0;j<h;j++){v[g+j]=d[j]}v[g+j]=0;h=(vb=q,q=q+1,q=q+3>>2<<2,y[vb>>2]=0,vb);d=y[zc>>2];j=yc(g,h);g=q;h=G(j,"i8",$b);j=j.length*1;if(j!=0&&Dc(d,h,j)==-1&&Ec[d]){Ec[d].error=l}q=g;q=e}function Fc(b,c,d,e,g){var h,j,i=q;q=q+4;var f=b+4|0;j=(b+8|0)>>2;C[f>>2]>>>0>C[j]>>>0&&xc(M.H|0,2121);Math.floor(2147418112/(e>>>0))>>>0>c>>>0||xc(M.T|0,2122);var k=C[j],o=k>>>0<c>>>0;do{if(o){var m=d?((c|0)==0?0:(c-1&c|0)==0)?c:wc(c):c;(m|0)!=0&m>>>0>k>>>0||xc(M.Y|0,2131);var t=m*e|0;if((g|0)==0){h=b|0;var s,w=y[h>>2],u=t,r=i;s=q;q=q+4;if((w&7|0)==0){if(u>>>0>2147418112){xc(M.m|0,2500);r=0}else{y[s>>2]=u;w=dc[y[Gc>>2]](w,u,s,1,y[Hc>>2]);(r|0)!=0&&(y[r>>2]=y[s>>2]);(w&7|0)!=0&&xc(M.n|0,2552);r=w}}else{xc(M.J|0,2500);r=0}q=s;s=r;if((s|0)==0){m=0;break}y[h>>2]=s}else{s=Ic(t,i);if((s|0)==0){m=0;break}h=(b|0)>>2;dc[g](s,y[h],y[f>>2]);r=y[h];(r|0)!=0&&Jc(r);y[h]=s}h=C[i>>2];y[j]=h>>>0>t>>>0?Math.floor((h>>>0)/(e>>>0)):m}m=1}while(0);q=i;return m}Fc.X=1;function Ic(b,c){var d=q;q=q+4;var e=b+3&-4,e=(e|0)==0?4:e;if(e>>>0>2147418112){xc(M.m|0,2500);e=0}else{y[d>>2]=e;var g=dc[y[Gc>>2]](0,e,d,1,y[Hc>>2]),h=C[d>>2];(c|0)!=0&&(y[c>>2]=h);if((g|0)==0|h>>>0<e>>>0){xc(M.I|0,2500);e=0}else{(g&7|0)!=0&&xc(M.n|0,2527);e=g}}q=d;return e}function Jc(b){if((b|0)!=0){if((b&7|0)==0){dc[y[Gc>>2]](b,0,0,1,y[Hc>>2])}else{xc(M.K|0,2500)}}}function Kc(b,c,d,e){var g,h,j,i,f=b>>2,k=q;q=q+200;var o;i=k>>2;var m=k+64;j=m>>2;var t=k+132,s=(c|0)==0|e>>>0>11;a:do{if(s){var w=0}else{y[f]=c;bc(m,0,68);for(var u=0;;){var r=z[d+u|0];if(r<<24>>24!=0){var x=((r&255)<<2)+m|0;y[x>>2]=y[x>>2]+1|0}var p=u+1|0;if((p|0)==(c|0)){var B=1,I=-1,S=0,Q=0,H=0;break}u=p}for(;;){var J=C[(B<<2>>2)+j];if((J|0)==0){y[((B-1<<2)+28>>2)+f]=0;var K=H,E=Q,da=S,N=I}else{var ka=I>>>0<B>>>0?I:B,ba=S>>>0>B>>>0?S:B,ra=B-1|0;y[(ra<<2>>2)+i]=H;var ia=J+H|0,fa=16-B|0;y[((ra<<2)+28>>2)+f]=(ia-1<<fa|(1<<fa)-1)+1|0;y[((ra<<2)+96>>2)+f]=Q;y[t+(B<<2)>>2]=Q;K=ia;E=J+Q|0;da=ba;N=ka}var Ga=B+1|0;if((Ga|0)==17){break}B=Ga;I=N;S=da;Q=E;H=K<<1}y[f+1]=E;h=(b+172|0)>>2;if(E>>>0>C[h]>>>0){var ta=((E|0)==0?0:(E-1&E|0)==0)?E:c>>>0<wc(E)>>>0?c:wc(E);y[h]=ta;var la=b+176|0,Aa=y[la>>2];if((Aa|0)==0){var xa=ta}else{Lc(Aa);xa=y[h]}var Y,ma=(xa|0)==0?1:xa,ga=Ic((ma<<1)+8|0,0);if((ga|0)==0){var ua=0}else{var Ba=ga+8|0;y[ga+4>>2]=ma;y[ga>>2]=ma^-1;ua=Ba}Y=ua;y[la>>2]=Y;if((Y|0)==0){w=0;break}var Ca=la}else{Ca=b+176|0}var va=b+24|0;v[va]=N&255;v[b+25|0]=da&255;for(var Z=0;;){var sa=z[d+Z|0],T=sa&255;if(sa<<24>>24!=0){(y[(T<<2>>2)+j]|0)==0&&xc(M.Z|0,2274);var 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N=R(f,d),ka=da<<1,ba=(ka<<2)+h|0;y[ba>>2]=y[ba>>2]+y[e+(N<<2)>>2]&7;ka=((ka|1)<<2)+h|0;y[ka>>2]=y[ka>>2]+y[g+(N<<2)>>2]&7;da=da+1|0;if((da|0)==8){break}}gb[c]=(z[M.a+y[m>>2]|0]&255)<<3|z[M.a+y[o>>2]|0]&255|(z[M.a+y[k>>2]|0]&255)<<6|(z[M.a+y[t>>2]|0]&255)<<9|(z[M.a+y[s>>2]|0]&255)<<12|(z[M.a+y[w>>2]|0]&255)<<15;gb[c+1]=(z[M.a+y[u>>2]|0]&255)<<2|(z[M.a+y[w>>2]|0]&255)>>>1|(z[M.a+y[r>>2]|0]&255)<<5|(z[M.a+y[x>>2]|0]&255)<<8|(z[M.a+y[p>>2]|0]&255)<<11|(z[M.a+y[B>>2]|0]&255)<<14;gb[c+2]=(z[M.a+y[I>>2]|0]&255)<<1|(z[M.a+y[B>>2]|0]&255)>>>2|(z[M.a+y[S>>2]|0]&255)<<4|(z[M.a+y[Q>>2]|0]&255)<<7|(z[M.a+y[H>>2]|0]&255)<<10|(z[M.a+y[J>>2]|0]&255)<<13;E=E+1|0;if((E|0)==(i|0)){ra=1;break a}K=K+6|0;c=K>>1}}}else{var ra=0}}else{ra=0}}while(0);Vc(d);b=ra}else{b=0}q=d;return b}pd.X=1;function ac(b){if(b>>>0<245){var c=b>>>0<11?16:b+11&-8,d=c>>>3,b=C[X>>2],e=b>>>(d>>>0);if((e&3|0)!=0){var 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j=j>>>(d>>>0),i=j>>>1&1,e=g=C[X+((g|e|h|d|i)+(j>>>(i>>>0))<<2)+304>>2];d=e>>2;g=(y[g+4>>2]&-8)-b|0;a:for(;;){for(h=e;;){j=y[h+16>>2];if((j|0)==0){h=y[h+20>>2];if((h|0)==0){break a}}else{h=j}j=(y[h+4>>2]&-8)-b|0;if(j>>>0<g>>>0){e=h;d=e>>2;g=j;continue a}}}var j=e,f=C[X+16>>2],i=j>>>0<f>>>0;do{if(!i){var k=j+b|0,h=k;if(j>>>0<k>>>0){var i=C[d+6],k=C[d+3],o=(k|0)==(e|0);do{if(o){c=e+20|0;var m=y[c>>2];if((m|0)==0){c=e+16|0;m=y[c>>2];if((m|0)==0){m=0;c=m>>2;break}}for(;;){var t=m+20|0,s=y[t>>2];if((s|0)==0){t=m+16|0;s=C[t>>2];if((s|0)==0){break}}c=t;m=s}if(c>>>0<f>>>0){$();a("Reached an unreachable!")}y[c>>2]=0}else{c=C[d+2];if(c>>>0<f>>>0){$();a("Reached an unreachable!")}y[c+12>>2]=k;y[k+8>>2]=c;m=k}c=m>>2}while(0);f=(i|0)==0;a:do{if(!f){k=e+28|0;o=(y[k>>2]<<2)+X+304|0;t=(e|0)==(y[o>>2]|0);do{if(t){y[o>>2]=m;if((m|0)!=0){break}y[X+4>>2]=y[X+4>>2]&(1<<y[k>>2]^-1);break a}if(i>>>0<C[X+16>>2]>>>0){$();a("Reached an 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e=(y[X+440>>2]&4|0)==0;do{if(e){d=y[X+24>>2];if((d|0)==0){d=6}else{d=Ed(d);if((d|0)==0){d=6}else{var g=y[Cd+8>>2],g=b+47-y[X+12>>2]+g&-g;if(g>>>0<2147483647){var h=Fd(g);if((h|0)==(y[d>>2]+y[d+4>>2]|0)){var j=h,i=g;c=h;d=13}else{var f=h,k=g;d=15}}else{d=14}}}if(d==6){d=Fd(0);if((d|0)==-1){d=14}else{var g=y[Cd+8>>2],g=g+(b+47)&-g,h=d,o=y[Cd+4>>2],m=o-1|0,g=(m&h|0)==0?g:g-h+(m+h&-o)|0;if(g>>>0<2147483647){h=Fd(g);if((h|0)==(d|0)){j=d;i=g;c=h;d=13}else{f=h;k=g;d=15}}else{d=14}}}if(d==13){if((j|0)!=-1){var t=i,s=j;d=26;break}f=c;k=i}else{if(d==14){y[X+440>>2]=y[X+440>>2]|4;d=23;break}}d=-k|0;if((f|0)!=-1&k>>>0<2147483647){if(k>>>0<(b+48|0)>>>0){g=y[Cd+8>>2];g=b+47-k+g&-g;if(g>>>0<2147483647){if((Fd(g)|0)==-1){Fd(d);d=22}else{w=g+k|0;d=21}}else{w=k;d=21}}else{var 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