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  • Committer: Package Import Robot
  • Author(s): Sylvestre Ledru
  • Date: 2013-05-02 13:11:51 UTC
  • Revision ID: package-import@ubuntu.com-20130502131151-q8dvteqr1ef2x7xz
Tags: upstream-1.4.1~20130504~adb56cb
Import upstream version 1.4.1~20130504~adb56cb

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tools/crunch-worker.js
 
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// From Brandon Jones' awesome WebGL texture utils,
 
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// https://github.com/toji/webgl-texture-utils
 
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// which in turn based off of Evan Parker's cool work,
 
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// http://www-cs-students.stanford.edu/~eparker/files/crunch/decode_test.html
 
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//
 
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// This combines crunch-worker.js and crn_decomp.js. Minor changes
 
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// to make it work that way, and to return all levels in one array
 
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    /*
 
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     * Copyright (c) 2012 Brandon Jones
 
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     *
 
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     * This software is provided 'as-is', without any express or implied
 
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     * warranty. In no event will the authors be held liable for any damages
 
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     * arising from the use of this software.
 
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     *
 
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     * Permission is granted to anyone to use this software for any purpose,
 
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     * including commercial applications, and to alter it and redistribute it
 
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     * freely, subject to the following restrictions:
 
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     *
 
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     *    1. The origin of this software must not be misrepresented; you must not
 
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     *    claim that you wrote the original software. If you use this software
 
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     *    in a product, an acknowledgment in the product documentation would be
 
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     *    appreciated but is not required.
 
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     *
 
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     *    2. Altered source versions must be plainly marked as such, and must not
 
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     *    be misrepresented as being the original software.
 
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     *
 
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     *    3. This notice may not be removed or altered from any source
 
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     *    distribution.
 
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     */
 
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    // Taken from crnlib.h
 
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    var cCRNFmtInvalid = -1;
 
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    var cCRNFmtDXT1 = 0;
 
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    var cCRNFmtDXT3 = 1;
 
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    var cCRNFmtDXT5 = 2;
 
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    // Various DXT5 derivatives
 
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    var cCRNFmtDXT5_CCxY = 3;    // Luma-chroma
 
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    var cCRNFmtDXT5_xGxR = 4;    // Swizzled 2-component
 
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    var cCRNFmtDXT5_xGBR = 5;    // Swizzled 3-component
 
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    var cCRNFmtDXT5_AGBR = 6;    // Swizzled 4-component
 
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    // ATI 3DC and X360 DXN
 
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    var cCRNFmtDXN_XY = 7;
 
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    var cCRNFmtDXN_YX = 8;
 
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    // DXT5 alpha blocks only
 
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    var cCRNFmtDXT5A = 9;
 
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    function arrayBufferCopy(src, dst, dstByteOffset, numBytes) {
 
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        dst.set(src.subarray(0, numBytes), dstByteOffset);
 
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    }
 
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    function deCrunch(bytes, filename) {
 
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        var srcSize = bytes.length;
 
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        var src = Module._malloc(srcSize),
 
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            format, internalFormat, dst, dstSize,
 
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            width, height, levels, dxtData, rgb565Data, i;
 
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        arrayBufferCopy(bytes, Module.HEAPU8, src, srcSize);
 
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        format = Module._crn_get_dxt_format(src, srcSize);
 
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        if(format != cCRNFmtDXT1 && format != cCRNFmtDXT3 && format != cCRNFmtDXT5) {
 
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            throw "Unsupported image format " + format + " for " + filename;
 
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        }
 
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        width = Module._crn_get_width(src, srcSize);
 
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        height = Module._crn_get_height(src, srcSize);
 
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        levels = Module._crn_get_levels(src, srcSize);
 
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        dstSize = Module._crn_get_uncompressed_size(src, srcSize, 0);
 
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        dst = Module._malloc(dstSize);
 
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        var totalSize = 0;
 
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        var bytesPerPixel = format == cCRNFmtDXT1 ? 0.5 : 1;
 
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        for(i = 0; i < levels; ++i) {
 
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            totalSize += width * height * bytesPerPixel;
 
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            width *= 0.5;
 
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            height *= 0.5;
 
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            width = Math.max(width, 4);
 
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            height = Math.max(height, 4);
 
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        }
 
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        width = Module._crn_get_width(src, srcSize);
 
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        height = Module._crn_get_height(src, srcSize);
 
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        var ret = new Uint8Array(totalSize);
 
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        var retIndex = 0;
 
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        for(i = 0; i < levels; ++i) {
 
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            if(i) {
 
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                dstSize = Module._crn_get_uncompressed_size(src, srcSize, i);
 
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            }
 
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            Module._crn_decompress(src, srcSize, dst, dstSize, i);
 
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            ret.set(Module.HEAPU8.subarray(dst, dst+dstSize), retIndex);
 
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            retIndex += dstSize;
 
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            width *= 0.5;
 
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            height *= 0.5;
 
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        }
 
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        Module._free(src);
 
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        Module._free(dst);
 
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        return ret;
 
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    }
 
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    //===
 
110
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ib;La=zb}else{var Qb=La+16|0,Rb=C[Qb>>2];if((Rb|0)==0){break}Ka=Qb;La=Rb}}if(Ka>>>0<C[X+16>>2]>>>0){$();a("Reached an unreachable!")}y[Ka>>2]=0;ha=La}else{var $a=C[i+j];if($a>>>0<C[X+16>>2]>>>0){$();a("Reached an unreachable!")}y[$a+12>>2]=Ra;y[Ra+8>>2]=$a;ha=Ra}c=ha>>2}while(0);if((Ha|0)!=0){var Sb=r+(b+20)|0,Tb=(y[Sb>>2]<<2)+X+304|0,cc=(hb|0)==(y[Tb>>2]|0);do{if(cc){y[Tb>>2]=ha;if((ha|0)!=0){break}y[X+4>>2]=y[X+4>>2]&(1<<y[Sb>>2]^-1);break c}if(Ha>>>0<C[X+16>>2]>>>0){$();a("Reached an unreachable!")}var Ab=Ha+16|0;(y[Ab>>2]|0)==(hb|0)?y[Ab>>2]=ha:y[Ha+20>>2]=ha;if((ha|0)==0){break c}}while(0);if(ha>>>0<C[X+16>>2]>>>0){$();a("Reached an unreachable!")}y[c+6]=Ha;var bb=C[j+(i+2)];if((bb|0)!=0){if(bb>>>0<C[X+16>>2]>>>0){$();a("Reached an unreachable!")}y[c+4]=bb;y[bb+24>>2]=ha}var ab=C[j+(i+3)];if((ab|0)!=0){if(ab>>>0<C[X+16>>2]>>>0){$();a("Reached an unreachable!")}y[c+5]=ab;y[ab+24>>2]=ha}}}}while(0);y[e+1]=oa|1;y[O+oa>>2]=oa;if((K|0)!=(y[X+20>>2]|0)){var Ia=oa}else{y[X+8>>2]=oa;break a}}else{y[qa>>2]=na&-2;y[e+1]=E|1;Ia=y[O+E>>2]=E}}while(0);if(Ia>>>0<256){var Bb=Ia>>>2&1073741822,Cb=(Bb<<2)+X+40|0,Db=C[X>>2],ob=1<<(Ia>>>3);if((Db&ob|0)==0){y[X>>2]=Db|ob;var pb=Cb,Eb=(Bb+2<<2)+X+40|0}else{var Fb=(Bb+2<<2)+X+40|0,qb=C[Fb>>2];if(qb>>>0<C[X+16>>2]>>>0){$();a("Reached an unreachable!")}pb=qb;Eb=Fb}y[Eb>>2]=K;y[pb+12>>2]=K;y[e+2]=pb;y[e+3]=Cb;break a}var jb=K,rb=Ia>>>8;if((rb|0)==0){var Sa=0}else{if(Ia>>>0>16777215){Sa=31}else{var Pa=(rb+1048320|0)>>>16&8,sb=rb<<Pa,Ta=(sb+520192|0)>>>16&4,Gb=sb<<Ta,Hb=(Gb+245760|0)>>>16&2,Ib=14-(Ta|Pa|Hb)+(Gb<<Hb>>>15)|0,Sa=Ia>>>((Ib+7|0)>>>0)&1|Ib<<1}}var tb=(Sa<<2)+X+304|0;y[e+7]=Sa;y[e+5]=0;y[e+4]=0;var Jb=y[X+4>>2],Kb=1<<Sa,Lb=(Jb&Kb|0)==0;c:do{if(Lb){y[X+4>>2]=Jb|Kb;y[tb>>2]=jb;y[e+6]=tb;y[e+3]=K;y[e+2]=K}else{for(var kb=Ia<<((Sa|0)==31?0:25-(Sa>>>1)|0),Ua=y[tb>>2];;){if((y[Ua+4>>2]&-8|0)==(Ia|0)){var Ub=Ua+8|0,Va=C[Ub>>2],nb=C[X+16>>2],Ac=Ua>>>0<nb>>>0;do{if(!Ac&&Va>>>0>=nb>>>0){y[Va+12>>2]=jb;y[Ub>>2]=jb;y[e+2]=Va;y[e+3]=Ua;y[e+6]=0;break c}}while(0);$();a("Reached an unreachable!")}var Xb=(kb>>>31<<2)+Ua+16|0,oc=C[Xb>>2];if((oc|0)==0){if(Xb>>>0>=C[X+16>>2]>>>0){y[Xb>>2]=jb;y[e+6]=Ua;y[e+3]=K;y[e+2]=K;break c}$();a("Reached an unreachable!")}kb=kb<<1;Ua=oc}}}while(0);var Bc=y[X+32>>2]-1|0;y[X+32>>2]=Bc;if((Bc|0)!=0){break a}var gc=y[X+452>>2],Cc=(gc|0)==0;c:do{if(!Cc){for(var Td=gc;;){var Ud=y[Td+8>>2];if((Ud|0)==0){break c}Td=Ud}}}while(0);y[X+32>>2]=-1;break a}}}}}while(0);$();a("Reached an unreachable!")}}while(0)}Module._free=Ld;Ld.X=1;function Md(b,c){var d,e,g,h=c>>>0>4294967231;a:do{if(h){y[Jd>>2]=12;var j=0}else{g=d=b-8|0;e=(b-4|0)>>2;var i=C[e],f=i&-8,k=f-8|0,o=b+k|0,m=d>>>0<C[X+16>>2]>>>0;do{if(!m){var t=i&3;if((t|0)!=1&(k|0)>-8){d=(b+(f-4)|0)>>2;if((y[d]&1|0)!=0){h=c>>>0<11?16:c+11&-8;if((t|0)==0){var s=0,w,i=y[g+4>>2]&-8;w=h>>>0<256?0:i>>>0>=(h+4|0)>>>0&&(i-h|0)>>>0<=y[Cd+8>>2]<<1>>>0?g:0;g=17}else{if(f>>>0<h>>>0){if((o|0)!=(y[X+24>>2]|0)){g=21}else{d=y[X+12>>2]+f|0;if(d>>>0>h>>>0){s=d-h|0;w=b+(h-8)|0;y[e]=h|i&1|2;y[b+(h-4)>>2]=s|1;y[X+24>>2]=w;y[X+12>>2]=s;s=0;w=g;g=17}else{g=21}}}else{s=f-h|0;if(s>>>0>15){y[e]=h|i&1|2;y[b+(h-4)>>2]=s|3;y[d]=y[d]|1;s=b+h|0}else{s=0}w=g;g=17}}do{if(g==17&&(w|0)!=0){(s|0)!=0&&Ld(s);j=w+8|0;break a}}while(0);g=ac(c);if((g|0)==0){j=0;break a}e=f-((y[e]&3|0)==0?8:4)|0;f=g;i=b;e=e>>>0<c>>>0?e:c;if(e>=20&&i%2==f%2){if(i%4==f%4){for(e=i+e;i%4;){v[f++]=v[i++]}i=i>>2;f=f>>2;for(s=e>>2;i<s;){y[f++]=y[i++]}i=i<<2;for(f=f<<2;i<e;){v[f++]=v[i++]}}else{e=i+e;i%2&&(v[f++]=v[i++]);i=i>>1;f=f>>1;for(s=e>>1;i<s;){gb[f++]=gb[i++]}i=i<<1;f=f<<1;i<e&&(v[f++]=v[i++])}}else{for(;e--;){v[f++]=v[i++]}}Ld(b);j=g;break a}}}}while(0);$();a("Reached an unreachable!")}}while(0);return j}Md.X=1;function Dd(){if((y[Cd>>2]|0)==0){var b=Nd();if((b-1&b|0)==0){y[Cd+8>>2]=b;y[Cd+4>>2]=b;y[Cd+12>>2]=-1;y[Cd+16>>2]=2097152;y[Cd+20>>2]=0;y[X+440>>2]=0;y[Cd>>2]=Math.floor(Date.now()/1e3)&-16^1431655768}else{$();a("Reached an unreachable!")}}}function Od(b){if((b|0)==0){b=0}else{var b=y[b-4>>2],c=b&3,b=(c|0)==1?0:(b&-8)-((c|0)==0?8:4)|0}return b}function Ed(b){var c,d=X+444|0;for(c=d>>2;;){var e=C[c];if(e>>>0<=b>>>0&&(e+y[c+1]|0)>>>0>b>>>0){var g=d;break}c=C[c+2];if((c|0)==0){g=0;break}d=c;c=d>>2}return g}function Gd(b,c){var d=b+8|0,d=(d&7|0)==0?0:-d&7,e=c-d|0;y[X+24>>2]=b+d|0;y[X+12>>2]=e;y[d+(b+4)>>2]=e|1;y[c+(b+4)>>2]=40;y[X+28>>2]=y[Cd+16>>2]}function Hd(b,c,d){var e,g,h,j=c>>2,i=b>>2,f,k=b+8|0,k=(k&7|0)==0?0:-k&7;g=c+8|0;var o=(g&7|0)==0?0:-g&7;h=o>>2;var m=c+o|0,t=k+d|0;g=t>>2;var s=b+t|0,w=m-(b+k)-d|0;y[(k+4>>2)+i]=d|3;d=(m|0)==(y[X+24>>2]|0);a:do{if(d){var u=y[X+12>>2]+w|0;y[X+12>>2]=u;y[X+24>>2]=s;y[g+(i+1)]=u|1}else{if((m|0)==(y[X+20>>2]|0)){u=y[X+8>>2]+w|0;y[X+8>>2]=u;y[X+20>>2]=s;y[g+(i+1)]=u|1;y[(b+u+t|0)>>2]=u}else{var r=C[h+(j+1)];if((r&3|0)==1){var u=r&-8,x=r>>>3,p=r>>>0<256;b:do{if(p){var B=C[((o|8)>>2)+j],I=C[h+(j+3)];if((B|0)==(I|0)){y[X>>2]=y[X>>2]&(1<<x^-1)}else{var S=((r>>>2&1073741822)<<2)+X+40|0;f=(B|0)==(S|0)?15:B>>>0<C[X+16>>2]>>>0?18:15;d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111
 
 
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    //===
 
113
 
 
114
onmessage = function(msg) {
 
115
  var start = Date.now();
 
116
  var data = deCrunch(new Uint8Array(msg.data.data), msg.data.filename);
 
117
  postMessage({
 
118
    filename: msg.data.filename,
 
119
    data: data,
 
120
    callbackID: msg.data.callbackID,
 
121
    time: Date.now() - start
 
122
  });
 
123
};
 
124