@dualbox/dualbox-lib-upng/dist/browser/browser.min.js

PNG encoder/decoder

require=function n(s,o,l){function d(t,e){if(!o[t]){if(!s[t]){var a="function"==typeof require&&require;if(!e&&a)return a(t,!0);if(u)return u(t,!0);var i=new Error("Cannot find module '"+t+"'");throw i.code="MODULE_NOT_FOUND",i}var r=o[t]={exports:{}};s[t][0].call(r.exports,function(e){return d(s[t][1][e]||e)},r,r.exports,n,s,o,l)}return o[t].exports}for(var u="function"==typeof require&&require,e=0;e<l.length;e++)d(l[e]);return d}({"@dualbox/dualbox-lib-upng":[function(e,t,a){"use strict";var M={},f=e("pako");M.toRGBA8=function(e){var t=e.width,a=e.height,i=t*a,r=M.decode._getBPP(e),n=Math.ceil(t*r/8),s=new Uint8Array(4*i),o=new Uint32Array(s.buffer),l=e.data,d=e.ctype,u=e.depth,f=M._bin.readUshort;if(6==d){var h=i<<2;if(8==u)for(var _=0;_<h;_++)s[_]=l[_];if(16==u)for(_=0;_<h;_++)s[_]=l[_<<1]}else if(2==d){var c=e.tabs.tRNS,b=-1,m=-1,p=-1;if(c&&(b=c[0],m=c[1],p=c[2]),8==u)for(_=0;_<i;_++){var g=3*_;s[U=_<<2]=l[g],s[U+1]=l[g+1],s[U+2]=l[g+2],s[U+3]=255,-1!=b&&l[g]==b&&l[g+1]==m&&l[g+2]==p&&(s[U+3]=0)}if(16==u)for(_=0;_<i;_++)g=6*_,s[U=_<<2]=l[g],s[U+1]=l[g+2],s[U+2]=l[g+4],s[U+3]=255,-1!=b&&f(l,g)==b&&f(l,g+2)==m&&f(l,g+4)==p&&(s[U+3]=0)}else if(3==d){var w=e.tabs.PLTE,v=e.tabs.tRNS,k=v?v.length:0;if(1==u)for(var x=0;x<a;x++){var y=x*n,z=x*t;for(_=0;_<t;_++){var U=z+_<<2,j=3*(C=l[y+(_>>3)]>>7-((7&_)<<0)&1);s[U]=w[j],s[U+1]=w[j+1],s[U+2]=w[j+2],s[U+3]=C<k?v[C]:255}}if(2==u)for(x=0;x<a;x++)for(y=x*n,z=x*t,_=0;_<t;_++)U=z+_<<2,j=3*(C=l[y+(_>>2)]>>6-((3&_)<<1)&3),s[U]=w[j],s[U+1]=w[j+1],s[U+2]=w[j+2],s[U+3]=C<k?v[C]:255;if(4==u)for(x=0;x<a;x++)for(y=x*n,z=x*t,_=0;_<t;_++)U=z+_<<2,j=3*(C=l[y+(_>>1)]>>4-((1&_)<<2)&15),s[U]=w[j],s[U+1]=w[j+1],s[U+2]=w[j+2],s[U+3]=C<k?v[C]:255;if(8==u)for(_=0;_<i;_++){var C;U=_<<2,j=3*(C=l[_]),s[U]=w[j],s[U+1]=w[j+1],s[U+2]=w[j+2],s[U+3]=C<k?v[C]:255}}else if(4==d){if(8==u)for(_=0;_<i;_++){U=_<<2;var A=l[S=_<<1];s[U]=A,s[U+1]=A,s[U+2]=A,s[U+3]=l[S+1]}if(16==u)for(_=0;_<i;_++){var S;A=l[S=U=_<<2],s[U]=A,s[U+1]=A,s[U+2]=A,s[U+3]=l[S+2]}}else if(0==d){if(b=e.tabs.tRNS?e.tabs.tRNS:-1,1==u)for(_=0;_<i;_++){var B=(A=255*(l[_>>3]>>7-(7&_)&1))==255*b?0:255;o[_]=B<<24|A<<16|A<<8|A}if(2==u)for(_=0;_<i;_++)B=(A=85*(l[_>>2]>>6-((3&_)<<1)&3))==85*b?0:255,o[_]=B<<24|A<<16|A<<8|A;if(4==u)for(_=0;_<i;_++)B=(A=17*(l[_>>1]>>4-((1&_)<<2)&15))==17*b?0:255,o[_]=B<<24|A<<16|A<<8|A;if(8==u)for(_=0;_<i;_++)B=(A=l[_])==b?0:255,o[_]=B<<24|A<<16|A<<8|A;if(16==u)for(_=0;_<i;_++)A=l[_<<1],B=f(l,_<<1)==b?0:255,o[_]=B<<24|A<<16|A<<8|A}else console.log("unsupported color type",d);return s},M.encode=function(e,t,a,i){null==i&&(i=0);for(var r=new Uint8Array(e),n=new Uint8Array(r.length+100),s=[137,80,78,71,13,10,26,10],o=0;o<8;o++)n[o]=s[o];var l=8,d=M._bin,u=M.crc.crc,f=M.encode.compress(r,t,a,i);if(d.writeUint(n,l,13),l+=4,d.writeASCII(n,l,"IHDR"),l+=4,d.writeUint(n,l,t),l+=4,d.writeUint(n,l,a),n[l+=4]=f.depth,n[++l]=f.ctype,n[++l]=0,n[++l]=0,n[++l]=0,l++,d.writeUint(n,l,u(n,l-17,17)),l+=4,d.writeUint(n,l,1),l+=4,d.writeASCII(n,l,"sRGB"),n[l+=4]=1,l++,d.writeUint(n,l,u(n,l-5,5)),l+=4,3==f.ctype){var h=f.plte.length;for(d.writeUint(n,l,3*h),l+=4,d.writeASCII(n,l,"PLTE"),l+=4,o=0;o<h;o++){var _=3*o,c=f.plte[o],b=255&c,m=c>>8&255,p=c>>16&255;n[l+_+0]=b,n[l+_+1]=m,n[l+_+2]=p}if(l+=3*h,d.writeUint(n,l,u(n,l-3*h-4,3*h+4)),l+=4,f.gotAlpha){for(d.writeUint(n,l,h),l+=4,d.writeASCII(n,l,"tRNS"),l+=4,o=0;o<h;o++)n[l+o]=f.plte[o]>>24&255;l+=h,d.writeUint(n,l,u(n,l-h-4,h+4)),l+=4}}for(h=f.data.length,d.writeUint(n,l,h),l+=4,d.writeASCII(n,l,"IDAT"),l+=4,o=0;o<h;o++)n[l+o]=f.data[o];return l+=h,d.writeUint(n,l,u(n,l-h-4,h+4)),l+=4,d.writeUint(n,l,0),l+=4,d.writeASCII(n,l,"IEND"),l+=4,d.writeUint(n,l,u(n,l-4,4)),l+=4,n.buffer.slice(0,l)},M.encode.compress=function(e,t,a,i){0!=i&&(e=M.quantize(e,t,a,i));for(var r=6,n=8,s=[],o=4,l=4*t,d=new Uint32Array(e.buffer),u=!1,f=[],h=0;h<e.length;h+=4){var _=d[h>>2];s.length<600&&null==f[_]&&(f[_]=s.length,s.push(_)),255!=e[h+3]&&(u=!0)}var c=s.length;if(c<=256){n=c<=2?1:c<=4?2:c<=16?4:8,l=Math.ceil(n*t/8),g=new Uint8Array(l*a);for(var b=0;b<a;b++){h=b*l;var m=b*t;if(1==n)for(var p=0;p<t;p++)g[h+(p>>3)]|=f[d[m+p]]<<7-(7&p);if(2==n)for(p=0;p<t;p++)g[h+(p>>2)]|=f[d[m+p]]<<6-2*(3&p);if(4==n)for(p=0;p<t;p++)g[h+(p>>1)]|=f[d[m+p]]<<4-4*(1&p);if(8==n)for(p=0;p<t;p++)g[h+p]=f[d[m+p]]}e=g,r=3,o=1}else if(0==u){var g=new Uint8Array(t*a*3),w=t*a;for(h=0;h<w;h++){var v=3*h,k=4*h;g[v]=e[k],g[1+v]=e[1+k],g[2+v]=e[2+k]}e=g,r=2,l=(o=3)*t}var x=new Uint8Array(t*a*o+a);return{ctype:r,depth:n,plte:s,gotAlpha:u,data:M.encode._filterZero(e,a,o,l,x)}},M.encode._filterZero=function(e,t,a,i,r){for(var n=[],s=0;s<5;s++)if(!(5e5<t*i)||2!=s&&3!=s&&4!=s){for(var o=0;o<t;o++)M.encode._filterLine(r,e,o,i,a,s);if(n.push(f.deflate(r)),1==a)break}for(var l,d=1e9,u=0;u<n.length;u++)n[u].length<d&&(d=n[l=u].length);return n[l]},M.encode._filterLine=function(e,t,a,i,r,n){var s=a*i,o=s+a,l=M.decode._paeth;if(e[o]=n,o++,0==n)for(var d=0;d<i;d++)e[o+d]=t[s+d];else if(1==n){for(d=0;d<r;d++)e[o+d]=t[s+d];for(d=r;d<i;d++)e[o+d]=t[s+d]-t[s+d-r]+256&255}else if(0==a){for(d=0;d<r;d++)e[o+d]=t[s+d];if(2==n)for(d=r;d<i;d++)e[o+d]=t[s+d];if(3==n)for(d=r;d<i;d++)e[o+d]=t[s+d]-(t[s+d-r]>>1)+256&255;if(4==n)for(d=r;d<i;d++)e[o+d]=t[s+d]-l(t[s+d-r],0,0)+256&255}else{if(2==n)for(d=0;d<i;d++)e[o+d]=t[s+d]+256-t[s+d-i]&255;if(3==n){for(d=0;d<r;d++)e[o+d]=t[s+d]+256-(t[s+d-i]>>1)&255;for(d=r;d<i;d++)e[o+d]=t[s+d]+256-(t[s+d-i]+t[s+d-r]>>1)&255}if(4==n){for(d=0;d<r;d++)e[o+d]=t[s+d]+256-l(0,t[s+d-i],0)&255;for(d=r;d<i;d++)e[o+d]=t[s+d]+256-l(t[s+d-r],t[s+d-i],t[s+d-r-i])&255}}},M.crc={table:function(){for(var e=new Uint32Array(256),t=0;t<256;t++){for(var a=t,i=0;i<8;i++)1&a?a=3988292384^a>>>1:a>>>=1;e[t]=a}return e}(),update:function(e,t,a,i){for(var r=0;r<i;r++)e=M.crc.table[255&(e^t[a+r])]^e>>>8;return e},crc:function(e,t,a){return 4294967295^M.crc.update(4294967295,e,t,a)}},M.quantize=function(e,t,a,i){for(var r=new Uint8Array(e.length),n=new Uint16Array(t*a),s=t*a,o=M.quantize.dist,l=0;l<s;l++){var d=e[3+(x=l<<2)]/255;r[x+0]=e[x+0]*d,r[x+1]=e[x+1]*d,r[x+2]=e[x+2]*d,r[x+3]=e[x+3]}for(var u=[],f=[],h=0,_=Math.max(100,10*i);;){f=[],u=[];var c=255-((1<<h)-1),b=1<<h>>1;for(l=0;l<s;l++){var m=((B=r[x=l<<2])&c)+b,p=((I=r[x+1])&c)+b,g=((E=r[x+2])&c)+b,w=((d=r[x+3])&c)+b,v=w<<24|g<<16|p<<8|m;if(f[v]?u[f[v]].occ++:(f[v]=u.length,u.push({occ:1,r:m,g:p,b:g,a:w})),u.length>_)break}if(!(u.length>_))break;h++}if(0==h&&u.length<=i)return e;u.sort(function(e,t){return t.occ-e.occ}),i=Math.min(i,u.length);var k=new Uint8Array(4*i);for(l=0;l<i;l++){var x=l<<2,y=u[l];k[x]=y.r,k[x+1]=y.g,k[x+2]=y.b,k[x+3]=y.a}u=k;for(var z=Math.max(1,Math.min(10,Math.floor(1024/i))),U=0;U<z;U++){var j=new Uint32Array(i),C=new Uint32Array(4*i),A=new Uint32Array(i),S=new Uint32Array(i);for(l=0;l<i;l++){var B=u[x=l<<2],I=u[x+1],E=u[x+2],P=(d=u[x+3],0);R=1e9;for(var Z=0;Z<i;Z++)Z!=l&&(N=o(B,I,E,d,u,Z<<2))<R&&(P=Z,R=N);A[l]=R,S[l]=P}for(l=0;l<s;l++){P=0;var R=1e9;if(!((R=o(B=r[x=l<<2],I=r[x+1],E=r[x+2],d=r[x+3],u,(P=n[l])<<2))<=A[P]>>1))for(Z=0;Z<i;Z++)if((N=o(B,I,E,d,u,Z<<2))<R){if((R=N)<=A[P=Z]>>1)break;var N;if((N=o(B,I,E,d,u,S[Z]<<2))<=A[P]>>1){P=S[Z];break}}j[n[l]=P]++,C[T=P<<2]+=B,C[T+1]+=I,C[T+2]+=E,C[T+3]+=d}for(l=0;l<i;l++){x=l<<2;var D=1/j[l];u[x]=C[x]*D,u[x+1]=C[x+1]*D,u[x+2]=C[x+2]*D,u[x+3]=C[x+3]*D}}for(l=0;l<s;l++){x=l<<2;var T,O=0==u[3+(T=(P=n[l])<<2)]?0:255/u[T+3];r[x+0]=u[T+0]*O,r[x+1]=u[T+1]*O,r[x+2]=u[T+2]*O,r[x+3]=u[T+3]}return r},M.quantize.dist=function(e,t,a,i,r,n){var s=r[n],o=r[n+1],l=r[n+2],d=r[n+3];return(s-e)*(s-e)+(o-t)*(o-t)+(l-a)*(l-a)+(d-i)*(d-i)},M.quantize.dither=function(e,t,a,i,r,n){for(var s=new Float32Array(t*a*4),o=1/16,l=M.quantize.dist,d=Math.round,u=t<<2,f=0;f<a;f++)for(var h=0;h<t;h++){for(var _=f*t+h,c=_<<2,b=0;b<4;b++)s[c+b]=Math.max(-8,Math.min(8,s[c+b]));var m=d(e[c]+s[c]),p=d(e[1+c]+s[1+c]),g=d(e[2+c]+s[2+c]),w=d(e[3+c]+s[3+c]),v=0,k=1e9;for(b=0;b<n;b++){var x=l(m,p,g,w,r,b<<2);x<k&&(v=b,k=x)}var y=(i[_]=v)<<2,z=m-r[y],U=p-r[1+y],j=g-r[2+y],C=w-r[3+y];s[4+c]+=7*z*o,s[4+c+1]+=7*U*o,s[4+c+2]+=7*j*o,s[4+c+3]+=7*C*o,s[c+u-4]+=3*z*o,s[c+u-4+1]+=3*U*o,s[c+u-4+2]+=3*j*o,s[c+u-4+3]+=3*C*o,s[c+u]+=5*z*o,s[c+u+1]+=5*U*o,s[c+u+2]+=5*j*o,s[c+u+3]+=5*C*o,s[c+u+4]+=z*o,s[c+u+4+1]+=U*o,s[c+u+4+2]+=j*o,s[c+u+4+3]+=C*o}},M.decode=function(e){for(var t=new Uint8Array(e),a=8,i=M._bin,r=i.readUshort,n={tabs:{}},s=new Uint8Array(t.length),o=0;;){var l=i.readUint(t,a);a+=4;var d=i.readASCII(t,a,4);if(a+=4,"IHDR"==d)M.decode._IHDR(t,a,n);else if("IDAT"==d){for(var u=0;u<l;u++)s[o+u]=t[a+u];o+=l}else if("pHYs"==d)n.tabs[d]=[i.readUint(t,a),i.readUint(t,a+4),t[a+8]];else if("cHRM"==d)for(n.tabs[d]=[],u=0;u<8;u++)n.tabs[d].push(i.readUint(t,a+4*u));else if("tEXt"==d){null==n.tabs[d]&&(n.tabs[d]={});var f=i.nextZero(t,a),h=i.readASCII(t,a,f-a),_=i.readASCII(t,f+1,a+l-f-1);n.tabs[d][h]=_}else if("iTXt"==d){null==n.tabs[d]&&(n.tabs[d]={}),f=0;var c=a;f=i.nextZero(t,c),h=i.readASCII(t,c,f-c),t[c=f+1],t[c+1],c+=2,f=i.nextZero(t,c),i.readASCII(t,c,f-c),c=f+1,f=i.nextZero(t,c),i.readUTF8(t,c,f-c),c=f+1,_=i.readUTF8(t,c,l-(c-a)),n.tabs[d][h]=_}else if("PLTE"==d)n.tabs[d]=i.readBytes(t,a,l);else if("hIST"==d){var b=n.tabs.PLTE.length/3;for(n.tabs[d]=[],u=0;u<b;u++)n.tabs[d].push(r(t,a+2*u))}else if("tRNS"==d)3==n.ctype?n.tabs[d]=i.readBytes(t,a,l):0==n.ctype?n.tabs[d]=r(t,a):2==n.ctype?n.tabs[d]=[r(t,a),r(t,a+2),r(t,a+4)]:console.log("tRNS for unsupported color type",n.ctype,l);else if("gAMA"==d)n.tabs[d]=i.readUint(t,a)/1e5;else if("sRGB"==d)n.tabs[d]=t[a];else if("bKGD"==d)0==n.ctype||4==n.ctype?n.tabs[d]=[r(t,a)]:2==n.ctype||6==n.ctype?n.tabs[d]=[r(t,a),r(t,a+2),r(t,a+4)]:3==n.ctype&&(n.tabs[d]=t[a]);else{if("IEND"==d){0==n.compress?s=M.decode._inflate(s):console.log("unsupported compression method:",n.interlace),0!=n.filter&&console.log("unsupported filter method:",n.filter),0==n.interlace?n.data=M.decode._filterZero(s,n,0,n.width,n.height):1==n.interlace?n.data=M.decode._readInterlace(s,n):console.log("unsupported interlace method:",n.interlace);break}console.log("unknown chunk type",d,l)}a+=l,i.readUint(t,a),a+=4}return delete n.compress,delete n.interlace,delete n.filter,n},M.decode._inflate=function(e){return f.inflate(e)},M.decode._readInterlace=function(e,t){for(var a=t.width,i=t.height,r=M.decode._getBPP(t),n=r>>3,s=Math.ceil(a*r/8),o=new Uint8Array(i*s),l=0,d=[0,0,4,0,2,0,1],u=[0,4,0,2,0,1,0],f=[8,8,8,4,4,2,2],h=[8,8,4,4,2,2,1],_=0;_<7;){for(var c=f[_],b=h[_],m=0,p=0,g=d[_];g<i;)g+=c,p++;for(var w=u[_];w<a;)w+=b,m++;var v=Math.ceil(m*r/8);M.decode._filterZero(e,t,l,m,p);for(var k=0,x=d[_];x<i;){for(var y=u[_],z=l+k*v<<3;y<a;){var U;if(1==r&&(U=(U=e[z>>3])>>7-(7&z)&1,o[x*s+(y>>3)]|=U<<7-((3&y)<<0)),2==r&&(U=(U=e[z>>3])>>6-(7&z)&3,o[x*s+(y>>2)]|=U<<6-((3&y)<<1)),4==r&&(U=(U=e[z>>3])>>4-(7&z)&15,o[x*s+(y>>1)]|=U<<4-((1&y)<<2)),8<=r)for(var j=x*s+y*n,C=0;C<n;C++)o[j+C]=e[(z>>3)+C];z+=r,y+=b}k++,x+=c}m*p!=0&&(l+=p*(1+v)),_+=1}return o},M.decode._getBPP=function(e){var t=[1,null,3,1,2,null,4][e.ctype];return null==t&&console.log("unsupported color type",e.ctype),t*e.depth},M.decode._filterZero=function(e,t,a,i,r){var n=M.decode._getBPP(t),s=Math.ceil(i*n/8),o=M.decode._paeth;n=Math.ceil(n/8);for(var l=0;l<r;l++){var d=a+l*s,u=d+l+1,f=e[u-1];if(0==f)for(var h=0;h<s;h++)e[d+h]=e[u+h];else if(1==f){for(h=0;h<n;h++)e[d+h]=e[u+h];for(h=n;h<s;h++)e[d+h]=e[u+h]+e[d+h-n]&255}else if(0==l){for(h=0;h<n;h++)e[d+h]=e[u+h];if(2==f)for(h=n;h<s;h++)e[d+h]=255&e[u+h];if(3==f)for(h=n;h<s;h++)e[d+h]=e[u+h]+(e[d+h-n]>>1)&255;if(4==f)for(h=n;h<s;h++)e[d+h]=e[u+h]+o(e[d+h-n],0,0)&255}else{if(2==f)for(h=0;h<s;h++)e[d+h]=e[u+h]+e[d+h-s]&255;if(3==f){for(h=0;h<n;h++)e[d+h]=e[u+h]+(e[d+h-s]>>1)&255;for(h=n;h<s;h++)e[d+h]=e[u+h]+(e[d+h-s]+e[d+h-n]>>1)&255}if(4==f){for(h=0;h<n;h++)e[d+h]=e[u+h]+o(0,e[d+h-s],0)&255;for(h=n;h<s;h++)e[d+h]=e[u+h]+o(e[d+h-n],e[d+h-s],e[d+h-n-s])&255}}}return e},M.decode._paeth=function(e,t,a){var i=e+t-a,r=Math.abs(i-e),n=Math.abs(i-t),s=Math.abs(i-a);return r<=n&&r<=s?e:n<=s?t:a},M.decode._IHDR=function(e,t,a){var i=M._bin;a.width=i.readUint(e,t),t+=4,a.height=i.readUint(e,t),t+=4,a.depth=e[t],t++,a.ctype=e[t],t++,a.compress=e[t],t++,a.filter=e[t],t++,a.interlace=e[t],t++},M._bin={nextZero:function(e,t){for(;0!=e[t];)t++;return t},readUshort:function(e,t){return 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i.last_flush=-1,b}return t!==f?b:i.wrap<=0?1:(2===i.wrap?(D(i,255&e.adler),D(i,e.adler>>8&255),D(i,e.adler>>16&255),D(i,e.adler>>24&255),D(i,255&e.total_in),D(i,e.total_in>>8&255),D(i,e.total_in>>16&255),D(i,e.total_in>>24&255)):(T(i,e.adler>>>16),T(i,65535&e.adler)),R(e),0<i.wrap&&(i.wrap=-i.wrap),0!==i.pending?b:1)},a.deflateEnd=function(e){var t;return e&&e.state?(t=e.state.status)!==j&&69!==t&&73!==t&&91!==t&&103!==t&&t!==C&&666!==t?E(e,m):(e.state=null,t===C?E(e,-3):b):m},a.deflateSetDictionary=function(e,t){var a,i,r,n,s,o,l,d,u=t.length;if(!e||!e.state)return m;if(2===(n=(a=e.state).wrap)||1===n&&a.status!==j||a.lookahead)return m;for(1===n&&(e.adler=_(e.adler,t,u,0)),a.wrap=0,u>=a.w_size&&(0===n&&(Z(a.head),a.strstart=0,a.block_start=0,a.insert=0),d=new 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