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MES-App/node_modules/utif/UTIF.js

945 строки
50 KiB
Исходник Вина История 

  1. 

  2. 

  3. 

  4. 

  5. ;(function(){

  6. var UTIF = {};

  7. 

  8. // Make available for import by `require()`

  9. if (typeof module == "object") {module.exports = UTIF;}

  10. else {self.UTIF = UTIF;}

  11. 

  12. var pako;

  13. if (typeof require == "function") {pako = require("pako");}

  14. else {pako = self.pako;}

  15. 

  16. function log() { if (typeof process=="undefined" || process.env.NODE_ENV=="development") console.log.apply(console, arguments);  }

  17. 

  18. (function(UTIF, pako){

  19. 	

  20. // Following lines add a JPEG decoder  to UTIF.JpegDecoder

  21. (function(){var V="function"===typeof Symbol&&"symbol"===typeof Symbol.iterator?function(g){return typeof g}:function(g){return g&&"function"===typeof Symbol&&g.constructor===Symbol&&g!==Symbol.prototype?"symbol":typeof g},D=function(){function g(g){this.message="JPEG error: "+g}g.prototype=Error();g.prototype.name="JpegError";return g.constructor=g}(),P=function(){function g(g,D){this.message=g;this.g=D}g.prototype=Error();g.prototype.name="DNLMarkerError";return g.constructor=g}();(function(){function g(){this.M=

  22. null;this.B=-1}function W(a,d){for(var f=0,e=[],b,B,k=16;0<k&&!a[k-1];)k--;e.push({children:[],index:0});var l=e[0],r;for(b=0;b<k;b++){for(B=0;B<a[b];B++){l=e.pop();for(l.children[l.index]=d[f];0<l.index;)l=e.pop();l.index++;for(e.push(l);e.length<=b;)e.push(r={children:[],index:0}),l.children[l.index]=r.children,l=r;f++}b+1<k&&(e.push(r={children:[],index:0}),l.children[l.index]=r.children,l=r)}return e[0].children}function X(a,d,f,e,b,B,k,l,r){function n(){if(0<x)return x--,z>>x&1;z=a[d++];if(255===

  23. z){var c=a[d++];if(c){if(220===c&&g){d+=2;var b=a[d++]<<8|a[d++];if(0<b&&b!==f.g)throw new P("Found DNL marker (0xFFDC) while parsing scan data",b);}throw new D("unexpected marker "+(z<<8|c).toString(16));}}x=7;return z>>>7}function q(a){for(;;){a=a[n()];if("number"===typeof a)return a;if("object"!==("undefined"===typeof a?"undefined":V(a)))throw new D("invalid huffman sequence");}}function h(a){for(var c=0;0<a;)c=c<<1|n(),a--;return c}function c(a){if(1===a)return 1===n()?1:-1;var c=h(a);return c>=

  24. 1<<a-1?c:c+(-1<<a)+1}function C(a,b){var d=q(a.D);d=0===d?0:c(d);a.a[b]=a.m+=d;for(d=1;64>d;){var h=q(a.o),k=h&15;h>>=4;if(0===k){if(15>h)break;d+=16}else d+=h,a.a[b+J[d]]=c(k),d++}}function w(a,d){var b=q(a.D);b=0===b?0:c(b)<<r;a.a[d]=a.m+=b}function p(a,c){a.a[c]|=n()<<r}function m(a,b){if(0<A)A--;else for(var d=B;d<=k;){var e=q(a.o),f=e&15;e>>=4;if(0===f){if(15>e){A=h(e)+(1<<e)-1;break}d+=16}else d+=e,a.a[b+J[d]]=c(f)*(1<<r),d++}}function t(a,d){for(var b=B,e=0,f;b<=k;){f=d+J[b];var l=0>a.a[f]?

  25. -1:1;switch(E){case 0:e=q(a.o);f=e&15;e>>=4;if(0===f)15>e?(A=h(e)+(1<<e),E=4):(e=16,E=1);else{if(1!==f)throw new D("invalid ACn encoding");Q=c(f);E=e?2:3}continue;case 1:case 2:a.a[f]?a.a[f]+=l*(n()<<r):(e--,0===e&&(E=2===E?3:0));break;case 3:a.a[f]?a.a[f]+=l*(n()<<r):(a.a[f]=Q<<r,E=0);break;case 4:a.a[f]&&(a.a[f]+=l*(n()<<r))}b++}4===E&&(A--,0===A&&(E=0))}var g=9<arguments.length&&void 0!==arguments[9]?arguments[9]:!1,u=f.P,v=d,z=0,x=0,A=0,E=0,Q,K=e.length,F,L,M,I;var R=f.S?0===B?0===l?w:p:0===l?

  26. m:t:C;var G=0;var O=1===K?e[0].c*e[0].l:u*f.O;for(var S,T;G<O;){var U=b?Math.min(O-G,b):O;for(F=0;F<K;F++)e[F].m=0;A=0;if(1===K){var y=e[0];for(I=0;I<U;I++)R(y,64*((y.c+1)*(G/y.c|0)+G%y.c)),G++}else for(I=0;I<U;I++){for(F=0;F<K;F++)for(y=e[F],S=y.h,T=y.j,L=0;L<T;L++)for(M=0;M<S;M++)R(y,64*((y.c+1)*((G/u|0)*y.j+L)+(G%u*y.h+M)));G++}x=0;(y=N(a,d))&&y.f&&((0,_util.warn)("decodeScan - unexpected MCU data, current marker is: "+y.f),d=y.offset);y=y&&y.F;if(!y||65280>=y)throw new D("marker was not found");

  27. if(65488<=y&&65495>=y)d+=2;else break}(y=N(a,d))&&y.f&&((0,_util.warn)("decodeScan - unexpected Scan data, current marker is: "+y.f),d=y.offset);return d-v}function Y(a,d){for(var f=d.c,e=d.l,b=new Int16Array(64),B=0;B<e;B++)for(var k=0;k<f;k++){var l=64*((d.c+1)*B+k),r=b,n=d.G,q=d.a;if(!n)throw new D("missing required Quantization Table.");for(var h=0;64>h;h+=8){var c=q[l+h];var C=q[l+h+1];var w=q[l+h+2];var p=q[l+h+3];var m=q[l+h+4];var t=q[l+h+5];var g=q[l+h+6];var u=q[l+h+7];c*=n[h];if(0===(C|

  28. w|p|m|t|g|u))c=5793*c+512>>10,r[h]=c,r[h+1]=c,r[h+2]=c,r[h+3]=c,r[h+4]=c,r[h+5]=c,r[h+6]=c,r[h+7]=c;else{C*=n[h+1];w*=n[h+2];p*=n[h+3];m*=n[h+4];t*=n[h+5];g*=n[h+6];u*=n[h+7];var v=5793*c+128>>8;var z=5793*m+128>>8;var x=w;var A=g;m=2896*(C-u)+128>>8;u=2896*(C+u)+128>>8;p<<=4;t<<=4;v=v+z+1>>1;z=v-z;c=3784*x+1567*A+128>>8;x=1567*x-3784*A+128>>8;A=c;m=m+t+1>>1;t=m-t;u=u+p+1>>1;p=u-p;v=v+A+1>>1;A=v-A;z=z+x+1>>1;x=z-x;c=2276*m+3406*u+2048>>12;m=3406*m-2276*u+2048>>12;u=c;c=799*p+4017*t+2048>>12;p=4017*

  29. p-799*t+2048>>12;t=c;r[h]=v+u;r[h+7]=v-u;r[h+1]=z+t;r[h+6]=z-t;r[h+2]=x+p;r[h+5]=x-p;r[h+3]=A+m;r[h+4]=A-m}}for(n=0;8>n;++n)c=r[n],C=r[n+8],w=r[n+16],p=r[n+24],m=r[n+32],t=r[n+40],g=r[n+48],u=r[n+56],0===(C|w|p|m|t|g|u)?(c=5793*c+8192>>14,c=-2040>c?0:2024<=c?255:c+2056>>4,q[l+n]=c,q[l+n+8]=c,q[l+n+16]=c,q[l+n+24]=c,q[l+n+32]=c,q[l+n+40]=c,q[l+n+48]=c,q[l+n+56]=c):(v=5793*c+2048>>12,z=5793*m+2048>>12,x=w,A=g,m=2896*(C-u)+2048>>12,u=2896*(C+u)+2048>>12,v=(v+z+1>>1)+4112,z=v-z,c=3784*x+1567*A+2048>>

  30. 12,x=1567*x-3784*A+2048>>12,A=c,m=m+t+1>>1,t=m-t,u=u+p+1>>1,p=u-p,v=v+A+1>>1,A=v-A,z=z+x+1>>1,x=z-x,c=2276*m+3406*u+2048>>12,m=3406*m-2276*u+2048>>12,u=c,c=799*p+4017*t+2048>>12,p=4017*p-799*t+2048>>12,t=c,c=v+u,u=v-u,C=z+t,g=z-t,w=x+p,t=x-p,p=A+m,m=A-m,c=16>c?0:4080<=c?255:c>>4,C=16>C?0:4080<=C?255:C>>4,w=16>w?0:4080<=w?255:w>>4,p=16>p?0:4080<=p?255:p>>4,m=16>m?0:4080<=m?255:m>>4,t=16>t?0:4080<=t?255:t>>4,g=16>g?0:4080<=g?255:g>>4,u=16>u?0:4080<=u?255:u>>4,q[l+n]=c,q[l+n+8]=C,q[l+n+16]=w,q[l+n+24]=

  31. p,q[l+n+32]=m,q[l+n+40]=t,q[l+n+48]=g,q[l+n+56]=u)}return d.a}function N(a,d){var f=2<arguments.length&&void 0!==arguments[2]?arguments[2]:d,e=a.length-1;f=f<d?f:d;if(d>=e)return null;var b=a[d]<<8|a[d+1];if(65472<=b&&65534>=b)return{f:null,F:b,offset:d};for(var B=a[f]<<8|a[f+1];!(65472<=B&&65534>=B);){if(++f>=e)return null;B=a[f]<<8|a[f+1]}return{f:b.toString(16),F:B,offset:f}}var J=new Uint8Array([0,1,8,16,9,2,3,10,17,24,32,25,18,11,4,5,12,19,26,33,40,48,41,34,27,20,13,6,7,14,21,28,35,42,49,56,

  32. 57,50,43,36,29,22,15,23,30,37,44,51,58,59,52,45,38,31,39,46,53,60,61,54,47,55,62,63]);g.prototype={parse:function(a){function d(){var d=a[k]<<8|a[k+1];k+=2;return d}function f(){var b=d();b=k+b-2;var c=N(a,b,k);c&&c.f&&((0,_util.warn)("readDataBlock - incorrect length, current marker is: "+c.f),b=c.offset);b=a.subarray(k,b);k+=b.length;return b}function e(a){for(var b=Math.ceil(a.v/8/a.s),c=Math.ceil(a.g/8/a.u),d=0;d<a.b.length;d++){v=a.b[d];var e=Math.ceil(Math.ceil(a.v/8)*v.h/a.s),f=Math.ceil(Math.ceil(a.g/

  33. 8)*v.j/a.u);v.a=new Int16Array(64*c*v.j*(b*v.h+1));v.c=e;v.l=f}a.P=b;a.O=c}var b=(1<arguments.length&&void 0!==arguments[1]?arguments[1]:{}).N,B=void 0===b?null:b,k=0,l=null,r=0;b=[];var n=[],q=[],h=d();if(65496!==h)throw new D("SOI not found");for(h=d();65497!==h;){switch(h){case 65504:case 65505:case 65506:case 65507:case 65508:case 65509:case 65510:case 65511:case 65512:case 65513:case 65514:case 65515:case 65516:case 65517:case 65518:case 65519:case 65534:var c=f();65518===h&&65===c[0]&&100===

  34. c[1]&&111===c[2]&&98===c[3]&&101===c[4]&&(l={version:c[5]<<8|c[6],Y:c[7]<<8|c[8],Z:c[9]<<8|c[10],W:c[11]});break;case 65499:h=d()+k-2;for(var g;k<h;){var w=a[k++],p=new Uint16Array(64);if(0===w>>4)for(c=0;64>c;c++)g=J[c],p[g]=a[k++];else if(1===w>>4)for(c=0;64>c;c++)g=J[c],p[g]=d();else throw new D("DQT - invalid table spec");b[w&15]=p}break;case 65472:case 65473:case 65474:if(m)throw new D("Only single frame JPEGs supported");d();var m={};m.X=65473===h;m.S=65474===h;m.precision=a[k++];h=d();m.g=

  35. B||h;m.v=d();m.b=[];m.C={};c=a[k++];for(h=p=w=0;h<c;h++){g=a[k];var t=a[k+1]>>4;var H=a[k+1]&15;w<t&&(w=t);p<H&&(p=H);t=m.b.push({h:t,j:H,T:a[k+2],G:null});m.C[g]=t-1;k+=3}m.s=w;m.u=p;e(m);break;case 65476:g=d();for(h=2;h<g;){w=a[k++];p=new Uint8Array(16);for(c=t=0;16>c;c++,k++)t+=p[c]=a[k];H=new Uint8Array(t);for(c=0;c<t;c++,k++)H[c]=a[k];h+=17+t;(0===w>>4?q:n)[w&15]=W(p,H)}break;case 65501:d();var u=d();break;case 65498:c=1===++r&&!B;d();w=a[k++];g=[];for(h=0;h<w;h++){p=m.C[a[k++]];var v=m.b[p];

  36. p=a[k++];v.D=q[p>>4];v.o=n[p&15];g.push(v)}h=a[k++];w=a[k++];p=a[k++];try{var z=X(a,k,m,g,u,h,w,p>>4,p&15,c);k+=z}catch(x){if(x instanceof P)return(0,_util.warn)('Attempting to re-parse JPEG image using "scanLines" parameter found in DNL marker (0xFFDC) segment.'),this.parse(a,{N:x.g});throw x;}break;case 65500:k+=4;break;case 65535:255!==a[k]&&k--;break;default:if(255===a[k-3]&&192<=a[k-2]&&254>=a[k-2])k-=3;else if((c=N(a,k-2))&&c.f)(0,_util.warn)("JpegImage.parse - unexpected data, current marker is: "+

  37. c.f),k=c.offset;else throw new D("unknown marker "+h.toString(16));}h=d()}this.width=m.v;this.height=m.g;this.A=l;this.b=[];for(h=0;h<m.b.length;h++){v=m.b[h];if(u=b[v.T])v.G=u;this.b.push({R:Y(m,v),U:v.h/m.s,V:v.j/m.u,c:v.c,l:v.l})}this.i=this.b.length},L:function(a,d){var f=this.width/a,e=this.height/d,b,g,k=this.b.length,l=a*d*k,r=new Uint8ClampedArray(l),n=new Uint32Array(a);for(g=0;g<k;g++){var q=this.b[g];var h=q.U*f;var c=q.V*e;var C=g;var w=q.R;var p=q.c+1<<3;for(b=0;b<a;b++)q=0|b*h,n[b]=

  38. (q&4294967288)<<3|q&7;for(h=0;h<d;h++)for(q=0|h*c,q=p*(q&4294967288)|(q&7)<<3,b=0;b<a;b++)r[C]=w[q+n[b]],C+=k}if(e=this.M)for(g=0;g<l;)for(f=q=0;q<k;q++,g++,f+=2)r[g]=(r[g]*e[f]>>8)+e[f+1];return r},w:function(){return this.A?!!this.A.W:3===this.i?0===this.B?!1:!0:1===this.B?!0:!1},I:function(a){for(var d,f,e,b=0,g=a.length;b<g;b+=3)d=a[b],f=a[b+1],e=a[b+2],a[b]=d-179.456+1.402*e,a[b+1]=d+135.459-.344*f-.714*e,a[b+2]=d-226.816+1.772*f;return a},K:function(a){for(var d,f,e,b,g=0,k=0,l=a.length;k<l;k+=

  39. 4)d=a[k],f=a[k+1],e=a[k+2],b=a[k+3],a[g++]=-122.67195406894+f*(-6.60635669420364E-5*f+4.37130475926232E-4*e-5.4080610064599E-5*d+4.8449797120281E-4*b-.154362151871126)+e*(-9.57964378445773E-4*e+8.17076911346625E-4*d-.00477271405408747*b+1.53380253221734)+d*(9.61250184130688E-4*d-.00266257332283933*b+.48357088451265)+b*(-3.36197177618394E-4*b+.484791561490776),a[g++]=107.268039397724+f*(2.19927104525741E-5*f-6.40992018297945E-4*e+6.59397001245577E-4*d+4.26105652938837E-4*b-.176491792462875)+e*(-7.78269941513683E-4*

  40. e+.00130872261408275*d+7.70482631801132E-4*b-.151051492775562)+d*(.00126935368114843*d-.00265090189010898*b+.25802910206845)+b*(-3.18913117588328E-4*b-.213742400323665),a[g++]=-20.810012546947+f*(-5.70115196973677E-4*f-2.63409051004589E-5*e+.0020741088115012*d-.00288260236853442*b+.814272968359295)+e*(-1.53496057440975E-5*e-1.32689043961446E-4*d+5.60833691242812E-4*b-.195152027534049)+d*(.00174418132927582*d-.00255243321439347*b+.116935020465145)+b*(-3.43531996510555E-4*b+.24165260232407);return a.subarray(0,

  41. g)},J:function(a){for(var d,f,e,b=0,g=a.length;b<g;b+=4)d=a[b],f=a[b+1],e=a[b+2],a[b]=434.456-d-1.402*e,a[b+1]=119.541-d+.344*f+.714*e,a[b+2]=481.816-d-1.772*f;return a},H:function(a){for(var d,f,e,b,g=0,k=1/255,l=0,r=a.length;l<r;l+=4)d=a[l]*k,f=a[l+1]*k,e=a[l+2]*k,b=a[l+3]*k,a[g++]=255+d*(-4.387332384609988*d+54.48615194189176*f+18.82290502165302*e+212.25662451639585*b-285.2331026137004)+f*(1.7149763477362134*f-5.6096736904047315*e-17.873870861415444*b-5.497006427196366)+e*(-2.5217340131683033*

  42. e-21.248923337353073*b+17.5119270841813)-b*(21.86122147463605*b+189.48180835922747),a[g++]=255+d*(8.841041422036149*d+60.118027045597366*f+6.871425592049007*e+31.159100130055922*b-79.2970844816548)+f*(-15.310361306967817*f+17.575251261109482*e+131.35250912493976*b-190.9453302588951)+e*(4.444339102852739*e+9.8632861493405*b-24.86741582555878)-b*(20.737325471181034*b+187.80453709719578),a[g++]=255+d*(.8842522430003296*d+8.078677503112928*f+30.89978309703729*e-.23883238689178934*b-14.183576799673286)+

  43. f*(10.49593273432072*f+63.02378494754052*e+50.606957656360734*b-112.23884253719248)+e*(.03296041114873217*e+115.60384449646641*b-193.58209356861505)-b*(22.33816807309886*b+180.12613974708367);return a.subarray(0,g)},getData:function(a,d,f){if(4<this.i)throw new D("Unsupported color mode");a=this.L(a,d);if(1===this.i&&f){f=a.length;d=new Uint8ClampedArray(3*f);for(var e=0,b=0;b<f;b++){var g=a[b];d[e++]=g;d[e++]=g;d[e++]=g}return d}if(3===this.i&&this.w())return this.I(a);if(4===this.i){if(this.w())return f?

  44. this.K(a):this.J(a);if(f)return this.H(a)}return a}}; UTIF.JpegDecoder=g})()})();

  45. 

  46. //UTIF.JpegDecoder = window.JpegDecoder;

  47. 

  48. UTIF.encodeImage = function(rgba, w, h, metadata)

  49. {

  50. 	var idf = { "t256":[w], "t257":[h], "t258":[8,8,8,8], "t259":[1], "t262":[2], "t273":[1000], // strips offset

  51. 				"t277":[4], "t278":[h], /* rows per strip */          "t279":[w*h*4], // strip byte counts

  52. 				"t282":[1], "t283":[1], "t284":[1], "t286":[0], "t287":[0], "t296":[1], "t305": ["Photopea (UTIF.js)"], "t338":[1]

  53. 		};

  54. 	if (metadata) for (var i in metadata) idf[i] = metadata[i];

  55. 	

  56. 	var prfx = new Uint8Array(UTIF.encode([idf]));

  57. 	var img = new Uint8Array(rgba);

  58. 	var data = new Uint8Array(1000+w*h*4);

  59. 	for(var i=0; i<prfx.length; i++) data[i] = prfx[i];

  60. 	for(var i=0; i<img .length; i++) data[1000+i] = img[i];

  61. 	return data.buffer;

  62. }

  63. 

  64. UTIF.encode = function(ifds)

  65. {

  66. 	var data = new Uint8Array(20000), offset = 4, bin = UTIF._binBE;

  67. 	data[0]=77;  data[1]=77;  data[3]=42;

  68. 

  69. 	var ifdo = 8;

  70. 	bin.writeUint(data, offset, ifdo);  offset+=4;

  71. 	for(var i=0; i<ifds.length; i++)

  72. 	{

  73. 		var noffs = UTIF._writeIFD(bin, data, ifdo, ifds[i]);

  74. 		ifdo = noffs[1];

  75. 		if(i<ifds.length-1) bin.writeUint(data, noffs[0], ifdo);

  76. 	}

  77. 	return data.slice(0, ifdo).buffer;

  78. }

  79. //UTIF.encode._writeIFD

  80. 

  81. UTIF.decode = function(buff)

  82. {

  83. 	UTIF.decode._decodeG3.allow2D = null;

  84. 	var data = new Uint8Array(buff), offset = 0;

  85. 

  86. 	var id = UTIF._binBE.readASCII(data, offset, 2);  offset+=2;

  87. 	var bin = id=="II" ? UTIF._binLE : UTIF._binBE;

  88. 	var num = bin.readUshort(data, offset);  offset+=2;

  89. 

  90. 	var ifdo = bin.readUint(data, offset);  offset+=4;

  91. 	var ifds = [];

  92. 	while(true)

  93. 	{

  94. 		var noff = UTIF._readIFD(bin, data, ifdo, ifds);

  95. 		//var ifd = ifds[ifds.length-1];   if(ifd["t34665"]) {  ifd.exifIFD = [];  UTIF._readIFD(bin, data, ifd["t34665"][0], ifd.exifIFD);  }

  96. 		ifdo = bin.readUint(data, noff);

  97. 		if(ifdo==0) break;

  98. 	}

  99. 	return ifds;

  100. }

  101. 

  102. UTIF.decodeImages = function(buff, ifds)

  103. {

  104. 	var data = new Uint8Array(buff);

  105. 	var id = UTIF._binBE.readASCII(data, 0, 2);

  106. 

  107. 	for(var ii=0; ii<ifds.length; ii++)

  108. 	{

  109. 		var img = ifds[ii];

  110. 		if(img["t256"]==null) continue;	// EXIF files don't have TIFF tags

  111. 		img.isLE = id=="II";

  112. 		img.width  = img["t256"][0];  //delete img["t256"];

  113. 		img.height = img["t257"][0];  //delete img["t257"];

  114. 

  115. 		var cmpr   = img["t259"] ? img["t259"][0] : 1;  //delete img["t259"];

  116. 		var fo = img["t266"] ? img["t266"][0] : 1;  //delete img["t266"];

  117. 		if(img["t284"] && img["t284"][0]==2) log("PlanarConfiguration 2 should not be used!");

  118. 

  119. 		var bipp = (img["t258"]?Math.min(32,img["t258"][0]):1) * (img["t277"]?img["t277"][0]:1);  // bits per pixel

  120. 		var bipl = Math.ceil(img.width*bipp/8)*8;

  121. 		var soff = img["t273"];  if(soff==null) soff = img["t324"];

  122. 		var bcnt = img["t279"];  if(cmpr==1 && soff.length==1) bcnt = [img.height*(bipl>>>3)];  if(bcnt==null) bcnt = img["t325"];

  123. 		var bytes = new Uint8Array(img.height*(bipl>>>3)), bilen = 0;

  124. 

  125. 		if(img["t322"]!=null) // tiled

  126. 		{

  127. 			var tw = img["t322"][0], th = img["t323"][0];

  128. 			var tx = Math.floor((img.width  + tw - 1) / tw);

  129. 			var ty = Math.floor((img.height + th - 1) / th);

  130. 			var tbuff = new Uint8Array(Math.ceil(tw*th*bipp/8)|0);

  131. 			for(var y=0; y<ty; y++)

  132. 				for(var x=0; x<tx; x++)

  133. 				{

  134. 					var i = y*tx+x;  for(var j=0; j<tbuff.length; j++) tbuff[j]=0;

  135. 					UTIF.decode._decompress(img, data, soff[i], bcnt[i], cmpr, tbuff, 0, fo);

  136. 					// Might be required for 7 too. Need to check

  137. 					if (cmpr==6) bytes = tbuff;

  138. 					else UTIF._copyTile(tbuff, Math.ceil(tw*bipp/8)|0, th, bytes, Math.ceil(img.width*bipp/8)|0, img.height, Math.ceil(x*tw*bipp/8)|0, y*th);

  139. 				}

  140. 			bilen = bytes.length*8;

  141. 		}

  142. 		else	// stripped

  143. 		{

  144. 			var rps = img["t278"] ? img["t278"][0] : img.height;   rps = Math.min(rps, img.height);

  145. 			for(var i=0; i<soff.length; i++)

  146. 			{

  147. 				UTIF.decode._decompress(img, data, soff[i], bcnt[i], cmpr, bytes, Math.ceil(bilen/8)|0, fo);

  148. 				bilen += bipl * rps;

  149. 			}

  150. 			bilen = Math.min(bilen, bytes.length*8);

  151. 		}

  152. 		img.data = new Uint8Array(bytes.buffer, 0, Math.ceil(bilen/8)|0);

  153. 	}

  154. }

  155. 

  156. UTIF.decode._decompress = function(img, data, off, len, cmpr, tgt, toff, fo)  // fill order

  157. {

  158. 	//console.log("compression", cmpr);

  159. 	if(false) {}

  160. 	else if(cmpr==1) for(var j=0; j<len; j++) tgt[toff+j] = data[off+j];

  161. 	else if(cmpr==3) UTIF.decode._decodeG3 (data, off, len, tgt, toff, img.width, fo);

  162. 	else if(cmpr==4) UTIF.decode._decodeG4 (data, off, len, tgt, toff, img.width, fo);

  163. 	else if(cmpr==5) UTIF.decode._decodeLZW(data, off, tgt, toff);

  164. 	else if(cmpr==6) UTIF.decode._decodeOldJPEG(img, data, off, len, tgt, toff);

  165. 	else if(cmpr==7) UTIF.decode._decodeNewJPEG(img, data, off, len, tgt, toff);

  166. 	else if(cmpr==8) {  var src = new Uint8Array(data.buffer,off,len);  var bin = pako["inflate"](src);  for(var i=0; i<bin.length; i++) tgt[toff+i]=bin[i];  }

  167. 	else if(cmpr==32773) UTIF.decode._decodePackBits(data, off, len, tgt, toff);

  168. 	else if(cmpr==32809) UTIF.decode._decodeThunder (data, off, len, tgt, toff);

  169. 	//else if(cmpr==34713) UTIF.decode._decodeNikon   (data, off, len, tgt, toff);

  170. 	else log("Unknown compression", cmpr);

  171. 

  172. 	if(img["t317"] && img["t317"][0]==2)

  173. 	{

  174. 		var noc = (img["t277"]?img["t277"][0]:1), h = (img["t278"] ? img["t278"][0] : img.height), bpr = img.width*noc;

  175. 		//log(noc);

  176. 		for(var y=0; y<h; y++)

  177. 		{

  178. 			var ntoff = toff+y*bpr;

  179. 			if(noc==3) for(var j=  3; j<bpr; j+=3)

  180. 			{

  181. 				tgt[ntoff+j  ] = (tgt[ntoff+j  ] + tgt[ntoff+j-3])&255;

  182. 				tgt[ntoff+j+1] = (tgt[ntoff+j+1] + tgt[ntoff+j-2])&255;

  183. 				tgt[ntoff+j+2] = (tgt[ntoff+j+2] + tgt[ntoff+j-1])&255;

  184. 			}

  185. 			else for(var j=noc; j<bpr; j++) tgt[ntoff+j] = (tgt[ntoff+j] + tgt[ntoff+j-noc])&255;

  186. 		}

  187. 	}

  188. }

  189. 

  190. UTIF.decode._decodeNikon = function(data, off, len, tgt, toff)

  191. {

  192. 	var nikon_tree = [

  193.     [ 0,1,5,1,1,1,1,1,1,2,0,0,0,0,0,0,	/* 12-bit lossy */

  194.       5,4,3,6,2,7,1,0,8,9,11,10,12 ],

  195.     [ 0,1,5,1,1,1,1,1,1,2,0,0,0,0,0,0,	/* 12-bit lossy after split */

  196.       0x39,0x5a,0x38,0x27,0x16,5,4,3,2,1,0,11,12,12 ],

  197.     [ 0,1,4,2,3,1,2,0,0,0,0,0,0,0,0,0,  /* 12-bit lossless */

  198.       5,4,6,3,7,2,8,1,9,0,10,11,12 ],

  199.     [ 0,1,4,3,1,1,1,1,1,2,0,0,0,0,0,0,	/* 14-bit lossy */

  200.       5,6,4,7,8,3,9,2,1,0,10,11,12,13,14 ],

  201.     [ 0,1,5,1,1,1,1,1,1,1,2,0,0,0,0,0,	/* 14-bit lossy after split */

  202.       8,0x5c,0x4b,0x3a,0x29,7,6,5,4,3,2,1,0,13,14 ],

  203.     [ 0,1,4,2,2,3,1,2,0,0,0,0,0,0,0,0,	/* 14-bit lossless */

  204.       7,6,8,5,9,4,10,3,11,12,2,0,1,13,14 ] ];

  205. 

  206. 	//struct decode *dindex;

  207. 	var ver0, ver1, vpred, hpred, csize;

  208. 	var i, min, max, step=0, huff=0, split=0, row, col, len, shl, diff;

  209. 

  210. 	log(data.slice(off,off+100));

  211. 	ver0 = data[off];  off++;

  212. 	ver1 = data[off];  off++;

  213. 	log(ver0.toString(16), ver1.toString(16), len);

  214. }

  215. 

  216. UTIF.decode._decodeNewJPEG = function(img, data, off, len, tgt, toff)

  217. {

  218. 	var tables = img["t347"], tlen = tables ? tables.length : 0, buff = new Uint8Array(tlen + len);

  219. 	

  220. 	if (tables)

  221. 	{

  222. 		var SOI = 216, EOI = 217, boff = 0;

  223. 		for (var i=0; i<(tlen-1); i++)

  224. 		{

  225. 			// Skip EOI marker from JPEGTables

  226. 			if (tables[i]==255 && tables[i+1]==EOI) break;

  227. 			buff[boff++] = tables[i];

  228. 		}

  229. 

  230. 		// Skip SOI marker from data

  231. 		var byte1 = data[off], byte2 = data[off + 1];

  232. 		if (byte1!=255 || byte2!=SOI)

  233. 		{

  234. 			buff[boff++] = byte1;

  235. 			buff[boff++] = byte2;

  236. 		}

  237. 		for (var i=2; i<len; i++) buff[boff++] = data[off+i];

  238. 	}

  239. 	else for (var i=0; i<len; i++) buff[i] = data[off+i];

  240. 

  241. 	if(img["t262"]==32803) // lossless JPEG (used in DNG files) is not available in JpegDecoder.

  242. 	{

  243. 		var bps = img["t258"][0], dcdr = new LosslessJpegDecoder();

  244. 		var out = dcdr.decode(buff), olen=out.length;

  245. 

  246. 		if(false) {}

  247. 		else if(bps==16) for(var i=0; i<olen; i++) {  tgt[toff++] = (out[i]&255);  tgt[toff++] = (out[i]>>>8);  }

  248. 		else if(bps==12) for(var i=0; i<olen; i+=2) {  tgt[toff++] = (out[i]>>>4);  tgt[toff++] = ((out[i]<<4)|(out[i+1]>>>8))&255;  tgt[toff++] = out[i+1]&255;  }

  249. 		else throw new Error("unsupported bit depth "+bps);

  250. 	}

  251. 	else

  252. 	{

  253. 		var parser = new UTIF.JpegDecoder();  parser.parse(buff);

  254. 		var decoded = parser.getData(parser.width, parser.height);

  255. 		for (var i=0; i<decoded.length; i++) tgt[toff + i] = decoded[i];

  256. 	}

  257. 

  258. 	// PhotometricInterpretation is 6 (YCbCr) for JPEG, but after decoding we populate data in

  259. 	// RGB format, so updating the tag value

  260. 	if(img["t262"][0] == 6)  img["t262"][0] = 2;

  261. }

  262. 

  263. UTIF.decode._decodeOldJPEGInit = function(img, data, off, len)

  264. {

  265. 	var SOI = 216, EOI = 217, DQT = 219, DHT = 196, DRI = 221, SOF0 = 192, SOS = 218;

  266. 	var joff = 0, soff = 0, tables, sosMarker, isTiled = false, i, j, k;

  267. 	var jpgIchgFmt    = img["t513"], jifoff = jpgIchgFmt ? jpgIchgFmt[0] : 0;

  268. 	var jpgIchgFmtLen = img["t514"], jiflen = jpgIchgFmtLen ? jpgIchgFmtLen[0] : 0;

  269. 	var soffTag       = img["t324"] || img["t273"] || jpgIchgFmt;

  270. 	var ycbcrss       = img["t530"], ssx = 0, ssy = 0;

  271. 	var spp           = img["t277"]?img["t277"][0]:1;

  272. 	var jpgresint     = img["t515"];

  273. 

  274. 	if(soffTag)

  275. 	{

  276. 		soff = soffTag[0];

  277. 		isTiled = (soffTag.length > 1);

  278. 	}

  279. 

  280. 	if(!isTiled)

  281. 	{

  282. 		if(data[off]==255 && data[off+1]==SOI) return { jpegOffset: off };

  283. 		if(jpgIchgFmt!=null)

  284. 		{

  285. 			if(data[off+jifoff]==255 && data[off+jifoff+1]==SOI) joff = off+jifoff;

  286. 			else log("JPEGInterchangeFormat does not point to SOI");

  287. 

  288. 			if(jpgIchgFmtLen==null) log("JPEGInterchangeFormatLength field is missing");

  289. 			else if(jifoff >= soff || (jifoff+jiflen) <= soff) log("JPEGInterchangeFormatLength field value is invalid");

  290. 

  291. 			if(joff != null) return { jpegOffset: joff };

  292. 		}

  293. 	}

  294. 

  295. 	if(ycbcrss!=null) {  ssx = ycbcrss[0];  ssy = ycbcrss[1];  }

  296. 

  297. 	if(jpgIchgFmt!=null)

  298. 		if(jpgIchgFmtLen!=null)

  299. 			if(jiflen >= 2 && (jifoff+jiflen) <= soff)

  300. 			{

  301. 				if(data[off+jifoff+jiflen-2]==255 && data[off+jifoff+jiflen-1]==SOI) tables = new Uint8Array(jiflen-2);

  302. 				else tables = new Uint8Array(jiflen);

  303. 

  304. 				for(i=0; i<tables.length; i++) tables[i] = data[off+jifoff+i];

  305. 				log("Incorrect JPEG interchange format: using JPEGInterchangeFormat offset to derive tables");

  306. 			}

  307. 			else log("JPEGInterchangeFormat+JPEGInterchangeFormatLength > offset to first strip or tile");

  308. 

  309. 	if(tables == null)

  310. 	{

  311. 		var ooff = 0, out = [];

  312. 		out[ooff++] = 255; out[ooff++] = SOI;

  313. 

  314. 		var qtables = img["t519"];

  315. 		if(qtables==null) throw new Error("JPEGQTables tag is missing");

  316. 		for(i=0; i<qtables.length; i++)

  317. 		{

  318. 			out[ooff++] = 255; out[ooff++] = DQT; out[ooff++] = 0; out[ooff++] = 67; out[ooff++] = i;

  319. 			for(j=0; j<64; j++) out[ooff++] = data[off+qtables[i]+j];

  320. 		}

  321. 

  322. 		for(k=0; k<2; k++)

  323. 		{

  324. 			var htables = img[(k == 0) ? "t520" : "t521"];

  325. 			if(htables==null) throw new Error(((k == 0) ? "JPEGDCTables" : "JPEGACTables") + " tag is missing");

  326. 			for(i=0; i<htables.length; i++)

  327. 			{

  328. 				out[ooff++] = 255; out[ooff++] = DHT;

  329. 				//out[ooff++] = 0; out[ooff++] = 67; out[ooff++] = i;

  330. 				var nc = 19;

  331. 				for(j=0; j<16; j++) nc += data[off+htables[i]+j];

  332. 

  333. 				out[ooff++] = (nc >>> 8); out[ooff++] = nc & 255;

  334. 				out[ooff++] = (i | (k << 4));

  335. 				for(j=0; j<16; j++) out[ooff++] = data[off+htables[i]+j];

  336. 				for(j=0; j<nc; j++) out[ooff++] = data[off+htables[i]+16+j];

  337. 			}

  338. 		}

  339. 

  340. 		out[ooff++] = 255; out[ooff++] = SOF0;

  341. 		out[ooff++] = 0;  out[ooff++] = 8 + 3*spp;  out[ooff++] = 8;

  342. 		out[ooff++] = (img.height >>> 8) & 255;  out[ooff++] = img.height & 255;

  343. 		out[ooff++] = (img.width  >>> 8) & 255;  out[ooff++] = img.width  & 255;

  344. 		out[ooff++] = spp;

  345. 		if(spp==1) {  out[ooff++] = 1;  out[ooff++] = 17;  out[ooff++] = 0;  }

  346. 		else for(i=0; i<3; i++)

  347. 		{

  348. 			out[ooff++] = i + 1;

  349. 			out[ooff++] = (i != 0) ? 17 : (((ssx & 15) << 4) | (ssy & 15));

  350. 			out[ooff++] = i;

  351. 		}

  352. 

  353. 		if(jpgresint!=null && jpgresint[0]!=0)

  354. 		{

  355. 			out[ooff++] = 255;  out[ooff++] = DRI;  out[ooff++] = 0;  out[ooff++] = 4;

  356. 			out[ooff++] = (jpgresint[0] >>> 8) & 255;

  357. 			out[ooff++] = jpgresint[0] & 255;

  358. 		}

  359. 

  360. 		tables = new Uint8Array(out);

  361. 	}

  362. 

  363. 	var sofpos = -1;

  364. 	i = 0;

  365. 	while(i < (tables.length - 1)) {

  366. 		if(tables[i]==255 && tables[i+1]==SOF0) {  sofpos = i; break;  }

  367. 		i++;

  368. 	}

  369. 

  370. 	if(sofpos == -1)

  371. 	{

  372. 		var tmptab = new Uint8Array(tables.length + 10 + 3*spp);

  373. 		tmptab.set(tables);

  374. 		var tmpoff = tables.length;

  375. 		sofpos = tables.length;

  376. 		tables = tmptab;

  377. 

  378. 		tables[tmpoff++] = 255; tables[tmpoff++] = SOF0;

  379. 		tables[tmpoff++] = 0;  tables[tmpoff++] = 8 + 3*spp;  tables[tmpoff++] = 8;

  380. 		tables[tmpoff++] = (img.height >>> 8) & 255;  tables[tmpoff++] = img.height & 255;

  381. 		tables[tmpoff++] = (img.width  >>> 8) & 255;  tables[tmpoff++] = img.width  & 255;

  382. 		tables[tmpoff++] = spp;

  383. 		if(spp==1) {  tables[tmpoff++] = 1;  tables[tmpoff++] = 17;  tables[tmpoff++] = 0;  }

  384. 		else for(i=0; i<3; i++)

  385. 		{

  386. 			tables[tmpoff++] = i + 1;

  387. 			tables[tmpoff++] = (i != 0) ? 17 : (((ssx & 15) << 4) | (ssy & 15));

  388. 			tables[tmpoff++] = i;

  389. 		}

  390. 	}

  391. 

  392. 	if(data[soff]==255 && data[soff+1]==SOS)

  393. 	{

  394. 		var soslen = (data[soff+2]<<8) | data[soff+3];

  395. 		sosMarker = new Uint8Array(soslen+2);

  396. 		sosMarker[0] = data[soff];  sosMarker[1] = data[soff+1]; sosMarker[2] = data[soff+2];  sosMarker[3] = data[soff+3];

  397. 		for(i=0; i<(soslen-2); i++) sosMarker[i+4] = data[soff+i+4];

  398. 	}

  399. 	else

  400. 	{

  401. 		sosMarker = new Uint8Array(2 + 6 + 2*spp);

  402. 		var sosoff = 0;

  403. 		sosMarker[sosoff++] = 255;  sosMarker[sosoff++] = SOS;

  404. 		sosMarker[sosoff++] = 0;  sosMarker[sosoff++] = 6 + 2*spp;  sosMarker[sosoff++] = spp;

  405. 		if(spp==1) {  sosMarker[sosoff++] = 1;  sosMarker[sosoff++] = 0;  }

  406. 		else for(i=0; i<3; i++)

  407. 		{

  408. 			sosMarker[sosoff++] = i+1;  sosMarker[sosoff++] = (i << 4) | i;

  409. 		}

  410. 		sosMarker[sosoff++] = 0;  sosMarker[sosoff++] = 63;  sosMarker[sosoff++] = 0;

  411. 	}

  412. 

  413. 	return { jpegOffset: off, tables: tables, sosMarker: sosMarker, sofPosition: sofpos };

  414. }

  415. 

  416. UTIF.decode._decodeOldJPEG = function(img, data, off, len, tgt, toff)

  417. {

  418. 	var i, dlen, tlen, buff, buffoff;

  419. 	var jpegData = UTIF.decode._decodeOldJPEGInit(img, data, off, len);

  420. 

  421. 	if(jpegData.jpegOffset!=null)

  422. 	{

  423. 		dlen = off+len-jpegData.jpegOffset;

  424. 		buff = new Uint8Array(dlen);

  425. 		for(i=0; i<dlen; i++) buff[i] = data[jpegData.jpegOffset+i];

  426. 	}

  427. 	else

  428. 	{

  429. 		tlen = jpegData.tables.length;

  430. 		buff = new Uint8Array(tlen + jpegData.sosMarker.length + len + 2);

  431. 		buff.set(jpegData.tables);

  432. 		buffoff = tlen;

  433. 

  434. 		buff[jpegData.sofPosition+5] = (img.height >>> 8) & 255;  buff[jpegData.sofPosition+6] = img.height & 255;

  435. 		buff[jpegData.sofPosition+7] = (img.width  >>> 8) & 255;  buff[jpegData.sofPosition+8] = img.width  & 255;

  436. 

  437. 		if(data[off]!=255 || data[off+1]!=SOS)

  438. 		{

  439. 			buff.set(jpegData.sosMarker, bufoff);

  440. 			bufoff += sosMarker.length;

  441. 		}

  442. 		for(i=0; i<len; i++) buff[bufoff++] = data[off+i];

  443. 		buff[bufoff++] = 255;  buff[bufoff++] = EOI;

  444. 	}

  445. 

  446. 	var parser = new UTIF.JpegDecoder();  parser.parse(buff);

  447. 	var decoded = parser.getData(parser.width, parser.height);

  448. 	for (var i=0; i<decoded.length; i++) tgt[toff + i] = decoded[i];

  449. 

  450. 	// PhotometricInterpretation is 6 (YCbCr) for JPEG, but after decoding we populate data in

  451. 	// RGB format, so updating the tag value

  452. 	if(img["t262"][0] == 6)  img["t262"][0] = 2;

  453. }

  454. 

  455. UTIF.decode._decodePackBits = function(data, off, len, tgt, toff)

  456. {

  457. 	var sa = new Int8Array(data.buffer), ta = new Int8Array(tgt.buffer), lim = off+len;

  458. 	while(off<lim)

  459. 	{

  460. 		var n = sa[off];  off++;

  461. 		if(n>=0  && n<128)    for(var i=0; i< n+1; i++) {  ta[toff]=sa[off];  toff++;  off++;   }

  462. 		if(n>=-127 && n<0) {  for(var i=0; i<-n+1; i++) {  ta[toff]=sa[off];  toff++;           }  off++;  }

  463. 	}

  464. }

  465. 

  466. UTIF.decode._decodeThunder = function(data, off, len, tgt, toff)

  467. {

  468. 	var d2 = [ 0, 1, 0, -1 ],  d3 = [ 0, 1, 2, 3, 0, -3, -2, -1 ];

  469. 	var lim = off+len, qoff = toff*2, px = 0;

  470. 	while(off<lim)

  471. 	{

  472. 		var b = data[off], msk = (b>>>6), n = (b&63);  off++;

  473. 		if(msk==3) { px=(n&15);  tgt[qoff>>>1] |= (px<<(4*(1-qoff&1)));  qoff++;   }

  474. 		if(msk==0) for(var i=0; i<n; i++) {  tgt[qoff>>>1] |= (px<<(4*(1-qoff&1)));  qoff++;   }

  475. 		if(msk==2) for(var i=0; i<2; i++) {  var d=(n>>>(3*(1-i)))&7;  if(d!=4) { px+=d3[d];  tgt[qoff>>>1] |= (px<<(4*(1-qoff&1)));  qoff++; }  }

  476. 		if(msk==1) for(var i=0; i<3; i++) {  var d=(n>>>(2*(2-i)))&3;  if(d!=2) { px+=d2[d];  tgt[qoff>>>1] |= (px<<(4*(1-qoff&1)));  qoff++; }  }

  477. 	}

  478. }

  479. 

  480. UTIF.decode._dmap = { "1":0,"011":1,"000011":2,"0000011":3, "010":-1,"000010":-2,"0000010":-3  };

  481. UTIF.decode._lens = ( function()

  482. {

  483. 	var addKeys = function(lens, arr, i0, inc) {  for(var i=0; i<arr.length; i++) lens[arr[i]] = i0 + i*inc;  }

  484. 

  485. 	var termW = "00110101,000111,0111,1000,1011,1100,1110,1111,10011,10100,00111,01000,001000,000011,110100,110101," // 15

  486. 	+ "101010,101011,0100111,0001100,0001000,0010111,0000011,0000100,0101000,0101011,0010011,0100100,0011000,00000010,00000011,00011010," // 31

  487. 	+ "00011011,00010010,00010011,00010100,00010101,00010110,00010111,00101000,00101001,00101010,00101011,00101100,00101101,00000100,00000101,00001010," // 47

  488. 	+ "00001011,01010010,01010011,01010100,01010101,00100100,00100101,01011000,01011001,01011010,01011011,01001010,01001011,00110010,00110011,00110100";

  489. 

  490. 	var termB = "0000110111,010,11,10,011,0011,0010,00011,000101,000100,0000100,0000101,0000111,00000100,00000111,000011000," // 15

  491. 	+ "0000010111,0000011000,0000001000,00001100111,00001101000,00001101100,00000110111,00000101000,00000010111,00000011000,000011001010,000011001011,000011001100,000011001101,000001101000,000001101001," // 31

  492. 	+ "000001101010,000001101011,000011010010,000011010011,000011010100,000011010101,000011010110,000011010111,000001101100,000001101101,000011011010,000011011011,000001010100,000001010101,000001010110,000001010111," // 47

  493. 	+ "000001100100,000001100101,000001010010,000001010011,000000100100,000000110111,000000111000,000000100111,000000101000,000001011000,000001011001,000000101011,000000101100,000001011010,000001100110,000001100111";

  494. 

  495. 	var makeW = "11011,10010,010111,0110111,00110110,00110111,01100100,01100101,01101000,01100111,011001100,011001101,011010010,011010011,011010100,011010101,011010110,"

  496. 	+ "011010111,011011000,011011001,011011010,011011011,010011000,010011001,010011010,011000,010011011";

  497. 

  498. 	var makeB = "0000001111,000011001000,000011001001,000001011011,000000110011,000000110100,000000110101,0000001101100,0000001101101,0000001001010,0000001001011,0000001001100,"

  499. 	+ "0000001001101,0000001110010,0000001110011,0000001110100,0000001110101,0000001110110,0000001110111,0000001010010,0000001010011,0000001010100,0000001010101,0000001011010,"

  500. 	+ "0000001011011,0000001100100,0000001100101";

  501. 

  502. 	var makeA = "00000001000,00000001100,00000001101,000000010010,000000010011,000000010100,000000010101,000000010110,000000010111,000000011100,000000011101,000000011110,000000011111";

  503. 

  504. 	termW = termW.split(",");  termB = termB.split(",");  makeW = makeW.split(",");  makeB = makeB.split(",");  makeA = makeA.split(",");

  505. 

  506. 	var lensW = {}, lensB = {};

  507. 	addKeys(lensW, termW, 0, 1);  addKeys(lensW, makeW, 64,64);  addKeys(lensW, makeA, 1792,64);

  508. 	addKeys(lensB, termB, 0, 1);  addKeys(lensB, makeB, 64,64);  addKeys(lensB, makeA, 1792,64);

  509. 	return [lensW, lensB];

  510. } )();

  511. 

  512. UTIF.decode._decodeG4 = function(data, off, slen, tgt, toff, w, fo)

  513. {

  514. 	var U = UTIF.decode, boff=off<<3, len=0, wrd="";	// previous starts with 1

  515. 	var line=[], pline=[];  for(var i=0; i<w; i++) pline.push(0);  pline=U._makeDiff(pline);

  516. 	var a0=0, a1=0, a2=0, b1=0, b2=0, clr=0;

  517. 	var y=0, mode="", toRead=0;

  518. 	var bipl = Math.ceil(w/8)*8;

  519. 

  520. 	while((boff>>>3)<off+slen)

  521. 	{

  522. 		b1 = U._findDiff(pline, a0+(a0==0?0:1), 1-clr), b2 = U._findDiff(pline, b1, clr);	// could be precomputed

  523. 		var bit =0;

  524. 		if(fo==1) bit = (data[boff>>>3]>>>(7-(boff&7)))&1;

  525. 		if(fo==2) bit = (data[boff>>>3]>>>(  (boff&7)))&1;

  526. 		boff++;  wrd+=bit;

  527. 		if(mode=="H")

  528. 		{

  529. 			if(U._lens[clr][wrd]!=null)

  530. 			{

  531. 				var dl=U._lens[clr][wrd];  wrd="";  len+=dl;

  532. 				if(dl<64) {  U._addNtimes(line,len,clr);  a0+=len;  clr=1-clr;  len=0;  toRead--;  if(toRead==0) mode="";  }

  533. 			}

  534. 		}

  535. 		else

  536. 		{

  537. 			if(wrd=="0001")  {  wrd="";  U._addNtimes(line,b2-a0,clr);  a0=b2;   }

  538. 			if(wrd=="001" )  {  wrd="";  mode="H";  toRead=2;  }

  539. 			if(U._dmap[wrd]!=null) {  a1 = b1+U._dmap[wrd];  U._addNtimes(line, a1-a0, clr);  a0=a1;  wrd="";  clr=1-clr;  }

  540. 		}

  541. 		if(line.length==w && mode=="")

  542. 		{

  543. 			U._writeBits(line, tgt, toff*8+y*bipl);

  544. 			clr=0;  y++;  a0=0;

  545. 			pline=U._makeDiff(line);  line=[];

  546. 		}

  547. 		//if(wrd.length>150) {  log(wrd);  break;  throw "e";  }

  548. 	}

  549. }

  550. 

  551. UTIF.decode._findDiff = function(line, x, clr) {  for(var i=0; i<line.length; i+=2) if(line[i]>=x && line[i+1]==clr)  return line[i];  }

  552. 

  553. UTIF.decode._makeDiff = function(line)

  554. {

  555. 	var out = [];  if(line[0]==1) out.push(0,1);

  556. 	for(var i=1; i<line.length; i++) if(line[i-1]!=line[i]) out.push(i, line[i]);

  557. 	out.push(line.length,0,line.length,1);  return out;

  558. }

  559. 

  560. UTIF.decode._decodeG3 = function(data, off, slen, tgt, toff, w, fo)

  561. {

  562. 	var U = UTIF.decode, boff=off<<3, len=0, wrd="";

  563. 	var line=[], pline=[];  for(var i=0; i<w; i++) line.push(0);

  564. 	var a0=0, a1=0, a2=0, b1=0, b2=0, clr=0;

  565. 	var y=-1, mode="", toRead=0, is1D=false;

  566. 	var bipl = Math.ceil(w/8)*8;

  567. 	while((boff>>>3)<off+slen)

  568. 	{

  569. 		b1 = U._findDiff(pline, a0+(a0==0?0:1), 1-clr), b2 = U._findDiff(pline, b1, clr);	// could be precomputed

  570. 		var bit =0;

  571. 		if(fo==1) bit = (data[boff>>>3]>>>(7-(boff&7)))&1;

  572. 		if(fo==2) bit = (data[boff>>>3]>>>(  (boff&7)))&1;

  573. 		boff++;  wrd+=bit;

  574. 

  575. 		if(is1D)

  576. 		{

  577. 			if(U._lens[clr][wrd]!=null)

  578. 			{

  579. 				var dl=U._lens[clr][wrd];  wrd="";  len+=dl;

  580. 				if(dl<64) {  U._addNtimes(line,len,clr);  clr=1-clr;  len=0;  }

  581. 			}

  582. 		}

  583. 		else

  584. 		{

  585. 			if(mode=="H")

  586. 			{

  587. 				if(U._lens[clr][wrd]!=null)

  588. 				{

  589. 					var dl=U._lens[clr][wrd];  wrd="";  len+=dl;

  590. 					if(dl<64) {  U._addNtimes(line,len,clr);  a0+=len;  clr=1-clr;  len=0;  toRead--;  if(toRead==0) mode="";  }

  591. 				}

  592. 			}

  593. 			else

  594. 			{

  595. 				if(wrd=="0001")  {  wrd="";  U._addNtimes(line,b2-a0,clr);  a0=b2;   }

  596. 				if(wrd=="001" )  {  wrd="";  mode="H";  toRead=2;  }

  597. 				if(U._dmap[wrd]!=null) {  a1 = b1+U._dmap[wrd];  U._addNtimes(line, a1-a0, clr);  a0=a1;  wrd="";  clr=1-clr;  }

  598. 			}

  599. 		}

  600. 		if(wrd.endsWith("000000000001")) // needed for some files

  601. 		{

  602. 			if(y>=0) U._writeBits(line, tgt, toff*8+y*bipl);

  603. 			if(fo==1) is1D = ((data[boff>>>3]>>>(7-(boff&7)))&1)==1;

  604. 			if(fo==2) is1D = ((data[boff>>>3]>>>(  (boff&7)))&1)==1;

  605. 			boff++;

  606. 			if(U._decodeG3.allow2D==null) U._decodeG3.allow2D=is1D;

  607. 			if(!U._decodeG3.allow2D) {  is1D = true;  boff--;  }

  608. 			//log("EOL",y, "next 1D:", is1D);

  609. 			wrd="";  clr=0;  y++;  a0=0;

  610. 			pline=U._makeDiff(line);  line=[];

  611. 		}

  612. 	}

  613. 	if(line.length==w) U._writeBits(line, tgt, toff*8+y*bipl);

  614. }

  615. 

  616. UTIF.decode._addNtimes = function(arr, n, val) {  for(var i=0; i<n; i++) arr.push(val);  }

  617. 

  618. UTIF.decode._writeBits = function(bits, tgt, boff)

  619. {

  620. 	for(var i=0; i<bits.length; i++) tgt[(boff+i)>>>3] |= (bits[i]<<(7-((boff+i)&7)));

  621. }

  622. 

  623. UTIF.decode._decodeLZW = function(data, off, tgt, toff)

  624. {

  625. 	if(UTIF.decode._lzwTab==null)

  626. 	{

  627. 		var tb=new Uint32Array(0xffff), tn=new Uint16Array(0xffff), chr=new Uint8Array(2e6);

  628. 		for(var i=0; i<256; i++) { chr[i<<2]=i;  tb[i]=i<<2;  tn[i]=1;  }

  629. 		UTIF.decode._lzwTab = [tb,tn,chr];

  630. 	}

  631. 	var copy = UTIF.decode._copyData;

  632. 	var tab = UTIF.decode._lzwTab[0], tln=UTIF.decode._lzwTab[1], chr=UTIF.decode._lzwTab[2], totl = 258, chrl = 258<<2;

  633. 	var bits = 9, boff = off<<3;  // offset in bits

  634. 

  635. 	var ClearCode = 256, EoiCode = 257;

  636. 	var v = 0, Code = 0, OldCode = 0;

  637. 	while(true)

  638. 	{

  639. 		v = (data[boff>>>3]<<16) | (data[(boff+8)>>>3]<<8) | data[(boff+16)>>>3];

  640. 		Code = ( v>>(24-(boff&7)-bits) )    &   ((1<<bits)-1);  boff+=bits;

  641. 

  642. 		if(Code==EoiCode) break;

  643. 		if(Code==ClearCode)

  644. 		{

  645. 			bits=9;  totl = 258;  chrl = 258<<2;

  646. 

  647. 			v = (data[boff>>>3]<<16) | (data[(boff+8)>>>3]<<8) | data[(boff+16)>>>3];

  648. 			Code = ( v>>(24-(boff&7)-bits) )    &   ((1<<bits)-1);  boff+=bits;

  649. 			if(Code==EoiCode) break;

  650. 			tgt[toff]=Code;  toff++;

  651. 		}

  652. 		else if(Code<totl)

  653. 		{

  654. 			var cd = tab[Code], cl = tln[Code];

  655. 			copy(chr,cd,tgt,toff,cl);  toff += cl;

  656. 

  657. 			if(OldCode>=totl) {  tab[totl] = chrl;  chr[tab[totl]] = cd[0];  tln[totl]=1;  chrl=(chrl+1+3)&~0x03;  totl++;  }

  658. 			else

  659. 			{

  660. 				tab[totl] = chrl;

  661. 				var nit = tab[OldCode], nil = tln[OldCode];

  662. 				copy(chr,nit,chr,chrl,nil);

  663. 				chr[chrl+nil]=chr[cd];  nil++;

  664. 				tln[totl]=nil;  totl++;

  665. 

  666. 				chrl=(chrl+nil+3)&~0x03;

  667. 			}

  668. 			if(totl+1==(1<<bits)) bits++;

  669. 		}

  670. 		else

  671. 		{

  672. 			if(OldCode>=totl) {  tab[totl] = chrl;  tln[totl]=0;  totl++;  }

  673. 			else

  674. 			{

  675. 				tab[totl] = chrl;

  676. 				var nit = tab[OldCode], nil = tln[OldCode];

  677. 				copy(chr,nit,chr,chrl,nil);

  678. 				chr[chrl+nil]=chr[chrl];  nil++;

  679. 				tln[totl]=nil;  totl++;

  680. 

  681. 				copy(chr,chrl,tgt,toff,nil);  toff += nil;

  682. 				chrl=(chrl+nil+3)&~0x03;

  683. 			}

  684. 			if(totl+1==(1<<bits)) bits++;

  685. 		}

  686. 		OldCode = Code;

  687. 	}

  688. }

  689. 

  690. UTIF.decode._copyData = function(s,so,t,to,l) {  for(var i=0;i<l;i+=4) {  t[to+i]=s[so+i];  t[to+i+1]=s[so+i+1];  t[to+i+2]=s[so+i+2];  t[to+i+3]=s[so+i+3];  }  }

  691. 

  692. UTIF.tags = {254:"NewSubfileType",255:"SubfileType",256:"ImageWidth",257:"ImageLength",258:"BitsPerSample",259:"Compression",262:"PhotometricInterpretation",266:"FillOrder",

  693. 			269:"DocumentName",270:"ImageDescription",271:"Make",272:"Model",273:"StripOffset",274:"Orientation",277:"SamplesPerPixel",278:"RowsPerStrip",

  694. 			279:"StripByteCounts",280:"MinSampleValue",281:"MaxSampleValue",282:"XResolution",283:"YResolution",284:"PlanarConfiguration",285:"PageName",

  695. 			286:"XPosition",287:"YPosition",

  696. 			292:"T4Options",296:"ResolutionUnit",297:"PageNumber",305:"Software",306:"DateTime",

  697. 			315:"Artist",316:"HostComputer",317:"Predictor",318:"WhitePoint",319:"PrimaryChromaticities",320:"ColorMap",

  698. 			321:"HalftoneHints",322:"TileWidth",

  699. 			323:"TileLength",324:"TileOffset",325:"TileByteCounts",330:"SubIFDs",336:"DotRange",338:"ExtraSample",339:"SampleFormat", 347:"JPEGTables",

  700. 			512:"JPEGProc",513:"JPEGInterchangeFormat",514:"JPEGInterchangeFormatLength",519:"JPEGQTables",520:"JPEGDCTables",521:"JPEGACTables",

  701. 			529:"YCbCrCoefficients",530:"YCbCrSubSampling",531:"YCbCrPositioning",532:"ReferenceBlackWhite",700:"XMP",

  702. 			33421:"CFARepeatPatternDim",33422:"CFAPattern",33432:"Copyright",33434:"ExposureTime",33437:"FNumber",33723:"IPTC/NAA",34377:"Photoshop",

  703. 			34665:"ExifIFD",34675:"ICC Profile",34850:"ExposureProgram",34853:"GPSInfo",34855:"ISOSpeedRatings",34858:"TimeZoneOffset",34859:"SelfTimeMode",

  704. 			36867:"DateTimeOriginal",36868:"DateTimeDigitized",

  705. 			37377:"ShutterSpeedValue",37378:"ApertureValue",37380:"ExposureBiasValue",37383:"MeteringMode",37385:"Flash",37386:"FocalLength",

  706. 			37390:"FocalPlaneXResolution",37391:"FocalPlaneYResolution",37392:"FocalPlaneResolutionUnit",37393:"ImageNumber",37398:"TIFF/EPStandardID",37399:"SensingMethod",

  707. 			37500:"MakerNote",37510:"UserComment",37724:"ImageSourceData",

  708. 			40092:"XPComment",40094:"XPKeywords",

  709. 			40961:"ColorSpace",40962:"PixelXDimension",40963:"PixelXDimension",41486:"FocalPlaneXResolution",41487:"FocalPlaneYResolution",41488:"FocalPlaneResolutionUnit",

  710. 			41985:"CustomRendered",41986:"ExposureMode",41987:"WhiteBalance",41990:"SceneCaptureType",

  711. 			50706:"DNGVersion",50707:"DNGBackwardVersion",50708:"UniqueCameraModel",50709:"LocalizedCameraModel",50710:"CFAPlaneColor",

  712. 			50711:"CFALayout",50712:"LinearizationTable",50713:"BlackLevelRepeatDim",50714:"BlackLevel",50716:"BlackLevelDeltaV",50717:"WhiteLevel",

  713. 			50718:"DefaultScale",50719:"DefaultCropOrigin",

  714. 			50720:"DefaultCropSize",50733:"BayerGreenSplit",50738:"AntiAliasStrength",

  715. 			50721:"ColorMatrix1",50722:"ColorMatrix2",50723:"CameraCalibration1",50724:"CameraCalibration2",50727:"AnalogBalance",50728:"AsShotNeutral",

  716. 			50730:"BaselineExposure",50731:"BaselineNoise",50732:"BaselineSharpness",50734:"LinearResponseLimit",50735:"CameraSerialNumber",50736:"LensInfo",50739:"ShadowScale",

  717. 			50740:"DNGPrivateData",50741:"MakerNoteSafety",50778:"CalibrationIlluminant1",50779:"CalibrationIlluminant2",50780:"BestQualityScale",

  718. 			50781:"RawDataUniqueID",50827:"OriginalRawFileName",50829:"ActiveArea",50830:"MaskedAreas",50931:"CameraCalibrationSignature",50932:"ProfileCalibrationSignature",

  719. 			50935:"NoiseReductionApplied",50936:"ProfileName",50937:"ProfileHueSatMapDims",50938:"ProfileHueSatMapData1",50939:"ProfileHueSatMapData2",

  720. 			50940:"ProfileToneCurve",50941:"ProfileEmbedPolicy",50942:"ProfileCopyright",

  721. 			50964:"ForwardMatrix1",50965:"ForwardMatrix2",50966:"PreviewApplicationName",50967:"PreviewApplicationVersion",50969:"PreviewSettingsDigest",

  722. 			50970:"PreviewColorSpace",50971:"PreviewDateTime",50972:"RawImageDigest",

  723. 			51008:"OpcodeList1",51009:"OpcodeList2",51022:"OpcodeList3",51041:"NoiseProfile",51089:"OriginalDefaultFinalSize",

  724. 			51090:"OriginalBestQualityFinalSize",51091:"OriginalDefaultCropSize",51125:"DefaultUserCrop"};

  725. 

  726. UTIF.ttypes = {  256:3,257:3,258:3,   259:3, 262:3,  273:4,  274:3, 277:3,278:4,279:4, 282:5, 283:5, 284:3, 286:5,287:5, 296:3, 305:2, 306:2, 338:3, 513:4, 514:4, 34665:4  };

  727. 

  728. UTIF._readIFD = function(bin, data, offset, ifds)

  729. {

  730. 	var cnt = bin.readUshort(data, offset);  offset+=2;

  731. 	var ifd = {};  ifds.push(ifd);

  732. 

  733. 	//log(">>>----------------");

  734. 	for(var i=0; i<cnt; i++)

  735. 	{

  736. 		var tag  = bin.readUshort(data, offset);    offset+=2;

  737. 		var type = bin.readUshort(data, offset);    offset+=2;

  738. 		var num  = bin.readUint  (data, offset);    offset+=4;

  739. 		var voff = bin.readUint  (data, offset);    offset+=4;

  740. 

  741. 		var arr = [];

  742. 		ifd["t"+tag] = arr;

  743. 		//ifd["t"+tag+"-"+UTIF.tags[tag]] = arr;

  744. 		if(type== 1 || type==7) {  for(var j=0; j<num; j++) arr.push(data[(num<5 ? offset-4 : voff)+j]); }

  745. 		if(type== 2) {  arr.push( bin.readASCII(data, (num<5 ? offset-4 : voff), num-1) );  }

  746. 		if(type== 3) {  for(var j=0; j<num; j++) arr.push(bin.readUshort(data, (num<3 ? offset-4 : voff)+2*j));  }

  747. 		if(type== 4) {  for(var j=0; j<num; j++) arr.push(bin.readUint  (data, (num<2 ? offset-4 : voff)+4*j));  }

  748. 		if(type== 5) {  for(var j=0; j<num; j++) arr.push(bin.readUint  (data, voff+j*8) / bin.readUint(data,voff+j*8+4));  }

  749. 		if(type== 8) {  for(var j=0; j<num; j++) arr.push(bin.readShort (data, (num<3 ? offset-4 : voff)+2*j));  }

  750. 		if(type== 9) {  for(var j=0; j<num; j++) arr.push(bin.readInt   (data, (num<2 ? offset-4 : voff)+4*j));  }

  751. 		if(type==10) {  for(var j=0; j<num; j++) arr.push(bin.readInt   (data, voff+j*8) / bin.readInt (data,voff+j*8+4));  }

  752. 		if(type==11) {  for(var j=0; j<num; j++) arr.push(bin.readFloat (data, voff+j*4));  }

  753. 		if(type==12) {  for(var j=0; j<num; j++) arr.push(bin.readDouble(data, voff+j*8));  }

  754. 		if(num!=0 && arr.length==0) log("unknown TIFF tag type: ", type, "num:",num);

  755. 		//log(tag, type, UTIF.tags[tag], arr);

  756. 		if(tag==330) for(var j=0; j<num; j++) UTIF._readIFD(bin, data, arr[j], ifds);

  757. 		//if(tag==34665) UTIF._readIFD(bin, data, arr[0], ifds);

  758. 	}

  759. 	//log("<<<---------------");

  760. 	return offset;

  761. }

  762. 

  763. UTIF._writeIFD = function(bin, data, offset, ifd)

  764. {

  765. 	var keys = Object.keys(ifd);

  766. 	bin.writeUshort(data, offset, keys.length);  offset+=2;

  767. 

  768. 	var eoff = offset + keys.length*12 + 4;

  769. 

  770. 	for(var ki=0; ki<keys.length; ki++)

  771. 	{

  772. 		var key = keys[ki];

  773. 		var tag = parseInt(key.slice(1)), type = UTIF.ttypes[tag];  if(type==null) throw new Error("unknown type of tag: "+tag);

  774. 		var val = ifd[key];  if(type==2) val=val[0]+"\u0000";  var num = val.length;

  775. 		bin.writeUshort(data, offset, tag );  offset+=2;

  776. 		bin.writeUshort(data, offset, type);  offset+=2;

  777. 		bin.writeUint  (data, offset, num );  offset+=4;

  778. 

  779. 		var dlen = [-1, 1, 1, 2, 4, 8, 0, 0, 0, 0, 0, 0, 8][type] * num;

  780. 		var toff = offset;

  781. 		if(dlen>4) {  bin.writeUint(data, offset, eoff);  toff=eoff;  }

  782. 

  783. 		if(type==2) {  bin.writeASCII(data, toff, val);   }

  784. 		if(type==3) {  for(var i=0; i<num; i++) bin.writeUshort(data, toff+2*i, val[i]);    }

  785. 		if(type==4) {  for(var i=0; i<num; i++) bin.writeUint  (data, toff+4*i, val[i]);    }

  786. 		if(type==5) {  for(var i=0; i<num; i++) {  bin.writeUint(data, toff+8*i, Math.round(val[i]*10000));  bin.writeUint(data, toff+8*i+4, 10000);  }   }

  787. 		if (type == 12) {  for (var i = 0; i < num; i++) bin.writeDouble(data, toff + 8 * i, val[i]); }

  788. 

  789. 		if(dlen>4) {  dlen += (dlen&1);  eoff += dlen;  }

  790. 		offset += 4;

  791. 	}

  792. 	return [offset, eoff];

  793. }

  794. 

  795. UTIF.toRGBA8 = function(out)

  796. {

  797. 	var w = out.width, h = out.height, area = w*h, qarea = area*4, data = out.data;

  798. 	var img = new Uint8Array(area*4);

  799. 	// 0: WhiteIsZero, 1: BlackIsZero, 2: RGB, 3: Palette color, 4: Transparency mask, 5: CMYK

  800. 	var intp = out["t262"][0], bps = (out["t258"]?Math.min(32,out["t258"][0]):1), isLE = out.isLE ? 1 : 0;

  801. 	//log("interpretation: ", intp, "bps", bps, out);

  802. 	if(false) {}

  803. 	else if(intp==0)

  804. 	{

  805. 		var bpl = Math.ceil(bps*w/8);

  806. 		for(var y=0; y<h; y++) {

  807. 			var off = y*bpl, io = y*w;

  808. 			if(bps== 1) for(var i=0; i<w; i++) {  var qi=(io+i)<<2, px=((data[off+(i>>3)])>>(7-  (i&7)))& 1;  img[qi]=img[qi+1]=img[qi+2]=( 1-px)*255;  img[qi+3]=255;    }

  809. 			if(bps== 4) for(var i=0; i<w; i++) {  var qi=(io+i)<<2, px=((data[off+(i>>1)])>>(4-4*(i&1)))&15;  img[qi]=img[qi+1]=img[qi+2]=(15-px)* 17;  img[qi+3]=255;    }

  810. 			if(bps== 8) for(var i=0; i<w; i++) {  var qi=(io+i)<<2, px=data[off+i];  img[qi]=img[qi+1]=img[qi+2]=255-px;  img[qi+3]=255;    }

  811. 		}

  812. 	}

  813. 	else if(intp==1)

  814. 	{

  815. 		var bpl = Math.ceil(bps*w/8);

  816. 		for(var y=0; y<h; y++) {

  817. 			var off = y*bpl, io = y*w;

  818. 			if(bps== 1) for(var i=0; i<w; i++) {  var qi=(io+i)<<2, px=((data[off+(i>>3)])>>(7-  (i&7)))&1;   img[qi]=img[qi+1]=img[qi+2]=(px)*255;  img[qi+3]=255;    }

  819. 			if(bps== 2) for(var i=0; i<w; i++) {  var qi=(io+i)<<2, px=((data[off+(i>>2)])>>(6-2*(i&3)))&3;   img[qi]=img[qi+1]=img[qi+2]=(px)* 85;  img[qi+3]=255;    }

  820. 			if(bps== 8) for(var i=0; i<w; i++) {  var qi=(io+i)<<2, px=data[off+i];  img[qi]=img[qi+1]=img[qi+2]=    px;  img[qi+3]=255;    }

  821. 			if(bps==16) for(var i=0; i<w; i++) {  var qi=(io+i)<<2, px=data[off+(2*i+isLE)];  img[qi]=img[qi+1]=img[qi+2]= Math.min(255,px);  img[qi+3]=255;    } // ladoga.tif

  822. 		}

  823. 	}

  824. 	else if(intp==2)

  825. 	{

  826. 		if(bps== 8) // this needs to be simplified ... how many channels are there???

  827. 		{

  828. 			if(out["t338"])

  829. 			{

  830. 				 if(out["t338"][0]>0) for(var i=0; i<qarea; i++) img[i] = data[i];	// sometimes t338 is 1 or 2 in case of Alpha

  831. 				 else  for(var i=0; i<qarea; i+=4) {  img[i] = data[i];  img[i+1] = data[i+1];  img[i+2] = data[i+2];  img[i+3] = 255;  }

  832. 			}

  833. 			else

  834. 			{

  835. 				var smpls = out["t258"]?out["t258"].length : 3;

  836. 				if(smpls==4) for(var i=0; i<qarea; i++) img[i] = data[i];

  837. 				if(smpls==3) for(var i=0; i< area; i++) {  var qi=i<<2, ti=i*3;  img[qi]=data[ti];  img[qi+1]=data[ti+1];  img[qi+2]=data[ti+2];  img[qi+3]=255;    }

  838. 			}

  839. 		}

  840. 		else  // 3x 16-bit channel

  841. 			for(var i=0; i<area; i++) {  var qi=i<<2, ti=i*6;  img[qi]=data[ti];  img[qi+1]=data[ti+2];  img[qi+2]=data[ti+4];  img[qi+3]=255;    }

  842. 	}

  843. 	else if(intp==3)

  844. 	{

  845. 		var map = out["t320"];

  846. 		for(var i=0; i<area; i++) {  var qi=i<<2, mi=data[i];  img[qi]=(map[mi]>>8);  img[qi+1]=(map[256+mi]>>8);  img[qi+2]=(map[512+mi]>>8);  img[qi+3]=255;    }

  847. 	}

  848. 	else if(intp==5) 

  849. 	{

  850. 		var smpls = out["t258"]?out["t258"].length : 4;

  851. 		var gotAlpha = smpls>4 ? 1 : 0;

  852. 		for(var i=0; i<area; i++) {

  853. 			var qi=i<<2, si=i*smpls;  var C=255-data[si], M=255-data[si+1], Y=255-data[si+2], K=(255-data[si+3])*(1/255);

  854. 			img[qi]=~~(C*K+0.5);  img[qi+1]=~~(M*K+0.5);  img[qi+2]=~~(Y*K+0.5);  img[qi+3]=255*(1-gotAlpha)+data[si+4]*gotAlpha;

  855. 		}

  856. 	}

  857. 	else log("Unknown Photometric interpretation: "+intp);

  858. 	return img;

  859. }

  860. 

  861. UTIF.replaceIMG = function()

  862. {

  863. 	var imgs = document.getElementsByTagName("img");

  864. 	for (var i=0; i<imgs.length; i++)

  865. 	{

  866. 		var img=imgs[i], src=img.getAttribute("src");  if(src==null) continue;

  867. 		var suff=src.split(".").pop().toLowerCase();

  868. 		if(suff!="tif" && suff!="tiff") continue;

  869. 		var xhr = new XMLHttpRequest();  UTIF._xhrs.push(xhr);  UTIF._imgs.push(img);

  870. 		xhr.open("GET", src);  xhr.responseType = "arraybuffer";

  871. 		xhr.onload = UTIF._imgLoaded;   xhr.send();

  872. 	}

  873. }

  874. 

  875. UTIF._xhrs = [];  UTIF._imgs = [];

  876. UTIF._imgLoaded = function(e)

  877. {

  878. 	var buff = e.target.response;

  879. 	var ifds = UTIF.decode(buff), page = ifds[0];  UTIF.decodeImages(buff, ifds);

  880. 	var rgba = UTIF.toRGBA8(page), w=page.width, h=page.height;

  881. 	var ind = UTIF._xhrs.indexOf(e.target), img = UTIF._imgs[ind];

  882. 	UTIF._xhrs.splice(ind,1);  UTIF._imgs.splice(ind,1);

  883. 	var cnv = document.createElement("canvas");  cnv.width=w;  cnv.height=h;

  884. 	var ctx = cnv.getContext("2d"), imgd = ctx.createImageData(w,h);

  885. 	for(var i=0; i<rgba.length; i++) imgd.data[i]=rgba[i];       ctx.putImageData(imgd,0,0);

  886. 	var attr = ["style","class","id"];

  887. 	for(var i=0; i<attr.length; i++) cnv.setAttribute(attr[i], img.getAttribute(attr[i]));

  888. 	img.parentNode.replaceChild(cnv,img);

  889. }

  890. 

  891. 

  892. UTIF._binBE =

  893. {

  894. 	nextZero   : function(data, o) {  while(data[o]!=0) o++;  return o;  },

  895. 	readUshort : function(buff, p) {  return (buff[p]<< 8) |  buff[p+1];  },

  896. 	readShort  : function(buff, p) {  var a=UTIF._binBE.ui8;  a[0]=buff[p+1];  a[1]=buff[p+0];                                    return UTIF._binBE. i16[0];  },

  897. 	readInt    : function(buff, p) {  var a=UTIF._binBE.ui8;  a[0]=buff[p+3];  a[1]=buff[p+2];  a[2]=buff[p+1];  a[3]=buff[p+0];  return UTIF._binBE. i32[0];  },

  898. 	readUint   : function(buff, p) {  var a=UTIF._binBE.ui8;  a[0]=buff[p+3];  a[1]=buff[p+2];  a[2]=buff[p+1];  a[3]=buff[p+0];  return UTIF._binBE.ui32[0];  },

  899. 	readASCII  : function(buff, p, l) {  var s = "";   for(var i=0; i<l; i++) s += String.fromCharCode(buff[p+i]);   return s; },

  900. 	readFloat  : function(buff, p) {  var a=UTIF._binBE.ui8;  for(var i=0;i<4;i++) a[i]=buff[p+3-i];  return UTIF._binBE.fl32[0];  },

  901. 	readDouble : function(buff, p) {  var a=UTIF._binBE.ui8;  for(var i=0;i<8;i++) a[i]=buff[p+7-i];  return UTIF._binBE.fl64[0];  },

  902. 

  903. 	writeUshort: function(buff, p, n) {  buff[p] = (n>> 8)&255;  buff[p+1] =  n&255;  },

  904. 	writeUint  : function(buff, p, n) {  buff[p] = (n>>24)&255;  buff[p+1] = (n>>16)&255;  buff[p+2] = (n>>8)&255;  buff[p+3] = (n>>0)&255;  },

  905. 	writeASCII : function(buff, p, s) {  for(var i = 0; i < s.length; i++)  buff[p+i] = s.charCodeAt(i);  },

  906. 	writeDouble: function(buff, p, n)

  907. 	{

  908. 		UTIF._binBE.fl64[0] = n;

  909. 		for (var i = 0; i < 8; i++) buff[p + i] = UTIF._binBE.ui8[7 - i];

  910. 	}

  911. }

  912. UTIF._binBE.ui8  = new Uint8Array  (8);

  913. UTIF._binBE.i16  = new Int16Array  (UTIF._binBE.ui8.buffer);

  914. UTIF._binBE.i32  = new Int32Array  (UTIF._binBE.ui8.buffer);

  915. UTIF._binBE.ui32 = new Uint32Array (UTIF._binBE.ui8.buffer);

  916. UTIF._binBE.fl32 = new Float32Array(UTIF._binBE.ui8.buffer);

  917. UTIF._binBE.fl64 = new Float64Array(UTIF._binBE.ui8.buffer);

  918. 

  919. UTIF._binLE =

  920. {

  921. 	nextZero   : UTIF._binBE.nextZero,

  922. 	readUshort : function(buff, p) {  return (buff[p+1]<< 8) |  buff[p];  },

  923. 	readShort  : function(buff, p) {  var a=UTIF._binBE.ui8;  a[0]=buff[p+0];  a[1]=buff[p+1];                                    return UTIF._binBE. i16[0];  },

  924. 	readInt    : function(buff, p) {  var a=UTIF._binBE.ui8;  a[0]=buff[p+0];  a[1]=buff[p+1];  a[2]=buff[p+2];  a[3]=buff[p+3];  return UTIF._binBE. i32[0];  },

  925. 	readUint   : function(buff, p) {  var a=UTIF._binBE.ui8;  a[0]=buff[p+0];  a[1]=buff[p+1];  a[2]=buff[p+2];  a[3]=buff[p+3];  return UTIF._binBE.ui32[0];  },

  926. 	readASCII  : UTIF._binBE.readASCII,

  927. 	readFloat  : function(buff, p) {  var a=UTIF._binBE.ui8;  for(var i=0;i<4;i++) a[i]=buff[p+  i];  return UTIF._binBE.fl32[0];  },

  928. 	readDouble : function(buff, p) {  var a=UTIF._binBE.ui8;  for(var i=0;i<8;i++) a[i]=buff[p+  i];  return UTIF._binBE.fl64[0];  }

  929. }

  930. UTIF._copyTile = function(tb, tw, th, b, w, h, xoff, yoff)

  931. {

  932. 	//log("copyTile", tw, th,  w, h, xoff, yoff);

  933. 	var xlim = Math.min(tw, w-xoff);

  934. 	var ylim = Math.min(th, h-yoff);

  935. 	for(var y=0; y<ylim; y++)

  936. 	{

  937. 		var tof = (yoff+y)*w+xoff;

  938. 		var sof = y*tw;

  939. 		for(var x=0; x<xlim; x++) b[tof+x] = tb[sof+x];

  940. 	}

  941. }

  942. 

  943. 

  944. })(UTIF, pako);

  945. })();