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MIT License
Copyright (c) 2017 Photopea
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

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# UTIF.js
A small, fast and advanced TIFF / EXIF (+ DNG and other TIFF-ish files) decoder and encoder. It is the main TIFF library for [Photopea image editor](https://www.photopea.com). Try to open your TIFF file with Photopea to see, if UTIF.js can parse it.
* Supports Black & White, Grayscale, RGB and Paletted images
* Supports Fax 3 and Fax 4 (CCITT), JPEG, LZW, PackBits and other compressions (1,3,4,5,6,7,8,32773,32809)
* E.g. [this 8 MPix image](//www.photopea.com/api/img/G4.TIF) with Fax 4 compression is just 56 kB ( [Open in Photopea](https://www.photopea.com?p=%7B%22files%22:%5B%22//www.photopea.com/api/img/G4.TIF%22%5D%7D) )
## Installation
Download and include the `UTIF.js` file in your code. If you're in NodeJS or otherwise using NPM, run:
```sh
npm install utif
```
#### `UTIF.decode(buffer)`
* `buffer`: ArrayBuffer containing TIFF or EXIF data
* returns an array of "IFDs" (image file directories). Each IFD is an object, keys are "tXYZ" (XYZ is a TIFF tag number), values are values of these tags. You can get the the dimension (and other properties, "metadata") of the image without decompressing pixel data.
#### `UTIF.decodeImages(buffer, ifds)`
* `buffer`: ArrayBuffer containing TIFF or EXIF data
* `ifds`: the output of UTIF.decode()
* loops through each IFD. If there is an image inside it, it is decoded and three new properties are added to the IFD:
* * `width`: the width of the image
* * `height`: the height of the image
* * `data`: decompressed pixel data of the image
TIFF files may have various number of channels and various color depth. The interpretation of `data` depends on many tags (see the [TIFF 6 specification](http://www.npes.org/pdf/TIFF-v6.pdf)). The following function converts any TIFF image into a 8-bit RGBA image.
#### `UTIF.toRGBA8(ifd)`
* `ifd`: image file directory (element of "ifds" returned by UTIF.decode(), processed by UTIF.decodeImages())
* returns Uint8Array of the image in RGBA format, 8 bits per channel (ready to use in context2d.putImageData() etc.)
### Example
```javascript
function imgLoaded(e) {
var ifds = UTIF.decode(e.target.response);
UTIF.decodeImages(e.target.response, ifds)
var rgba = UTIF.toRGBA8(ifds[0]); // Uint8Array with RGBA pixels
console.log(ifds[0].width, ifds[0].height, ifds[0]);
}
var xhr = new XMLHttpRequest();
xhr.open("GET", "my_image.tif");
xhr.responseType = "arraybuffer";
xhr.onload = imgLoaded; xhr.send();
```
## Use TIFF images in HTML
If you are not a programmer, you can use TIFF images directly inside the `<img>` element of HTML. Then, it is enough to call `UTIF.replaceIMG()` once at some point.
#### `UTIF.replaceIMG()`
```html
<body onload="UTIF.replaceIMG()">
...
<img src="image.tif" /> <img src="dog.tif" /> ...
```
And UTIF.js will do the rest. Internally, an Image elements will be replaced by a Canvas elements. The attributes "id", "class" and "style" will be copied from the original Image to the new Canvas. Use CSS to style such images.
## Encoding TIFF images
You should not save images into TIFF format in the 21st century. Save them as PNG instead (e.g. using [UPNG.js](https://github.com/photopea/UPNG.js)). If you still want to use TIFF format for some reason, here it is.
#### `UTIF.encodeImage(rgba, w, h, metadata)`
* `rgba`: ArrayBuffer containing RGBA pixel data
* `w`: image width
* `h`: image height
* `metadata` [optional]: IFD object (see below)
* returns ArrayBuffer of the binary TIFF file. No compression right now.
#### `UTIF.encode(ifds)`
* `ifds`: array of IFDs (image file directories). An IFD is a JS object with properties "tXYZ" (where XYZ are TIFF tags)
* returns ArrayBuffer of binary data. You can use it to encode EXIF data.
## Dependencies
TIFF format sometimes uses Inflate algorithm for compression (but it is quite rare). Right now, UTIF.js calls [Pako.js](https://github.com/nodeca/pako) for the Inflate method.
TIFF format sometimes uses JPEG compression (but it is quite rare). Right now, UTIF.js calls "JpegDecoder" constructor, which comes from [pdf.js](https://github.com/mozilla/pdf.js). You can find it "separated" from pdf.js in libraries such as jpg.js.

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;(function(){
var UTIF = {};
// Make available for import by `require()`
if (typeof module == "object") {module.exports = UTIF;}
else {self.UTIF = UTIF;}
var pako;
if (typeof require == "function") {pako = require("pako");}
else {pako = self.pako;}
function log() { if (typeof process=="undefined" || process.env.NODE_ENV=="development") console.log.apply(console, arguments); }
(function(UTIF, pako){
// Following lines add a JPEG decoder to UTIF.JpegDecoder
(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=
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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>=
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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");
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|
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*
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>>
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]=
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,
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/
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===
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=
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];
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: "+
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]=
(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+=
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*
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,
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*
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)+
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?
this.K(a):this.J(a);if(f)return this.H(a)}return a}}; UTIF.JpegDecoder=g})()})();
//UTIF.JpegDecoder = window.JpegDecoder;
UTIF.encodeImage = function(rgba, w, h, metadata)
{
var idf = { "t256":[w], "t257":[h], "t258":[8,8,8,8], "t259":[1], "t262":[2], "t273":[1000], // strips offset
"t277":[4], "t278":[h], /* rows per strip */ "t279":[w*h*4], // strip byte counts
"t282":[1], "t283":[1], "t284":[1], "t286":[0], "t287":[0], "t296":[1], "t305": ["Photopea (UTIF.js)"], "t338":[1]
};
if (metadata) for (var i in metadata) idf[i] = metadata[i];
var prfx = new Uint8Array(UTIF.encode([idf]));
var img = new Uint8Array(rgba);
var data = new Uint8Array(1000+w*h*4);
for(var i=0; i<prfx.length; i++) data[i] = prfx[i];
for(var i=0; i<img .length; i++) data[1000+i] = img[i];
return data.buffer;
}
UTIF.encode = function(ifds)
{
var data = new Uint8Array(20000), offset = 4, bin = UTIF._binBE;
data[0]=77; data[1]=77; data[3]=42;
var ifdo = 8;
bin.writeUint(data, offset, ifdo); offset+=4;
for(var i=0; i<ifds.length; i++)
{
var noffs = UTIF._writeIFD(bin, data, ifdo, ifds[i]);
ifdo = noffs[1];
if(i<ifds.length-1) bin.writeUint(data, noffs[0], ifdo);
}
return data.slice(0, ifdo).buffer;
}
//UTIF.encode._writeIFD
UTIF.decode = function(buff)
{
UTIF.decode._decodeG3.allow2D = null;
var data = new Uint8Array(buff), offset = 0;
var id = UTIF._binBE.readASCII(data, offset, 2); offset+=2;
var bin = id=="II" ? UTIF._binLE : UTIF._binBE;
var num = bin.readUshort(data, offset); offset+=2;
var ifdo = bin.readUint(data, offset); offset+=4;
var ifds = [];
while(true)
{
var noff = UTIF._readIFD(bin, data, ifdo, ifds);
//var ifd = ifds[ifds.length-1]; if(ifd["t34665"]) { ifd.exifIFD = []; UTIF._readIFD(bin, data, ifd["t34665"][0], ifd.exifIFD); }
ifdo = bin.readUint(data, noff);
if(ifdo==0) break;
}
return ifds;
}
UTIF.decodeImages = function(buff, ifds)
{
var data = new Uint8Array(buff);
var id = UTIF._binBE.readASCII(data, 0, 2);
for(var ii=0; ii<ifds.length; ii++)
{
var img = ifds[ii];
if(img["t256"]==null) continue; // EXIF files don't have TIFF tags
img.isLE = id=="II";
img.width = img["t256"][0]; //delete img["t256"];
img.height = img["t257"][0]; //delete img["t257"];
var cmpr = img["t259"] ? img["t259"][0] : 1; //delete img["t259"];
var fo = img["t266"] ? img["t266"][0] : 1; //delete img["t266"];
if(img["t284"] && img["t284"][0]==2) log("PlanarConfiguration 2 should not be used!");
var bipp = (img["t258"]?Math.min(32,img["t258"][0]):1) * (img["t277"]?img["t277"][0]:1); // bits per pixel
var bipl = Math.ceil(img.width*bipp/8)*8;
var soff = img["t273"]; if(soff==null) soff = img["t324"];
var bcnt = img["t279"]; if(cmpr==1 && soff.length==1) bcnt = [img.height*(bipl>>>3)]; if(bcnt==null) bcnt = img["t325"];
var bytes = new Uint8Array(img.height*(bipl>>>3)), bilen = 0;
if(img["t322"]!=null) // tiled
{
var tw = img["t322"][0], th = img["t323"][0];
var tx = Math.floor((img.width + tw - 1) / tw);
var ty = Math.floor((img.height + th - 1) / th);
var tbuff = new Uint8Array(Math.ceil(tw*th*bipp/8)|0);
for(var y=0; y<ty; y++)
for(var x=0; x<tx; x++)
{
var i = y*tx+x; for(var j=0; j<tbuff.length; j++) tbuff[j]=0;
UTIF.decode._decompress(img, data, soff[i], bcnt[i], cmpr, tbuff, 0, fo);
// Might be required for 7 too. Need to check
if (cmpr==6) bytes = tbuff;
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);
}
bilen = bytes.length*8;
}
else // stripped
{
var rps = img["t278"] ? img["t278"][0] : img.height; rps = Math.min(rps, img.height);
for(var i=0; i<soff.length; i++)
{
UTIF.decode._decompress(img, data, soff[i], bcnt[i], cmpr, bytes, Math.ceil(bilen/8)|0, fo);
bilen += bipl * rps;
}
bilen = Math.min(bilen, bytes.length*8);
}
img.data = new Uint8Array(bytes.buffer, 0, Math.ceil(bilen/8)|0);
}
}
UTIF.decode._decompress = function(img, data, off, len, cmpr, tgt, toff, fo) // fill order
{
//console.log("compression", cmpr);
if(false) {}
else if(cmpr==1) for(var j=0; j<len; j++) tgt[toff+j] = data[off+j];
else if(cmpr==3) UTIF.decode._decodeG3 (data, off, len, tgt, toff, img.width, fo);
else if(cmpr==4) UTIF.decode._decodeG4 (data, off, len, tgt, toff, img.width, fo);
else if(cmpr==5) UTIF.decode._decodeLZW(data, off, tgt, toff);
else if(cmpr==6) UTIF.decode._decodeOldJPEG(img, data, off, len, tgt, toff);
else if(cmpr==7) UTIF.decode._decodeNewJPEG(img, data, off, len, tgt, toff);
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]; }
else if(cmpr==32773) UTIF.decode._decodePackBits(data, off, len, tgt, toff);
else if(cmpr==32809) UTIF.decode._decodeThunder (data, off, len, tgt, toff);
//else if(cmpr==34713) UTIF.decode._decodeNikon (data, off, len, tgt, toff);
else log("Unknown compression", cmpr);
if(img["t317"] && img["t317"][0]==2)
{
var noc = (img["t277"]?img["t277"][0]:1), h = (img["t278"] ? img["t278"][0] : img.height), bpr = img.width*noc;
//log(noc);
for(var y=0; y<h; y++)
{
var ntoff = toff+y*bpr;
if(noc==3) for(var j= 3; j<bpr; j+=3)
{
tgt[ntoff+j ] = (tgt[ntoff+j ] + tgt[ntoff+j-3])&255;
tgt[ntoff+j+1] = (tgt[ntoff+j+1] + tgt[ntoff+j-2])&255;
tgt[ntoff+j+2] = (tgt[ntoff+j+2] + tgt[ntoff+j-1])&255;
}
else for(var j=noc; j<bpr; j++) tgt[ntoff+j] = (tgt[ntoff+j] + tgt[ntoff+j-noc])&255;
}
}
}
UTIF.decode._decodeNikon = function(data, off, len, tgt, toff)
{
var nikon_tree = [
[ 0,1,5,1,1,1,1,1,1,2,0,0,0,0,0,0, /* 12-bit lossy */
5,4,3,6,2,7,1,0,8,9,11,10,12 ],
[ 0,1,5,1,1,1,1,1,1,2,0,0,0,0,0,0, /* 12-bit lossy after split */
0x39,0x5a,0x38,0x27,0x16,5,4,3,2,1,0,11,12,12 ],
[ 0,1,4,2,3,1,2,0,0,0,0,0,0,0,0,0, /* 12-bit lossless */
5,4,6,3,7,2,8,1,9,0,10,11,12 ],
[ 0,1,4,3,1,1,1,1,1,2,0,0,0,0,0,0, /* 14-bit lossy */
5,6,4,7,8,3,9,2,1,0,10,11,12,13,14 ],
[ 0,1,5,1,1,1,1,1,1,1,2,0,0,0,0,0, /* 14-bit lossy after split */
8,0x5c,0x4b,0x3a,0x29,7,6,5,4,3,2,1,0,13,14 ],
[ 0,1,4,2,2,3,1,2,0,0,0,0,0,0,0,0, /* 14-bit lossless */
7,6,8,5,9,4,10,3,11,12,2,0,1,13,14 ] ];
//struct decode *dindex;
var ver0, ver1, vpred, hpred, csize;
var i, min, max, step=0, huff=0, split=0, row, col, len, shl, diff;
log(data.slice(off,off+100));
ver0 = data[off]; off++;
ver1 = data[off]; off++;
log(ver0.toString(16), ver1.toString(16), len);
}
UTIF.decode._decodeNewJPEG = function(img, data, off, len, tgt, toff)
{
var tables = img["t347"], tlen = tables ? tables.length : 0, buff = new Uint8Array(tlen + len);
if (tables)
{
var SOI = 216, EOI = 217, boff = 0;
for (var i=0; i<(tlen-1); i++)
{
// Skip EOI marker from JPEGTables
if (tables[i]==255 && tables[i+1]==EOI) break;
buff[boff++] = tables[i];
}
// Skip SOI marker from data
var byte1 = data[off], byte2 = data[off + 1];
if (byte1!=255 || byte2!=SOI)
{
buff[boff++] = byte1;
buff[boff++] = byte2;
}
for (var i=2; i<len; i++) buff[boff++] = data[off+i];
}
else for (var i=0; i<len; i++) buff[i] = data[off+i];
if(img["t262"]==32803) // lossless JPEG (used in DNG files) is not available in JpegDecoder.
{
var bps = img["t258"][0], dcdr = new LosslessJpegDecoder();
var out = dcdr.decode(buff), olen=out.length;
if(false) {}
else if(bps==16) for(var i=0; i<olen; i++) { tgt[toff++] = (out[i]&255); tgt[toff++] = (out[i]>>>8); }
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; }
else throw new Error("unsupported bit depth "+bps);
}
else
{
var parser = new UTIF.JpegDecoder(); parser.parse(buff);
var decoded = parser.getData(parser.width, parser.height);
for (var i=0; i<decoded.length; i++) tgt[toff + i] = decoded[i];
}
// PhotometricInterpretation is 6 (YCbCr) for JPEG, but after decoding we populate data in
// RGB format, so updating the tag value
if(img["t262"][0] == 6) img["t262"][0] = 2;
}
UTIF.decode._decodeOldJPEGInit = function(img, data, off, len)
{
var SOI = 216, EOI = 217, DQT = 219, DHT = 196, DRI = 221, SOF0 = 192, SOS = 218;
var joff = 0, soff = 0, tables, sosMarker, isTiled = false, i, j, k;
var jpgIchgFmt = img["t513"], jifoff = jpgIchgFmt ? jpgIchgFmt[0] : 0;
var jpgIchgFmtLen = img["t514"], jiflen = jpgIchgFmtLen ? jpgIchgFmtLen[0] : 0;
var soffTag = img["t324"] || img["t273"] || jpgIchgFmt;
var ycbcrss = img["t530"], ssx = 0, ssy = 0;
var spp = img["t277"]?img["t277"][0]:1;
var jpgresint = img["t515"];
if(soffTag)
{
soff = soffTag[0];
isTiled = (soffTag.length > 1);
}
if(!isTiled)
{
if(data[off]==255 && data[off+1]==SOI) return { jpegOffset: off };
if(jpgIchgFmt!=null)
{
if(data[off+jifoff]==255 && data[off+jifoff+1]==SOI) joff = off+jifoff;
else log("JPEGInterchangeFormat does not point to SOI");
if(jpgIchgFmtLen==null) log("JPEGInterchangeFormatLength field is missing");
else if(jifoff >= soff || (jifoff+jiflen) <= soff) log("JPEGInterchangeFormatLength field value is invalid");
if(joff != null) return { jpegOffset: joff };
}
}
if(ycbcrss!=null) { ssx = ycbcrss[0]; ssy = ycbcrss[1]; }
if(jpgIchgFmt!=null)
if(jpgIchgFmtLen!=null)
if(jiflen >= 2 && (jifoff+jiflen) <= soff)
{
if(data[off+jifoff+jiflen-2]==255 && data[off+jifoff+jiflen-1]==SOI) tables = new Uint8Array(jiflen-2);
else tables = new Uint8Array(jiflen);
for(i=0; i<tables.length; i++) tables[i] = data[off+jifoff+i];
log("Incorrect JPEG interchange format: using JPEGInterchangeFormat offset to derive tables");
}
else log("JPEGInterchangeFormat+JPEGInterchangeFormatLength > offset to first strip or tile");
if(tables == null)
{
var ooff = 0, out = [];
out[ooff++] = 255; out[ooff++] = SOI;
var qtables = img["t519"];
if(qtables==null) throw new Error("JPEGQTables tag is missing");
for(i=0; i<qtables.length; i++)
{
out[ooff++] = 255; out[ooff++] = DQT; out[ooff++] = 0; out[ooff++] = 67; out[ooff++] = i;
for(j=0; j<64; j++) out[ooff++] = data[off+qtables[i]+j];
}
for(k=0; k<2; k++)
{
var htables = img[(k == 0) ? "t520" : "t521"];
if(htables==null) throw new Error(((k == 0) ? "JPEGDCTables" : "JPEGACTables") + " tag is missing");
for(i=0; i<htables.length; i++)
{
out[ooff++] = 255; out[ooff++] = DHT;
//out[ooff++] = 0; out[ooff++] = 67; out[ooff++] = i;
var nc = 19;
for(j=0; j<16; j++) nc += data[off+htables[i]+j];
out[ooff++] = (nc >>> 8); out[ooff++] = nc & 255;
out[ooff++] = (i | (k << 4));
for(j=0; j<16; j++) out[ooff++] = data[off+htables[i]+j];
for(j=0; j<nc; j++) out[ooff++] = data[off+htables[i]+16+j];
}
}
out[ooff++] = 255; out[ooff++] = SOF0;
out[ooff++] = 0; out[ooff++] = 8 + 3*spp; out[ooff++] = 8;
out[ooff++] = (img.height >>> 8) & 255; out[ooff++] = img.height & 255;
out[ooff++] = (img.width >>> 8) & 255; out[ooff++] = img.width & 255;
out[ooff++] = spp;
if(spp==1) { out[ooff++] = 1; out[ooff++] = 17; out[ooff++] = 0; }
else for(i=0; i<3; i++)
{
out[ooff++] = i + 1;
out[ooff++] = (i != 0) ? 17 : (((ssx & 15) << 4) | (ssy & 15));
out[ooff++] = i;
}
if(jpgresint!=null && jpgresint[0]!=0)
{
out[ooff++] = 255; out[ooff++] = DRI; out[ooff++] = 0; out[ooff++] = 4;
out[ooff++] = (jpgresint[0] >>> 8) & 255;
out[ooff++] = jpgresint[0] & 255;
}
tables = new Uint8Array(out);
}
var sofpos = -1;
i = 0;
while(i < (tables.length - 1)) {
if(tables[i]==255 && tables[i+1]==SOF0) { sofpos = i; break; }
i++;
}
if(sofpos == -1)
{
var tmptab = new Uint8Array(tables.length + 10 + 3*spp);
tmptab.set(tables);
var tmpoff = tables.length;
sofpos = tables.length;
tables = tmptab;
tables[tmpoff++] = 255; tables[tmpoff++] = SOF0;
tables[tmpoff++] = 0; tables[tmpoff++] = 8 + 3*spp; tables[tmpoff++] = 8;
tables[tmpoff++] = (img.height >>> 8) & 255; tables[tmpoff++] = img.height & 255;
tables[tmpoff++] = (img.width >>> 8) & 255; tables[tmpoff++] = img.width & 255;
tables[tmpoff++] = spp;
if(spp==1) { tables[tmpoff++] = 1; tables[tmpoff++] = 17; tables[tmpoff++] = 0; }
else for(i=0; i<3; i++)
{
tables[tmpoff++] = i + 1;
tables[tmpoff++] = (i != 0) ? 17 : (((ssx & 15) << 4) | (ssy & 15));
tables[tmpoff++] = i;
}
}
if(data[soff]==255 && data[soff+1]==SOS)
{
var soslen = (data[soff+2]<<8) | data[soff+3];
sosMarker = new Uint8Array(soslen+2);
sosMarker[0] = data[soff]; sosMarker[1] = data[soff+1]; sosMarker[2] = data[soff+2]; sosMarker[3] = data[soff+3];
for(i=0; i<(soslen-2); i++) sosMarker[i+4] = data[soff+i+4];
}
else
{
sosMarker = new Uint8Array(2 + 6 + 2*spp);
var sosoff = 0;
sosMarker[sosoff++] = 255; sosMarker[sosoff++] = SOS;
sosMarker[sosoff++] = 0; sosMarker[sosoff++] = 6 + 2*spp; sosMarker[sosoff++] = spp;
if(spp==1) { sosMarker[sosoff++] = 1; sosMarker[sosoff++] = 0; }
else for(i=0; i<3; i++)
{
sosMarker[sosoff++] = i+1; sosMarker[sosoff++] = (i << 4) | i;
}
sosMarker[sosoff++] = 0; sosMarker[sosoff++] = 63; sosMarker[sosoff++] = 0;
}
return { jpegOffset: off, tables: tables, sosMarker: sosMarker, sofPosition: sofpos };
}
UTIF.decode._decodeOldJPEG = function(img, data, off, len, tgt, toff)
{
var i, dlen, tlen, buff, buffoff;
var jpegData = UTIF.decode._decodeOldJPEGInit(img, data, off, len);
if(jpegData.jpegOffset!=null)
{
dlen = off+len-jpegData.jpegOffset;
buff = new Uint8Array(dlen);
for(i=0; i<dlen; i++) buff[i] = data[jpegData.jpegOffset+i];
}
else
{
tlen = jpegData.tables.length;
buff = new Uint8Array(tlen + jpegData.sosMarker.length + len + 2);
buff.set(jpegData.tables);
buffoff = tlen;
buff[jpegData.sofPosition+5] = (img.height >>> 8) & 255; buff[jpegData.sofPosition+6] = img.height & 255;
buff[jpegData.sofPosition+7] = (img.width >>> 8) & 255; buff[jpegData.sofPosition+8] = img.width & 255;
if(data[off]!=255 || data[off+1]!=SOS)
{
buff.set(jpegData.sosMarker, bufoff);
bufoff += sosMarker.length;
}
for(i=0; i<len; i++) buff[bufoff++] = data[off+i];
buff[bufoff++] = 255; buff[bufoff++] = EOI;
}
var parser = new UTIF.JpegDecoder(); parser.parse(buff);
var decoded = parser.getData(parser.width, parser.height);
for (var i=0; i<decoded.length; i++) tgt[toff + i] = decoded[i];
// PhotometricInterpretation is 6 (YCbCr) for JPEG, but after decoding we populate data in
// RGB format, so updating the tag value
if(img["t262"][0] == 6) img["t262"][0] = 2;
}
UTIF.decode._decodePackBits = function(data, off, len, tgt, toff)
{
var sa = new Int8Array(data.buffer), ta = new Int8Array(tgt.buffer), lim = off+len;
while(off<lim)
{
var n = sa[off]; off++;
if(n>=0 && n<128) for(var i=0; i< n+1; i++) { ta[toff]=sa[off]; toff++; off++; }
if(n>=-127 && n<0) { for(var i=0; i<-n+1; i++) { ta[toff]=sa[off]; toff++; } off++; }
}
}
UTIF.decode._decodeThunder = function(data, off, len, tgt, toff)
{
var d2 = [ 0, 1, 0, -1 ], d3 = [ 0, 1, 2, 3, 0, -3, -2, -1 ];
var lim = off+len, qoff = toff*2, px = 0;
while(off<lim)
{
var b = data[off], msk = (b>>>6), n = (b&63); off++;
if(msk==3) { px=(n&15); tgt[qoff>>>1] |= (px<<(4*(1-qoff&1))); qoff++; }
if(msk==0) for(var i=0; i<n; i++) { tgt[qoff>>>1] |= (px<<(4*(1-qoff&1))); qoff++; }
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++; } }
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++; } }
}
}
UTIF.decode._dmap = { "1":0,"011":1,"000011":2,"0000011":3, "010":-1,"000010":-2,"0000010":-3 };
UTIF.decode._lens = ( function()
{
var addKeys = function(lens, arr, i0, inc) { for(var i=0; i<arr.length; i++) lens[arr[i]] = i0 + i*inc; }
var termW = "00110101,000111,0111,1000,1011,1100,1110,1111,10011,10100,00111,01000,001000,000011,110100,110101," // 15
+ "101010,101011,0100111,0001100,0001000,0010111,0000011,0000100,0101000,0101011,0010011,0100100,0011000,00000010,00000011,00011010," // 31
+ "00011011,00010010,00010011,00010100,00010101,00010110,00010111,00101000,00101001,00101010,00101011,00101100,00101101,00000100,00000101,00001010," // 47
+ "00001011,01010010,01010011,01010100,01010101,00100100,00100101,01011000,01011001,01011010,01011011,01001010,01001011,00110010,00110011,00110100";
var termB = "0000110111,010,11,10,011,0011,0010,00011,000101,000100,0000100,0000101,0000111,00000100,00000111,000011000," // 15
+ "0000010111,0000011000,0000001000,00001100111,00001101000,00001101100,00000110111,00000101000,00000010111,00000011000,000011001010,000011001011,000011001100,000011001101,000001101000,000001101001," // 31
+ "000001101010,000001101011,000011010010,000011010011,000011010100,000011010101,000011010110,000011010111,000001101100,000001101101,000011011010,000011011011,000001010100,000001010101,000001010110,000001010111," // 47
+ "000001100100,000001100101,000001010010,000001010011,000000100100,000000110111,000000111000,000000100111,000000101000,000001011000,000001011001,000000101011,000000101100,000001011010,000001100110,000001100111";
var makeW = "11011,10010,010111,0110111,00110110,00110111,01100100,01100101,01101000,01100111,011001100,011001101,011010010,011010011,011010100,011010101,011010110,"
+ "011010111,011011000,011011001,011011010,011011011,010011000,010011001,010011010,011000,010011011";
var makeB = "0000001111,000011001000,000011001001,000001011011,000000110011,000000110100,000000110101,0000001101100,0000001101101,0000001001010,0000001001011,0000001001100,"
+ "0000001001101,0000001110010,0000001110011,0000001110100,0000001110101,0000001110110,0000001110111,0000001010010,0000001010011,0000001010100,0000001010101,0000001011010,"
+ "0000001011011,0000001100100,0000001100101";
var makeA = "00000001000,00000001100,00000001101,000000010010,000000010011,000000010100,000000010101,000000010110,000000010111,000000011100,000000011101,000000011110,000000011111";
termW = termW.split(","); termB = termB.split(","); makeW = makeW.split(","); makeB = makeB.split(","); makeA = makeA.split(",");
var lensW = {}, lensB = {};
addKeys(lensW, termW, 0, 1); addKeys(lensW, makeW, 64,64); addKeys(lensW, makeA, 1792,64);
addKeys(lensB, termB, 0, 1); addKeys(lensB, makeB, 64,64); addKeys(lensB, makeA, 1792,64);
return [lensW, lensB];
} )();
UTIF.decode._decodeG4 = function(data, off, slen, tgt, toff, w, fo)
{
var U = UTIF.decode, boff=off<<3, len=0, wrd=""; // previous starts with 1
var line=[], pline=[]; for(var i=0; i<w; i++) pline.push(0); pline=U._makeDiff(pline);
var a0=0, a1=0, a2=0, b1=0, b2=0, clr=0;
var y=0, mode="", toRead=0;
var bipl = Math.ceil(w/8)*8;
while((boff>>>3)<off+slen)
{
b1 = U._findDiff(pline, a0+(a0==0?0:1), 1-clr), b2 = U._findDiff(pline, b1, clr); // could be precomputed
var bit =0;
if(fo==1) bit = (data[boff>>>3]>>>(7-(boff&7)))&1;
if(fo==2) bit = (data[boff>>>3]>>>( (boff&7)))&1;
boff++; wrd+=bit;
if(mode=="H")
{
if(U._lens[clr][wrd]!=null)
{
var dl=U._lens[clr][wrd]; wrd=""; len+=dl;
if(dl<64) { U._addNtimes(line,len,clr); a0+=len; clr=1-clr; len=0; toRead--; if(toRead==0) mode=""; }
}
}
else
{
if(wrd=="0001") { wrd=""; U._addNtimes(line,b2-a0,clr); a0=b2; }
if(wrd=="001" ) { wrd=""; mode="H"; toRead=2; }
if(U._dmap[wrd]!=null) { a1 = b1+U._dmap[wrd]; U._addNtimes(line, a1-a0, clr); a0=a1; wrd=""; clr=1-clr; }
}
if(line.length==w && mode=="")
{
U._writeBits(line, tgt, toff*8+y*bipl);
clr=0; y++; a0=0;
pline=U._makeDiff(line); line=[];
}
//if(wrd.length>150) { log(wrd); break; throw "e"; }
}
}
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]; }
UTIF.decode._makeDiff = function(line)
{
var out = []; if(line[0]==1) out.push(0,1);
for(var i=1; i<line.length; i++) if(line[i-1]!=line[i]) out.push(i, line[i]);
out.push(line.length,0,line.length,1); return out;
}
UTIF.decode._decodeG3 = function(data, off, slen, tgt, toff, w, fo)
{
var U = UTIF.decode, boff=off<<3, len=0, wrd="";
var line=[], pline=[]; for(var i=0; i<w; i++) line.push(0);
var a0=0, a1=0, a2=0, b1=0, b2=0, clr=0;
var y=-1, mode="", toRead=0, is1D=false;
var bipl = Math.ceil(w/8)*8;
while((boff>>>3)<off+slen)
{
b1 = U._findDiff(pline, a0+(a0==0?0:1), 1-clr), b2 = U._findDiff(pline, b1, clr); // could be precomputed
var bit =0;
if(fo==1) bit = (data[boff>>>3]>>>(7-(boff&7)))&1;
if(fo==2) bit = (data[boff>>>3]>>>( (boff&7)))&1;
boff++; wrd+=bit;
if(is1D)
{
if(U._lens[clr][wrd]!=null)
{
var dl=U._lens[clr][wrd]; wrd=""; len+=dl;
if(dl<64) { U._addNtimes(line,len,clr); clr=1-clr; len=0; }
}
}
else
{
if(mode=="H")
{
if(U._lens[clr][wrd]!=null)
{
var dl=U._lens[clr][wrd]; wrd=""; len+=dl;
if(dl<64) { U._addNtimes(line,len,clr); a0+=len; clr=1-clr; len=0; toRead--; if(toRead==0) mode=""; }
}
}
else
{
if(wrd=="0001") { wrd=""; U._addNtimes(line,b2-a0,clr); a0=b2; }
if(wrd=="001" ) { wrd=""; mode="H"; toRead=2; }
if(U._dmap[wrd]!=null) { a1 = b1+U._dmap[wrd]; U._addNtimes(line, a1-a0, clr); a0=a1; wrd=""; clr=1-clr; }
}
}
if(wrd.endsWith("000000000001")) // needed for some files
{
if(y>=0) U._writeBits(line, tgt, toff*8+y*bipl);
if(fo==1) is1D = ((data[boff>>>3]>>>(7-(boff&7)))&1)==1;
if(fo==2) is1D = ((data[boff>>>3]>>>( (boff&7)))&1)==1;
boff++;
if(U._decodeG3.allow2D==null) U._decodeG3.allow2D=is1D;
if(!U._decodeG3.allow2D) { is1D = true; boff--; }
//log("EOL",y, "next 1D:", is1D);
wrd=""; clr=0; y++; a0=0;
pline=U._makeDiff(line); line=[];
}
}
if(line.length==w) U._writeBits(line, tgt, toff*8+y*bipl);
}
UTIF.decode._addNtimes = function(arr, n, val) { for(var i=0; i<n; i++) arr.push(val); }
UTIF.decode._writeBits = function(bits, tgt, boff)
{
for(var i=0; i<bits.length; i++) tgt[(boff+i)>>>3] |= (bits[i]<<(7-((boff+i)&7)));
}
UTIF.decode._decodeLZW = function(data, off, tgt, toff)
{
if(UTIF.decode._lzwTab==null)
{
var tb=new Uint32Array(0xffff), tn=new Uint16Array(0xffff), chr=new Uint8Array(2e6);
for(var i=0; i<256; i++) { chr[i<<2]=i; tb[i]=i<<2; tn[i]=1; }
UTIF.decode._lzwTab = [tb,tn,chr];
}
var copy = UTIF.decode._copyData;
var tab = UTIF.decode._lzwTab[0], tln=UTIF.decode._lzwTab[1], chr=UTIF.decode._lzwTab[2], totl = 258, chrl = 258<<2;
var bits = 9, boff = off<<3; // offset in bits
var ClearCode = 256, EoiCode = 257;
var v = 0, Code = 0, OldCode = 0;
while(true)
{
v = (data[boff>>>3]<<16) | (data[(boff+8)>>>3]<<8) | data[(boff+16)>>>3];
Code = ( v>>(24-(boff&7)-bits) ) & ((1<<bits)-1); boff+=bits;
if(Code==EoiCode) break;
if(Code==ClearCode)
{
bits=9; totl = 258; chrl = 258<<2;
v = (data[boff>>>3]<<16) | (data[(boff+8)>>>3]<<8) | data[(boff+16)>>>3];
Code = ( v>>(24-(boff&7)-bits) ) & ((1<<bits)-1); boff+=bits;
if(Code==EoiCode) break;
tgt[toff]=Code; toff++;
}
else if(Code<totl)
{
var cd = tab[Code], cl = tln[Code];
copy(chr,cd,tgt,toff,cl); toff += cl;
if(OldCode>=totl) { tab[totl] = chrl; chr[tab[totl]] = cd[0]; tln[totl]=1; chrl=(chrl+1+3)&~0x03; totl++; }
else
{
tab[totl] = chrl;
var nit = tab[OldCode], nil = tln[OldCode];
copy(chr,nit,chr,chrl,nil);
chr[chrl+nil]=chr[cd]; nil++;
tln[totl]=nil; totl++;
chrl=(chrl+nil+3)&~0x03;
}
if(totl+1==(1<<bits)) bits++;
}
else
{
if(OldCode>=totl) { tab[totl] = chrl; tln[totl]=0; totl++; }
else
{
tab[totl] = chrl;
var nit = tab[OldCode], nil = tln[OldCode];
copy(chr,nit,chr,chrl,nil);
chr[chrl+nil]=chr[chrl]; nil++;
tln[totl]=nil; totl++;
copy(chr,chrl,tgt,toff,nil); toff += nil;
chrl=(chrl+nil+3)&~0x03;
}
if(totl+1==(1<<bits)) bits++;
}
OldCode = Code;
}
}
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]; } }
UTIF.tags = {254:"NewSubfileType",255:"SubfileType",256:"ImageWidth",257:"ImageLength",258:"BitsPerSample",259:"Compression",262:"PhotometricInterpretation",266:"FillOrder",
269:"DocumentName",270:"ImageDescription",271:"Make",272:"Model",273:"StripOffset",274:"Orientation",277:"SamplesPerPixel",278:"RowsPerStrip",
279:"StripByteCounts",280:"MinSampleValue",281:"MaxSampleValue",282:"XResolution",283:"YResolution",284:"PlanarConfiguration",285:"PageName",
286:"XPosition",287:"YPosition",
292:"T4Options",296:"ResolutionUnit",297:"PageNumber",305:"Software",306:"DateTime",
315:"Artist",316:"HostComputer",317:"Predictor",318:"WhitePoint",319:"PrimaryChromaticities",320:"ColorMap",
321:"HalftoneHints",322:"TileWidth",
323:"TileLength",324:"TileOffset",325:"TileByteCounts",330:"SubIFDs",336:"DotRange",338:"ExtraSample",339:"SampleFormat", 347:"JPEGTables",
512:"JPEGProc",513:"JPEGInterchangeFormat",514:"JPEGInterchangeFormatLength",519:"JPEGQTables",520:"JPEGDCTables",521:"JPEGACTables",
529:"YCbCrCoefficients",530:"YCbCrSubSampling",531:"YCbCrPositioning",532:"ReferenceBlackWhite",700:"XMP",
33421:"CFARepeatPatternDim",33422:"CFAPattern",33432:"Copyright",33434:"ExposureTime",33437:"FNumber",33723:"IPTC/NAA",34377:"Photoshop",
34665:"ExifIFD",34675:"ICC Profile",34850:"ExposureProgram",34853:"GPSInfo",34855:"ISOSpeedRatings",34858:"TimeZoneOffset",34859:"SelfTimeMode",
36867:"DateTimeOriginal",36868:"DateTimeDigitized",
37377:"ShutterSpeedValue",37378:"ApertureValue",37380:"ExposureBiasValue",37383:"MeteringMode",37385:"Flash",37386:"FocalLength",
37390:"FocalPlaneXResolution",37391:"FocalPlaneYResolution",37392:"FocalPlaneResolutionUnit",37393:"ImageNumber",37398:"TIFF/EPStandardID",37399:"SensingMethod",
37500:"MakerNote",37510:"UserComment",37724:"ImageSourceData",
40092:"XPComment",40094:"XPKeywords",
40961:"ColorSpace",40962:"PixelXDimension",40963:"PixelXDimension",41486:"FocalPlaneXResolution",41487:"FocalPlaneYResolution",41488:"FocalPlaneResolutionUnit",
41985:"CustomRendered",41986:"ExposureMode",41987:"WhiteBalance",41990:"SceneCaptureType",
50706:"DNGVersion",50707:"DNGBackwardVersion",50708:"UniqueCameraModel",50709:"LocalizedCameraModel",50710:"CFAPlaneColor",
50711:"CFALayout",50712:"LinearizationTable",50713:"BlackLevelRepeatDim",50714:"BlackLevel",50716:"BlackLevelDeltaV",50717:"WhiteLevel",
50718:"DefaultScale",50719:"DefaultCropOrigin",
50720:"DefaultCropSize",50733:"BayerGreenSplit",50738:"AntiAliasStrength",
50721:"ColorMatrix1",50722:"ColorMatrix2",50723:"CameraCalibration1",50724:"CameraCalibration2",50727:"AnalogBalance",50728:"AsShotNeutral",
50730:"BaselineExposure",50731:"BaselineNoise",50732:"BaselineSharpness",50734:"LinearResponseLimit",50735:"CameraSerialNumber",50736:"LensInfo",50739:"ShadowScale",
50740:"DNGPrivateData",50741:"MakerNoteSafety",50778:"CalibrationIlluminant1",50779:"CalibrationIlluminant2",50780:"BestQualityScale",
50781:"RawDataUniqueID",50827:"OriginalRawFileName",50829:"ActiveArea",50830:"MaskedAreas",50931:"CameraCalibrationSignature",50932:"ProfileCalibrationSignature",
50935:"NoiseReductionApplied",50936:"ProfileName",50937:"ProfileHueSatMapDims",50938:"ProfileHueSatMapData1",50939:"ProfileHueSatMapData2",
50940:"ProfileToneCurve",50941:"ProfileEmbedPolicy",50942:"ProfileCopyright",
50964:"ForwardMatrix1",50965:"ForwardMatrix2",50966:"PreviewApplicationName",50967:"PreviewApplicationVersion",50969:"PreviewSettingsDigest",
50970:"PreviewColorSpace",50971:"PreviewDateTime",50972:"RawImageDigest",
51008:"OpcodeList1",51009:"OpcodeList2",51022:"OpcodeList3",51041:"NoiseProfile",51089:"OriginalDefaultFinalSize",
51090:"OriginalBestQualityFinalSize",51091:"OriginalDefaultCropSize",51125:"DefaultUserCrop"};
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 };
UTIF._readIFD = function(bin, data, offset, ifds)
{
var cnt = bin.readUshort(data, offset); offset+=2;
var ifd = {}; ifds.push(ifd);
//log(">>>----------------");
for(var i=0; i<cnt; i++)
{
var tag = bin.readUshort(data, offset); offset+=2;
var type = bin.readUshort(data, offset); offset+=2;
var num = bin.readUint (data, offset); offset+=4;
var voff = bin.readUint (data, offset); offset+=4;
var arr = [];
ifd["t"+tag] = arr;
//ifd["t"+tag+"-"+UTIF.tags[tag]] = arr;
if(type== 1 || type==7) { for(var j=0; j<num; j++) arr.push(data[(num<5 ? offset-4 : voff)+j]); }
if(type== 2) { arr.push( bin.readASCII(data, (num<5 ? offset-4 : voff), num-1) ); }
if(type== 3) { for(var j=0; j<num; j++) arr.push(bin.readUshort(data, (num<3 ? offset-4 : voff)+2*j)); }
if(type== 4) { for(var j=0; j<num; j++) arr.push(bin.readUint (data, (num<2 ? offset-4 : voff)+4*j)); }
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)); }
if(type== 8) { for(var j=0; j<num; j++) arr.push(bin.readShort (data, (num<3 ? offset-4 : voff)+2*j)); }
if(type== 9) { for(var j=0; j<num; j++) arr.push(bin.readInt (data, (num<2 ? offset-4 : voff)+4*j)); }
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)); }
if(type==11) { for(var j=0; j<num; j++) arr.push(bin.readFloat (data, voff+j*4)); }
if(type==12) { for(var j=0; j<num; j++) arr.push(bin.readDouble(data, voff+j*8)); }
if(num!=0 && arr.length==0) log("unknown TIFF tag type: ", type, "num:",num);
//log(tag, type, UTIF.tags[tag], arr);
if(tag==330) for(var j=0; j<num; j++) UTIF._readIFD(bin, data, arr[j], ifds);
//if(tag==34665) UTIF._readIFD(bin, data, arr[0], ifds);
}
//log("<<<---------------");
return offset;
}
UTIF._writeIFD = function(bin, data, offset, ifd)
{
var keys = Object.keys(ifd);
bin.writeUshort(data, offset, keys.length); offset+=2;
var eoff = offset + keys.length*12 + 4;
for(var ki=0; ki<keys.length; ki++)
{
var key = keys[ki];
var tag = parseInt(key.slice(1)), type = UTIF.ttypes[tag]; if(type==null) throw new Error("unknown type of tag: "+tag);
var val = ifd[key]; if(type==2) val=val[0]+"\u0000"; var num = val.length;
bin.writeUshort(data, offset, tag ); offset+=2;
bin.writeUshort(data, offset, type); offset+=2;
bin.writeUint (data, offset, num ); offset+=4;
var dlen = [-1, 1, 1, 2, 4, 8, 0, 0, 0, 0, 0, 0, 8][type] * num;
var toff = offset;
if(dlen>4) { bin.writeUint(data, offset, eoff); toff=eoff; }
if(type==2) { bin.writeASCII(data, toff, val); }
if(type==3) { for(var i=0; i<num; i++) bin.writeUshort(data, toff+2*i, val[i]); }
if(type==4) { for(var i=0; i<num; i++) bin.writeUint (data, toff+4*i, val[i]); }
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); } }
if (type == 12) { for (var i = 0; i < num; i++) bin.writeDouble(data, toff + 8 * i, val[i]); }
if(dlen>4) { dlen += (dlen&1); eoff += dlen; }
offset += 4;
}
return [offset, eoff];
}
UTIF.toRGBA8 = function(out)
{
var w = out.width, h = out.height, area = w*h, qarea = area*4, data = out.data;
var img = new Uint8Array(area*4);
// 0: WhiteIsZero, 1: BlackIsZero, 2: RGB, 3: Palette color, 4: Transparency mask, 5: CMYK
var intp = out["t262"][0], bps = (out["t258"]?Math.min(32,out["t258"][0]):1), isLE = out.isLE ? 1 : 0;
//log("interpretation: ", intp, "bps", bps, out);
if(false) {}
else if(intp==0)
{
var bpl = Math.ceil(bps*w/8);
for(var y=0; y<h; y++) {
var off = y*bpl, io = y*w;
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; }
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; }
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; }
}
}
else if(intp==1)
{
var bpl = Math.ceil(bps*w/8);
for(var y=0; y<h; y++) {
var off = y*bpl, io = y*w;
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; }
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; }
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; }
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
}
}
else if(intp==2)
{
if(bps== 8) // this needs to be simplified ... how many channels are there???
{
if(out["t338"])
{
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
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; }
}
else
{
var smpls = out["t258"]?out["t258"].length : 3;
if(smpls==4) for(var i=0; i<qarea; i++) img[i] = data[i];
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; }
}
}
else // 3x 16-bit channel
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; }
}
else if(intp==3)
{
var map = out["t320"];
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; }
}
else if(intp==5)
{
var smpls = out["t258"]?out["t258"].length : 4;
var gotAlpha = smpls>4 ? 1 : 0;
for(var i=0; i<area; i++) {
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);
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;
}
}
else log("Unknown Photometric interpretation: "+intp);
return img;
}
UTIF.replaceIMG = function()
{
var imgs = document.getElementsByTagName("img");
for (var i=0; i<imgs.length; i++)
{
var img=imgs[i], src=img.getAttribute("src"); if(src==null) continue;
var suff=src.split(".").pop().toLowerCase();
if(suff!="tif" && suff!="tiff") continue;
var xhr = new XMLHttpRequest(); UTIF._xhrs.push(xhr); UTIF._imgs.push(img);
xhr.open("GET", src); xhr.responseType = "arraybuffer";
xhr.onload = UTIF._imgLoaded; xhr.send();
}
}
UTIF._xhrs = []; UTIF._imgs = [];
UTIF._imgLoaded = function(e)
{
var buff = e.target.response;
var ifds = UTIF.decode(buff), page = ifds[0]; UTIF.decodeImages(buff, ifds);
var rgba = UTIF.toRGBA8(page), w=page.width, h=page.height;
var ind = UTIF._xhrs.indexOf(e.target), img = UTIF._imgs[ind];
UTIF._xhrs.splice(ind,1); UTIF._imgs.splice(ind,1);
var cnv = document.createElement("canvas"); cnv.width=w; cnv.height=h;
var ctx = cnv.getContext("2d"), imgd = ctx.createImageData(w,h);
for(var i=0; i<rgba.length; i++) imgd.data[i]=rgba[i]; ctx.putImageData(imgd,0,0);
var attr = ["style","class","id"];
for(var i=0; i<attr.length; i++) cnv.setAttribute(attr[i], img.getAttribute(attr[i]));
img.parentNode.replaceChild(cnv,img);
}
UTIF._binBE =
{
nextZero : function(data, o) { while(data[o]!=0) o++; return o; },
readUshort : function(buff, p) { return (buff[p]<< 8) | buff[p+1]; },
readShort : function(buff, p) { var a=UTIF._binBE.ui8; a[0]=buff[p+1]; a[1]=buff[p+0]; return UTIF._binBE. i16[0]; },
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]; },
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]; },
readASCII : function(buff, p, l) { var s = ""; for(var i=0; i<l; i++) s += String.fromCharCode(buff[p+i]); return s; },
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]; },
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]; },
writeUshort: function(buff, p, n) { buff[p] = (n>> 8)&255; buff[p+1] = n&255; },
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; },
writeASCII : function(buff, p, s) { for(var i = 0; i < s.length; i++) buff[p+i] = s.charCodeAt(i); },
writeDouble: function(buff, p, n)
{
UTIF._binBE.fl64[0] = n;
for (var i = 0; i < 8; i++) buff[p + i] = UTIF._binBE.ui8[7 - i];
}
}
UTIF._binBE.ui8 = new Uint8Array (8);
UTIF._binBE.i16 = new Int16Array (UTIF._binBE.ui8.buffer);
UTIF._binBE.i32 = new Int32Array (UTIF._binBE.ui8.buffer);
UTIF._binBE.ui32 = new Uint32Array (UTIF._binBE.ui8.buffer);
UTIF._binBE.fl32 = new Float32Array(UTIF._binBE.ui8.buffer);
UTIF._binBE.fl64 = new Float64Array(UTIF._binBE.ui8.buffer);
UTIF._binLE =
{
nextZero : UTIF._binBE.nextZero,
readUshort : function(buff, p) { return (buff[p+1]<< 8) | buff[p]; },
readShort : function(buff, p) { var a=UTIF._binBE.ui8; a[0]=buff[p+0]; a[1]=buff[p+1]; return UTIF._binBE. i16[0]; },
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]; },
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]; },
readASCII : UTIF._binBE.readASCII,
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]; },
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]; }
}
UTIF._copyTile = function(tb, tw, th, b, w, h, xoff, yoff)
{
//log("copyTile", tw, th, w, h, xoff, yoff);
var xlim = Math.min(tw, w-xoff);
var ylim = Math.min(th, h-yoff);
for(var y=0; y<ylim; y++)
{
var tof = (yoff+y)*w+xoff;
var sof = y*tw;
for(var x=0; x<xlim; x++) b[tof+x] = tb[sof+x];
}
}
})(UTIF, pako);
})();

24
node_modules/utif/package.json generated vendored Normal file
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@@ -0,0 +1,24 @@
{
"name": "utif",
"description": "Fast and advanced TIFF decoder",
"version": "2.0.1",
"homepage": "https://github.com/photopea/UTIF.js",
"author": "photopea (https://github.com/photopea)",
"contributors": [
"Scimonster (https://github.com/Scimonster)"
],
"license": "MIT",
"repository": "github:photopea/UTIF.js",
"bugs": {
"url": "https://github.com/photopea/UTIF.js/issues"
},
"main": "UTIF",
"keywords": [
"tiff",
"image",
"conversion"
],
"dependencies": {
"pako": "^1.0.5"
}
}