universalviewer
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The Universal Viewer is an open source project to enable cultural heritage institutions to present their digital artifacts in an IIIF-compliant and highly customisable user interface.
94 lines • 492 kB
JavaScript
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na.prototype={getRgb:function(a,b){var c=new Uint8Array(3);this.getRgbItem(a,b,c,0);return c},getRgbItem:function(){u("Should not call ColorSpace.getRgbItem")},getRgbBuffer:function(){u("Should not call ColorSpace.getRgbBuffer")},getOutputLength:function(){u("Should not call ColorSpace.getOutputLength")},isPassthrough:function(){return!1},fillRgb:function(a,b,c,d,e,f,g,h,j){var l=b*c,k=null,m=1<<g,n=c!=e||b!=d,p;if(this.isPassthrough(g))k=h;else if(1===this.numComps&&l>m&&"DeviceGray"!==this.name&&
"DeviceRGB"!==this.name){var q=8>=g?new Uint8Array(m):new Uint16Array(m),s;for(p=0;p<m;p++)q[p]=p;var v=new Uint8Array(3*m);this.getRgbBuffer(q,0,m,v,0,g,0);if(n){k=new Uint8Array(3*l);for(p=q=0;p<l;++p)s=3*h[p],k[q++]=v[s],k[q++]=v[s+1],k[q++]=v[s+2]}else for(p=m=0;p<l;++p)s=3*h[p],a[m++]=v[s],a[m++]=v[s+1],a[m++]=v[s+2],m+=j}else n?(k=new Uint8Array(3*l),this.getRgbBuffer(h,0,l,k,0,g,0)):this.getRgbBuffer(h,0,d*f,a,0,g,j);if(k)if(n)Zb.resize(k,g,3,b,c,d,e,a,j);else{p=m=q=0;for(b=d*f;p<b;p++)a[m++]=
k[q++],a[m++]=k[q++],a[m++]=k[q++],m+=j}},usesZeroToOneRange:!0};na.parse=function(a,b,c){a=na.parseToIR(a,b,c);return a instanceof Fd?a:na.fromIR(a)};na.fromIR=function(a){var b=I(a)?a[0]:a,c;switch(b){case "DeviceGrayCS":return this.singletons.gray;case "DeviceRgbCS":return this.singletons.rgb;case "DeviceCmykCS":return this.singletons.cmyk;case "CalGrayCS":return b=a[1].WhitePoint,c=a[1].BlackPoint,new Ee(b,c,a[1].Gamma);case "PatternCS":return(a=a[1])&&(a=na.fromIR(a)),new Fe(a);case "IndexedCS":return b=
a[2],c=a[3],new Ge(na.fromIR(a[1]),b,c);case "AlternateCS":return b=a[3],new Fd(a[1],na.fromIR(a[2]),eb.fromIR(b));case "LabCS":return b=a[1].WhitePoint,c=a[1].BlackPoint,new He(b,c,a[1].Range);default:u("Unkown name "+b)}return null};na.parseToIR=function(a,b,c){if(D(a)){var d=c.get("ColorSpace");G(d)&&(d=d.get(a.name))&&(a=d)}a=b.fetchIfRef(a);if(D(a))switch(this.mode=d=a.name,d){case "DeviceGray":case "G":return"DeviceGrayCS";case "DeviceRGB":case "RGB":return"DeviceRgbCS";case "DeviceCMYK":case "CMYK":return"DeviceCmykCS";
case "Pattern":return["PatternCS",null];default:u("unrecognized colorspace "+d)}else if(I(a))switch(this.mode=d=a[0].name,d){case "DeviceGray":case "G":return"DeviceGrayCS";case "DeviceRGB":case "RGB":return"DeviceRgbCS";case "DeviceCMYK":case "CMYK":return"DeviceCmykCS";case "CalGray":return b=a[1].getAll(),["CalGrayCS",b];case "CalRGB":return"DeviceRgbCS";case "ICCBased":d=b.fetchIfRef(a[1]).dict.get("N");if(1==d)return"DeviceGrayCS";if(3==d)return"DeviceRgbCS";if(4==d)return"DeviceCmykCS";break;
case "Pattern":return(a=a[1])&&(a=na.parseToIR(a,b,c)),["PatternCS",a];case "Indexed":case "I":return c=na.parseToIR(a[1],b,c),d=a[2]+1,b=b.fetchIfRef(a[3]),V(b)&&(b=b.getBytes()),["IndexedCS",c,d,b];case "Separation":case "DeviceN":var e=a[1],d=1;D(e)?d=1:I(e)&&(d=e.length);c=na.parseToIR(a[2],b,c);b=eb.getIR(b,b.fetchIfRef(a[3]));return["AlternateCS",d,c,b];case "Lab":return b=a[1].getAll(),["LabCS",b];default:u('unimplemented color space object "'+d+'"')}else u('unrecognized color space object: "'+
a+'"');return null};na.isDefaultDecode=function(a,b){if(!a)return!0;if(2*b!==a.length)return L("The decode map is not the correct length"),!0;for(var c=0,d=a.length;c<d;c+=2)if(0!==a[c]||1!=a[c+1])return!1;return!0};na.singletons={get gray(){return K(this,"gray",new Ie)},get rgb(){return K(this,"rgb",new Je)},get cmyk(){return K(this,"cmyk",new Ke)}};U=na;var Fd,Le=function(a,b,c){this.name="Alternate";this.numComps=a;this.defaultColor=new Float32Array(a);for(var d=0;d<a;++d)this.defaultColor[d]=
1;this.base=b;this.tintFn=c};Le.prototype={getRgb:U.prototype.getRgb,getRgbItem:function(a,b,c,d){a="subarray"in a?a.subarray(b,b+this.numComps):Array.prototype.slice.call(a,b,b+this.numComps);a=this.tintFn(a);this.base.getRgbItem(a,0,c,d)},getRgbBuffer:function(a,b,c,d,e,f,g){var h=this.tintFn,j=this.base;f=1/((1<<f)-1);var l=j.numComps,k=j.usesZeroToOneRange,m=(j.isPassthrough(8)||!k)&&0===g,n=m?e:0,p=m?d:new Uint8Array(l*c),q=this.numComps,s=new Float32Array(q),v,t;for(v=0;v<c;v++){for(t=0;t<q;t++)s[t]=
a[b++]*f;var u=h(s);if(k)for(t=0;t<l;t++)p[n++]=255*u[t];else j.getRgbItem(u,0,p,n),n+=l}m||j.getRgbBuffer(p,0,c,d,e,8,g)},getOutputLength:function(a,b){return this.base.getOutputLength(a*this.base.numComps/this.numComps,b)},isPassthrough:U.prototype.isPassthrough,fillRgb:U.prototype.fillRgb,isDefaultDecode:function(a){return U.isDefaultDecode(a,this.numComps)},usesZeroToOneRange:!0};Fd=Le;var Fe,Me=function(a){this.name="Pattern";this.base=a};Me.prototype={};Fe=Me;var Ge,Ne=function(a,b,c){this.name=
"Indexed";this.numComps=1;this.defaultColor=new Uint8Array([0]);this.base=a;this.highVal=b;a=a.numComps*b;var d;if(V(c))d=new Uint8Array(a),c=c.getBytes(a),d.set(c);else if(oa(c)){d=new Uint8Array(a);for(b=0;b<a;++b)d[b]=c.charCodeAt(b)}else c instanceof Uint8Array||c instanceof Array?d=c:u("Unrecognized lookup table: "+c);this.lookup=d};Ne.prototype={getRgb:U.prototype.getRgb,getRgbItem:function(a,b,c,d){this.base.getRgbItem(this.lookup,a[b]*this.base.numComps,c,d)},getRgbBuffer:function(a,b,c,d,
e,f,g){f=this.base;for(var h=f.numComps,j=f.getOutputLength(h,g),l=this.lookup,k=0;k<c;++k){var m=a[b++]*h;f.getRgbBuffer(l,m,1,d,e,8,g);e+=j}},getOutputLength:function(a,b){return this.base.getOutputLength(a*this.base.numComps,b)},isPassthrough:U.prototype.isPassthrough,fillRgb:U.prototype.fillRgb,isDefaultDecode:function(){return!0},usesZeroToOneRange:!0};Ge=Ne;var Ie,Oe=function(){this.name="DeviceGray";this.numComps=1;this.defaultColor=new Float32Array([0])};Oe.prototype={getRgb:U.prototype.getRgb,
getRgbItem:function(a,b,c,d){a=255*a[b]|0;c[d]=c[d+1]=c[d+2]=0>a?0:255<a?255:a},getRgbBuffer:function(a,b,c,d,e,f,g){f=255/((1<<f)-1);for(var h=0;h<c;++h){var j=f*a[b++]|0;d[e++]=j;d[e++]=j;d[e++]=j;e+=g}},getOutputLength:function(a,b){return a*(3+b)},isPassthrough:U.prototype.isPassthrough,fillRgb:U.prototype.fillRgb,isDefaultDecode:function(a){return U.isDefaultDecode(a,this.numComps)},usesZeroToOneRange:!0};Ie=Oe;var Je,Pe=function(){this.name="DeviceRGB";this.numComps=3;this.defaultColor=new Float32Array([0,
0,0])};Pe.prototype={getRgb:U.prototype.getRgb,getRgbItem:function(a,b,c,d){var e=255*a[b]|0,f=255*a[b+1]|0;a=255*a[b+2]|0;c[d]=0>e?0:255<e?255:e;c[d+1]=0>f?0:255<f?255:f;c[d+2]=0>a?0:255<a?255:a},getRgbBuffer:function(a,b,c,d,e,f,g){if(8===f&&0===g)d.set(a.subarray(b,b+3*c),e);else{f=255/((1<<f)-1);for(var h=0;h<c;++h)d[e++]=f*a[b++]|0,d[e++]=f*a[b++]|0,d[e++]=f*a[b++]|0,e+=g}},getOutputLength:function(a,b){return a*(3+b)/3|0},isPassthrough:function(a){return 8==a},fillRgb:U.prototype.fillRgb,isDefaultDecode:function(a){return U.isDefaultDecode(a,
this.numComps)},usesZeroToOneRange:!0};Je=Pe;var Ke,Qe=function(a,b,c,d,e){var f=a[b+0]*c,g=a[b+1]*c,h=a[b+2]*c;c*=a[b+3];a=f*(-4.387332384609988*f+54.48615194189176*g+18.82290502165302*h+212.25662451639585*c+-285.2331026137004)+g*(1.7149763477362134*g-5.6096736904047315*h+-17.873870861415444*c-5.497006427196366)+h*(-2.5217340131683033*h-21.248923337353073*c+17.5119270841813)+c*(-21.86122147463605*c-189.48180835922747)+255|0;b=f*(8.841041422036149*f+60.118027045597366*g+6.871425592049007*h+31.159100130055922*
c+-79.2970844816548)+g*(-15.310361306967817*g+17.575251261109482*h+131.35250912493976*c-190.9453302588951)+h*(4.444339102852739*h+9.8632861493405*c-24.86741582555878)+c*(-20.737325471181034*c-187.80453709719578)+255|0;f=f*(0.8842522430003296*f+8.078677503112928*g+30.89978309703729*h-0.23883238689178934*c+-14.183576799673286)+g*(10.49593273432072*g+63.02378494754052*h+50.606957656360734*c-112.23884253719248)+h*(0.03296041114873217*h+115.60384449646641*c+-193.58209356861505)+c*(-22.33816807309886*c-
180.12613974708367)+255|0;d[e]=255<a?255:0>a?0:a;d[e+1]=255<b?255:0>b?0:b;d[e+2]=255<f?255:0>f?0:f},Re=function(){this.name="DeviceCMYK";this.numComps=4;this.defaultColor=new Float32Array([0,0,0,1])};Re.prototype={getRgb:U.prototype.getRgb,getRgbItem:function(a,b,c,d){Qe(a,b,1,c,d)},getRgbBuffer:function(a,b,c,d,e,f,g){f=1/((1<<f)-1);for(var h=0;h<c;h++)Qe(a,b,f,d,e),b+=4,e+=3+g},getOutputLength:function(a,b){return a/4*(3+b)|0},isPassthrough:U.prototype.isPassthrough,fillRgb:U.prototype.fillRgb,
isDefaultDecode:function(a){return U.isDefaultDecode(a,this.numComps)},usesZeroToOneRange:!0};Ke=Re;var Ee,Se=function(a,b,c){this.name="CalGray";this.numComps=1;this.defaultColor=new Float32Array([0]);a||u("WhitePoint missing - required for color space CalGray");b=b||[0,0,0];this.XW=a[0];this.YW=a[1];this.ZW=a[2];this.XB=b[0];this.YB=b[1];this.ZB=b[2];this.G=c||1;(0>this.XW||0>this.ZW||1!==this.YW)&&u("Invalid WhitePoint components for "+this.name+", no fallback available");if(0>this.XB||0>this.YB||
0>this.ZB)R("Invalid BlackPoint for "+this.name+", falling back to default"),this.XB=this.YB=this.ZB=0;(0!==this.XB||0!==this.YB||0!==this.ZB)&&L(this.name+", BlackPoint: XB: "+this.XB+", YB: "+this.YB+", ZB: "+this.ZB+", only default values are supported.");1>this.G&&(R("Invalid Gamma: "+this.G+" for "+this.name+", falling back to default"),this.G=1)},Te=function(a,b,c,d,e,f){b=Math.pow(b[c]*f,a.G);a=Math.max(116*Math.pow(a.YW*b,1/3)-16,0);d[e]=255*a/100;d[e+1]=255*a/100;d[e+2]=255*a/100};Se.prototype=
{getRgb:U.prototype.getRgb,getRgbItem:function(a,b,c,d){Te(this,a,b,c,d,1)},getRgbBuffer:function(a,b,c,d,e,f,g){f=1/((1<<f)-1);for(var h=0;h<c;++h)Te(this,a,b,d,e,f),b+=1,e+=3+g},getOutputLength:function(a,b){return a*(3+b)},isPassthrough:U.prototype.isPassthrough,fillRgb:U.prototype.fillRgb,isDefaultDecode:function(a){return U.isDefaultDecode(a,this.numComps)},usesZeroToOneRange:!0};Ee=Se;var He,Ue=function(a,b,c){this.name="Lab";this.numComps=3;this.defaultColor=new Float32Array([0,0,0]);a||u("WhitePoint missing - required for color space Lab");
b=b||[0,0,0];c=c||[-100,100,-100,100];this.XW=a[0];this.YW=a[1];this.ZW=a[2];this.amin=c[0];this.amax=c[1];this.bmin=c[2];this.bmax=c[3];this.XB=b[0];this.YB=b[1];this.ZB=b[2];(0>this.XW||0>this.ZW||1!==this.YW)&&u("Invalid WhitePoint components, no fallback available");if(0>this.XB||0>this.YB||0>this.ZB)R("Invalid BlackPoint, falling back to default"),this.XB=this.YB=this.ZB=0;if(this.amin>this.amax||this.bmin>this.bmax)R("Invalid Range, falling back to defaults"),this.amin=-100,this.amax=100,this.bmin=
-100,this.bmax=100},Gd=function(a){return a>=6/29?a*a*a:108/841*(a-4/29)},Ve=function(a,b,c,d,e,f){var g=b[c],h=b[c+1];b=b[c+2];!1!==d&&(g=0+100*g/d,h=a.amin+h*(a.amax-a.amin)/d,b=a.bmin+b*(a.bmax-a.bmin)/d);h=h>a.amax?a.amax:h<a.amin?a.amin:h;b=b>a.bmax?a.bmax:b<a.bmin?a.bmin:b;d=(g+16)/116;g=d-b/200;h=a.XW*Gd(d+h/500);d=a.YW*Gd(d);g=a.ZW*Gd(g);1>a.ZW?(a=3.1339*h+-1.617*d+-0.4906*g,b=-0.9785*h+1.916*d+0.0333*g,h=0.072*h+-0.229*d+1.4057*g):(a=3.2406*h+-1.5372*d+-0.4986*g,b=-0.9689*h+1.8758*d+0.0415*
g,h=0.0557*h+-0.204*d+1.057*g);e[f]=0>=a?0:1<=a?255:255*Math.sqrt(a)|0;e[f+1]=0>=b?0:1<=b?255:255*Math.sqrt(b)|0;e[f+2]=0>=h?0:1<=h?255:255*Math.sqrt(h)|0};Ue.prototype={getRgb:U.prototype.getRgb,getRgbItem:function(a,b,c,d){Ve(this,a,b,!1,c,d)},getRgbBuffer:function(a,b,c,d,e,f,g){f=(1<<f)-1;for(var h=0;h<c;h++)Ve(this,a,b,f,d,e),b+=3,e+=3+g},getOutputLength:function(a,b){return a*(3+b)/3|0},isPassthrough:U.prototype.isPassthrough,isDefaultDecode:function(){return!0},usesZeroToOneRange:!1};He=Ue;
var eb;eb={getSampleArray:function(a,b,c,d){var e,f,g=1;e=0;for(f=a.length;e<f;e++)g*=a[e];g*=b;a=[];f=b=0;var h=1/(Math.pow(2,c)-1);d=d.getBytes((g*c+7)/8);var j=0;for(e=0;e<g;e++){for(;b<c;)f<<=8,f|=d[j++],b+=8;b-=c;a.push((f>>b)*h);f&=(1<<b)-1}return a},getIR:function(a,b){var c=b.dict;c||(c=b);var d=[this.constructSampled,null,this.constructInterpolated,this.constructStiched,this.constructPostScript],e=c.get("FunctionType");(d=d[e])||u("Unknown type of function");return d.call(this,b,c,a)},fromIR:function(a){switch(a[0]){case 0:return this.constructSampledFromIR(a);
case 2:return this.constructInterpolatedFromIR(a);case 3:return this.constructStichedFromIR(a);default:return this.constructPostScriptFromIR(a)}},parse:function(a,b){var c=this.getIR(a,b);return this.fromIR(c)},constructSampled:function(a,b){function c(a){for(var b=a.length,c=[],d=0,e=0;e<b;e+=2)c[d]=[a[e],a[e+1]],++d;return c}var d=b.get("Domain"),e=b.get("Range");(!d||!e)&&u("No domain or range");var f=d.length/2,g=e.length/2,d=c(d),e=c(e),h=b.get("Size"),j=b.get("BitsPerSample"),l=b.get("Order")||
1;1!==l&&R("No support for cubic spline interpolation: "+l);l=b.get("Encode");if(!l)for(var l=[],k=0;k<f;++k)l.push(0),l.push(h[k]-1);var l=c(l),k=(k=b.get("Decode"))?c(k):e,m=this.getSampleArray(h,g,j,a);return[0,f,d,l,k,m,h,g,Math.pow(2,j)-1,e]},constructSampledFromIR:function(a){return function(b){var c=a[1],d=a[2],e=a[3],f=a[4],g=a[5],h=a[6],j=a[7],l=a[9];c!=b.length&&u("Incorrect number of arguments: "+c+" != "+b.length);var k=1<<c,m=new Float64Array(k),n=new Uint32Array(k),p,q;for(q=0;q<k;q++)m[q]=
1;var s=j,v=1;for(p=0;p<c;++p){q=d[p][0];var t=d[p][1],r=Math.min(Math.max(b[p],q),t),aa=e[p][0]+(r-q)*((e[p][1]-e[p][0])/(t-q)),t=h[p],aa=Math.min(Math.max(aa,0),t-1);q=aa<t-1?Math.floor(aa):aa-1;var r=q+1-aa,aa=aa-q,N=q*s,ea=N+s;for(q=0;q<k;q++)q&v?(m[q]*=aa,n[q]+=ea):(m[q]*=r,n[q]+=N);s*=t;v<<=1}b=new Float64Array(j);for(q=0;q<j;++q){for(p=c=0;p<k;p++)c+=g[n[p]+q]*m[p];c=f[q][0]+(c-0)*((f[q][1]-f[q][0])/1);b[q]=Math.min(Math.max(c,l[q][0]),l[q][1])}return b}},constructInterpolated:function(a,b){var c=
b.get("C0")||[0],d=b.get("C1")||[1],e=b.get("N");(!I(c)||!I(d))&&u("Illegal dictionary for interpolated function");for(var f=c.length,g=[],h=0;h<f;++h)g.push(d[h]-c[h]);return[2,c,g,e]},constructInterpolatedFromIR:function(a){var b=a[1],c=a[2],d=a[3],e=c.length;return function(a){a=1==d?a[0]:Math.pow(a[0],d);for(var g=[],h=0;h<e;++h)g.push(b[h]+a*c[h]);return g}},constructStiched:function(a,b,c){(a=b.get("Domain"))||u("No domain");1!=a.length/2&&u("Bad domain for stiched function");for(var d=b.get("Functions"),
e=[],f=0,g=d.length;f<g;++f)e.push(eb.getIR(c,c.fetchIfRef(d[f])));c=b.get("Bounds");b=b.get("Encode");return[3,a,c,b,e]},constructStichedFromIR:function(a){var b=a[1],c=a[2],d=a[3];a=a[4];for(var e=[],f=0,g=a.length;f<g;f++)e.push(eb.fromIR(a[f]));return function(a){a=a[0];var f=b[0],g=b[1];a>g?a=g:a<f&&(a=f);f=0;for(g=c.length;f<g&&!(a<c[f]);++f);g=b[0];0<f&&(g=c[f-1]);var k=b[1];f<c.length&&(k=c[f]);var m=d[2*f];return e[f]([m+(a-g)*(d[2*f+1]-m)/(k-g)])}},constructPostScript:function(a,b){var c=
b.get("Domain"),d=b.get("Range");c||u("No domain.");d||u("No range.");var e=new We(a),e=(new Xe(e)).parse();return[4,c,d,e]},constructPostScriptFromIR:function(a){var b=a[1],c=a[2],d=c.length/2,e=new Ye(a[3]),f=new Ze;return function(a){for(var h=[],j=0,l=b.length/2;j<l;++j)h.push(a[j]);a=h.join("_");if(f.has(a))return f.get(a);h=e.execute(h);l=[];for(j=d-1;0<=j;--j){var k=h.pop(),m=2*j;k<c[m]?k=c[m]:k>c[m+1]&&(k=c[m+1]);l[j]=k}f.set(a,l);return l}}};var Ze,$e=function(){this.cache={};this.total=
0};$e.prototype={has:function(a){return a in this.cache},get:function(a){return this.cache[a]},set:function(a,b){1024>this.total&&(this.cache[a]=b,this.total++)}};Ze=$e;var af=function(a){this.stack=a||[]};af.prototype={push:function(a){100<=this.stack.length&&u("PostScript function stack overflow.");this.stack.push(a)},pop:function(){0>=this.stack.length&&u("PostScript function stack underflow.");return this.stack.pop()},copy:function(a){100<=this.stack.length+a&&u("PostScript function stack overflow.");
var b=this.stack,c=b.length-a;for(a-=1;0<=a;a--,c++)b.push(b[c])},index:function(a){this.push(this.stack[this.stack.length-a-1])},roll:function(a,b){var c=this.stack,d=c.length-a,e=c.length-1,f=d+(b-Math.floor(b/a)*a),g,h,j;g=d;for(h=e;g<h;g++,h--)j=c[g],c[g]=c[h],c[h]=j;g=d;for(h=f-1;g<h;g++,h--)j=c[g],c[g]=c[h],c[h]=j;g=f;for(h=e;g<h;g++,h--)j=c[g],c[g]=c[h],c[h]=j}};var Ye,bf=function(a){this.operators=a};bf.prototype={execute:function(a){a=new af(a);for(var b=0,c=this.operators,d=c.length,e,f;b<
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