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      `+t});var a;return this.size===Infinity||this.size==null?a=this.size:e?a=Math.ceil(this.size/t):a=Math.floor(this.size/t),an(function(){return ce(r,void 0,void 0,function(){return le(this,function(s){switch(s.label){case 0:return[4,i.iterator()];case 1:return[2,s.sent().columnMajorBatch(t,e,R8)]}})})},a)},n.prototype.concatenate=function(t){var e=this,r=this,i;return this.size===Infinity||t.size===Infinity?i=Infinity:this.size!=null&&t.size!=null?i=this.size+t.size:i=null,an(function(){return ce(e,void 0,void 0,function(){var a,s;return le(this,function(o){switch(o.label){case 0:return[4,r.iterator()];case 1:return s=(a=o.sent()).concatenate,[4,t.iterator()];case 2:return[2,s.apply(a,[o.sent()])]}})})},i)},n.prototype.filter=function(t){var e=this,r=this,i;return this.size===Infinity?i=Infinity:i=null,an(function(){return ce(e,void 0,void 0,function(){return le(this,function(a){switch(a.label){case 0:return[4,r.iterator()];case 1:return[2,a.sent().filter(function(s){return Ce.tidy(function(){return t(s)})})]}})})},i)},n.prototype.forEachAsync=function(t){return ce(this,void 0,void 0,function(){return le(this,function(e){switch(e.label){case 0:return[4,this.iterator()];case 1:return[2,e.sent().forEachAsync(t)]}})})},n.prototype.map=function(t){var e=this,r=this;return an(function(){return ce(e,void 0,void 0,function(){return le(this,function(i){switch(i.label){case 0:return[4,r.iterator()];case 1:return[2,i.sent().map(function(a){return Ce.tidy(function(){return t(a)})})]}})})},this.size)},n.prototype.mapAsync=function(t){var e=this,r=this;return an(function(){return ce(e,void 0,void 0,function(){return le(this,function(i){switch(i.label){case 0:return[4,r.iterator()];case 1:return[2,i.sent().mapAsync(t)]}})})},this.size)},n.prototype.prefetch=function(t){var e=this;if(t==null)throw new RangeError("`Dataset.prefetch()` requires bufferSize to be specified.");var r=this;return an(function(){return ce(e,void 0,void 0,function(){return le(this,function(i){switch(i.label){case 0:return[4,r.iterator()];case 1:return[2,i.sent().prefetch(t)]}})})},this.size)},n.prototype.repeat=function(t){var e=this,r=this,i;return this.size!=null&&t>0?i=this.size*t:t===0?i=0:this.size!=null&&(t===void 0||t<0)?i=Infinity:i=null,an(function(){return ce(e,void 0,void 0,function(){var a,s=this;return le(this,function(o){return a=ap(function(){return ce(s,void 0,void 0,function(){var c;return le(this,function(l){switch(l.label){case 0:return c={},[4,r.iterator()];case 1:return[2,(c.value=l.sent(),c.done=!1,c)]}})})}),[2,v8(a.take(t))]})})},i)},n.prototype.skip=function(t){var e=this,r=this,i;return this.size!=null&&t>=0&&this.size>=t?i=this.size-t:this.size!=null&&(this.size<t||t===void 0||t<0)?i=0:i=null,an(function(){return ce(e,void 0,void 0,function(){return le(this,function(a){switch(a.label){case 0:return[4,r.iterator()];case 1:return[2,a.sent().skip(t)]}})})},i)},n.prototype.shuffle=function(t,e,r){var i=this;if(r===void 0&&(r=!0),t==null||t<0)throw this.size==null?new RangeError("`Dataset.shuffle()` requires bufferSize to be specified."):new RangeError("`Dataset.shuffle()` requires bufferSize to be specified.  If your data fits in main memory (for regular JS objects), and/or GPU memory (for `tf.Tensor`s), consider setting "+("bufferSize to the dataset size ("+this.size+" elements)"));var a=this,s=Aw(e||Ce.util.now().toString());return an(function(){return ce(i,void 0,void 0,function(){var o;return le(this,function(c){switch(c.label){case 0:return o=s.int32(),r&&(o+=s.int32()),[4,a.iterator()];case 1:return[2,c.sent().shuffle(t,o.toString())]}})})},this.size)},n.prototype.take=function(t){var e=this,r=this,i;return this.size!=null&&this.size>t?i=t:this.size!=null&&this.size<=t?i=this.size:i=null,an(function(){return ce(e,void 0,void 0,function(){return le(this,function(a){switch(a.label){case 0:return[4,r.iterator()];case 1:return[2,a.sent().take(t)]}})})},i)},n.prototype.toArray=function(){return ce(this,void 0,void 0,function(){return le(this,function(t){switch(t.label){case 0:if(this.size===Infinity)throw new Error("Can not convert 
`).map(function(s){return s.endsWith("\r")&&(s=s.slice(0,-1)),s}),[2,i]}})})},t}(ys);var uc='"',vs=Symbol("out"),Fw=Symbol("field"),hc=Symbol("quote"),op=Symbol("quoteafterquote"),Ww=Symbol("quoteinquote"),Uw=function(n){Ge(t,n);function t(e,r){var i=n.call(this)||this;return i.input=e,i.hasHeader=!0,i.fullColumnNames=null,i.columnNamesValidated=!1,i.columnConfigs=null,i.configuredColumnsOnly=!1,i.delimiter=",",i.delimWhitespace=!1,i.base=new kw(e),r||(r={}),i.hasHeader=!(r.hasHeader===!1),i.fullColumnNames=r.columnNames,i.columnConfigs=r.columnConfigs,i.configuredColumnsOnly=r.configuredColumnsOnly,r.delimWhitespace?(Ce.util.assert(r.delimiter==null,function(){return"Delimiter should not be provided when delimWhitespace is true."}),i.delimWhitespace=!0,i.delimiter=" "):i.delimiter=r.delimiter?r.delimiter:",",i}return t.prototype.columnNames=function(){return ce(this,void 0,void 0,function(){return le(this,function(e){switch(e.label){case 0:return this.columnNamesValidated?[3,2]:[4,this.setColumnNames()];case 1:e.sent(),e.label=2;case 2:return[2,this.configuredColumnsOnly?Object.keys(this.columnConfigs):this.fullColumnNames]}})})},t.prototype.setColumnNames=function(){return ce(this,void 0,void 0,function(){var e,r,i,a,s,o,c,l=this;return le(this,function(u){switch(u.label){case 0:return[4,this.maybeReadHeaderLine()];case 1:if(e=u.sent(),!this.fullColumnNames&&!e)throw new Error("Column names must be provided if there is no header line.");if(this.fullColumnNames&&e&&Ce.util.assert(e.length===this.fullColumnNames.length,function(){return"The length of provided columnNames ("+l.fullColumnNames.length.toString()+") does not match the length of the header line read from file ("+e.length.toString()+")."}),this.fullColumnNames||(this.fullColumnNames=e),r=this.fullColumnNames.reduce(function(h,d){return h[d]=h[d]+1||1,h},{}),i=Object.keys(r).filter(function(h){return r[h]>1}),Ce.util.assert(i.length===0,function(){return"Duplicate column names found: "+i.toString()}),this.columnConfigs){for(a=0,s=Object.keys(this.columnConfigs);a<s.length;a++)if(o=s[a],c=this.fullColumnNames.indexOf(o),c===-1)throw new Error('The key "'+o+'" provided in columnConfigs does not match any of the column names ('+this.fullColumnNames.toString()+").")}return this.columnNamesValidated=!0,[2]}})})},t.prototype.maybeReadHeaderLine=function(){return ce(this,void 0,void 0,function(){var e,r,i,a;return le(this,function(s){switch(s.label){case 0:return this.hasHeader?[4,this.base.iterator()]:[3,3];case 1:return e=s.sent(),[4,e.next()];case 2:if(r=s.sent(),r.done)throw new Error("No data was found for CSV parsing.");return i=r.value,a=this.parseRow(i,!1),[2,a];case 3:return[2,null]}})})},t.prototype.iterator=function(){return ce(this,void 0,void 0,function(){var e,r=this;return le(this,function(i){switch(i.label){case 0:return this.columnNamesValidated?[3,2]:[4,this.setColumnNames()];case 1:i.sent(),i.label=2;case 2:return[4,this.base.iterator()];case 3:return e=i.sent(),this.hasHeader&&(e=e.skip(1)),[2,e.map(function(a){return r.makeDataElement(a)})]}})})},t.prototype.makeDataElement=function(e){for(var r=this.parseRow(e),i={},a={},s=0;s<this.fullColumnNames.length;s++){var o=this.fullColumnNames[s],c=this.columnConfigs?this.columnConfigs[o]:null;if(this.configuredColumnsOnly&&!c)continue;var l=r[s],u=null;if(l==="")if(c&&c.default!==void 0)u=c.default;else{if(c&&(c.required||c.isLabel))throw new Error("Required column "+o+" is empty in this line: "+e);u=void 0}else{var h=Number(l);if(isNaN(h))c&&c.dtype==="bool"?u=this.getBoolean(l):u=l;else if(!c||!c.dtype)u=h;else switch(c.dtype){case"float32":u=h;break;case"int32":u=Math.floor(h);break;case"bool":u=this.getBoolean(l);break;default:u=h}}c&&c.isLabel?a[o]=u:i[o]=u}return Object.keys(a).length===0?i:{xs:i,ys:a}},t.prototype.getBoolean=function(e){return e==="1"||e.toLowerCase()==="true"?1:0},t.prototype.parseRow=function(e,r){r===void 0&&(r=!0);for(var i=[],a=0,s=e.length,o=vs,c=0;c<s;c++)switch(o){case vs:switch(e.charAt(c)){case uc:a=c+1,o=hc;break;case this.delimiter:if(a=c+1,this.delimiter===" "&&this
============================
Hi there \u{1F44B}. Looks like you are running TensorFlow.js in Node.js. To speed things up dramatically, install our node backend, which binds to TensorFlow C++, by running npm i @tensorflow/tfjs-node, or npm i @tensorflow/tfjs-node-gpu if you have CUDA. Then call require('@tensorflow/tfjs-node'); (-gpu suffix for CUDA) at the start of your program. Visit https://github.com/tensorflow/tfjs-node for more details.
============================`));var a={};return this.data.set(a,{values:e,dtype:i,refCount:1}),a},t.prototype.makeTensorInfo=function(e,r,i){var a;if(r==="string"&&i!=null&&i.length>0&&L.util.isString(i[0])){var s=i.map(function(o){return L.util.encodeString(o)});a=this.write(s,e,r)}else a=this.write(i,e,r);return{dataId:a,shape:e,dtype:r}},t.prototype.incRef=function(e){var r=this.data.get(e);r.refCount++},t.prototype.decRef=function(e){if(this.data.has(e)){var r=this.data.get(e);r.refCount--}},t.prototype.move=function(e,r,i,a){this.data.set(e,{values:r,dtype:a,refCount:1})},t.prototype.numDataIds=function(){return this.data.numDataIds()},t.prototype.read=function(e){return sb(this,void 0,void 0,function(){return ob(this,function(r){return[2,this.readSync(e)]})})},t.prototype.readSync=function(e){var r=this.data.get(e),i=r.dtype,a=r.complexTensorInfos;if(i==="complex64"){var s=this.readSync(a.real.dataId),o=this.readSync(a.imag.dataId);return L.backend_util.mergeRealAndImagArrays(s,o)}return this.data.get(e).values},t.prototype.bufferSync=function(e){var r=this.readSync(e.dataId),i=r;if(e.dtype==="string")try{i=r.map(function(a){return L.util.decodeString(a)})}catch(a){throw new Error("Failed to decode encoded string bytes into utf-8")}return L.buffer(e.shape,e.dtype,i)},t.prototype.makeOutput=function(e,r,i){var a=this.write(e,r,i);return L.engine().makeTensorFromDataId(a,r,i,this)},t.prototype.disposeData=function(e){if(this.data.has(e)){var r=this.data.get(e).complexTensorInfos;r!=null&&(this.disposeData(r.real.dataId),this.disposeData(r.imag.dataId)),this.data.delete(e)}},t.prototype.disposeIntermediateTensorInfo=function(e){var r=e.dataId;if(this.data.has(r)){var i=this.data.get(r);i.refCount--,i.refCount<1&&this.disposeData(r)}},t.prototype.time=function(e){return sb(this,void 0,void 0,function(){var r,i;return ob(this,function(a){return r=L.util.now(),e(),i=L.util.now()-r,[2,{kernelMs:i}]})})},t.prototype.memory=function(){return{unreliable:!0,reasons:["The reported memory is an upper bound. Due to automatic garbage collection, the true allocated memory may be less."]}},t.prototype.stridedSlice=function(e,r,i,a){ae(e,"stridedSlice");var s=L.slice_util.computeOutShape(r,i,a);if(s.some(function(p){return p===0}))return L.tensor([],s);for(var o=L.buffer(s,e.dtype),c=this.bufferSync(e),l=0;l<o.size;l++){for(var u=o.indexToLoc(l),h=new Array(u.length),d=0;d<h.length;d++)h[d]=u[d]*a[d]+r[d];o.set.apply(o,[c.get.apply(c,h)].concat(u))}return o.toTensor()},t.prototype.diag=function(e){for(var r=this.readSync(e.dataId),i=L.buffer([e.size,e.size],e.dtype),a=i.values,s=0;s<r.length;s++)a[s*e.size+s]=r[s];return i.toTensor()},t.prototype.unstack=function(e,r){for(var i=e.shape[r],a=new Array(e.rank-1),s=0,o=0;o<e.rank;o++)o!==r&&(a[s++]=e.shape[o]);var c=new Array(e.rank).fill(0),l=e.shape.slice();l[r]=1;for(var u=new Array(i),o=0;o<u.length;o++)c[r]=o,u[o]=L.slice(e,c,l).reshape(a);return u},t.prototype.reverse=function(e,r){ae(e,"reverse");for(var i=L.buffer(e.shape,e.dtype),a=this.bufferSync(e),s=function(c){var l=i.indexToLoc(c),u=l.slice();r.forEach(function(h){return u[h]=e.shape[h]-1-u[h]}),i.set.apply(i,[a.get.apply(a,u)].concat(l))},o=0;o<i.size;o++)s(o);return i.toTensor()},t.prototype.neg=function(e){return ae(e,"neg"),L.mul(L.scalar(-1),e)},t.prototype.addN=function(e){var r=this;ae(e,"addN");for(var i=e.map(function(u){return r.readSync(u.dataId)}),a=L.buffer(e[0].shape,e[0].dtype),s=a.values,o=0;o<e.length;o++)for(var c=i[o],l=0;l<s.length;l++)s[l]+=c[l];return a.toTensor()},t.prototype.softmax=function(e,r){var i=L.util.parseAxisParam([r],e.shape),a=L.max(e,i),s=L.backend_util.expandShapeToKeepDim(a.shape,i),o=L.sub(e,a.reshape(s)),c=L.exp(o),l=this.sum(c,i).reshape(s);return L.div(c,l)},t.prototype.pow=function(e,r){return ae([e,r],"pow"),this.broadcastedBinaryOp(e,r,e.dtype,function(i,a){return Math.pow(i,a)})},t.prototype.floorDiv=function(e,r){ae([e,r],"floorDiv");var i=function(s,o){return Math.floor(s/o)},a="int32";return this.broadcastedBinaryOp(e,r,a,i)},t.prototype.sum=function(e,r){ae(e,"sum"),L.ba
`),a=i.length.toString().length+2,s=i.map(function(d,p){return _.util.rightPad((p+1).toString(),a)+d}),o=0,c=0;c<s.length;c++)o=Math.max(s[c].length,o);var l=s.slice(0,r-1),u=s.slice(r-1,r),h=s.slice(r);console.log(l.join(`
`)),console.log(t.split(`
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`))}function Gb(n){return ur(n,function(){return n.createProgram()},"Unable to create WebGLProgram.")}function Yb(n,t){if(de(n,function(){return n.linkProgram(t)}),n.getProgramParameter(t,n.LINK_STATUS)===!1)throw console.log(n.getProgramInfoLog(t)),new Error("Failed to link vertex and fragment shaders.")}function gc(n,t){if(de(n,function(){return n.validateProgram(t)}),n.getProgramParameter(t,n.VALIDATE_STATUS)===!1)throw console.log(n.getProgramInfoLog(t)),new Error("Shader program validation failed.")}function jb(n,t){var e=ur(n,function(){return n.createBuffer()},"Unable to create WebGLBuffer");return de(n,function(){return n.bindBuffer(n.ARRAY_BUFFER,e)}),de(n,function(){return n.bufferData(n.ARRAY_BUFFER,t,n.STATIC_DRAW)}),e}function Kb(n,t){var e=ur(n,function(){return n.createBuffer()},"Unable to create WebGLBuffer");return de(n,function(){return n.bindBuffer(n.ELEMENT_ARRAY_BUFFER,e)}),de(n,function(){return n.bufferData(n.ELEMENT_ARRAY_BUFFER,t,n.STATIC_DRAW)}),e}function TU(){return _.env().getNumber("WEBGL_VERSION")===2?1:4}function $b(n){return ur(n,function(){return n.createTexture()},"Unable to create WebGLTexture.")}function Xb(n,t){var e=_.env().getNumber("WEBGL_MAX_TEXTURE_SIZE");if(n<=0||t<=0){var r="["+n+"x"+t+"]";throw new Error("Requested texture size "+r+" is invalid.")}if(n>e||t>e){var r="["+n+"x"+t+"]",i="["+e+"x"+e+"]";throw new Error("Requested texture size "+r+" greater than WebGL maximum on this browser / GPU "+i+".")}}function Jb(n){return ur(n,function(){return n.createFramebuffer()},"Unable to create WebGLFramebuffer.")}function Tp(n,t,e,r,i,a,s){var o=n.getAttribLocation(t,e);return o===-1?!1:(de(n,function(){return n.bindBuffer(n.ARRAY_BUFFER,r)}),de(n,function(){return n.vertexAttribPointer(o,i,n.FLOAT,!1,a,s)}),de(n,function(){return n.enableVertexAttribArray(o)}),!0)}function Qb(n,t,e){Zb(n,e),de(n,function(){return n.activeTexture(n.TEXTURE0+e)}),de(n,function(){return n.bindTexture(n.TEXTURE_2D,t)})}function NU(n,t){Zb(n,t),de(n,function(){return n.activeTexture(n.TEXTURE0+t)}),de(n,function(){return n.bindTexture(n.TEXTURE_2D,null)})}function e2(n,t,e){return ur(n,function(){return n.getUniformLocation(t,e)},'uniform "'+e+'" not present in program.')}function t2(n,t,e){return n.getUniformLocation(t,e)}function n2(n,t,e,r){de(n,function(){return Qb(n,t,r)}),de(n,function(){return n.uniform1i(e,r)})}function _U(n){de(n,function(){return n.bindFramebuffer(n.FRAMEBUFFER,null)}),de(n,function(){return n.viewport(0,0,n.canvas.width,n.canvas.height)}),de(n,function(){return n.scissor(0,0,n.canvas.width,n.canvas.height)})}function yc(n,t,e){de(n,function(){return n.bindFramebuffer(n.FRAMEBUFFER,e)}),de(n,function(){return n.framebufferTexture2D(n.FRAMEBUFFER,n.COLOR_ATTACHMENT0,n.TEXTURE_2D,t,0)})}function Np(n,t){de(n,function(){return n.bindFramebuffer(n.FRAMEBUFFER,t)}),de(n,function(){return n.framebufferTexture2D(n.FRAMEBUFFER,n.COLOR_ATTACHMENT0,n.TEXTURE_2D,null,0)})}function _s(n){var t=n.checkFramebufferStatus(n.FRAMEBUFFER);if(t!==n.FRAMEBUFFER_COMPLETE)throw new Error("Error binding framebuffer: "+r2(n,t))}function r2(n,t){switch(t){case n.FRAMEBUFFER_INCOMPLETE_ATTACHMENT:return"FRAMEBUFFER_INCOMPLETE_ATTACHMENT";case n.FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT:return"FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT";case n.FRAMEBUFFER_INCOMPLETE_DIMENSIONS:return"FRAMEBUFFER_INCOMPLETE_DIMENSIONS";case n.FRAMEBUFFER_UNSUPPORTED:return"FRAMEBUFFER_UNSUPPORTED";default:return"unknown error "+t}}function ur(n,t,e){var r=de(n,function(){return t()});if(r==null)throw new Error(e);return r}function Zb(n,t){var e=n.MAX_COMBINED_TEXTURE_IMAGE_UNITS-1,r=t+n.TEXTURE0;if(r<n.TEXTURE0||r>e){var i="[gl.TEXTURE0, gl.TEXTURE"+e+"]";throw new Error("textureUnit must be in "+i+".")}}function Ti(n,t){return t===void 0&&(t=2),_.util.sizeFromShape(n.slice(0,n.length-t))}function Ni(n){if(n.length===0)throw Error("Cannot get rows and columns of an empty shape array.");return[n.length>1?n[n.length-2]:1,n[n.length-1]]}function vc(n){var t=[1,1,1],e=n.length===0||n.length===1&&n[0]===1;return e||(t=[Ti(n)]
      void main() {
        `+r.join(`
        `)+`

        float result = `+i+`;
        setOutput(result);
      }
    `}return n}();var oB=function(){function n(t,e){this.outputShape=[],this.packedInputs=!0,this.packedOutput=!0,this.outputShape=t,this.variableNames=e.map(function(a,s){return"T"+s});var r=[];this.variableNames.forEach(function(a){r.push("vec4 v"+a+" = get"+a+"AtOutCoords();")});var i=this.variableNames.map(function(a){return"v"+a}).join(" + ");this.userCode=`
      void main() {
        `+r.join(`
        `)+`

        vec4 result = `+i+`;
        setOutput(result);
      }
    `}return n}();var cB=function(){function n(t,e,r){this.variableNames=["A"];var i=t.windowSize,a=t.batchSize,s=t.outSize;r||this.variableNames.push("bestIndicesA"),this.outputShape=[a,s];var o=e==="max"?">":"<",c=r?"inOffset + i;":"round(getBestIndicesA(batch, inOffset + i));";this.userCode=`
      void main() {
        ivec2 coords = getOutputCoords();
        int batch = coords[0];
        int outIdx = coords[1];
        int inOffset = outIdx * `+i+`;

        int bestIndex = inOffset;
        float bestValue = getA(batch, bestIndex);

        for (int i = 0; i < `+i+`; i++) {
          int inIdx = `+c+`;
          float candidate = getA(batch, inIdx);
          if (candidate `+o+` bestValue) {
            bestValue = candidate;
            bestIndex = inIdx;
          }
        }
        setOutput(float(bestIndex));
      }
    `}return n}();function h2(n,t){return["x","y","z","w","u","v"].slice(0,t).map(function(e){return n+"."+e})}function Mt(n,t){return t===1?[n]:h2(n,t)}function lB(n,t){if(n===1)return"rc";for(var e="",r=0;r<n;r++)e+=t[r],r<n-1&&(e+=",");return e}function Ht(){var n,t,e,r,i,a,s,o,c,l;return _.env().getNumber("WEBGL_VERSION")===2?(n="#version 300 es",t="in",e="out",r="in",i="texture",a="outputColor",s="out vec4 outputColor;",o=`
      bool isnan_custom(float val) {
        return (val > 0.0 || val < 0.0) ? false : val != 0.0;
      }

      bvec4 isnan_custom(vec4 val) {
        return bvec4(isnan_custom(val.x),
          isnan_custom(val.y), isnan_custom(val.z), isnan_custom(val.w));
      }

      #define isnan(value) isnan_custom(value)
    `,c="",l=`
      #define round(value) newRound(value)
      int newRound(float value) {
        return int(floor(value + 0.5));
      }

      ivec4 newRound(vec4 value) {
        return ivec4(floor(value + vec4(0.5)));
      }
    `):(n="",t="attribute",e="varying",r="varying",i="texture2D",a="gl_FragColor",s="",o=`
      #define isnan(value) isnan_custom(value)
      bool isnan_custom(float val) {
        return (val > 0. || val < 1. || val == 0.) ? false : true;
      }
      bvec4 isnan_custom(vec4 val) {
        return bvec4(isnan(val.x), isnan(val.y), isnan(val.z), isnan(val.w));
      }
    `,c=`
      uniform float INFINITY;

      bool isinf(float val) {
        return abs(val) == INFINITY;
      }
      bvec4 isinf(vec4 val) {
        return equal(abs(val), vec4(INFINITY));
      }
    `,l=`
      int round(float value) {
        return int(floor(value + 0.5));
      }

      ivec4 round(vec4 value) {
        return ivec4(floor(value + vec4(0.5)));
      }
    `),{version:n,attribute:t,varyingVs:e,varyingFs:r,texture2D:i,output:a,defineOutput:s,defineSpecialNaN:o,defineSpecialInf:c,defineRound:l}}function _i(n,t,e){e===void 0&&(e="index");var r=_.util.computeStrides(t);return r.map(function(i,a){var s="int "+n[a]+" = "+e+" / "+i,o=a===r.length-1?"int "+n[a+1]+" = "+e+" - "+n[a]+" * "+i:"index -= "+n[a]+" * "+i;return s+"; "+o+";"}).join("")}function Ep(n){var t=_.util.computeStrides(n).map(function(e){return e.toString()});return`
  int getFlatIndex(ivec3 coords) {
    return coords.x * `+t[0]+" + coords.y * "+t[1]+` + coords.z;
  }
`}var d2=`
  const float FLOAT_MAX = 1.70141184e38;
  const float FLOAT_MIN = 1.17549435e-38;

  lowp vec4 encode_float(highp float v) {
    if (isnan(v)) {
      return vec4(255, 255, 255, 255);
    }

    highp float av = abs(v);

    if(av < FLOAT_MIN) {
      return vec4(0.0, 0.0, 0.0, 0.0);
    } else if(v > FLOAT_MAX) {
      return vec4(0.0, 0.0, 128.0, 127.0) / 255.0;
    } else if(v < -FLOAT_MAX) {
      return vec4(0.0, 0.0,  128.0, 255.0) / 255.0;
    }

    highp vec4 c = vec4(0,0,0,0);

    highp float e = floor(log2(av));
    highp float m = exp2(fract(log2(av))) - 1.0;

    c[2] = floor(128.0 * m);
    m -= c[2] / 128.0;
    c[1] = floor(32768.0 * m);
    m -= c[1] / 32768.0;
    c[0] = floor(8388608.0 * m);

    highp float ebias = e + 127.0;
    c[3] = floor(ebias / 2.0);
    ebias -= c[3] * 2.0;
    c[2] += floor(ebias) * 128.0;

    c[3] += 128.0 * step(0.0, -v);

    return c / 255.0;
  }
`;var p2=_.backend_util.getBroadcastDims;function vB(n,t,e,r){var i=[];n.forEach(function(f){var m=_.util.sizeFromShape(f.shapeInfo.logicalShape);f.shapeInfo.isUniform?i.push("uniform float "+f.name+(m>1?"["+m+"]":"")+";"):(i.push("uniform sampler2D "+f.name+";"),i.push("uniform int offset"+f.name+";"))});var a=i.join(`
`),s=n.map(function(f){return uB(f,t,r)}).join(`
`),o=t.texShape,c=Ht(),l=pB(c),u,h,d=gB(c);t.isPacked?(u=hB(t.logicalShape,o),h=mB(c)):(u=dB(t.logicalShape,o),h=fB(c)),r&&(d+=yB);var p=[d,l,h,a,u,s,e].join(`
`);return p}function wa(n){var t=n.shapeInfo.logicalShape;switch(t.length){case 0:return wB(n);case 1:return bB(n);case 2:return xB(n);case 3:return SB(n);case 4:return LB(n);case 5:return IB(n);case 6:return AB(n);default:throw new Error(t.length+"-D input sampling is not yet supported")}}function f2(n){var t=n.shapeInfo.logicalShape;switch(t.length){case 0:return TB(n);case 1:return NB(n);case 2:return _B(n);case 3:return CB(n);default:return RB(n)}}function uB(n,t,e){e===void 0&&(e=!1);var r="";e?r+=f2(n):r+=wa(n);var i=n.shapeInfo.logicalShape,a=t.logicalShape;return i.length<=a.length&&(e?r+=OB(n,t):r+=EB(n,t)),r}function hB(n,t){switch(n.length){case 0:return m2();case 1:return DB(n,t);case 2:return WB(n,t);case 3:return kB(n,t);default:return FB(n,t)}}function dB(n,t){switch(n.length){case 0:return m2();case 1:return UB(n,t);case 2:return HB(n,t);case 3:return BB(n,t);case 4:return zB(n,t);case 5:return PB(n,t);case 6:return MB(n,t);default:throw new Error(n.length+"-D output sampling is not yet supported")}}function pB(n){return`
    float sampleTexture(sampler2D textureSampler, vec2 uv) {
      return `+n.texture2D+`(textureSampler, uv).r;
    }
  `}function fB(n){return`
    void setOutput(float val) {
      `+n.output+` = vec4(val, 0, 0, 0);
    }
  `}function mB(n){return`
    void setOutput(vec4 val) {
      `+n.output+` = val;
    }
  `}function gB(n){var t=n.version+`
    precision highp float;
    precision highp int;
    precision highp sampler2D;
    `+n.varyingFs+` vec2 resultUV;
    `+n.defineOutput+`
    const vec2 halfCR = vec2(0.5, 0.5);

    struct ivec5
    {
      int x;
      int y;
      int z;
      int w;
      int u;
    };

    struct ivec6
    {
      int x;
      int y;
      int z;
      int w;
      int u;
      int v;
    };

    uniform float NAN;
    `+n.defineSpecialNaN+`
    `+n.defineSpecialInf+`
    `+n.defineRound+`

    int imod(int x, int y) {
      return x - y * (x / y);
    }

    int idiv(int a, int b, float sign) {
      int res = a / b;
      int mod = imod(a, b);
      if (sign < 0. && mod != 0) {
        res -= 1;
      }
      return res;
    }

    //Based on the work of Dave Hoskins
    //https://www.shadertoy.com/view/4djSRW
    #define HASHSCALE1 443.8975
    float random(float seed){
      vec2 p = resultUV * seed;
      vec3 p3  = fract(vec3(p.xyx) * HASHSCALE1);
      p3 += dot(p3, p3.yzx + 19.19);
      return fract((p3.x + p3.y) * p3.z);
    }

    `+VB+`
    `+qB+`
    `+GB+`
  `;return t}var VB=`
vec2 uvFromFlat(int texNumR, int texNumC, int index) {
  int texR = index / texNumC;
  int texC = index - texR * texNumC;
  return (vec2(texC, texR) + halfCR) / vec2(texNumC, texNumR);
}
vec2 packedUVfrom1D(int texNumR, int texNumC, int index) {
  int texelIndex = index / 2;
  int texR = texelIndex / texNumC;
  int texC = texelIndex - texR * texNumC;
  return (vec2(texC, texR) + halfCR) / vec2(texNumC, texNumR);
}
`,qB=`
vec2 packedUVfrom2D(int texelsInLogicalRow, int texNumR,
  int texNumC, int row, int col) {
  int texelIndex = (row / 2) * texelsInLogicalRow + (col / 2);
  int texR = texelIndex / texNumC;
  int texC = texelIndex - texR * texNumC;
  return (vec2(texC, texR) + halfCR) / vec2(texNumC, texNumR);
}
`,GB=`
vec2 packedUVfrom3D(int texNumR, int texNumC,
    int texelsInBatch, int texelsInLogicalRow, int b,
    int row, int col) {
  int index = b * texelsInBatch + (row / 2) * texelsInLogicalRow + (col / 2);
  int texR = index / texNumC;
  int texC = index - texR * texNumC;
  return (vec2(texC, texR) + halfCR) / vec2(texNumC, texNumR);
}
`,yB=`
  float getChannel(vec4 frag, vec2 innerDims) {
    vec2 modCoord = mod(innerDims, 2.);
    return modCoord.x == 0. ?
      (modCoord.y == 0. ? frag.r : frag.g) :
      (modCoord.y == 0. ? frag.b : frag.a);
  }
  float getChannel(vec4 frag, int dim) {
    float modCoord = mod(float(dim), 2.);
    return modCoord == 0. ? frag.r : frag.g;
  }
`;function m2(){return`
    int getOutputCoords() {
      return 0;
    }
  `}function DB(n,t){var e=[Math.ceil(t[0]/2),Math.ceil(t[1]/2)];return e[0]===1?`
      int getOutputCoords() {
        return 2 * int(resultUV.x * `+e[1]+`.0);
      }
    `:e[1]===1?`
      int getOutputCoords() {
        return 2 * int(resultUV.y * `+e[0]+`.0);
      }
    `:`
    int getOutputCoords() {
      ivec2 resTexRC = ivec2(resultUV.yx *
                             vec2(`+e[0]+", "+e[1]+`));
      return 2 * (resTexRC.x * `+e[1]+` + resTexRC.y);
    }
  `}function UB(n,t){return t[0]===1?`
      int getOutputCoords() {
        return int(resultUV.x * `+t[1]+`.0);
      }
    `:t[1]===1?`
      int getOutputCoords() {
        return int(resultUV.y * `+t[0]+`.0);
      }
    `:`
    int getOutputCoords() {
      ivec2 resTexRC = ivec2(resultUV.yx *
                             vec2(`+t[0]+", "+t[1]+`));
      return resTexRC.x * `+t[1]+` + resTexRC.y;
    }
  `}function kB(n,t){var e=[Math.ceil(t[0]/2),Math.ceil(t[1]/2)],r=Math.ceil(n[2]/2),i=r*Math.ceil(n[1]/2);return`
    ivec3 getOutputCoords() {
      ivec2 resTexRC = ivec2(resultUV.yx *
                             vec2(`+e[0]+", "+e[1]+`));
      int index = resTexRC.x * `+e[1]+` + resTexRC.y;

      int b = index / `+i+`;
      index -= b * `+i+`;

      int r = 2 * (index / `+r+`);
      int c = imod(index, `+r+`) * 2;

      return ivec3(b, r, c);
    }
  `}function BB(n,t){var e=_i(["r","c","d"],n);return`
    ivec3 getOutputCoords() {
      ivec2 resTexRC = ivec2(resultUV.yx *
                             vec2(`+t[0]+", "+t[1]+`));
      int index = resTexRC.x * `+t[1]+` + resTexRC.y;
      `+e+`
      return ivec3(r, c, d);
    }
  `}function FB(n,t){for(var e=[Math.ceil(t[0]/2),Math.ceil(t[1]/2)],r=Math.ceil(n[n.length-1]/2),i=r*Math.ceil(n[n.length-2]/2),a=i,s="",o="b, r, c",c=2;c<n.length-1;c++)a*=n[n.length-c-1],s=`
      int b`+c+" = index / "+a+`;
      index -= b`+c+" * "+a+`;
    `+s,o="b"+c+", "+o;return`
    ivec`+n.length+` getOutputCoords() {
      ivec2 resTexRC = ivec2(resultUV.yx *
                             vec2(`+e[0]+", "+e[1]+`));
      int index = resTexRC.x * `+e[1]+` + resTexRC.y;

      `+s+`

      int b = index / `+i+`;
      index -= b * `+i+`;

      int r = 2 * (index / `+r+`);
      int c = imod(index, `+r+`) * 2;

      return ivec`+n.length+"("+o+`);
    }
  `}function zB(n,t){var e=_i(["r","c","d","d2"],n);return`
    ivec4 getOutputCoords() {
      ivec2 resTexRC = ivec2(resultUV.yx *
        vec2(`+t[0]+", "+t[1]+`));
      int index = resTexRC.x * `+t[1]+` + resTexRC.y;
      `+e+`
      return ivec4(r, c, d, d2);
    }
  `}function PB(n,t){var e=_i(["r","c","d","d2","d3"],n);return`
    ivec5 getOutputCoords() {
      ivec2 resTexRC = ivec2(resultUV.yx * vec2(`+t[0]+`,
                             `+t[1]+`));

      int index = resTexRC.x * `+t[1]+` + resTexRC.y;

      `+e+`

      ivec5 outShape = ivec5(r, c, d, d2, d3);
      return outShape;
    }
  `}function MB(n,t){var e=_i(["r","c","d","d2","d3","d4"],n);return`
    ivec6 getOutputCoords() {
      ivec2 resTexRC = ivec2(resultUV.yx *
        vec2(`+t[0]+", "+t[1]+`));
      int index = resTexRC.x * `+t[1]+` + resTexRC.y;

      `+e+`

      ivec6 result = ivec6(r, c, d, d2, d3, d4);
      return result;
    }
  `}function WB(n,t){var e=[Math.ceil(t[0]/2),Math.ceil(t[1]/2)];if(_.util.arraysEqual(n,t))return`
      ivec2 getOutputCoords() {
        return 2 * ivec2(resultUV.yx * vec2(`+e[0]+", "+e[1]+`));
      }
    `;var r=Math.ceil(n[1]/2);return`
    ivec2 getOutputCoords() {
      ivec2 resTexRC = ivec2(resultUV.yx *
                             vec2(`+e[0]+", "+e[1]+`));

      int index = resTexRC.x * `+e[1]+` + resTexRC.y;
      int r = 2 * (index / `+r+`);
      int c = imod(index, `+r+`) * 2;

      return ivec2(r, c);
    }
  `}function HB(n,t){return _.util.arraysEqual(n,t)?`
      ivec2 getOutputCoords() {
        return ivec2(resultUV.yx * vec2(`+t[0]+", "+t[1]+`));
      }
    `:n[1]===1?`
      ivec2 getOutputCoords() {
        ivec2 resTexRC = ivec2(resultUV.yx *
                               vec2(`+t[0]+", "+t[1]+`));
        int index = resTexRC.x * `+t[1]+` + resTexRC.y;
        return ivec2(index, 0);
      }
    `:n[0]===1?`
      ivec2 getOutputCoords() {
        ivec2 resTexRC = ivec2(resultUV.yx *
                               vec2(`+t[0]+", "+t[1]+`));
        int index = resTexRC.x * `+t[1]+` + resTexRC.y;
        return ivec2(0, index);
      }
    `:`
    ivec2 getOutputCoords() {
      ivec2 resTexRC = ivec2(resultUV.yx *
                             vec2(`+t[0]+", "+t[1]+`));
      int index = resTexRC.x * `+t[1]+` + resTexRC.y;
      int r = index / `+n[1]+`;
      int c = index - r * `+n[1]+`;
      return ivec2(r, c);
    }
  `}function Ci(n){return"offset"+n}function TB(n){var t=n.name,e="get"+t.charAt(0).toUpperCase()+t.slice(1),r=Ht();return`
    vec4 `+e+`() {
      return `+r.texture2D+"("+t+`, halfCR);
    }
  `}function wB(n){var t=n.name,e="get"+t.charAt(0).toUpperCase()+t.slice(1);if(n.shapeInfo.isUniform)return"float "+e+"() {return "+t+";}";var r=n.shapeInfo.texShape,i=r[0],a=r[1];if(i===1&&a===1)return`
      float `+e+`() {
        return sampleTexture(`+t+`, halfCR);
      }
    `;var s=n.shapeInfo.texShape,o=s[0],c=s[1],l=Ci(t);return`
    float `+e+`() {
      vec2 uv = uvFromFlat(`+o+", "+c+", "+l+`);
      return sampleTexture(`+t+`, uv);
    }
  `}function NB(n){var t=n.name,e="get"+t.charAt(0).toUpperCase()+t.slice(1),r=n.shapeInfo.texShape,i=[Math.ceil(r[0]/2),Math.ceil(r[1]/2)],a=Ht();return`
    vec4 `+e+`(int index) {
      vec2 uv = packedUVfrom1D(
        `+i[0]+", "+i[1]+`, index);
      return `+a.texture2D+"("+t+`, uv);
    }
  `}function bB(n){var t=n.name,e="get"+t.charAt(0).toUpperCase()+t.slice(1);if(n.shapeInfo.isUniform)return`
      float `+e+`(int index) {
        `+ba(n)+`
      }
    `;var r=n.shapeInfo.texShape,i=r[0],a=r[1];if(a===1&&i===1)return`
      float `+e+`(int index) {
        return sampleTexture(`+t+`, halfCR);
      }
    `;var s=Ci(t);return a===1?`
      float `+e+`(int index) {
        vec2 uv = vec2(0.5, (float(index + `+s+") + 0.5) / "+i+`.0);
        return sampleTexture(`+t+`, uv);
      }
    `:i===1?`
      float `+e+`(int index) {
        vec2 uv = vec2((float(index + `+s+") + 0.5) / "+a+`.0, 0.5);
        return sampleTexture(`+t+`, uv);
      }
    `:`
    float `+e+`(int index) {
      vec2 uv = uvFromFlat(`+i+", "+a+", index + "+s+`);
      return sampleTexture(`+t+`, uv);
    }
  `}function _B(n){var t=n.shapeInfo.logicalShape,e=n.name,r="get"+e.charAt(0).toUpperCase()+e.slice(1),i=n.shapeInfo.texShape,a=i[0],s=i[1],o=Ht();if(i!=null&&_.util.arraysEqual(t,i))return`
      vec4 `+r+`(int row, int col) {
        vec2 uv = (vec2(col, row) + halfCR) / vec2(`+s+".0, "+a+`.0);

        return `+o.texture2D+"("+e+`, uv);
      }
    `;var c=[Math.ceil(i[0]/2),Math.ceil(i[1]/2)],l=Math.ceil(t[1]/2);return`
    vec4 `+r+`(int row, int col) {
      vec2 uv = packedUVfrom2D(`+l+", "+c[0]+", "+c[1]+`, row, col);
      return `+o.texture2D+"("+e+`, uv);
    }
  `}function xB(n){var t=n.shapeInfo.logicalShape,e=n.name,r="get"+e.charAt(0).toUpperCase()+e.slice(1),i=n.shapeInfo.texShape;if(i!=null&&_.util.arraysEqual(t,i)){var a=i[0],s=i[1];return`
    float `+r+`(int row, int col) {
      vec2 uv = (vec2(col, row) + halfCR) / vec2(`+s+".0, "+a+`.0);
      return sampleTexture(`+e+`, uv);
    }
  `}var o=_.util.squeezeShape(t),c=o.newShape,l=o.keptDims,u=c;if(u.length<t.length){var h=xa(n,u),d=["row","col"];return`
      `+wa(h)+`
      float `+r+`(int row, int col) {
        return `+r+"("+Sa(d,l)+`);
      }
    `}if(n.shapeInfo.isUniform)return`
      float `+r+`(int row, int col) {
        int index = round(dot(vec2(row, col), vec2(`+t[1]+`, 1)));
        `+ba(n)+`
      }
    `;var p=i[0],f=i[1],m=Ci(e);return f===1?`
    float `+r+`(int row, int col) {
      float index = dot(vec3(row, col, `+m+"), vec3("+t[1]+`, 1, 1));
      vec2 uv = vec2(0.5, (index + 0.5) / `+p+`.0);
      return sampleTexture(`+e+`, uv);
    }
  `:p===1?`
    float `+r+`(int row, int col) {
      float index = dot(vec3(row, col, `+m+"), vec3("+t[1]+`, 1, 1));
      vec2 uv = vec2((index + 0.5) / `+f+`.0, 0.5);
      return sampleTexture(`+e+`, uv);
    }
  `:`
  float `+r+`(int row, int col) {
    // Explicitly use integer operations as dot() only works on floats.
    int index = row * `+t[1]+" + col + "+m+`;
    vec2 uv = uvFromFlat(`+p+", "+f+`, index);
    return sampleTexture(`+e+`, uv);
  }
`}function CB(n){var t=n.shapeInfo.logicalShape,e=n.name,r="get"+e.charAt(0).toUpperCase()+e.slice(1),i=n.shapeInfo.texShape,a=[Math.ceil(i[0]/2),Math.ceil(i[1]/2)];if(t[0]===1){var s=t.slice(1),o=[1,2],c=xa(n,s),l=["b","row","col"];return`
        `+f2(c)+`
        vec4 `+r+`(int b, int row, int col) {
          return `+r+"("+Sa(l,o)+`);
        }
      `}var u=a[0],h=a[1],d=Math.ceil(t[2]/2),p=d*Math.ceil(t[1]/2),f=Ht();return`
    vec4 `+r+`(int b, int row, int col) {
      vec2 uv = packedUVfrom3D(
        `+u+", "+h+", "+p+", "+d+`, b, row, col);
      return `+f.texture2D+"("+e+`, uv);
    }
  `}function SB(n){var t=n.shapeInfo.logicalShape,e=n.name,r="get"+e.charAt(0).toUpperCase()+e.slice(1),i=t[1]*t[2],a=t[2],s=_.util.squeezeShape(t),o=s.newShape,c=s.keptDims,l=o;if(l.length<t.length){var u=xa(n,l),h=["row","col","depth"];return`
        `+wa(u)+`
        float `+r+`(int row, int col, int depth) {
          return `+r+"("+Sa(h,c)+`);
        }
      `}if(n.shapeInfo.isUniform)return`
      float `+r+`(int row, int col, int depth) {
        int index = round(dot(vec3(row, col, depth),
                          vec3(`+i+", "+a+`, 1)));
        `+ba(n)+`
      }
    `;var d=n.shapeInfo.texShape,p=d[0],f=d[1],m=n.shapeInfo.flatOffset;if(f===i&&m==null)return`
        float `+r+`(int row, int col, int depth) {
          float texR = float(row);
          float texC = dot(vec2(col, depth), vec2(`+a+`, 1));
          vec2 uv = (vec2(texC, texR) + halfCR) /
                     vec2(`+f+".0, "+p+`.0);
          return sampleTexture(`+e+`, uv);
        }
      `;if(f===a&&m==null)return`
    float `+r+`(int row, int col, int depth) {
      float texR = dot(vec2(row, col), vec2(`+t[1]+`, 1));
      float texC = float(depth);
      vec2 uv = (vec2(texC, texR) + halfCR) / vec2(`+f+".0, "+p+`.0);
      return sampleTexture(`+e+`, uv);
    }
  `;var g=Ci(e);return`
      float `+r+`(int row, int col, int depth) {
        // Explicitly use integer operations as dot() only works on floats.
        int index = row * `+i+" + col * "+a+" + depth + "+g+`;
        vec2 uv = uvFromFlat(`+p+", "+f+`, index);
        return sampleTexture(`+e+`, uv);
      }
  `}function RB(n){for(var t=n.shapeInfo.logicalShape,e=t.length,r=n.name,i="get"+r.charAt(0).toUpperCase()+r.slice(1),a=n.shapeInfo.texShape,s=[Math.ceil(a[0]/2),Math.ceil(a[1]/2)],o=s[0],c=s[1],l=Math.ceil(t[e-1]/2),u=l*Math.ceil(t[e-2]/2),h="int b, int row, int col",d="b * "+u+" + (row / 2) * "+l+" + (col / 2)",p=2;p<e-1;p++)h="int b"+p+", "+h,u*=t[e-p-1],d="b"+p+" * "+u+" + "+d;var f=Ht();return`
    vec4 `+i+"("+h+`) {
      int index = `+d+`;
      int texR = index / `+c+`;
      int texC = index - texR * `+c+`;
      vec2 uv = (vec2(texC, texR) + halfCR) / vec2(`+c+", "+o+`);
      return `+f.texture2D+"("+r+`, uv);
    }
  `}function LB(n){var t=n.shapeInfo.logicalShape,e=n.name,r="get"+e.charAt(0).toUpperCase()+e.slice(1),i=t[3],a=t[2]*i,s=t[1]*a,o=_.util.squeezeShape(t),c=o.newShape,l=o.keptDims;if(c.length<t.length){var u=xa(n,c),h=["row","col","depth","depth2"];return`
      `+wa(u)+`
      float `+r+`(int row, int col, int depth, int depth2) {
        return `+r+"("+Sa(h,l)+`);
      }
    `}if(n.shapeInfo.isUniform)return`
      float `+r+`(int row, int col, int depth, int depth2) {
        int index = round(dot(vec4(row, col, depth, depth2),
                          vec4(`+s+", "+a+", "+i+`, 1)));
        `+ba(n)+`
      }
    `;var d=n.shapeInfo.flatOffset,p=n.shapeInfo.texShape,f=p[0],m=p[1];if(m===s&&d==null)return`
      float `+r+`(int row, int col, int depth, int depth2) {
        float texR = float(row);
        float texC =
            dot(vec3(col, depth, depth2),
                vec3(`+a+", "+i+`, 1));
        vec2 uv = (vec2(texC, texR) + halfCR) /
                   vec2(`+m+".0, "+f+`.0);
        return sampleTexture(`+e+`, uv);
      }
    `;if(m===i&&d==null)return`
      float `+r+`(int row, int col, int depth, int depth2) {
        float texR = dot(vec3(row, col, depth),
                         vec3(`+t[1]*t[2]+", "+t[2]+`, 1));
        float texC = float(depth2);
        vec2 uv = (vec2(texC, texR) + halfCR) /
                  vec2(`+m+".0, "+f+`.0);
        return sampleTexture(`+e+`, uv);
      }
    `;var g=Ci(e);return`
    float `+r+`(int row, int col, int depth, int depth2) {
      // Explicitly use integer operations as dot() only works on floats.
      int index = row * `+s+" + col * "+a+` +
          depth * `+i+` + depth2;
      vec2 uv = uvFromFlat(`+f+", "+m+", index + "+g+`);
      return sampleTexture(`+e+`, uv);
    }
  `}function IB(n){var t=n.shapeInfo.logicalShape,e=n.name,r="get"+e.charAt(0).toUpperCase()+e.slice(1),i=t[4],a=t[3]*i,s=t[2]*a,o=t[1]*s,c=_.util.squeezeShape(t),l=c.newShape,u=c.keptDims;if(l.length<t.length){var h=xa(n,l),d=["row","col","depth","depth2","depth3"];return`
      `+wa(h)+`
      float `+r+`(int row, int col, int depth, int depth2, int depth3) {
        return `+r+"("+Sa(d,u)+`);
      }
    `}if(n.shapeInfo.isUniform)return`
      float `+r+`(int row, int col, int depth, int depth2, int depth3) {
        float index = dot(
          vec4(row, col, depth, depth2),
          vec4(`+o+", "+s+", "+a+", "+i+`)) +
          depth3;
        `+ba(n)+`
      }
    `;var p=n.shapeInfo.flatOffset,f=n.shapeInfo.texShape,m=f[0],g=f[1];if(g===o&&p==null)return`
      float `+r+`(int row, int col, int depth, int depth2, int depth3) {
        int texR = row;
        float texC = dot(vec4(col, depth, depth2, depth3),
                         vec4(`+s+", "+a+", "+i+`, 1));
        vec2 uv = (vec2(texC, texR) + halfCR) /
                   vec2(`+g+".0, "+m+`.0);
        return sampleTexture(`+e+`, uv);
      }
    `;if(g===i&&p==null)return`
      float `+r+`(int row, int col, int depth, int depth2, int depth3) {
        float texR = dot(
          vec4(row, col, depth, depth2),
          vec4(`+t[1]*t[2]*t[3]+`,
               `+t[2]*t[3]+", "+t[3]+`, 1));
        int texC = depth3;
        vec2 uv = (vec2(texC, texR) + halfCR) /
                  vec2(`+g+".0, "+m+`.0);
        return sampleTexture(`+e+`, uv);
      }
    `;var y=Ci(e);return`
    float `+r+`(int row, int col, int depth, int depth2, int depth3) {
      // Explicitly use integer operations as dot() only works on floats.
      int index = row * `+o+" + col * "+s+" + depth * "+a+` +
          depth2 * `+i+" + depth3 + "+y+`;
      vec2 uv = uvFromFlat(`+m+", "+g+`, index);
      return sampleTexture(`+e+`, uv);
    }
  `}function AB(n){var t=n.shapeInfo.logicalShape,e=n.name,r="get"+e.charAt(0).toUpperCase()+e.slice(1),i=_.util.squeezeShape(t),a=i.newShape,s=i.keptDims;if(a.length<t.length){var o=xa(n,a),c=["row","col","depth","depth2","depth3","depth4"];return`
      `+wa(o)+`
      float `+r+`(int row, int col, int depth,
                    int depth2, int depth3, int depth4) {
        return `+r+"("+Sa(c,s)+`);
      }
    `}var l=t[5],u=t[4]*l,h=t[3]*u,d=t[2]*h,p=t[1]*d;if(n.shapeInfo.isUniform)return`
      float `+r+`(int row, int col, int depth,
                  int depth2, int depth3, int depth4) {
        int index = round(dot(
          vec4(row, col, depth, depth2),
          vec4(`+p+", "+d+", "+h+", "+u+`)) +
          dot(
            vec2(depth3, depth4),
            vec2(`+l+`, 1)));
        `+ba(n)+`
      }
    `;var f=n.shapeInfo.flatOffset,m=n.shapeInfo.texShape,g=m[0],y=m[1];if(y===p&&f==null)return`
      float `+r+`(int row, int col, int depth,
                    int depth2, int depth3, int depth4) {
        int texR = row;
        float texC = dot(vec4(col, depth, depth2, depth3),
          vec4(`+d+", "+h+", "+u+", "+l+`)) +
               float(depth4);
        vec2 uv = (vec2(texC, texR) + halfCR) /
                   vec2(`+y+".0, "+g+`.0);
        return sampleTexture(`+e+`, uv);
      }
    `;if(y===l&&f==null)return`
      float `+r+`(int row, int col, int depth,
                    int depth2, int depth3, int depth4) {
        float texR = dot(vec4(row, col, depth, depth2),
          vec4(`+t[1]*t[2]*t[3]*t[4]+`,
               `+t[2]*t[3]*t[4]+`,
               `+t[3]*t[4]+`,
               `+t[4]+`)) + float(depth3);
        int texC = depth4;
        vec2 uv = (vec2(texC, texR) + halfCR) /
                  vec2(`+y+".0, "+g+`.0);
        return sampleTexture(`+e+`, uv);
      }
    `;var w=Ci(e);return`
    float `+r+`(int row, int col, int depth,
                  int depth2, int depth3, int depth4) {
      // Explicitly use integer operations as dot() only works on floats.
      int index = row * `+p+" + col * "+d+" + depth * "+h+` +
          depth2 * `+u+" + depth3 * "+l+" + depth4 + "+w+`;
      vec2 uv = uvFromFlat(`+g+", "+y+`, index);
      return sampleTexture(`+e+`, uv);
    }
  `}function ba(n){var t=n.name,e=_.util.sizeFromShape(n.shapeInfo.logicalShape);return e<2?"return "+t+";":`
    for (int i = 0; i < `+e+`; i++) {
      if (i == index) {
        return `+t+`[i];
      }
    }
  `}function OB(n,t){var e=n.name,r=e.charAt(0).toUpperCase()+e.slice(1),i="get"+r+"AtOutCoords",a=n.shapeInfo.logicalShape.length,s=t.logicalShape.length,o=p2(n.shapeInfo.logicalShape,t.logicalShape),c=Ze(s),l=s-a,u,h=["x","y","z","w","u","v"];a===0?u="":s<2&&o.length>=1?u="coords = 0;":u=o.map(function(S){return"coords."+h[S+l]+" = 0;"}).join(`
`);var d="";s<2&&a>0?d="coords":d=n.shapeInfo.logicalShape.map(function(S,x){return"coords."+h[x+l]}).join(", ");var p="return outputValue;",f=_.util.sizeFromShape(n.shapeInfo.logicalShape),m=f===1,g=_.util.sizeFromShape(t.logicalShape),y=g===1;if(a===1&&!m&&!y)p=`
      return vec4(outputValue.xy, outputValue.xy);
    `;else if(m&&!y)s===1?p=`
        return vec4(outputValue.x, outputValue.x, 0., 0.);
      `:p=`
        return vec4(outputValue.x);
      `;else if(o.length){var w=a-2,b=a-1;o.indexOf(w)>-1&&o.indexOf(b)>-1?p="return vec4(outputValue.x);":o.indexOf(w)>-1?p="return vec4(outputValue.x, outputValue.y, outputValue.x, outputValue.y);":o.indexOf(b)>-1&&(p="return vec4(outputValue.xx, outputValue.zz);")}return`
    vec4 `+i+`() {
      `+c+` coords = getOutputCoords();
      `+u+`
      vec4 outputValue = get`+r+"("+d+`);
      `+p+`
    }
  `}function EB(n,t){var e=n.name,r=e.charAt(0).toUpperCase()+e.slice(1),i="get"+r+"AtOutCoords",a=t.texShape,s=n.shapeInfo.texShape,o=n.shapeInfo.logicalShape.length,c=t.logicalShape.length;if(!n.shapeInfo.isUniform&&o===c&&n.shapeInfo.flatOffset==null&&_.util.arraysEqual(s,a))return`
      float `+i+`() {
        return sampleTexture(`+e+`, resultUV);
      }
    `;var l=Ze(c),u=p2(n.shapeInfo.logicalShape,t.logicalShape),h=c-o,d,p=["x","y","z","w","u","v"];o===0?d="":c<2&&u.length>=1?d="coords = 0;":d=u.map(function(m){return"coords."+p[m+h]+" = 0;"}).join(`
`);var f="";return c<2&&o>0?f="coords":f=n.shapeInfo.logicalShape.map(function(m,g){return"coords."+p[g+h]}).join(", "),`
    float `+i+`() {
      `+l+` coords = getOutputCoords();
      `+d+`
      return get`+r+"("+f+`);
    }
  `}function Ze(n){if(n<=1)return"int";if(n===2)return"ivec2";if(n===3)return"ivec3";if(n===4)return"ivec4";if(n===5)return"ivec5";if(n===6)return"ivec6";throw Error("GPU for rank "+n+" is not yet supported")}function xa(n,t){var e=JSON.parse(JSON.stringify(n));return e.shapeInfo.logicalShape=t,e}function Sa(n,t){return t.map(function(e){return n[e]}).join(", ")}var YB=function(){function n(t,e,r,i){this.variableNames=["A"],this.packedInputs=!0,this.packedOutput=!0,_.util.assert(t.length>2,function(){return"Packed arg"+(r.charAt(0).toUpperCase()+r.slice(1))+" supports only inputs with rank above 2."});var a=t[t.length-1],s=Math.ceil(a/e);this.outputShape=t.slice(0,-1),s>1&&this.outputShape.push(s),i||this.variableNames.push("bestIndicesA");var o=this.outputShape,c=o.length,l=Ze(c),u=Mt("coords",c),h,d;if(s===1){d=c+1;var p=Ze(d);h=`
        `+p+" sourceLocR = "+p+"("+u.join()+`, 0);
        ++`+u[c-1]+`;
        `+p+" sourceLocG = "+p+"("+u.join()+`, 0);
        ++`+u[c-2]+`;
        `+p+" sourceLocA = "+p+"("+u.join()+`, 0);
        --`+u[c-1]+`;
        `+p+" sourceLocB = "+p+"("+u.join()+`, 0);
        --`+u[c-2]+";"}else d=c,h=`
        `+l+` sourceLocR = coords;
        ++`+u[c-1]+`;
        `+l+` sourceLocG = coords;
        ++`+u[c-2]+`;
        `+l+` sourceLocA = coords;
        --`+u[c-1]+`;
        `+l+` sourceLocB = coords;
        --`+u[c-2]+";";var f=["x","y","z","w","u","v"].slice(0,d),m="."+f[d-1],g=f.map(function(O){return"int "+O}),y=Mt("sourceLocR",d-1).concat("inIdx.r"),w=Mt("sourceLocG",d-1).concat("inIdx.g"),b=Mt("sourceLocB",d-1).concat("inIdx.b"),S=Mt("sourceLocA",d-1).concat("inIdx.a"),x=r==="max"?"greaterThan":"lessThan",N=i?"":`
          inIdx = round(vec4(getBestIndicesAChannel(`+y.join()+`),
                             getBestIndicesAChannel(`+w.join()+`),
                             getBestIndicesAChannel(`+b.join()+`),
                             getBestIndicesAChannel(`+S.join()+")));",I=`vec4(
            getAChannel(`+y.join()+`),
            hasNextCol ? getAChannel(`+w.join()+`) : 0.,
            hasNextRow ? getAChannel(`+b.join()+`) : 0.,
            hasNextRow && hasNextCol ? getAChannel(`+S.join()+") : 0.)",C=i?"":`
      float getBestIndicesAChannel(`+g.join()+`) {
        return getChannel(getBestIndicesA(`+f.join()+`),
                                          vec2(`+f.slice(-2).join()+`));
      }`;this.userCode=`
      float getAChannel(`+g.join()+`) {
        return getChannel(getA(`+f.join()+`),
                               vec2(`+f.slice(-2).join()+`));
      }
      `+C+`
      void main() {
        `+l+` coords = getOutputCoords();
        bool hasNextCol = `+u[c-1]+" < "+(o[c-1]-1)+`;
        bool hasNextRow = `+u[c-2]+" < "+(o[c-2]-1)+`;
        `+h+`
        ivec4 srcIdx = ivec4(sourceLocR`+m+", sourceLocG"+m+`,
          sourceLocB`+m+", sourceLocA"+m+") * "+e+`;
        ivec4 inIdx = srcIdx;
        vec4 bestIndex = vec4(inIdx);
        vec4 bestValue = `+I+`;

        for (int i = 0; i < `+e+`; i++) {
          inIdx = srcIdx;
          `+N+`
          vec4 candidate = `+I+`;
          bvec4 nan = isnan(candidate);
          bvec4 replace = bvec4(
            vec4(`+x+`(candidate, bestValue)) * (vec4(1.0) - vec4(nan)));

          bestValue = vec4(replace.x  ? candidate.x : bestValue.x,
                           replace.y  ? candidate.y : bestValue.y,
                           replace.z  ? candidate.z : bestValue.z,
                           replace.w  ? candidate.w : bestValue.w);
          bestIndex = mix(bestIndex, vec4(inIdx), vec4(replace));
          srcIdx++;
        }
        setOutput(bestIndex);
      }
    `}return n}();var jB=function(){function n(t){this.variableNames=["dy"],this.outputShape=t.inShape;var e=t.filterHeight,r=t.filterWidth,i=t.strideHeight,a=t.strideWidth,s=t.dilationHeight,o=t.dilationWidth,c=t.effectiveFilterHeight,l=t.effectiveFilterWidth,u=c-1-t.padInfo.top,h=l-1-t.padInfo.left,d=1/(e*r);this.userCode=`
      const ivec2 pads = ivec2(`+u+", "+h+`);
      const float avgMultiplier = float(`+d+`);

      void main() {
        ivec4 coords = getOutputCoords();
        int b = coords[0];
        int d = coords[3];

        ivec2 dyRCCorner = coords.yz - pads;
        int dyRCorner = dyRCCorner.x;
        int dyCCorner = dyRCCorner.y;

        // Convolve dy(?, ?, d) with pos mask(:, :, d) to get dx(xR, xC, d).
        // ? = to be determined. : = across all values in that axis.
        float dotProd = 0.0;
        for (int wR = 0; wR < `+c+`;
            wR += `+s+`) {
          float dyR = float(dyRCorner + wR) / `+i+`.0;

          if (dyR < 0.0 || dyR >= `+t.outHeight+`.0 || fract(dyR) > 0.0) {
            continue;
          }
          int idyR = int(dyR);

          for (int wC = 0; wC < `+l+`;
            wC+= `+o+`) {
            float dyC = float(dyCCorner + wC) / `+a+`.0;

            if (dyC < 0.0 || dyC >= `+t.outWidth+`.0 ||
                fract(dyC) > 0.0) {
              continue;
            }
            int idyC = int(dyC);

            float dyValue = getDy(b, idyR, idyC, d);

            dotProd += dyValue * avgMultiplier;
          }
        }
        setOutput(dotProd);
      }
    `}return n}(),KB=function(){function n(t){this.variableNames=["dy"],this.outputShape=t.inShape;var e=t.filterDepth,r=t.filterHeight,i=t.filterWidth,a=t.strideDepth,s=t.strideHeight,o=t.strideWidth,c=t.dilationDepth,l=t.dilationHeight,u=t.dilationWidth,h=t.effectiveFilterDepth,d=t.effectiveFilterHeight,p=t.effectiveFilterWidth,f=h-1-t.padInfo.front,m=d-1-t.padInfo.top,g=p-1-t.padInfo.left,y=1/(e*r*i);this.userCode=`
      const ivec3 pads = ivec3(`+f+", "+m+", "+g+`);
      const float avgMultiplier = float(`+y+`);

      void main() {
        ivec5 coords = getOutputCoords();
        int batch = coords.x;
        int ch = coords.u;

        ivec3 dyCorner = ivec3(coords.y, coords.z, coords.w) - pads;
        int dyDCorner = dyCorner.x;
        int dyRCorner = dyCorner.y;
        int dyCCorner = dyCorner.z;

        // Convolve dy(?, ?, ?, d) with pos mask(:, :, :, ch) to get
        // dx(xD, xR, xC, ch).
        // ? = to be determined. : = across all values in that axis.
        float dotProd = 0.0;

        for (int wD = 0; wD < `+h+`;
            wD += `+c+`) {
          float dyD = float(dyDCorner + wD) / `+a+`.0;

          if (dyD < 0.0 || dyD >= `+t.outDepth+`.0 || fract(dyD) > 0.0) {
            continue;
          }
          int idyD = int(dyD);

          for (int wR = 0; wR < `+d+`;
              wR += `+l+`) {
            float dyR = float(dyRCorner + wR) / `+s+`.0;

            if (dyR < 0.0 || dyR >= `+t.outHeight+`.0 ||
                fract(dyR) > 0.0) {
              continue;
            }
            int idyR = int(dyR);

            for (int wC = 0; wC < `+p+`;
                wC += `+u+`) {
              float dyC = float(dyCCorner + wC) / `+o+`.0;

              if (dyC < 0.0 || dyC >= `+t.outWidth+`.0 ||
                  fract(dyC) > 0.0) {
                continue;
              }
              int idyC = int(dyC);

              float dyValue = getDy(batch, idyD, idyR, idyC, ch);

              dotProd += dyValue * avgMultiplier;
            }
          }
        }
        setOutput(dotProd);
      }
    `}return n}();var g2=`
  if (isnan(a)) return a;
  if (isnan(b)) return b;
`,$B=`
  float s = sign(a) * sign(b);
  int ia = round(a);
  int ib = round(b);
  if (ib != 0) {
    // Windows (D3D) wants guaranteed non-zero int division at compile-time.
    return float(idiv(ia, ib, s));
  } else {
    return NAN;
  }
`,XB=`
if(a < 0.0 && floor(b) < b){
  return NAN;
}
if (b == 0.0) {
  return 1.0;
}
return (round(mod(b, 2.0)) != 1) ?
    pow(abs(a), b) : sign(a) * pow(abs(a), b);
`,JB="return float(a == b);",ZB="return float(a < b);",QB="return float(a <= b);",ez="return float(a > b);",tz="return float(a >= b);",nz="return float(a >= 1.0 && b >= 1.0);",rz="return float(a >= 1.0 || b >= 1.0);",iz=g2+`
  return max(a, b);
`,az=g2+`
  return min(a, b);
`,sz=`if (b == 0.0) return NAN;
  return mod(a, b);`,oz="return (b >= 1.0) ? a : a * (b + 1.0);",y2="return (a < 0.) ? b * a : a;",Bt=function(){function n(t,e,r){this.variableNames=["A","B"],this.outputShape=_.backend_util.assertAndGetBroadcastShape(e,r),this.userCode=`
      float binaryOperation(float a, float b) {
        `+t+`
      }

      void main() {
        float a = getAAtOutCoords();
        float b = getBAtOutCoords();
        setOutput(binaryOperation(a, b));
      }
    `}return n}();var Sc=`
  result.r = isNaN.r > 0. ? NAN : result.r;
  result.g = isNaN.g > 0. ? NAN : result.g;
  result.b = isNaN.b > 0. ? NAN : result.b;
  result.a = isNaN.a > 0. ? NAN : result.a;
`,cz=`
  ivec4 ia = round(a);
  ivec4 ib = round(b);
  bvec4 cond = notEqual(ib, ivec4(0));
  ivec4 result = ivec4(0);
  vec4 s = sign(a) * sign(b);

  // Windows (D3D) wants guaranteed non-zero int division at compile-time.
  if (cond[0]) {
    result[0] = idiv(ia[0], ib[0], s[0]);
  }
  if (cond[1]) {
    result[1] = idiv(ia[1], ib[1], s[1]);
  }
  if (cond[2]) {
    result[2] = idiv(ia[2], ib[2], s[2]);
  }
  if (cond[3]) {
    result[3] = idiv(ia[3], ib[3], s[3]);
  }
  return vec4(result);
`,lz=`
  // isModRound1 has 1 for components with round(mod(b, 2.0)) == 1, 0 otherwise.
  vec4 isModRound1 = vec4(equal(round(mod(b, 2.0)), ivec4(1)));
  vec4 multiplier = sign(a) * isModRound1 + (vec4(1.0) - isModRound1);
  vec4 result = multiplier * pow(abs(a), b);

  // Ensure that a^0 = 1, including 0^0 = 1 as this correspond to TF and JS
  bvec4 isExpZero = equal(b, vec4(0.0));
  result.r = isExpZero.r ? 1.0 : result.r;
  result.g = isExpZero.g ? 1.0 : result.g;
  result.b = isExpZero.b ? 1.0 : result.b;
  result.a = isExpZero.a ? 1.0 : result.a;

  vec4 isNaN = vec4(lessThan(a, vec4(0.0))) * vec4(lessThan(floor(b), b));
  `+Sc+`
  return result;
`,v2=`
  vec4 aLessThanZero = vec4(lessThan(a, vec4(0.)));
  return (aLessThanZero * (b * a)) + ((vec4(1.0) - aLessThanZero) * a);
`,uz=`
  vec4 bGTEZero = vec4(greaterThanEqual(b, vec4(0.)));
  return (bGTEZero * a) + ((vec4(1.0) - bGTEZero) * (a * (b + vec4(1.0))));
`,hz=`
  return vec4(equal(a, b));
`,dz=`
  return vec4(lessThan(a, b));
`,pz=`
  return vec4(lessThanEqual(a, b));
`,fz=`
  return vec4(greaterThan(a, b));
`,mz=`
  return vec4(greaterThanEqual(a, b));
`,gz=`
  return vec4(
    vec4(greaterThanEqual(a, vec4(1.0))) *
    vec4(greaterThanEqual(b, vec4(1.0))));
`,yz=`
  return min(
    vec4(greaterThanEqual(a, vec4(1.0))) +
    vec4(greaterThanEqual(b, vec4(1.0))),
    vec4(1.0));
`,vz=`
  vec4 result = vec4(max(a, b));
  vec4 isNaN = min(vec4(isnan(a)) + vec4(isnan(b)), vec4(1.0));
  `+Sc+`
  return result;
`,wz=`
  vec4 result = vec4(min(a, b));
  vec4 isNaN = min(vec4(isnan(a)) + vec4(isnan(b)), vec4(1.0));
  `+Sc+`
  return result;
`,bz=`
  vec4 result = mod(a, b);
  vec4 isNaN = vec4(equal(b, vec4(0.0)));
  `+Sc+`
  return result;
`,hr=function(){function n(t,e,r,i){i===void 0&&(i=!1),this.variableNames=["A","B"],this.supportsBroadcasting=!0,this.packedInputs=!0,this.packedOutput=!0,this.outputShape=_.backend_util.assertAndGetBroadcastShape(e,r);var a=this.outputShape.length,s="";if(i)if(a===0||_.util.sizeFromShape(this.outputShape)===1)s=`
          result.y = 0.;
          result.z = 0.;
          result.w = 0.;
        `;else{var o=Ze(a);if(s=`
          `+o+` coords = getOutputCoords();
        `,a===1)s+=`
            result.y = (coords + 1) >= `+this.outputShape[0]+` ? 0. : result.y;
            result.z = 0.;
            result.w = 0.;
          `;else{var c=Mt("coords",a);s+=`
            bool nextRowOutOfBounds =
              (`+c[a-2]+" + 1) >= "+this.outputShape[a-2]+`;
            bool nextColOutOfBounds =
              (`+c[a-1]+" + 1) >= "+this.outputShape[a-1]+`;
            result.y = nextColOutOfBounds ? 0. : result.y;
            result.z = nextRowOutOfBounds ? 0. : result.z;
            result.w = nextColOutOfBounds || nextRowOutOfBounds ? 0. : result.w;
          `}}this.userCode=`
      vec4 binaryOperation(vec4 a, vec4 b) {
        `+t+`
      }

      void main() {
        vec4 a = getAAtOutCoords();
        vec4 b = getBAtOutCoords();

        vec4 result = binaryOperation(a, b);
        `+s+`

        setOutput(result);
      }
    `}return n}();var xz=function(){function n(t){this.variableNames=["A"],this.outputShape=t,this.userCode=`
      uniform float minVal;
      uniform float maxVal;

      void main() {
        float value = getAAtOutCoords();
        if (isnan(value)) {
          setOutput(value);
          return;
        }

        setOutput(clamp(value, minVal, maxVal));
      }
    `}return n.prototype.getCustomSetupFunc=function(t,e){var r=this;return function(i,a){r.minLoc==null&&(r.minLoc=i.getUniformLocationNoThrow(a,"minVal"),r.maxLoc=i.getUniformLocationNoThrow(a,"maxVal")),i.gl.uniform1f(r.minLoc,t),i.gl.uniform1f(r.maxLoc,e)}},n}();var Sz=function(){function n(t){this.variableNames=["A"],this.packedInputs=!0,this.packedOutput=!0,this.outputShape=t,this.userCode=`
      uniform float minVal;
      uniform float maxVal;

      void main() {
        vec4 value = getAAtOutCoords();

        if (any(isnan(value))) {
          setOutput(value);
          return;
        }

        setOutput(clamp(value, vec4(minVal), vec4(maxVal)));
      }
    `}return n.prototype.getCustomSetupFunc=function(t,e){var r=this;return function(i,a){r.minLoc==null&&(r.minLoc=i.getUniformLocationNoThrow(a,"minVal"),r.maxLoc=i.getUniformLocationNoThrow(a,"maxVal")),i.gl.uniform1f(r.minLoc,t),i.gl.uniform1f(r.maxLoc,e)}},n}();var Lz=function(){function n(t){this.variableNames=["real","imag"],this.outputShape=t,this.userCode=`
      void main() {
        float re = abs(getRealAtOutCoords());
        float im = abs(getImagAtOutCoords());
        float mx = max(re, im);

        // sadly the length function in glsl is not underflow-safe
        // (at least not on Intel GPUs). So the safe solution is
        // to ensure underflow-safety in all cases.
        setOutput(
          mx == 0.0 ? 0.0 : mx * length(vec2(1, min(re, im)/mx))
        );
      }
    `}return n}();var Iz=function(){function n(t){this.variableNames=["x","dy"],this.outputShape=t.filterShape;var e=t.strideHeight,r=t.strideWidth,i=t.padInfo.top,a=t.padInfo.left,s=t.dataFormat==="channelsLast";this.userCode=`
      void main() {
        ivec4 coords = getOutputCoords();
        int wR = coords.x;
        int wC = coords.y;
        int d1 = coords.z;
        int d2 = coords.w;

        // Convolve x(?, ?, d1) with dy(:, :, d2) to get dw(wR, wC, d1, d2).
        // ? = to be determined. : = across all values in that axis.
        float dotProd = 0.0;

        for (int b = 0; b < `+t.batchSize+`; b++) {
          for (int yR = 0; yR < `+t.outHeight+`; yR++) {
            int xR = wR + yR * `+e+" - "+i+`;

            if (xR < 0 || xR >= `+t.inHeight+`) {
              continue;
            }

            for (int yC = 0; yC < `+t.outWidth+`; yC++) {
              int xC = wC + yC * `+r+" - "+a+`;

              if (xC < 0 || xC >= `+t.inWidth+`) {
                continue;
              }

              if (`+s+`) {
                float dyValue = getDy(b, yR, yC, d2);
                float xValue = getX(b, xR, xC, d1);
                dotProd += (xValue * dyValue);
              } else {
                float dyValue = getDy(b, d2, yR, yC);
                float xValue = getX(b, d1, xR, xC);
                dotProd += (xValue * dyValue);
              }

            }
          }
        }
        setOutput(dotProd);
      }
    `}return n}(),Az=function(){function n(t){this.variableNames=["dy","W"],this.outputShape=t.inShape;var e=t.filterHeight,r=t.filterWidth,i=t.strideHeight,a=t.strideWidth,s=t.dataFormat==="channelsLast",o=e-1-t.padInfo.top,c=r-1-t.padInfo.left,l=s?1:2,u=s?2:3,h=s?3:1;this.userCode=`
      const ivec2 pads = ivec2(`+o+", "+c+`);

      void main() {
        ivec4 coords = getOutputCoords();
        int batch = coords[0];
        int d1 = coords[`+h+`];

        ivec2 dyCorner = ivec2(coords[`+l+"], coords["+u+`]) - pads;
        int dyRCorner = dyCorner.x;
        int dyCCorner = dyCorner.y;

        // Convolve dy(?, ?, d2) with w(:, :, d1, d2) to compute dx(xR, xC, d1).
        // ? = to be determined. : = across all values in that axis.
        float dotProd = 0.0;
        for (int wR = 0; wR < `+e+`; wR++) {
          float dyR = float(dyRCorner + wR) / `+i+`.0;

          if (dyR < 0.0 || dyR >= `+t.outHeight+`.0 || fract(dyR) > 0.0) {
            continue;
          }
          int idyR = int(dyR);

          int wRPerm = `+e+` - 1 - wR;

          for (int wC = 0; wC < `+r+`; wC++) {
            float dyC = float(dyCCorner + wC) / `+a+`.0;

            if (dyC < 0.0 || dyC >= `+t.outWidth+`.0 ||
                fract(dyC) > 0.0) {
              continue;
            }
            int idyC = int(dyC);

            int wCPerm = `+r+` - 1 - wC;

            for (int d2 = 0; d2 < `+t.outChannels+`; d2++) {

              if (`+s+`) {
                float xValue = getDy(batch, idyR, idyC, d2);
                float wValue = getW(wRPerm, wCPerm, d1, d2);
                dotProd += xValue * wValue;
              } else {
                float xValue = getDy(batch, d2, idyR, idyC);
                float wValue = getW(wRPerm, wCPerm, d1, d2);
                dotProd += xValue * wValue;
              }

            }
          }
        }
        setOutput(dotProd);
      }
    `}return n}(),Tz=function(){function n(t){this.variableNames=["x","dy"],this.outputShape=t.filterShape;var e=t.strideDepth,r=t.strideHeight,i=t.strideWidth,a=t.padInfo.front,s=t.padInfo.top,o=t.padInfo.left;this.userCode=`
      void main() {
        ivec5 coords = getOutputCoords();
        int wF = coords.x;
        int wR = coords.y;
        int wC = coords.z;
        int d1 = coords.w;
        int d2 = coords.u;

        float dotProd = 0.0;

        for (int b = 0; b < `+t.batchSize+`; b++) {
          for (int yF = 0; yF < `+t.outDepth+`; yF++) {
            int xF = wF + yF * `+e+" - "+a+`;

            if (xF < 0 || xF >= `+t.inDepth+`) {
              continue;
            }

            for (int yR = 0; yR < `+t.outHeight+`; yR++) {
              int xR = wR + yR * `+r+" - "+s+`;

              if (xR < 0 || xR >= `+t.inHeight+`) {
                continue;
              }

              for (int yC = 0; yC < `+t.outWidth+`; yC++) {
                int xC = wC + yC * `+i+" - "+o+`;

                if (xC < 0 || xC >= `+t.inWidth+`) {
                  continue;
                }

                float dyValue = getDy(b, yF, yR, yC, d2);
                float xValue = getX(b, xF, xR, xC, d1);
                dotProd += (xValue * dyValue);
              }
            }
          }
        }
        setOutput(dotProd);
      }
    `}return n}(),Nz=function(){function n(t){this.variableNames=["dy","W"],this.outputShape=t.inShape;var e=t.filterDepth,r=t.filterHeight,i=t.filterWidth,a=t.strideDepth,s=t.strideHeight,o=t.strideWidth,c=e-1-t.padInfo.front,l=r-1-t.padInfo.top,u=i-1-t.padInfo.left;this.userCode=`
      const ivec3 pads = ivec3(`+c+", "+l+", "+u+`);

      void main() {
        ivec5 coords = getOutputCoords();
        int batch = coords.x;
        int d1 = coords.u;


        ivec3 dyCorner = ivec3(coords.y, coords.z, coords.w) - pads;
        int dyFCorner = dyCorner.x;
        int dyRCorner = dyCorner.y;
        int dyCCorner = dyCorner.z;

        float dotProd = 0.0;
        for (int wF = 0; wF < `+e+`; wF++) {
          float dyF = float(dyFCorner + wF) / `+a+`.0;

          if (dyF < 0.0 || dyF >= `+t.outDepth+`.0 || fract(dyF) > 0.0) {
            continue;
          }
          int idyF = int(dyF);

          int wFPerm = `+e+` - 1 - wF;

          for (int wR = 0; wR < `+r+`; wR++) {
            float dyR = float(dyRCorner + wR) / `+s+`.0;

            if (dyR < 0.0 || dyR >= `+t.outHeight+`.0 ||
              fract(dyR) > 0.0) {
              continue;
            }
            int idyR = int(dyR);

            int wRPerm = `+r+` - 1 - wR;

            for (int wC = 0; wC < `+i+`; wC++) {
              float dyC = float(dyCCorner + wC) / `+o+`.0;

              if (dyC < 0.0 || dyC >= `+t.outWidth+`.0 ||
                  fract(dyC) > 0.0) {
                continue;
              }
              int idyC = int(dyC);

              int wCPerm = `+i+` - 1 - wC;

              for (int d2 = 0; d2 < `+t.outChannels+`; d2++) {
                float xValue = getDy(batch, idyF, idyR, idyC, d2);
                float wValue = getW(wFPerm, wRPerm, wCPerm, d1, d2);
                dotProd += xValue * wValue;
              }
            }
          }
        }
        setOutput(dotProd);
      }
    `}return n}();var _z=function(){function n(t){this.variableNames=["x","dy"],this.outputShape=t.filterShape;var e=t.strideHeight,r=t.strideWidth,i=t.padInfo.top,a=t.padInfo.left,s=t.outChannels/t.inChannels;this.userCode=`
      void main() {
        ivec4 coords = getOutputCoords();
        int wR = coords.x;
        int wC = coords.y;
        int d1 = coords.z;
        int dm = coords.w;
        int d2 = d1 * `+s+` + dm;

        float dotProd = 0.0;

        // TO DO: Vec4 over the batch size
        for (int b = 0; b < `+t.batchSize+`; b++) {
          for (int yR = 0; yR < `+t.outHeight+`; yR++) {
            int xR = wR + yR * `+e+" - "+i+`;

            if (xR < 0 || xR >= `+t.inHeight+`) {
              continue;
            }

            for (int yC = 0; yC < `+t.outWidth+`; yC++) {
              int xC = wC + yC * `+r+" - "+a+`;

              if (xC < 0 || xC >= `+t.inWidth+`) {
                continue;
              }

              float dyValue = getDy(b, yR, yC, d2);
              float xValue = getX(b, xR, xC, d1);
              dotProd += (xValue * dyValue);
            }
          }
        }
        setOutput(dotProd);
      }
    `}return n}(),Cz=function(){function n(t){this.variableNames=["dy","W"],this.outputShape=t.inShape;var e=t.filterHeight,r=t.filterWidth,i=t.strideHeight,a=t.strideWidth,s=e-1-t.padInfo.top,o=r-1-t.padInfo.left,c=t.outChannels/t.inChannels;this.userCode=`
      const ivec2 pads = ivec2(`+s+", "+o+`);

      void main() {
        ivec4 coords = getOutputCoords();
        int batch = coords[0];
        int d1 = coords[3];
        ivec2 dyCorner = coords.yz - pads;
        int dyRCorner = dyCorner.x;
        int dyCCorner = dyCorner.y;

        float dotProd = 0.0;

        for (int wR = 0; wR < `+e+`; wR++) {
          float dyR = float(dyRCorner + wR) / `+i+`.0;

          if (dyR < 0.0 || dyR >= `+t.outHeight+`.0 || fract(dyR) > 0.0) {
            continue;
          }
          int idyR = int(dyR);

          int wRPerm = `+e+` - 1 - wR;

          for (int wC = 0; wC < `+r+`; wC++) {
            float dyC = float(dyCCorner + wC) / `+a+`.0;

            if (dyC < 0.0 || dyC >= `+t.outWidth+`.0 ||
                fract(dyC) > 0.0) {
              continue;
            }
            int idyC = int(dyC);

            int wCPerm = `+r+` - 1 - wC;

            // TO DO: Vec4 over the channelMul
            for (int dm = 0; dm < `+c+`; dm++) {
              int d2 = d1 * `+c+` + dm;
              float xValue = getDy(batch, idyR, idyC, d2);
              float wValue = getW(wRPerm, wCPerm, d1, dm);
              dotProd += xValue * wValue;
            }
          }
        }
        setOutput(dotProd);
      }
    `}return n}();var w2=function(){function n(t,e,r,i){e===void 0&&(e=!1),r===void 0&&(r=null),i===void 0&&(i=!1),this.variableNames=["x","W"],this.outputShape=t.outShape;var a=t.padInfo.top,s=t.padInfo.left,o=t.strideHeight,c=t.strideWidth,l=t.dilationHeight,u=t.dilationWidth,h=t.filterHeight,d=t.filterWidth,p=Math.floor(t.inChannels/4)*4,f=t.inChannels%4,m=t.dataFormat==="channelsLast",g=m?1:2,y=m?2:3,w=m?3:1,b="",S="";r&&(i?b=`float activation(float a) {
          float b = getPreluActivationWeightsAtOutCoords();
          `+r+`
        }`:b=`
          float activation(float x) {
            `+r+`
          }
        `,S="result = activation(result);");var x=e?"result += getBiasAtOutCoords();":"";e&&this.variableNames.push("bias"),i&&this.variableNames.push("preluActivationWeights"),this.userCode=`
      `+b+`

      const ivec2 strides = ivec2(`+o+", "+c+`);
      const ivec2 pads = ivec2(`+a+", "+s+`);

      void main() {
        ivec4 coords = getOutputCoords();
        int batch = coords[0];
        int d2 = coords[`+w+`];

        ivec2 xRCCorner =
            ivec2(coords[`+g+"], coords["+y+`]) * strides - pads;
        int xRCorner = xRCCorner.x;
        int xCCorner = xRCCorner.y;

        // Convolve x(?, ?, d1) with w(:, :, d1, d2) to get y(yR, yC, d2).
        // ? = to be determined. : = across all values in that axis.
        float dotProd = 0.0;
        for (int wR = 0; wR < `+h+`; wR++) {
          int xR = xRCorner + wR * `+l+`;

          if (xR < 0 || xR >= `+t.inHeight+`) {
            continue;
          }

          for (int wC = 0; wC < `+d+`; wC++) {
            int xC = xCCorner + wC * `+u+`;

            if (xC < 0 || xC >= `+t.inWidth+`) {
              continue;
            }

            for (int d1 = 0; d1 < `+p+`; d1 += 4) {
              vec4 wValues = vec4(
                getW(wR, wC, d1, d2),
                getW(wR, wC, d1 + 1, d2),
                getW(wR, wC, d1 + 2, d2),
                getW(wR, wC, d1 + 3, d2)
              );

              if (`+m+`) {
                vec4 xValues = vec4(
                  getX(batch, xR, xC, d1),
                  getX(batch, xR, xC, d1 + 1),
                  getX(batch, xR, xC, d1 + 2),
                  getX(batch, xR, xC, d1 + 3)
                );
                dotProd += dot(xValues, wValues);
              } else {
                vec4 xValues = vec4(
                  getX(batch, d1, xR, xC),
                  getX(batch, d1 + 1, xR, xC),
                  getX(batch, d1 + 2, xR, xC),
                  getX(batch, d1 + 3, xR, xC)
                );
                dotProd += dot(xValues, wValues);
              }
            }

            if (`+(f===1)+`) {

              if (`+m+`) {
                dotProd +=
                    getX(batch, xR, xC, `+p+`) *
                    getW(wR, wC, `+p+`, d2);
              } else {
                dotProd +=
                    getX(batch, `+p+`, xR, xC) *
                    getW(wR, wC, `+p+`, d2);
              }

            } else if (`+(f===2)+`) {
              vec2 wValues = vec2(
                getW(wR, wC, `+p+`, d2),
                getW(wR, wC, `+p+` + 1, d2)
              );

              if (`+m+`) {
                vec2 xValues = vec2(
                  getX(batch, xR, xC, `+p+`),
                  getX(batch, xR, xC, `+p+` + 1)
                );
                dotProd += dot(xValues, wValues);
              } else {
                vec2 xValues = vec2(
                  getX(batch, `+p+`, xR, xC),
                  getX(batch, `+p+` + 1, xR, xC)
                );
                dotProd += dot(xValues, wValues);
              }

            } else if (`+(f===3)+`) {
              vec3 wValues = vec3(
                getW(wR, wC, `+p+`, d2),
                getW(wR, wC, `+p+` + 1, d2),
                getW(wR, wC, `+p+` + 2, d2)
              );

              if (`+m+`) {
                vec3 xValues = vec3(
                  getX(batch, xR, xC, `+p+`),
                  getX(batch, xR, xC, `+p+` + 1),
                  getX(batch, xR, xC, `+p+` + 2)
                );
                dotProd += dot(xValues, wValues);
              } else {
                vec3 xValues = vec3(
                  getX(batch, `+p+`, xR, xC),
                  getX(batch, `+p+` + 1, xR, xC),
                  getX(batch, `+p+` + 2, xR, xC)
                );
                dotProd += dot(xValues, wValues);
              }

            }
          }
        }

        float result = dotProd;
        `+x+`
        `+S+`
        setOutput(result);
      }
    `}return n}(),Rz=function(){function n(t){this.variableNames=["x","W"],this.outputShape=t.outShape;var e=t.padInfo.front,r=t.padInfo.top,i=t.padInfo.left,a=t.strideDepth,s=t.strideHeight,o=t.strideWidth,c=t.dilationDepth,l=t.dilationHeight,u=t.dilationWidth,h=t.filterDepth,d=t.filterHeight,p=t.filterWidth,f=Math.floor(t.inChannels/4)*4,m=t.inChannels%4;this.userCode=`
      const ivec3 strides = ivec3(`+a+", "+s+", "+o+`);
      const ivec3 pads = ivec3(`+e+", "+r+", "+i+`);

      void main() {
        ivec5 coords = getOutputCoords();
        int batch = coords.x;
        int d2 = coords.u;

        ivec3 xFRCCorner = ivec3(coords.y, coords.z, coords.w) * strides - pads;
        int xFCorner = xFRCCorner.x;
        int xRCorner = xFRCCorner.y;
        int xCCorner = xFRCCorner.z;

        // Convolve x(?, ?, ?, d1) with w(:, :, :, d1, d2) to get
        // y(yF, yR, yC, d2). ? = to be determined. : = across all
        // values in that axis.
        float dotProd = 0.0;
        for (int wF = 0; wF < `+h+`; wF++) {
          int xF = xFCorner + wF * `+c+`;

          if (xF < 0 || xF >= `+t.inDepth+`) {
            continue;
          }

          for (int wR = 0; wR < `+d+`; wR++) {
            int xR = xRCorner + wR * `+l+`;

            if (xR < 0 || xR >= `+t.inHeight+`) {
              continue;
            }

            for (int wC = 0; wC < `+p+`; wC++) {
              int xC = xCCorner + wC * `+u+`;

              if (xC < 0 || xC >= `+t.inWidth+`) {
                continue;
              }

              for (int d1 = 0; d1 < `+f+`; d1 += 4) {
                vec4 xValues = vec4(
                  getX(batch, xF, xR, xC, d1),
                  getX(batch, xF, xR, xC, d1 + 1),
                  getX(batch, xF, xR, xC, d1 + 2),
                  getX(batch, xF, xR, xC, d1 + 3)
                );
                vec4 wValues = vec4(
                  getW(wF, wR, wC, d1, d2),
                  getW(wF, wR, wC, d1 + 1, d2),
                  getW(wF, wR, wC, d1 + 2, d2),
                  getW(wF, wR, wC, d1 + 3, d2)
                );

                dotProd += dot(xValues, wValues);
              }

              if (`+(m===1)+`) {
                dotProd +=
                  getX(batch, xF, xR, xC, `+f+`) *
                  getW(wF, wR, wC, `+f+`, d2);
              } else if (`+(m===2)+`) {
                vec2 xValues = vec2(
                  getX(batch, xF, xR, xC, `+f+`),
                  getX(batch, xF, xR, xC, `+f+` + 1)
                );
                vec2 wValues = vec2(
                  getW(wF, wR, wC, `+f+`, d2),
                  getW(wF, wR, wC, `+f+` + 1, d2)
                );
                dotProd += dot(xValues, wValues);
              } else if (`+(m===3)+`) {
                vec3 xValues = vec3(
                  getX(batch, xF, xR, xC, `+f+`),
                  getX(batch, xF, xR, xC, `+f+` + 1),
                  getX(batch, xF, xR, xC, `+f+` + 2)
                );
                vec3 wValues = vec3(
                  getW(wF, wR, wC, `+f+`, d2),
                  getW(wF, wR, wC, `+f+` + 1, d2),
                  getW(wF, wR, wC, `+f+` + 2, d2)
                );
                dotProd += dot(xValues, wValues);
              }
            }
          }
        }
        setOutput(dotProd);
      }
    `}return n}();var b2=function(){function n(t,e,r,i){e===void 0&&(e=!1),r===void 0&&(r=null),i===void 0&&(i=!1),this.variableNames=["x","W"],this.outputShape=t.outShape;var a=t.inHeight,s=t.inWidth,o=t.padInfo.top,c=t.padInfo.left,l=t.strideHeight,u=t.strideWidth,h=t.dilationHeight,d=t.dilationWidth,p=t.filterHeight,f=t.filterWidth,m=t.outChannels/t.inChannels,g="",y="";r&&(i?g=`float activation(float a) {
          float b = getPreluActivationWeightsAtOutCoords();
          `+r+`
        }`:g=`
          float activation(float x) {
            `+r+`
          }
        `,y="result = activation(result);");var w=e?"result += getBiasAtOutCoords();":"";e&&this.variableNames.push("bias"),i&&this.variableNames.push("preluActivationWeights"),this.userCode=`
      `+g+`

      const ivec2 strides = ivec2(`+l+", "+u+`);
      const ivec2 pads = ivec2(`+o+", "+c+`);

      void main() {
        ivec4 coords = getOutputCoords();
        int batch = coords.x;
        ivec2 xRCCorner = coords.yz * strides - pads;
        int d2 = coords.w;
        int d1 = d2 / `+m+`;
        int q = d2 - d1 * `+m+`;

        int xRCorner = xRCCorner.x;
        int xCCorner = xRCCorner.y;

        // Convolve x(?, ?, d1) with w(:, :, d1, q) to get y(yR, yC, d2).
        // ? = to be determined. : = across all values in that axis.
        float dotProd = 0.0;
        // TO DO(dsmilkov): Flatten the two for loops and vec4 the operations.
        for (int wR = 0; wR < `+p+`; wR++) {
          int xR = xRCorner + wR * `+h+`;

          if (xR < 0 || xR >= `+a+`) {
            continue;
          }

          for (int wC = 0; wC < `+f+`; wC++) {
            int xC = xCCorner + wC * `+d+`;

            if (xC < 0 || xC >= `+s+`) {
              continue;
            }

            float xVal = getX(batch, xR, xC, d1);
            float wVal = getW(wR, wC, d1, q);
            dotProd += xVal * wVal;
          }
        }

        float result = dotProd;
        `+w+`
        `+y+`
        setOutput(result);
      }
    `}return n}();var x2=function(){function n(t,e,r,i){e===void 0&&(e=!1),r===void 0&&(r=null),i===void 0&&(i=!1),this.variableNames=["x","W"],this.packedInputs=!0,this.packedOutput=!0,this.outputShape=t.outShape;for(var a=t.inHeight,s=t.inWidth,o=t.padInfo.top,c=t.padInfo.left,l=t.strideHeight,u=t.strideWidth,h=t.dilationHeight,d=t.dilationWidth,p=t.filterHeight,f=t.filterWidth,m=f,g="int xR; int xC; int xCOffset;",y=0;y<p;y++)for(var w=0;w<f;w++)g+=`
          vec4 xTexelR`+y+"C"+w*2+` = vec4(0.);
          vec4 wR`+y+"C"+w+` = vec4(0.);
          vec4 xR`+y+"C"+w+" = vec4(0.);";for(var y=0;y<p;y++)for(var b=0;b<m;b++){var w=b*2;if(g+=`
          xR = xRCorner + `+y*h+`;
          xC = xCCorner + `+w*d+`;
        `,u===1){if(w<f&&(c%2===1?g+=`
                xCOffset = xC + 1;
                if(xR >= 0 && xR < `+a+" && xCOffset >= 0 && xCOffset < "+s+`) {
                  xTexelR`+y+"C"+w+` = getX(batch, xR, xCOffset, d1);

                  // Need to manually clear unused channels in case
                  // we're reading from recycled texture.
                  if(xCOffset + 1 >= `+s+`) {
                    xTexelR`+y+"C"+w+`.zw = vec2(0.);
                  }
                } else {
                  xTexelR`+y+"C"+w+` = vec4(0.);
                }

                xCOffset = xC + 1 - 2;
                if(xR >= 0 && xR < `+a+" && xCOffset >= 0 && xCOffset < "+s+`) {
                  vec4 previous = getX(batch, xR, xCOffset, d1);

                  // Need to manually clear unused channels in case
                  // we're reading from recycled texture.
                  if(xCOffset + 1 >= `+s+`) {
                    previous.zw = vec2(0.);
                  }

                  xR`+y+"C"+w+" = vec4(previous.zw, xTexelR"+y+"C"+w+`.xy);
                } else {
                  xR`+y+"C"+w+" = vec4(0, 0, xTexelR"+y+"C"+w+`.xy);
                }
              `:g+=`
                if(xR >= 0 && xR < `+a+" && xC >= 0 && xC < "+s+`) {
                  xTexelR`+y+"C"+w+` = getX(batch, xR, xC, d1);
                } else {
                  xTexelR`+y+"C"+w+` = vec4(0.);
                }

                xR`+y+"C"+w+" = xTexelR"+y+"C"+w+`;
              `,w+1<f)){var S=c%2===0?_.util.nearestLargerEven(d):d;d%2===0&&c%2===1||d%2!==0&&c%2!==1?(g+=`
                  xCOffset = xC + `+c%2+" + "+S+`;

                  if(xR >= 0 && xR < `+a+` &&
                    xCOffset >= 0 && xCOffset < `+s+`) {
                    xTexelR`+y+"C"+(w+2)+` = getX(batch, xR, xCOffset, d1);
                  }
                `,d>1&&(g+=`
                    xCOffset -= 2;
                    if(xR >= 0 && xR < `+a+` &&
                      xCOffset >= 0 && xCOffset < `+s+`) {
                      xTexelR`+y+"C"+w+` = getX(batch, xR, xCOffset, d1);
                    } else {
                      xTexelR`+y+"C"+w+` = vec4(0.);
                    }
                  `),g+=`
                  xR`+y+"C"+(w+1)+` = vec4(
                    xTexelR`+y+"C"+w+".zw, xTexelR"+y+"C"+(w+2)+`.xy);
                `):g+=`
                  xCOffset = xC + `+S+`;

                  if(xR >= 0 && xR < `+a+` &&
                    xCOffset >= 0 && xCOffset < `+s+`) {
                    xTexelR`+y+"C"+(w+2)+` = getX(batch, xR, xCOffset, d1);
                  }

                  xR`+y+"C"+(w+1)+" = xTexelR"+y+"C"+(w+2)+`;
                `}}else w<f&&(g+=`
              if(xR >= 0 && xR < `+a+`) {
            `,c%2===1?(g+=`
                xCOffset = xC + 1 - `+u+`;
                if(xCOffset >= 0 && xCOffset < `+s+`) {
                  xTexelR`+y+"C"+w+` = getX(batch, xR, xCOffset, d1);
                } else {
                  xTexelR`+y+"C"+w+` = vec4(0.);
                }

                if(xC + 1 >= 0 && xC + 1 < `+s+`) {
                  xTexelR`+y+"C"+(w+2)+` = getX(batch, xR, xC + 1, d1);
                } else {
                  xTexelR`+y+"C"+(w+2)+` = vec4(0.);
                }

                xR`+y+"C"+w+` = vec4(
                  xTexelR`+y+"C"+w+".zw, xTexelR"+y+"C"+(w+2)+`.zw);
              `,w+1<f&&(g+=`
                  vec4 final = vec4(0.);
                  xCOffset = xC + 1 + `+u+`;
                  if(xCOffset >= 0 && xCOffset < `+s+`) {
                    final = getX(batch, xR, xCOffset, d1);
                  }
                  xR`+y+"C"+(w+1)+" = vec4(xTexelR"+y+"C"+(w+2)+`.xy, final.xy);
                `)):(g+=`
                if(xC >= 0 && xC < `+s+`) {
                  xTexelR`+y+"C"+w+` = getX(batch, xR, xC, d1);
                } else {
                  xTexelR`+y+"C"+w+` = vec4(0.);
                }

                xCOffset = xC + `+u+`;
                if(xCOffset >= 0 && xCOffset < `+s+`) {
                  xTexelR`+y+"C"+(w+2)+` = getX(batch, xR, xCOffset, d1);
                } else {
                  xTexelR`+y+"C"+(w+2)+` = vec4(0.);
                }

                xR`+y+"C"+w+` = vec4(
                  xTexelR`+y+"C"+w+".xy, xTexelR"+y+"C"+(w+2)+`.xy);
              `,w+1<f&&(g+=`
                  xR`+y+"C"+(w+1)+` = vec4(
                    xTexelR`+y+"C"+w+".zw, xTexelR"+y+"C"+(w+2)+`.zw);
                `)),g+="}");w<f&&(g+=`
            vec4 wTexelR`+y+"C"+w+" = getW("+y+", "+w+`, d1, q);
            wR`+y+"C"+w+" = vec4(wTexelR"+y+"C"+w+".xz, wTexelR"+y+"C"+w+`.xz);
          `,w+1<f&&(g+=`
              vec4 wTexelR`+y+"C"+(w+1)+" = getW("+y+", "+(w+1)+`, d1, q);
              wR`+y+"C"+(w+1)+` =
                vec4(wTexelR`+y+"C"+(w+1)+".xz, wTexelR"+y+"C"+(w+1)+".xz);"))}for(var y=0;y<p;y++)for(var w=0;w<f;w++)g+="dotProd += xR"+y+"C"+w+" * wR"+y+"C"+w+";";var x="",N="";r&&(i?x=`vec4 activation(vec4 a) {
          vec4 b = getPreluActivationWeightsAtOutCoords();
          `+r+`
        }`:x=`vec4 activation(vec4 x) {
          `+r+`
        }`,N="result = activation(result);");var I=e?"result += getBiasAtOutCoords();":"";e&&this.variableNames.push("bias"),i&&this.variableNames.push("preluActivationWeights"),this.userCode=`
      `+x+`

      const ivec2 strides = ivec2(`+l+", "+u+`);
      const ivec2 pads = ivec2(`+o+", "+c+`);

      void main() {

        ivec4 coords = getOutputCoords();
        int batch = coords.x;
        ivec2 xRCCorner = coords.yz * strides - pads;
        int d2 = coords.w;
        int d1 = d2;
        int q = 0;
        int xRCorner = xRCCorner.x;
        int xCCorner = xRCCorner.y;

        vec4 dotProd = vec4(0.);

        `+g+`

        vec4 result = dotProd;
        `+I+`
        `+N+`
        setOutput(result);
      }
    `}return n}();var Oz=function(){function n(t,e,r,i,a){this.variableNames=["Image","Boxes","BoxInd"],this.outputShape=[];var s=t[0],o=t[1],c=t[2],l=t[3],u=e[0],h=r[0],d=r[1];this.outputShape=[u,h,d,l];var p=i==="bilinear"?1:0,f=[o-1+".0",c-1+".0"],m=f[0],g=f[1],y=h>1?[""+(o-1)/(h-1),"(y2-y1) * height_ratio","y1*"+m+" + float(y)*(height_scale)"]:["0.0","0.0","0.5 * (y1+y2) * "+m],w=y[0],b=y[1],S=y[2],x=d>1?[""+(c-1)/(d-1),"(x2-x1) * width_ratio","x1*"+g+" + float(x)*(width_scale)"]:["0.0","0.0","0.5 * (x1+x2) * "+g],N=x[0],I=x[1],C=x[2];this.userCode=`
      const float height_ratio = float(`+w+`);
      const float width_ratio = float(`+N+`);
      void main() {
        ivec4 coords = getOutputCoords();
        int b = coords[0];
        int y = coords[1];
        int x = coords[2];
        int d = coords[3];

        // get box vals
        float y1 = getBoxes(b,0);
        float x1 = getBoxes(b,1);
        float y2 = getBoxes(b,2);
        float x2 = getBoxes(b,3);

        // get image in batch index
        int bInd = round(getBoxInd(b));
        if(bInd < 0 || bInd >= `+s+`) {
          return;
        }

        float height_scale = `+b+`;
        float width_scale = `+I+`;

        float in_y = `+S+`;
        if( in_y < 0.0 || in_y > `+m+` ) {
          setOutput(float(`+a+`));
          return;
        }
        float in_x = `+C+`;
        if( in_x < 0.0 || in_x > `+g+` ) {
          setOutput(float(`+a+`));
          return;
        }

        vec2 sourceFracIndexCR = vec2(in_x,in_y);
        if(`+p+` == 1) {
          // Compute the four integer indices.
          ivec2 sourceFloorCR = ivec2(sourceFracIndexCR);
          ivec2 sourceCeilCR = ivec2(ceil(sourceFracIndexCR));

          float topLeft = getImage(b, sourceFloorCR.y, sourceFloorCR.x, d);
          float bottomLeft = getImage(b, sourceCeilCR.y, sourceFloorCR.x, d);
          float topRight = getImage(b, sourceFloorCR.y, sourceCeilCR.x, d);
          float bottomRight = getImage(b, sourceCeilCR.y, sourceCeilCR.x, d);

          vec2 fracCR = sourceFracIndexCR - vec2(sourceFloorCR);

          float top = topLeft + (topRight - topLeft) * fracCR.x;
          float bottom = bottomLeft + (bottomRight - bottomLeft) * fracCR.x;
          float newValue = top + (bottom - top) * fracCR.y;
          setOutput(newValue);
        } else {
          // Compute the coordinators of nearest neighbor point.
          ivec2 sourceNearestCR = ivec2(floor(
            sourceFracIndexCR + vec2(0.5,0.5)));
          float newValue = getImage(b, sourceNearestCR.y, sourceNearestCR.x, d);
          setOutput(newValue);
        }
      }
    `}return n}(),I2=function(){function n(t,e,r){this.variableNames=["x"],this.outputShape=t;var i=t.length,a=e?"0.0":"getX("+S2(i,"coords")+")",s=t[t.length-1],o="",c="";e?(o=r?"end != "+(s-1):"end != 0",c=r?"end + 1":"end - 1"):(o=r?"end + pow2 < "+s:"end >= pow2",c=r?"end + pow2":"end - pow2"),this.userCode=`
      uniform float index;
      void main() {
        `+Ze(i)+` coords = getOutputCoords();
        int end = `+L2(i,"coords")+`;
        float val = `+a+`;
        int pow2 = int(pow(2.0, index));
        if (`+o+`) {
          int idx = `+c+`;
          `+L2(i,"coords")+` = idx;
          val += getX(`+S2(i,"coords")+`);
        }
        setOutput(val);
      }
    `}return n.prototype.getCustomSetupFunc=function(t){var e=this;return function(r,i){e.index==null&&(e.index=r.getUniformLocation(i,"index")),r.gl.uniform1f(e.index,t)}},n}();function S2(n,t){if(n===1)return""+t;if(n===2)return t+".x, "+t+".y";if(n===3)return t+".x, "+t+".y, "+t+".z";if(n===4)return t+".x, "+t+".y, "+t+".z, "+t+".w";throw Error("Cumulative sum for rank "+n+" is not yet supported")}function L2(n,t){if(n===1)return""+t;if(n===2)return t+".y";if(n===3)return t+".z";if(n===4)return t+".w";throw Error("Cumulative sum for rank "+n+" is not yet supported")}var Ez=function(){function n(t){this.variableNames=["A"],this.packedInputs=!1,this.packedOutput=!0,this.outPackingScheme=Is.DENSE;var e=Ts(t),r=Ht();this.outputShape=t,this.userCode=`
      ivec3 outCoordsFromFlatIndex(int index) {
        `+_i(["r","c","d"],t)+`
        return ivec3(r, c, d);
      }

      void main() {
        ivec2 resTexRC = ivec2(resultUV.yx *
          vec2(`+e[0]+", "+e[1]+`));
        int index = 4 * (resTexRC.x * `+e[1]+` + resTexRC.y);

        vec4 result = vec4(0.);

        for (int i=0; i<4; i++) {
          int flatIndex = index + i;
          ivec3 rc = outCoordsFromFlatIndex(flatIndex);
          result[i] = getA(rc.x, rc.y, rc.z);
        }

        `+r.output+` = result;
      }
    `}return n}();var Dz=function(){function n(t){this.variableNames=["A"],this.packedInputs=!0,this.packedOutput=!0,this.outPackingScheme=Is.DENSE;var e=Ts(t),r=Ht();this.outputShape=t,this.userCode=`
      ivec3 outCoordsFromFlatIndex(int index) {
        `+_i(["r","c","d"],t)+`
        return ivec3(r, c, d);
      }

      void main() {
        ivec2 resTexRC = ivec2(resultUV.yx *
          vec2(`+e[0]+", "+e[1]+`));
        int index = 4 * (resTexRC.x * `+e[1]+` + resTexRC.y);

        vec4 result = vec4(0.);

        for (int i=0; i<4; i++) {
          int flatIndex = index + i;
          ivec3 rc = outCoordsFromFlatIndex(flatIndex);
          result[i] = getChannel(getA(rc.x, rc.y, rc.z), vec2(rc.y, rc.z));
        }

        `+r.output+` = result;
      }
    `}return n}();var kz=function(){function n(t,e,r){this.variableNames=["x"],this.outputShape=[],this.outputShape=t,this.blockSize=e,this.dataFormat=r,this.userCode=`
    void main() {
      ivec4 coords = getOutputCoords();
      int b = coords[0];
      int h = `+this.getHeightCoordString()+`;
      int w = `+this.getWidthCoordString()+`;
      int d = `+this.getDepthCoordString()+`;

      int in_h = h / `+e+`;
      int offset_h = imod(h, `+e+`);
      int in_w = w / `+e+`;
      int offset_w = imod(w, `+e+`);
      int offset_d = (offset_h * `+e+` + offset_w) *
        `+this.getOutputDepthSize()+`;
      int in_d = d + offset_d;

      float result = `+this.getInputSamplingString()+`;
      setOutput(result);
    }
  `}return n.prototype.getHeightCoordString=function(){return this.dataFormat==="NHWC"?"coords[1]":"coords[2]"},n.prototype.getWidthCoordString=function(){return this.dataFormat==="NHWC"?"coords[2]":"coords[3]"},n.prototype.getDepthCoordString=function(){return this.dataFormat==="NHWC"?"coords[3]":"coords[1]"},n.prototype.getOutputDepthSize=function(){return this.dataFormat==="NHWC"?this.outputShape[3]:this.outputShape[1]},n.prototype.getInputSamplingString=function(){return this.dataFormat==="NHWC"?"getX(b, in_h, in_w, in_d)":"getX(b, in_d, in_h, in_w)"},n}();var Fz=function(){function n(t){this.variableNames=["X"],this.outputShape=[t,t],this.userCode=`
      void main() {
          ivec2 coords = getOutputCoords();
          float val = coords[0] == coords[1] ? getX(coords[0]) : 0.0;
          setOutput(val);
      }
    `}return n}();var Wz=function(){function n(t){this.variableNames=["A"],this.outTexUsage=hn.DOWNLOAD;var e=Ht();this.outputShape=t,this.userCode=`
      `+d2+`

      void main() {
        float x = getAAtOutCoords();
        `+e.output+` = encode_float(x);
      }
    `}return n}();var Uz=function(){function n(t){this.variableNames=["A"],this.packedInputs=!0,this.packedOutput=!1,this.outTexUsage=hn.DOWNLOAD;var e=Ht();this.outputShape=t,this.userCode=`
      `+d2+`

      void main() {
        ivec3 coords = getOutputCoords();
        float x = getChannel(getAAtOutCoords(), vec2(coords.y, coords.z));
        `+e.output+` = encode_float(x);
      }
    `}return n}();var Bz=function(){function n(t,e,r){r===void 0&&(r=!1),this.variableNames=["A"];var i=Ht(),a=e[0],s=e[1];this.outputShape=t;var o="result";r&&(o="floor(result * 255. + 0.5)"),this.userCode=`
      `+Ep(t)+`

      void main() {
        ivec3 coords = getOutputCoords();

        int flatIndex = getFlatIndex(coords);
        int offset = imod(flatIndex, 4);

        flatIndex = idiv(flatIndex, 4, 1.);

        int r = flatIndex / `+s+`;
        int c = imod(flatIndex, `+s+`);
        vec2 uv = (vec2(c, r) + halfCR) / vec2(`+s+".0, "+a+`.0);
        vec4 values = `+i.texture2D+`(A, uv);

        float result;

        if(offset == 0) {
          result = values[0];
        } else if(offset == 1) {
          result = values[1];
        } else if(offset == 2) {
          result = values[2];
        } else {
          result = values[3];
        }

        `+i.output+" = vec4("+o+`, 0., 0., 0.);
      }
    `}return n}();var zz=function(){function n(t,e,r){r===void 0&&(r=!1),this.variableNames=["A"],this.packedInputs=!1,this.packedOutput=!0;var i=Ht(),a=e[0],s=e[1];this.outputShape=t;var o="",c="result";r&&(c="floor(result * 255. + 0.5)");for(var l=0;l<=1;l++)for(var u=0;u<=1;u++){var h=l*2+u;o+=`
          localCoords = coords;
          if(localCoords[2] + `+u+" < "+t[2]+`) {
            localCoords[2] += `+u+`;
            if(localCoords[1] + `+l+" < "+t[1]+`) {
              localCoords[1] += `+l+`;

              flatIndex = getFlatIndex(localCoords);
              offset = imod(flatIndex, 4);

              flatIndex = idiv(flatIndex, 4, 1.);

              r = flatIndex / `+s+`;
              c = imod(flatIndex, `+s+`);
              uv = (vec2(c, r) + halfCR) / vec2(`+s+".0, "+a+`.0);
              values = `+i.texture2D+`(A, uv);

              if(offset == 0) {
                result[`+h+`] = values[0];
              } else if(offset == 1) {
                result[`+h+`] = values[1];
              } else if(offset == 2) {
                result[`+h+`] = values[2];
              } else {
                result[`+h+`] = values[3];
              }
            }
          }
        `}this.userCode=`
      `+Ep(t)+`

      void main() {
        ivec3 coords = getOutputCoords();

        vec4 result = vec4(0.);
        int flatIndex, r, c, offset;
        ivec3 localCoords;
        vec2 uv;
        vec4 values;

        `+o+`

        `+i.output+" = "+c+`;
      }
    `}return n}();var Pz=function(){function n(t,e){this.outputShape=[],this.variableNames=["x"],this.outputShape=t,this.userCode=`
      uniform float value;
      void main() {
        // Input can be obtained from uniform value.
        setOutput(value);
      }
    `}return n.prototype.getCustomSetupFunc=function(t){var e=this;return function(r,i){e.valueLoc==null&&(e.valueLoc=r.getUniformLocationNoThrow(i,"value")),r.gl.uniform1f(e.valueLoc,t)}},n}();var Hz=function(){function n(t,e,r){this.variableNames=["A","indices"];var i=t.slice();i[r]=e,this.outputShape=i,this.rank=i.length;var a=Ze(this.rank),s=Mz(t,r);this.userCode=`
      void main() {
        `+a+` resRC = getOutputCoords();
        setOutput(getA(`+s+`));
      }
    `}return n}();function Mz(n,t){var e=n.length;if(e>4)throw Error("Gather for rank "+e+" is not yet supported");if(e===1)return"int(getIndices(resRC))";for(var r=["resRC.x","resRC.y","resRC.z","resRC.w"],i=[],a=0;a<n.length;a++)a===t?i.push("int(getIndices("+r[a]+"))"):i.push(""+r[a]);return i.join()}var Vz=function(){function n(t,e,r){this.sliceDim=t,this.strides=e,this.variableNames=["x","indices"],this.outputShape=r;var i=Ze(e.length),a=Ze(r.length),s=this.sliceDim>1?"strides[j]":"strides";this.userCode=`
        `+i+" strides = "+i+"("+this.strides+`);
         void main() {
          `+a+` coords = getOutputCoords();
          int flattenIndex = 0;
          for (int j = 0; j < `+this.sliceDim+`; j++) {
            int index = round(getIndices(coords[0], j));
            flattenIndex += index * `+s+`;
          }
          setOutput(getX(flattenIndex, coords[1]));
        }
      `}return n}();function A2(n){var t=Ht(),e=t.version+`
    precision highp float;
    `+t.attribute+` vec3 clipSpacePos;
    `+t.attribute+` vec2 uv;
    `+t.varyingVs+` vec2 resultUV;

    void main() {
      gl_Position = vec4(clipSpacePos, 1);
      resultUV = uv;
    }`;return Vb(n,e)}function T2(n){var t=new Float32Array([-1,1,0,0,1,-1,-1,0,0,0,1,1,0,1,1,1,-1,0,1,0]);return jb(n,t)}function N2(n){var t=new Uint16Array([0,1,2,2,1,3]);return Kb(n,t)}function Rs(n,t,e,r,i,a){Xb(t,e);var s=$b(n),o=n.TEXTURE_2D;return de(n,function(){return n.bindTexture(o,s)}),de(n,function(){return n.texParameteri(o,n.TEXTURE_WRAP_S,n.CLAMP_TO_EDGE)}),de(n,function(){return n.texParameteri(o,n.TEXTURE_WRAP_T,n.CLAMP_TO_EDGE)}),de(n,function(){return n.texParameteri(o,n.TEXTURE_MIN_FILTER,n.NEAREST)}),de(n,function(){return n.texParameteri(o,n.TEXTURE_MAG_FILTER,n.NEAREST)}),de(n,function(){return n.texImage2D(o,0,r,t,e,0,i,a,null)}),de(n,function(){return n.bindTexture(n.TEXTURE_2D,null)}),s}function Dp(n){return n.internalFormatFloat}function _2(n,t,e,r){var i=As(t,e),a=i[0],s=i[1];return Rs(n,a,s,Dp(r),r.textureFormatFloat,n.FLOAT)}function kp(n){return n.internalFormatHalfFloat}function C2(n,t,e,r){var i=As(t,e),a=i[0],s=i[1];return Rs(n,a,s,kp(r),r.textureFormatFloat,r.textureTypeHalfFloat)}function Fp(n){return n.downloadTextureFormat}function R2(n,t,e,r){var i=As(t,e),a=i[0],s=i[1];return Rs(n,a,s,Fp(r),n.RGBA,n.UNSIGNED_BYTE)}function Wp(n){return n.internalFormatPackedFloat}function O2(n,t,e,r){var i=ga(t,e),a=i[0],s=i[1];return Rs(n,a,s,Wp(r),n.RGBA,n.FLOAT)}function Up(n){return n.internalFormatPackedHalfFloat}function E2(n,t,e,r){var i=ga(t,e),a=i[0],s=i[1];return Rs(n,a,s,Up(r),n.RGBA,r.textureTypeHalfFloat)}function D2(n,t,e){var r=0,i=3*4,a=3*4+2*4;de(n,function(){return n.bindBuffer(n.ARRAY_BUFFER,e)});var s=Tp(n,t,"clipSpacePos",e,3,a,r);return s&&Tp(n,t,"uv",e,2,a,i)}function k2(n,t,e,r,i,a){de(n,function(){return n.bindTexture(n.TEXTURE_2D,t)});var s,o,c;i instanceof Uint8Array?(s=new Uint8Array(e*r*4),o=n.UNSIGNED_BYTE,c=n.RGBA):(s=new Float32Array(e*r*4),o=n.FLOAT,c=a.internalFormatPackedFloat),s.set(i),de(n,function(){return n.texImage2D(n.TEXTURE_2D,0,c,e,r,0,n.RGBA,o,s)}),de(n,function(){return n.bindTexture(n.TEXTURE_2D,null)})}function F2(n,t,e){de(n,function(){return n.bindTexture(n.TEXTURE_2D,t)}),e.data instanceof Uint8Array?de(n,function(){return n.texImage2D(n.TEXTURE_2D,0,n.RGBA,e.width,e.height,0,n.RGBA,n.UNSIGNED_BYTE,e.data)}):de(n,function(){return n.texImage2D(n.TEXTURE_2D,0,n.RGBA,n.RGBA,n.UNSIGNED_BYTE,e)}),de(n,function(){return n.bindTexture(n.TEXTURE_2D,null)})}function W2(n,t,e,r){var i=n.createBuffer();de(n,function(){return n.bindBuffer(n.PIXEL_PACK_BUFFER,i)});var a=4,s=4,o=a*s*t*e;return de(n,function(){return n.bufferData(n.PIXEL_PACK_BUFFER,o,n.STREAM_READ)}),de(n,function(){return n.readPixels(0,0,e,t,n.RGBA,n.FLOAT,0)}),de(n,function(){return n.bindBuffer(n.PIXEL_PACK_BUFFER,null)}),i}function U2(n,t,e){var r=n,i=new Float32Array(e);return r.bindBuffer(r.PIXEL_PACK_BUFFER,t),r.getBufferSubData(r.PIXEL_PACK_BUFFER,0,i),r.bindBuffer(r.PIXEL_PACK_BUFFER,null),i}function B2(n,t,e,r){var i=As(t,e),a=i[0],s=i[1],o=4,c=new Uint8Array(wU(t*e,o));return de(n,function(){return n.readPixels(0,0,a,s,r.downloadTextureFormat,n.UNSIGNED_BYTE,c)}),new Float32Array(c.buffer)}function z2(n,t,e,r,i,a,s,o){var c=n,l=new Float32Array(bU(a,s));return c.bindBuffer(c.PIXEL_PACK_BUFFER,t),c.getBufferSubData(c.PIXEL_PACK_BUFFER,0,l),c.bindBuffer(c.PIXEL_PACK_BUFFER,null),l}function P2(n,t,e){var r=new Float32Array(t*e*4);return de(n,function(){return n.readPixels(0,0,e,t,n.RGBA,n.FLOAT,r)}),r}var qz={__proto__:null,createVertexShader:A2,createVertexBuffer:T2,createIndexBuffer:N2,getInternalFormatForFloat32MatrixTexture:Dp,createFloat32MatrixTexture:_2,getInternalFormatForFloat16MatrixTexture:kp,createFloat16MatrixTexture:C2,getInternalFormatForUnsignedBytesMatrixTexture:Fp,createUnsignedBytesMatrixTexture:R2,getInternalFormatForPackedMatrixTexture:Wp,createPackedMatrixTexture:O2,getInternalFormatForFloat16PackedMatrixTexture:Up,createFloat16PackedMatrixTexture:E2,bindVertexProgramAttributeStreams:D2,uploadDenseMatrixToTexture:k2,uploadPixelDataToTexture:F2,createBufferFromOutputTexture:W2,downloadFloat32MatrixFromBuffer:U2,downloadByteEncodedFloatMatrixFromOutputTexture:B2,
          blockIndex = rc.y + `+N+`;
          pos = rc.x + `+x+`;

          if(blockIndex < `+t[1]+" && pos < "+t[0]+`) {
            offsetY = int(blockIndex / (`+l+")) * "+o+" - "+f+`;
            d0 = offsetY + `+h+" * (pos / "+m+`);

            if(d0 < `+e[w]+` && d0 >= 0) {

              offsetX = int(mod(float(blockIndex), `+l+".) * "+s+". - "+p+`.);
              d1 = offsetX + `+u+" * (int(mod(float(pos), "+m+".) / "+a+`.));

              if(d1 < `+e[b]+` && d1 >= 0) {

                ch = int(mod(float(pos), `+a+`.));

                if (`+y+`) {
                  innerDims = vec2(d1, ch);
                  result[`+(x*2+N)+`] = getChannel(
                    getA(d0, int(innerDims.x),
                    int(innerDims.y)), innerDims);
                } else {
                  innerDims = vec2(d0, d1);
                  result[`+(x*2+N)+`] = getChannel(
                    getA(ch, int(innerDims.x),
                    int(innerDims.y)), innerDims);
                }
              }
            }
          }
        `;this.userCode=`
      void main() {
        ivec2 rc = getOutputCoords();

        vec4 result = vec4(0);

        int blockIndex, pos, offsetY, d0, offsetX, d1, ch;
        vec2 innerDims;

        `+S+`

        `+g.output+` = result;
      }
    `}return n}();var Xz=function(){function n(t,e,r,i,a){this.variableNames=["x"],this.outputShape=[];var s=e,o=t[3]-1;this.outputShape=t;var c,l="float("+r+") + float("+i+") * sum";a===.5?c="inversesqrt("+l+")":a===1?c="1.0/("+l+")":c="exp(log("+l+") * float(-"+a+"));",this.userCode=`
      void main() {
        ivec4 coords = getOutputCoords();
        int b = coords[0];
        int r = coords[1];
        int c = coords[2];
        int d = coords[3];
        float x = getX(b, r, c, d);
        float sum = 0.0;
        for (int j = -`+s+"; j <= "+s+`; j++) {
          int idx = d + j;
          if (idx >= 0 && idx <=  `+o+`) {
            float z = getX(b, r, c, idx);
            sum += z * z;
          }
        }
        float val = x * `+c+`;
        setOutput(val);
      }
    `}return n}();var Jz=function(){function n(t,e,r,i,a){this.variableNames=["inputImage","outputImage","dy"],this.outputShape=[],this.outputShape=t,this.depth=t[3],this.depthRadius=e,this.bias=r,this.alpha=i,this.beta=a,this.userCode=`
      void main() {
        ivec4 coords = getOutputCoords();
        int b = coords[0];
        int r = coords[1];
        int c = coords[2];

        float result = 0.0;
        for (int d = 0; d < `+this.depth+`; ++d) {
          int depthBegin = int(max(0.0, float(d - `+e+`)));
          int depthEnd = int(min(float(`+this.depth+`),
              float(d + `+e+` + 1)));

          const int MIN_DEPTH_BEGIN = 0;
          const int MAX_DEPTH_END = `+this.depth+`;

          float norm = 0.0;
          for (int k = MIN_DEPTH_BEGIN; k < MAX_DEPTH_END; ++k) {
            if (k < depthBegin){
              continue;
            }
            else if (k >= depthBegin && k < depthEnd) {
              norm += getInputImage(b, r, c, k) * getInputImage(b, r, c, k);
            }
            else {
              break;
            }
          }

          norm = float(`+i+") * norm + float("+r+`);

          for(int k = MIN_DEPTH_BEGIN; k < MAX_DEPTH_END; ++k){
            if (k < depthBegin){
              continue;
            }
            else if (k >= depthBegin && k < depthEnd){
              float dyi = -2.0 * float(`+i+`)
                * float(`+a+`)
                * getInputImage(b ,r ,c, k) * getOutputImage(b, r, c, d)
                / norm;
              if (k == d) {
                dyi += pow(norm, -1.0 * `+a+`);
              }
              if (k == coords[3]) {
                dyi *= getDy(b, r, c, d);
                result += dyi;
              }
            }
            else {
              break;
            }
          }
      }
      setOutput(result);
      }
    `}return n}();var Zz=function(){function n(t,e,r,i,a){this.variableNames=["x"],this.outputShape=[],this.packedInputs=!0,this.packedOutput=!0;var s=e,o=t[3]-1;this.outputShape=t;var c,l="float("+r+") + float("+i+") * sum";a===.5?c="inversesqrt("+l+")":a===1?c="1.0/("+l+")":c="exp(log("+l+") * float(-"+a+"));",this.userCode=`
      void main() {
        ivec4 coords = getOutputCoords();
        int b = coords.x;
        int r = coords.y;
        int c = coords.z;
        int d = coords.w;

        bool hasNextCol = d < `+this.outputShape[3]+`;
        bool hasNextRow = c < `+this.outputShape[2]+`;

        vec4 sum = vec4(0.);
        vec4 xFragAtOutputCoords = getX(b, r, c, d);

        vec4 xAtOutputCoords = vec4(
          getChannel(xFragAtOutputCoords, vec2(c, d)),
          hasNextCol ?
            getChannel(xFragAtOutputCoords, vec2(c, d + 1)) : 0.0,
          hasNextRow ?
            getChannel(xFragAtOutputCoords , vec2(c + 1, d)) : 0.0,
          (hasNextRow && hasNextCol) ?
            getChannel(xFragAtOutputCoords, vec2(c + 1, d + 1)) : 0.0
        );

        int firstChannel = d - `+s+`;
        vec2 cache = vec2(0.);
        if(firstChannel >= 0){
          vec4 firstChannelFrag = getX(b, r, c, firstChannel);
          cache.x = getChannel(firstChannelFrag, vec2(c, firstChannel));
            if(hasNextRow){
              cache.y = getChannel(firstChannelFrag, vec2(c + 1, firstChannel));
            }
        }

        ivec2 depth = ivec2(d, d + 1);
        for (int j = - `+s+"; j <= "+s+`; j++) {
          ivec2 idx = depth + j;
          bvec2 aboveLowerBound = greaterThanEqual(idx, ivec2(0));
          bvec2 belowUpperBound = lessThanEqual(idx, ivec2(`+o+`));

          bool depthInRange = aboveLowerBound.x && belowUpperBound.x;
          bool depthPlusOneInRange = aboveLowerBound.y && belowUpperBound.y;

          if(depthInRange || depthPlusOneInRange){
            vec4 z = vec4(0.);
            vec4 xFragAtCurrentDepth;
            z.xz = cache.xy;
            if(depthPlusOneInRange && hasNextCol){
              xFragAtCurrentDepth = idx.y != d ?
                getX(b, r, c, idx.y) : xFragAtOutputCoords;
              z.y = getChannel(xFragAtCurrentDepth, vec2(c, idx.y));
              if(hasNextRow){
                z.w = getChannel(xFragAtCurrentDepth, vec2(c + 1, idx.y));
              }
            }
            cache.xy = z.yw;
            sum += z * z;
          }
        }
        vec4 result = xAtOutputCoords * `+c+`;
        setOutput(result);
      }
    `}return n}();var Qz=function(){function n(t){this.variableNames=["dy","maxPos"],this.outputShape=t.inShape;var e=t.strideHeight,r=t.strideWidth,i=t.dilationHeight,a=t.effectiveFilterHeight,s=t.effectiveFilterWidth,o=a-1-t.padInfo.top,c=s-1-t.padInfo.left,l=a*s-1;this.userCode=`
      const ivec2 pads = ivec2(`+o+", "+c+`);

      void main() {
        ivec4 coords = getOutputCoords();
        int b = coords[0];
        int d = coords[3];

        ivec2 dyRCCorner = coords.yz - pads;
        int dyRCorner = dyRCCorner.x;
        int dyCCorner = dyRCCorner.y;

        // Convolve dy(?, ?, d) with pos mask(:, :, d) to get dx(xR, xC, d).
        // ? = to be determined. : = across all values in that axis.
        float dotProd = 0.0;
        for (int wR = 0; wR < `+a+`;
          wR += `+i+`) {
          float dyR = float(dyRCorner + wR) / `+e+`.0;

          if (dyR < 0.0 || dyR >= `+t.outHeight+`.0 || fract(dyR) > 0.0) {
            continue;
          }
          int idyR = int(dyR);

          for (int wC = 0; wC < `+s+`; wC++) {
            float dyC = float(dyCCorner + wC) / `+r+`.0;

            if (dyC < 0.0 || dyC >= `+t.outWidth+`.0 ||
                fract(dyC) > 0.0) {
              continue;
            }
            int idyC = int(dyC);

            float dyValue = getDy(b, idyR, idyC, d);
            int maxPosValue = `+l+` - int(getMaxPos(b, idyR, idyC, d));

            // Get the current value, check it against the value from the
            // position matrix.
            int curPosValue = wR * `+s+` + wC;
            float mask = float(maxPosValue == curPosValue ? 1.0 : 0.0);

            dotProd += dyValue * mask;
          }
        }
        setOutput(dotProd);
      }
    `}return n}(),eP=function(){function n(t){this.variableNames=["dy","maxPos"],this.outputShape=t.inShape;var e=t.strideDepth,r=t.strideHeight,i=t.strideWidth,a=t.dilationDepth,s=t.dilationHeight,o=t.dilationWidth,c=t.effectiveFilterDepth,l=t.effectiveFilterHeight,u=t.effectiveFilterWidth,h=c-1-t.padInfo.front,d=l-1-t.padInfo.top,p=u-1-t.padInfo.left,f=c*l*u-1;this.userCode=`
      const ivec3 pads = ivec3(`+h+", "+d+", "+p+`);

      void main() {
        ivec5 coords = getOutputCoords();
        int batch = coords.x;
        int ch = coords.u;

        ivec3 dyCorner = ivec3(coords.y, coords.z, coords.w) - pads;
        int dyDCorner = dyCorner.x;
        int dyRCorner = dyCorner.y;
        int dyCCorner = dyCorner.z;

        // Convolve dy(?, ?, ?, ch) with pos mask(:, :, :, d) to get
        // dx(xD, xR, xC, ch).
        // ? = to be determined. : = across all values in that axis.
        float dotProd = 0.0;

        for (int wD = 0; wD < `+c+`;
           wD += `+a+`) {
          float dyD = float(dyDCorner + wD) / `+e+`.0;

          if (dyD < 0.0 || dyD >= `+t.outDepth+`.0 || fract(dyD) > 0.0) {
            continue;
          }
          int idyD = int(dyD);

          for (int wR = 0; wR < `+l+`;
              wR += `+s+`) {
            float dyR = float(dyRCorner + wR) / `+r+`.0;

            if (dyR < 0.0 || dyR >= `+t.outHeight+`.0 ||
                fract(dyR) > 0.0) {
              continue;
            }
            int idyR = int(dyR);

            for (int wC = 0; wC < `+u+`;
                wC += `+o+`) {
              float dyC = float(dyCCorner + wC) / `+i+`.0;

              if (dyC < 0.0 || dyC >= `+t.outWidth+`.0 ||
                  fract(dyC) > 0.0) {
                continue;
              }
              int idyC = int(dyC);

              float dyValue = getDy(batch, idyD, idyR, idyC, ch);
              int maxPosValue = `+f+` -
                  int(getMaxPos(batch, idyD, idyR, idyC, ch));

              // Get the current value, check it against the value from the
              // position matrix.
              int curPosValue =
                  wD * `+l+" * "+u+` +
                  wR * `+u+` + wC;
              float mask = float(maxPosValue == curPosValue ? 1.0 : 0.0);

              dotProd += dyValue * mask;
            }
          }
        }
        setOutput(dotProd);
      }
    `}return n}();var Bp=function(){function n(t,e,r,i,a,s,o,c){i===void 0&&(i=!1),a===void 0&&(a=!1),s===void 0&&(s=!1),o===void 0&&(o=null),c===void 0&&(c=!1),this.variableNames=["matrixA","matrixB"],this.packedInputs=!0,this.packedOutput=!0,this.outputShape=r;var l=i?t[1]:t[2],u=Math.ceil(l/2),h=i?"i * 2, rc.y":"rc.y, i * 2",d=a?"rc.z, i * 2":"i * 2, rc.z",p=i?["a.xxyy","a.zzww"]:["a.xxzz","a.yyww"],f=a?["b.xzxz","b.ywyw"]:["b.xyxy","b.zwzw"],m="",g="";o&&(c?m=`vec4 activation(vec4 a) {
          vec4 b = getPreluActivationWeightsAtOutCoords();
          `+o+`
        }`:m=`vec4 activation(vec4 x) {
          `+o+`
        }`,g="result = activation(result);");var y=s?"result += getBiasAtOutCoords();":"";s&&this.variableNames.push("bias"),c&&this.variableNames.push("preluActivationWeights");var w="rc.x",b="rc.x";t[0]<e[0]?w="int(min(float(rc.x), "+(t[0]-1)+".))":e[0]<t[0]&&(b="int(min(float(rc.x), "+(e[0]-1)+".))"),this.userCode=`
      `+m+`

      const float sharedDimension = `+u+`.0;

      vec4 dot2x2ARowBCol(ivec3 rc) {
        vec4 result = vec4(0);
        for (int i = 0; i < `+u+`; i++) {
          int batchA = `+w+`;
          int batchB = `+b+`;
          vec4 a = getMatrixA(batchA, `+h+`);
          vec4 b = getMatrixB(batchB, `+d+`);

          // These swizzled products need to be separately added.
          // See: https://github.com/tensorflow/tfjs/issues/1735
          result += (`+p[0]+" * "+f[0]+`);
          result += (`+p[1]+" * "+f[1]+`);
        }
        return result;
      }

      void main() {
        ivec3 rc = getOutputCoords();
        vec4 result = dot2x2ARowBCol(rc);

        `+y+`

        `+g+`

        setOutput(result);
      }
    `}return n}();var tP=function(){function n(t,e,r){this.variableNames=["probs"],this.outputShape=[t,r],this.userCode=`
      uniform float seed;

      void main() {
        ivec2 coords = getOutputCoords();
        int batch = coords[0];

        float r = random(seed);
        float cdf = 0.0;

        for (int i = 0; i < `+(e-1)+`; i++) {
          cdf += getProbs(batch, i);

          if (r < cdf) {
            setOutput(float(i));
            return;
          }
        }

        // If no other event happened, last event happened.
        setOutput(float(`+(e-1)+`));
      }
    `}return n.prototype.getCustomSetupFunc=function(t){var e=this;return function(r,i){e.seedLoc==null&&(e.seedLoc=r.getUniformLocation(i,"seed")),r.gl.uniform1f(e.seedLoc,t)}},n}();var nP=function(){function n(t,e,r,i){this.variableNames=["indices"],this.outputShape=[t,e],this.userCode=`
      void main() {
        ivec2 coords = getOutputCoords();
        int index = round(getIndices(coords.x));
        setOutput(mix(float(`+i+"), float("+r+`),
                      float(index == coords.y)));
      }
    `}return n}();var sP=function(){function n(t){this.variableNames=["A"],this.packedInputs=!1,this.packedOutput=!0,this.outputShape=t;var e=t.length;if(e===0)this.userCode=`
        void main() {
          setOutput(vec4(getA(), 0., 0., 0.));
        }
      `;else{var r=Mt("rc",e),i=Ze(e),a=rP(e,t,r),s=iP(e,t[t.length-1],t[t.length-2],r),o=aP(t,r);this.userCode=`
        void main() {
          `+i+` rc = getOutputCoords();

          if(`+a+`) {
            setOutput(vec4(0));
          } else {
            `+s+`

            setOutput(vec4(`+o+`));
          }
        }
      `}}return n}();function oP(n,t){for(var e=[],r=0;r<=1;r++)for(var i=0;i<=1;i++){for(var a=(r===0?"r":"rp1")+", "+(i===0?"c":"cp1"),s=2;s<n;s++)a=t[t.length-1-s]+","+a;e.push(a)}return e}function rP(n,t,e){if(n===1)return"rc > "+t[0];for(var r="",i=n-2;i<n;i++)r+=e[i]+" >= "+t[i],i<n-1&&(r+="||");return r}function iP(n,t,e,r){if(n===1)return"";var i=r.slice(-2);return`
    int r = `+i[0]+`;
    int c = `+i[1]+`;
    int rp1 = r + 1;
    int cp1 = c + 1;

    bool cEdge = cp1 >= `+t+`;
    bool rEdge = rp1 >= `+e+`;
  `}function aP(n,t){var e=n.length,r=oP(e,t);return e===1?`getA(rc),
            rc + 1 >= `+n[0]+` ? 0. : getA(rc + 1),
            0, 0`:"getA("+r[0]+`),
          cEdge ? 0. : getA(`+r[1]+`),
          rEdge ? 0. : getA(`+r[2]+`),
          rEdge || cEdge ? 0. : getA(`+r[3]+")"}var cP=function(){function n(t,e,r){this.variableNames=["x"],this.outputShape=e.map(function(l,u){return l[0]+t[u]+l[1]});var i=t.length,a=Ze(i),s=e.map(function(l){return l[0]}).join(","),o=e.map(function(l,u){return l[0]+t[u]}).join(","),c=["coords[0]","coords[1]","coords[2]","coords[3]"].slice(0,i);if(i===1){this.userCode=`
        int start = `+s+`;
        int end = `+o+`;

        void main() {
          int outC = getOutputCoords();
          if (outC < start || outC >= end) {
            setOutput(float(`+r+`));
          } else {
            setOutput(getX(outC - start));
          }
        }
      `;return}this.userCode=`
      `+a+" start = "+a+"("+s+`);
      `+a+" end = "+a+"("+o+`);

      void main() {
        `+a+` outC = getOutputCoords();
        if (any(lessThan(outC, start)) || any(greaterThanEqual(outC, end))) {
          setOutput(float(`+r+`));
        } else {
          `+a+` coords = outC - start;
          setOutput(getX(`+c+`));
        }
      }
    `}return n}();var lP=function(){function n(t,e,r){this.variableNames=["x"],this.packedInputs=!0,this.packedOutput=!0,this.outputShape=e.map(function(y,w){return y[0]+t[w]+y[1]});for(var i=t.length,a=Ze(i),s=e.map(function(y){return y[0]}).join(","),o=e.map(function(y,w){return y[0]+t[w]}).join(","),c=Mt("rc",i),l=Mt("source",i),u=c[i-1]+" < "+this.outputShape[i-1],h=i===1?"source":"vec2("+l.slice(-2).join()+")",d=[a+" rc = outputLoc;",c[i-1]+` += 1;
       if(`+u+`) {
      `,i===1?"":`}
       rc = outputLoc;
       `+c[i-2]+` += 1;
       if(`+c[i-2]+" < "+this.outputShape[i-2]+") {",i===1?"":"  "+c[i-1]+` += 1;
         if(`+u+") {"],p=i===1?"rc < start || rc >= end":"any(lessThan(rc, start)) || any(greaterThanEqual(rc, end))",f="",m=0,g=i===1?2:4;m<g;m++)f+=`
        `+d[m]+`
        if (`+p+`) {
          result[`+m+"] = float("+r+`);
        } else {
          `+a+` source = rc - start;
          result[`+m+"] = getChannel(getX("+l.join()+"), "+h+`);
        }
      `;f+=i===1?"} ":"}}",this.userCode=`
      const `+a+" start = "+a+"("+s+`);
      const `+a+" end = "+a+"("+o+`);

      void main() {
        `+a+` outputLoc = getOutputCoords();
        vec4 result = vec4(0.);
        `+f+`
        setOutput(result);
      }
    `}return n}();var Os=function(){function n(t,e,r,i,a){if(i===void 0&&(i=!1),a===void 0&&(a=!1),this.variableNames=["x"],e==="avg"&&r)throw new Error("Cannot compute positions for average pool.");var s=t.filterWidth,o=t.strideHeight,c=t.strideWidth,l=t.dilationHeight,u=t.dilationWidth,h=t.effectiveFilterHeight,d=t.effectiveFilterWidth,p=t.padInfo.top,f=t.padInfo.left;this.outputShape=t.outShape;var m=e==="avg",g="((batch  * "+t.inHeight+" + xR) * "+t.inWidth+" + xC) * "+t.inChannels+" + d",y="(xR * "+t.inWidth+" + xC) * "+t.inChannels+" + d",w="0.0";if(m||(w="-1.0 / 1e-20"),r){var b=">=";this.userCode=`
        const ivec2 strides = ivec2(`+o+", "+c+`);
        const ivec2 pads = ivec2(`+p+", "+f+`);

        void main() {
          ivec4 coords = getOutputCoords();
          int batch = coords[0];
          int d = coords[3];

          ivec2 xRCCorner = coords.yz * strides - pads;
          int xRCorner = xRCCorner.x;
          int xCCorner = xRCCorner.y;

          // max/min x(?, ?, d) to get y(yR, yC, d).
          // ? = to be determined
          float minMaxValue = 0.0;
          float minMaxValueFound = 0.0;
          int minMaxPosition = 0;
          float avgValue = 0.0;

          for (int wR = 0; wR < `+h+`;
              wR += `+l+`) {
            int xR = xRCorner + wR;

            if (xR < 0 || xR >= `+t.inHeight+`) {
              continue;
            }

            for (int wC = 0; wC < `+d+`;
                wC += `+u+`) {
              int xC = xCCorner + wC;

              if (xC < 0 || xC >= `+t.inWidth+`) {
                continue;
              }

              float value = getX(batch, xR, xC, d);

              // If a min / max value has already been found, use it. If not,
              // use the current value.
              float currMinMaxValue = mix(
                  value, minMaxValue, minMaxValueFound);
              if (value `+b+` currMinMaxValue) {
                minMaxValue = value;
                minMaxValueFound = 1.0;
                minMaxPosition = `+(i?a?g:y:"wR * "+d+" + wC")+`;
              }
            }
          }
          setOutput(float(minMaxPosition));
        }
      `;return}var S="max",x=e+"("+e+"("+e+"(minMaxValue[0], minMaxValue[1]), minMaxValue[2]), minMaxValue[3])";e==="avg"&&(x="avgValue / count");var N=Math.floor(s/4)*4,I=s%4,C=`
      if (`+m+`) {
        avgValue += dot(values, ones);
      } else {
        minMaxValue = `+S+`(values, minMaxValue);
      }
    `;this.userCode=`
      const ivec2 strides = ivec2(`+o+", "+c+`);
      const ivec2 pads = ivec2(`+p+", "+f+`);
      const float initializationValue = `+w+`;
      const vec4 ones = vec4(1.0, 1.0, 1.0, 1.0);

      float count = 0.0;

      float getValue(int batch, int xR, int xC, int d) {
        if (xC < 0 || xC >= `+t.inWidth+`) {
          return initializationValue;
        }
        count += 1.0;
        return getX(batch, xR, xC, d);
      }

      void main() {
        ivec4 coords = getOutputCoords();
        int batch = coords[0];
        int d = coords[3];

        ivec2 xRCCorner = coords.yz * strides - pads;
        int xRCorner = xRCCorner.x;
        int xCCorner = xRCCorner.y;

        // max/min x(?, ?, d) to get y(yR, yC, d).
        // ? = to be determined
        vec4 minMaxValue = vec4(`+w+`);
        float avgValue = 0.0;
        count = 0.0;

        for (int wR = 0; wR < `+h+`;
            wR += `+l+`) {
          int xR = xRCorner + wR;

          if (xR < 0 || xR >= `+t.inHeight+`) {
            continue;
          }

          for (int wC = 0; wC < `+N+`; wC += 4) {
            int xC = xCCorner + wC * `+u+`;

            vec4 values = vec4(
              getValue(batch, xR, xC, d),
              getValue(batch, xR, xC + `+u+`, d),
              getValue(batch, xR, xC + 2 * `+u+`, d),
              getValue(batch, xR, xC + 3 * `+u+`, d)
            );

            `+C+`
          }

          int xC = xCCorner + `+N+`;
          if (`+(I===1)+`) {
            vec4 values = vec4(
              getValue(batch, xR, xC, d),
              initializationValue,
              initializationValue,
              initializationValue
            );

            `+C+`
          } else if (`+(I===2)+`) {
            vec4 values = vec4(
              getValue(batch, xR, xC, d),
              getValue(batch, xR, xC + `+u+`, d),
              initializationValue,
              initializationValue
            );

            `+C+`
          } else if (`+(I===3)+`) {
            vec4 values = vec4(
              getValue(batch, xR, xC, d),
              getValue(batch, xR, xC + `+u+`, d),
              getValue(batch, xR, xC + 2 * `+u+`, d),
              initializationValue
            );

            `+C+`
          }
        }
        setOutput(`+x+`);
      }
    `}return n}(),zp=function(){function n(t,e,r,i,a){if(i===void 0&&(i=!1),a===void 0&&(a=!1),this.variableNames=["x"],e==="avg"&&r)throw new Error("Cannot compute positions for average pool.");var s=t.filterWidth,o=t.strideDepth,c=t.strideHeight,l=t.strideWidth,u=t.dilationDepth,h=t.dilationHeight,d=t.dilationWidth,p=t.effectiveFilterDepth,f=t.effectiveFilterHeight,m=t.effectiveFilterWidth,g=t.padInfo.front,y=t.padInfo.top,w=t.padInfo.left;this.outputShape=t.outShape;var b=e==="avg",S="0.0";if(b||(S="-1.0 / 1e-20"),r){var x=">=";this.userCode=`
        const ivec3 strides =
            ivec3(`+o+", "+c+", "+l+`);
        const ivec3 pads = ivec3(`+g+", "+y+", "+w+`);

        void main() {
          ivec5 coords = getOutputCoords();
          int batch = coords.x;
          int ch = coords.u;

          ivec3 xCorner = ivec3(coords.y, coords.z, coords.w) * strides - pads;
          int xDCorner = xCorner.x;
          int xRCorner = xCorner.y;
          int xCCorner = xCorner.z;

          // max/min x(?, ?, ?, ch) to get y(yD, yR, yC, ch).
          // ? = to be determined
          float minMaxValue = 0.0;
          float minMaxValueFound = 0.0;
          int minMaxPosition = 0;

          for (int wD = 0; wD < `+p+`;
              wD += `+u+`) {
            int xD = xDCorner + wD;

            if (xD < 0 || xD >= `+t.inDepth+`) {
              continue;
            }

            for (int wR = 0; wR < `+f+`;
                wR += `+h+`) {
              int xR = xRCorner + wR;

              if (xR < 0 || xR >= `+t.inHeight+`) {
                continue;
              }

              for (int wC = 0; wC < `+m+`;
                  wC += `+d+`) {
                int xC = xCCorner + wC;

                if (xC < 0 || xC >= `+t.inWidth+`) {
                  continue;
                }

                float value = getX(batch, xD, xR, xC, ch);

                // If a min / max value has already been found, use it. If not,
                // use the current value.
                float currMinMaxValue = mix(
                    value, minMaxValue, minMaxValueFound);
                if (value `+x+` currMinMaxValue) {
                  minMaxValue = value;
                  minMaxValueFound = 1.0;
                  minMaxPosition = `+(i?a?"(((batch * "+t.inDepth+" + xD) * "+t.inHeight+" + xR) * "+t.inWidth+" + xC) * "+t.inChannels+" + ch":"((xD * "+t.inHeight+" + xR) * "+t.inWidth+" + xC) * "+t.inChannels+" + ch":"wD * "+f+" * "+m+` +
                      wR * `+m+" + wC")+`;
                }
              }
            }
          }
          setOutput(float(minMaxPosition));
        }
      `;return}var N="max",I=e+"("+e+"("+e+"(minMaxValue[0], minMaxValue[1]), minMaxValue[2]), minMaxValue[3])";e==="avg"&&(I="avgValue / count");var C=Math.floor(s/4)*4,O=s%4,D=`
      if (`+b+`) {
        avgValue += dot(values, ones);
      } else {
        minMaxValue = `+N+`(values, minMaxValue);
      }
    `;this.userCode=`
      const ivec3 strides =
        ivec3(`+o+", "+c+", "+l+`);
      const ivec3 pads = ivec3(`+g+", "+y+", "+w+`);
      const float initializationValue = `+S+`;
      const vec4 ones = vec4(1.0, 1.0, 1.0, 1.0);

      float count = 0.0;

      float getValue(int batch, int xD, int xR, int xC, int ch) {
        if (xC < 0 || xC >= `+t.inWidth+`) {
          return initializationValue;
        }
        count += 1.0;
        return getX(batch, xD, xR, xC, ch);
      }

      void main() {
        ivec5 coords = getOutputCoords();
        int batch = coords.x;
        int ch = coords.u;

        ivec3 xCorner = ivec3(coords.y, coords.z, coords.w) * strides - pads;
        int xDCorner = xCorner.x;
        int xRCorner = xCorner.y;
        int xCCorner = xCorner.z;

        // max/min x(?, ?, ?, d) to get y(yD, yR, yC, ch).
        // ? = to be determined
        vec4 minMaxValue = vec4(`+S+`);
        float avgValue = 0.0;
        count = 0.0;

        for (int wD = 0; wD < `+p+`;
            wD += `+u+`) {
          int xD = xDCorner + wD;

          if (xD < 0 || xD >= `+t.inDepth+`) {
            continue;
          }

          for (int wR = 0; wR < `+f+`;
            wR += `+h+`) {
            int xR = xRCorner + wR;

            if (xR < 0 || xR >= `+t.inHeight+`) {
              continue;
            }

            for (int wC = 0; wC < `+C+`; wC += 4) {
              int xC = xCCorner + wC * `+d+`;

              vec4 values = vec4(
                getValue(batch, xD, xR, xC, ch),
                getValue(batch, xD, xR, xC + `+d+`, ch),
                getValue(batch, xD, xR, xC + 2 * `+d+`, ch),
                getValue(batch, xD, xR, xC + 3 * `+d+`, ch)
              );

              `+D+`
            }

            int xC = xCCorner + `+C+`;
            if (`+(O===1)+`) {
              vec4 values = vec4(
                getValue(batch, xD, xR, xC, ch),
                initializationValue,
                initializationValue,
                initializationValue
              );

              `+D+`
            } else if (`+(O===2)+`) {
              vec4 values = vec4(
                getValue(batch, xD, xR, xC, ch),
                getValue(batch, xD, xR, xC + `+d+`, ch),
                initializationValue,
                initializationValue
              );

              `+D+`
            } else if (`+(O===3)+`) {
              vec4 values = vec4(
                getValue(batch, xD, xR, xC, ch),
                getValue(batch, xD, xR, xC + `+d+`, ch),
                getValue(batch, xD, xR, xC + 2 * `+d+`, ch),
                initializationValue
              );

              `+D+`
            }
          }
          setOutput(`+I+`);
        }
      }
    `}return n}();var V2=function(){function n(t,e){this.variableNames=["x"];var r=t.windowSize,i=t.batchSize,a=t.inSize,s=t.outSize;this.outputShape=[i,s];var o="0.0",c="";e==="prod"?o="1.0":e==="min"?(o="1.0 / 1e-20",c="min"):e==="max"&&(o="-1.0 / 1e-20",c="max");var l=e+"("+e+"("+e+"(minMaxValue[0], minMaxValue[1]), minMaxValue[2]), minMaxValue[3])";e==="sum"?l="sumValue":e==="prod"?l="prodValue":e==="all"?l="allValue":e==="any"&&(l="anyValue");var u=Math.floor(r/4)*4,h=r%4,d=`
      if (`+(e==="sum")+`) {
        sumValue += dot(values, ones);
      } else if (`+(e==="prod")+`) {
        vec2 tmp = vec2(values[0], values[1]) * vec2(values[2], values[3]);
        prodValue *= tmp[0] * tmp[1];
      } else {
        minMaxValue = `+c+`(values, minMaxValue);
      }
    `,p="vec4";e==="all"?(o="1.0",d=`
        bool reducedAllValue = all(values);
        float floatedReducedAllValue = float(reducedAllValue);
        allValue = float(allValue >= 1.0 && floatedReducedAllValue >= 1.0);
      `,p="bvec4"):e==="any"&&(o="0.0",d=`
        bool reducedAnyValue = any(values);
        float floatedReducedAnyValue = float(reducedAnyValue);
        anyValue = float(anyValue >= 1.0 || floatedReducedAnyValue >= 1.0);
      `,p="bvec4");var f="";a%r>0&&(f=`
        if (inIdx < 0 || inIdx >= `+a+`) {
          return initializationValue;
        }
      `),this.userCode=`
      const float initializationValue = `+o+`;
      const vec4 ones = vec4(1.0, 1.0, 1.0, 1.0);

      float getValue(int batch, int inIdx) {
        `+f+`
        return getX(batch, inIdx);
      }

      void main() {
        ivec2 coords = getOutputCoords();
        int batch = coords[0];
        int outIdx = coords[1];
        int inOffset = outIdx * `+r+`;

        vec4 minMaxValue = vec4(`+o+`);
        float prodValue = 1.0;
        float sumValue = 0.0;
        float allValue = 1.0;
        float anyValue = 0.0;

        for (int i = 0; i < `+u+`; i += 4) {
          int inIdx = inOffset + i;
          `+p+" values = "+p+`(
            getValue(batch, inIdx),
            getValue(batch, inIdx + 1),
            getValue(batch, inIdx + 2),
            getValue(batch, inIdx + 3)
          );

          `+d+`
        }

        int inIdx = inOffset + `+u+`;
        if (`+(h===1)+`) {
          `+p+" values = "+p+`(
            getValue(batch, inIdx),
            initializationValue,
            initializationValue,
            initializationValue
          );

          `+d+`
        } else if (`+(h===2)+`) {
          `+p+" values = "+p+`(
            getValue(batch, inIdx),
            getValue(batch, inIdx + 1),
            initializationValue,
            initializationValue
          );

          `+d+`
        } else if (`+(h===3)+`) {
          `+p+" values = "+p+`(
            getValue(batch, inIdx),
            getValue(batch, inIdx + 1),
            getValue(batch, inIdx + 2),
            initializationValue
          );

          `+d+`
        }
        setOutput(`+l+`);
      }
    `}return n}();var q2=function(){function n(t,e){this.variableNames=["A"],this.packedInputs=!0,this.packedOutput=!0,this.outputShape=t;for(var r="",i=0;i<4;i++){var a="thisRC = rc;";i%2===1&&(a+="thisRC.z += 1;"),i>1&&(a+="thisRC.y += 1;"),r+=`
        `+a+`
        `+(i>0?"if(thisRC.y < rows && thisRC.z < cols){":"")+`
          int flatIndex = getFlatIndex(thisRC);

          ivec3 inputRC = inputCoordsFromReshapedOutCoords(flatIndex);
          vec2 inputRCInnerDims = vec2(float(inputRC.y),float(inputRC.z));

          result[`+i+`] =
            getChannel(getA(inputRC.x, inputRC.y, inputRC.z), inputRCInnerDims);
        `+(i>0?"}":"")+`
      `}this.userCode=`
      `+uP(e)+`
      `+Ep(t)+`

      void main() {
        ivec3 rc = getOutputCoords();

        vec4 result = vec4(0.);

        ivec3 thisRC;
        int rows = `+t[1]+`;
        int cols = `+t[2]+`;

        `+r+`

        setOutput(result);
      }
    `}return n}();function uP(n){var t=_i(["r","c","d"],n);return`
    ivec3 inputCoordsFromReshapedOutCoords(int index) {
      `+t+`
      return ivec3(r, c, d);
    }
  `}var hP=function(){function n(t,e,r){this.variableNames=["dy"],this.outputShape=[],this.outputShape=e.shape;var i=e.shape,a=i[1],s=i[2],o=t.shape,c=o[1],l=o[2],u=[r&&c>1?a-1:a,r&&l>1?s-1:s],h=[r&&c>1?c-1:c,r&&l>1?l-1:l],d=u[0]/h[0],p=u[1]/h[1],f=1/d,m=1/p,g=Math.ceil(f)*2+2,y=Math.ceil(m)*2+2;this.userCode=`
      void main() {
        ivec4 coords = getOutputCoords();
        int b = coords[0];
        int d = coords[3];
        int r = coords[1];
        int c = coords[2];

        float accumulator = 0.0;

        const float heightScale = float(`+d+`);
        const float widthScale = float(`+p+`);

        const float invHeightScale = float(`+f+`);
        const float invWidthScale = float(`+m+`);

        const int winHeight = int(`+g+`);
        const int winWidth = int(`+y+`);

        // Compute bounds for where in dy we will look
        float startRLerp = floor(float(r) * invHeightScale);
        int startDyR = int(startRLerp - float(winHeight / 2));

        float startCLerp = floor(float(c) * invWidthScale);
        int startDyC = int(startCLerp - float(winWidth / 2));

        // Loop over dy
        for (int dyROffset = 0; dyROffset < winHeight; dyROffset++) {
          int dyR = dyROffset + startDyR;

          // Guard against the window exceeding the bounds of dy
          if (dyR < 0 || dyR >= `+c+`) {
            continue;
          }

          for (int dyCOffset = 0; dyCOffset < winWidth; dyCOffset++) {
            int dyC = dyCOffset + startDyC;

            // Guard against the window exceeding the bounds of dy
            if (dyC < 0 || dyC >= `+l+`) {
              continue;
            }

            float dxR = float(dyR) * heightScale;
            int topDxRIndex = int(floor(dxR));
            int bottomDxRIndex = int(min(ceil(dxR), `+(a-1)+`.0));
            float dxRLerp = dxR - float(topDxRIndex);
            float inverseDxRLerp = 1.0 - dxRLerp;

            float dxC = float(dyC) * widthScale;
            int leftDxCIndex = int(floor(dxC));
            int rightDxCIndex = int(min(ceil(dxC), `+(s-1)+`.0));
            float dxCLerp = dxC - float(leftDxCIndex);
            float inverseDxCLerp = 1.0 - dxCLerp;

            if (r == topDxRIndex && c == leftDxCIndex) {
              // topLeft
              accumulator +=
                getDy(b, dyR, dyC, d) * inverseDxRLerp * inverseDxCLerp;
            }

            if (r == topDxRIndex && c == rightDxCIndex) {
              // topRight
              accumulator += getDy(b, dyR, dyC, d) * inverseDxRLerp * dxCLerp;
            }

            if (r == bottomDxRIndex && c == leftDxCIndex) {
              // bottomLeft
              accumulator += getDy(b, dyR, dyC, d) * dxRLerp * inverseDxCLerp;
            }

            if (r == bottomDxRIndex && c == rightDxCIndex) {
              // bottomRight
              accumulator += getDy(b, dyR, dyC, d) * dxRLerp * dxCLerp;
            }
          }
        }
        // End loop over dy

        setOutput(accumulator);
      }
    `}return n}();var dP=function(){function n(t,e,r,i){this.variableNames=["A"],this.outputShape=[];var a=t[0],s=t[1],o=t[2],c=t[3];this.outputShape=[a,e,r,c];var l=[i&&e>1?s-1:s,i&&r>1?o-1:o],u=[i&&e>1?e-1:e,i&&r>1?r-1:r];this.userCode=`
      const vec2 effectiveInputOverOutputRatioRC = vec2(
          `+l[0]/u[0]+`,
          `+l[1]/u[1]+`);
      const vec2 inputShapeRC = vec2(`+s+".0, "+o+`.0);

      void main() {
        ivec4 coords = getOutputCoords();
        int b = coords[0];
        int d = coords[3];
        ivec2 yRC = coords.yz;

        // Fractional source index.
        vec2 sourceFracIndexRC = vec2(yRC) * effectiveInputOverOutputRatioRC;

        // Compute the four integer indices.
        ivec2 sourceFloorRC = ivec2(sourceFracIndexRC);
        ivec2 sourceCeilRC = ivec2(
          min(inputShapeRC - 1.0, ceil(sourceFracIndexRC)));

        float topLeft = getA(b, sourceFloorRC.x, sourceFloorRC.y, d);
        float bottomLeft = getA(b, sourceCeilRC.x, sourceFloorRC.y, d);
        float topRight = getA(b, sourceFloorRC.x, sourceCeilRC.y, d);
        float bottomRight = getA(b, sourceCeilRC.x, sourceCeilRC.y, d);

        vec2 fracRC = sourceFracIndexRC - vec2(sourceFloorRC);

        float top = topLeft + (topRight - topLeft) * fracRC.y;
        float bottom = bottomLeft + (bottomRight - bottomLeft) * fracRC.y;
        float newValue = top + (bottom - top) * fracRC.x;

        setOutput(newValue);
      }
    `}return n}();var pP=function(){function n(t,e,r,i){this.variableNames=["A"],this.packedInputs=!0,this.packedOutput=!0,this.outputShape=[];var a=t[0],s=t[1],o=t[2],c=t[3];this.outputShape=[a,e,r,c];var l=[i&&e>1?s-1:s,i&&r>1?o-1:o],u=[i&&e>1?e-1:e,i&&r>1?r-1:r];this.userCode=`
      const vec3 effectiveInputOverOutputRatioRC = vec3(
          `+l[0]/u[0]+`,
          `+l[1]/u[1]+`,
          `+l[1]/u[1]+`);
      const vec3 inputShapeRC = vec3(`+s+".0, "+o+`.0,
                                     `+o+`.0);

      float getAValue(int b, int r, int c, int d) {
        return getChannel(getA(b, r, c, d), vec2(c, d));
      }

      void main() {
        ivec4 coords = getOutputCoords();
        int b = coords[0];
        int d = coords[3];
        // Calculate values for next column in yRC.z.
        ivec3 yRC = coords.yzz + ivec3(0, 0, 1);

        // Fractional source index.
        vec3 sourceFracIndexRC = vec3(yRC) * effectiveInputOverOutputRatioRC;

        // Compute the four integer indices.
        ivec3 sourceFloorRC = ivec3(sourceFracIndexRC);
        ivec3 sourceCeilRC = ivec3(
          min(inputShapeRC - 1.0, ceil(sourceFracIndexRC)));

        // Should we calculate next column and row elements in 2x2 packed cell.
        bool hasNextCol = d < `+(c-1)+`;
        bool hasNextRow = coords.z < `+(r-1)+`;

        // In parallel, construct four corners for all four components in
        // packed 2x2 cell.
        vec4 topLeft = vec4(
          getAValue(b, sourceFloorRC.x, sourceFloorRC.y, d),
          hasNextCol ? getAValue(b, sourceFloorRC.x, sourceFloorRC.y, d + 1)
                     : 0.0,
          hasNextRow ? getAValue(b, sourceFloorRC.x, sourceFloorRC.z, d)
                     : 0.0,
          (hasNextRow && hasNextCol) ?
            getAValue(b, sourceFloorRC.x, sourceFloorRC.z, d + 1) : 0.0);

        vec4 bottomLeft = vec4(
          getAValue(b, sourceCeilRC.x, sourceFloorRC.y, d),
          hasNextCol ? getAValue(b, sourceCeilRC.x, sourceFloorRC.y, d + 1)
                     : 0.0,
          hasNextRow ? getAValue(b, sourceCeilRC.x, sourceFloorRC.z, d)
                     : 0.0,
          (hasNextRow && hasNextCol) ?
            getAValue(b, sourceCeilRC.x, sourceFloorRC.z, d + 1) : 0.0);

        vec4 topRight = vec4(
          getAValue(b, sourceFloorRC.x, sourceCeilRC.y, d),
          hasNextCol ? getAValue(b, sourceFloorRC.x, sourceCeilRC.y, d + 1)
                     : 0.0,
          hasNextRow ? getAValue(b, sourceFloorRC.x, sourceCeilRC.z, d)
                     : 0.0,
          (hasNextRow && hasNextCol) ?
            getAValue(b, sourceFloorRC.x, sourceCeilRC.z, d + 1) : 0.0);

        vec4 bottomRight = vec4(
          getAValue(b, sourceCeilRC.x, sourceCeilRC.y, d),
          hasNextCol ? getAValue(b, sourceCeilRC.x, sourceCeilRC.y, d + 1)
                     : 0.0,
          hasNextRow ? getAValue(b, sourceCeilRC.x, sourceCeilRC.z, d)
                     : 0.0,
          (hasNextRow && hasNextCol) ?
            getAValue(b, sourceCeilRC.x, sourceCeilRC.z, d + 1) : 0.0);

        vec3 fracRC = sourceFracIndexRC - vec3(sourceFloorRC);

        vec4 top = mix(topLeft, topRight, fracRC.yyzz);
        vec4 bottom = mix(bottomLeft, bottomRight, fracRC.yyzz);
        vec4 newValue = mix(top, bottom, fracRC.x);

        setOutput(newValue);
      }
    `}return n}();var fP=function(){function n(t,e,r){this.variableNames=["dy"],this.outputShape=[],this.outputShape=e.shape;var i=e.shape,a=i[1],s=i[2],o=t.shape,c=o[1],l=o[2],u=[r&&c>1?a-1:a,r&&l>1?s-1:s],h=[r&&c>1?c-1:c,r&&l>1?l-1:l],d=u[0]/h[0],p=u[1]/h[1],f=1/d,m=1/p,g=Math.ceil(f)*2+2,y=Math.ceil(m)*2+2;this.userCode=`
      void main() {
        ivec4 coords = getOutputCoords();
        int b = coords[0];
        int d = coords[3];
        int r = coords[1];
        int c = coords[2];

        float accumulator = 0.0;

        const float heightScale = float(`+d+`);
        const float widthScale = float(`+p+`);

        const float invHeightScale = float(`+f+`);
        const float invWidthScale = float(`+m+`);

        const int winHeight = int(`+g+`);
        const int winWidth = int(`+y+`);

        // Compute bounds for where in dy we will look
        float startRLerp = floor(float(r) * invHeightScale);
        int startDyR = int(floor(startRLerp - float(winHeight / 2)));

        float startCLerp = floor(float(c) * invWidthScale);
        int startDyC = int(floor(startCLerp - float(winWidth / 2)));

        // Loop over dy
        for (int dyROffset = 0; dyROffset < winHeight; dyROffset++) {
          int dyR = dyROffset + startDyR;

          // Guard against the window exceeding the bounds of dy
          if (dyR < 0 || dyR >= `+c+`) {
            continue;
          }

          for (int dyCOffset = 0; dyCOffset < winWidth; dyCOffset++) {
            int dyC = dyCOffset + startDyC;

            // Guard against the window exceeding the bounds of dy
            if (dyC < 0 || dyC >= `+l+`) {
              continue;
            }

            float sourceFracRow =
              float(`+u[0]+`) *
                (float(dyR) / float(`+h[0]+`));

            float sourceFracCol =
                float(`+u[1]+`) *
                  (float(dyC) / float(`+h[1]+`));

            int sourceNearestRow = int(min(
                float(int(`+a+`) - 1),
                `+r+` ? float(round(sourceFracRow)) :
                                  float(floor(sourceFracRow))));

            int sourceNearestCol = int(min(
                float(int(`+s+`) - 1),
                `+r+` ? float(round(sourceFracCol)) :
                                  float(floor(sourceFracCol))));

            if (r == sourceNearestRow && c == sourceNearestCol) {
              accumulator += getDy(b, dyR, dyC, d);
            }
          }
        }
        // End loop over dy

        setOutput(accumulator);
      }
    `}return n}();var mP=function(){function n(t,e,r,i){this.variableNames=["A"],this.outputShape=[];var a=t[0],s=t[1],o=t[2],c=t[3];this.outputShape=[a,e,r,c];var l=[i&&e>1?s-1:s,i&&r>1?o-1:o],u=[i&&e>1?e-1:e,i&&r>1?r-1:r],h=i?"0.5":"0.0";this.userCode=`
      const vec2 effectiveInputOverOutputRatioRC = vec2(
          `+l[0]/u[0]+`,
          `+l[1]/u[1]+`);
      const vec2 inputShapeRC = vec2(`+s+".0, "+o+`.0);

      void main() {
        ivec4 coords = getOutputCoords();
        int b = coords[0];
        int d = coords[3];
        ivec2 yRC = coords.yz;

        // Fractional source index.
        vec2 sourceFracIndexRC = vec2(yRC) * effectiveInputOverOutputRatioRC;

        // Compute the coordinators of nearest neighbor point.
        ivec2 sourceNearestRC = ivec2(
          min(inputShapeRC - 1.0, floor(sourceFracIndexRC + `+h+`)));

        float newValue = getA(b, sourceNearestRC.x, sourceNearestRC.y, d);

        setOutput(newValue);
      }
    `}return n}();var gP=function(){function n(t,e){this.variableNames=["x"];var r=t.length;if(r>4)throw new Error("WebGL backend: Reverse of rank-"+r+" tensor is not yet supported");if(this.outputShape=t,r===1){this.userCode=`
        void main() {
          int coord = getOutputCoords();
          setOutput(getX(`+t[0]+` - coord - 1));
        }
      `;return}var i=function(o){return e.indexOf(o)!==-1&&t[o]!==1?t[o]+" - coords["+o+"] - 1":"coords["+o+"]"},a=t.map(function(o,c){return i(c)}).join(","),s=Ze(r);this.userCode=`
      void main() {
        `+s+` coords = getOutputCoords();
        setOutput(getX(`+a+`));
      }
    `}return n}();var yP=function(){function n(t,e){this.variableNames=["x"],this.packedInputs=!0,this.packedOutput=!0;var r=t.length;if(r>4)throw new Error("WebGL backend: Reverse of rank-"+r+" tensor is not yet supported");this.outputShape=t;var i=Mt("rc",r),a=i[r-1]+" + 1 < "+this.outputShape[r-1],s=i[r-2]+" + 1 < "+this.outputShape[r-2],o=Ze(r);r===1?this.userCode=`
        void main(){
          int rc = getOutputCoords();
          vec4 result = vec4(0.);
          result.r = getChannel(getX(`+t[0]+` - rc - 1),
            `+t[0]+` - rc - 1);
          if(`+a+`){
              result.g = getChannel(getX(`+t[0]+` - (rc  + 1) - 1),
                `+t[0]+` - (rc  + 1) - 1);
          }
          setOutput(result);
        }
      `:this.userCode=`
        void main() {
          `+o+` rc = getOutputCoords();
          vec4 result = vec4(0.);
          result.r = `+c(i.slice())+`;
          if(`+a+`){
            result.g = `+l(i.slice())+`;
          }
          if(`+s+`) {
            result.b = `+u(i.slice())+`;
            if(`+a+`) {
              result.a = `+h(i.slice())+`;
            }
          }
          setOutput(result);
        }
    `;function c(f){return d(f)}function l(f){return f[r-1]="("+f[r-1]+" + 1)",d(f)}function u(f){return f[r-2]="("+f[r-2]+" + 1)",d(f)}function h(f){return f[r-1]="("+f[r-1]+" + 1)",f[r-2]="("+f[r-2]+" + 1)",d(f)}function d(f){var m=t.map(function(w,b){return p(b,f)}),g=m.join(","),y=m.slice(-2).join(",");return"getChannel(getX("+g+"), vec2("+y+"))"}function p(f,m){return e.indexOf(f)!==-1&&t[f]!==1?t[f]+" - "+m[f]+" - 1":""+m[f]}}return n}();var G2=function(){function n(t,e,r,i,a,s,o){this.variableNames=["updates","indices","defaultValue"],this.outputShape=s;var c=Ze(a.length),l=Ze(s.length),u="";r===1?u="i":r===2&&(u="i, j");var h="getIndices("+u+")",d="";i===1?d="i":i===2&&(d="i, coords[1]");var p="getUpdates("+d+")",f=e>1?"strides[j]":"strides";this.userCode=`
        `+c+" strides = "+c+"("+a+`);

        void main() {
          `+l+` coords = getOutputCoords();
          float sum = 0.0;
          bool found = false;
          for (int i = 0; i < `+t+`; i++) {
            int flattenedIndex = 0;
            for (int j = 0; j < `+e+`; j++) {
              int index = round(`+h+`);
              flattenedIndex += index * `+f+`;
            }
            if (flattenedIndex == coords[0]) {
              sum += `+p+`;
              found = true;
            }
          }
          setOutput(mix(getDefaultValue(), sum, float(found)));
        }
      `}return n}();var vP=function(){function n(t,e){this.variableNames=["x","segmentIds"];var r=t.windowSize,i=t.batchSize,a=t.inSize,s=t.numSegments,o=s*Math.ceil(a/r);this.outputShape=[i,o];var c="0.0",l="sumValue",u=Math.floor(r/4)*4,h=r%4,d=`
        sumValue += dot(values, segFilter);
    `,p="";a%r>0&&(p=`
        if (inIdx < 0 || inIdx >= `+a+`) {
          return initializationValue;
        }
      `);var f="";a%r>0&&(f=`
        if (inIdx < 0 || inIdx >= `+a+`) {
          return -1.0;
        }
      `),this.userCode=`
      const float initializationValue = `+c+`;

      float getValue(int batch, int inIdx) {
        `+p+`
        return getX(batch, inIdx);
      }

      float getSegmentIdAtIndex(int inIdx) {
        `+f+`
        return getSegmentIds(inIdx);
      }

      void main() {
        ivec2 coords = getOutputCoords();
        int batch = coords[0];
        int outIdx = coords[1];
        int inOffset = int(floor(float(outIdx) / float(
          `+s+")) * float("+r+`));
        int currentSeg = int(mod(float(outIdx), float(`+s+`)));

        float sumValue = 0.0;

        for (int i = 0; i < `+u+`; i += 4) {
          int inIdx = inOffset + i;
          vec4 values = vec4(
            getValue(batch, inIdx),
            getValue(batch, inIdx + 1),
            getValue(batch, inIdx + 2),
            getValue(batch, inIdx + 3)
          );

          vec4 segFilter = vec4(
            int(getSegmentIdAtIndex(inIdx)) == currentSeg ? 1 : 0,
            int(getSegmentIdAtIndex(inIdx + 1)) == currentSeg ? 1 : 0,
            int(getSegmentIdAtIndex(inIdx + 2)) == currentSeg ? 1 : 0,
            int(getSegmentIdAtIndex(inIdx + 3)) == currentSeg ? 1 : 0
          );

          `+d+`
        }

        int inIdx = inOffset + `+u+`;
        if (`+(h===1)+`) {
          vec4 values = vec4(
            getValue(batch, inIdx),
            initializationValue,
            initializationValue,
            initializationValue
          );

          int inIdxSeg = int(getSegmentIdAtIndex(inIdx));

          vec4 segFilter = vec4(
            int(getSegmentIdAtIndex(inIdx)) == currentSeg ? 1 : 0,
            0,
            0,
            0
          );

          `+d+`
        } else if (`+(h===2)+`) {
          vec4 values = vec4(
            getValue(batch, inIdx),
            getValue(batch, inIdx + 1),
            initializationValue,
            initializationValue
          );

          vec4 segFilter = vec4(
            int(getSegmentIdAtIndex(inIdx)) == currentSeg ? 1 : 0,
            int(getSegmentIdAtIndex(inIdx + 1)) == currentSeg ? 1 : 0,
              0,
              0
          );

          `+d+`
        } else if (`+(h===3)+`) {
          vec4 values = vec4(
            getValue(batch, inIdx),
            getValue(batch, inIdx + 1),
            getValue(batch, inIdx + 2),
            initializationValue
          );

          vec4 segFilter = vec4(
            int(getSegmentIdAtIndex(inIdx)) == currentSeg ? 1 : 0,
            int(getSegmentIdAtIndex(inIdx + 1)) == currentSeg ? 1 : 0,
            int(getSegmentIdAtIndex(inIdx + 2)) == currentSeg ? 1 : 0,
            0
          );

          `+d+`
        }
        setOutput(`+l+`);
      }
    `}return n}();var wP=function(){function n(t,e,r){this.variableNames=["c","a","b"],this.outputShape=e;var i,a;if(r>4)throw Error("Where for rank "+r+" is not yet supported");if(r===1)a="resRC",i="resRC";else{for(var s=["resRC.x","resRC.y","resRC.z","resRC.w"],o=[],c=[],l=0;l<e.length;l++)c.push(""+s[l]),l<t&&o.push(""+s[l]);i=o.join(),a=c.join()}var u=Ze(r);this.userCode=`
      void main() {
        `+u+` resRC = getOutputCoords();
        float cVal = getC(`+i+`);
        if (cVal >= 1.0) {
          setOutput(getA(`+a+`));
        } else {
          setOutput(getB(`+a+`));
        }
      }
    `}return n}();var xP=function(){function n(t){this.variableNames=["source"],this.outputShape=t,this.rank=t.length;var e=Ze(this.rank),r="uniform int start["+this.rank+"];",i=bP(this.rank),a,s=t.map(function(o,c){return"sourceLoc."+Pp[c]+" = start["+c+"] + coords."+Pp[c]+";"});a=`
        `+e+` sourceLoc;
        `+e+` coords = getOutputCoords();
        `+s.join(`
`)+`
      `,this.userCode=`
      `+r+`
      void main() {
        `+a+`
        setOutput(getSource(`+i+`));
      }
    `}return n.prototype.getCustomSetupFunc=function(t){var e=this;if(t.length!==this.rank)throw Error("The rank ("+this.rank+") of the program must match the "+("length of start ("+t.length+")"));return function(r,i){if(e.startLoc==null&&(e.startLoc=r.getUniformLocationNoThrow(i,"start"),e.startLoc==null))return;r.gl.uniform1iv(e.startLoc,t)}},n}(),Pp=["x","y","z","w","u","v"];function bP(n){if(n===1)return"sourceLoc";if(n<=6)return Pp.slice(0,n).map(function(t){return"sourceLoc."+t}).join(",");throw Error("Slicing for rank "+n+" is not yet supported")}var SP=function(){function n(t){this.variableNames=["source"],this.packedInputs=!0,this.packedOutput=!0,this.outputShape=t,this.rank=t.length;var e=Ze(this.rank),r=Mt("coords",this.rank),i=Mt("sourceLoc",this.rank),a=this.rank===1?"sourceLoc":"vec2("+i.slice(-2).join()+")",s="getChannel(getSource("+i.join()+"), "+a+")",o=`
      result.x = `+s+`;
      if (++`+r[this.rank-1]+" < "+t[this.rank-1]+`) {
        ++`+i[this.rank-1]+`;
        result.y = `+s+`;
        --`+i[this.rank-1]+`;
      }
    `,c=this.rank===1?"":`
      --`+r[this.rank-1]+`;
      if (++`+r[this.rank-2]+" < "+t[this.rank-2]+`) {
        ++`+i[this.rank-2]+`;
        result.z = `+s+`;
        if (++`+r[this.rank-1]+" < "+t[this.rank-1]+`) {
          ++`+i[this.rank-1]+`;
          result.w = `+s+`;
        }
      }
    `,l=this.rank<=4?`sourceLoc = coords +
            `+e+"("+t.map(function(u,h){return"start["+h+"]"}).join()+");":t.map(function(u,h){return i[h]+" = "+r[h]+" + start["+h+"];"}).join(`
`);this.userCode=`
      uniform int start[`+this.rank+`];
      void main() {
        `+e+` coords = getOutputCoords();
        `+e+` sourceLoc;
        `+l+`
        vec4 result = vec4(0.);
        `+o+`
        `+c+`
        setOutput(result);
      }
    `}return n.prototype.getCustomSetupFunc=function(t){var e=this;if(t.length!==this.rank)throw Error("The rank ("+this.rank+") of the program must match the "+("length of start ("+t.length+")"));return function(r,i){if(e.startLoc==null&&(e.startLoc=r.getUniformLocationNoThrow(i,"start"),e.startLoc==null))return;r.gl.uniform1iv(e.startLoc,t)}},n}();var LP=function(){function n(t,e,r){this.variableNames=["x"],this.outputShape=r;var i=r.length,a=Ze(r.length),s=Ze(r.length),o="";if(i===1)o="coords * strides + begin";else{var c=0;o=r.map(function(l,u){return c++,r.length===1?"coords * strides["+u+"] + begin["+u+"]":"coords["+(c-1)+"] * strides["+u+"] + begin["+u+"]"}).join(",")}this.userCode=`
      `+a+" begin = "+a+"("+t+`);
      `+a+" strides = "+a+"("+e+`);

      void main() {
        `+s+` coords = getOutputCoords();
        setOutput(getX(`+o+`));
      }
    `}return n}();var IP=function(){function n(t){this.gpgpu=t,this.numUsedTextures=0,this.numFreeTextures=0,this._numBytesAllocated=0,this._numBytesFree=0,this.freeTextures={},this.logEnabled=!1,this.usedTextures={}}return n.prototype.acquireTexture=function(t,e,r){var i=j2(e,r),a=K2(t,i,r);a in this.freeTextures||(this.freeTextures[a]=[]),a in this.usedTextures||(this.usedTextures[a]=[]);var s=Y2(t,i,this.gpgpu.gl,this.gpgpu.textureConfig,r);if(this.freeTextures[a].length>0){this.numFreeTextures--,this.numUsedTextures++,this._numBytesFree-=s,this.log();var o=this.freeTextures[a].shift();return this.usedTextures[a].push(o),o}var c;return i===Ft.PACKED_2X2_FLOAT32?c=this.gpgpu.createPackedMatrixTexture(t[0],t[1]):i===Ft.PACKED_2X2_FLOAT16?c=this.gpgpu.createFloat16PackedMatrixTexture(t[0],t[1]):i===Ft.UNPACKED_FLOAT32?c=this.gpgpu.createFloat32MatrixTexture(t[0],t[1]):i===Ft.UNPACKED_FLOAT16?c=this.gpgpu.createFloat16MatrixTexture(t[0],t[1]):i===Ft.PACKED_4X1_UNSIGNED_BYTE&&(c=this.gpgpu.createUnsignedBytesMatrixTexture(t[0],t[1])),this.usedTextures[a].push(c),this.numUsedTextures++,this._numBytesAllocated+=s,this.log(),c},n.prototype.releaseTexture=function(t,e,r,i){if(this.freeTextures==null)return;var a=j2(r,i),s=K2(e,a,i);s in this.freeTextures||(this.freeTextures[s]=[]);var o=Y2(e,a,this.gpgpu.gl,this.gpgpu.textureConfig,i),c=_.env().get("WEBGL_DELETE_TEXTURE_THRESHOLD");c!==-1&&this._numBytesAllocated>c?(this.gpgpu.deleteMatrixTexture(t),this._numBytesAllocated-=o):(this.freeTextures[s].push(t),this.numFreeTextures++,this._numBytesFree+=o),this.numUsedTextures--;var l=this.usedTextures[s],u=l.indexOf(t);if(u<0)throw new Error("Cannot release a texture that was never provided by this texture manager");l.splice(u,1),this.log()},n.prototype.log=function(){if(!this.logEnabled)return;var t=this.numFreeTextures+this.numUsedTextures;console.log("Free/Used",this.numFreeTextures+" / "+this.numUsedTextures,"("+t+")");var e=this._numBytesFree/this._numBytesAllocated;console.log("Bytes allocated: "+this._numBytesAllocated),console.log("Bytes unused: "+this._numBytesFree+" ("+Math.round(100*e)+"%)")},Object.defineProperty(n.prototype,"numBytesAllocated",{get:function(){return this._numBytesAllocated},enumerable:!0,configurable:!0}),Object.defineProperty(n.prototype,"numBytesFree",{get:function(){return this._numBytesFree},enumerable:!0,configurable:!0}),n.prototype.getNumUsedTextures=function(){return this.numUsedTextures},n.prototype.getNumFreeTextures=function(){return this.numFreeTextures},n.prototype.dispose=function(){var t=this;if(this.freeTextures==null)return;for(var e in this.freeTextures)this.freeTextures[e].forEach(function(r){t.gpgpu.deleteMatrixTexture(r)});for(var e in this.usedTextures)this.usedTextures[e].forEach(function(i){t.gpgpu.deleteMatrixTexture(i)});this.freeTextures=null,this.usedTextures=null,this.numUsedTextures=0,this.numFreeTextures=0,this._numBytesAllocated=0,this._numBytesFree=0},n}();function AP(n,t){var e=n;if(t===e.R32F)return 4;if(t===e.R16F)return 2;if(t===e.RGBA32F)return 16;if(t===n.RGBA)return 16;if(t===e.RGBA16F)return 8;throw new Error("Unknown internal format "+t)}function Y2(n,t,e,r,i){var a=TP(t,r),s;if(i){var o=ga(n[0],n[1]),c=o[0],l=o[1];s=c*l}else{var u=As(n[0],n[1]),h=u[0],d=u[1];s=h*d}var p=AP(e,a);return s*p}function TP(n,t){switch(n){case Ft.PACKED_2X2_FLOAT32:return Wp(t);case Ft.PACKED_2X2_FLOAT16:return Up(t);case Ft.UNPACKED_FLOAT32:return Dp(t);case Ft.UNPACKED_FLOAT16:return kp(t);case Ft.PACKED_4X1_UNSIGNED_BYTE:return Fp(t);default:throw new Error("Unknown physical texture type "+n)}}function NP(n){return _.env().getBool("WEBGL_RENDER_FLOAT32_ENABLED")?n?Ft.PACKED_2X2_FLOAT32:Ft.UNPACKED_FLOAT32:n?Ft.PACKED_2X2_FLOAT16:Ft.UNPACKED_FLOAT16}function j2(n,t){if(n===hn.UPLOAD)return Ft.PACKED_2X2_FLOAT32;if(n===hn.RENDER||n==null)return NP(t);if(n===hn.DOWNLOAD||n===hn.PIXELS)return Ft.PACKED_4X1_UNSIGNED_BYTE;throw new Error("Unknown logical texture type "+n)}function K2(n,t,e){return n[0]+"_"+n[1]+"_"+t+"_"+e}var CP=function(){function n(t,e){this.variableNames=["A"];for
      void main() {
        `+a+` resRC = getOutputCoords();
        setOutput(getA(`+s+`));
      }
    `}return n}();function _P(n){var t=n.length;if(t>5)throw Error("Tile for rank "+t+" is not yet supported");if(t===1)return"imod(resRC, "+n[0]+")";for(var e=["resRC.x","resRC.y","resRC.z","resRC.w","resRC.u"],r=[],i=0;i<n.length;i++)r.push("imod("+e[i]+", "+n[i]+")");return r.join()}var De=function(){function n(t,e){this.variableNames=["A"],this.outputShape=t,this.userCode=`
      float unaryOperation(float x) {
        `+e+`
      }

      void main() {
        float x = getAAtOutCoords();
        float y = unaryOperation(x);

        setOutput(y);
      }
    `}return n}(),dr="if (isnan(x)) return x;",RP="return x;",$2="return abs(x);",X2=dr+`
  return (x < 0.0) ? 0.0 : x;
`,J2=dr+`
  return (x < 0.0) ? 0.0 : min(6.0, x);
`,Z2="return (x >= 0.0) ? x : (exp(x) - 1.0);",OP=`
  // Stable and Attracting Fixed Point (0, 1) for Normalized Weights.
  // see: https://arxiv.org/abs/1706.02515
  float scaleAlpha = `+_.backend_util.SELU_SCALEALPHA+`;
  float scale = `+_.backend_util.SELU_SCALE+`;
  return (x >= 0.0) ? scale * x : scaleAlpha * (exp(x) - 1.0);
`;function EP(n){return n===void 0&&(n=0),dr+(`
    return x > 0.0 ? 1.0 : float(`+n+`);
  `)}var Q2="return -x;",ex="return ceil(x);",tx="return floor(x);",DP=`
  if (isnan(x)) { return 0.0; }
  return sign(x);
`,kP="return float(isnan(x));",FP="return float(isinf(x));",WP="return float(!isnan(x) && !isinf(x));",UP=`
  // OpenGL ES does not support round function.
  // The algorithm is based on banker's rounding.
  float base = floor(x);
  if ((x - base) < 0.5) {
    return floor(x);
  } else if ((x - base) > 0.5) {
    return ceil(x);
  } else {
    if (mod(base, 2.0) == 0.0) {
      return base;
    } else {
      return base + 1.0;
    }
  }
`,nx="return exp(x);",rx="return exp(x) - 1.0;",BP=`if (x < 0.0) return NAN;
  return log(x);`,zP="return log(1.0 + x);",PP="return sqrt(x);",MP="return inversesqrt(x);",HP="return 1.0 / (1.0 + exp(-1.0 * x));",VP=`
  float epsilon = 1.1920928955078125e-7;
  float threshold = log(epsilon) + 2.0;

  bool too_large = x > -threshold;
  bool too_small = x < threshold;

  float result;
  float exp_x = exp(x);

  if (too_large){
    result = x;
  }
  else if (too_small){
    result = exp_x;
  }
  else{
    result = log(exp_x + 1.0);
  }
  return result;
`,qP=dr+`
  if (abs(x) > 1.) {
    return NAN;
  }
  return asin(x);
`,GP=dr+`
  if (abs(x) > 1.) {
    return NAN;
  }
  return acos(x);
`,YP=dr+`
  return atan(x);
`,jP=`
  float e2x = exp(x);
  return (e2x - 1.0 / e2x) / 2.0;
`,KP=`
  float e2x = exp(-x);
  return (e2x + 1.0 / e2x) / 2.0;
`,$P=`
  float e2x = exp(-2.0 * abs(x));
  return sign(x) * (1.0 - e2x) / (1.0 + e2x);
`,XP=dr+"return log(x + sqrt(x * x + 1.0));",JP=dr+`
  if (x < 1.0) return NAN;
  return log(x + sqrt(x * x - 1.0));`,ZP=dr+`
  if ((x < -1.0) || (x > 1.0)) return NAN;
  return (log(1.0 + x) - log(1.0 - x)) / 2.0;`,QP=`
  // Error function is calculated approximately with elementary function.
  // See "Handbook of Mathematical Functions with Formulas,
  // Graphs, and Mathematical Tables", Abramowitz and Stegun.
  float p = `+_.backend_util.ERF_P+`;
  float a1 = `+_.backend_util.ERF_A1+`;
  float a2 = `+_.backend_util.ERF_A2+`;
  float a3 = `+_.backend_util.ERF_A3+`;
  float a4 = `+_.backend_util.ERF_A4+`;
  float a5 = `+_.backend_util.ERF_A5+`;

  float sign = sign(x);
  x = abs(x);
  float t = 1.0 / (1.0 + p * x);
  return sign * (1.0 - (((((a5*t + a4)*t) + a3)*t + a2)*t + a1)*t*exp(-x*x));
`,eM="return 1.0 / x;",tM="return float(!(x >= 1.0));",Lc="return x;";var nM="return x;",rM=`
  vec4 result = log(x);
  vec4 isNaN = vec4(lessThan(x, vec4(0.0)));
  result.r = isNaN.r == 1.0 ? NAN : result.r;
  result.g = isNaN.g == 1.0 ? NAN : result.g;
  result.b = isNaN.b == 1.0 ? NAN : result.b;
  result.a = isNaN.a == 1.0 ? NAN : result.a;

  return result;
`,ix=`
  vec4 result = x * vec4(greaterThanEqual(x, vec4(0.0)));
  bvec4 isNaN = isnan(x);

  result.r = isNaN.r ? x.r : result.r;
  result.g = isNaN.g ? x.g : result.g;
  result.b = isNaN.b ? x.b : result.b;
  result.a = isNaN.a ? x.a : result.a;

  return result;
`,ax=`
  vec4 result = min(x, vec4(6.)) * vec4(greaterThanEqual(x, vec4(0.0)));
  bvec4 isNaN = isnan(x);

  result.r = isNaN.r ? x.r : result.r;
  result.g = isNaN.g ? x.g : result.g;
  result.b = isNaN.b ? x.b : result.b;
  result.a = isNaN.a ? x.a : result.a;

  return result;
`,sx=`
  vec4 result;

  result.r = (x.r >= 0.0) ? x.r : (exp(x.r) - 1.0);
  result.g = (x.g >= 0.0) ? x.g : (exp(x.g) - 1.0);
  result.b = (x.b >= 0.0) ? x.b : (exp(x.b) - 1.0);
  result.a = (x.a >= 0.0) ? x.a : (exp(x.a) - 1.0);

  return result;
`,Es=function(){function n(t,e){this.variableNames=["A"],this.packedInputs=!0,this.packedOutput=!0,this.outputShape=t,this.userCode=`
      vec4 unaryOperation(vec4 x) {
        `+e+`
      }

      void main() {
        vec4 x = getAAtOutCoords();
        vec4 y = unaryOperation(x);

        setOutput(y);
      }
    `}return n}();var iM=function(){function n(t){this.variableNames=["A"],this.packedInputs=!0,this.packedOutput=!1,this.outputShape=t;var e=t.length,r=Mt("rc",e),i=Ze(e),a=lB(e,r),s=r.slice(-2),o=e<=1?"rc":"vec2("+s.join(",")+")";this.userCode=`
      void main() {
        `+i+` rc = getOutputCoords();
        vec4 packedInput = getA(`+a+`);

        setOutput(getChannel(packedInput, `+o+`));
      }
    `}return n}();var ox=_.backend_util.segment_util,aM=_.kernel_impls.split,sM=_.kernel_impls.tile,oM=_.kernel_impls.topkImpl,cM=_.kernel_impls.whereImpl,lM=1e-7,uM=1e-4,Ic={};function hM(n){return n in Ic||(Ic[n]={}),Ic[n]}function Ac(n,t){if(t===void 0&&(t=!1),n==="linear")return t?nM:RP;if(n==="relu")return t?ix:X2;if(n==="elu")return t?sx:Z2;if(n==="relu6")return t?ax:J2;if(n==="prelu")return t?v2:y2;throw new Error("Activation "+n+" has not been implemented for the WebGL backend.")}var dM=128,pM=600;function fM(){return _.env().global.screen==null?1024:_.env().global.screen.height*_.env().global.screen.width*window.devicePixelRatio*pM/1024/1024}var cx=1e3,lx=function(n){gU(t,n);function t(e){var r=n.call(this)||this;if(r.pendingRead=new WeakMap,r.pendingDisposal=new WeakSet,r.dataRefCount=new WeakMap,r.numBytesInGPU=0,r.uploadWaitMs=0,r.downloadWaitMs=0,r.warnedAboutMemory=!1,r.warnedAboutCPUBackend=!1,r.pendingDeletes=0,r.disposed=!1,!_.env().getBool("HAS_WEBGL"))throw new Error("WebGL is not supported on this device");if(e==null){var i=jn(_.env().getNumber("WEBGL_VERSION"));r.binaryCache=hM(_.env().getNumber("WEBGL_VERSION")),r.gpgpu=new M2(i),r.canvas=i.canvas,r.gpgpuCreatedLocally=!0}else r.gpgpu=e,r.binaryCache={},r.gpgpuCreatedLocally=!1,r.canvas=e.gl.canvas;return r.textureManager=new IP(r.gpgpu),r.numMBBeforeWarning=fM(),r.texData=new _.DataStorage(r,_.engine()),r}return t.prototype.numDataIds=function(){return this.texData.numDataIds()+(this.cpuBackend?this.cpuBackend.numDataIds():0)-this.pendingDeletes},t.prototype.write=function(e,r,i){if((_.env().getBool("WEBGL_CHECK_NUMERICAL_PROBLEMS")||_.env().getBool("DEBUG"))&&this.checkNumericalProblems(e),i==="complex64"&&e!=null)throw new Error("Cannot write to a complex64 dtype. Please use tf.complex(real, imag).");var a={};return this.texData.set(a,{shape:r,dtype:i,values:e,usage:hn.UPLOAD,refCount:1,complexParentRefCount:0}),a},t.prototype.incRef=function(e){var r=this.texData.get(e);r.refCount++},t.prototype.decRef=function(e){if(this.texData.has(e)){var r=this.texData.get(e);r.refCount--}},t.prototype.move=function(e,r,i,a){if(_.env().getBool("DEBUG")&&this.checkNumericalProblems(r),a==="complex64")throw new Error("Cannot write to a complex64 dtype. Please use tf.complex(real, imag).");this.texData.set(e,{shape:i,dtype:a,values:r,usage:hn.UPLOAD,refCount:1,complexParentRefCount:0})},t.prototype.disposeIntermediateTensorInfo=function(e){var r=e.dataId;if(this.texData.has(r)){var i=this.texData.get(r);i.refCount--,i.refCount<1&&this.disposeData(r)}},t.prototype.readSync=function(e){var r=this.texData.get(e),i=r.values,a=r.dtype,s=r.complexTensorInfos,o=r.slice,c=r.shape,l=r.isPacked;if(o!=null){var u=void 0;l?u=new Es(c,Lc):u=new De(c,Lc);var h=this.runWebGLProgram(u,[{dataId:e,shape:c,dtype:a}],a),d=this.readSync(h.dataId);return this.disposeIntermediateTensorInfo(h),d}if(i!=null)return this.convertAndCacheOnCPU(e);if(a==="string")return i;var p=this.activeTimers!=null,f;p&&(f=_.util.now());var m;if(a==="complex64"){var g=this.readSync(s.real.dataId),y=this.readSync(s.imag.dataId);m=_.backend_util.mergeRealAndImagArrays(g,y)}else m=this.getValuesFromTexture(e);return p&&(this.downloadWaitMs+=_.util.now()-f),this.convertAndCacheOnCPU(e,m)},t.prototype.read=function(e){return fc(this,void 0,void 0,function(){var r,i,a,s,o,c,l,u,h,d,p,f,m,g,y,w,b,S,x,N,I,C;return mc(this,function(O){switch(O.label){case 0:if(this.pendingRead.has(e))return r=this.pendingRead.get(e),[2,new Promise(function(D){return r.push(D)})];if(i=this.texData.get(e),a=i.values,s=i.shape,o=i.slice,c=i.dtype,l=i.complexTensorInfos,u=i.isPacked,o!=null)return h=void 0,u?h=new Es(s,Lc):h=new De(s,Lc),d=this.runWebGLProgram(h,[{dataId:e,shape:s,dtype:c}],c),p=this.read(d.dataId),this.disposeIntermediateTensorInfo(d),[2,p];if(a!=null)return[2,this.convertAndCacheOnCPU(e)];if(!_.env().getBool("WEBGL_DOWNLOAD_FLOAT_ENABLED")&&_.env().getNumber("WEBGL_VERSION")===2)throw new Error("tensor.data() with WEBGL_DOWNLOAD_FLOAT_ENABLED=false and WEBGL_VERSION=2 not yet supported.");return f=null,c!=="comple
  if (isnan(a)) return a;
  if (isnan(b)) return b;
`,xM=`
  result.r = isNaN.r > 0. ? NAN : result.r;
  result.g = isNaN.g > 0. ? NAN : result.g;
  result.b = isNaN.b > 0. ? NAN : result.b;
  result.a = isNaN.a > 0. ? NAN : result.a;
`;function Tc(n){return function(t){var e=t.inputs,r=t.backend,i=e.x,a=r,s=new De(i.shape,n);return a.runWebGLProgram(s,[i],i.dtype)}}function Ia(n){var t=n.opSnippet,e=n.packedOpSnippet,r=n.checkOutOfBounds,i=r===void 0?!1:r,a=n.supportsComplex,s=a===void 0?!1:a,o=n.cpuKernelImpl,c=n.dtype;return function(l){var u=l.inputs,h=l.backend,d=u,p=d.a,f=d.b,m=h;if(s&&p.dtype==="complex64"){var g=m.texData.get(p.dataId),y=m.texData.get(f.dataId),w=[[g.complexTensorInfos.real,y.complexTensorInfos.real],[g.complexTensorInfos.imag,y.complexTensorInfos.imag]].map(function(V){var P=V[0],q=V[1],K={dataId:P.dataId,dtype:P.dtype,shape:p.shape},G={dataId:q.dataId,dtype:q.dtype,shape:f.shape},H=new Bt(t,p.shape,f.shape);return m.runWebGLProgram(H,[K,G],_.upcastType(P.dtype,q.dtype))}),b=w[0],S=w[1],x=La({inputs:{real:b,imag:S},backend:m});return m.disposeIntermediateTensorInfo(b),m.disposeIntermediateTensorInfo(S),x}var N=c||_.upcastType(p.dtype,f.dtype);if(m.shouldExecuteOnCPU([p,f])&&o!=null){var g=m.texData.get(p.dataId),y=m.texData.get(f.dataId),I=o(p.shape,f.shape,g.values,y.values,N),C=I[0],O=I[1],D=m.makeTensorInfo(O,N),F=m.texData.get(D.dataId);return F.values=C,D}var k=_.env().getBool("WEBGL_PACK_BINARY_OPERATIONS")&&e!=null,B;return k?B=new hr(e,p.shape,f.shape,i):B=new Bt(t,p.shape,f.shape),m.runWebGLProgram(B,[p,f],N)}}var dx="return a + b;",SM=Ia({opSnippet:dx,packedOpSnippet:dx,supportsComplex:!0,cpuKernelImpl:KU}),LM={kernelName:_.Add,backendName:"webgl",kernelFunc:SM};var IM=bM+`
  return atan(a, b);
`,AM=`
  vec4 result = atan(a, b);
  vec4 isNaN = min(vec4(isnan(a)) + vec4(isnan(b)), vec4(1.0));
  `+xM+`
  return result;
`,TM=Ia({opSnippet:IM,packedOpSnippet:AM}),NM={kernelName:_.Atan2,backendName:"webgl",kernelFunc:TM};function _M(n){var t=n.inputs,e=n.backend,r=n.attrs,i=t.x;ya(i,"avgPool");var a=r.filterSize,s=r.strides,o=r.pad,c=r.dimRoundingMode,l=1;_.util.assert(_.backend_util.eitherStridesOrDilationsAreOne(s,l),function(){return"Error in avgPool: Either strides or dilations must be 1. "+("Got strides "+s+" and dilations '"+l+"'")});var u=_.backend_util.computePool2DInfo(i.shape,a,s,l,o,c);if(u.filterWidth===1&&u.filterHeight===1&&_.util.arraysEqual(u.inShape,u.outShape))return pr({inputs:{x:i},backend:e});var h=new Os(u,"avg",!1);return e.runWebGLProgram(h,[i],"float32")}var CM={kernelName:_.AvgPool,backendName:"webgl",kernelFunc:_M};function RM(n){var t=n.inputs,e=n.backend,r=n.attrs,i=t.dy,a=t.input,s=a;ya([i,a],"avgPoolBackprop");var o=r.filterSize,c=r.strides,l=r.pad,u=_.backend_util.computePool2DInfo(s.shape,o,c,1,l),h=new jB(u);return e.runWebGLProgram(h,[i],s.dtype)}var OM={kernelName:_.AvgPoolBackprop,backendName:"webgl",kernelFunc:RM};var EM=function(){function n(t,e,r,i,a,s){this.outputShape=[],this.variableNames=["x","mean","variance"],_.backend_util.assertAndGetBroadcastShape(t,e),_.backend_util.assertAndGetBroadcastShape(t,r);var o="0.0";i!=null&&(_.backend_util.assertAndGetBroadcastShape(t,i),this.variableNames.push("offset"),o="getOffsetAtOutCoords()");var c="1.0";a!=null&&(_.backend_util.assertAndGetBroadcastShape(t,a),this.variableNames.push("scale"),c="getScaleAtOutCoords()"),this.outputShape=t,this.userCode=`
      void main() {
        float x = getXAtOutCoords();
        float mean = getMeanAtOutCoords();
        float variance = getVarianceAtOutCoords();
        float offset = `+o+`;
        float scale = `+c+`;
        float inv = scale * inversesqrt(variance + float(`+s+`));
        setOutput(dot(vec3(x, -mean, offset), vec3(inv, inv, 1)));
      }
    `}return n}();var DM=function(){function n(t,e,r,i,a,s){this.packedInputs=!0,this.packedOutput=!0,this.variableNames=["x","mean","variance"],_.backend_util.assertAndGetBroadcastShape(t,e),_.backend_util.assertAndGetBroadcastShape(t,r);var o="vec4(0.0)";i!=null&&(_.backend_util.assertAndGetBroadcastShape(t,i),this.variableNames.push("offset"),o="getOffsetAtOutCoords()");var c="vec4(1.0)";a!=null&&(_.backend_util.assertAndGetBroadcastShape(t,a),this.variableNames.push("scale"),c="getScaleAtOutCoords()"),this.outputShape=t,this.userCode=`
      void main() {
        vec4 offset = `+o+`;
        vec4 scale = `+c+`;

        vec4 x = getXAtOutCoords();
        vec4 mean = getMeanAtOutCoords();
        vec4 variance = getVarianceAtOutCoords();

        vec4 inv = scale * inversesqrt(variance + vec4(`+s+`));

        setOutput((x - mean) * inv + offset);
      }
    `}return n}();var kM=function(n){var t=n.inputs,e=n.backend,r=n.attrs,i=t.x,a=t.mean,s=t.variance,o=t.offset,c=t.scale;_.util.assert(a.shape.length===s.shape.length,function(){return"Batch normalization gradient requires mean and variance to have equal ranks."}),_.util.assert(o==null||a.shape.length===o.shape.length,function(){return"Batch normalization gradient requires mean and offset to have equal ranks."}),_.util.assert(c==null||a.shape.length===c.shape.length,function(){return"Batch normalization gradient requires mean and scale to have equal ranks."});var l=r.varianceEpsilon;l==null&&(l=.001);var u=[i,a,s],h=null;o!=null&&(h=o.shape,u.push(o));var d=null;c!=null&&(d=c.shape,u.push(c));var p=_.env().getBool("WEBGL_PACK_NORMALIZATION")?new DM(i.shape,a.shape,s.shape,h,d,l):new EM(i.shape,a.shape,s.shape,h,d,l),f=e.runWebGLProgram(p,u,u[0].dtype);return f},FM={kernelName:_.FusedBatchNorm,backendName:"webgl",kernelFunc:kM};var WM="return float(a != b);",px=Ia({opSnippet:WM,dtype:"bool"}),UM={kernelName:_.NotEqual,backendName:"webgl",kernelFunc:px};function Mp(n){var t=n.inputs,e=n.backend,r=t.input,i=e.texData.get(r.dataId);return pr({inputs:{x:i.complexTensorInfos.real},backend:e})}var BM={kernelName:_.Real,backendName:"webgl",kernelFunc:Mp};var zM="return float(int(x));";function PM(n,t){var e=new De(n.shape,zM),r=t.runWebGLProgram(e,[n],"int32");return{dataId:r.dataId,shape:r.shape,dtype:r.dtype}}function Hp(n){var t=n.inputs,e=n.backend,r=n.attrs,i=t.x,a=r.dtype;if(a==="complex64"){if(i.dtype==="complex64")return pr({inputs:{x:i},backend:e});var s=_.zeros(i.shape),o=Hp({inputs:{x:i},backend:e,attrs:{dtype:"float32"}}),c=La({inputs:{real:o,imag:s},backend:e});return s.dispose(),e.disposeIntermediateTensorInfo(o),c}if(i.dtype==="complex64"){var l=Mp({inputs:{input:i},backend:e}),c=Hp({inputs:{x:l},backend:e,attrs:{dtype:a}});return e.disposeIntermediateTensorInfo(l),c}if(!_.util.hasEncodingLoss(i.dtype,a)){var c=pr({inputs:{x:i},backend:e});return{dataId:c.dataId,shape:c.shape,dtype:a}}if(a==="int32")return PM(i,e);if(a==="bool"){var u=e.makeTensorInfo([],"bool",_.util.getTypedArrayFromDType("bool",1)),h={a:i,b:u},c=px({inputs:h,backend:e});return e.disposeIntermediateTensorInfo(u),c}throw new Error("Error in Cast: failed to cast "+i.dtype+" to "+a)}var MM={kernelName:_.Cast,backendName:"webgl",kernelFunc:Hp};var HM=function(){function n(t){this.outputShape=[],this.outputShape=_.backend_util.computeOutShape(t,1),this.variableNames=t.map(function(c,l){return"T"+l});var e=new Array(t.length-1);e[0]=t[0][1];for(var r=1;r<e.length;r++)e[r]=e[r-1]+t[r][1];for(var i=["if (yC < "+e[0]+") setOutput(getT0(yR, yC));"],r=1;r<e.length;r++){var a=e[r-1];i.push("else if (yC < "+e[r]+") "+("setOutput(getT"+r+"(yR, yC-"+a+"));"))}var s=e.length,o=e[e.length-1];i.push("else setOutput(getT"+s+"(yR, yC-"+o+"));"),this.userCode=`
      void main() {
        ivec2 coords = getOutputCoords();
        int yR = coords.x;
        int yC = coords.y;

        `+i.join(`
        `)+`
      }
    `}return n}();var VM=function(){function n(t,e){this.packedInputs=!0,this.packedOutput=!0,this.outputShape=[],this.outputShape=_.backend_util.computeOutShape(t,e);var r=this.outputShape,i=r.length,a=Ze(i),s=Mt("coords",i),o=["x","y","z","w","u","v"].slice(0,i);this.variableNames=t.map(function(y,w){return"T"+w});var c=new Array(t.length-1);c[0]=t[0][e];for(var l=1;l<c.length;l++)c[l]=c[l-1]+t[l][e];for(var u=o[e],h=o.slice(-2),d=o.join(),p="if ("+u+" < "+c[0]+`) {
        return getChannel(
            getT0(`+d+"), vec2("+h.join()+`));
        }`,l=1;l<c.length;l++){var f=c[l-1];p+=`
        if (`+u+" < "+c[l]+"  && "+u+" >= "+c[l-1]+`) {
          return getChannel(
            getT`+l+"("+Nc(o,u,f)+`),
            vec2(`+Nc(h,u,f)+`));
        }`}var m=c.length,g=c[c.length-1];p+=`
        return getChannel(
          getT`+m+"("+Nc(o,u,g)+`),
          vec2(`+Nc(h,u,g)+"));",this.userCode=`
      float getValue(`+o.map(function(y){return"int "+y})+`) {
        `+p+`
      }

      void main() {
        `+a+` coords = getOutputCoords();
        vec4 result = vec4(getValue(`+s+`), 0., 0., 0.);

        `+s[i-1]+" = "+s[i-1]+` + 1;
        if (`+s[i-1]+" < "+r[i-1]+`) {
          result.g = getValue(`+s+`);
        }

        `+s[i-2]+" = "+s[i-2]+` + 1;
        if (`+s[i-2]+" < "+r[i-2]+`) {
          result.a = getValue(`+s+`);
        }

        `+s[i-1]+" = "+s[i-1]+` - 1;
        if (`+s[i-2]+" < "+r[i-2]+` &&
            `+s[i-1]+" < "+r[i-1]+`) {
          result.b = getValue(`+s+`);
        }
        setOutput(result);
      }
    `}return n}();function Nc(n,t,e){var r=n.indexOf(t),i=n.map(function(a,s){return s===r?a+" - "+e:a});return i.join()}function fx(n){var t=n.inputs,e=n.backend,r=t.input,i=e.texData.get(r.dataId);return pr({inputs:{x:i.complexTensorInfos.imag},backend:e})}var qM={kernelName:_.Imag,backendName:"webgl",kernelFunc:fx};function GM(n,t,e){var r=[Ti(n.shape)].concat(Ni(n.shape)),i={dtype:n.dtype,shape:r,dataId:n.dataId},a=[Ti(t)].concat(Ni(t)),s=new q2(a,r),o=!0,c=e.runWebGLProgram(s,[i],n.dtype,null,o);return{dataId:c.dataId,shape:t,dtype:c.dtype}}function fr(n){var t=n.inputs,e=n.backend,r=n.attrs,i=t.x,a=r.shape,s=e,o=_.util.sizeFromShape(i.shape),c=_.util.inferFromImplicitShape(a,o),l=_.util.sizeFromShape(c);_.util.assert(o===l,function(){return"The new shape ("+c+") has "+l+" elements and the old "+("shape ("+i.shape+") has "+o+" elements. The new shape and old ")+"shape must have the same number of elements."});var u=s.texData.get(i.dataId);return u.isPacked&&!Cs(i.shape,c)&&!(u.texture!==null&&Cs(u.shape,c))?GM(i,c,s):(s.incRef(i.dataId),{dataId:i.dataId,shape:c,dtype:i.dtype})}var YM={kernelName:_.Reshape,backendName:"webgl",kernelFunc:fr};function Aa(n,t,e){var r=n[0].dtype;if(r==="complex64"){var i=n.map(function(b){return Mp({inputs:{input:b},backend:e})}),a=n.map(function(b){return fx({inputs:{input:b},backend:e})}),s=Aa(i,t,e),o=Aa(a,t,e),c=La({inputs:{real:s,imag:o},backend:e});return i.forEach(function(b){return e.disposeIntermediateTensorInfo(b)}),a.forEach(function(b){return e.disposeIntermediateTensorInfo(b)}),e.disposeIntermediateTensorInfo(s),e.disposeIntermediateTensorInfo(o),c}if(n.length>_.env().getNumber("WEBGL_MAX_TEXTURES_IN_SHADER")){var l=Math.floor(n.length/2),u=Aa(n.slice(0,l),t,e),h=Aa(n.slice(l),t,e),d=Aa([u,h],t,e);return e.disposeIntermediateTensorInfo(u),e.disposeIntermediateTensorInfo(h),d}if(_.env().getBool("WEBGL_PACK_ARRAY_OPERATIONS")&&n[0].shape.length>1){var p=new VM(n.map(function(b){return b.shape}),t);return e.runWebGLProgram(p,n,r)}var f=_.backend_util.computeOutShape(n.map(function(b){return b.shape}),t),m=n.map(function(b){return fr({inputs:{x:b},attrs:{shape:[-1,_.util.sizeFromShape(b.shape.slice(t))]},backend:e})}),g=new HM(m.map(function(b){return b.shape})),y=e.runWebGLProgram(g,m,r);m.forEach(function(b){return e.disposeIntermediateTensorInfo(b)});var w=fr({inputs:{x:y},attrs:{shape:f},backend:e});return e.disposeIntermediateTensorInfo(y),w}function jM(n){var t=n.inputs,e=n.backend,r=n.attrs,i=r.axis,a=_.util.parseAxisParam(i,t[0].shape)[0],s=_.backend_util.computeOutShape(t.map(function(l){return l.shape}),a);if(_.util.sizeFromShape(s)===0)return e.makeTensorInfo(s,t[0].dtype,[]);var o=t.filter(function(l){return _.util.sizeFromShape(l.shape)>0});if(o.length===1)return o[0];var c=o.map(function(l){return l.shape});return _.backend_util.assertParamsConsistent(c,a),Aa(o,a,e)}var KM={kernelName:_.Concat,backendName:"webgl",kernelFunc:jM};var $M=hx+`
  return cos(x);
`,XM=Tc($M),JM={kernelName:_.Cos,backendName:"webgl",kernelFunc:XM};var ZM=`
if (a == b) {
  return 1.0;
};
return a / b;`,QM=`
  // vec4 one = vec4(equal(a, b));
  // return one + (vec4(1.0) - one) * a / b;
  vec4 result = a / b;
  if(a.x == b.x) {
    result.x = 1.;
  }
  if(a.y == b.y) {
    result.y = 1.;
  }
  if(a.z == b.z) {
    result.z = 1.;
  }
  if(a.w == b.w) {
    result.w = 1.;
  }

  return result;
`,eH=Ia({opSnippet:ZM,packedOpSnippet:QM,checkOutOfBounds:!0}),tH={kernelName:_.Div,backendName:"webgl",kernelFunc:eH};var mx=function(){function n(t,e,r){this.variableNames=["real","imag"];var i=e[1];this.outputShape=e;var a=r?"2.0 * "+Math.PI:"-2.0 * "+Math.PI,s=r?i+".0":"1.0",o;if(t==="real")o="return real * expR - imag * expI;";else if(t==="imag")o="return real * expI + imag * expR;";else throw new Error('FFT component must be either "real" or "imag", got '+t+".");this.userCode=`
      const float exponentMultiplier = `+a+`;

      float unaryOpComplex(float real, float expR, float imag, float expI) {
        `+o+`
      }

      float mulMatDFT(int batch, int index) {
        float indexRatio = float(index) / float(`+i+`);
        float exponentMultiplierTimesIndexRatio =
            exponentMultiplier * indexRatio;

        float result = 0.0;

        for (int i = 0; i < `+i+`; i++) {
          // x = (-2|2 * PI / N) * index * i;
          float x = exponentMultiplierTimesIndexRatio * float(i);
          float expR = cos(x);
          float expI = sin(x);
          float real = getReal(batch, i);
          float imag = getImag(batch, i);

          result +=
              unaryOpComplex(real, expR, imag, expI) / `+s+`;
        }

        return result;
      }

      void main() {
        ivec2 coords = getOutputCoords();
        setOutput(mulMatDFT(coords[0], coords[1]));
      }
    `}return n}();function gx(n,t,e){var r=e.texData.get(n.dataId),i=_.util.sizeFromShape(n.shape),a=n.shape[n.shape.length-1],s=i/a,o=fr({inputs:{x:n},backend:e,attrs:{shape:[s,a]}}),c=o.shape,l=new mx("real",c,t),u=new mx("imag",c,t),h=[{dataId:r.complexTensorInfos.real.dataId,dtype:r.complexTensorInfos.real.dtype,shape:c},{dataId:r.complexTensorInfos.imag.dataId,dtype:r.complexTensorInfos.imag.dtype,shape:c}],d=e.runWebGLProgram(l,h,"float32"),p=e.runWebGLProgram(u,h,"float32"),f=La({inputs:{real:d,imag:p},backend:e});e.disposeIntermediateTensorInfo(d),e.disposeIntermediateTensorInfo(p);var m=fr({inputs:{x:f},backend:e,attrs:{shape:n.shape}});return e.disposeIntermediateTensorInfo(m),m}function nH(n){var t=n.inputs,e=n.backend,r=t.input;return gx(r,!1,e)}var rH={kernelName:_.FFT,backendName:"webgl",kernelFunc:nH};var iH=function(){function n(t){this.variableNames=["Image"],this.outputShape=[];var e=t[2];this.outputShape=t,this.userCode=`
        void main() {
          ivec4 coords = getOutputCoords();
          int x = coords[2];

          int coordX = `+e+` - x;
          float outputValue;
          if(coordX >= 0 && coordX < `+e+`) {
            outputValue = getImage(coords[0], coords[1], coordX, coords[3]);
          } else {
            outputValue = getImage(coords[0], coords[1], coords[2], coords[3]);
          }
          setOutput(outputValue);
        }
    `}return n}();var aH={kernelName:_.FlipLeftRight,backendName:"webgl",kernelFunc:function(n){var t=n.inputs,e=n.backend,r=t.image,i=e,a=new iH(r.shape),s=i.runWebGLProgram(a,[r],r.dtype);return s}};var sH=function(){function n(t){this.variableNames=["A"];var e=Ht(),r=t[0],i=t[1];this.outputShape=t,this.userCode=`
      void main() {
        ivec3 coords = getOutputCoords();
        int texR = coords[0];
        int texC = coords[1];
        int depth = coords[2];
        vec2 uv = (vec2(texC, texR) + halfCR) / vec2(`+i+".0, "+r+`.0);

        vec4 values = `+e.texture2D+`(A, uv);
        float value;
        if (depth == 0) {
          value = values.r;
        } else if (depth == 1) {
          value = values.g;
        } else if (depth == 2) {
          value = values.b;
        } else if (depth == 3) {
          value = values.a;
        }

        setOutput(floor(value * 255.0 + 0.5));
      }
    `}return n}();var oH=function(){function n(t){this.variableNames=["A"],this.packedInputs=!1,this.packedOutput=!0;var e=Ht(),r=t[0],i=t[1];this.outputShape=t,this.userCode=`
      void main() {
        ivec3 coords = getOutputCoords();
        int texR = coords[0];
        int texC = coords[1];
        int depth = coords[2];

        vec4 result = vec4(0.);

        for(int row=0; row<=1; row++) {
          for(int col=0; col<=1; col++) {
            texC = coords[1] + row;
            depth = coords[2] + col;

            vec2 uv = (vec2(texC, texR) + halfCR) /
                       vec2(`+i+".0, "+r+`.0);
            vec4 values = `+e.texture2D+`(A, uv);
            float value;
            if (depth == 0) {
              value = values.r;
            } else if (depth == 1) {
              value = values.g;
            } else if (depth == 2) {
              value = values.b;
            } else if (depth == 3) {
              value = values.a;
            }

            result[row * 2 + col] = floor(value * 255.0 + 0.5);
          }
        }

        `+e.output+` = result;
      }
    `}return n}();var lH={kernelName:_.FromPixels,backendName:"webgl",kernelFunc:cH},Ta;function cH(n){var t=n.inputs,e=n.backend,r=n.attrs,i=t.pixels,a=r.numChannels,s=typeof HTMLVideoElement!="undefined"&&i instanceof HTMLVideoElement,o=typeof HTMLImageElement!="undefined"&&i instanceof HTMLImageElement,c=s?[i.videoWidth,i.videoHeight]:[i.width,i.height],l=c[0],u=c[1],h=[u,l],d=[u,l,a];(o||s)&&(Ta==null&&(Ta=document.createElement("canvas").getContext("2d")),Ta.canvas.width=l,Ta.canvas.height=u,Ta.drawImage(i,0,0,l,u),i=Ta.canvas);var p=e.makeTensorInfo(h,"int32");e.texData.get(p.dataId).usage=hn.PIXELS,e.gpgpu.uploadPixelDataToTexture(e.getTexture(p.dataId),i);var f=_.env().getBool("WEBGL_PACK")?new oH(d):new sH(d),m=e.runWebGLProgram(f,[p],"int32");return e.disposeData(p.dataId),m}function uH(n){var t=n.inputs,e=n.backend,r=t.input;return gx(r,!0,e)}var hH={kernelName:_.IFFT,backendName:"webgl",kernelFunc:uH};var yx=function(){function n(t,e){this.variableNames=["x"];var r=t.windowSize,i=t.batchSize,a=t.inSize,s=t.outSize;this.outputShape=[i,s];var o=Math.floor(r/4)*4,c=r%4,l="sumValue += dot(values, ones);";if(e!=null){var u=1/e;l="sumValue += dot(values * "+(_.util.isInt(u)?u.toPrecision(2):u)+", ones);"}var h="";a%r>0&&(h=`
        if (inIdx < 0 || inIdx >= `+a+`) {
          return 0.0;
        }
      `),this.userCode=`
      const vec4 ones = vec4(1.0, 1.0, 1.0, 1.0);

      float getValue(int batch, int inIdx) {
        `+h+`
        return getX(batch, inIdx);
      }

      void main() {
        ivec2 coords = getOutputCoords();
        int batch = coords[0];
        int outIdx = coords[1];
        int inOffset = outIdx * `+r+`;

        float sumValue = 0.0;

        for (int i = 0; i < `+o+`; i += 4) {
          int inIdx = inOffset + i;
          vec4 values = vec4(
            getValue(batch, inIdx),
            getValue(batch, inIdx + 1),
            getValue(batch, inIdx + 2),
            getValue(batch, inIdx + 3)
          );

          `+l+`
        }

        int inIdx = inOffset + `+o+`;
        if (`+(c===1)+`) {
          vec4 values = vec4(getValue(batch, inIdx), 0.0, 0.0, 0.0);

          `+l+`
        } else if (`+(c===2)+`) {
          vec4 values = vec4(
            getValue(batch, inIdx),
            getValue(batch, inIdx + 1), 0.0, 0.0);

          `+l+`
        } else if (`+(c===3)+`) {
          vec4 values = vec4(
            getValue(batch, inIdx),
            getValue(batch, inIdx + 1),
            getValue(batch, inIdx + 2), 0.0);

          `+l+`
        }
        setOutput(sumValue);
      }
    `}return n}();function dH(n){for(var t=[];t.length===0||t[t.length-1].outSize!==1;){var e=t.length?t[t.length-1].outSize:n[1],r=_.backend_util.computeOptimalWindowSize(e);t.push({inSize:e,windowSize:r,outSize:Math.ceil(e/r)})}return t}function vx(n,t,e,r){for(var i=dH(n.shape),a=n,s=0;s<i.length;s++){var o=i[s],c=o.inSize,l=o.windowSize,u=o.outSize,h=void 0,d=void 0;e==="mean"?h=s===0?new yx({windowSize:l,inSize:c,batchSize:n.shape[0],outSize:u},c):new yx({windowSize:l,inSize:c,batchSize:n.shape[0],outSize:u}):h=new V2({windowSize:l,inSize:c,batchSize:n.shape[0],outSize:u},e),d=a,a=r.runWebGLProgram(h,[a],t),d.dataId!==n.dataId&&r.disposeIntermediateTensorInfo(d)}return a}function pH(n,t,e,r){var i=_.util.sizeFromShape(t),a=_.util.sizeFromShape(n.shape),s=a/i,o=fr({inputs:{x:n},attrs:{shape:[s,i]},backend:r}),c=vx(o,n.dtype,"max",r),l=fr({inputs:{x:c},attrs:{shape:e},backend:r});return r.disposeIntermediateTensorInfo(o),r.disposeIntermediateTensorInfo(c),l}var mH=function(){function n(t,e){this.variableNames=["A"];for(var r=new Array(t.length),i=0;i<r.length;i++)r[i]=t[e[i]];this.outputShape=r,this.rank=r.length;var a=Ze(this.rank),s=fH(e);this.userCode=`
    void main() {
      `+a+` resRC = getOutputCoords();
      setOutput(getA(`+s+`));
    }
    `}return n}();function fH(n){var t=n.length;if(t>6)throw Error("Transpose for rank "+t+" is not yet supported");for(var e=["resRC.x","resRC.y","resRC.z","resRC.w","resRC.u","resRC.v"],r=new Array(t),i=0;i<n.length;i++)r[n[i]]=e[i];return r.join()}var gH=function(){function n(t,e){this.variableNames=["A"],this.packedInputs=!0,this.packedOutput=!0;for(var r=new Array(t.length),i=0;i<r.length;i++)r[i]=t[e[i]];if(this.outputShape=r,this.rank=r.length,this.rank>6)throw Error("Packed transpose for rank "+this.rank+" is not yet supported.");for(var a=Ze(this.rank),s=h2("rc",this.rank),o=new Array(this.rank),i=0;i<e.length;i++)o[e[i]]=s[i];var c="vec2("+o.slice(-2).join()+")",l="++"+s[this.rank-1]+" < "+r[this.rank-1],u="getChannel(getA("+o.join()+"), "+c+")";this.userCode=`
    void main() {
      `+a+` rc = getOutputCoords();
      vec4 result = vec4(0.);
      result[0] = `+u+`;
      if(`+l+`) {
        result[1] = `+u+`;
      }
      --`+s[this.rank-1]+`;
      if(++`+s[this.rank-2]+" < "+r[this.rank-2]+`) {
        result[2] = `+u+`;
        if(`+l+`) {
          result[3] = `+u+`;
        }
      }
      setOutput(result);
    }
    `}return n}();function Vp(n,t,e){var r=_.env().getBool("WEBGL_PACK_ARRAY_OPERATIONS")?new gH(n.shape,t):new mH(n.shape,t);return e.runWebGLProgram(r,[n],n.dtype)}var yH={kernelName:_.Max,backendName:"webgl",kernelFunc:function(n){var t=n.inputs,e=n.attrs,r=n.backend,i=t.x,a=e,s=a.reductionIndices,o=a.keepDims,c=r,l=i.shape.length,u=_.util.parseAxisParam(s,i.shape),h=u,d=_.backend_util.getAxesPermutation(h,l),p=d!=null,f=c.shouldExecuteOnCPU([i]),m=i;if(p){if(f){for(var g=c.texData.get(m.dataId),y=g.values,w=new Array(l),b=0;b<w.length;b++)w[b]=i.shape[d[b]];var S=Op(y,i.shape,i.dtype,d,w);m=c.makeTensorInfo(w,i.dtype);var x=c.texData.get(m.dataId);x.values=S}else m=Vp(i,d,c);h=_.backend_util.getInnerMostAxes(h.length,l)}_.backend_util.assertAxesAreInnerMostDims("max",h,l);var N=_.backend_util.computeOutAndReduceShapes(m.shape,h),I=N[0],C=N[1],O=I;o&&(O=_.backend_util.expandShapeToKeepDim(I,u));var D;if(f){var g=c.texData.get(m.dataId),y=g.values,F=eB(y,_.util.sizeFromShape(C),O,i.dtype);D=c.makeTensorInfo(O,i.dtype);var k=c.texData.get(D.dataId);k.values=F}else D=pH(m,C,O,c);return p&&c.disposeIntermediateTensorInfo(m),D}};function vH(n){var t=n.inputs,e=n.backend,r=n.attrs,i=t.x;ya(i,"maxPool");var a=r.filterSize,s=r.strides,o=r.pad,c=r.dimRoundingMode,l=1;_.util.assert(_.backend_util.eitherStridesOrDilationsAreOne(s,l),function(){return"Error in maxPool: Either strides or dilations must be 1. "+("Got strides "+s+" and dilations '"+l+"'")});var u=_.backend_util.computePool2DInfo(i.shape,a,s,l,o,c);if(u.filterWidth===1&&u.filterHeight===1&&_.util.arraysEqual(u.inShape,u.outShape))return pr({inputs:{x:i},backend:e});var h=new Os(u,"max",!1);return e.runWebGLProgram(h,[i],i.dtype)}var wH={kernelName:_.MaxPool,backendName:"webgl",kernelFunc:vH};function bH(n){var t=n.inputs,e=n.backend,r=n.attrs,i=t.dy,a=t.input,s=t.output,o=a;ya([a,s],"maxPoolBackprop");var c=r.filterSize,l=r.strides,u=r.pad,h=r.dimRoundingMode,d=_.backend_util.computePool2DInfo(o.shape,c,l,1,u,h),p=!0,f=new Os(d,"max",p),m=e.runWebGLProgram(f,[o],o.dtype),g=new Qz(d),y=e.runWebGLProgram(g,[i,m],o.dtype);return e.disposeIntermediateTensorInfo(m),y}var xH={kernelName:_.MaxPoolBackprop,backendName:"webgl",kernelFunc:bH};function SH(n,t,e,r){var i=new Os(e,"max",!1),a=r.runWebGLProgram(i,[n],"float32");i=new Os(e,"max",!0,!0,t);var s=r.runWebGLProgram(i,[n],"float32");return[a,s]}var LH={kernelName:_.MaxPoolWithArgmax,backendName:"webgl",kernelFunc:function(n){var t=n.inputs,e=n.attrs,r=n.backend,i=t.x,a=e,s=a.filterSize,o=a.strides,c=a.pad,l=a.includeBatchInIndex,u=r;_.util.assert(i.shape.length===4,function(){return"Error in maxPool: input must be rank 4 but got rank "+i.shape.length+"."});var h=[1,1];_.util.assert(_.backend_util.eitherStridesOrDilationsAreOne(o,h),function(){return"Error in maxPool: Either strides or dilations must be 1. "+("Got strides "+o+" and dilations '"+h+"'")});var d=_.backend_util.computePool2DInfo(i.shape,s,o,h,c),p=SH(i,l,d,u),f=p[0],m=p[1];return[f,m]}};function IH(n,t,e,r){var i=_.util.sizeFromShape(t),a=_.util.sizeFromShape(n.shape),s=a/i,o=fr({inputs:{x:n},attrs:{shape:[s,i]},backend:r}),c=vx(o,"float32","mean",r),l=fr({inputs:{x:c},attrs:{shape:e},backend:r});return r.disposeIntermediateTensorInfo(o),r.disposeIntermediateTensorInfo(c),l}var AH={kernelName:_.Mean,backendName:"webgl",kernelFunc:function(n){var t=n.inputs,e=n.attrs,r=n.backend,i=t.x,a=e,s=a.keepDims,o=a.axis,c=r,l=i.shape.length,u=_.util.parseAxisParam(o,i.shape),h=u,d=_.backend_util.getAxesPermutation(h,l),p=d!=null,f=c.shouldExecuteOnCPU([i]),m=[],g=i;if(p){if(f){for(var y=c.texData.get(g.dataId),w=y.values,b=new Array(l),S=0;S<b.length;S++)b[S]=i.shape[d[S]];var x=Op(w,i.shape,i.dtype,d,b);g=c.makeTensorInfo(b,i.dtype);var N=c.texData.get(g.dataId);N.values=x}else g=Vp(i,d,c);m.push(g),h=_.backend_util.getInnerMostAxes(h.length,l)}_.backend_util.assertAxesAreInnerMostDims("sum",h,l);var I=_.backend_util.computeOutAndReduceShapes(g.shape,h),C=I[0],O=I[1],D=C;s&&(D=_.backend_util.expandShapeToKeepDim(C,u));for(var F=IH(g,O,D,c),k=0,B=m;k<B.length;k++){var
        int start = `+s+`;
        int end = `+o+`;

        void main() {
          int outC = getOutputCoords();
          if (outC < start) {
            outC = start * 2 - outC - `+l+`;
          } else if(outC >= end) {
            outC = (end - 1) * 2 - outC + `+l+`;
          }
          setOutput(getX(outC - start));
        }
      `;return}this.userCode=`
      `+a+" start = "+a+"("+s+`);
      `+a+" end = "+a+"("+o+`);

      void main() {
        `+a+` outC = getOutputCoords();
        for (int i = 0; i < `+i+`; i++) {
          if (outC[i] < start[i]) {
            outC[i] = start[i] * 2 - outC[i] - `+l+`;
          } else if(outC[i] >= end[i]) {
            outC[i] = (end[i] - 1) * 2 - outC[i] + `+l+`;
          }
        }
        `+a+` coords = outC - start;
        setOutput(getX(`+c+`));
      }
    `}return n}();var NH=function(){function n(t,e,r){this.variableNames=["x"],this.packedInputs=!0,this.packedOutput=!0,this.outputShape=e.map(function(m,g){return m[0]+t[g]+m[1]});var i=t.length,a=Ze(i),s=e.map(function(m){return m[0]}).join(","),o=e.map(function(m,g){return m[0]+t[g]}).join(","),c=Mt("rc",i),l=Mt("source",i),u=c[i-1]+" < "+this.outputShape[i-1],h=i===1?"source":"vec2("+l.slice(-2).join()+")",d=r==="reflect"?0:1,p="";if(i===1){var f=`
        `+a+` source = rc;
        if (source < start) {
          source = start * 2 - source - `+d+`;
        } else if (source >= end) {
          source = (end - 1) * 2 - source + `+d+`;
        }
        source -= start;
      `;p=`
        `+a+` rc = outputLoc;
        `+f+`
        result[0] = getChannel(getX(`+l.join()+"), "+h+`);
        `+c[i-1]+` += 1;
        if(`+u+`) {
          `+f+`
          result[1] = getChannel(getX(`+l.join()+"), "+h+`);
        }
      `}else{var f=`
        `+a+` source = rc;
        `+a+" lt = "+a+`(lessThan(source, start));
        `+a+" gte = "+a+`(greaterThanEqual(source, end));
        `+a+` orig = 1 - (lt + gte);
        source = orig * source +
                lt * (start * 2 - source - `+d+`) +
                gte * ((end - 1) * 2 - source + `+d+`);
        source -= start;
      `;p=`
        `+a+` rc = outputLoc;
        `+f+`
        result[0] = getChannel(getX(`+l.join()+"), "+h+`);
        `+c[i-1]+` += 1;
        if(`+u+`) {
          `+f+`
          result[1] = getChannel(getX(`+l.join()+"), "+h+`);
        }
        rc = outputLoc;
        `+c[i-2]+` += 1;
        if(`+c[i-2]+" < "+this.outputShape[i-2]+`) {
          `+f+`
          result[2] = getChannel(getX(`+l.join()+"), "+h+`);
          `+c[i-1]+` += 1;
          if(`+u+`) {
            `+f+`
            result[3] = getChannel(getX(`+l.join()+"), "+h+`);
          }
        }
      `}this.userCode=`
      const `+a+" start = "+a+"("+s+`);
      const `+a+" end = "+a+"("+o+`);

      void main() {
        `+a+` outputLoc = getOutputCoords();
        vec4 result = vec4(0.);
        `+p+`
        setOutput(result);
      }
    `}return n}();var _H=function(n){var t=n.inputs,e=n.backend,r=n.attrs,i=t.x,a=r.paddings,s=r.mode,o=_.env().getBool("WEBGL_PACK_ARRAY_OPERATIONS")?new NH(i.shape,a,s):new TH(i.shape,a,s),c=e.runWebGLProgram(o,[i],i.dtype);return c},CH={kernelName:_.MirrorPad,backendName:"webgl",kernelFunc:_H};var wx={REAL:"return areal * breal - aimag * bimag;",IMAG:"return areal * bimag + aimag * breal;"},bx=function(){function n(t,e,r){this.variableNames=["AReal","AImag","BReal","BImag"],this.outputShape=_.backend_util.assertAndGetBroadcastShape(e,r),this.userCode=`
      float binaryOpComplex(
          float areal, float aimag, float breal, float bimag) {
        `+t+`
      }

      void main() {
        float areal = getARealAtOutCoords();
        float aimag = getAImagAtOutCoords();
        float breal = getBRealAtOutCoords();
        float bimag = getBImagAtOutCoords();
        setOutput(binaryOpComplex(areal, aimag, breal, bimag));
      }
    `}return n}();var xx="return a * b;";function RH(n){var t=n.inputs,e=n.backend,r=t.a,i=t.b,a=_.backend_util.upcastType(r.dtype,i.dtype);if(r.dtype==="complex64"){var s=e.texData.get(r.dataId),o=e.texData.get(i.dataId),c=new bx(wx.REAL,r.shape,i.shape),l=new bx(wx.IMAG,r.shape,i.shape),u=[{dataId:s.complexTensorInfos.real.dataId,dtype:s.complexTensorInfos.real.dtype,shape:r.shape},{dataId:s.complexTensorInfos.imag.dataId,dtype:s.complexTensorInfos.imag.dtype,shape:r.shape},{dataId:o.complexTensorInfos.real.dataId,dtype:o.complexTensorInfos.real.dtype,shape:i.shape},{dataId:o.complexTensorInfos.imag.dataId,dtype:o.complexTensorInfos.imag.dtype,shape:i.shape}],h=e.runWebGLProgram(c,u,"float32"),d=e.runWebGLProgram(l,u,"float32"),p=La({inputs:{real:h,imag:d},backend:e});return e.disposeIntermediateTensorInfo(h),e.disposeIntermediateTensorInfo(d),p}if(e.shouldExecuteOnCPU([r,i])){var s=e.texData.get(r.dataId),o=e.texData.get(i.dataId),f=tB(r.shape,i.shape,s.values,o.values,a),m=f[0],g=f[1],y=e.makeTensorInfo(g,a),w=e.texData.get(y.dataId);return w.values=m,y}var b;return _.env().getBool("WEBGL_PACK_BINARY_OPERATIONS")?b=new hr(xx,r.shape,i.shape):b=new Bt(xx,r.shape,i.shape),e.runWebGLProgram(b,[r,i],a)}var OH={kernelName:_.Multiply,backendName:"webgl",kernelFunc:RH};var EH={kernelName:_.NonMaxSuppressionV3,backendName:"webgl",kernelFunc:function(n){var t=n.inputs,e=n.backend,r=n.attrs;_.backend_util.warn("tf.nonMaxSuppression() in webgl locks the UI thread. Call tf.nonMaxSuppressionAsync() instead");var i=t,a=i.boxes,s=i.scores,o=r,c=o.maxOutputSize,l=o.iouThreshold,u=o.scoreThreshold,h=e,d=h.readSync(a.dataId),p=h.readSync(s.dataId),f=c,m=l,g=u;return _.kernel_impls.nonMaxSuppressionV3Impl(d,p,f,m,g)}};var DH=_.kernel_impls.nonMaxSuppressionV4Impl,kH={kernelName:_.NonMaxSuppressionV4,backendName:"webgl",kernelFunc:function(n){var t=n.inputs,e=n.backend,r=n.attrs;_.backend_util.warn("tf.nonMaxSuppression() in webgl locks the UI thread. Call tf.nonMaxSuppressionAsync() instead");var i=t,a=i.boxes,s=i.scores,o=r,c=o.maxOutputSize,l=o.iouThreshold,u=o.scoreThreshold,h=o.padToMaxOutputSize,d=e,p=d.readSync(a.dataId),f=d.readSync(s.dataId),m=DH(p,f,c,l,u,h),g=m.selectedIndices,y=m.validOutputs;return[g,y]}};var FH=_.kernel_impls.nonMaxSuppressionV5Impl,WH={kernelName:_.NonMaxSuppressionV5,backendName:"webgl",kernelFunc:function(n){var t=n.inputs,e=n.backend,r=n.attrs;_.backend_util.warn("tf.nonMaxSuppression() in webgl locks the UI thread. Call tf.nonMaxSuppressionAsync() instead");var i=t,a=i.boxes,s=i.scores,o=r,c=o.maxOutputSize,l=o.iouThreshold,u=o.scoreThreshold,h=o.softNmsSigma,d=e,p=d.readSync(a.dataId),f=d.readSync(s.dataId),m=c,g=l,y=u,w=h,b=FH(p,f,m,g,y,w),S=b.selectedIndices,x=b.selectedScores;return[S,x]}};var UH=function(){function n(t,e,r,i){this.variableNames=["Image"],this.outputShape=[];var a=t[1],s=t[2],o=Math.sin(e).toFixed(3),c=Math.cos(e).toFixed(3);this.outputShape=t;var l=_.backend_util.getImageCenter(i,a,s),u=l[0],h=l[1],d=u.toFixed(3),p=h.toFixed(3),f="";typeof r=="number"?f="float outputValue = "+r.toFixed(2)+";":f=`
        vec3 fill = vec3(`+r.join(",")+`);
        float outputValue = fill[coords[3]];`,this.userCode=`
        void main() {
          ivec4 coords = getOutputCoords();
          int x = coords[2];
          int y = coords[1];
          float coordXFloat = (float(x) - `+d+") * "+c+" - (float(y) - "+p+") * "+o+`;
          float coordYFloat = (float(x) - `+d+") * "+o+" + (float(y) - "+p+") * "+c+`;
          int coordX = int(round(coordXFloat + `+d+`));
          int coordY = int(round(coordYFloat + `+p+`));
          `+f+`
          if(coordX >= 0 && coordX < `+s+" && coordY >= 0 && coordY < "+a+`) {
            outputValue = getImage(coords[0], coordY, coordX, coords[3]);
          }
          setOutput(outputValue);
        }
    `}return n}();var BH={kernelName:_.RotateWithOffset,backendName:"webgl",kernelFunc:function(n){var t=n.inputs,e=n.attrs,r=n.backend,i=t.image,a=e,s=a.radians,o=a.fillValue,c=a.center,l=r,u=new UH(i.shape,s,o,c),h=l.runWebGLProgram(u,[i],i.dtype);return h}};var zH=hx+`
  return sin(x);
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/**
 * @license
 * Copyright 2017 Google LLC. All Rights Reserved.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
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 * http://www.apache.org/licenses/LICENSE-2.0
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/**
 * @license
 * Copyright 2018 Google LLC
 *
 * Use of this source code is governed by an MIT-style
 * license that can be found in the LICENSE file or at
 * https://opensource.org/licenses/MIT.
 * =============================================================================
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/**
 * @license
 * Copyright 2018 Google LLC. All Rights Reserved.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
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 * http://www.apache.org/licenses/LICENSE-2.0
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 * Unless required by applicable law or agreed to in writing, software
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/**
 * @license
 * Copyright 2018 Google LLC. All Rights Reserved.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
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 * Unless required by applicable law or agreed to in writing, software
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 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
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 * =============================================================================
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/**
 * @license
 * Copyright 2019 Google LLC
 *
 * Use of this source code is governed by an MIT-style
 * license that can be found in the LICENSE file or at
 * https://opensource.org/licenses/MIT.
 * =============================================================================
 */
/**
 * @license
 * Copyright 2019 Google LLC. All Rights Reserved.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * =============================================================================
 */
/**
 * @license
 * Copyright 2019 Google LLC. All Rights Reserved.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * =============================================================================
 */
/**
 * @license
 * Copyright 2020 Google Inc. All Rights Reserved.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * =============================================================================
 */
/**
 * @license
 * Copyright 2020 Google LLC
 *
 * Use of this source code is governed by an MIT-style
 * license that can be found in the LICENSE file or at
 * https://opensource.org/licenses/MIT.
 * =============================================================================
 */
/**
 * @license
 * Copyright 2020 Google LLC. All Rights Reserved.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * =============================================================================
 */
/**
 * @license
 * Copyright 2020 Google LLC. All Rights Reserved.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * =============================================================================
 */
/**
 * @license
 * Copyright 2020 Google LLC. All Rights Reserved.
 * Licensed under the Apache License, Version 2.0 (the License);
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an AS IS BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * =============================================================================
 */
/**
* @license
* Copyright 2018 Google LLC. All Rights Reserved.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* =============================================================================
*/
/** @license See the LICENSE file. */
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