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`}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(i,r){if(e.startLoc==null&&(e.startLoc=i.getUniformLocationNoThrow(r,"start"),e.startLoc==null))return;i.gl.uniform1iv(e.startLoc,t)}},n}(),Ap=["x","y","z","w","u","v"];function X9(n){if(n===1)return"sourceLoc";if(n<=6)return Ap.slice(0,n).map(function(t){return"sourceLoc."+t}).join(",");throw Error("Slicing for rank "+n+" is not yet supported")}var Z9=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),i=Qt("coords",this.rank),r=Qt("sourceLoc",this.rank),a=this.rank===1?"sourceLoc":"vec2("+r.slice(-2).join()+")",s="getChannel(getSource("+r.join()+"), "+a+")",o=`
`}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(i,r){if(e.startLoc==null&&(e.startLoc=i.getUniformLocationNoThrow(r,"start"),e.startLoc==null))return;i.gl.uniform1iv(e.startLoc,t)}},n}();var Q9=function(){function n(t,e,i){this.variableNames=["x"],this.outputShape=i;var r=i.length,a=Ze(i.length),s=Ze(i.length),o="";if(r===1)o="coords * strides + begin";else{var l=0;o=i.map(function(u,c){return l++,i.length===1?"coords * strides["+c+"] + begin["+c+"]":"coords["+(l-1)+"] * strides["+c+"] + begin["+c+"]"}).join(",")}this.userCode=`
`}return n}();var NL=x.backend_util.segment_util,U6=x.kernel_impls.split,B6=x.kernel_impls.tile,z6=x.kernel_impls.topkImpl,P6=x.kernel_impls.whereImpl,_6=1e-7,M6=1e-4,cl={};function H6(n){return n in cl||(cl[n]={}),cl[n]}function hl(n,t){if(t===void 0&&(t=!1),n==="linear")return t?k6:s6;if(n==="relu")return t?IL:mL;if(n==="elu")return t?TL:vL;if(n==="relu6")return t?AL:gL;if(n==="prelu")return t?WS:FS;throw new Error("Activation "+n+" has not been implemented for the WebGL backend.")}var V6=128,q6=600;function G6(){return x.env().global.screen==null?1024:x.env().global.screen.height*x.env().global.screen.width*window.devicePixelRatio*q6/1024/1024}var xL=1e3,CL=function(n){H_(t,n);function t(e){var i=n.call(this)||this;if(i.pendingRead=new WeakMap,i.pendingDisposal=new WeakSet,i.dataRefCount=new WeakMap,i.numBytesInGPU=0,i.uploadWaitMs=0,i.downloadWaitMs=0,i.warnedAboutMemory=!1,i.warnedAboutCPUBackend=!1,i.pendingDeletes=0,i.disposed=!1,!x.env().getBool("HAS_WEBGL"))throw new Error("WebGL is not supported on this device");if(e==null){var r=Gn(x.env().getNumber("WEBGL_VERSION"));i.binaryCache=H6(x.env().getNumber("WEBGL_VERSION")),i.gpgpu=new sL(r),i.canvas=r.canvas,i.gpgpuCreatedLocally=!0}else i.gpgpu=e,i.binaryCache={},i.gpgpuCreatedLocally=!1,i.canvas=e.gl.canvas;return i.textureManager=new e6(i.gpgpu),i.numMBBeforeWarning=G6(),i.texData=new x.DataStorage(i,x.engine()),i}return t.prototype.numDataIds=function(){return this.texData.numDataIds()+(this.cpuBackend?this.cpuBackend.numDataIds():0)-this.pendingDeletes},t.prototype.write=function(e,i,r){if((x.env().getBool("WEBGL_CHECK_NUMERICAL_PROBLEMS")||x.env().getBool("DEBUG"))&&this.checkNumericalProblems(e),r==="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:i,dtype:r,values:e,usage:sn.UPLOAD,refCount:1}),a},t.prototype.incRef=function(e){var i=this.texData.get(e);i.refCount++},t.prototype.decRef=function(e){if(this.texData.has(e)){var i=this.texData.get(e);i.refCount--}},t.prototype.move=function(e,i,r,a){if(x.env().getBool("DEBUG")&&this.checkNumericalProblems(i),a==="complex64")throw new Error("Cannot write to a complex64 dtype. Please use tf.complex(real, imag).");this.texData.set(e,{shape:r,dtype:a,values:i,usage:sn.UPLOAD,refCount:1})},t.prototype.disposeIntermediateTensorInfo=function(e){var i=e.dataId;if(this.texData.has(i)){var r=this.texData.get(i);r.refCount--,r.refCount<1&&this.disposeData(i)}},t.prototype.readSync=function(e){var i=this.texData.get(e),r=i.values,a=i.dtype,s=i.complexTensors,o=i.slice,l=i.shape,u=i.isPacked;if(o!=null){var c=void 0;u?c=new Ts(l,ul):c=new Re(l,ul);var h=this.runWebGLProgram(c,[{dataId:e,shape:l,dtype:a}],a),d=this.readSync(h.dataId);return this.disposeIntermediateTensorInfo(h),d}if(r!=null)return this.convertAndCacheOnCPU(e);if(a==="string")return r;var p=this.activeTimers!=null,f;p&&(f=x.util.now());var m;if(a==="complex64"){var g=s.real.dataSync(),v=s.imag.dataSync();m=x.backend_util.mergeRealAndImagArrays(g,v)}else m=this.getValuesFromTexture(e);return p&&(this.downloadWaitMs+=x.util.now()-f),this.convertAndCacheOnCPU(e,m)},t.prototype.read=function(e){return Qo(this,void 0,void 0,function(){var i,r,a,s,o,l,u,c,h,d,p,f,m,g,v,b,w,S,L,N,C,R;return el(this,function(D){switch(D.label){case 0:if(this.pendingRead.has(e))return i=this.pendingRead.get(e),[2,new Promise(function(k){return i.push(k)})];if(r=this.texData.get(e),a=r.values,s=r.shape,o=r.slice,l=r.dtype,u=r.complexTensors,c=r.isPacked,o!=null)return h=void 0,c?h=new Ts(s,ul):h=new Re(s,ul),d=this.runWebGLProgram(h,[{dataId:e,shape:s,dtype:l}],l),p=this.read(d.dataId),this.disposeIntermediateTensorInfo(d),[2,p];if(a!=null)return[2,this.convertAndCacheOnCPU(e)];if(!x.env().getBool("WEBGL_DOWNLOAD_FLOAT_ENABLED")&&x.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,l!=="complex64"&&x.env().get("WEBGL_BUFFER_SUPPORTED")&&(m=this.decode(e),g=this.texData.
`}return n}();var l8=function(n){var t=n.inputs,e=n.backend,i=n.attrs,r=t.x,a=t.mean,s=t.variance,o=t.offset,l=t.scale;x.util.assert(a.shape.length===s.shape.length,function(){return"Batch normalization gradient requires mean and variance to have equal ranks."}),x.util.assert(o==null||a.shape.length===o.shape.length,function(){return"Batch normalization gradient requires mean and offset to have equal ranks."}),x.util.assert(l==null||a.shape.length===l.shape.length,function(){return"Batch normalization gradient requires mean and scale to have equal ranks."});var u=i.varianceEpsilon;u==null&&(u=.001);var c=[r,a,s],h=null;o!=null&&(h=o.shape,c.push(o));var d=null;l!=null&&(d=l.shape,c.push(l));var p=x.env().getBool("WEBGL_PACK_NORMALIZATION")?new o8(r.shape,a.shape,s.shape,h,d,u):new s8(r.shape,a.shape,s.shape,h,d,u),f=e.runWebGLProgram(p,c,c[0].dtype);return f},u8={kernelName:x.FusedBatchNorm,backendName:"webgl",kernelFunc:l8};var c8=OL+`
`}return n}();var L8={kernelName:x.FromPixels,backendName:"webgl",kernelFunc:S8},Sa;function S8(n){var t=n.inputs,e=n.backend,i=n.attrs,r=t.pixels,a=i.numChannels,s=typeof HTMLVideoElement!="undefined"&&r instanceof HTMLVideoElement,o=typeof HTMLImageElement!="undefined"&&r instanceof HTMLImageElement,l=s?[r.videoWidth,r.videoHeight]:[r.width,r.height],u=l[0],c=l[1],h=[c,u],d=[c,u,a];(o||s)&&(Sa==null&&(Sa=document.createElement("canvas").getContext("2d")),Sa.canvas.width=u,Sa.canvas.height=c,Sa.drawImage(r,0,0,u,c),r=Sa.canvas);var p=e.makeTensorInfo(h,"int32");e.texData.get(p.dataId).usage=sn.PIXELS,e.gpgpu.uploadPixelDataToTexture(e.getTexture(p.dataId),r);var f=x.env().getBool("WEBGL_PACK")?new w8(d):new b8(d),m=e.runWebGLProgram(f,[p],"int32");return e.disposeData(p.dataId),m}function I8(n){for(var t=[];t.length===0||t[t.length-1].outSize!==1;){var e=t.length?t[t.length-1].outSize:n[1],i=x.backend_util.computeOptimalWindowSize(e);t.push({inSize:e,windowSize:i,outSize:Math.ceil(e/i)})}return t}function A8(n,t,e,i){for(var r=I8(n.shape),a=n,s=0;s<r.length;s++){var o=r[s],l=o.inSize,u=o.windowSize,c=o.outSize,h=new lL({windowSize:u,inSize:l,batchSize:n.shape[0],outSize:c},e),d=a;a=i.runWebGLProgram(h,[a],t),d.dataId!==n.dataId&&i.disposeData(d.dataId)}return a}function T8(n,t,e){var i=[Lr(n.shape)].concat(Ir(n.shape)),r={dtype:n.dtype,shape:i,dataId:n.dataId},a=[Lr(t)].concat(Ir(t)),s=new uL(a,i),o=!0,l=e.runWebGLProgram(s,[r],n.dtype,null,o);return{dataId:l.dataId,shape:t,dtype:l.dtype}}function xp(n){var t=n.inputs,e=n.backend,i=n.attrs,r=t.x,a=i.shape,s=e,o=x.util.sizeFromShape(r.shape),l=x.util.inferFromImplicitShape(a,o),u=x.util.sizeFromShape(l);x.util.assert(o===u,function(){return"The new shape ("+l+") has "+u+" elements and the old "+("shape ("+r.shape+") has "+o+" elements. The new shape and old ")+"shape must have the same number of elements."});var c=s.texData.get(r.dataId);return c.isPacked&&!Ls(r.shape,l)&&!(c.texture!==null&&Ls(c.shape,l))?T8(r,l,s):(s.incRef(r.dataId),{dataId:r.dataId,shape:l,dtype:r.dtype})}var N8={kernelName:x.Reshape,backendName:"webgl",kernelFunc:xp};function x8(n,t,e,i){var r=x.util.sizeFromShape(t),a=x.util.sizeFromShape(n.shape),s=a/r,o=xp({inputs:{x:n},attrs:{shape:[s,r]},backend:i}),l=A8(o,n.dtype,"max",i),u=xp({inputs:{x:l},attrs:{shape:e},backend:i});return i.disposeIntermediateTensorInfo(o),i.disposeIntermediateTensorInfo(l),u}var R8=function(){function n(t,e){this.variableNames=["A"];for(var i=new Array(t.length),r=0;r<i.length;r++)i[r]=t[e[r]];this.outputShape=i,this.rank=i.length;var a=Ze(this.rank),s=C8(e);this.userCode=`
