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  },{}],3:[function(require,module,exports){
  "use strict";Object.defineProperty(exports,"__esModule",{value:!0}),exports.addColorScale=addColorScale,exports.renderColorScaleToCanvas=renderColorScaleToCanvas,Object.defineProperty(exports,"colorscales",{enumerable:!0,get:function(){return _colorscales.colorscales}}),exports.plot=void 0;var _colorscales=require("./colorscales"),_arithmeticsParser=require("./arithmetics-parser");function _typeof(e){return(_typeof="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(e){return typeof e}:function(e){return e&&"function"==typeof Symbol&&e.constructor===Symbol&&e!==Symbol.prototype?"symbol":typeof e})(e)}function _classCallCheck(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}function _defineProperties(e,t){for(var a=0;a<t.length;a++){var r=t[a];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in r&&(r.writable=!0),Object.defineProperty(e,r.key,r)}}function _createClass(e,t,a){return t&&_defineProperties(e.prototype,t),a&&_defineProperties(e,a),e}function hasOwnProperty(e,t){return Object.prototype.hasOwnProperty.call(e,t)}function defaultFor(e,t){return void 0!==e?e:t}function create3DContext(e,t){for(var a=["webgl","experimental-webgl"],r=null,o=0;o<a.length;++o){try{r=e.getContext(a[o],t)}catch(e){}if(r)break}return r&&r.getExtension("OES_texture_float")?r:null}function createProgram(e,t,a){var r=e.createShader(e.VERTEX_SHADER);if(e.shaderSource(r,t),e.compileShader(r),!e.getShaderParameter(r,e.COMPILE_STATUS))throw new Error(e.getShaderInfoLog(r));var o=e.createShader(e.FRAGMENT_SHADER);if(e.shaderSource(o,a),e.compileShader(o),!e.getShaderParameter(o,e.COMPILE_STATUS))throw new Error(e.getShaderInfoLog(o));var n=e.createProgram();return e.attachShader(n,r),e.attachShader(n,o),e.linkProgram(n),n}function setRectangle(e,t,a,r,o){var n=t,i=t+r,l=a,s=a+o;e.bufferData(e.ARRAY_BUFFER,new Float32Array([n,l,i,l,n,s,n,s,i,l,i,s]),e.STATIC_DRAW)}function createDataset(e,t,a,r,o){var n;return e&&(e.viewport(0,0,r,o),n=e.createTexture(),e.bindTexture(e.TEXTURE_2D,n),e.texParameteri(e.TEXTURE_2D,e.TEXTURE_WRAP_S,e.CLAMP_TO_EDGE),e.texParameteri(e.TEXTURE_2D,e.TEXTURE_WRAP_T,e.CLAMP_TO_EDGE),e.texParameteri(e.TEXTURE_2D,e.TEXTURE_MIN_FILTER,e.NEAREST),e.texParameteri(e.TEXTURE_2D,e.TEXTURE_MAG_FILTER,e.NEAREST),e.texImage2D(e.TEXTURE_2D,0,e.LUMINANCE,r,o,0,e.LUMINANCE,e.FLOAT,new Float32Array(a))),{textureData:n,width:r,height:o,data:a,id:t}}function destroyDataset(e,t){e&&e.deleteTexture(t.textureData)}function addColorScale(e,t,a){if(t.length!==a.length)throw new Error("Invalid color scale.");_colorscales.colorscales[e]={colors:t,positions:a}}function renderColorScaleToCanvas(e,t){var a=_colorscales.colorscales[e];t.height=1;var r=t.getContext("2d");if("[object Object]"===Object.prototype.toString.call(a)){t.width=256;for(var o=r.createLinearGradient(0,0,256,1),n=0;n<a.colors.length;++n)o.addColorStop(a.positions[n],a.colors[n]);r.fillStyle=o,r.fillRect(0,0,256,1)}else{if("[object Uint8Array]"!==Object.prototype.toString.call(a))throw new Error("Color scale not defined.");t.width=256;var i=r.createImageData(256,1);i.data.set(a),r.putImageData(i,0,0)}}var vertexShaderSource="\nattribute vec2 a_position;\nattribute vec2 a_texCoord;\nuniform mat3 u_matrix;\nuniform vec2 u_resolution;\nvarying vec2 v_texCoord;\nvoid main() {\n  // apply transformation matrix\n  vec2 position = (u_matrix * vec3(a_position, 1)).xy;\n  // convert the rectangle from pixels to 0.0 to 1.0\n  vec2 zeroToOne = position / u_resolution;\n  // convert from 0->1 to 0->2\n  vec2 zeroToTwo = zeroToOne * 2.0;\n  // convert from 0->2 to -1->+1 (clipspace)\n  vec2 clipSpace = zeroToTwo - 1.0;\n  gl_Position = vec4(clipSpace * vec2(1, -1), 0, 1);\n  // pass the texCoord to the fragment shader\n  // The GPU will interpolate this value between points.\n  v_texCoord = a_texCoord;\n}",fragmentShaderSource="\nprecision mediump float;\n// our texture\nuniform sampler2D u_textureData;\nuniform sampler2D u_textureScale;\nuniform vec2 u_textureSize;\nuniform vec2 u_domain;\nuniform vec2 u_display_range;\nuniform bool u_apply_display_range;\nuniform float u_noDataValue;\nuniform bool u_clampLow;\nuniform bool u_clampHigh;\n// the texCoords passed in from the vertex shader.\nvarying vec2 v_texCoord;\n\nbool isnan( float val ) {\n  return ( val < 0.0 || 0.0 < val || val == 0.0 ) ? false : true;\n}\n\nvoid main() {\n  vec2 onePixel = vec2(1.0, 1.0) / u_textureSize;\n  float value = texture2D(u_textureData, v_texCoord)[0];\n  if(value < -3.402823466e+38) // Check for possible NaN value\n    gl_FragColor = vec4(0.0, 0, 0, 0.0);\n  else if (value == u_noDataValue || isnan(value))\n    gl_FragColor = vec4(0.0, 0, 0, 0.0);\n  else if (u_apply_display_range && (value < u_display_range[0] || value >= u_display_range[1]))\n        gl_FragColor = vec4(0.0, 0, 0, 0.0);\n  else if ((!u_clampLow && value < u_domain[0]) || (!u_clampHigh && value > u_domain[1]))\n    gl_FragColor = vec4(0, 0, 0, 0);\n  else {\n    float normalisedValue = (value - u_domain[0]) / (u_domain[1] - u_domain[0]);\n    gl_FragColor = texture2D(u_textureScale, vec2(normalisedValue, 0));\n  }\n}",plot=function(){function e(t){if(_classCallCheck(this,e),this.datasetCollection={},this.currentDataset=null,this.setCanvas(t.canvas),defaultFor(t.useWebGL,!0))if(null!==create3DContext(document.createElement("canvas"),{premultipliedAlpha:!1})){var a=create3DContext(this.canvas,{premultipliedAlpha:!1});this.gl=a,this.program=createProgram(a,vertexShaderSource,fragmentShaderSource),a.useProgram(this.program);var r=a.getAttribLocation(this.program,"a_texCoord");this.texCoordBuffer=a.createBuffer(),a.bindBuffer(a.ARRAY_BUFFER,this.texCoordBuffer),a.bufferData(a.ARRAY_BUFFER,new Float32Array([0,0,1,0,0,1,0,1,1,0,1,1]),a.STATIC_DRAW),a.enableVertexAttribArray(r),a.vertexAttribPointer(r,2,a.FLOAT,!1,0,0)}else this.ctx=this.canvas.getContext("2d");else this.ctx=this.canvas.getContext("2d");if(t.colorScaleImage?this.setColorScaleImage(t.colorScaleImage):this.setColorScale(defaultFor(t.colorScale,"viridis")),this.setDomain(defaultFor(t.domain,[0,1])),this.displayRange=defaultFor(t.displayRange,[0,1]),this.applyDisplayRange=defaultFor(t.applyDisplayRange,!1),this.setClamp(defaultFor(t.clampLow,!0),t.clampHigh),this.setNoDataValue(t.noDataValue),t.data){var o=t.data.length;this.setData(t.data,defaultFor(t.width,t.data[o-2]),defaultFor(t.height,t.data[o-2]))}if(t.datasets)for(var n=0;n<t.datasets.length;++n){var i=t.datasets[n];this.addDataset(i.id,i.data,i.width,i.height)}t.matrix?this.matrix=t.matrix:this.matrix=[1,0,0,0,1,0,0,0,1]}return _createClass(e,[{key:"getData",value:function(){var e=this.currentDataset;if(!e)throw new Error("No dataset available.");return e.data}},{key:"atPoint",value:function(e,t){var a=this.currentDataset;if(!a)throw new Error("No dataset available.");if(e>=a.width||t>=a.height)throw new Error("Coordinates are outside of image bounds.");return a.data[t*a.width+e]}},{key:"setData",value:function(e,t,a){this.currentDataset&&null===this.currentDataset.id&&destroyDataset(this.gl,this.currentDataset),this.currentDataset=createDataset(this.gl,null,e,t,a)}},{key:"addDataset",value:function(e,t,a,r){if(this.datasetAvailable(e))throw new Error("There is already a dataset registered with id '".concat(e,"'"));this.datasetCollection[e]=createDataset(this.gl,e,t,a,r),this.currentDataset||(this.currentDataset=this.datasetCollection[e])}},{key:"setCurrentDataset",value:function(e){if(!this.datasetAvailable(e))throw new Error("No such dataset registered: '".concat(e,"'"));this.currentDataset&&null===this.currentDataset.id&&destroyDataset(this.gl,this.currentDataset),this.currentDataset=this.datasetCollection[e]}},{key:"removeDataset",value:function(e){var t=this.datasetCollection[e];if(!t)throw new Error("No such dataset registered: '".concat(e,"'"));destroyDataset(this.gl,t),this.currentDataset===t&&(this.currentDataset=null),delete this.datasetCollection[e]}},{key:"datasetAvailable",value:function(e){return hasOwnProperty(this.datasetCollection,e)}},{key:"getColorScaleImage",value:function(){return this.colorScaleImage}},{key:"setCanvas",value:function(e){this.canvas=e||document.createElement("canvas")}},{key:"setDomain",value:function(e){if(!e||2!==e.length)throw new Error("Invalid domain specified.");this.domain=e}},{key:"setDisplayRange",value:function(e){if(!e||2!==e.length)throw new Error("Invalid view range specified.");this.displayRange=e,this.applyDisplayRange=!0}},{key:"getCanvas",value:function(){return this.canvas}},{key:"setColorScale",value:function(e){if(!hasOwnProperty(_colorscales.colorscales,e))throw new Error("No such color scale '".concat(e,"'"));this.colorScaleCanvas||(this.colorScaleCanvas=document.createElement("canvas"),this.colorScaleCanvas.width=256,this.colorScaleCanvas.height=1),renderColorScaleToCanvas(e,this.colorScaleCanvas),this.name=e,this.setColorScaleImage(this.colorScaleCanvas)}},{key:"setClamp",value:function(e,t){this.clampLow=e,this.clampHigh=void 0!==t?t:e}},{key:"setColorScaleImage",value:function(e){this.colorScaleImage=e;var t=this.gl;t&&(this.textureScale&&t.deleteTexture(this.textureScale),this.textureScale=t.createTexture(),t.bindTexture(t.TEXTURE_2D,this.textureScale),t.texParameteri(t.TEXTURE_2D,t.TEXTURE_WRAP_S,t.CLAMP_TO_EDGE),t.texParameteri(t.TEXTURE_2D,t.TEXTURE_WRAP_T,t.CLAMP_TO_EDGE),t.texParameteri(t.TEXTURE_2D,t.TEXTURE_MIN_FILTER,t.NEAREST),t.texParameteri(t.TEXTURE_2D,t.TEXTURE_MAG_FILTER,t.NEAREST),t.texImage2D(t.TEXTURE_2D,0,t.RGBA,t.RGBA,t.UNSIGNED_BYTE,e))}},{key:"setNoDataValue",value:function(e){this.noDataValue=e}},{key:"render",value:function(){var e=this.canvas,t=this.currentDataset;e.width=t.width,e.height=t.height;var a=null;if(this.expressionAst){var r=new Set([]);!function e(t){"string"==typeof t&&r.add(t.replace(new RegExp(/[+-]/,"g"),"")),"string"==typeof t.lhs?r.add(t.lhs.replace(new RegExp(/[+-]/,"g"),"")):"object"===_typeof(t.lhs)&&e(t.lhs),"string"==typeof t.rhs?r.add(t.rhs.replace(new RegExp(/[+-]/,"g"),"")):"object"===_typeof(t.rhs)&&e(t.rhs)}(this.expressionAst),a=Array.from(r)}var o=null;if(this.gl){var n=this.gl;if(n.viewport(0,0,t.width,t.height),this.expressionAst){var i=function e(t){return"object"===_typeof(t)?"**"===t.op?"pow(".concat(e(t.lhs),", ").concat(e(t.rhs),")"):t.fn?"(".concat(t.fn,"(").concat(e(t.lhs),"))"):"(".concat(e(t.lhs)," ").concat(t.op," ").concat(e(t.rhs),")"):"string"==typeof t?"".concat(t,"_value"):"float(".concat(t,")")}(this.expressionAst),l="\n        precision mediump float;\n        // our texture\n        uniform sampler2D u_textureScale;\n\n        // add all required textures\n".concat(a.map(function(e){return"        uniform sampler2D u_texture_".concat(e,";")}).join("\n"),"\n\n        uniform vec2 u_textureSize;\n        uniform vec2 u_domain;\n        uniform float u_noDataValue;\n        uniform bool u_clampLow;\n        uniform bool u_clampHigh;\n        // the texCoords passed in from the vertex shader.\n        varying vec2 v_texCoord;\n        void main() {\n").concat(a.map(function(e){return"          float ".concat(e,"_value = texture2D(u_texture_").concat(e,", v_texCoord)[0];")}).join("\n"),"\n          float value = ").concat(i,";\n\n          if (value == u_noDataValue)\n            gl_FragColor = vec4(0.0, 0, 0, 0.0);\n          else if ((!u_clampLow && value < u_domain[0]) || (!u_clampHigh && value > u_domain[1]))\n            gl_FragColor = vec4(0, 0, 0, 0);\n          else {\n            float normalisedValue = (value - u_domain[0]) / (u_domain[1] - u_domain[0]);\n            gl_FragColor = texture2D(u_textureScale, vec2(normalisedValue, 0));\n          }\n        }");o=createProgram(n,vertexShaderSource,l),n.useProgram(o),n.uniform1i(n.getUniformLocation(o,"u_textureScale"),0),n.activeTexture(n.TEXTURE0),n.bindTexture(n.TEXTURE_2D,this.textureScale);for(var s=0;s<a.length;++s){var c=s+1,u=a[s],h=this.datasetCollection[u];if(!h)throw new Error("No such dataset registered: '".concat(u,"'"));n.uniform1i(n.getUniformLocation(o,"u_texture_".concat(u)),c),n.activeTexture(n["TEXTURE".concat(c)]),n.bindTexture(n.TEXTURE_2D,h.textureData)}}else o=this.program,n.useProgram(o),n.uniform1i(n.getUniformLocation(o,"u_textureData"),0),n.uniform1i(n.getUniformLocation(o,"u_textureScale"),1),n.activeTexture(n.TEXTURE0),n.bindTexture(n.TEXTURE_2D,t.textureData),n.activeTexture(n.TEXTURE1),n.bindTexture(n.TEXTURE_2D,this.textureScale);var d=n.getAttribLocation(o,"a_position"),f=n.getUniformLocation(o,"u_domain"),m=n.getUniformLocation(o,"u_display_range"),v=n.getUniformLocation(o,"u_apply_display_range"),p=n.getUniformLocation(o,"u_resolution"),g=n.getUniformLocation(o,"u_noDataValue"),_=n.getUniformLocation(o,"u_clampLow"),x=n.getUniformLocation(o,"u_clampHigh"),E=n.getUniformLocation(o,"u_matrix");n.uniform2f(p,e.width,e.height),n.uniform2fv(f,this.domain),n.uniform2fv(m,this.displayRange),n.uniform1i(v,this.applyDisplayRange),n.uniform1i(_,this.clampLow),n.uniform1i(x,this.clampHigh),n.uniform1f(g,this.noDataValue),n.uniformMatrix3fv(E,!1,this.matrix);var T=n.createBuffer();n.bindBuffer(n.ARRAY_BUFFER,T),n.enableVertexAttribArray(d),n.vertexAttribPointer(d,2,n.FLOAT,!1,0,0),setRectangle(n,0,0,e.width,e.height),n.drawArrays(n.TRIANGLES,0,6)}else if(this.ctx){for(var D,y=this.ctx,C=e.width,S=e.height,w=y.createImageData(C,S),R=this.domain[1]-this.domain[0],A=this.colorScaleCanvas.width,b=this.colorScaleCanvas.getContext("2d").getImageData(0,0,A,1).data,U=t.data,P=0;P<S;P++)for(var L=0;L<C;L++){var F=P*C+L,I=Math.floor((U[F]-this.domain[0])/R*(A-1));D=255,I<0?(I=0,this.clampLow||(D=0)):I>255&&(I=255,this.clampHigh||(D=0)),U[F]===this.noDataValue||U[F]!=U[F]?D=0:this.applyDisplayRange&&(U[F]<this.displayRange[0]||U[F]>=this.displayRange[1])&&(D=0);var X=4*(P*C+L);w.data[X+0]=b[4*I],w.data[X+1]=b[4*I+1],w.data[X+2]=b[4*I+2],w.data[X+3]=Math.min(D,b[4*I+3])}y.putImageData(w,0,0)}}},{key:"renderDataset",value:function(e){return this.setCurrentDataset(e),this.render()}},{key:"getColor",value:function(e){var t=this.colorScaleCanvas.width,a=this.colorScaleCanvas.getContext("2d").getImageData(0,0,t,1).data,r=this.domain[1]-this.domain[0],o=Math.round((e-this.domain[0])/r*t),n=255;return o<0&&(o=0,this.clampLow||(n=0)),o>255&&(o=255,this.clampHigh||(n=0)),[a[4*o],a[4*o+1],a[4*o+2],n]}},{key:"setExpression",value:function(e){e&&e.length?this.expressionAst=(0,_arithmeticsParser.parse)(e):this.expressionAst=null}}]),e}();exports.plot=plot;

  },{"./arithmetics-parser":1,"./colorscales":2}]},{},[3])(3)
  });