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AMD, CommonJS/Node.js and browser context\n  if (typeof module !== \"undefined\" && module.exports) {\n    module.exports = factory();\n  } else if (typeof define === \"function\" && define.amd) {\n    define(factory);\n  } else {\n    context[name] = factory();\n  }\n\n})(\"h337\", this, function () {\n\n// Heatmap Config stores default values and will be merged with instance config\nvar HeatmapConfig = {\n  defaultRadius: 40,\n  defaultRenderer: 'canvas2d',\n  defaultGradient: { 0.25: \"rgb(0,0,255)\", 0.55: \"rgb(0,255,0)\", 0.85: \"yellow\", 1.0: \"rgb(255,0,0)\"},\n  defaultMaxOpacity: 1,\n  defaultMinOpacity: 0,\n  defaultBlur: .85,\n  defaultXField: 'x',\n  defaultYField: 'y',\n  defaultValueField: 'value', \n  plugins: {}\n};\nvar Store = (function StoreClosure() {\n\n  var Store = function Store(config) {\n    this._coordinator = {};\n    this._data = [];\n    this._radi = [];\n    this._min = 10;\n    this._max = 1;\n    this._xField = config['xField'] || config.defaultXField;\n    this._yField = config['yField'] || config.defaultYField;\n    this._valueField = config['valueField'] || config.defaultValueField;\n\n    if (config[\"radius\"]) {\n      this._cfgRadius = config[\"radius\"];\n    }\n  };\n\n  var defaultRadius = HeatmapConfig.defaultRadius;\n\n  Store.prototype = {\n    // when forceRender = false -> called from setData, omits renderall event\n    _organiseData: function(dataPoint, forceRender) {\n        var x = dataPoint[this._xField];\n        var y = dataPoint[this._yField];\n        var radi = this._radi;\n        var store = this._data;\n        var max = this._max;\n        var min = this._min;\n        var value = dataPoint[this._valueField] || 1;\n        var radius = dataPoint.radius || this._cfgRadius || defaultRadius;\n\n        if (!store[x]) {\n          store[x] = [];\n          radi[x] = [];\n        }\n\n        if (!store[x][y]) {\n          store[x][y] = value;\n          radi[x][y] = radius;\n        } else {\n          store[x][y] += value;\n        }\n        var storedVal = store[x][y];\n\n        if (storedVal > max) {\n          if (!forceRender) {\n            this._max = storedVal;\n          } else {\n            this.setDataMax(storedVal);\n          }\n          return false;\n        } else if (storedVal < min) {\n          if (!forceRender) {\n            this._min = storedVal;\n          } else {\n            this.setDataMin(storedVal);\n          }\n          return false;\n        } else {\n          return { \n            x: x, \n            y: y,\n            value: value, \n            radius: radius,\n            min: min,\n            max: max \n          };\n        }\n    },\n    _unOrganizeData: function() {\n      var unorganizedData = [];\n      var data = this._data;\n      var radi = this._radi;\n\n      for (var x in data) {\n        for (var y in data[x]) {\n\n          unorganizedData.push({\n            x: x,\n            y: y,\n            radius: radi[x][y],\n            value: data[x][y]\n          });\n\n        }\n      }\n      return {\n        min: this._min,\n        max: this._max,\n        data: unorganizedData\n      };\n    },\n    _onExtremaChange: function() {\n      this._coordinator.emit('extremachange', {\n        min: this._min,\n        max: this._max\n      });\n    },\n    addData: function() {\n      if (arguments[0].length > 0) {\n        var dataArr = arguments[0];\n        var dataLen = dataArr.length;\n        while (dataLen--) {\n          this.addData.call(this, dataArr[dataLen]);\n        }\n      } else {\n        // add to store  \n        var organisedEntry = this._organiseData(arguments[0], true);\n        if (organisedEntry) {\n          // if it's the first datapoint initialize the extremas with it\n          if (this._data.length === 0) {\n            this._min = this._max = organisedEntry.value;\n          }\n          this._coordinator.emit('renderpartial', {\n            min: this._min,\n            max: this._max,\n            data: [organisedEntry]\n          });\n        }\n      }\n      return this;\n    },\n    setData: function(data) {\n      var dataPoints = data.data;\n      var pointsLen = dataPoints.length;\n\n\n      // reset data arrays\n      this._data = [];\n      this._radi = [];\n\n      for(var i = 0; i < pointsLen; i++) {\n        this._organiseData(dataPoints[i], false);\n      }\n      this._max = data.max;\n      this._min = data.min || 0;\n      \n      this._onExtremaChange();\n      this._coordinator.emit('renderall', this._getInternalData());\n      return this;\n    },\n    removeData: function() {\n      // TODO: implement\n    },\n    setDataMax: function(max) {\n      this._max = max;\n      this._onExtremaChange();\n      this._coordinator.emit('renderall', this._getInternalData());\n      return this;\n    },\n    setDataMin: function(min) {\n      this._min = min;\n      this._onExtremaChange();\n      this._coordinator.emit('renderall', this._getInternalData());\n      return this;\n    },\n    setCoordinator: function(coordinator) {\n      this._coordinator = coordinator;\n    },\n    _getInternalData: function() {\n      return { \n        max: this._max,\n        min: this._min, \n        data: this._data,\n        radi: this._radi \n      };\n    },\n    getData: function() {\n      return this._unOrganizeData();\n    }/*,\n\n      TODO: rethink.\n\n    getValueAt: function(point) {\n      var value;\n      var radius = 100;\n      var x = point.x;\n      var y = point.y;\n      var data = this._data;\n\n      if (data[x] && data[x][y]) {\n        return data[x][y];\n      } else {\n        var values = [];\n        // radial search for datapoints based on default radius\n        for(var distance = 1; distance < radius; distance++) {\n          var neighbors = distance * 2 +1;\n          var startX = x - distance;\n          var startY = y - distance;\n\n          for(var i = 0; i < neighbors; i++) {\n            for (var o = 0; o < neighbors; o++) {\n              if ((i == 0 || i == neighbors-1) || (o == 0 || o == neighbors-1)) {\n                if (data[startY+i] && data[startY+i][startX+o]) {\n                  values.push(data[startY+i][startX+o]);\n                }\n              } else {\n                continue;\n              } \n            }\n          }\n        }\n        if (values.length > 0) {\n          return Math.max.apply(Math, values);\n        }\n      }\n      return false;\n    }*/\n  };\n\n\n  return Store;\n})();\n\nvar Canvas2dRenderer = (function Canvas2dRendererClosure() {\n\n  var _getColorPalette = function(config) {\n    var gradientConfig = config.gradient || config.defaultGradient;\n    var paletteCanvas = document.createElement('canvas');\n    var paletteCtx = paletteCanvas.getContext('2d');\n\n    paletteCanvas.width = 256;\n    paletteCanvas.height = 1;\n\n    var gradient = paletteCtx.createLinearGradient(0, 0, 256, 1);\n    for (var key in gradientConfig) {\n      gradient.addColorStop(key, gradientConfig[key]);\n    }\n\n    paletteCtx.fillStyle = gradient;\n    paletteCtx.fillRect(0, 0, 256, 1);\n\n    return paletteCtx.getImageData(0, 0, 256, 1).data;\n  };\n\n  var _getPointTemplate = function(radius, blurFactor) {\n    var tplCanvas = document.createElement('canvas');\n    var tplCtx = tplCanvas.getContext('2d');\n    var x = radius;\n    var y = radius;\n    tplCanvas.width = tplCanvas.height = radius*2;\n\n    if (blurFactor == 1) {\n      tplCtx.beginPath();\n      tplCtx.arc(x, y, radius, 0, 2 * Math.PI, false);\n      tplCtx.fillStyle = 'rgba(0,0,0,1)';\n      tplCtx.fill();\n    } else {\n      var gradient = tplCtx.createRadialGradient(x, y, radius*blurFactor, x, y, radius);\n      gradient.addColorStop(0, 'rgba(0,0,0,1)');\n      gradient.addColorStop(1, 'rgba(0,0,0,0)');\n      tplCtx.fillStyle = gradient;\n      tplCtx.fillRect(0, 0, 2*radius, 2*radius);\n    }\n\n\n\n    return tplCanvas;\n  };\n\n  var _prepareData = function(data) {\n    var renderData = [];\n    var min = data.min;\n    var max = data.max;\n    var radi = data.radi;\n    var data = data.data;\n\n    var xValues = Object.keys(data);\n    var xValuesLen = xValues.length;\n\n    while(xValuesLen--) {\n      var xValue = xValues[xValuesLen];\n      var yValues = Object.keys(data[xValue]);\n      var yValuesLen = yValues.length;\n      while(yValuesLen--) {\n        var yValue = yValues[yValuesLen];\n        var value = data[xValue][yValue];\n        var radius = radi[xValue][yValue];\n        renderData.push({\n          x: xValue,\n          y: yValue,\n          value: value,\n          radius: radius\n        });\n      }\n    }\n\n    return {\n      min: min,\n      max: max,\n      data: renderData\n    };\n  };\n\n\n  function Canvas2dRenderer(config) {\n    var container = config.container;\n    var shadowCanvas = this.shadowCanvas = document.createElement('canvas');\n    var canvas = this.canvas = config.canvas || document.createElement('canvas');\n    var renderBoundaries = this._renderBoundaries = [10000, 10000, 0, 0];\n\n    var computed = getComputedStyle(config.container) || {};\n\n    canvas.className = 'heatmap-canvas';\n\n    this._width = canvas.width = shadowCanvas.width = config.width || +(computed.width.replace(/px/,''));\n    this._height = canvas.height = shadowCanvas.height = config.height || +(computed.height.replace(/px/,''));\n\n    this.shadowCtx = shadowCanvas.getContext('2d');\n    this.ctx = canvas.getContext('2d');\n\n    // @TODO:\n    // conditional wrapper\n\n    canvas.style.cssText = shadowCanvas.style.cssText = 'position:absolute;left:0;top:0;';\n\n    container.style.position = 'relative';\n    container.appendChild(canvas);\n\n    this._palette = _getColorPalette(config);\n    this._templates = {};\n\n    this._setStyles(config);\n  };\n\n  Canvas2dRenderer.prototype = {\n    renderPartial: function(data) {\n      if (data.data.length > 0) {\n        this._drawAlpha(data);\n        this._colorize();\n      }\n    },\n    renderAll: function(data) {\n      // reset render boundaries\n      this._clear();\n      if (data.data.length > 0) {\n        this._drawAlpha(_prepareData(data));\n        this._colorize();\n      }\n    },\n    _updateGradient: function(config) {\n      this._palette = _getColorPalette(config);\n    },\n    updateConfig: function(config) {\n      if (config['gradient']) {\n        this._updateGradient(config);\n      }\n      this._setStyles(config);\n    },\n    setDimensions: function(width, height) {\n      this._width = width;\n      this._height = height;\n      this.canvas.width = this.shadowCanvas.width = width;\n      this.canvas.height = this.shadowCanvas.height = height;\n    },\n    _clear: function() {\n      this.shadowCtx.clearRect(0, 0, this._width, this._height);\n      this.ctx.clearRect(0, 0, this._width, this._height);\n    },\n    _setStyles: function(config) {\n      this._blur = (config.blur == 0)?0:(config.blur || config.defaultBlur);\n\n      if (config.backgroundColor) {\n        this.canvas.style.backgroundColor = config.backgroundColor;\n      }\n\n      this._width = this.canvas.width = this.shadowCanvas.width = config.width || this._width;\n      this._height = this.canvas.height = this.shadowCanvas.height = config.height || this._height;\n\n\n      this._opacity = (config.opacity || 0) * 255;\n      this._maxOpacity = (config.maxOpacity || config.defaultMaxOpacity) * 255;\n      this._minOpacity = (config.minOpacity || config.defaultMinOpacity) * 255;\n      this._useGradientOpacity = !!config.useGradientOpacity;\n    },\n    _drawAlpha: function(data) {\n      var min = this._min = data.min;\n      var max = this._max = data.max;\n      var data = data.data || [];\n      var dataLen = data.length;\n      // on a point basis?\n      var blur = 1 - this._blur;\n\n      while(dataLen--) {\n\n        var point = data[dataLen];\n\n        var x = point.x;\n        var y = point.y;\n        var radius = point.radius;\n        // if value is bigger than max\n        // use max as value\n        var value = Math.min(point.value, max);\n        var rectX = x - radius;\n        var rectY = y - radius;\n        var shadowCtx = this.shadowCtx;\n\n\n\n\n        var tpl;\n        if (!this._templates[radius]) {\n          this._templates[radius] = tpl = _getPointTemplate(radius, blur);\n        } else {\n          tpl = this._templates[radius];\n        }\n        // value from minimum / value range\n        // => [0, 1]\n        var templateAlpha = (value-min)/(max-min);\n        // this fixes #176: small values are not visible because globalAlpha < .01 cannot be read from imageData\n        shadowCtx.globalAlpha = templateAlpha < .01 ? .01 : templateAlpha;\n\n        shadowCtx.drawImage(tpl, rectX, rectY);\n\n        // update renderBoundaries\n        if (rectX < this._renderBoundaries[0]) {\n            this._renderBoundaries[0] = rectX;\n          }\n          if (rectY < this._renderBoundaries[1]) {\n            this._renderBoundaries[1] = rectY;\n          }\n          if (rectX + 2*radius > this._renderBoundaries[2]) {\n            this._renderBoundaries[2] = rectX + 2*radius;\n          }\n          if (rectY + 2*radius > this._renderBoundaries[3]) {\n            this._renderBoundaries[3] = rectY + 2*radius;\n          }\n\n      }\n    },\n    _colorize: function() {\n      var x = this._renderBoundaries[0];\n      var y = this._renderBoundaries[1];\n      var width = this._renderBoundaries[2] - x;\n      var height = this._renderBoundaries[3] - y;\n      var maxWidth = this._width;\n      var maxHeight = this._height;\n      var opacity = this._opacity;\n      var maxOpacity = this._maxOpacity;\n      var minOpacity = this._minOpacity;\n      var useGradientOpacity = this._useGradientOpacity;\n\n      if (x < 0) {\n        x = 0;\n      }\n      if (y < 0) {\n        y = 0;\n      }\n      if (x + width > maxWidth) {\n        width = maxWidth - x;\n      }\n      if (y + height > maxHeight) {\n        height = maxHeight - y;\n      }\n\n      var img = this.shadowCtx.getImageData(x, y, width, height);\n      var imgData = img.data;\n      var len = imgData.length;\n      var palette = this._palette;\n\n\n      for (var i = 3; i < len; i+= 4) {\n        var alpha = imgData[i];\n        var offset = alpha * 4;\n\n\n        if (!offset) {\n          continue;\n        }\n\n        var finalAlpha;\n        if (opacity > 0) {\n          finalAlpha = opacity;\n        } else {\n          if (alpha < maxOpacity) {\n            if (alpha < minOpacity) {\n              finalAlpha = minOpacity;\n            } else {\n              finalAlpha = alpha;\n            }\n          } else {\n            finalAlpha = maxOpacity;\n          }\n        }\n\n        imgData[i-3] = palette[offset];\n        imgData[i-2] = palette[offset + 1];\n        imgData[i-1] = palette[offset + 2];\n        imgData[i] = useGradientOpacity ? palette[offset + 3] : finalAlpha;\n\n      }\n\n      img.data = imgData;\n      this.ctx.putImageData(img, x, y);\n\n      this._renderBoundaries = [1000, 1000, 0, 0];\n\n    },\n    getValueAt: function(point) {\n      var value;\n      var shadowCtx = this.shadowCtx;\n      var img = shadowCtx.getImageData(point.x, point.y, 1, 1);\n      var data = img.data[3];\n      var max = this._max;\n      var min = this._min;\n\n      value = (Math.abs(max-min) * (data/255)) >> 0;\n\n      return value;\n    },\n    getDataURL: function() {\n      return this.canvas.toDataURL();\n    }\n  };\n\n\n  return Canvas2dRenderer;\n})();\n\n\nvar Renderer = (function RendererClosure() {\n\n  var rendererFn = false;\n\n  if (HeatmapConfig['defaultRenderer'] === 'canvas2d') {\n    rendererFn = Canvas2dRenderer;\n  }\n\n  return rendererFn;\n})();\n\n\nvar Util = {\n  merge: function() {\n    var merged = {};\n    var argsLen = arguments.length;\n    for (var i = 0; i < argsLen; i++) {\n      var obj = arguments[i]\n      for (var key in obj) {\n        merged[key] = obj[key];\n      }\n    }\n    return merged;\n  }\n};\n// Heatmap Constructor\nvar Heatmap = (function HeatmapClosure() {\n\n  var Coordinator = (function CoordinatorClosure() {\n\n    function Coordinator() {\n      this.cStore = {};\n    };\n\n    Coordinator.prototype = {\n      on: function(evtName, callback, scope) {\n        var cStore = this.cStore;\n\n        if (!cStore[evtName]) {\n          cStore[evtName] = [];\n        }\n        cStore[evtName].push((function(data) {\n            return callback.call(scope, data);\n        }));\n      },\n      emit: function(evtName, data) {\n        var cStore = this.cStore;\n        if (cStore[evtName]) {\n          var len = cStore[evtName].length;\n          for (var i=0; i<len; i++) {\n            var callback = cStore[evtName][i];\n            callback(data);\n          }\n        }\n      }\n    };\n\n    return Coordinator;\n  })();\n\n\n  var _connect = function(scope) {\n    var renderer = scope._renderer;\n    var coordinator = scope._coordinator;\n    var store = scope._store;\n\n    coordinator.on('renderpartial', renderer.renderPartial, renderer);\n    coordinator.on('renderall', renderer.renderAll, renderer);\n    coordinator.on('extremachange', function(data) {\n      scope._config.onExtremaChange &&\n      scope._config.onExtremaChange({\n        min: data.min,\n        max: data.max,\n        gradient: scope._config['gradient'] || scope._config['defaultGradient']\n      });\n    });\n    store.setCoordinator(coordinator);\n  };\n\n\n  function Heatmap() {\n    var config = this._config = Util.merge(HeatmapConfig, arguments[0] || {});\n    this._coordinator = new Coordinator();\n    if (config['plugin']) {\n      var pluginToLoad = config['plugin'];\n      if (!HeatmapConfig.plugins[pluginToLoad]) {\n        throw new Error('Plugin \\''+ pluginToLoad + '\\' not found. Maybe it was not registered.');\n      } else {\n        var plugin = HeatmapConfig.plugins[pluginToLoad];\n        // set plugin renderer and store\n        this._renderer = new plugin.renderer(config);\n        this._store = new plugin.store(config);\n      }\n    } else {\n      this._renderer = new Renderer(config);\n      this._store = new Store(config);\n    }\n    _connect(this);\n  };\n\n  // @TODO:\n  // add API documentation\n  Heatmap.prototype = {\n    addData: function() {\n      this._store.addData.apply(this._store, arguments);\n      return this;\n    },\n    removeData: function() {\n      this._store.removeData && this._store.removeData.apply(this._store, arguments);\n      return this;\n    },\n    setData: function() {\n      this._store.setData.apply(this._store, arguments);\n      return this;\n    },\n    setDataMax: function() {\n      this._store.setDataMax.apply(this._store, arguments);\n      return this;\n    },\n    setDataMin: function() {\n      this._store.setDataMin.apply(this._store, arguments);\n      return this;\n    },\n    configure: function(config) {\n      this._config = Util.merge(this._config, config);\n      this._renderer.updateConfig(this._config);\n      this._coordinator.emit('renderall', this._store._getInternalData());\n      return this;\n    },\n    repaint: function() {\n      this._coordinator.emit('renderall', this._store._getInternalData());\n      return this;\n    },\n    getData: function() {\n      return this._store.getData();\n    },\n    getDataURL: function() {\n      return this._renderer.getDataURL();\n    },\n    getValueAt: function(point) {\n\n      if (this._store.getValueAt) {\n        return this._store.getValueAt(point);\n      } else  if (this._renderer.getValueAt) {\n        return this._renderer.getValueAt(point);\n      } else {\n        return null;\n      }\n    }\n  };\n\n  return Heatmap;\n\n})();\n\n\n// core\nvar heatmapFactory = {\n  create: function(config) {\n    return new Heatmap(config);\n  },\n  register: function(pluginKey, plugin) {\n    HeatmapConfig.plugins[pluginKey] = plugin;\n  }\n};\n\nreturn heatmapFactory;\n\n\n});"],"sourceRoot":""}