/** * License: www.highcharts.com/license * Author: Christer Vasseng, Torstein Honsi * * This is a Highcharts module that draws long data series on a cannvas in order * to increase performance of the initial load time and tooltip responsiveness. * * Compatible with WebGL compatible browsers (not IE < 11). * * If this module is taken in as part of the core * - All the loading logic should be merged with core. Update styles in the * core. * - Most of the method wraps should probably be added directly in parent * methods. * * Notes for boost mode * - Area lines are not drawn * - Lines are not drawn on scatter charts * - Zones and negativeColor don't work * - Dash styles are not rendered on lines. * - Columns are always one pixel wide. Don't set the threshold too low. * - Disable animations * - Marker shapes are not supported: markers will always be circles * * Optimizing tips for users * - Set extremes (min, max) explicitly on the axes in order for Highcharts to * avoid computing extremes. * - Set enableMouseTracking to false on the series to improve total rendering * time. * - The default threshold is set based on one series. If you have multiple, * dense series, the combined number of points drawn gets higher, and you may * want to set the threshold lower in order to use optimizations. * - If drawing large scatter charts, it's beneficial to set the marker radius * to a value less than 1. This is to add additional spacing to make the chart * more readable. * - If the value increments on both the X and Y axis aren't small, consider * setting useGPUTranslations to true on the boost settings object. If you do * this and the increments are small (e.g. datetime axis with small time * increments) it may cause rendering issues due to floating point rounding * errors, so your millage may vary. * * Settings * There are two ways of setting the boost threshold: * - Per series: boost based on number of points in individual series * - Per chart: boost based on the number of series * * To set the series boost threshold, set seriesBoostThreshold on the chart * object. * To set the series-specific threshold, set boostThreshold on the series * object. * * In addition, the following can be set in the boost object: * { * //Wether or not to use alpha blending * useAlpha: boolean - default: true * //Set to true to perform translations on the GPU. * //Much faster, but may cause rendering issues * //when using values far from 0 due to floating point * //rounding issues * useGPUTranslations: boolean - default: false * //Use pre-allocated buffers, much faster, * //but may cause rendering issues with some data sets * usePreallocated: boolean - default: false * } */ /** * Options for the Boost module. The Boost module allows certain series types * to be rendered by WebGL instead of the default SVG. This allows hundreds of * thousands of data points to be rendered in milliseconds. In addition to the * WebGL rendering it saves time by skipping processing and inspection of the * data wherever possible. This introduces some limitations to what features are * available in Boost mode. See [the docs]( * https://www.highcharts.com/docs/advanced-chart-features/boost-module) for * details. * * In addition to the global `boost` option, each series has a * [boostThreshold](#plotOptions.series.boostThreshold) that defines when the * boost should kick in. * * Requires the `modules/boost.js` module. * * @sample {highstock} highcharts/boost/line-series-heavy-stock * Stock chart * @sample {highstock} highcharts/boost/line-series-heavy-dynamic * Dynamic stock chart * @sample highcharts/boost/line * Line chart * @sample highcharts/boost/line-series-heavy * Line chart with hundreds of series * @sample highcharts/boost/scatter * Scatter chart * @sample highcharts/boost/area * Area chart * @sample highcharts/boost/arearange * Area range chart * @sample highcharts/boost/column * Column chart * @sample highcharts/boost/columnrange * Column range chart * @sample highcharts/boost/bubble * Bubble chart * @sample highcharts/boost/heatmap * Heat map * @sample highcharts/boost/treemap * Tree map * * @product highcharts highstock * @apioption boost */ /** * Set the series threshold for when the boost should kick in globally. * * Setting to e.g. 20 will cause the whole chart to enter boost mode * if there are 20 or more series active. When the chart is in boost mode, * every series in it will be rendered to a common canvas. This offers * a significant speed improvment in charts with a very high * amount of series. * * @type {number|null} * @default null * @apioption boost.seriesThreshold */ /** * Enable or disable boost on a chart. * * @type {boolean} * @default true * @apioption boost.enabled */ /** * Debugging options for boost. * Useful for benchmarking, and general timing. * * @apioption boost.debug */ /** * Time the series rendering. * * This outputs the time spent on actual rendering in the console when * set to true. * * @type {boolean} * @default false * @apioption boost.debug.timeRendering */ /** * Time the series processing. * * This outputs the time spent on transforming the series data to * vertex buffers when set to true. * * @type {boolean} * @default false * @apioption boost.debug.timeSeriesProcessing */ /** * Time the the WebGL setup. * * This outputs the time spent on setting up the WebGL context, * creating shaders, and textures. * * @type {boolean} * @default false * @apioption boost.debug.timeSetup */ /** * Time the building of the k-d tree. * * This outputs the time spent building the k-d tree used for * markers etc. * * Note that the k-d tree is built async, and runs post-rendering. * Following, it does not affect the performance of the rendering itself. * * @type {boolean} * @default false * @apioption boost.debug.timeKDTree */ /** * Show the number of points skipped through culling. * * When set to true, the number of points skipped in series processing * is outputted. Points are skipped if they are closer than 1 pixel from * each other. * * @type {boolean} * @default false * @apioption boost.debug.showSkipSummary */ /** * Time the WebGL to SVG buffer copy * * After rendering, the result is copied to an image which is injected * into the SVG. * * If this property is set to true, the time it takes for the buffer copy * to complete is outputted. * * @type {boolean} * @default false * @apioption boost.debug.timeBufferCopy */ /** * Enable or disable GPU translations. GPU translations are faster than doing * the translation in JavaScript. * * This option may cause rendering issues with certain datasets. * Namely, if your dataset has large numbers with small increments (such as * timestamps), it won't work correctly. This is due to floating point * precission. * * @type {boolean} * @default false * @apioption boost.useGPUTranslations */ /** * Enable or disable pre-allocation of vertex buffers. * * Enabling this will make it so that the binary data arrays required for * storing the series data will be allocated prior to transforming the data * to a WebGL-compatible format. * * This saves a copy operation on the order of O(n) and so is significantly more * performant. However, this is currently an experimental option, and may cause * visual artifacts with some datasets. * * As such, care should be taken when using this setting to make sure that * it doesn't cause any rendering glitches with the given use-case. * * @type {boolean} * @default false * @apioption boost.usePreallocated */ /** * Set the point threshold for when a series should enter boost mode. * * Setting it to e.g. 2000 will cause the series to enter boost mode when there * are 2000 or more points in the series. * * To disable boosting on the series, set the `boostThreshold` to 0. Setting it * to 1 will force boosting. * * Note that the [cropThreshold](plotOptions.series.cropThreshold) also affects * this setting. When zooming in on a series that has fewer points than the * `cropThreshold`, all points are rendered although outside the visible plot * area, and the `boostThreshold` won't take effect. * * Requires `modules/boost.js`. * * @type {number} * @default 5000 * @apioption plotOptions.series.boostThreshold */ /** * If set to true, the whole chart will be boosted if one of the series * crosses its threshold, and all the series can be boosted. * * @type {boolean} * @default true * @apioption boost.allowForce */ /** * Sets the color blending in the boost module. * * @type {string} * @default undefined * @validvalue ["add", "multiply", "darken"] * @apioption plotOptions.series.boostBlending */ /* global Float32Array */ 'use strict'; import H from '../parts/Globals.js'; import '../parts/Utilities.js'; import '../parts/Color.js'; import '../parts/Series.js'; import '../parts/Options.js'; import '../parts/Point.js'; import '../parts/Interaction.js'; var win = H.win, doc = win.document, noop = function () {}, Chart = H.Chart, Color = H.Color, Series = H.Series, seriesTypes = H.seriesTypes, objEach = H.objectEach, extend = H.extend, addEvent = H.addEvent, fireEvent = H.fireEvent, isNumber = H.isNumber, merge = H.merge, pick = H.pick, wrap = H.wrap, plotOptions = H.getOptions().plotOptions, CHUNK_SIZE = 30000, mainCanvas = doc.createElement('canvas'), index, boostable = [ 'area', 'arearange', 'column', 'columnrange', 'bar', 'line', 'scatter', 'heatmap', 'bubble', 'treemap' ], boostableMap = {}; boostable.forEach(function (item) { boostableMap[item] = 1; }); // Register color names since GL can't render those directly. Color.prototype.names = { aliceblue: '#f0f8ff', antiquewhite: '#faebd7', aqua: '#00ffff', aquamarine: '#7fffd4', azure: '#f0ffff', beige: '#f5f5dc', bisque: '#ffe4c4', black: '#000000', blanchedalmond: '#ffebcd', blue: '#0000ff', blueviolet: '#8a2be2', brown: '#a52a2a', burlywood: '#deb887', cadetblue: '#5f9ea0', chartreuse: '#7fff00', chocolate: '#d2691e', coral: '#ff7f50', cornflowerblue: '#6495ed', cornsilk: '#fff8dc', crimson: '#dc143c', cyan: '#00ffff', darkblue: '#00008b', darkcyan: '#008b8b', darkgoldenrod: '#b8860b', darkgray: '#a9a9a9', darkgreen: '#006400', darkkhaki: '#bdb76b', darkmagenta: '#8b008b', darkolivegreen: '#556b2f', darkorange: '#ff8c00', darkorchid: '#9932cc', darkred: '#8b0000', darksalmon: '#e9967a', darkseagreen: '#8fbc8f', darkslateblue: '#483d8b', darkslategray: '#2f4f4f', darkturquoise: '#00ced1', darkviolet: '#9400d3', deeppink: '#ff1493', deepskyblue: '#00bfff', dimgray: '#696969', dodgerblue: '#1e90ff', feldspar: '#d19275', firebrick: '#b22222', floralwhite: '#fffaf0', forestgreen: '#228b22', fuchsia: '#ff00ff', gainsboro: '#dcdcdc', ghostwhite: '#f8f8ff', gold: '#ffd700', goldenrod: '#daa520', gray: '#808080', green: '#008000', greenyellow: '#adff2f', honeydew: '#f0fff0', hotpink: '#ff69b4', indianred: '#cd5c5c', indigo: '#4b0082', ivory: '#fffff0', khaki: '#f0e68c', lavender: '#e6e6fa', lavenderblush: '#fff0f5', lawngreen: '#7cfc00', lemonchiffon: '#fffacd', lightblue: '#add8e6', lightcoral: '#f08080', lightcyan: '#e0ffff', lightgoldenrodyellow: '#fafad2', lightgrey: '#d3d3d3', lightgreen: '#90ee90', lightpink: '#ffb6c1', lightsalmon: '#ffa07a', lightseagreen: '#20b2aa', lightskyblue: '#87cefa', lightslateblue: '#8470ff', lightslategray: '#778899', lightsteelblue: '#b0c4de', lightyellow: '#ffffe0', lime: '#00ff00', limegreen: '#32cd32', linen: '#faf0e6', magenta: '#ff00ff', maroon: '#800000', mediumaquamarine: '#66cdaa', mediumblue: '#0000cd', mediumorchid: '#ba55d3', mediumpurple: '#9370d8', mediumseagreen: '#3cb371', mediumslateblue: '#7b68ee', mediumspringgreen: '#00fa9a', mediumturquoise: '#48d1cc', mediumvioletred: '#c71585', midnightblue: '#191970', mintcream: '#f5fffa', mistyrose: '#ffe4e1', moccasin: '#ffe4b5', navajowhite: '#ffdead', navy: '#000080', oldlace: '#fdf5e6', olive: '#808000', olivedrab: '#6b8e23', orange: '#ffa500', orangered: '#ff4500', orchid: '#da70d6', palegoldenrod: '#eee8aa', palegreen: '#98fb98', paleturquoise: '#afeeee', palevioletred: '#d87093', papayawhip: '#ffefd5', peachpuff: '#ffdab9', peru: '#cd853f', pink: '#ffc0cb', plum: '#dda0dd', powderblue: '#b0e0e6', purple: '#800080', red: '#ff0000', rosybrown: '#bc8f8f', royalblue: '#4169e1', saddlebrown: '#8b4513', salmon: '#fa8072', sandybrown: '#f4a460', seagreen: '#2e8b57', seashell: '#fff5ee', sienna: '#a0522d', silver: '#c0c0c0', skyblue: '#87ceeb', slateblue: '#6a5acd', slategray: '#708090', snow: '#fffafa', springgreen: '#00ff7f', steelblue: '#4682b4', tan: '#d2b48c', teal: '#008080', thistle: '#d8bfd8', tomato: '#ff6347', turquoise: '#40e0d0', violet: '#ee82ee', violetred: '#d02090', wheat: '#f5deb3', white: '#ffffff', whitesmoke: '#f5f5f5', yellow: '#ffff00', yellowgreen: '#9acd32' }; /** * Tolerant max() function. * * @private * @function patientMax * * @return {number} * max value */ function patientMax() { var args = Array.prototype.slice.call(arguments), r = -Number.MAX_VALUE; args.forEach(function (t) { if ( typeof t !== 'undefined' && t !== null && typeof t.length !== 'undefined' ) { // r = r < t.length ? t.length : r; if (t.length > 0) { r = t.length; return true; } } }); return r; } /** * Returns true if we should force chart series boosting * The result of this is cached in chart.boostForceChartBoost. * It's re-fetched on redraw. * * We do this because there's a lot of overhead involved when dealing * with a lot of series. * * @private * @function shouldForceChartSeriesBoosting * * @param {Highcharts.Chart} chart * * @return {boolean} */ function shouldForceChartSeriesBoosting(chart) { // If there are more than five series currently boosting, // we should boost the whole chart to avoid running out of webgl contexts. var sboostCount = 0, canBoostCount = 0, allowBoostForce = pick( chart.options.boost && chart.options.boost.allowForce, true ), series; if (typeof chart.boostForceChartBoost !== 'undefined') { return chart.boostForceChartBoost; } if (chart.series.length > 1) { for (var i = 0; i < chart.series.length; i++) { series = chart.series[i]; // Don't count series with boostThreshold set to 0 // See #8950 // Also don't count if the series is hidden. // See #9046 if (series.options.boostThreshold === 0 || series.visible === false) { continue; } // Don't count heatmap series as they are handled differently. // In the future we should make the heatmap/treemap path compatible // with forcing. See #9636. if (series.type === 'heatmap') { continue; } if (boostableMap[series.type]) { ++canBoostCount; } if (patientMax( series.processedXData, series.options.data, // series.xData, series.points ) >= (series.options.boostThreshold || Number.MAX_VALUE)) { ++sboostCount; } } } chart.boostForceChartBoost = allowBoostForce && ( ( canBoostCount === chart.series.length && sboostCount > 0 ) || sboostCount > 5 ); return chart.boostForceChartBoost; } /** * Return true if ths boost.enabled option is true * * @private * @function boostEnabled * * @param {Highcharts.Chart} chart * The chart * * @return {boolean} */ function boostEnabled(chart) { return pick( ( chart && chart.options && chart.options.boost && chart.options.boost.enabled ), true ); } /** * Returns true if the chart is in series boost mode. * * @function Highcharts.Chart#isChartSeriesBoosting * * @param {Highcharts.Chart} chart * the chart to check * * @return {boolean} * true if the chart is in series boost mode */ Chart.prototype.isChartSeriesBoosting = function () { var isSeriesBoosting, threshold = pick( this.options.boost && this.options.boost.seriesThreshold, 50 ); isSeriesBoosting = threshold <= this.series.length || shouldForceChartSeriesBoosting(this); return isSeriesBoosting; }; /** * Get the clip rectangle for a target, either a series or the chart. For the * chart, we need to consider the maximum extent of its Y axes, in case of * Highstock panes and navigator. * * @private * @function Highcharts.Chart#getBoostClipRect * * @param {Highcharts.Chart} target * * @return {Highcharts.BBoxObject} */ Chart.prototype.getBoostClipRect = function (target) { var clipBox = { x: this.plotLeft, y: this.plotTop, width: this.plotWidth, height: this.plotHeight }; if (target === this) { this.yAxis.forEach(function (yAxis) { clipBox.y = Math.min(yAxis.pos, clipBox.y); clipBox.height = Math.max( yAxis.pos - this.plotTop + yAxis.len, clipBox.height ); }, this); } return clipBox; }; /* * Returns true if the series is in boost mode * @param series {Highchart.Series} - the series to check * @returns {boolean} - true if the series is in boost mode */ /* function isSeriesBoosting(series, overrideThreshold) { return isChartSeriesBoosting(series.chart) || patientMax( series.processedXData, series.options.data, series.points ) >= ( overrideThreshold || series.options.boostThreshold || Number.MAX_VALUE ); } */ // START OF WEBGL ABSTRACTIONS /** * A static shader mimicing axis translation functions found in parts/Axis * * @private * @function GLShader * * @param {WebGLContext} gl * the context in which the shader is active * * @return {*} */ function GLShader(gl) { var vertShade = [ /* eslint-disable */ '#version 100', 'precision highp float;', 'attribute vec4 aVertexPosition;', 'attribute vec4 aColor;', 'varying highp vec2 position;', 'varying highp vec4 vColor;', 'uniform mat4 uPMatrix;', 'uniform float pSize;', 'uniform float translatedThreshold;', 'uniform bool hasThreshold;', 'uniform bool skipTranslation;', 'uniform float plotHeight;', 'uniform float xAxisTrans;', 'uniform float xAxisMin;', 'uniform float xAxisMinPad;', 'uniform float xAxisPointRange;', 'uniform float xAxisLen;', 'uniform bool xAxisPostTranslate;', 'uniform float xAxisOrdinalSlope;', 'uniform float xAxisOrdinalOffset;', 'uniform float xAxisPos;', 'uniform bool xAxisCVSCoord;', 'uniform float yAxisTrans;', 'uniform float yAxisMin;', 'uniform float yAxisMinPad;', 'uniform float yAxisPointRange;', 'uniform float yAxisLen;', 'uniform bool yAxisPostTranslate;', 'uniform float yAxisOrdinalSlope;', 'uniform float yAxisOrdinalOffset;', 'uniform float yAxisPos;', 'uniform bool yAxisCVSCoord;', 'uniform bool isBubble;', 'uniform bool bubbleSizeByArea;', 'uniform float bubbleZMin;', 'uniform float bubbleZMax;', 'uniform float bubbleZThreshold;', 'uniform float bubbleMinSize;', 'uniform float bubbleMaxSize;', 'uniform bool bubbleSizeAbs;', 'uniform bool isInverted;', 'float bubbleRadius(){', 'float value = aVertexPosition.w;', 'float zMax = bubbleZMax;', 'float zMin = bubbleZMin;', 'float radius = 0.0;', 'float pos = 0.0;', 'float zRange = zMax - zMin;', 'if (bubbleSizeAbs){', 'value = value - bubbleZThreshold;', 'zMax = max(zMax - bubbleZThreshold, zMin - bubbleZThreshold);', 'zMin = 0.0;', '}', 'if (value < zMin){', 'radius = bubbleZMin / 2.0 - 1.0;', '} else {', 'pos = zRange > 0.0 ? (value - zMin) / zRange : 0.5;', 'if (bubbleSizeByArea && pos > 0.0){', 'pos = sqrt(pos);', '}', 'radius = ceil(bubbleMinSize + pos * (bubbleMaxSize - bubbleMinSize)) / 2.0;', '}', 'return radius * 2.0;', '}', 'float translate(float val,', 'float pointPlacement,', 'float localA,', 'float localMin,', 'float minPixelPadding,', 'float pointRange,', 'float len,', 'bool cvsCoord', '){', 'float sign = 1.0;', 'float cvsOffset = 0.0;', 'if (cvsCoord) {', 'sign *= -1.0;', 'cvsOffset = len;', '}', 'return sign * (val - localMin) * localA + cvsOffset + ', '(sign * minPixelPadding);',//' + localA * pointPlacement * pointRange;', '}', 'float xToPixels(float value){', 'if (skipTranslation){', 'return value;// + xAxisPos;', '}', 'return translate(value, 0.0, xAxisTrans, xAxisMin, xAxisMinPad, xAxisPointRange, xAxisLen, xAxisCVSCoord);// + xAxisPos;', '}', 'float yToPixels(float value, float checkTreshold){', 'float v;', 'if (skipTranslation){', 'v = value;// + yAxisPos;', '} else {', 'v = translate(value, 0.0, yAxisTrans, yAxisMin, yAxisMinPad, yAxisPointRange, yAxisLen, yAxisCVSCoord);// + yAxisPos;', 'if (v > plotHeight) {', 'v = plotHeight;', '}', '}', 'if (checkTreshold > 0.0 && hasThreshold) {', 'v = min(v, translatedThreshold);', '}', 'return v;', '}', 'void main(void) {', 'if (isBubble){', 'gl_PointSize = bubbleRadius();', '} else {', 'gl_PointSize = pSize;', '}', //'gl_PointSize = 10.0;', 'vColor = aColor;', 'if (isInverted) {', 'gl_Position = uPMatrix * vec4(xToPixels(aVertexPosition.y) + yAxisPos, yToPixels(aVertexPosition.x, aVertexPosition.z) + xAxisPos, 0.0, 1.0);', '} else {', 'gl_Position = uPMatrix * vec4(xToPixels(aVertexPosition.x) + xAxisPos, yToPixels(aVertexPosition.y, aVertexPosition.z) + yAxisPos, 0.0, 1.0);', '}', //'gl_Position = uPMatrix * vec4(aVertexPosition.x, aVertexPosition.y, 0.0, 1.0);', '}' /* eslint-enable */ ].join('\n'), // Fragment shader source fragShade = [ /* eslint-disable */ 'precision highp float;', 'uniform vec4 fillColor;', 'varying highp vec2 position;', 'varying highp vec4 vColor;', 'uniform sampler2D uSampler;', 'uniform bool isCircle;', 'uniform bool hasColor;', // 'vec4 toColor(float value, vec2 point) {', // 'return vec4(0.0, 0.0, 0.0, 0.0);', // '}', 'void main(void) {', 'vec4 col = fillColor;', 'vec4 tcol;', 'if (hasColor) {', 'col = vColor;', '}', 'if (isCircle) {', 'tcol = texture2D(uSampler, gl_PointCoord.st);', 'col *= tcol;', 'if (tcol.r < 0.0) {', 'discard;', '} else {', 'gl_FragColor = col;', '}', '} else {', 'gl_FragColor = col;', '}', '}' /* eslint-enable */ ].join('\n'), uLocations = {}, // The shader program shaderProgram, // Uniform handle to the perspective matrix pUniform, // Uniform for point size psUniform, // Uniform for fill color fillColorUniform, // Uniform for isBubble isBubbleUniform, // Uniform for bubble abs sizing bubbleSizeAbsUniform, bubbleSizeAreaUniform, // Skip translation uniform skipTranslationUniform, // Set to 1 if circle isCircleUniform, // Uniform for invertion isInverted, plotHeightUniform, // Error stack errors = [], // Texture uniform uSamplerUniform; /* * Handle errors accumulated in errors stack */ function handleErrors() { if (errors.length) { H.error('[highcharts boost] shader error - ' + errors.join('\n')); } } /* String to shader program * @param {string} str - the program source * @param {string} type - the program type: either `vertex` or `fragment` * @returns {bool|shader} */ function stringToProgram(str, type) { var t = type === 'vertex' ? gl.VERTEX_SHADER : gl.FRAGMENT_SHADER, shader = gl.createShader(t); gl.shaderSource(shader, str); gl.compileShader(shader); if (!gl.getShaderParameter(shader, gl.COMPILE_STATUS)) { errors.push( 'when compiling ' + type + ' shader:\n' + gl.getShaderInfoLog(shader) ); return false; } return shader; } /* * Create the shader. * Loads the shader program statically defined above */ function createShader() { var v = stringToProgram(vertShade, 'vertex'), f = stringToProgram(fragShade, 'fragment'); if (!v || !f) { shaderProgram = false; handleErrors(); return false; } function uloc(n) { return gl.getUniformLocation(shaderProgram, n); } shaderProgram = gl.createProgram(); gl.attachShader(shaderProgram, v); gl.attachShader(shaderProgram, f); gl.linkProgram(shaderProgram); if (!gl.getProgramParameter(shaderProgram, gl.LINK_STATUS)) { errors.push(gl.getProgramInfoLog(shaderProgram)); handleErrors(); shaderProgram = false; return false; } gl.useProgram(shaderProgram); gl.bindAttribLocation(shaderProgram, 0, 'aVertexPosition'); pUniform = uloc('uPMatrix'); psUniform = uloc('pSize'); fillColorUniform = uloc('fillColor'); isBubbleUniform = uloc('isBubble'); bubbleSizeAbsUniform = uloc('bubbleSizeAbs'); bubbleSizeAreaUniform = uloc('bubbleSizeByArea'); uSamplerUniform = uloc('uSampler'); skipTranslationUniform = uloc('skipTranslation'); isCircleUniform = uloc('isCircle'); isInverted = uloc('isInverted'); plotHeightUniform = uloc('plotHeight'); return true; } /* * Destroy the shader */ function destroy() { if (gl && shaderProgram) { gl.deleteProgram(shaderProgram); shaderProgram = false; } } /* * Bind the shader. * This makes the shader the active one until another one is bound, * or until 0 is bound. */ function bind() { if (gl && shaderProgram) { gl.useProgram(shaderProgram); } } /* * Set a uniform value. * This uses a hash map to cache uniform locations. * @param name {string} - the name of the uniform to set * @param val {float} - the value to set */ function setUniform(name, val) { if (gl && shaderProgram) { var u = uLocations[name] = uLocations[name] || gl.getUniformLocation( shaderProgram, name ); gl.uniform1f(u, val); } } /* * Set the active texture * @param texture - the texture */ function setTexture(texture) { if (gl && shaderProgram) { gl.uniform1i(uSamplerUniform, texture); } } /* * Set if inversion state * @flag is the state */ function setInverted(flag) { if (gl && shaderProgram) { gl.uniform1i(isInverted, flag); } } /* * Enable/disable circle drawing */ function setDrawAsCircle(flag) { if (gl && shaderProgram) { gl.uniform1i(isCircleUniform, flag ? 1 : 0); } } function setPlotHeight(n) { if (gl && shaderProgram) { gl.uniform1f(plotHeightUniform, n); } } /* * Flush */ function reset() { if (gl && shaderProgram) { gl.uniform1i(isBubbleUniform, 0); gl.uniform1i(isCircleUniform, 0); } } /* * Set bubble uniforms * @param series {Highcharts.Series} - the series to use */ function setBubbleUniforms(series, zCalcMin, zCalcMax) { var seriesOptions = series.options, zMin = Number.MAX_VALUE, zMax = -Number.MAX_VALUE; if (gl && shaderProgram && series.type === 'bubble') { zMin = pick(seriesOptions.zMin, Math.min( zMin, Math.max( zCalcMin, seriesOptions.displayNegative === false ? seriesOptions.zThreshold : -Number.MAX_VALUE ) )); zMax = pick(seriesOptions.zMax, Math.max(zMax, zCalcMax)); gl.uniform1i(isBubbleUniform, 1); gl.uniform1i(isCircleUniform, 1); gl.uniform1i( bubbleSizeAreaUniform, series.options.sizeBy !== 'width' ); gl.uniform1i( bubbleSizeAbsUniform, series.options.sizeByAbsoluteValue ); setUniform('bubbleZMin', zMin); setUniform('bubbleZMax', zMax); setUniform('bubbleZThreshold', series.options.zThreshold); setUniform('bubbleMinSize', series.minPxSize); setUniform('bubbleMaxSize', series.maxPxSize); } } /* * Set the Color uniform. * @param color {Array} - an array with RGBA values */ function setColor(color) { if (gl && shaderProgram) { gl.uniform4f( fillColorUniform, color[0] / 255.0, color[1] / 255.0, color[2] / 255.0, color[3] ); } } /* * Set skip translation */ function setSkipTranslation(flag) { if (gl && shaderProgram) { gl.uniform1i(skipTranslationUniform, flag === true ? 1 : 0); } } /* * Set the perspective matrix * @param m {Matrix4x4} - the matrix */ function setPMatrix(m) { if (gl && shaderProgram) { gl.uniformMatrix4fv(pUniform, false, m); } } /* * Set the point size. * @param p {float} - point size */ function setPointSize(p) { if (gl && shaderProgram) { gl.uniform1f(psUniform, p); } } /* * Get the shader program handle * @returns {GLInt} - the handle for the program */ function getProgram() { return shaderProgram; } if (gl) { if (!createShader()) { return false; } } return { psUniform: function () { return psUniform; }, pUniform: function () { return pUniform; }, fillColorUniform: function () { return fillColorUniform; }, setPlotHeight: setPlotHeight, setBubbleUniforms: setBubbleUniforms, bind: bind, program: getProgram, create: createShader, setUniform: setUniform, setPMatrix: setPMatrix, setColor: setColor, setPointSize: setPointSize, setSkipTranslation: setSkipTranslation, setTexture: setTexture, setDrawAsCircle: setDrawAsCircle, reset: reset, setInverted: setInverted, destroy: destroy }; } /** * Vertex Buffer abstraction. * A vertex buffer is a set of vertices which are passed to the GPU * in a single call. * * @private * @function GLVertexBuffer * * @param {WebGLContext} gl * the context in which to create the buffer * * @param {GLShader} shader * the shader to use * * @return {*} */ function GLVertexBuffer(gl, shader, dataComponents /* , type */) { var buffer = false, vertAttribute = false, components = dataComponents || 2, preAllocated = false, iterator = 0, // farray = false, data; // type = type || 'float'; function destroy() { if (buffer) { gl.deleteBuffer(buffer); buffer = false; vertAttribute = false; } iterator = 0; components = dataComponents || 2; data = []; } /* * Build the buffer * @param dataIn {Array} - a 0 padded array of indices * @param attrib {String} - the name of the Attribute to bind the buffer to * @param dataComponents {Integer} - the number of components per. indice */ function build(dataIn, attrib, dataComponents) { var farray; data = dataIn || []; if ((!data || data.length === 0) && !preAllocated) { // console.error('trying to render empty vbuffer'); destroy(); return false; } components = dataComponents || components; if (buffer) { gl.deleteBuffer(buffer); } if (!preAllocated) { farray = new Float32Array(data); } buffer = gl.createBuffer(); gl.bindBuffer(gl.ARRAY_BUFFER, buffer); gl.bufferData( gl.ARRAY_BUFFER, preAllocated || farray, gl.STATIC_DRAW ); // gl.bindAttribLocation(shader.program(), 0, 'aVertexPosition'); vertAttribute = gl.getAttribLocation(shader.program(), attrib); gl.enableVertexAttribArray(vertAttribute); // Trigger cleanup farray = false; return true; } /* * Bind the buffer */ function bind() { if (!buffer) { return false; } // gl.bindAttribLocation(shader.program(), 0, 'aVertexPosition'); // gl.enableVertexAttribArray(vertAttribute); // gl.bindBuffer(gl.ARRAY_BUFFER, buffer); gl.vertexAttribPointer( vertAttribute, components, gl.FLOAT, false, 0, 0 ); // gl.enableVertexAttribArray(vertAttribute); } /* * Render the buffer * @param from {Integer} - the start indice * @param to {Integer} - the end indice * @param drawMode {String} - the draw mode */ function render(from, to, drawMode) { var length = preAllocated ? preAllocated.length : data.length; if (!buffer) { return false; } if (!length) { return false; } if (!from || from > length || from < 0) { from = 0; } if (!to || to > length) { to = length; } drawMode = drawMode || 'points'; gl.drawArrays( gl[drawMode.toUpperCase()], from / components, (to - from) / components ); return true; } function push(x, y, a, b) { if (preAllocated) { // && iterator <= preAllocated.length - 4) { preAllocated[++iterator] = x; preAllocated[++iterator] = y; preAllocated[++iterator] = a; preAllocated[++iterator] = b; } } /* * Note about pre-allocated buffers: * - This is slower for charts with many series */ function allocate(size) { size *= 4; iterator = -1; preAllocated = new Float32Array(size); } // ///////////////////////////////////////////////////////////////////////// return { destroy: destroy, bind: bind, data: data, build: build, render: render, allocate: allocate, push: push }; } /** * Main renderer. Used to render series. * * Notes to self: * - May be able to build a point map by rendering to a separate canvas and * encoding values in the color data. * - Need to figure out a way to transform the data quicker * * @private * @function GLRenderer * * @param {Function} postRenderCallback * * @return {*} */ function GLRenderer(postRenderCallback) { var // Shader shader = false, // Vertex buffers - keyed on shader attribute name vbuffer = false, // Opengl context gl = false, // Width of our viewport in pixels width = 0, // Height of our viewport in pixels height = 0, // The data to render - array of coordinates data = false, // The marker data markerData = false, // Exports exports = {}, // Is it inited? isInited = false, // The series stack series = [], // Texture handles textureHandles = {}, // Things to draw as "rectangles" (i.e lines) asBar = { 'column': true, 'columnrange': true, 'bar': true, 'area': true, 'arearange': true }, asCircle = { 'scatter': true, 'bubble': true }, // Render settings settings = { pointSize: 1, lineWidth: 1, fillColor: '#AA00AA', useAlpha: true, usePreallocated: false, useGPUTranslations: false, debug: { timeRendering: false, timeSeriesProcessing: false, timeSetup: false, timeBufferCopy: false, timeKDTree: false, showSkipSummary: false } }; // ///////////////////////////////////////////////////////////////////////// function setOptions(options) { merge(true, settings, options); } function seriesPointCount(series) { var isStacked, xData, s; if (series.isSeriesBoosting) { isStacked = !!series.options.stacking; xData = ( series.xData || series.options.xData || series.processedXData ); s = (isStacked ? series.data : (xData || series.options.data)) .length; if (series.type === 'treemap') { s *= 12; } else if (series.type === 'heatmap') { s *= 6; } else if (asBar[series.type]) { s *= 2; } return s; } return 0; } /* Allocate a float buffer to fit all series */ function allocateBuffer(chart) { var s = 0; if (!settings.usePreallocated) { return; } chart.series.forEach(function (series) { if (series.isSeriesBoosting) { s += seriesPointCount(series); } }); vbuffer.allocate(s); } function allocateBufferForSingleSeries(series) { var s = 0; if (!settings.usePreallocated) { return; } if (series.isSeriesBoosting) { s = seriesPointCount(series); } vbuffer.allocate(s); } /* * Returns an orthographic perspective matrix * @param {number} width - the width of the viewport in pixels * @param {number} height - the height of the viewport in pixels */ function orthoMatrix(width, height) { var near = 0, far = 1; return [ 2 / width, 0, 0, 0, 0, -(2 / height), 0, 0, 0, 0, -2 / (far - near), 0, -1, 1, -(far + near) / (far - near), 1 ]; } /* * Clear the depth and color buffer */ function clear() { gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT); } /* * Get the WebGL context * @returns {WebGLContext} - the context */ function getGL() { return gl; } /* * Push data for a single series * This calculates additional vertices and transforms the data to be * aligned correctly in memory */ function pushSeriesData(series, inst) { var isRange = series.pointArrayMap && series.pointArrayMap.join(',') === 'low,high', chart = series.chart, options = series.options, isStacked = !!options.stacking, rawData = options.data, xExtremes = series.xAxis.getExtremes(), xMin = xExtremes.min, xMax = xExtremes.max, yExtremes = series.yAxis.getExtremes(), yMin = yExtremes.min, yMax = yExtremes.max, xData = series.xData || options.xData || series.processedXData, yData = series.yData || options.yData || series.processedYData, zData = series.zData || options.zData || series.processedZData, yAxis = series.yAxis, xAxis = series.xAxis, plotHeight = series.chart.plotHeight, plotWidth = series.chart.plotWidth, useRaw = !xData || xData.length === 0, // threshold = options.threshold, // yBottom = chart.yAxis[0].getThreshold(threshold), // hasThreshold = isNumber(threshold), // colorByPoint = series.options.colorByPoint, // This is required for color by point, so make sure this is // uncommented if enabling that // colorIndex = 0, // Required for color axis support // caxis, connectNulls = options.connectNulls, // For some reason eslint doesn't pick up that this is actually used maxVal, // eslint-disable-line no-unused-vars points = series.points || false, lastX = false, lastY = false, minVal, color, scolor, sdata = isStacked ? series.data : (xData || rawData), closestLeft = { x: Number.MAX_VALUE, y: 0 }, closestRight = { x: -Number.MAX_VALUE, y: 0 }, skipped = 0, hadPoints = false, cullXThreshold = 1, cullYThreshold = 1, // The following are used in the builder while loop x, y, d, z, i = -1, px = false, nx = false, // This is in fact used. low, // eslint-disable-line no-unused-vars chartDestroyed = typeof chart.index === 'undefined', nextInside = false, prevInside = false, pcolor = false, drawAsBar = asBar[series.type], isXInside = false, isYInside = true, firstPoint = true, threshold = options.threshold; if (options.boostData && options.boostData.length > 0) { return; } if (chart.inverted) { plotHeight = series.chart.plotWidth; plotWidth = series.chart.plotHeight; } series.closestPointRangePx = Number.MAX_VALUE; // Push color to color buffer - need to do this per. vertex function pushColor(color) { if (color) { inst.colorData.push(color[0]); inst.colorData.push(color[1]); inst.colorData.push(color[2]); inst.colorData.push(color[3]); } } // Push a vertice to the data buffer function vertice(x, y, checkTreshold, pointSize, color) { pushColor(color); if (settings.usePreallocated) { vbuffer.push(x, y, checkTreshold ? 1 : 0, pointSize || 1); } else { data.push(x); data.push(y); data.push(checkTreshold ? 1 : 0); data.push(pointSize || 1); } } function closeSegment() { if (inst.segments.length) { inst.segments[inst.segments.length - 1].to = data.length; } } // Create a new segment for the current set function beginSegment() { // Insert a segment on the series. // A segment is just a start indice. // When adding a segment, if one exists from before, it should // set the previous segment's end if (inst.segments.length && inst.segments[inst.segments.length - 1].from === data.length ) { return; } closeSegment(); inst.segments.push({ from: data.length }); } // Push a rectangle to the data buffer function pushRect(x, y, w, h, color) { pushColor(color); vertice(x + w, y); pushColor(color); vertice(x, y); pushColor(color); vertice(x, y + h); pushColor(color); vertice(x, y + h); pushColor(color); vertice(x + w, y + h); pushColor(color); vertice(x + w, y); } // Create the first segment beginSegment(); // Special case for point shapes if (points && points.length > 0) { // If we're doing points, we assume that the points are already // translated, so we skip the shader translation. inst.skipTranslation = true; // Force triangle draw mode inst.drawMode = 'triangles'; // We don't have a z component in the shader, so we need to sort. if (points[0].node && points[0].node.levelDynamic) { points.sort(function (a, b) { if (a.node) { if (a.node.levelDynamic > b.node.levelDynamic) { return 1; } if (a.node.levelDynamic < b.node.levelDynamic) { return -1; } } return 0; }); } points.forEach(function (point) { var plotY = point.plotY, shapeArgs, swidth, pointAttr; if ( typeof plotY !== 'undefined' && !isNaN(plotY) && point.y !== null ) { shapeArgs = point.shapeArgs; pointAttr = chart.styledMode ? point.series.colorAttribs(point) : pointAttr = point.series.pointAttribs(point); swidth = pointAttr['stroke-width'] || 0; // Handle point colors color = H.color(pointAttr.fill).rgba; color[0] /= 255.0; color[1] /= 255.0; color[2] /= 255.0; // So there are two ways of doing this. Either we can // create a rectangle of two triangles, or we can do a // point and use point size. Latter is faster, but // only supports squares. So we're doing triangles. // We could also use one color per. vertice to get // better color interpolation. // If there's stroking, we do an additional rect if (series.type === 'treemap') { swidth = swidth || 1; scolor = H.color(pointAttr.stroke).rgba; scolor[0] /= 255.0; scolor[1] /= 255.0; scolor[2] /= 255.0; pushRect( shapeArgs.x, shapeArgs.y, shapeArgs.width, shapeArgs.height, scolor ); swidth /= 2; } // } else { // swidth = 0; // } // Fixes issues with inverted heatmaps (see #6981) // The root cause is that the coordinate system is flipped. // In other words, instead of [0,0] being top-left, it's // bottom-right. This causes a vertical and horizontal flip // in the resulting image, making it rotated 180 degrees. if (series.type === 'heatmap' && chart.inverted) { shapeArgs.x = xAxis.len - shapeArgs.x; shapeArgs.y = yAxis.len - shapeArgs.y; shapeArgs.width = -shapeArgs.width; shapeArgs.height = -shapeArgs.height; } pushRect( shapeArgs.x + swidth, shapeArgs.y + swidth, shapeArgs.width - (swidth * 2), shapeArgs.height - (swidth * 2), color ); } }); closeSegment(); return; } // Extract color axis // (chart.axes || []).forEach(function (a) { // if (H.ColorAxis && a instanceof H.ColorAxis) { // caxis = a; // } // }); while (i < sdata.length - 1) { d = sdata[++i]; // px = x = y = z = nx = low = false; // chartDestroyed = typeof chart.index === 'undefined'; // nextInside = prevInside = pcolor = isXInside = isYInside = false; // drawAsBar = asBar[series.type]; if (chartDestroyed) { break; } // Uncomment this to enable color by point. // This currently left disabled as the charts look really ugly // when enabled and there's a lot of points. // Leaving in for the future (tm). // if (colorByPoint) { // colorIndex = ++colorIndex % // series.chart.options.colors.length; // pcolor = toRGBAFast(series.chart.options.colors[colorIndex]); // pcolor[0] /= 255.0; // pcolor[1] /= 255.0; // pcolor[2] /= 255.0; // } if (useRaw) { x = d[0]; y = d[1]; if (sdata[i + 1]) { nx = sdata[i + 1][0]; } if (sdata[i - 1]) { px = sdata[i - 1][0]; } if (d.length >= 3) { z = d[2]; if (d[2] > inst.zMax) { inst.zMax = d[2]; } if (d[2] < inst.zMin) { inst.zMin = d[2]; } } } else { x = d; y = yData[i]; if (sdata[i + 1]) { nx = sdata[i + 1]; } if (sdata[i - 1]) { px = sdata[i - 1]; } if (zData && zData.length) { z = zData[i]; if (zData[i] > inst.zMax) { inst.zMax = zData[i]; } if (zData[i] < inst.zMin) { inst.zMin = zData[i]; } } } if (!connectNulls && (x === null || y === null)) { beginSegment(); continue; } if (nx && nx >= xMin && nx <= xMax) { nextInside = true; } if (px && px >= xMin && px <= xMax) { prevInside = true; } if (isRange) { if (useRaw) { y = d.slice(1, 3); } low = y[0]; y = y[1]; } else if (isStacked) { x = d.x; y = d.stackY; low = y - d.y; } if (yMin !== null && typeof yMin !== 'undefined' && yMax !== null && typeof yMax !== 'undefined' ) { isYInside = y >= yMin && y <= yMax; } if (x > xMax && closestRight.x < xMax) { closestRight.x = x; closestRight.y = y; } if (x < xMin && closestLeft.x > xMin) { closestLeft.x = x; closestLeft.y = y; } if (y === null && connectNulls) { continue; } // Cull points outside the extremes if (y === null || (!isYInside && !nextInside && !prevInside)) { beginSegment(); continue; } if (x >= xMin && x <= xMax) { isXInside = true; } if (!isXInside && !nextInside && !prevInside) { continue; } // Skip translations - temporary floating point fix if (!settings.useGPUTranslations) { inst.skipTranslation = true; x = xAxis.toPixels(x, true); y = yAxis.toPixels(y, true); // Make sure we're not drawing outside of the chart area. // See #6594. if (y > plotHeight) { y = plotHeight; } if (x > plotWidth) { // If this is rendered as a point, just skip drawing it // entirely, as we're not dependandt on lineTo'ing to it. // See #8197 if (inst.drawMode === 'points') { continue; } // Having this here will clamp markers and make the angle // of the last line wrong. See 9166. // x = plotWidth; } } if (drawAsBar) { maxVal = y; minVal = low; if (low === false || typeof low === 'undefined') { if (y < 0) { minVal = y; } else { minVal = 0; } } if (!isRange && !isStacked) { minVal = Math.max(threshold, yMin); // #8731 } if (!settings.useGPUTranslations) { minVal = yAxis.toPixels(minVal, true); } // Need to add an extra point here vertice(x, minVal, 0, 0, pcolor); } // No markers on out of bounds things. // Out of bound things are shown if and only if the next // or previous point is inside the rect. if (inst.hasMarkers && isXInside) { // x = H.correctFloat( // Math.min(Math.max(-1e5, xAxis.translate( // x, // 0, // 0, // 0, // 1, // 0.5, // false // )), 1e5) // ); if (lastX !== false) { series.closestPointRangePx = Math.min( series.closestPointRangePx, Math.abs(x - lastX) ); } } // If the last _drawn_ point is closer to this point than the // threshold, skip it. Shaves off 20-100ms in processing. if (!settings.useGPUTranslations && !settings.usePreallocated && (lastX && Math.abs(x - lastX) < cullXThreshold) && (lastY && Math.abs(y - lastY) < cullYThreshold) ) { if (settings.debug.showSkipSummary) { ++skipped; } continue; } // Do step line if enabled. // Draws an additional point at the old Y at the new X. // See #6976. if (options.step && !firstPoint) { vertice( x, lastY, 0, 2, pcolor ); } vertice( x, y, 0, series.type === 'bubble' ? (z || 1) : 2, pcolor ); // Uncomment this to support color axis. // if (caxis) { // color = H.color(caxis.toColor(y)).rgba; // inst.colorData.push(color[0] / 255.0); // inst.colorData.push(color[1] / 255.0); // inst.colorData.push(color[2] / 255.0); // inst.colorData.push(color[3]); // } lastX = x; lastY = y; hadPoints = true; firstPoint = false; } if (settings.debug.showSkipSummary) { console.log('skipped points:', skipped); // eslint-disable-line no-console } function pushSupplementPoint(point, atStart) { if (!settings.useGPUTranslations) { inst.skipTranslation = true; point.x = xAxis.toPixels(point.x, true); point.y = yAxis.toPixels(point.y, true); } // We should only do this for lines, and we should ignore markers // since there's no point here that would have a marker. if (atStart) { data = [point.x, point.y, 0, 2].concat(data); return; } vertice( point.x, point.y, 0, 2 ); } if ( !hadPoints && connectNulls !== false && series.drawMode === 'line_strip' ) { if (closestLeft.x < Number.MAX_VALUE) { // We actually need to push this *before* the complete buffer. pushSupplementPoint(closestLeft, true); } if (closestRight.x > -Number.MAX_VALUE) { pushSupplementPoint(closestRight); } } closeSegment(); } /* * Push a series to the renderer * If we render the series immediatly, we don't have to loop later * @param s {Highchart.Series} - the series to push */ function pushSeries(s) { if (series.length > 0) { // series[series.length - 1].to = data.length; if (series[series.length - 1].hasMarkers) { series[series.length - 1].markerTo = markerData.length; } } if (settings.debug.timeSeriesProcessing) { console.time('building ' + s.type + ' series'); // eslint-disable-line no-console } series.push({ segments: [], // from: data.length, markerFrom: markerData.length, // Push RGBA values to this array to use per. point coloring. // It should be 0-padded, so each component should be pushed in // succession. colorData: [], series: s, zMin: Number.MAX_VALUE, zMax: -Number.MAX_VALUE, hasMarkers: s.options.marker ? s.options.marker.enabled !== false : false, showMarkers: true, drawMode: ({ 'area': 'lines', 'arearange': 'lines', 'areaspline': 'line_strip', 'column': 'lines', 'columnrange': 'lines', 'bar': 'lines', 'line': 'line_strip', 'scatter': 'points', 'heatmap': 'triangles', 'treemap': 'triangles', 'bubble': 'points' })[s.type] || 'line_strip' }); // Add the series data to our buffer(s) pushSeriesData(s, series[series.length - 1]); if (settings.debug.timeSeriesProcessing) { console.timeEnd('building ' + s.type + ' series'); // eslint-disable-line no-console } } /* * Flush the renderer. * This removes pushed series and vertices. * Should be called after clearing and before rendering */ function flush() { series = []; exports.data = data = []; markerData = []; if (vbuffer) { vbuffer.destroy(); } } /* * Pass x-axis to shader * @param axis {Highcharts.Axis} - the x-axis */ function setXAxis(axis) { if (!shader) { return; } shader.setUniform('xAxisTrans', axis.transA); shader.setUniform('xAxisMin', axis.min); shader.setUniform('xAxisMinPad', axis.minPixelPadding); shader.setUniform('xAxisPointRange', axis.pointRange); shader.setUniform('xAxisLen', axis.len); shader.setUniform('xAxisPos', axis.pos); shader.setUniform('xAxisCVSCoord', !axis.horiz); } /* * Pass y-axis to shader * @param axis {Highcharts.Axis} - the y-axis */ function setYAxis(axis) { if (!shader) { return; } shader.setUniform('yAxisTrans', axis.transA); shader.setUniform('yAxisMin', axis.min); shader.setUniform('yAxisMinPad', axis.minPixelPadding); shader.setUniform('yAxisPointRange', axis.pointRange); shader.setUniform('yAxisLen', axis.len); shader.setUniform('yAxisPos', axis.pos); shader.setUniform('yAxisCVSCoord', !axis.horiz); } /* * Set the translation threshold * @param has {boolean} - has threshold flag * @param translation {Float} - the threshold */ function setThreshold(has, translation) { shader.setUniform('hasThreshold', has); shader.setUniform('translatedThreshold', translation); } /* * Render the data * This renders all pushed series. */ function render(chart) { if (chart) { if (!chart.chartHeight || !chart.chartWidth) { // chart.setChartSize(); } width = chart.chartWidth || 800; height = chart.chartHeight || 400; } else { return false; } if (!gl || !width || !height || !shader) { return false; } if (settings.debug.timeRendering) { console.time('gl rendering'); // eslint-disable-line no-console } gl.canvas.width = width; gl.canvas.height = height; shader.bind(); gl.viewport(0, 0, width, height); shader.setPMatrix(orthoMatrix(width, height)); shader.setPlotHeight(chart.plotHeight); if (settings.lineWidth > 1 && !H.isMS) { gl.lineWidth(settings.lineWidth); } vbuffer.build(exports.data, 'aVertexPosition', 4); vbuffer.bind(); shader.setInverted(chart.inverted); // Render the series series.forEach(function (s, si) { var options = s.series.options, shapeOptions = options.marker, sindex, lineWidth = typeof options.lineWidth !== 'undefined' ? options.lineWidth : 1, threshold = options.threshold, hasThreshold = isNumber(threshold), yBottom = s.series.yAxis.getThreshold(threshold), translatedThreshold = yBottom, cbuffer, showMarkers = pick( options.marker ? options.marker.enabled : null, s.series.xAxis.isRadial ? true : null, s.series.closestPointRangePx > 2 * (( options.marker ? options.marker.radius : 10 ) || 10) ), fillColor, shapeTexture = textureHandles[ (shapeOptions && shapeOptions.symbol) || s.series.symbol ] || textureHandles.circle, color; if ( s.segments.length === 0 || (s.segmentslength && s.segments[0].from === s.segments[0].to) ) { return; } if (shapeTexture.isReady) { gl.bindTexture(gl.TEXTURE_2D, shapeTexture.handle); shader.setTexture(shapeTexture.handle); } if (chart.styledMode) { fillColor = ( s.series.markerGroup && s.series.markerGroup.getStyle('fill') ); } else { fillColor = (s.series.pointAttribs && s.series.pointAttribs().fill) || s.series.color; if (options.colorByPoint) { fillColor = s.series.chart.options.colors[si]; } } if (s.series.fillOpacity && options.fillOpacity) { fillColor = new Color(fillColor).setOpacity( pick(options.fillOpacity, 1.0) ).get(); } color = H.color(fillColor).rgba; if (!settings.useAlpha) { color[3] = 1.0; } // This is very much temporary if (s.drawMode === 'lines' && settings.useAlpha && color[3] < 1) { color[3] /= 10; } // Blending if (options.boostBlending === 'add') { gl.blendFunc(gl.SRC_ALPHA, gl.ONE); gl.blendEquation(gl.FUNC_ADD); } else if (options.boostBlending === 'mult' || options.boostBlending === 'multiply' ) { gl.blendFunc(gl.DST_COLOR, gl.ZERO); } else if (options.boostBlending === 'darken') { gl.blendFunc(gl.ONE, gl.ONE); gl.blendEquation(gl.FUNC_MIN); } else { // gl.blendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA); // gl.blendEquation(gl.FUNC_ADD); gl.blendFuncSeparate( gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA, gl.ONE, gl.ONE_MINUS_SRC_ALPHA ); } shader.reset(); // If there are entries in the colorData buffer, build and bind it. if (s.colorData.length > 0) { shader.setUniform('hasColor', 1.0); cbuffer = GLVertexBuffer(gl, shader); // eslint-disable-line new-cap cbuffer.build(s.colorData, 'aColor', 4); cbuffer.bind(); } // Set series specific uniforms shader.setColor(color); setXAxis(s.series.xAxis); setYAxis(s.series.yAxis); setThreshold(hasThreshold, translatedThreshold); if (s.drawMode === 'points') { if (options.marker && options.marker.radius) { shader.setPointSize(options.marker.radius * 2.0); } else { shader.setPointSize(1); } } // If set to true, the toPixels translations in the shader // is skipped, i.e it's assumed that the value is a pixel coord. shader.setSkipTranslation(s.skipTranslation); if (s.series.type === 'bubble') { shader.setBubbleUniforms(s.series, s.zMin, s.zMax); } shader.setDrawAsCircle( asCircle[s.series.type] || false ); // Do the actual rendering // If the line width is < 0, skip rendering of the lines. See #7833. if (lineWidth > 0 || s.drawMode !== 'line_strip') { for (sindex = 0; sindex < s.segments.length; sindex++) { // if (s.segments[sindex].from < s.segments[sindex].to) { vbuffer.render( s.segments[sindex].from, s.segments[sindex].to, s.drawMode ); // } } } if (s.hasMarkers && showMarkers) { if (options.marker && options.marker.radius) { shader.setPointSize(options.marker.radius * 2.0); } else { shader.setPointSize(10); } shader.setDrawAsCircle(true); for (sindex = 0; sindex < s.segments.length; sindex++) { // if (s.segments[sindex].from < s.segments[sindex].to) { vbuffer.render( s.segments[sindex].from, s.segments[sindex].to, 'POINTS' ); // } } } }); if (settings.debug.timeRendering) { console.timeEnd('gl rendering'); // eslint-disable-line no-console } if (postRenderCallback) { postRenderCallback(); } flush(); } /* * Render the data when ready */ function renderWhenReady(chart) { clear(); if (chart.renderer.forExport) { return render(chart); } if (isInited) { render(chart); } else { setTimeout(function () { renderWhenReady(chart); }, 1); } } /* * Set the viewport size in pixels * Creates an orthographic perspective matrix and applies it. * @param w {Integer} - the width of the viewport * @param h {Integer} - the height of the viewport */ function setSize(w, h) { // Skip if there's no change, or if we have no valid shader if ((width === w && height === h) || !shader) { return; } width = w; height = h; shader.bind(); shader.setPMatrix(orthoMatrix(width, height)); } /* * Init OpenGL * @param canvas {HTMLCanvas} - the canvas to render to */ function init(canvas, noFlush) { var i = 0, contexts = [ 'webgl', 'experimental-webgl', 'moz-webgl', 'webkit-3d' ]; isInited = false; if (!canvas) { return false; } if (settings.debug.timeSetup) { console.time('gl setup'); // eslint-disable-line no-console } for (; i < contexts.length; i++) { gl = canvas.getContext(contexts[i], { // premultipliedAlpha: false }); if (gl) { break; } } if (gl) { if (!noFlush) { flush(); } } else { return false; } gl.enable(gl.BLEND); // gl.blendFunc(gl.SRC_ALPHA, gl.ONE); gl.blendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA); gl.disable(gl.DEPTH_TEST); // gl.depthMask(gl.FALSE); gl.depthFunc(gl.LESS); shader = GLShader(gl); // eslint-disable-line new-cap if (!shader) { // We need to abort, there's no shader context return false; } vbuffer = GLVertexBuffer(gl, shader); // eslint-disable-line new-cap function createTexture(name, fn) { var props = { isReady: false, texture: doc.createElement('canvas'), handle: gl.createTexture() }, ctx = props.texture.getContext('2d'); textureHandles[name] = props; props.texture.width = 512; props.texture.height = 512; ctx.mozImageSmoothingEnabled = false; ctx.webkitImageSmoothingEnabled = false; ctx.msImageSmoothingEnabled = false; ctx.imageSmoothingEnabled = false; ctx.strokeStyle = 'rgba(255, 255, 255, 0)'; ctx.fillStyle = '#FFF'; fn(ctx); try { gl.activeTexture(gl.TEXTURE0); gl.bindTexture(gl.TEXTURE_2D, props.handle); // gl.pixelStorei(gl.UNPACK_PREMULTIPLY_ALPHA_WEBGL, true); gl.texImage2D( gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, props.texture ); gl.texParameteri( gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE ); gl.texParameteri( gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE ); gl.texParameteri( gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR ); gl.texParameteri( gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR ); // gl.generateMipmap(gl.TEXTURE_2D); gl.bindTexture(gl.TEXTURE_2D, null); props.isReady = true; } catch (e) {} } // Circle shape createTexture('circle', function (ctx) { ctx.beginPath(); ctx.arc(256, 256, 256, 0, 2 * Math.PI); ctx.stroke(); ctx.fill(); }); // Square shape createTexture('square', function (ctx) { ctx.fillRect(0, 0, 512, 512); }); // Diamond shape createTexture('diamond', function (ctx) { ctx.beginPath(); ctx.moveTo(256, 0); ctx.lineTo(512, 256); ctx.lineTo(256, 512); ctx.lineTo(0, 256); ctx.lineTo(256, 0); ctx.fill(); }); // Triangle shape createTexture('triangle', function (ctx) { ctx.beginPath(); ctx.moveTo(0, 512); ctx.lineTo(256, 0); ctx.lineTo(512, 512); ctx.lineTo(0, 512); ctx.fill(); }); // Triangle shape (rotated) createTexture('triangle-down', function (ctx) { ctx.beginPath(); ctx.moveTo(0, 0); ctx.lineTo(256, 512); ctx.lineTo(512, 0); ctx.lineTo(0, 0); ctx.fill(); }); isInited = true; if (settings.debug.timeSetup) { console.timeEnd('gl setup'); // eslint-disable-line no-console } return true; } /* * Check if we have a valid OGL context * @returns {Boolean} - true if the context is valid */ function valid() { return gl !== false; } /* * Check if the renderer has been initialized * @returns {Boolean} - true if it has, false if not */ function inited() { return isInited; } function destroy() { flush(); vbuffer.destroy(); shader.destroy(); if (gl) { objEach(textureHandles, function (key) { if (textureHandles[key].handle) { gl.deleteTexture(textureHandles[key].handle); } }); gl.canvas.width = 1; gl.canvas.height = 1; } } // ///////////////////////////////////////////////////////////////////////// exports = { allocateBufferForSingleSeries: allocateBufferForSingleSeries, pushSeries: pushSeries, setSize: setSize, inited: inited, setThreshold: setThreshold, init: init, render: renderWhenReady, settings: settings, valid: valid, clear: clear, flush: flush, setXAxis: setXAxis, setYAxis: setYAxis, data: data, gl: getGL, allocateBuffer: allocateBuffer, destroy: destroy, setOptions: setOptions }; return exports; } // END OF WEBGL ABSTRACTIONS // ///////////////////////////////////////////////////////////////////////////// /** * Create a canvas + context and attach it to the target * * @private * @function createAndAttachRenderer * * @param {Highcharts.Chart|Highcharts.Series} target * the canvas target * * @param {Highcharts.Chart} chart * the chart * * @return {*} */ function createAndAttachRenderer(chart, series) { var width = chart.chartWidth, height = chart.chartHeight, target = chart, targetGroup = chart.seriesGroup || series.group, alpha = 1, foSupported = doc.implementation.hasFeature( 'www.http://w3.org/TR/SVG11/feature#Extensibility', '1.1' ); if (chart.isChartSeriesBoosting()) { target = chart; } else { target = series; } // Support for foreignObject is flimsy as best. // IE does not support it, and Chrome has a bug which messes up // the canvas draw order. // As such, we force the Image fallback for now, but leaving the // actual Canvas path in-place in case this changes in the future. foSupported = false; if (!target.renderTarget) { target.canvas = mainCanvas; // Fall back to image tag if foreignObject isn't supported, // or if we're exporting. if (chart.renderer.forExport || !foSupported) { target.renderTarget = chart.renderer.image( '', 0, 0, width, height ) .addClass('highcharts-boost-canvas') .add(targetGroup); target.boostClear = function () { target.renderTarget.attr({ href: '' }); }; target.boostCopy = function () { target.boostResizeTarget(); target.renderTarget.attr({ href: target.canvas.toDataURL('image/png') }); }; } else { target.renderTargetFo = chart.renderer .createElement('foreignObject') .add(targetGroup); target.renderTarget = doc.createElement('canvas'); target.renderTargetCtx = target.renderTarget.getContext('2d'); target.renderTargetFo.element.appendChild(target.renderTarget); target.boostClear = function () { target.renderTarget.width = target.canvas.width; target.renderTarget.height = target.canvas.height; }; target.boostCopy = function () { target.renderTarget.width = target.canvas.width; target.renderTarget.height = target.canvas.height; target.renderTargetCtx.drawImage(target.canvas, 0, 0); }; } target.boostResizeTarget = function () { width = chart.chartWidth; height = chart.chartHeight; (target.renderTargetFo || target.renderTarget) .attr({ x: 0, y: 0, width: width, height: height }) .css({ pointerEvents: 'none', mixedBlendMode: 'normal', opacity: alpha }); if (target instanceof H.Chart) { target.markerGroup.translate( chart.plotLeft, chart.plotTop ); } }; target.boostClipRect = chart.renderer.clipRect(); (target.renderTargetFo || target.renderTarget) .clip(target.boostClipRect); if (target instanceof H.Chart) { target.markerGroup = target.renderer.g().add(targetGroup); target.markerGroup.translate(series.xAxis.pos, series.yAxis.pos); } } target.canvas.width = width; target.canvas.height = height; target.boostClipRect.attr(chart.getBoostClipRect(target)); target.boostResizeTarget(); target.boostClear(); if (!target.ogl) { target.ogl = GLRenderer(function () { // eslint-disable-line new-cap if (target.ogl.settings.debug.timeBufferCopy) { console.time('buffer copy'); // eslint-disable-line no-console } target.boostCopy(); if (target.ogl.settings.debug.timeBufferCopy) { console.timeEnd('buffer copy'); // eslint-disable-line no-console } }); // eslint-disable-line new-cap if (!target.ogl.init(target.canvas)) { // The OGL renderer couldn't be inited. // This likely means a shader error as we wouldn't get to this point // if there was no WebGL support. H.error('[highcharts boost] - unable to init WebGL renderer'); } // target.ogl.clear(); target.ogl.setOptions(chart.options.boost || {}); if (target instanceof H.Chart) { target.ogl.allocateBuffer(chart); } } target.ogl.setSize(width, height); return target.ogl; } /* * Performs the actual render if the renderer is * attached to the series. * @param renderer {OGLRenderer} - the renderer * @param series {Highcharts.Series} - the series */ function renderIfNotSeriesBoosting(renderer, series, chart) { if (renderer && series.renderTarget && series.canvas && !(chart || series.chart).isChartSeriesBoosting() ) { renderer.render(chart || series.chart); } } function allocateIfNotSeriesBoosting(renderer, series) { if (renderer && series.renderTarget && series.canvas && !series.chart.isChartSeriesBoosting() ) { renderer.allocateBufferForSingleSeries(series); } } /* * An "async" foreach loop. Uses a setTimeout to keep the loop from blocking the * UI thread. * * @param arr {Array} - the array to loop through * @param fn {Function} - the callback to call for each item * @param finalFunc {Function} - the callback to call when done * @param chunkSize {Number} - the number of iterations per timeout * @param i {Number} - the current index * @param noTimeout {Boolean} - set to true to skip timeouts */ H.eachAsync = function (arr, fn, finalFunc, chunkSize, i, noTimeout) { i = i || 0; chunkSize = chunkSize || CHUNK_SIZE; var threshold = i + chunkSize, proceed = true; while (proceed && i < threshold && i < arr.length) { proceed = fn(arr[i], i); ++i; } if (proceed) { if (i < arr.length) { if (noTimeout) { H.eachAsync(arr, fn, finalFunc, chunkSize, i, noTimeout); } else if (win.requestAnimationFrame) { // If available, do requestAnimationFrame - shaves off a few ms win.requestAnimationFrame(function () { H.eachAsync(arr, fn, finalFunc, chunkSize, i); }); } else { setTimeout(function () { H.eachAsync(arr, fn, finalFunc, chunkSize, i); }); } } else if (finalFunc) { finalFunc(); } } }; // ///////////////////////////////////////////////////////////////////////////// // Following is the parts of the boost that's common between OGL/Legacy /** * Return a full Point object based on the index. * The boost module uses stripped point objects for performance reasons. * * @function Highcharts.Series#getPoint * * @param {object|Highcharts.Point} boostPoint * A stripped-down point object * * @return {object} * A Point object as per http://api.highcharts.com/highcharts#Point */ Series.prototype.getPoint = function (boostPoint) { var point = boostPoint, xData = ( this.xData || this.options.xData || this.processedXData || false ); if (boostPoint && !(boostPoint instanceof this.pointClass)) { point = (new this.pointClass()).init( // eslint-disable-line new-cap this, this.options.data[boostPoint.i], xData ? xData[boostPoint.i] : undefined ); point.category = point.x; point.dist = boostPoint.dist; point.distX = boostPoint.distX; point.plotX = boostPoint.plotX; point.plotY = boostPoint.plotY; point.index = boostPoint.i; } return point; }; /** * Return a point instance from the k-d-tree */ wrap(Series.prototype, 'searchPoint', function (proceed) { return this.getPoint( proceed.apply(this, [].slice.call(arguments, 1)) ); }); /** * Extend series.destroy to also remove the fake k-d-tree points (#5137). * Normally this is handled by Series.destroy that calls Point.destroy, * but the fake search points are not registered like that. */ addEvent(Series, 'destroy', function () { var series = this, chart = series.chart; if (chart.markerGroup === series.markerGroup) { series.markerGroup = null; } if (chart.hoverPoints) { chart.hoverPoints = chart.hoverPoints.filter(function (point) { return point.series === series; }); } if (chart.hoverPoint && chart.hoverPoint.series === series) { chart.hoverPoint = null; } }); /** * Do not compute extremes when min and max are set. * If we use this in the core, we can add the hook * to hasExtremes to the methods directly. */ wrap(Series.prototype, 'getExtremes', function (proceed) { if (!this.isSeriesBoosting || (!this.hasExtremes || !this.hasExtremes())) { return proceed.apply(this, Array.prototype.slice.call(arguments, 1)); } }); // Set default options boostable.forEach( function (type) { if (plotOptions[type]) { plotOptions[type].boostThreshold = 5000; plotOptions[type].boostData = []; seriesTypes[type].prototype.fillOpacity = true; } } ); /** * Override a bunch of methods the same way. If the number of points is * below the threshold, run the original method. If not, check for a * canvas version or do nothing. * * Note that we're not overriding any of these for heatmaps. */ [ 'translate', 'generatePoints', 'drawTracker', 'drawPoints', 'render' ].forEach(function (method) { function branch(proceed) { var letItPass = this.options.stacking && (method === 'translate' || method === 'generatePoints'); if ( !this.isSeriesBoosting || letItPass || !boostEnabled(this.chart) || this.type === 'heatmap' || this.type === 'treemap' || !boostableMap[this.type] || this.options.boostThreshold === 0 ) { proceed.call(this); // If a canvas version of the method exists, like renderCanvas(), run } else if (this[method + 'Canvas']) { this[method + 'Canvas'](); } } wrap(Series.prototype, method, branch); // A special case for some types - their translate method is already wrapped if (method === 'translate') { [ 'column', 'bar', 'arearange', 'columnrange', 'heatmap', 'treemap' ].forEach( function (type) { if (seriesTypes[type]) { wrap(seriesTypes[type].prototype, method, branch); } } ); } }); /** If the series is a heatmap or treemap, or if the series is not boosting * do the default behaviour. Otherwise, process if the series has no * extremes. */ wrap(Series.prototype, 'processData', function (proceed) { var series = this, dataToMeasure = this.options.data; // Used twice in this function, first on this.options.data, the second // time it runs the check again after processedXData is built. // @todo Check what happens with data grouping function getSeriesBoosting(data) { return series.chart.isChartSeriesBoosting() || ( (data ? data.length : 0) >= (series.options.boostThreshold || Number.MAX_VALUE) ); } if (boostEnabled(this.chart) && boostableMap[this.type]) { // If there are no extremes given in the options, we also need to // process the data to read the data extremes. If this is a heatmap, do // default behaviour. if ( !getSeriesBoosting(dataToMeasure) || // First pass with options.data this.type === 'heatmap' || this.type === 'treemap' || this.options.stacking || // processedYData for the stack (#7481) !this.hasExtremes || !this.hasExtremes(true) ) { proceed.apply(this, Array.prototype.slice.call(arguments, 1)); dataToMeasure = this.processedXData; } // Set the isBoosting flag, second pass with processedXData to see if we // have zoomed. this.isSeriesBoosting = getSeriesBoosting(dataToMeasure); // Enter or exit boost mode if (this.isSeriesBoosting) { this.enterBoost(); } else if (this.exitBoost) { this.exitBoost(); } // The series type is not boostable } else { proceed.apply(this, Array.prototype.slice.call(arguments, 1)); } }); addEvent(Series, 'hide', function () { if (this.canvas && this.renderTarget) { if (this.ogl) { this.ogl.clear(); } this.boostClear(); } }); /** * Enter boost mode and apply boost-specific properties. * * @function Highcharts.Series#enterBoost */ Series.prototype.enterBoost = function () { this.alteredByBoost = []; // Save the original values, including whether it was an own property or // inherited from the prototype. ['allowDG', 'directTouch', 'stickyTracking'].forEach(function (prop) { this.alteredByBoost.push({ prop: prop, val: this[prop], own: this.hasOwnProperty(prop) }); }, this); this.allowDG = false; this.directTouch = false; this.stickyTracking = true; // Once we've been in boost mode, we don't want animation when returning to // vanilla mode. this.animate = null; // Hide series label if any if (this.labelBySeries) { this.labelBySeries = this.labelBySeries.destroy(); } }; /** * Exit from boost mode and restore non-boost properties. * * @function Highcharts.Series#exitBoost */ Series.prototype.exitBoost = function () { // Reset instance properties and/or delete instance properties and go back // to prototype (this.alteredByBoost || []).forEach(function (setting) { if (setting.own) { this[setting.prop] = setting.val; } else { // Revert to prototype delete this[setting.prop]; } }, this); // Clear previous run if (this.boostClear) { this.boostClear(); } }; /** * @private * @function Highcharts.Series#hasExtremes * * @param {boolean} checkX * * @return {boolean} */ Series.prototype.hasExtremes = function (checkX) { var options = this.options, data = options.data, xAxis = this.xAxis && this.xAxis.options, yAxis = this.yAxis && this.yAxis.options; return data.length > (options.boostThreshold || Number.MAX_VALUE) && isNumber(yAxis.min) && isNumber(yAxis.max) && (!checkX || (isNumber(xAxis.min) && isNumber(xAxis.max))); }; /** * If implemented in the core, parts of this can probably be * shared with other similar methods in Highcharts. * * @function Highcharts.Series#destroyGraphics */ Series.prototype.destroyGraphics = function () { var series = this, points = this.points, point, i; if (points) { for (i = 0; i < points.length; i = i + 1) { point = points[i]; if (point && point.destroyElements) { point.destroyElements(); // #7557 } } } ['graph', 'area', 'tracker'].forEach(function (prop) { if (series[prop]) { series[prop] = series[prop].destroy(); } }); }; /** * Returns true if the current browser supports webgl * * @private * @function Highcharts.hasWebGLSupport * * @return {boolean} */ H.hasWebGLSupport = function () { var i = 0, canvas, contexts = ['webgl', 'experimental-webgl', 'moz-webgl', 'webkit-3d'], context = false; if (typeof win.WebGLRenderingContext !== 'undefined') { canvas = doc.createElement('canvas'); for (; i < contexts.length; i++) { try { context = canvas.getContext(contexts[i]); if (typeof context !== 'undefined' && context !== null) { return true; } } catch (e) { } } } return false; }; /** * Used for treemap|heatmap.drawPoints * * @private * @function pointDrawHandler * * @param {Function} proceed * * @return {*} */ function pointDrawHandler(proceed) { var enabled = true, renderer; if (this.chart.options && this.chart.options.boost) { enabled = typeof this.chart.options.boost.enabled === 'undefined' ? true : this.chart.options.boost.enabled; } if (!enabled || !this.isSeriesBoosting) { return proceed.call(this); } this.chart.isBoosting = true; // Make sure we have a valid OGL context renderer = createAndAttachRenderer(this.chart, this); if (renderer) { allocateIfNotSeriesBoosting(renderer, this); renderer.pushSeries(this); } renderIfNotSeriesBoosting(renderer, this); } // ///////////////////////////////////////////////////////////////////////////// // We're wrapped in a closure, so just return if there's no webgl support if (!H.hasWebGLSupport()) { if (typeof H.initCanvasBoost !== 'undefined') { // Fallback to canvas boost H.initCanvasBoost(); } else { H.error(26); } } else { // ///////////////////////////////////////////////////////////////////////// // GL-SPECIFIC WRAPPINGS FOLLOWS H.extend(Series.prototype, { /** * @private * @function Highcharts.Series#renderCanvas */ renderCanvas: function () { var series = this, options = series.options || {}, renderer = false, chart = series.chart, xAxis = this.xAxis, yAxis = this.yAxis, xData = options.xData || series.processedXData, yData = options.yData || series.processedYData, rawData = options.data, xExtremes = xAxis.getExtremes(), xMin = xExtremes.min, xMax = xExtremes.max, yExtremes = yAxis.getExtremes(), yMin = yExtremes.min, yMax = yExtremes.max, pointTaken = {}, lastClientX, sampling = !!series.sampling, points, enableMouseTracking = options.enableMouseTracking !== false, threshold = options.threshold, yBottom = yAxis.getThreshold(threshold), isRange = series.pointArrayMap && series.pointArrayMap.join(',') === 'low,high', isStacked = !!options.stacking, cropStart = series.cropStart || 0, requireSorting = series.requireSorting, useRaw = !xData, minVal, maxVal, minI, maxI, boostOptions, compareX = options.findNearestPointBy === 'x', xDataFull = ( this.xData || this.options.xData || this.processedXData || false ), addKDPoint = function (clientX, plotY, i) { // We need to do ceil on the clientX to make things // snap to pixel values. The renderer will frequently // draw stuff on "sub-pixels". clientX = Math.ceil(clientX); // Shaves off about 60ms compared to repeated concatenation index = compareX ? clientX : clientX + ',' + plotY; // The k-d tree requires series points. // Reduce the amount of points, since the time to build the // tree increases exponentially. if (enableMouseTracking && !pointTaken[index]) { pointTaken[index] = true; if (chart.inverted) { clientX = xAxis.len - clientX; plotY = yAxis.len - plotY; } points.push({ x: xDataFull ? xDataFull[cropStart + i] : false, clientX: clientX, plotX: clientX, plotY: plotY, i: cropStart + i }); } }; // Get or create the renderer renderer = createAndAttachRenderer(chart, series); chart.isBoosting = true; boostOptions = renderer.settings; if (!this.visible) { return; } // If we are zooming out from SVG mode, destroy the graphics if (this.points || this.graph) { this.animate = null; this.destroyGraphics(); } // If we're rendering per. series we should create the marker groups // as usual. if (!chart.isChartSeriesBoosting()) { this.markerGroup = series.plotGroup( 'markerGroup', 'markers', true, 1, chart.seriesGroup ); } else { // Use a single group for the markers this.markerGroup = chart.markerGroup; // When switching from chart boosting mode, destroy redundant // series boosting targets if (this.renderTarget) { this.renderTarget = this.renderTarget.destroy(); } } points = this.points = []; // Do not start building while drawing series.buildKDTree = noop; if (renderer) { allocateIfNotSeriesBoosting(renderer, this); renderer.pushSeries(series); // Perform the actual renderer if we're on series level renderIfNotSeriesBoosting(renderer, this, chart); } /* This builds the KD-tree */ function processPoint(d, i) { var x, y, clientX, plotY, isNull, low = false, chartDestroyed = typeof chart.index === 'undefined', isYInside = true; if (!chartDestroyed) { if (useRaw) { x = d[0]; y = d[1]; } else { x = d; y = yData[i]; } // Resolve low and high for range series if (isRange) { if (useRaw) { y = d.slice(1, 3); } low = y[0]; y = y[1]; } else if (isStacked) { x = d.x; y = d.stackY; low = y - d.y; } isNull = y === null; // Optimize for scatter zooming if (!requireSorting) { isYInside = y >= yMin && y <= yMax; } if (!isNull && x >= xMin && x <= xMax && isYInside) { clientX = xAxis.toPixels(x, true); if (sampling) { if (minI === undefined || clientX === lastClientX) { if (!isRange) { low = y; } if (maxI === undefined || y > maxVal) { maxVal = y; maxI = i; } if (minI === undefined || low < minVal) { minVal = low; minI = i; } } // Add points and reset if (clientX !== lastClientX) { if (minI !== undefined) { // maxI is number too plotY = yAxis.toPixels(maxVal, true); yBottom = yAxis.toPixels(minVal, true); addKDPoint(clientX, plotY, maxI); if (yBottom !== plotY) { addKDPoint(clientX, yBottom, minI); } } minI = maxI = undefined; lastClientX = clientX; } } else { plotY = Math.ceil(yAxis.toPixels(y, true)); addKDPoint(clientX, plotY, i); } } } return !chartDestroyed; } function doneProcessing() { fireEvent(series, 'renderedCanvas'); // Go back to prototype, ready to build delete series.buildKDTree; series.buildKDTree(); if (boostOptions.debug.timeKDTree) { console.timeEnd('kd tree building'); // eslint-disable-line no-console } } // Loop over the points to build the k-d tree - skip this if // exporting if (!chart.renderer.forExport) { if (boostOptions.debug.timeKDTree) { console.time('kd tree building'); // eslint-disable-line no-console } H.eachAsync( isStacked ? series.data : (xData || rawData), processPoint, doneProcessing ); } } }); /* * * We need to handle heatmaps separatly, since we can't perform the * size/color calculations in the shader easily. * * This likely needs future optimization. */ ['heatmap', 'treemap'].forEach( function (t) { if (seriesTypes[t]) { wrap(seriesTypes[t].prototype, 'drawPoints', pointDrawHandler); } } ); if (seriesTypes.bubble) { // By default, the bubble series does not use the KD-tree, so force it // to. delete seriesTypes.bubble.prototype.buildKDTree; // seriesTypes.bubble.prototype.directTouch = false; // Needed for markers to work correctly wrap( seriesTypes.bubble.prototype, 'markerAttribs', function (proceed) { if (this.isSeriesBoosting) { return false; } return proceed.apply(this, [].slice.call(arguments, 1)); } ); } seriesTypes.scatter.prototype.fill = true; extend(seriesTypes.area.prototype, { fill: true, fillOpacity: true, sampling: true }); extend(seriesTypes.column.prototype, { fill: true, sampling: true }); // Take care of the canvas blitting H.Chart.prototype.callbacks.push(function (chart) { /* Convert chart-level canvas to image */ function canvasToSVG() { if (chart.ogl && chart.isChartSeriesBoosting()) { chart.ogl.render(chart); } } /* Clear chart-level canvas */ function preRender() { // Reset force state chart.boostForceChartBoost = undefined; chart.boostForceChartBoost = shouldForceChartSeriesBoosting(chart); chart.isBoosting = false; if (!chart.isChartSeriesBoosting() && chart.didBoost) { chart.didBoost = false; } // Clear the canvas if (chart.boostClear) { chart.boostClear(); } if (chart.canvas && chart.ogl && chart.isChartSeriesBoosting()) { chart.didBoost = true; // Allocate chart.ogl.allocateBuffer(chart); } // see #6518 + #6739 if ( chart.markerGroup && chart.xAxis && chart.xAxis.length > 0 && chart.yAxis && chart.yAxis.length > 0 ) { chart.markerGroup.translate( chart.xAxis[0].pos, chart.yAxis[0].pos ); } } addEvent(chart, 'predraw', preRender); addEvent(chart, 'render', canvasToSVG); // addEvent(chart, 'zoom', function () { // chart.boostForceChartBoost = // shouldForceChartSeriesBoosting(chart); // }); }); } // if hasCanvasSupport