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/**
* 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
* @type {Object}
* @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}
* @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.
*
* @type {Object}
* @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
*/
/**
* 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.
*
* 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
*/
/* 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,
each = H.each,
extend = H.extend,
addEvent = H.addEvent,
fireEvent = H.fireEvent,
grep = H.grep,
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 = {};
each(boostable, 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() funciton
* @return {number} max value
*/
function patientMax() {
var args = Array.prototype.slice.call(arguments),
r = -Number.MAX_VALUE;
each(args, 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.
*
*/
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];
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;
}
/*
* Returns true if the chart is in series boost mode
* @param chart {Highchart.Chart} - the chart to check
* @returns {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.
*/
Chart.prototype.getBoostClipRect = function (target) {
var clipBox = {
x: this.plotLeft,
y: this.plotTop,
width: this.plotWidth,
height: this.plotHeight
};
if (target === this) {
each(this.yAxis, 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
* @param gl {WebGLContext} - the context in which the shader is active
*/
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,
// Texture uniform
uSamplerUniform;
/* 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)) {
// console.error('shader error:', 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;
// console.error('error creating shader program');
return false;
}
function uloc(n) {
return gl.getUniformLocation(shaderProgram, n);
}
shaderProgram = gl.createProgram();
gl.attachShader(shaderProgram, v);
gl.attachShader(shaderProgram, f);
gl.linkProgram(shaderProgram);
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) {
if (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() {
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) {
var u = uLocations[name] = uLocations[name] ||
gl.getUniformLocation(shaderProgram, name);
gl.uniform1f(u, val);
}
/*
* Set the active texture
* @param texture - the texture
*/
function setTexture() {
gl.uniform1i(uSamplerUniform, 0);
}
/*
* Set if inversion state
* @flag is the state
*/
function setInverted(flag) {
gl.uniform1i(isInverted, flag);
}
/*
* Enable/disable circle drawing
*/
function setDrawAsCircle(flag) {
gl.uniform1i(isCircleUniform, flag ? 1 : 0);
}
function setPlotHeight(n) {
gl.uniform1f(plotHeightUniform, n);
}
/*
* Flush
*/
function reset() {
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 (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<float>} - an array with RGBA values
*/
function setColor(color) {
gl.uniform4f(
fillColorUniform,
color[0] / 255.0,
color[1] / 255.0,
color[2] / 255.0,
color[3]
);
}
/*
* Set skip translation
*/
function setSkipTranslation(flag) {
gl.uniform1i(skipTranslationUniform, flag === true ? 1 : 0);
}
/*
* Set the perspective matrix
* @param m {Matrix4x4} - the matrix
*/
function setPMatrix(m) {
gl.uniformMatrix4fv(pUniform, false, m);
}
/*
* Set the point size.
* @param p {float} - point size
*/
function setPointSize(p) {
gl.uniform1f(psUniform, p);
}
/*
* Get the shader program handle
* @returns {GLInt} - the handle for the program
*/
function getProgram() {
return shaderProgram;
}
if (gl) {
createShader();
}
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.
* @param gl {WebGLContext} - the context in which to create the buffer
* @param shader {GLShader} - the shader to use
*/
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<float>} - 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
*/
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,
// Is the texture ready?
textureIsReady = false,
// Exports
exports = {},
// Is it inited?
isInited = false,
// The series stack
series = [],
// Texture for circles
circleTexture = doc.createElement('canvas'),
// Context for circle texture
circleCtx = circleTexture.getContext('2d'),
// Handle for the circle texture
circleTextureHandle,
// 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;
}
each(chart.series, 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.MIN_VALUE, y: 0 },
skipped = 0,
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;
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;
} else if (a.node.levelDynamic < b.node.levelDynamic) {
return -1;
}
}
return 0;
});
}
each(points, function (point) {
var plotY = point.plotY,
shapeArgs,
swidth,
pointAttr;
if (
typeof plotY !== 'undefined' &&
!isNaN(plotY) &&
point.y !== null
) {
shapeArgs = point.shapeArgs;
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
// each(chart.axes || [], 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) {
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) {
x = plotWidth;
}
}
if (drawAsBar) {
maxVal = y;
minVal = low;
if (low === false || typeof low === 'undefined') {
if (y < 0) {
minVal = y;
} else {
minVal = 0;
}
}
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 && 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) {
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;
}
if (settings.debug.showSkipSummary) {
console.log('skipped points:', skipped); // eslint-disable-line no-console
}
function pushSupplementPoint(point) {
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.
vertice(
point.x,
point.y,
0,
2
);
}
if (!lastX &&
connectNulls !== false &&
closestLeft > -Number.MAX_VALUE &&
closestRight < Number.MAX_VALUE) {
// There are no points within the selected range
pushSupplementPoint(closestLeft);
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,
showMarksers: 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) {
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();
if (textureIsReady) {
gl.bindTexture(gl.TEXTURE_2D, circleTextureHandle);
shader.setTexture(circleTextureHandle);
}
shader.setInverted(chart.inverted);
// Render the series
each(series, function (s, si) {
var options = s.series.options,
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,
color;
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') {
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] && textureIsReady) || 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
if (width === w && h === h) {
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
vbuffer = GLVertexBuffer(gl, shader); // eslint-disable-line new-cap
textureIsReady = false;
// Set up the circle texture used for bubbles
circleTextureHandle = gl.createTexture();
// Draw the circle
circleTexture.width = 512;
circleTexture.height = 512;
circleCtx.mozImageSmoothingEnabled = false;
circleCtx.webkitImageSmoothingEnabled = false;
circleCtx.msImageSmoothingEnabled = false;
circleCtx.imageSmoothingEnabled = false;
circleCtx.strokeStyle = 'rgba(255, 255, 255, 0)';
circleCtx.fillStyle = '#FFF';
circleCtx.beginPath();
circleCtx.arc(256, 256, 256, 0, 2 * Math.PI);
circleCtx.stroke();
circleCtx.fill();
try {
gl.bindTexture(gl.TEXTURE_2D, circleTextureHandle);
// gl.pixelStorei(gl.UNPACK_PREMULTIPLY_ALPHA_WEBGL, true);
gl.texImage2D(
gl.TEXTURE_2D,
0,
gl.RGBA,
gl.RGBA,
gl.UNSIGNED_BYTE,
circleTexture
);
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);
textureIsReady = true;
} catch (e) {}
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) {
if (circleTextureHandle) {
gl.deleteTexture(circleTextureHandle);
}
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
* @param target {Highcharts.Chart|Highcharts.Series} - the canvas target
* @param chart {Highcharts.Chart} - the chart
*/
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
target.ogl.init(target.canvas);
// 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.
* @param {Number} boostPoint A stripped-down point object
* @returns {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 = grep(chart.hoverPoints, 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
each(boostable,
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.
*/
each([
'translate',
'generatePoints',
'drawTracker',
'drawPoints',
'render'
], function (method) {
function branch(proceed) {
var letItPass = this.options.stacking &&
(method === 'translate' || method === 'generatePoints'),
enabled = pick(
(
this.chart &&
this.chart.options &&
this.chart.options.boost &&
this.chart.options.boost.enabled
),
true
);
if (
!this.isSeriesBoosting ||
letItPass ||
!enabled ||
this.type === 'heatmap' ||
this.type === 'treemap' ||
!boostableMap[this.type]
) {
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') {
each(
['column', 'bar', 'arearange', 'columnrange', 'heatmap', 'treemap'],
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 (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.
*/
Series.prototype.enterBoost = function () {
this.alteredByBoost = [];
// Save the original values, including whether it was an own property or
// inherited from the prototype.
each(['allowDG', 'directTouch', 'stickyTracking'], 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.
*/
Series.prototype.exitBoost = function () {
// Reset instance properties and/or delete instance properties and go back
// to prototype
each(this.alteredByBoost || [], 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();
}
};
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.
*/
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
}
}
}
each(['graph', 'area', 'tracker'], function (prop) {
if (series[prop]) {
series[prop] = series[prop].destroy();
}
});
};
/*
* Returns true if the current browser supports webgl
*/
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 */
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, {
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,
xDataFull = (
this.xData ||
this.options.xData ||
this.processedXData ||
false
),
addKDPoint = function (clientX, plotY, i) {
// Shaves off about 60ms compared to repeated concatination
index = 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);
// console.log(series, 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) {
// We use ceil to allow the KD tree to work with sub
// pixels, which can be used in boost to space pixels
clientX = Math.ceil(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.
*
*/
each(['heatmap', 'treemap'],
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