wwbsr/node_modules/highcharts/es-modules/Extensions/Boost/BoostAttach.js

/* *
 *
 *  Copyright (c) 2019-2020 Highsoft AS
 *
 *  Boost module: stripped-down renderer for higher performance
 *
 *  License: highcharts.com/license
 *
 *  !!!!!!! SOURCE GETS TRANSPILED BY TYPESCRIPT. EDIT TS FILE ONLY. !!!!!!!
 *
 * */
'use strict';
import GLRenderer from './WGLRenderer.js';
import H from '../../Core/Globals.js';
var doc = H.doc;
import U from '../../Core/Utilities.js';
var error = U.error;
import '../../Core/Series/Series.js';
var mainCanvas = doc.createElement('canvas');
/**
 * Create a canvas + context and attach it to the target
 *
 * @private
 * @function createAndAttachRenderer
 *
 * @param {Highcharts.Chart} chart
 * the chart
 *
 * @param {Highcharts.Series} series
 * the series
 *
 * @return {Highcharts.BoostGLRenderer}
 * the canvas renderer
 */
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 () {
            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
            }
        });
        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.
            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;
}
export default createAndAttachRenderer;