1009 lines
26 KiB
JavaScript
1009 lines
26 KiB
JavaScript
var _config = require("./config");
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var devicePixelRatio = _config.devicePixelRatio;
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var util = require("./core/util");
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var log = require("./core/log");
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var BoundingRect = require("./core/BoundingRect");
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var timsort = require("./core/timsort");
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var Layer = require("./Layer");
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var requestAnimationFrame = require("./animation/requestAnimationFrame");
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var Image = require("./graphic/Image");
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var env = require("./core/env");
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var HOVER_LAYER_ZLEVEL = 1e5;
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var CANVAS_ZLEVEL = 314159;
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var EL_AFTER_INCREMENTAL_INC = 0.01;
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var INCREMENTAL_INC = 0.001;
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function parseInt10(val) {
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return parseInt(val, 10);
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}
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function isLayerValid(layer) {
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if (!layer) {
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return false;
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}
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if (layer.__builtin__) {
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return true;
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}
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if (typeof layer.resize !== 'function' || typeof layer.refresh !== 'function') {
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return false;
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}
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return true;
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}
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var tmpRect = new BoundingRect(0, 0, 0, 0);
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var viewRect = new BoundingRect(0, 0, 0, 0);
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function isDisplayableCulled(el, width, height) {
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tmpRect.copy(el.getBoundingRect());
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if (el.transform) {
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tmpRect.applyTransform(el.transform);
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}
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viewRect.width = width;
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viewRect.height = height;
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return !tmpRect.intersect(viewRect);
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}
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function isClipPathChanged(clipPaths, prevClipPaths) {
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if (clipPaths === prevClipPaths) {
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// Can both be null or undefined
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return false;
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}
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if (!clipPaths || !prevClipPaths || clipPaths.length !== prevClipPaths.length) {
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return true;
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}
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for (var i = 0; i < clipPaths.length; i++) {
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if (clipPaths[i] !== prevClipPaths[i]) {
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return true;
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}
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}
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}
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function doClip(clipPaths, ctx) {
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for (var i = 0; i < clipPaths.length; i++) {
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var clipPath = clipPaths[i];
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clipPath.setTransform(ctx);
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ctx.beginPath();
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clipPath.buildPath(ctx, clipPath.shape);
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ctx.clip(); // Transform back
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clipPath.restoreTransform(ctx);
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}
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}
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function createRoot(width, height) {
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var domRoot = document.createElement('div'); // domRoot.onselectstart = returnFalse; // 避免页面选中的尴尬
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domRoot.style.cssText = ['position:relative', 'overflow:hidden', 'width:' + width + 'px', 'height:' + height + 'px', 'padding:0', 'margin:0', 'border-width:0'].join(';') + ';';
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return domRoot;
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}
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/**
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* @alias module:zrender/Painter
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* @constructor
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* @param {HTMLElement} root 绘图容器
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* @param {module:zrender/Storage} storage
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* @param {Object} opts
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*/
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var Painter = function (root, storage, opts) {
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this.type = 'canvas'; // In node environment using node-canvas
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var singleCanvas = !root.nodeName // In node ?
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|| root.nodeName.toUpperCase() === 'CANVAS';
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this._opts = opts = util.extend({}, opts || {});
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/**
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* @type {number}
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*/
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this.dpr = opts.devicePixelRatio || devicePixelRatio;
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/**
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* @type {boolean}
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* @private
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*/
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this._singleCanvas = singleCanvas;
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/**
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* 绘图容器
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* @type {HTMLElement}
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*/
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this.root = root;
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var rootStyle = root.style;
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if (rootStyle) {
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rootStyle['-webkit-tap-highlight-color'] = 'transparent';
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rootStyle['-webkit-user-select'] = rootStyle['user-select'] = rootStyle['-webkit-touch-callout'] = 'none';
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root.innerHTML = '';
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}
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/**
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* @type {module:zrender/Storage}
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*/
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this.storage = storage;
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/**
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* @type {Array.<number>}
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* @private
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*/
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var zlevelList = this._zlevelList = [];
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/**
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* @type {Object.<string, module:zrender/Layer>}
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* @private
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*/
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var layers = this._layers = {};
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/**
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* @type {Object.<string, Object>}
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* @private
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*/
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this._layerConfig = {};
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/**
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* zrender will do compositing when root is a canvas and have multiple zlevels.
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*/
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this._needsManuallyCompositing = false;
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if (!singleCanvas) {
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this._width = this._getSize(0);
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this._height = this._getSize(1);
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var domRoot = this._domRoot = createRoot(this._width, this._height);
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root.appendChild(domRoot);
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} else {
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var width = root.width;
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var height = root.height;
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if (opts.width != null) {
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width = opts.width;
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}
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if (opts.height != null) {
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height = opts.height;
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}
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this.dpr = opts.devicePixelRatio || 1; // Use canvas width and height directly
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root.width = width * this.dpr;
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root.height = height * this.dpr;
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this._width = width;
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this._height = height; // Create layer if only one given canvas
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// Device can be specified to create a high dpi image.
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var mainLayer = new Layer(root, this, this.dpr);
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mainLayer.__builtin__ = true;
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mainLayer.initContext(); // FIXME Use canvas width and height
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// mainLayer.resize(width, height);
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layers[CANVAS_ZLEVEL] = mainLayer;
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mainLayer.zlevel = CANVAS_ZLEVEL; // Not use common zlevel.
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zlevelList.push(CANVAS_ZLEVEL);
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this._domRoot = root;
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}
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/**
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* @type {module:zrender/Layer}
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* @private
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*/
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this._hoverlayer = null;
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this._hoverElements = [];
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};
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Painter.prototype = {
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constructor: Painter,
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getType: function () {
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return 'canvas';
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},
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/**
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* If painter use a single canvas
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* @return {boolean}
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*/
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isSingleCanvas: function () {
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return this._singleCanvas;
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},
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/**
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* @return {HTMLDivElement}
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*/
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getViewportRoot: function () {
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return this._domRoot;
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},
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getViewportRootOffset: function () {
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var viewportRoot = this.getViewportRoot();
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if (viewportRoot) {
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return {
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offsetLeft: viewportRoot.offsetLeft || 0,
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offsetTop: viewportRoot.offsetTop || 0
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};
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}
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},
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/**
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* 刷新
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* @param {boolean} [paintAll=false] 强制绘制所有displayable
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*/
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refresh: function (paintAll) {
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var list = this.storage.getDisplayList(true);
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var zlevelList = this._zlevelList;
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this._redrawId = Math.random();
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this._paintList(list, paintAll, this._redrawId); // Paint custum layers
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for (var i = 0; i < zlevelList.length; i++) {
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var z = zlevelList[i];
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var layer = this._layers[z];
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if (!layer.__builtin__ && layer.refresh) {
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var clearColor = i === 0 ? this._backgroundColor : null;
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layer.refresh(clearColor);
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}
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}
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this.refreshHover();
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return this;
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},
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addHover: function (el, hoverStyle) {
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if (el.__hoverMir) {
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return;
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}
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var elMirror = new el.constructor({
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style: el.style,
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shape: el.shape,
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z: el.z,
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z2: el.z2,
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silent: el.silent
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});
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elMirror.__from = el;
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el.__hoverMir = elMirror;
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hoverStyle && elMirror.setStyle(hoverStyle);
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this._hoverElements.push(elMirror);
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return elMirror;
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},
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removeHover: function (el) {
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var elMirror = el.__hoverMir;
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var hoverElements = this._hoverElements;
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var idx = util.indexOf(hoverElements, elMirror);
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if (idx >= 0) {
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hoverElements.splice(idx, 1);
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}
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el.__hoverMir = null;
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},
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clearHover: function (el) {
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var hoverElements = this._hoverElements;
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for (var i = 0; i < hoverElements.length; i++) {
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var from = hoverElements[i].__from;
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if (from) {
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from.__hoverMir = null;
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}
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}
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hoverElements.length = 0;
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},
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refreshHover: function () {
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var hoverElements = this._hoverElements;
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var len = hoverElements.length;
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var hoverLayer = this._hoverlayer;
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hoverLayer && hoverLayer.clear();
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if (!len) {
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return;
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}
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timsort(hoverElements, this.storage.displayableSortFunc); // Use a extream large zlevel
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// FIXME?
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if (!hoverLayer) {
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hoverLayer = this._hoverlayer = this.getLayer(HOVER_LAYER_ZLEVEL);
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}
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var scope = {};
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hoverLayer.ctx.save();
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for (var i = 0; i < len;) {
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var el = hoverElements[i];
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var originalEl = el.__from; // Original el is removed
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// PENDING
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if (!(originalEl && originalEl.__zr)) {
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hoverElements.splice(i, 1);
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originalEl.__hoverMir = null;
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len--;
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continue;
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}
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i++; // Use transform
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// FIXME style and shape ?
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if (!originalEl.invisible) {
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el.transform = originalEl.transform;
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el.invTransform = originalEl.invTransform;
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el.__clipPaths = originalEl.__clipPaths; // el.
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this._doPaintEl(el, hoverLayer, true, scope);
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}
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}
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hoverLayer.ctx.restore();
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},
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getHoverLayer: function () {
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return this.getLayer(HOVER_LAYER_ZLEVEL);
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},
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_paintList: function (list, paintAll, redrawId) {
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if (this._redrawId !== redrawId) {
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return;
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}
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paintAll = paintAll || false;
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this._updateLayerStatus(list);
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var finished = this._doPaintList(list, paintAll);
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if (this._needsManuallyCompositing) {
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this._compositeManually();
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}
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if (!finished) {
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var self = this;
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requestAnimationFrame(function () {
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self._paintList(list, paintAll, redrawId);
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});
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}
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},
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_compositeManually: function () {
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var ctx = this.getLayer(CANVAS_ZLEVEL).ctx;
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var width = this._domRoot.width;
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var height = this._domRoot.height;
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ctx.clearRect(0, 0, width, height); // PENDING, If only builtin layer?
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this.eachBuiltinLayer(function (layer) {
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if (layer.virtual) {
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ctx.drawImage(layer.dom, 0, 0, width, height);
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}
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});
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},
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_doPaintList: function (list, paintAll) {
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var layerList = [];
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for (var zi = 0; zi < this._zlevelList.length; zi++) {
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var zlevel = this._zlevelList[zi];
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var layer = this._layers[zlevel];
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if (layer.__builtin__ && layer !== this._hoverlayer && (layer.__dirty || paintAll)) {
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layerList.push(layer);
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}
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}
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var finished = true;
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for (var k = 0; k < layerList.length; k++) {
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var layer = layerList[k];
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var ctx = layer.ctx;
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var scope = {};
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ctx.save();
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var start = paintAll ? layer.__startIndex : layer.__drawIndex;
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var useTimer = !paintAll && layer.incremental && Date.now;
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var startTime = useTimer && Date.now();
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var clearColor = layer.zlevel === this._zlevelList[0] ? this._backgroundColor : null; // All elements in this layer are cleared.
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if (layer.__startIndex === layer.__endIndex) {
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layer.clear(false, clearColor);
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} else if (start === layer.__startIndex) {
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var firstEl = list[start];
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if (!firstEl.incremental || !firstEl.notClear || paintAll) {
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layer.clear(false, clearColor);
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}
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}
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if (start === -1) {
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console.error('For some unknown reason. drawIndex is -1');
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start = layer.__startIndex;
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}
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for (var i = start; i < layer.__endIndex; i++) {
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var el = list[i];
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this._doPaintEl(el, layer, paintAll, scope);
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el.__dirty = el.__dirtyText = false;
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if (useTimer) {
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// Date.now can be executed in 13,025,305 ops/second.
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var dTime = Date.now() - startTime; // Give 15 millisecond to draw.
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// The rest elements will be drawn in the next frame.
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if (dTime > 15) {
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break;
|
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}
|
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}
|
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}
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layer.__drawIndex = i;
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|
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if (layer.__drawIndex < layer.__endIndex) {
|
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finished = false;
|
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}
|
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|
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if (scope.prevElClipPaths) {
|
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// Needs restore the state. If last drawn element is in the clipping area.
|
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ctx.restore();
|
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}
|
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|
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ctx.restore();
|
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}
|
||
|
||
if (env.wxa) {
|
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// Flush for weixin application
|
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util.each(this._layers, function (layer) {
|
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if (layer && layer.ctx && layer.ctx.draw) {
|
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layer.ctx.draw();
|
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}
|
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});
|
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}
|
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|
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return finished;
|
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},
|
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_doPaintEl: function (el, currentLayer, forcePaint, scope) {
|
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var ctx = currentLayer.ctx;
|
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var m = el.transform;
|
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|
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if ((currentLayer.__dirty || forcePaint) && // Ignore invisible element
|
||
!el.invisible // Ignore transparent element
|
||
&& el.style.opacity !== 0 // Ignore scale 0 element, in some environment like node-canvas
|
||
// Draw a scale 0 element can cause all following draw wrong
|
||
// And setTransform with scale 0 will cause set back transform failed.
|
||
&& !(m && !m[0] && !m[3]) // Ignore culled element
|
||
&& !(el.culling && isDisplayableCulled(el, this._width, this._height))) {
|
||
var clipPaths = el.__clipPaths; // Optimize when clipping on group with several elements
|
||
|
||
if (!scope.prevElClipPaths || isClipPathChanged(clipPaths, scope.prevElClipPaths)) {
|
||
// If has previous clipping state, restore from it
|
||
if (scope.prevElClipPaths) {
|
||
currentLayer.ctx.restore();
|
||
scope.prevElClipPaths = null; // Reset prevEl since context has been restored
|
||
|
||
scope.prevEl = null;
|
||
} // New clipping state
|
||
|
||
|
||
if (clipPaths) {
|
||
ctx.save();
|
||
doClip(clipPaths, ctx);
|
||
scope.prevElClipPaths = clipPaths;
|
||
}
|
||
}
|
||
|
||
el.beforeBrush && el.beforeBrush(ctx);
|
||
el.brush(ctx, scope.prevEl || null);
|
||
scope.prevEl = el;
|
||
el.afterBrush && el.afterBrush(ctx);
|
||
}
|
||
},
|
||
|
||
/**
|
||
* 获取 zlevel 所在层，如果不存在则会创建一个新的层
|
||
* @param {number} zlevel
|
||
* @param {boolean} virtual Virtual layer will not be inserted into dom.
|
||
* @return {module:zrender/Layer}
|
||
*/
|
||
getLayer: function (zlevel, virtual) {
|
||
if (this._singleCanvas && !this._needsManuallyCompositing) {
|
||
zlevel = CANVAS_ZLEVEL;
|
||
}
|
||
|
||
var layer = this._layers[zlevel];
|
||
|
||
if (!layer) {
|
||
// Create a new layer
|
||
layer = new Layer('zr_' + zlevel, this, this.dpr);
|
||
layer.zlevel = zlevel;
|
||
layer.__builtin__ = true;
|
||
|
||
if (this._layerConfig[zlevel]) {
|
||
util.merge(layer, this._layerConfig[zlevel], true);
|
||
}
|
||
|
||
if (virtual) {
|
||
layer.virtual = virtual;
|
||
}
|
||
|
||
this.insertLayer(zlevel, layer); // Context is created after dom inserted to document
|
||
// Or excanvas will get 0px clientWidth and clientHeight
|
||
|
||
layer.initContext();
|
||
}
|
||
|
||
return layer;
|
||
},
|
||
insertLayer: function (zlevel, layer) {
|
||
var layersMap = this._layers;
|
||
var zlevelList = this._zlevelList;
|
||
var len = zlevelList.length;
|
||
var prevLayer = null;
|
||
var i = -1;
|
||
var domRoot = this._domRoot;
|
||
|
||
if (layersMap[zlevel]) {
|
||
log('ZLevel ' + zlevel + ' has been used already');
|
||
return;
|
||
} // Check if is a valid layer
|
||
|
||
|
||
if (!isLayerValid(layer)) {
|
||
log('Layer of zlevel ' + zlevel + ' is not valid');
|
||
return;
|
||
}
|
||
|
||
if (len > 0 && zlevel > zlevelList[0]) {
|
||
for (i = 0; i < len - 1; i++) {
|
||
if (zlevelList[i] < zlevel && zlevelList[i + 1] > zlevel) {
|
||
break;
|
||
}
|
||
}
|
||
|
||
prevLayer = layersMap[zlevelList[i]];
|
||
}
|
||
|
||
zlevelList.splice(i + 1, 0, zlevel);
|
||
layersMap[zlevel] = layer; // Vitual layer will not directly show on the screen.
|
||
// (It can be a WebGL layer and assigned to a ZImage element)
|
||
// But it still under management of zrender.
|
||
|
||
if (!layer.virtual) {
|
||
if (prevLayer) {
|
||
var prevDom = prevLayer.dom;
|
||
|
||
if (prevDom.nextSibling) {
|
||
domRoot.insertBefore(layer.dom, prevDom.nextSibling);
|
||
} else {
|
||
domRoot.appendChild(layer.dom);
|
||
}
|
||
} else {
|
||
if (domRoot.firstChild) {
|
||
domRoot.insertBefore(layer.dom, domRoot.firstChild);
|
||
} else {
|
||
domRoot.appendChild(layer.dom);
|
||
}
|
||
}
|
||
}
|
||
},
|
||
// Iterate each layer
|
||
eachLayer: function (cb, context) {
|
||
var zlevelList = this._zlevelList;
|
||
var z;
|
||
var i;
|
||
|
||
for (i = 0; i < zlevelList.length; i++) {
|
||
z = zlevelList[i];
|
||
cb.call(context, this._layers[z], z);
|
||
}
|
||
},
|
||
// Iterate each buildin layer
|
||
eachBuiltinLayer: function (cb, context) {
|
||
var zlevelList = this._zlevelList;
|
||
var layer;
|
||
var z;
|
||
var i;
|
||
|
||
for (i = 0; i < zlevelList.length; i++) {
|
||
z = zlevelList[i];
|
||
layer = this._layers[z];
|
||
|
||
if (layer.__builtin__) {
|
||
cb.call(context, layer, z);
|
||
}
|
||
}
|
||
},
|
||
// Iterate each other layer except buildin layer
|
||
eachOtherLayer: function (cb, context) {
|
||
var zlevelList = this._zlevelList;
|
||
var layer;
|
||
var z;
|
||
var i;
|
||
|
||
for (i = 0; i < zlevelList.length; i++) {
|
||
z = zlevelList[i];
|
||
layer = this._layers[z];
|
||
|
||
if (!layer.__builtin__) {
|
||
cb.call(context, layer, z);
|
||
}
|
||
}
|
||
},
|
||
|
||
/**
|
||
* 获取所有已创建的层
|
||
* @param {Array.<module:zrender/Layer>} [prevLayer]
|
||
*/
|
||
getLayers: function () {
|
||
return this._layers;
|
||
},
|
||
_updateLayerStatus: function (list) {
|
||
this.eachBuiltinLayer(function (layer, z) {
|
||
layer.__dirty = layer.__used = false;
|
||
});
|
||
|
||
function updatePrevLayer(idx) {
|
||
if (prevLayer) {
|
||
if (prevLayer.__endIndex !== idx) {
|
||
prevLayer.__dirty = true;
|
||
}
|
||
|
||
prevLayer.__endIndex = idx;
|
||
}
|
||
}
|
||
|
||
if (this._singleCanvas) {
|
||
for (var i = 1; i < list.length; i++) {
|
||
var el = list[i];
|
||
|
||
if (el.zlevel !== list[i - 1].zlevel || el.incremental) {
|
||
this._needsManuallyCompositing = true;
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
var prevLayer = null;
|
||
var incrementalLayerCount = 0;
|
||
|
||
for (var i = 0; i < list.length; i++) {
|
||
var el = list[i];
|
||
var zlevel = el.zlevel;
|
||
var layer; // PENDING If change one incremental element style ?
|
||
// TODO Where there are non-incremental elements between incremental elements.
|
||
|
||
if (el.incremental) {
|
||
layer = this.getLayer(zlevel + INCREMENTAL_INC, this._needsManuallyCompositing);
|
||
layer.incremental = true;
|
||
incrementalLayerCount = 1;
|
||
} else {
|
||
layer = this.getLayer(zlevel + (incrementalLayerCount > 0 ? EL_AFTER_INCREMENTAL_INC : 0), this._needsManuallyCompositing);
|
||
}
|
||
|
||
if (!layer.__builtin__) {
|
||
log('ZLevel ' + zlevel + ' has been used by unkown layer ' + layer.id);
|
||
}
|
||
|
||
if (layer !== prevLayer) {
|
||
layer.__used = true;
|
||
|
||
if (layer.__startIndex !== i) {
|
||
layer.__dirty = true;
|
||
}
|
||
|
||
layer.__startIndex = i;
|
||
|
||
if (!layer.incremental) {
|
||
layer.__drawIndex = i;
|
||
} else {
|
||
// Mark layer draw index needs to update.
|
||
layer.__drawIndex = -1;
|
||
}
|
||
|
||
updatePrevLayer(i);
|
||
prevLayer = layer;
|
||
}
|
||
|
||
if (el.__dirty) {
|
||
layer.__dirty = true;
|
||
|
||
if (layer.incremental && layer.__drawIndex < 0) {
|
||
// Start draw from the first dirty element.
|
||
layer.__drawIndex = i;
|
||
}
|
||
}
|
||
}
|
||
|
||
updatePrevLayer(i);
|
||
this.eachBuiltinLayer(function (layer, z) {
|
||
// Used in last frame but not in this frame. Needs clear
|
||
if (!layer.__used && layer.getElementCount() > 0) {
|
||
layer.__dirty = true;
|
||
layer.__startIndex = layer.__endIndex = layer.__drawIndex = 0;
|
||
} // For incremental layer. In case start index changed and no elements are dirty.
|
||
|
||
|
||
if (layer.__dirty && layer.__drawIndex < 0) {
|
||
layer.__drawIndex = layer.__startIndex;
|
||
}
|
||
});
|
||
},
|
||
|
||
/**
|
||
* 清除hover层外所有内容
|
||
*/
|
||
clear: function () {
|
||
this.eachBuiltinLayer(this._clearLayer);
|
||
return this;
|
||
},
|
||
_clearLayer: function (layer) {
|
||
layer.clear();
|
||
},
|
||
setBackgroundColor: function (backgroundColor) {
|
||
this._backgroundColor = backgroundColor;
|
||
},
|
||
|
||
/**
|
||
* 修改指定zlevel的绘制参数
|
||
*
|
||
* @param {string} zlevel
|
||
* @param {Object} config 配置对象
|
||
* @param {string} [config.clearColor=0] 每次清空画布的颜色
|
||
* @param {string} [config.motionBlur=false] 是否开启动态模糊
|
||
* @param {number} [config.lastFrameAlpha=0.7]
|
||
* 在开启动态模糊的时候使用，与上一帧混合的alpha值，值越大尾迹越明显
|
||
*/
|
||
configLayer: function (zlevel, config) {
|
||
if (config) {
|
||
var layerConfig = this._layerConfig;
|
||
|
||
if (!layerConfig[zlevel]) {
|
||
layerConfig[zlevel] = config;
|
||
} else {
|
||
util.merge(layerConfig[zlevel], config, true);
|
||
}
|
||
|
||
for (var i = 0; i < this._zlevelList.length; i++) {
|
||
var _zlevel = this._zlevelList[i];
|
||
|
||
if (_zlevel === zlevel || _zlevel === zlevel + EL_AFTER_INCREMENTAL_INC) {
|
||
var layer = this._layers[_zlevel];
|
||
util.merge(layer, layerConfig[zlevel], true);
|
||
}
|
||
}
|
||
}
|
||
},
|
||
|
||
/**
|
||
* 删除指定层
|
||
* @param {number} zlevel 层所在的zlevel
|
||
*/
|
||
delLayer: function (zlevel) {
|
||
var layers = this._layers;
|
||
var zlevelList = this._zlevelList;
|
||
var layer = layers[zlevel];
|
||
|
||
if (!layer) {
|
||
return;
|
||
}
|
||
|
||
layer.dom.parentNode.removeChild(layer.dom);
|
||
delete layers[zlevel];
|
||
zlevelList.splice(util.indexOf(zlevelList, zlevel), 1);
|
||
},
|
||
|
||
/**
|
||
* 区域大小变化后重绘
|
||
*/
|
||
resize: function (width, height) {
|
||
if (!this._domRoot.style) {
|
||
// Maybe in node or worker
|
||
if (width == null || height == null) {
|
||
return;
|
||
}
|
||
|
||
this._width = width;
|
||
this._height = height;
|
||
this.getLayer(CANVAS_ZLEVEL).resize(width, height);
|
||
} else {
|
||
var domRoot = this._domRoot; // FIXME Why ?
|
||
|
||
domRoot.style.display = 'none'; // Save input w/h
|
||
|
||
var opts = this._opts;
|
||
width != null && (opts.width = width);
|
||
height != null && (opts.height = height);
|
||
width = this._getSize(0);
|
||
height = this._getSize(1);
|
||
domRoot.style.display = ''; // 优化没有实际改变的resize
|
||
|
||
if (this._width !== width || height !== this._height) {
|
||
domRoot.style.width = width + 'px';
|
||
domRoot.style.height = height + 'px';
|
||
|
||
for (var id in this._layers) {
|
||
if (this._layers.hasOwnProperty(id)) {
|
||
this._layers[id].resize(width, height);
|
||
}
|
||
}
|
||
|
||
util.each(this._progressiveLayers, function (layer) {
|
||
layer.resize(width, height);
|
||
});
|
||
this.refresh(true);
|
||
}
|
||
|
||
this._width = width;
|
||
this._height = height;
|
||
}
|
||
|
||
return this;
|
||
},
|
||
|
||
/**
|
||
* 清除单独的一个层
|
||
* @param {number} zlevel
|
||
*/
|
||
clearLayer: function (zlevel) {
|
||
var layer = this._layers[zlevel];
|
||
|
||
if (layer) {
|
||
layer.clear();
|
||
}
|
||
},
|
||
|
||
/**
|
||
* 释放
|
||
*/
|
||
dispose: function () {
|
||
this.root.innerHTML = '';
|
||
this.root = this.storage = this._domRoot = this._layers = null;
|
||
},
|
||
|
||
/**
|
||
* Get canvas which has all thing rendered
|
||
* @param {Object} opts
|
||
* @param {string} [opts.backgroundColor]
|
||
* @param {number} [opts.pixelRatio]
|
||
*/
|
||
getRenderedCanvas: function (opts) {
|
||
opts = opts || {};
|
||
|
||
if (this._singleCanvas && !this._compositeManually) {
|
||
return this._layers[CANVAS_ZLEVEL].dom;
|
||
}
|
||
|
||
var imageLayer = new Layer('image', this, opts.pixelRatio || this.dpr);
|
||
imageLayer.initContext();
|
||
imageLayer.clear(false, opts.backgroundColor || this._backgroundColor);
|
||
|
||
if (opts.pixelRatio <= this.dpr) {
|
||
this.refresh();
|
||
var width = imageLayer.dom.width;
|
||
var height = imageLayer.dom.height;
|
||
var ctx = imageLayer.ctx;
|
||
this.eachLayer(function (layer) {
|
||
if (layer.__builtin__) {
|
||
ctx.drawImage(layer.dom, 0, 0, width, height);
|
||
} else if (layer.renderToCanvas) {
|
||
imageLayer.ctx.save();
|
||
layer.renderToCanvas(imageLayer.ctx);
|
||
imageLayer.ctx.restore();
|
||
}
|
||
});
|
||
} else {
|
||
// PENDING, echarts-gl and incremental rendering.
|
||
var scope = {};
|
||
var displayList = this.storage.getDisplayList(true);
|
||
|
||
for (var i = 0; i < displayList.length; i++) {
|
||
var el = displayList[i];
|
||
|
||
this._doPaintEl(el, imageLayer, true, scope);
|
||
}
|
||
}
|
||
|
||
return imageLayer.dom;
|
||
},
|
||
|
||
/**
|
||
* 获取绘图区域宽度
|
||
*/
|
||
getWidth: function () {
|
||
return this._width;
|
||
},
|
||
|
||
/**
|
||
* 获取绘图区域高度
|
||
*/
|
||
getHeight: function () {
|
||
return this._height;
|
||
},
|
||
_getSize: function (whIdx) {
|
||
var opts = this._opts;
|
||
var wh = ['width', 'height'][whIdx];
|
||
var cwh = ['clientWidth', 'clientHeight'][whIdx];
|
||
var plt = ['paddingLeft', 'paddingTop'][whIdx];
|
||
var prb = ['paddingRight', 'paddingBottom'][whIdx];
|
||
|
||
if (opts[wh] != null && opts[wh] !== 'auto') {
|
||
return parseFloat(opts[wh]);
|
||
}
|
||
|
||
var root = this.root; // IE8 does not support getComputedStyle, but it use VML.
|
||
|
||
var stl = document.defaultView.getComputedStyle(root);
|
||
return (root[cwh] || parseInt10(stl[wh]) || parseInt10(root.style[wh])) - (parseInt10(stl[plt]) || 0) - (parseInt10(stl[prb]) || 0) | 0;
|
||
},
|
||
pathToImage: function (path, dpr) {
|
||
dpr = dpr || this.dpr;
|
||
var canvas = document.createElement('canvas');
|
||
var ctx = canvas.getContext('2d');
|
||
var rect = path.getBoundingRect();
|
||
var style = path.style;
|
||
var shadowBlurSize = style.shadowBlur * dpr;
|
||
var shadowOffsetX = style.shadowOffsetX * dpr;
|
||
var shadowOffsetY = style.shadowOffsetY * dpr;
|
||
var lineWidth = style.hasStroke() ? style.lineWidth : 0;
|
||
var leftMargin = Math.max(lineWidth / 2, -shadowOffsetX + shadowBlurSize);
|
||
var rightMargin = Math.max(lineWidth / 2, shadowOffsetX + shadowBlurSize);
|
||
var topMargin = Math.max(lineWidth / 2, -shadowOffsetY + shadowBlurSize);
|
||
var bottomMargin = Math.max(lineWidth / 2, shadowOffsetY + shadowBlurSize);
|
||
var width = rect.width + leftMargin + rightMargin;
|
||
var height = rect.height + topMargin + bottomMargin;
|
||
canvas.width = width * dpr;
|
||
canvas.height = height * dpr;
|
||
ctx.scale(dpr, dpr);
|
||
ctx.clearRect(0, 0, width, height);
|
||
ctx.dpr = dpr;
|
||
var pathTransform = {
|
||
position: path.position,
|
||
rotation: path.rotation,
|
||
scale: path.scale
|
||
};
|
||
path.position = [leftMargin - rect.x, topMargin - rect.y];
|
||
path.rotation = 0;
|
||
path.scale = [1, 1];
|
||
path.updateTransform();
|
||
|
||
if (path) {
|
||
path.brush(ctx);
|
||
}
|
||
|
||
var ImageShape = Image;
|
||
var imgShape = new ImageShape({
|
||
style: {
|
||
x: 0,
|
||
y: 0,
|
||
image: canvas
|
||
}
|
||
});
|
||
|
||
if (pathTransform.position != null) {
|
||
imgShape.position = path.position = pathTransform.position;
|
||
}
|
||
|
||
if (pathTransform.rotation != null) {
|
||
imgShape.rotation = path.rotation = pathTransform.rotation;
|
||
}
|
||
|
||
if (pathTransform.scale != null) {
|
||
imgShape.scale = path.scale = pathTransform.scale;
|
||
}
|
||
|
||
return imgShape;
|
||
}
|
||
};
|
||
var _default = Painter;
|
||
module.exports = _default; |