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Viewing file:     Image.js (2.38 KB)      -rw-r--r--

var Displayable = require("./Displayable");

var BoundingRect = require("../core/BoundingRect");

var zrUtil = require("../core/util");

var imageHelper = require("./helper/image");

/**
 * @alias zrender/graphic/Image
 * @extends module:zrender/graphic/Displayable
 * @constructor
 * @param {Object} opts
 */
function ZImage(opts) {
  Displayable.call(this, opts);
}

ZImage.prototype = {
  constructor: ZImage,
  type: 'image',
  brush: function (ctx, prevEl) {
    var style = this.style;
    var src = style.image; // Must bind each time

    style.bind(ctx, this, prevEl);
    var image = this._image = imageHelper.createOrUpdateImage(src, this._image, this, this.onload);

    if (!image || !imageHelper.isImageReady(image)) {
      return;
    } // 图片已经加载完成
    // if (image.nodeName.toUpperCase() == 'IMG') {
    //     if (!image.complete) {
    //         return;
    //     }
    // }
    // Else is canvas


    var x = style.x || 0;
    var y = style.y || 0;
    var width = style.width;
    var height = style.height;
    var aspect = image.width / image.height;

    if (width == null && height != null) {
      // Keep image/height ratio
      width = height * aspect;
    } else if (height == null && width != null) {
      height = width / aspect;
    } else if (width == null && height == null) {
      width = image.width;
      height = image.height;
    } // 设置transform


    this.setTransform(ctx);

    if (style.sWidth && style.sHeight) {
      var sx = style.sx || 0;
      var sy = style.sy || 0;
      ctx.drawImage(image, sx, sy, style.sWidth, style.sHeight, x, y, width, height);
    } else if (style.sx && style.sy) {
      var sx = style.sx;
      var sy = style.sy;
      var sWidth = width - sx;
      var sHeight = height - sy;
      ctx.drawImage(image, sx, sy, sWidth, sHeight, x, y, width, height);
    } else {
      ctx.drawImage(image, x, y, width, height);
    } // Draw rect text


    if (style.text != null) {
      // Only restore transform when needs draw text.
      this.restoreTransform(ctx);
      this.drawRectText(ctx, this.getBoundingRect());
    }
  },
  getBoundingRect: function () {
    var style = this.style;

    if (!this._rect) {
      this._rect = new BoundingRect(style.x || 0, style.y || 0, style.width || 0, style.height || 0);
    }

    return this._rect;
  }
};
zrUtil.inherits(ZImage, Displayable);
var _default = ZImage;
module.exports = _default;