Function makeImage

libs/echarts/echarts-en.simple.js:16968–16988

* Create a image element from image url * @param {string} imageUrl image url * @param {Object} opts options * @param {module:zrender/core/BoundingRect} rect constrain rect * @param {string} [layout=cover] 'center' or 'cover'

(imageUrl, rect, layout)

 * @param {string} [layout=cover] 'center' or 'cover'
 */
function makeImage(imageUrl, rect, layout) {
    var path = new ZImage({
        style: {
            image: imageUrl,
            x: rect.x,
            y: rect.y,
            width: rect.width,
            height: rect.height
        },
        onload: function (img) {
            if (layout === 'center') {
                var boundingRect = {
                    width: img.width,
                    height: img.height
                };
                path.setStyle(centerGraphic(rect, boundingRect));
            }
        }
    });
    return path;
}

/**
 * Get position of centered element in bounding box.