draw-html-to-canvas/example/weixin/lib/wx.adapter.js

根据html+css规范绘制 网页到canvas

'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

/**
 * 同层渲染api兼容方法
 * @param canvas
 */
function loadGreaterThan_2_9_0(canvas) {
    var _this = this;
    var src = this.attrs.src;
    return new Promise(function (resolve, reject) {
        if (src) {
            // 微信小程序专属的api
            // @ts-ignore
            var img_1 = canvas.createImage();
            img_1.onerror = function (e) {
                reject(e);
                if (_this.root.debug) {
                    console.log('image loaded error', src, e);
                }
            };
            img_1.onload = function () {
                _this.imageWidth = img_1.width;
                _this.imageHeight = img_1.height;
                _this.source = img_1;
                _this.src = src;
                resolve(_this);
                if (_this.root.debug) {
                    console.log('image loaded', src, img_1.width, img_1.height);
                }
            };
            img_1.src = src;
        }
        else {
            resolve(_this);
        }
    });
}
/**
 * native渲染api兼容方法
 * @param wx 全局方法对象
 */
function loadGreaterThan_1_9_0(wx) {
    var _this = this;
    var src = this.attrs.src;
    return new Promise(function (resolve, reject) {
        if (src) {
            // 微信小程序专属的api
            // @ts-ignore
            wx.getImageInfo({
                src: src,
                success: function (info) {
                    _this.imageWidth = info.width;
                    _this.imageHeight = info.height;
                    // @ts-ignore
                    _this.source = /^http/.test(src) ? info.path : src;
                    _this.src = src;
                    resolve(_this);
                    if (_this.root.debug) {
                        console.log('image loaded', src, info.width, info.height);
                    }
                },
                fail: function (e) {
                    reject(e);
                    if (_this.root.debug) {
                        console.log('image loaded error', src, e);
                    }
                },
            });
        }
        else {
            resolve(_this);
        }
    });
}

exports.loadGreaterThan_1_9_0 = loadGreaterThan_1_9_0;
exports.loadGreaterThan_2_9_0 = loadGreaterThan_2_9_0;