import { PAPER_SIZE } from './constant';

export function setCanvasSize(canvas: Canvas, paperSize: PaperSize) {
    const sizeObj = PAPER_SIZE[paperSize];
    // const { pixelRatio: dpr, windowWidth, windowHeight } = wx.getWindowInfo();
    // const printWidth = A4.width;
    // const printHeight = A4.height;
    // @ts-ignore
    // const originWidth = canvas._width || windowWidth;
    // // @ts-ignore
    // const originHeight = canvas._height || windowHeight;

    canvas.width = sizeObj.width;
    canvas.height = sizeObj.height;
    console.log('canvas----:', canvas);
    return canvas;
}

export async function getMiniCodeImage(canvas: Canvas) {
    return getImage(canvas, '/assets/imgs/mini-code.jpg');
}

export async function getImage(canvas: Canvas, path: string) {
    return new Promise((resolve, reject) => {
        const image = canvas.createImage();
        image.onload = () => {
            resolve(image);
        };
        image.onerror = () => {
            reject('图片加载异常');
        };
        image.src = path;
    });
}