js base64顺时针旋转90度得到新的base64

js base64顺时针旋转90度得到新的base64

const img = new Image();
img.src = data;
load = () => {
const canvas = ateElement(‘canvas’);
canvas.width = img.height;
canvas.height = img.width;
const ctx = Context(‘2d’);
anslate(img.height, 0);
ate(90 * Math.PI / 180);
ctx.drawImage(img, 0, 0, img.width, img.height);
const newBase64Str = DataURL(‘image/jpeg’, 1.0);
setBackgroundImage(newBase64Str)