PixelAI-admin/src/utils/wartermark.ts

// 页面添加水印效果
const setWatermark = (str: any) => {
	const id = '1.23452384164.123412416';
	if (document.getElementById(id) !== null) document.body.removeChild(document.getElementById(id) as any);
	const can = document.createElement('canvas');
	can.width = 250;
	can.height = 180;
	const cans: any = can.getContext('2d');
	cans.rotate((-20 * Math.PI) / 180);
	cans.font = '12px Vedana';
	cans.fillStyle = 'rgba(200, 200, 200, 0.30)';
	cans.textAlign = 'center';
	cans.textBaseline = 'Middle';
	cans.fillText(str, can.width / 10, can.height / 2);
	const div = document.createElement('div');
	div.id = id;
	div.style.pointerEvents = 'none';
	div.style.top = '35px';
	div.style.left = '0px';
	div.style.position = 'fixed';
	div.style.zIndex = '10000000';
	div.style.width = document.documentElement.clientWidth + 'px';
	div.style.height = document.documentElement.clientHeight + 'px';
	div.style.background = `url(${can.toDataURL('image/png')}) left top repeat`;
	document.body.appendChild(div);
	return id;
};

const watermark = {
	// 设置水印
	set: (str: any) => {
		let id = setWatermark(str);
		if (document.getElementById(id) === null) id = setWatermark(str);
	},
	// 删除水印
	del: () => {
		let id = '1.23452384164.123412416';
		if (document.getElementById(id) !== null) document.body.removeChild(document.getElementById(id) as any);
	},
};

export default watermark;