|
@@ -1,88 +0,0 @@
|
|
|
-import { isString } from '@/utils/is';
|
|
|
-import { RenderQrCodeParams, LogoType } from './typing';
|
|
|
-export const drawLogo = ({ canvas, logo }: RenderQrCodeParams) => {
|
|
|
- if (!logo) {
|
|
|
- return new Promise((resolve) => {
|
|
|
- resolve((canvas as HTMLCanvasElement).toDataURL());
|
|
|
- });
|
|
|
- }
|
|
|
- const canvasWidth = (canvas as HTMLCanvasElement).width;
|
|
|
- const {
|
|
|
- logoSize = 0.15,
|
|
|
- bgColor = '#ffffff',
|
|
|
- borderSize = 0.05,
|
|
|
- crossOrigin,
|
|
|
- borderRadius = 8,
|
|
|
- logoRadius = 0,
|
|
|
- } = logo as LogoType;
|
|
|
-
|
|
|
- const logoSrc: string = isString(logo) ? logo : logo.src;
|
|
|
- const logoWidth = canvasWidth * logoSize;
|
|
|
- const logoXY = (canvasWidth * (1 - logoSize)) / 2;
|
|
|
- const logoBgWidth = canvasWidth * (logoSize + borderSize);
|
|
|
- const logoBgXY = (canvasWidth * (1 - logoSize - borderSize)) / 2;
|
|
|
-
|
|
|
- const ctx = canvas.getContext('2d');
|
|
|
- if (!ctx) return;
|
|
|
-
|
|
|
- // logo 底色
|
|
|
- canvasRoundRect(ctx)(logoBgXY, logoBgXY, logoBgWidth, logoBgWidth, borderRadius);
|
|
|
- ctx.fillStyle = bgColor;
|
|
|
- ctx.fill();
|
|
|
-
|
|
|
- // logo
|
|
|
- const image = new Image();
|
|
|
- if (crossOrigin || logoRadius) {
|
|
|
- image.setAttribute('crossOrigin', crossOrigin || 'anonymous');
|
|
|
- }
|
|
|
- image.src = logoSrc;
|
|
|
-
|
|
|
- // 使用image绘制可以避免某些跨域情况
|
|
|
- const drawLogoWithImage = (image: CanvasImageSource) => {
|
|
|
- ctx.drawImage(image, logoXY, logoXY, logoWidth, logoWidth);
|
|
|
- };
|
|
|
-
|
|
|
- // 使用canvas绘制以获得更多的功能
|
|
|
- const drawLogoWithCanvas = (image: HTMLImageElement) => {
|
|
|
- const canvasImage = document.createElement('canvas');
|
|
|
- canvasImage.width = logoXY + logoWidth;
|
|
|
- canvasImage.height = logoXY + logoWidth;
|
|
|
- const imageCanvas = canvasImage.getContext('2d');
|
|
|
- if (!imageCanvas || !ctx) return;
|
|
|
- imageCanvas.drawImage(image, logoXY, logoXY, logoWidth, logoWidth);
|
|
|
-
|
|
|
- canvasRoundRect(ctx)(logoXY, logoXY, logoWidth, logoWidth, logoRadius);
|
|
|
- if (!ctx) return;
|
|
|
- const fillStyle = ctx.createPattern(canvasImage, 'no-repeat');
|
|
|
- if (fillStyle) {
|
|
|
- ctx.fillStyle = fillStyle;
|
|
|
- ctx.fill();
|
|
|
- }
|
|
|
- };
|
|
|
-
|
|
|
- // 将 logo绘制到 canvas上
|
|
|
- return new Promise((resolve) => {
|
|
|
- image.onload = () => {
|
|
|
- logoRadius ? drawLogoWithCanvas(image) : drawLogoWithImage(image);
|
|
|
- resolve((canvas as HTMLCanvasElement).toDataURL());
|
|
|
- };
|
|
|
- });
|
|
|
-};
|
|
|
-
|
|
|
-// copy来的方法,用于绘制圆角
|
|
|
-function canvasRoundRect(ctx: CanvasRenderingContext2D) {
|
|
|
- return (x: number, y: number, w: number, h: number, r: number) => {
|
|
|
- const minSize = Math.min(w, h);
|
|
|
- if (r > minSize / 2) {
|
|
|
- r = minSize / 2;
|
|
|
- }
|
|
|
- ctx.beginPath();
|
|
|
- ctx.moveTo(x + r, y);
|
|
|
- ctx.arcTo(x + w, y, x + w, y + h, r);
|
|
|
- ctx.arcTo(x + w, y + h, x, y + h, r);
|
|
|
- ctx.arcTo(x, y + h, x, y, r);
|
|
|
- ctx.arcTo(x, y, x + w, y, r);
|
|
|
- ctx.closePath();
|
|
|
- return ctx;
|
|
|
- };
|
|
|
-}
|