taro-code/lib/common/canvas/barcode.js

Taro.js barcode & qrcode, Image & Canvas

import Taro from '@tarojs/taro';
import code128 from '../barcode/code128';
export function drawCanvasBarcode(text, options) {
    const pieces = code128(text);
    const canvas = options.canvas;
    const dpr = Taro.getSystemInfoSync().pixelRatio;
    canvas.width = options.width * dpr;
    canvas.height = options.height * dpr;
    const width = canvas.width;
    const height = canvas.height;
    const ctx = canvas.getContext('2d');
    ctx.fillStyle = options.backgroundColor;
    ctx.fillRect(0, 0, width + options.padding * 2, width + options.padding * 2);
    const tileW = (width - options.padding * 2) / pieces.length;
    const tileH = height - options.padding * 2;
    for (let col = 0; col < pieces.length; col++) {
        ctx.fillStyle = pieces[col] === 1 ? options.foregroundColor : options.backgroundColor;
        const w = Math.ceil((col + 1) * tileW) - Math.floor(col * tileW);
        const h = tileH;
        ctx.fillRect(Math.round(col * tileW) + options.padding, options.padding, w, h);
    }
}
//# sourceMappingURL=barcode.js.map