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fea56cdd61
* Add Browser implementation of the BwipJs function * Use $ExpectType in unit test for types
53 lines
1.7 KiB
TypeScript
53 lines
1.7 KiB
TypeScript
import bwipjs = require('bwip-js');
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import * as http from 'http';
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import * as fs from 'fs';
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bwipjs.loadFont('Inconsolata', 108,
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fs.readFileSync('fonts/Inconsolata.otf', 'binary'));
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http.createServer(function(req, res) {
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// If the url does not begin /?bcid= then 404. Otherwise, we end up
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// returning 400 on requests like favicon.ico.
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if (req.url!.indexOf('/?bcid=') != 0) {
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res.writeHead(404, { 'Content-Type':'text/plain' });
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res.end('BWIPJS: Unknown request format.', 'utf8');
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} else {
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bwipjs(req, res);
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}
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}).listen(3030);
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bwipjs.toBuffer({
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bcid: 'code128', // Barcode type
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text: '0123456789', // Text to encode
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scale: 3, // 3x scaling factor
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height: 10, // Bar height, in millimeters
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includetext: true, // Show human-readable text
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textxalign: 'center', // Always good to set this
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textfont: 'Inconsolata', // Use your custom font
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textsize: 13 // Font size, in points
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}, function (err:string|Error, png: Buffer) {
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if (err) {
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console.log(err);
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} else {
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// `png` is a Buffer
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// png.length : PNG file length
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// png.readUInt32BE(16) : PNG image width
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// png.readUInt32BE(20) : PNG image height
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}
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});
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// Browser canvas implementation
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const canvas = document.createElement('canvas') as HTMLCanvasElement;
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bwipjs(canvas, {
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bcid: 'qrcode',
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text: 'example',
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}, (err?: string | Error, cvs?: HTMLCanvasElement): void => {
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if (err) {
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err; // $ExpectType string | Error
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} else if (cvs) {
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cvs; // $ExpectType HTMLCanvasElement
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}
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});
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