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bitmap.js
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bitmap.js
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/**
* The MIT License (MIT)
*
* Copyright (c) 2023 Toha <tohenk@yahoo.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is furnished to do
* so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
const fs = require('fs');
const path = require('path');
const dp = require('..');
let xstatus = null;
let seq = 0;
dp.init();
console.log('Readers:', dp.getReaders());
console.log('\n=== Capture raw image, press Ctrl+C to end ===\n');
process.on('SIGINT', () => {
console.log('Please wait doing cleanup...')
dp.exit();
});
function capture(callback) {
dp.startAcquire({raw: true}, (status, data) => {
switch (status) {
case 'disconnected':
if (xstatus != status) {
console.log('Please connect fingerprint reader...');
}
break;
case 'connected':
console.log('Swipe your finger to capture the image...');
break;
case 'error':
break;
case 'complete':
dp.stopAcquire(() => {
callback(data);
});
break;
}
xstatus = status;
});
}
(function f() {
capture(async data => {
let filename;
try {
while (true) {
filename = path.join(process.cwd(), `finger${++seq > 0 ? seq : ''}.bmp`);
if (!fs.existsSync(filename)) {
break;
}
}
fs.writeFileSync(filename, Buffer.from(data));
console.log(`Saved to ${filename}`);
}
catch (err) {
console.error(err);
}
f();
});
})();