LobbyDisplayHelper.kt (1611B)
1 /* 2 This file is part of GNUnet. 3 Copyright (C) 2021--2025 GNUnet e.V. 4 5 GNUnet is free software: you can redistribute it and/or modify it 6 under the terms of the GNU Affero General Public License as published 7 by the Free Software Foundation, either version 3 of the License, 8 or (at your option) any later version. 9 10 GNUnet is distributed in the hope that it will be useful, but 11 WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 Affero General Public License for more details. 14 15 You should have received a copy of the GNU Affero General Public License 16 along with this program. If not, see <http://www.gnu.org/licenses/>. 17 18 SPDX-License-Identifier: AGPL3.0-or-later 19 */ 20 /* 21 * @author t3sserakt 22 * @file GNUnetMessenger/app/src/main/java/org/gnunet/gnunetmessenger/ui/util/LobbyDisplayHelper.kt 23 */ 24 25 package org.gnunet.gnunetmessenger.util 26 27 import android.graphics.Bitmap 28 import android.graphics.Color 29 import com.google.zxing.BarcodeFormat 30 import com.google.zxing.qrcode.QRCodeWriter 31 32 object LobbyDisplayHelper { 33 fun generateQRCode(data: String): Bitmap { 34 val size = 512 35 val qrCodeWriter = QRCodeWriter() 36 val bitMatrix = qrCodeWriter.encode(data, BarcodeFormat.QR_CODE, size, size) 37 val bitmap = Bitmap.createBitmap(size, size, Bitmap.Config.RGB_565) 38 for (x in 0 until size) { 39 for (y in 0 until size) { 40 bitmap.setPixel(x, y, if (bitMatrix.get(x, y)) Color.BLACK else Color.WHITE) 41 } 42 } 43 return bitmap 44 } 45 }