import project

qr.go

@@ -0,0 +1,57 @@
+/*
+ *    Copyright (c) 2018 Unrud<unrud@outlook.com>
+ *
+ *    This file is part of Remote-Touchpad.
+ *
+ *    Foobar is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, either version 3 of the License, or
+ *    (at your option) any later version.
+ *
+ *    Remote-Touchpad is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with Foobar.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package main
+
+import qrcode "github.com/skip2/go-qrcode"
+
+func GenerateQRCode(message string, invert bool) (string, error) {
+	q, err := qrcode.New(message, qrcode.Medium)
+	if err != nil {
+		return "", err
+	}
+	return qrCodeToString(q.Bitmap(), invert), nil
+}
+
+func qrCodeToString(bits [][]bool, invert bool) string {
+	s := ""
+	for y := -1; y < len(bits); y += 2 {
+		for x := range bits[0] {
+			upper := !invert
+			if 0 <= y && y < len(bits) {
+				upper = bits[y][x]
+			}
+			lower := !invert
+			if 0 <= y+1 && y+1 < len(bits) {
+				lower = bits[y+1][x]
+			}
+			if upper != invert && lower != invert {
+				s += " "
+			} else if upper == invert && lower != invert {
+				s += "▀"
+			} else if upper != invert && lower == invert {
+				s += "▄"
+			} else {
+				s += "█"
+			}
+		}
+		s += "\n"
+	}
+	return s
+}