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