mirror of
https://github.com/zint/zint
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108 lines
2.6 KiB
C
108 lines
2.6 KiB
C
/* qr.c Handles QR Code by utilising libqrencode */
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/*
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libzint - the open source barcode library
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Copyright (C) 2008 Robin Stuart <zint@hotmail.co.uk>
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Copyright (C) 2006 Kentaro Fukuchi <fukuchi@megaui.net>
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This program 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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This program 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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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <string.h>
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#include "common.h"
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#ifndef NO_QR
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#include <qrencode.h>
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static int kanji = 0;
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QRcode *encode(int security, int size, const unsigned char *intext)
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{
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int version;
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QRecLevel level;
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QRencodeMode hint;
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QRcode *code;
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level=QR_ECLEVEL_L;
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if(kanji) {
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hint = QR_MODE_KANJI;
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} else {
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hint = QR_MODE_8;
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}
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if((security >= 1) && (security <= 4)) {
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switch (security) {
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case 1: level = QR_ECLEVEL_L; break;
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case 2: level = QR_ECLEVEL_M; break;
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case 3: level = QR_ECLEVEL_Q; break;
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case 4: level = QR_ECLEVEL_H; break;
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}
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} else {
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level = QR_ECLEVEL_L;
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}
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if((size >= 1) && (size <= 40)) {
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version = size;
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} else {
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version = 0;
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}
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code = QRcode_encodeString((char*)intext, version, level, hint, 1);
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return code;
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}
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int qr_code(struct zint_symbol *symbol, unsigned char source[])
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{
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QRcode *code;
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int errno = 0;
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int i, j;
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code = encode(symbol->option_1, symbol->option_2, source);
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if(code == NULL) {
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strcpy(symbol->errtxt, "libqrencode failed to encode the input data [581]");
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return ERROR_ENCODING_PROBLEM;
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}
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symbol->width = code->width;
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symbol->rows = code->width;
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for(i = 0; i < code->width; i++) {
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for(j = 0; j < code->width; j++) {
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if((*(code->data + (i * code->width) + j) & 0x01) == 0) {
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symbol->encoded_data[i][j] = '0';
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} else {
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symbol->encoded_data[i][j] = '1';
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}
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}
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symbol->row_height[i] = 1;
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}
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QRcode_free(code);
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return errno;
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}
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#else
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/* Handler if no QR Encode library is available */
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int qr_code(struct zint_symbol *symbol, unsigned char source[])
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{
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strcpy(symbol->errtxt, "QR Code library <qrencode> not available [580]");
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return ERROR_INVALID_OPTION;
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}
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#endif
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