/**
* qrencode - QR Code encoder
*
* QR Code encoding tool
* Copyright (C) 2006, 2007, 2008, 2009 Kentaro Fukuchi <fukuchi@megaui.net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdio.h>
#include <stdlib.h>
#include <png.h>
#include <getopt.h>
#include "config.h"
#include "qrencode.h"
static int casesensitive = 1;
static int eightbit = 0;
static int version = 0;
static int size = 3;
static int margin = 4;
static int structured = 0;
static QRecLevel level = QR_ECLEVEL_L;
static QRencodeMode hint = QR_MODE_8;
static const struct option options[] = {
{"help" , no_argument , NULL, 'h'},
{"output" , required_argument, NULL, 'o'},
{"level" , required_argument, NULL, 'l'},
{"size" , required_argument, NULL, 's'},
{"symversion" , required_argument, NULL, 'v'},
{"margin" , required_argument, NULL, 'm'},
{"structured" , no_argument , NULL, 'S'},
{"kanji" , no_argument , NULL, 'k'},
{"casesensitive", no_argument , NULL, 'c'},
{"ignorecase" , no_argument , NULL, 'i'},
{"8bit" , no_argument , NULL, '8'},
{"version" , no_argument , NULL, 'V'},
{NULL, 0, NULL, 0}
};
static char *optstring = "ho:l:s:v:m:Skci8V";
static void usage(int help, int longopt)
{
fprintf(stderr,
"qrencode version %s\n"
"Copyright (C) 2006, 2007, 2008, 2009 Kentaro Fukuchi\n", VERSION);
if(help) {
if(longopt) {
fprintf(stderr,
"Usage: qrencode [OPTION]... [STRING]\n"
"Encode input data in a QR Code and save as a PNG image.\n\n"
" -h, --help display the help message. -h displays only the help of short\n"
" options.\n\n"
" -o FILENAME, --output=FILENAME\n"
" write PNG image to FILENAME. If '-' is specified, the result\n"
" will be output to standard output. If -S is given, structured\n"
" symbols are written to FILENAME-01.png, FILENAME-02.png, ...;\n"
" if specified, remove a trailing '.png' from FILENAME.\n\n"
" -s NUMBER, --size=NUMBER\n"
" specify the size of dot (pixel). (default=3)\n\n"
" -l {LMQH}, --level={LMQH}\n"
" specify error collectin level from L (lowest) to H (highest).\n"
" (default=L)\n\n"
" -v NUMBER, --symversion=NUMBER\n"
" specify the version of the symbol. (default=auto)\n\n"
" -m NUMBER, --margin=NUMBER\n"
" specify the width of margin. (default=4)\n\n"
" -S, --structured\n"
" make structured symbols. Version must be specified.\n\n"
" -k, --kanji assume that the input text contains kanji (shift-jis).\n\n"
" -c, --casesensitive\n"
" encode lower-case alphabet characters in 8-bit mode. (default)\n\n"
" -i, --ignorecase\n"
" ignore case distinctions and use only upper-case characters.\n\n"
" -8, -8bit encode entire data in 8-bit mode. -k, -c and -i will be ignored.\n\n"
" -V, --version\n"
" display the version number and copyrights of the qrencode.\n\n"
" [STRING] input data. If it is not specified, data will be taken from\n"
" standard input.\n"
);
} else {
fprintf(stderr,
"Usage: qrencode [OPTION]... [STRING]\n"
"Encode input data in a QR Code and save as a PNG image.\n\n"
" -h display this message.\n"
" --help display the usage of long options.\n"
" -o FILENAME write PNG image to FILENAME. If '-' is specified, the result\n"
" will be output to standard output. If -S is given, structured\n"
" symbols are written to FILENAME-01.png, FILENAME-02.png, ...;\n"
" if specified, remove a trailing '.png' from FILENAME.\n"
" -s NUMBER specify the size of dot (pixel). (default=3)\n"
" -l {LMQH} specify error collectin level from L (lowest) to H (highest).\n"
" (default=L)\n"
" -v NUMBER specify the version of the symbol. (default=auto)\n"
" -m NUMBER specify the width of margin. (default=4)\n"
" -S make structured symbols. Version must be specified.\n"
" -k assume that the input text contains kanji (shift-jis).\n"
" -c encode lower-case alphabet characters in 8-bit mode. (default)\n"
" -i ignore case distinctions and use only upper-case characters.\n"
" -8 encode entire data in 8-bit mode. -k, -c and -i will be ignored.\n"
" -V display the version number and copyrights of the qrencode.\n"
" [STRING] input data. If it is not specified, data will be taken from\n"
" standard input.\n"
);
}
}
}
#define MAX_DATA_SIZE (7090 * 16) /* from the specification */
static char *readStdin(void)
{
char *buffer;
int ret;
buffer = (char *)malloc(MAX_DATA_SIZE);
if(buffer == NULL) {
fprintf(stderr, "Memory allocation failed.\n");
exit(EXIT_FAILURE);
}
ret = fread(buffer, 1, MAX_DATA_SIZE, stdin);
if(ret == 0) {
fprintf(stderr, "No input data.\n");
exit(EXIT_FAILURE);
}
if(feof(stdin) == 0) {
fprintf(stderr, "Input data is too large.\n");
exit(EXIT_FAILURE);
}
buffer[ret] = '\0';
return buffer;
}
static int writePNG(QRcode *qrcode, const char *outfile)
{
static FILE *fp; // avoid clobbering by setjmp.
png_structp png_ptr;
png_infop info_ptr;
unsigned char *row, *p, *q;
int x, y, xx, yy, bit;
int realwidth;
realwidth = (qrcode->width + margin * 2) * size;
row = (unsigned char *)malloc((realwidth + 7) / 8);
if(row == NULL) {
fprintf(stderr, "Failed to allocate memory.\n");
exit(EXIT_FAILURE);
}
if(outfile[0] == '-' && outfile[1] == '\0') {
fp = stdout;
} else {
fp = fopen(outfile, "wb");
if(fp == NULL) {
fprintf(stderr, "Failed to create file: %s\n", outfile);
perror(NULL);
exit(EXIT_FAILURE);
}
}
png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
if(png_ptr == NULL) {
fprintf(stderr, "Failed to initialize PNG writer.\n");
exit(EXIT_FAILURE);
}
info_ptr = png_create_info_struct(png_ptr);
if(info_ptr == NULL) {
fprintf(stderr, "Failed to initialize PNG write.\n");
exit(EXIT_FAILURE);
}
if(setjmp(png_jmpbuf(png_ptr))) {
png_destroy_write_struct(&png_ptr, &info_ptr);
fprintf(stderr, "Failed to write PNG image.\n");
exit(EXIT_FAILURE);
}
png_init_io(png_ptr, fp);
png_set_IHDR(png_ptr, info_ptr,
realwidth, realwidth,
1,
PNG_COLOR_TYPE_GRAY,
PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_DEFAULT,
PNG_FILTER_TYPE_DEFAULT);
png_write_info(png_ptr, info_ptr);
/* top margin */
memset(row, 0xff, (realwidth + 7) / 8);
for(y=0; y<margin * size; y++) {
png_write_row(png_ptr, row);
}
/* data */
p = qrcode->data;
for(y=0; y<qrcode->width; y++) {
bit = 7;
memset(row, 0xff, (realwidth + 7) / 8);
q = row;
q += margin * size / 8;
bit = 7 - (margin * size % 8);
for(x=0; x<qrcode->width; x++) {
for(xx=0; xx<size; xx++) {
*q ^= (*p & 1) << bit;
bit--;
if(bit < 0) {
q++;
bit = 7;
}
}
p++;
}
for(yy=0; yy<size; yy++) {
png_write_row(png_ptr, row);
}
}
/* bottom margin */
memset(row, 0xff, (realwidth + 7) / 8);
for(y=0; y<margin * size; y++) {
png_write_row(png_ptr, row);
}
png_write_end(png_ptr, info_ptr);
png_destroy_write_struct(&png_ptr, &info_ptr);
fclose(fp);
free(row);
return 0;
}
static QRcode *encode(const char *intext)
{
QRcode *code;
if(eightbit) {
code = QRcode_encodeString8bit(intext, version, level);
} else {
code = QRcode_encodeString(intext, version, level, hint, casesensitive);
}
return code;
}
static void qrencode(const char *intext, const char *outfile)
{
QRcode *qrcode;
qrcode = encode(intext);
if(qrcode == NULL) {
perror("Failed to encode the input data:");
exit(EXIT_FAILURE);
}
writePNG(qrcode, outfile);
QRcode_free(qrcode);
}
static QRcode_List *encodeStructured(const char *intext)
{
QRcode_List *list;
if(eightbit) {
list = QRcode_encodeString8bitStructured(intext, version, level);
} else {
list = QRcode_encodeStringStructured(intext, version, level, hint, casesensitive);
}
return list;
}
static void qrencodeStructured(const char *intext, const char *outfile)
{
QRcode_List *qrlist, *p;
char filename[FILENAME_MAX];
char *base, *q, *suffix = NULL;
int i = 1;
base = strdup(outfile);
if(base == NULL) {
fprintf(stderr, "Failed to allocate memory.\n");
exit(EXIT_FAILURE);
}
if(strlen(base) > 4) {
q = base + strlen(base) - 4;
if(strcasecmp(".png", q) == 0) {
suffix = strdup(q);
*q = '\0';
}
}
qrlist = encodeStructured(intext);
if(qrlist == NULL) {
perror("Failed to encode the input data:");
exit(EXIT_FAILURE);
}
for(p = qrlist; p != NULL; p = p->next) {
if(p->code == NULL) {
fprintf(stderr, "Failed to encode the input data.\n");
exit(EXIT_FAILURE);
}
if(suffix) {
snprintf(filename, FILENAME_MAX, "%s-%02d%s", base, i, suffix);
} else {
snprintf(filename, FILENAME_MAX, "%s-%02d", base, i);
}
writePNG(p->code, filename);
i++;
}
free(base);
if(suffix) {
free(suffix);
}
QRcode_List_free(qrlist);
}
int main(int argc, char **argv)
{
int opt, lindex = -1;
char *outfile = NULL;
char *intext = NULL;
while((opt = getopt_long(argc, argv, optstring, options, &lindex)) != -1) {
switch(opt) {
case 'h':
if(lindex == 0) {
usage(1, 1);
} else {
usage(1, 0);
}
exit(0);
break;
case 'o':
outfile = optarg;
break;
case 's':
size = atoi(optarg);
if(size <= 0) {
fprintf(stderr, "Invalid size: %d\n", size);
exit(EXIT_FAILURE);
}
break;
case 'v':
version = atoi(optarg);
if(version < 0) {
fprintf(stderr, "Invalid version: %d\n", version);
exit(EXIT_FAILURE);
}
break;
case 'l':
switch(*optarg) {
case 'l':
case 'L':
level = QR_ECLEVEL_L;
break;
case 'm':
case 'M':
level = QR_ECLEVEL_M;
break;
case 'q':
case 'Q':
level = QR_ECLEVEL_Q;
break;
case 'h':
case 'H':
level = QR_ECLEVEL_H;
break;
default:
fprintf(stderr, "Invalid level: %s\n", optarg);
exit(EXIT_FAILURE);
break;
}
break;
case 'm':
margin = atoi(optarg);
if(margin < 0) {
fprintf(stderr, "Invalid margin: %d\n", margin);
exit(EXIT_FAILURE);
}
break;
case 'S':
structured = 1;
case 'k':
hint = QR_MODE_KANJI;
break;
case 'c':
casesensitive = 1;
break;
case 'i':
casesensitive = 0;
break;
case '8':
eightbit = 1;
break;
case 'V':
usage(0, 0);
exit(0);
break;
default:
fprintf(stderr, "Try `qrencode --help' for more information.\n");
exit(EXIT_FAILURE);
break;
}
}
if(argc == 1) {
usage(1, 0);
exit(0);
}
if(outfile == NULL) {
fprintf(stderr, "No output filename is given.\n");
exit(EXIT_FAILURE);
}
if(optind < argc) {
intext = argv[optind];
}
if(intext == NULL) {
intext = readStdin();
}
if(structured) {
if(version == 0) {
fprintf(stderr, "Version must be specified to encode structured symbols.\n");
exit(EXIT_FAILURE);
}
qrencodeStructured(intext, outfile);
} else {
qrencode(intext, outfile);
}
return 0;
}
