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qrenc.c
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/**
* qrencode - QR Code encoder
*
* QR Code encoding tool
* Copyright (C) 2006-2017 Kentaro Fukuchi <[email protected]>
*
* 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
*/
#if HAVE_CONFIG_H
# include "config.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <getopt.h>
#include <errno.h>
#if HAVE_PNG
#include <png.h>
#endif
#include "qrencode.h"
#define INCHES_PER_METER (100.0/2.54)
static int casesensitive = 1;
static int eightbit = 0;
static int version = 0;
static int size = 3;
static int margin = -1;
static int dpi = 72;
static int structured = 0;
static int rle = 0;
static int svg_path = 0;
static int micro = 0;
static int inline_svg = 0;
static QRecLevel level = QR_ECLEVEL_L;
static QRencodeMode hint = QR_MODE_8;
static unsigned char fg_color[4] = {0, 0, 0, 255};
static unsigned char bg_color[4] = {255, 255, 255, 255};
static int verbose = 0;
enum imageType {
PNG_TYPE,
PNG32_TYPE,
EPS_TYPE,
SVG_TYPE,
XPM_TYPE,
ANSI_TYPE,
ANSI256_TYPE,
ASCII_TYPE,
ASCIIi_TYPE,
UTF8_TYPE,
ANSIUTF8_TYPE,
UTF8i_TYPE,
ANSIUTF8i_TYPE
};
static enum imageType image_type = PNG_TYPE;
static const struct option options[] = {
{"help" , no_argument , NULL, 'h'},
{"output" , required_argument, NULL, 'o'},
{"read-from" , required_argument, NULL, 'r'},
{"level" , required_argument, NULL, 'l'},
{"size" , required_argument, NULL, 's'},
{"symversion" , required_argument, NULL, 'v'},
{"margin" , required_argument, NULL, 'm'},
{"dpi" , required_argument, NULL, 'd'},
{"type" , required_argument, NULL, 't'},
{"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'},
{"rle" , no_argument , &rle, 1},
{"svg-path" , no_argument , &svg_path, 1},
{"inline" , no_argument , &inline_svg, 1},
{"micro" , no_argument , NULL, 'M'},
{"foreground" , required_argument, NULL, 'f'},
{"background" , required_argument, NULL, 'b'},
{"version" , no_argument , NULL, 'V'},
{"verbose" , no_argument , &verbose, 1},
{NULL, 0, NULL, 0}
};
static char *optstring = "ho:r:l:s:v:m:d:t:Skci8MV";
static void usage(int help, int longopt, int status)
{
FILE *out = status ? stderr : stdout;
fprintf(out,
"qrencode version %s\n"
"Copyright (C) 2006-2017 Kentaro Fukuchi\n", QRcode_APIVersionString());
if(help) {
if(longopt) {
fprintf(out,
"Usage: qrencode [OPTION]... [STRING]\n"
"Encode input data in a QR Code and save as a PNG or EPS 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 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"
" (suffix is removed from FILENAME, if specified)\n\n"
" -r FILENAME, --read-from=FILENAME\n"
" read input data from FILENAME.\n\n"
" -s NUMBER, --size=NUMBER\n"
" specify module size in dots (pixels). (default=3)\n\n"
" -l {LMQH}, --level={LMQH}\n"
" specify error correction level from L (lowest) to H (highest).\n"
" (default=L)\n\n"
" -v NUMBER, --symversion=NUMBER\n"
" specify the minimum version of the symbol. See SYMBOL VERSIONS\n"
" for more information. (default=auto)\n\n"
" -m NUMBER, --margin=NUMBER\n"
" specify the width of the margins. (default=4 (2 for Micro QR)))\n\n"
" -d NUMBER, --dpi=NUMBER\n"
" specify the DPI of the generated PNG. (default=72)\n\n"
" -t {PNG,PNG32,EPS,SVG,XPM,ANSI,ANSI256,ASCII,ASCIIi,UTF8,ANSIUTF8},\n"
" --type={PNG,PNG32,EPS,SVG,XPM,ANSI,ANSI256,ASCII,ASCIIi,UTF8,ANSIUTF8}\n"
" specify the type of the generated image. (default=PNG)\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"
" --rle enable run-length encoding for SVG.\n\n"
" --svg-path\n"
" use single path to draw modules for SVG.\n\n"
" --inline only useful for SVG output, generates an SVG without the XML tag.\n"
" -M, --micro encode in a Micro QR Code. (experimental)\n\n"
" --foreground=RRGGBB[AA]\n"
" --background=RRGGBB[AA]\n"
" specify foreground/background color in hexadecimal notation.\n"
" 6-digit (RGB) or 8-digit (RGBA) form are supported.\n"
" Color output support available only in PNG, EPS and SVG.\n\n"
" -V, --version\n"
" display the version number and copyrights of the qrencode.\n\n"
" --verbose\n"
" display verbose information to stderr.\n\n"
" [STRING] input data. If it is not specified, data will be taken from\n"
" standard input.\n\n"
"SYMBOL VERSIONS\n"
" The symbol versions of QR Code range from Version 1 to Version\n"
" 40. Each version has a different module configuration or number\n"
" of modules, ranging from Version 1 (21 x 21 modules) up to\n"
" Version 40 (177 x 177 modules). Each higher version number\n"
" comprises 4 additional modules per side by default. See\n"
" http://www.qrcode.com/en/about/version.html for a detailed\n"
" version list.\n"
);
} else {
fprintf(out,
"Usage: qrencode [OPTION]... [STRING]\n"
"Encode input data in a QR Code and save as a PNG or EPS image.\n\n"
" -h display this message.\n"
" --help display the usage of long options.\n"
" -o FILENAME write 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"
" (suffix is removed from FILENAME, if specified)\n"
" -r FILENAME read input data from FILENAME.\n"
" -s NUMBER specify module size in dots (pixels). (default=3)\n"
" -l {LMQH} specify error correction level from L (lowest) to H (highest).\n"
" (default=L)\n"
" -v NUMBER specify the minimum version of the symbol. (default=auto)\n"
" -m NUMBER specify the width of the margins. (default=4 (2 for Micro))\n"
" -d NUMBER specify the DPI of the generated PNG. (default=72)\n"
" -t {PNG,PNG32,EPS,SVG,XPM,ANSI,ANSI256,ASCII,ASCIIi,UTF8,ANSIUTF8}\n"
" specify the type of the generated image. (default=PNG)\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"
" -M encode in a Micro QR Code.\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\n"
" Try \"qrencode --help\" for more options.\n"
);
}
}
}
static int color_set(unsigned char color[4], const char *value)
{
int len = strlen(value);
int i, count;
unsigned int col[4];
if(len == 6) {
count = sscanf(value, "%02x%02x%02x%n", &col[0], &col[1], &col[2], &len);
if(count < 3 || len != 6) {
return -1;
}
for(i = 0; i < 3; i++) {
color[i] = col[i];
}
color[3] = 255;
} else if(len == 8) {
count = sscanf(value, "%02x%02x%02x%02x%n", &col[0], &col[1], &col[2], &col[3], &len);
if(count < 4 || len != 8) {
return -1;
}
for(i = 0; i < 4; i++) {
color[i] = col[i];
}
} else {
return -1;
}
return 0;
}
#define MAX_DATA_SIZE (7090 * 2) /* timed by the safty factor 2 */
static unsigned char data_buffer[MAX_DATA_SIZE];
static unsigned char *readFile(FILE *fp, int *length)
{
int ret;
ret = fread(data_buffer, 1, MAX_DATA_SIZE, fp);
if(ret == 0) {
fprintf(stderr, "No input data.\n");
exit(EXIT_FAILURE);
}
if(feof(fp) == 0) {
fprintf(stderr, "Input data is too large.\n");
exit(EXIT_FAILURE);
}
data_buffer[ret] = '\0';
*length = ret;
return data_buffer;
}
static FILE *openFile(const char *outfile)
{
FILE *fp;
if(outfile == NULL || (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);
}
}
return fp;
}
#if HAVE_PNG
static void fillRow(unsigned char *row, int num, const unsigned char color[])
{
int i;
for(i = 0; i < num; i++) {
memcpy(row, color, 4);
row += 4;
}
}
#endif
static int writePNG(const QRcode *qrcode, const char *outfile, enum imageType type)
{
#if HAVE_PNG
static FILE *fp; // avoid clobbering by setjmp.
png_structp png_ptr;
png_infop info_ptr;
png_colorp palette = NULL;
png_byte alpha_values[2];
unsigned char *row, *p, *q;
int x, y, xx, yy, bit;
int realwidth;
realwidth = (qrcode->width + margin * 2) * size;
if(type == PNG_TYPE) {
row = (unsigned char *)malloc((size_t)((realwidth + 7) / 8));
} else if(type == PNG32_TYPE) {
row = (unsigned char *)malloc((size_t)realwidth * 4);
} else {
fprintf(stderr, "Internal error.\n");
exit(EXIT_FAILURE);
}
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);
}
if(type == PNG_TYPE) {
palette = (png_colorp) malloc(sizeof(png_color) * 2);
if(palette == NULL) {
fprintf(stderr, "Failed to allocate memory.\n");
exit(EXIT_FAILURE);
}
palette[0].red = fg_color[0];
palette[0].green = fg_color[1];
palette[0].blue = fg_color[2];
palette[1].red = bg_color[0];
palette[1].green = bg_color[1];
palette[1].blue = bg_color[2];
alpha_values[0] = fg_color[3];
alpha_values[1] = bg_color[3];
png_set_PLTE(png_ptr, info_ptr, palette, 2);
png_set_tRNS(png_ptr, info_ptr, alpha_values, 2, NULL);
}
png_init_io(png_ptr, fp);
if(type == PNG_TYPE) {
png_set_IHDR(png_ptr, info_ptr,
(unsigned int)realwidth, (unsigned int)realwidth,
1,
PNG_COLOR_TYPE_PALETTE,
PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_DEFAULT,
PNG_FILTER_TYPE_DEFAULT);
} else {
png_set_IHDR(png_ptr, info_ptr,
(unsigned int)realwidth, (unsigned int)realwidth,
8,
PNG_COLOR_TYPE_RGB_ALPHA,
PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_DEFAULT,
PNG_FILTER_TYPE_DEFAULT);
}
png_set_pHYs(png_ptr, info_ptr,
dpi * INCHES_PER_METER,
dpi * INCHES_PER_METER,
PNG_RESOLUTION_METER);
png_write_info(png_ptr, info_ptr);
if(type == PNG_TYPE) {
/* top margin */
memset(row, 0xff, (size_t)((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++) {
memset(row, 0xff, (size_t)((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, (size_t)((realwidth + 7) / 8));
for(y = 0; y < margin * size; y++) {
png_write_row(png_ptr, row);
}
} else {
/* top margin */
fillRow(row, realwidth, bg_color);
for(y = 0; y < margin * size; y++) {
png_write_row(png_ptr, row);
}
/* data */
p = qrcode->data;
for(y = 0; y < qrcode->width; y++) {
fillRow(row, realwidth, bg_color);
for(x = 0; x < qrcode->width; x++) {
for(xx = 0; xx < size; xx++) {
if(*p & 1) {
memcpy(&row[((margin + x) * size + xx) * 4], fg_color, 4);
}
}
p++;
}
for(yy = 0; yy < size; yy++) {
png_write_row(png_ptr, row);
}
}
/* bottom margin */
fillRow(row, realwidth, bg_color);
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);
free(palette);
return 0;
#else
fputs("PNG output is disabled at compile time. No output generated.\n", stderr);
return 0;
#endif
}
static int writeEPS(const QRcode *qrcode, const char *outfile)
{
FILE *fp;
unsigned char *row, *p;
int x, y, yy;
int realwidth;
fp = openFile(outfile);
realwidth = (qrcode->width + margin * 2) * size;
/* EPS file header */
fprintf(fp, "%%!PS-Adobe-2.0 EPSF-1.2\n"
"%%%%BoundingBox: 0 0 %d %d\n"
"%%%%Pages: 1 1\n"
"%%%%EndComments\n", realwidth, realwidth);
/* draw point */
fprintf(fp, "/p { "
"moveto "
"0 1 rlineto "
"1 0 rlineto "
"0 -1 rlineto "
"fill "
"} bind def\n");
/* set color */
fprintf(fp, "gsave\n");
fprintf(fp, "%f %f %f setrgbcolor\n",
(float)bg_color[0] / 255,
(float)bg_color[1] / 255,
(float)bg_color[2] / 255);
fprintf(fp, "%d %d scale\n", realwidth, realwidth);
fprintf(fp, "0 0 p\ngrestore\n");
fprintf(fp, "%f %f %f setrgbcolor\n",
(float)fg_color[0] / 255,
(float)fg_color[1] / 255,
(float)fg_color[2] / 255);
fprintf(fp, "%d %d scale\n", size, size);
/* data */
p = qrcode->data;
for(y = 0; y < qrcode->width; y++) {
row = (p+(y*qrcode->width));
yy = (margin + qrcode->width - y - 1);
for(x = 0; x < qrcode->width; x++) {
if(*(row+x)&0x1) {
fprintf(fp, "%d %d p ", margin + x, yy);
}
}
}
fprintf(fp, "\n%%%%EOF\n");
fclose(fp);
return 0;
}
static void writeSVG_drawModules(FILE *fp, int x, int y, int width, const char* col, float opacity)
{
if(svg_path) {
fprintf(fp, "M%d,%dh%d", x, y, width);
} else {
if(fg_color[3] != 255) {
fprintf(fp, "\t\t\t<rect x=\"%d\" y=\"%d\" width=\"%d\" height=\"1\" "\
"fill=\"#%s\" fill-opacity=\"%f\"/>\n",
x, y, width, col, opacity );
} else {
fprintf(fp, "\t\t\t<rect x=\"%d\" y=\"%d\" width=\"%d\" height=\"1\" "\
"fill=\"#%s\"/>\n",
x, y, width, col );
}
}
}
static int writeSVG(const QRcode *qrcode, const char *outfile)
{
FILE *fp;
unsigned char *row, *p;
int x, y, x0, pen;
int symwidth, realwidth;
float scale;
char fg[7], bg[7];
float fg_opacity;
float bg_opacity;
fp = openFile(outfile);
scale = dpi * INCHES_PER_METER / 100.0;
symwidth = qrcode->width + margin * 2;
realwidth = symwidth * size;
snprintf(fg, 7, "%02x%02x%02x", fg_color[0], fg_color[1], fg_color[2]);
snprintf(bg, 7, "%02x%02x%02x", bg_color[0], bg_color[1], bg_color[2]);
fg_opacity = (float)fg_color[3] / 255;
bg_opacity = (float)bg_color[3] / 255;
/* XML declaration */
if (!inline_svg)
fputs( "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?>\n", fp );
/* DTD
No document type specified because "while a DTD is provided in [the SVG]
specification, the use of DTDs for validating XML documents is known to
be problematic. In particular, DTDs do not handle namespaces gracefully.
It is *not* recommended that a DOCTYPE declaration be included in SVG
documents."
http://www.w3.org/TR/2003/REC-SVG11-20030114/intro.html#Namespace
*/
/* Vanity remark */
fprintf(fp, "<!-- Created with qrencode %s (https://fukuchi.org/works/qrencode/index.html) -->\n", QRcode_APIVersionString());
/* SVG code start */
fprintf(fp,
"<svg width=\"%.2fcm\" height=\"%.2fcm\" viewBox=\"0 0 %d %d\""\
" preserveAspectRatio=\"none\" version=\"1.1\""\
" xmlns=\"http://www.w3.org/2000/svg\">\n",
realwidth / scale, realwidth / scale, symwidth, symwidth
);
/* Make named group */
fputs("\t<g id=\"QRcode\">\n", fp);
/* Make solid background */
if(bg_color[3] != 255) {
fprintf(fp, "\t\t<rect x=\"0\" y=\"0\" width=\"%d\" height=\"%d\" fill=\"#%s\" fill-opacity=\"%f\"/>\n", symwidth, symwidth, bg, bg_opacity);
} else {
fprintf(fp, "\t\t<rect x=\"0\" y=\"0\" width=\"%d\" height=\"%d\" fill=\"#%s\"/>\n", symwidth, symwidth, bg);
}
if(svg_path) {
if(fg_color[3] != 255) {
fprintf(fp, "\t\t<path style=\"stroke:#%s;stroke-opacity:%f\" transform=\"translate(%d,%d.5)\" d=\"", fg, fg_opacity, margin, margin);
} else {
fprintf(fp, "\t\t<path style=\"stroke:#%s\" transform=\"translate(%d,%d.5)\" d=\"", fg, margin, margin);
}
} else {
/* Create new viewbox for QR data */
fprintf(fp, "\t\t<g id=\"Pattern\" transform=\"translate(%d,%d)\">\n", margin, margin);
}
/* Write data */
p = qrcode->data;
for(y = 0; y < qrcode->width; y++) {
row = (p+(y*qrcode->width));
if( !rle ) {
/* no RLE */
for(x = 0; x < qrcode->width; x++) {
if(*(row+x)&0x1) {
writeSVG_drawModules(fp, x, y, 1, fg, fg_opacity);
}
}
} else {
/* simple RLE */
pen = 0;
x0 = 0;
for(x = 0; x < qrcode->width; x++) {
if( !pen ) {
pen = *(row+x)&0x1;
x0 = x;
} else if(!(*(row+x)&0x1)) {
writeSVG_drawModules(fp, x0, y, x-x0, fg, fg_opacity);
pen = 0;
}
}
if( pen ) {
writeSVG_drawModules(fp, x0, y, qrcode->width - x0, fg, fg_opacity);
}
}
}
if(svg_path) {
fputs("\"/>\n", fp);
} else {
/* Close QR data viewbox */
fputs("\t\t</g>\n", fp);
}
/* Close group */
fputs("\t</g>\n", fp);
/* Close SVG code */
fputs("</svg>\n", fp);
fclose(fp);
return 0;
}
static int writeXPM(const QRcode *qrcode, const char *outfile)
{
FILE *fp;
int x, xx, y, yy, realwidth, realmargin;
char *row;
char fg[7], bg[7];
unsigned char *p;
fp = openFile(outfile);
realwidth = (qrcode->width + margin * 2) * size;
realmargin = margin * size;
row = malloc((size_t)realwidth + 1);
if (!row ) {
fprintf(stderr, "Failed to allocate memory.\n");
exit(EXIT_FAILURE);
}
snprintf(fg, 7, "%02x%02x%02x", fg_color[0], fg_color[1], fg_color[2]);
snprintf(bg, 7, "%02x%02x%02x", bg_color[0], bg_color[1], bg_color[2]);
fputs("/* XPM */\n", fp);
fputs("static const char *const qrcode_xpm[] = {\n", fp);
fputs("/* width height ncolors chars_per_pixel */\n", fp);
fprintf(fp, "\"%d %d 2 1\",\n", realwidth, realwidth);
fputs("/* colors */\n", fp);
fprintf(fp, "\"F c #%s\",\n", fg);
fprintf(fp, "\"B c #%s\",\n", bg);
fputs("/* pixels */\n", fp);
memset(row, 'B', (size_t)realwidth);
row[realwidth] = '\0';
for (y = 0; y < realmargin; y++) {
fprintf(fp, "\"%s\",\n", row);
}
p = qrcode->data;
for (y = 0; y < qrcode->width; y++) {
for (yy = 0; yy < size; yy++) {
fputs("\"", fp);
for (x = 0; x < margin; x++) {
for (xx = 0; xx < size; xx++) {
fputs("B", fp);
}
}
for (x = 0; x < qrcode->width; x++) {
for (xx = 0; xx < size; xx++) {
if (p[(y * qrcode->width) + x] & 0x1) {
fputs("F", fp);
} else {
fputs("B", fp);
}
}
}
for (x = 0; x < margin; x++) {
for (xx = 0; xx < size; xx++) {
fputs("B", fp);
}
}
fputs("\",\n", fp);
}
}
for (y = 0; y < realmargin; y++) {
fprintf(fp, "\"%s\"%s\n", row, y < (size - 1) ? "," : "};");
}
free(row);
fclose(fp);
return 0;
}
static void writeANSI_margin(FILE* fp, int realwidth,
char* buffer, const char* white, int white_s )
{
int y;
strncpy(buffer, white, (size_t)white_s);
memset(buffer + white_s, ' ', (size_t)realwidth * 2);
strcpy(buffer + white_s + realwidth * 2, "\033[0m\n"); // reset to default colors
for(y = 0; y < margin; y++ ){
fputs(buffer, fp);
}
}
static int writeANSI(const QRcode *qrcode, const char *outfile)
{
FILE *fp;
unsigned char *row, *p;
int x, y;
int realwidth;
int last;
const char *white, *black;
char *buffer;
int white_s, black_s, buffer_s;
if(image_type == ANSI256_TYPE){
/* codes for 256 color compatible terminals */
white = "\033[48;5;231m";
white_s = 11;
black = "\033[48;5;16m";
black_s = 10;
} else {
white = "\033[47m";
white_s = 5;
black = "\033[40m";
black_s = 5;
}
size = 1;
fp = openFile(outfile);
realwidth = (qrcode->width + margin * 2) * size;
buffer_s = (realwidth * white_s) * 2;
buffer = (char *)malloc((size_t)buffer_s);
if(buffer == NULL) {
fprintf(stderr, "Failed to allocate memory.\n");
exit(EXIT_FAILURE);
}
/* top margin */
writeANSI_margin(fp, realwidth, buffer, white, white_s);
/* data */
p = qrcode->data;
for(y = 0; y < qrcode->width; y++) {
row = (p+(y*qrcode->width));
memset(buffer, 0, (size_t)buffer_s);
strncpy(buffer, white, (size_t)white_s);
for(x = 0; x < margin; x++ ){
strncat(buffer, " ", 2);
}
last = 0;
for(x = 0; x < qrcode->width; x++) {
if(*(row+x)&0x1) {
if( last != 1 ){
strncat(buffer, black, (size_t)black_s);
last = 1;
}
} else if( last != 0 ){
strncat(buffer, white, (size_t)white_s);
last = 0;
}
strncat(buffer, " ", 2);
}
if( last != 0 ){
strncat(buffer, white, (size_t)white_s);
}
for(x = 0; x < margin; x++ ){
strncat(buffer, " ", 2);
}
strncat(buffer, "\033[0m\n", 5);
fputs(buffer, fp);
}
/* bottom margin */
writeANSI_margin(fp, realwidth, buffer, white, white_s);
fclose(fp);
free(buffer);
return 0;
}
static void writeUTF8_margin(FILE* fp, int realwidth, const char* white,
const char *reset, const char* full)
{
int x, y;
for (y = 0; y < margin/2; y++) {
fputs(white, fp);
for (x = 0; x < realwidth; x++)
fputs(full, fp);
fputs(reset, fp);
fputc('\n', fp);
}
}
static int writeUTF8(const QRcode *qrcode, const char *outfile, int use_ansi, int invert)
{
FILE *fp;
int x, y;
int realwidth;
const char *white, *reset;
const char *empty, *lowhalf, *uphalf, *full;
empty = " ";
lowhalf = "\342\226\204";
uphalf = "\342\226\200";
full = "\342\226\210";
if (invert) {
const char *tmp;
tmp = empty;
empty = full;
full = tmp;
tmp = lowhalf;
lowhalf = uphalf;
uphalf = tmp;
}
if (use_ansi){
white = "\033[40;37;1m";
reset = "\033[0m";
} else {
white = "";
reset = "";
}
fp = openFile(outfile);
realwidth = (qrcode->width + margin * 2);
/* top margin */
writeUTF8_margin(fp, realwidth, white, reset, full);
/* data */
for(y = 0; y < qrcode->width; y += 2) {
unsigned char *row1, *row2;
row1 = qrcode->data + y*qrcode->width;
row2 = row1 + qrcode->width;
fputs(white, fp);
for (x = 0; x < margin; x++) {
fputs(full, fp);
}
for (x = 0; x < qrcode->width; x++) {
if(row1[x] & 1) {
if(y < qrcode->width - 1 && row2[x] & 1) {
fputs(empty, fp);
} else {
fputs(lowhalf, fp);
}
} else if(y < qrcode->width - 1 && row2[x] & 1) {
fputs(uphalf, fp);
} else {
fputs(full, fp);
}
}
for (x = 0; x < margin; x++)
fputs(full, fp);
fputs(reset, fp);
fputc('\n', fp);
}
/* bottom margin */
writeUTF8_margin(fp, realwidth, white, reset, full);
fclose(fp);
return 0;
}
static void writeASCII_margin(FILE* fp, int realwidth, char* buffer, int invert)
{
int y, h;
h = margin;
memset(buffer, (invert?'#':' '), (size_t)realwidth);
buffer[realwidth] = '\n';
buffer[realwidth + 1] = '\0';
for(y = 0; y < h; y++ ){
fputs(buffer, fp);
}
}
static int writeASCII(const QRcode *qrcode, const char *outfile, int invert)
{
FILE *fp;
unsigned char *row;
int x, y;
int realwidth;
char *buffer, *p;
int buffer_s;
char black = '#';
char white = ' ';
if(invert) {
black = ' ';
white = '#';
}
size = 1;
fp = openFile(outfile);
realwidth = (qrcode->width + margin * 2) * 2;
buffer_s = realwidth + 2;
buffer = (char *)malloc((size_t)buffer_s);
if(buffer == NULL) {
fprintf(stderr, "Failed to allocate memory.\n");
exit(EXIT_FAILURE);
}
/* top margin */
writeASCII_margin(fp, realwidth, buffer, invert);
/* data */
for(y = 0; y < qrcode->width; y++) {
row = qrcode->data+(y*qrcode->width);
p = buffer;
memset(p, white, (size_t)margin * 2);
p += margin * 2;
for(x = 0; x < qrcode->width; x++) {
if(row[x]&0x1) {
*p++ = black;
*p++ = black;
} else {
*p++ = white;
*p++ = white;
}
}
memset(p, white, (size_t)margin * 2);
p += margin * 2;
*p++ = '\n';
*p++ = '\0';
fputs( buffer, fp );
}
/* bottom margin */
writeASCII_margin(fp, realwidth, buffer, invert);
fclose(fp);
free(buffer);
return 0;
}
static QRcode *encode(const unsigned char *intext, int length)