/*
* This tool creates a frame pattern data for debug purpose used by
* test_qrspec. test_qrspec and create_frame_pattern uses the same function
* of libqrencode. This means the test is meaningless if test_qrspec is run
* with a pattern data created by create_frame_pattern of the same version.
* In order to test it correctly, create a pattern data by the tool of the
* previous version, or use the frame data attached to the package.
*/
#include <stdio.h>
#include <string.h>
#include <png.h>
#include "common.h"
#include "../qrspec.h"
void append_pattern(int version, FILE *fp)
{
int width;
unsigned char *frame;
frame = QRspec_newFrame(version);
width = QRspec_getWidth(version);
fwrite(frame, 1, width * width, fp);
free(frame);
}
static int writePNG(unsigned char *frame, int width, const char *outfile)
{
static FILE *fp;
png_structp png_ptr;
png_infop info_ptr;
unsigned char *row, *p, *q;
int x, y, xx, yy, bit;
int realwidth;
const int margin = 0;
const int size = 1;
realwidth = (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) {
fclose(fp);
fprintf(stderr, "Failed to initialize PNG writer.\n");
exit(EXIT_FAILURE);
}
info_ptr = png_create_info_struct(png_ptr);
if(info_ptr == NULL) {
fclose(fp);
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);
fclose(fp);
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 = frame;
for(y=0; y<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<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;
}
void write_pattern_image(int version, const char *filename)
{
int width;
unsigned char *frame;
static char str[256];
frame = QRspec_newFrame(version);
width = QRspec_getWidth(version);
snprintf(str, 256, "%s-%d.png", filename, version);
writePNG(frame, width, str);
free(frame);
}
void write_pattern(const char *filename)
{
FILE *fp;
int i;
fp = fopen(filename, "wb");
if(fp == NULL) {
perror("Failed to open a file to write:");
abort();
}
for(i=1; i<=QRSPEC_VERSION_MAX; i++) {
append_pattern(i, fp);
write_pattern_image(i, filename);
}
fclose(fp);
}
int main(int argc, char **argv)
{
if(argc < 2) {
printf("Create empty frame patterns.\nUsage: %s FILENAME\n", argv[0]);
exit(0);
}
write_pattern(argv[1]);
return 0;
}
