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Diffstat (limited to 'genqrcode/tests/create_frame_pattern.c')
| -rw-r--r-- | genqrcode/tests/create_frame_pattern.c | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/genqrcode/tests/create_frame_pattern.c b/genqrcode/tests/create_frame_pattern.c new file mode 100644 index 0000000000..786309fe52 --- /dev/null +++ b/genqrcode/tests/create_frame_pattern.c @@ -0,0 +1,170 @@ +/* + * 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; +} |