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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <FreeImage.h>
#include "pixelsort.h"
void printhelp(char *executable) {
printf("usage: %s [options] input\n", executable);
printf("\n");
printf("options:\n");
printf(" -h this help message.\n");
printf(" -u threshold upper limit (default: 204).\n");
printf(" -l threshold lower limit (default: 63).\n");
printf(" -d order of sorting directions (default \"hv\").\n");
}
char *parseargs(int argc, char **argv, context_t *ctx) {
int opt;
while((opt = getopt(argc, argv, "hd:u:l:")) != -1) {
switch (opt) {
case 'u':
ctx->upper = strtol(optarg, NULL, 10);
break;
case 'l':
ctx->lower = strtol(optarg, NULL, 10);
break;
case 'd':
ctx->dirs = optarg;
break;
case 'h':
printhelp(argv[0]);
exit(0);
break;
case '?':
printhelp(argv[0]);
exit(1);
break;
}
}
if (argc - optind < 1) {
fprintf(stderr, "Input image not supplied");
exit(1);
}
return argv[optind];
}
FIBITMAP *load_image(char *name) {
FREE_IMAGE_FORMAT imgformat = FreeImage_GetFileType(name, 0);
if (imgformat == FIF_UNKNOWN) {
fprintf(stderr, "Could not determine image format\n");
return NULL;
}
FIBITMAP *temp = FreeImage_Load(imgformat, name, 0);
if (!temp) {
fprintf(stderr, "Error loading image\n");
return NULL;
}
FIBITMAP *image = FreeImage_ConvertTo24Bits(temp);
if (!temp) {
fprintf(stderr, "Error converting image to 24 bits\n");
return NULL;
}
FreeImage_Unload(temp);
return image;
}
int main(int argc, char **argv) {
context_t ctx = {
.upper = 204,
.lower = 63,
.dirs = "hv",
.check_color = checkThreshold
};
char *imgname = parseargs(argc, argv, &ctx);
printf("Starting\n");
FreeImage_Initialise(1);
FIBITMAP *img = load_image(imgname);
if (!img) {
fprintf(stderr, "Error loading image %s\n", imgname);
return 1;
}
int ret = pixelsort(&ctx, img);
if (ret) {
exit(1);
}
if (!FreeImage_Save(FIF_PNG, img, "out.png", 0)) {
fprintf(stderr, "Error saving to out.png\n");
return 1;
}
FreeImage_DeInitialise();
}
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