#include <stdio.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include "sod.h"

#define MAX_IMG_SZ 1024*1024

int main()
{
    unsigned char *zInpbuf = NULL;

    zInpbuf = malloc(MAX_IMG_SZ);
    if (!zInpbuf)
    {
        perror("malloc");
        return -1;
    }

    ssize_t imgSz = read(0, zInpbuf, MAX_IMG_SZ);
    if (imgSz <= 0)
    {
        perror("read");
        free(zInpbuf);
        return -1;
    }

	sod_img imgIn = sod_img_load_from_mem(zInpbuf, imgSz, SOD_IMG_COLOR /* full color channels */);
	if (imgIn.data == 0) {
		/* Invalid path, unsupported format, memory failure, etc. */
		//puts("Cannot load input image..exiting");
		printf("Error loading input\n");
		free(zInpbuf);
		return -1;
	}

   for (int i = 0; i < imgIn.w * imgIn.h * imgIn.c; i++)
    {
        imgIn.data[i] = 255.0f - imgIn.data[i];
    }
    sod_img_save_as_png(imgIn, NULL);
    sod_free_image(imgIn);
    free(zInpbuf);
    return 0;
}