ppm.c

#include "ppm.h"

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int ppm_image_init(struct ppm_image *im, int w, int h)
{
	memset(im, 0, sizeof(struct ppm_image));

	im->width = w;
	im->height = h;

	im->px = malloc(w * h * sizeof(struct ppm_pixel));

	if (!im->px) {
		perror("malloc");
		return 1;
	}

	return 0;
}

int ppm_image_release(struct ppm_image *im)
{
	if (im == NULL)
		return 1;

	free(im->px);
	im->px = NULL;

	im->width = 0;
	im->height = 0;

	return 0;
}

int ppm_image_dump(struct ppm_image *im, char *path)
{
	FILE *out = fopen(path, "w");

	if (!out) {
		perror("fopen");
		return 1;
	}

	fprintf(out, "P6\n");
	fprintf(out, "%d\n", im->width);
	fprintf(out, "%d\n", im->height);
	fprintf(out, "255\n");
	fwrite(im->px, sizeof(struct ppm_pixel), im->width * im->height, out);

	fclose(out);

	return 0;
}