#ifdef HAVE_CONFIG_H

#include "config.h"

#endif

#include <stdio.h>

#include <stdlib.h>

#include "gd.h"

/* A short program which converts a .png file into a .gd2 file, for

   your convenience in creating images on the fly from a

   basis image that must be loaded quickly. The .gd2 format

   is not intended to be a general-purpose format. */

int

main (int argc, char **argv)

{

	gdImagePtr im;

	FILE *in, *out;

	int cs, fmt;

	if (argc != 5) {

		fprintf(stderr, "Usage: pngtogd2 filename.png filename.gd2 cs fmt\n");

		fprintf(stderr, "       where cs is the chunk size\n");

		fprintf(stderr, "       fmt is 1 for raw, 2 for compressed\n");

		exit (1);

	}

	in = fopen (argv[1], "rb");

	if (!in) {

		fprintf(stderr, "Input file does not exist!\n");

		exit (1);

	}

#ifdef HAVE_LIBPNG

	im = gdImageCreateFromPng (in);

#else

	im = NULL;

	fprintf(stderr, "No PNG library support available.\n");

#endif

	fclose (in);

	if (!im) {

		fprintf(stderr, "Input is not in PNG format!\n");

		exit (1);

	}

	out = fopen (argv[2], "wb");

	if (!out) {

		fprintf(stderr, "Output file cannot be written to!\n");

		gdImageDestroy (im);

		exit (1);

	}

	cs = atoi (argv[3]);

	fmt = atoi (argv[4]);

	gdImageGd2 (im, out, cs, fmt);

	fclose (out);

	gdImageDestroy (im);

	return 0;

}