#ifdef HAVE_CONFIG_H

#include "config.h"

#endif

#include <stdio.h>

#include <stdlib.h>

#ifndef _WIN32

#include <unistd.h> /* For unlink function */

#endif

#include "gd.h"

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

	your convenience in creating images on the fly from a

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

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

void CompareImages(char *msg, gdImagePtr im1, gdImagePtr im2);

int main(int argc, char **argv)

{

	gdImagePtr im1, im2;

	FILE *in;

	if (argc != 3) {

		fprintf(stderr, "Usage: gdcmpgif filename.gif filename.gif\n");

		exit(1);

	}

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

	if (!in) {

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

		exit(1);

	}

	im1 = gdImageCreateFromGif(in);

	fclose(in);

	if (!im1) {

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

		exit(1);

	}

	in = fopen(argv[2], "rb");

	if (!in) {

		fprintf(stderr, "Input file 2 does not exist!\n");

		exit(1);

	}

	im2 = gdImageCreateFromGif(in);

	fclose(in);

	if (!im2) {

		fprintf(stderr, "Input 2 is not in GIF format!\n");

		exit(1);

	}

	CompareImages("gdcmpgif", im1, im2);

	gdImageDestroy(im1);

	gdImageDestroy(im2);

	return 0;

}

void CompareImages(char *msg, gdImagePtr im1, gdImagePtr im2)

{

	int cmpRes;

	cmpRes = gdImageCompare(im1, im2);

	if (cmpRes & GD_CMP_IMAGE) {

		printf("%%%s: ERROR images differ: BAD\n",msg);

	} else if (cmpRes != 0) {

		printf("%%%s: WARNING images differ: WARNING - Probably OK\n",msg);

	} else {

		printf("%%%s: OK\n",msg);

		return;

	}

	if (cmpRes & (GD_CMP_SIZE_X + GD_CMP_SIZE_Y)) {

		printf("-%s: INFO image sizes differ\n",msg);

	}

	if (cmpRes & GD_CMP_NUM_COLORS) {

		printf("-%s: INFO number of palette entries differ %d Vs. %d\n",msg,

		       im1->colorsTotal, im2->colorsTotal);

	}

	if (cmpRes & GD_CMP_COLOR) {

		printf("-%s: INFO actual colours of pixels differ\n",msg);

	}

}