
#include "gd.h"
#include <stdio.h>
#include <stdlib.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. */

int main(int argc, char **argv)
{
    gdImagePtr im;
    gdImagePtr pal;
    FILE *in, *out;
    if (argc != 3) {
        fprintf(stderr, "Usage: gd2copypal palettefile.gd2 filename.gd2\n");
        exit(1);
    }
    in = fopen(argv[1], "rb");
    if (!in) {
        fprintf(stderr, "Palette file does not exist!\n");
        exit(1);
    }
    pal = gdImageCreateFromGd2(in);
    fclose(in);
    if (!pal) {
        fprintf(stderr, "Palette is not in GD2 format!\n");
        exit(1);
    }

    in = fopen(argv[2], "rb");
    if (!in) {
        fprintf(stderr, "Input file does not exist!\n");
        exit(1);
    }
    im = gdImageCreateFromGd2(in);
    fclose(in);
    if (!im) {
        fprintf(stderr, "Input is not in GD2 format!\n");
        exit(1);
    }

    gdImagePaletteCopy(im, pal);

    out = fopen(argv[2], "wb");
    if (!out) {
        fprintf(stderr, "Output file cannot be written to!\n");
        gdImageDestroy(im);
        exit(1);
    }
    gdImageGd2(im, out, 128, 2);
    fclose(out);
    gdImageDestroy(pal);
    gdImageDestroy(im);

    return 0;
}
