Source

gd-libgd / src / gd2copypal.c

Full commit
#include <stdio.h>
#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. */

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;
}