#include <stdio.h>
#include <stdlib.h> /* For atoi */
#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;
FILE *in, *out;
int x, y, w, h;
if (argc != 7)
{
fprintf (stderr, "Usage: gdparttopng filename.gd filename.png x y w h\n");
exit (1);
}
in = fopen (argv[1], "rb");
if (!in)
{
fprintf (stderr, "Input file does not exist!\n");
exit (1);
}
x = atoi (argv[3]);
y = atoi (argv[4]);
w = atoi (argv[5]);
h = atoi (argv[6]);
printf ("Extracting from (%d, %d), size is %dx%d\n", x, y, w, h);
im = gdImageCreateFromGd2Part (in, x, y, w, h);
fclose (in);
if (!im)
{
fprintf (stderr, "Input is not in GD2 format!\n");
exit (1);
}
out = fopen (argv[2], "wb");
if (!out)
{
fprintf (stderr, "Output file cannot be written to!\n");
gdImageDestroy (im);
exit (1);
}
#ifdef HAVE_LIBPNG
gdImagePng (im, out);
#else
fprintf(stderr, "No PNG library support.\n");
#endif
fclose (out);
gdImageDestroy (im);
return 0;
}
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