#include "image.h"
#include <bio.h>

void
usage(void)
{
	fprint(2, "usage: %s\n", argv0);
	exits("usage");
}

void
main(int argc, char **argv)
{
	ImgHdr h;
	uchar buf[8192];
	int n, m, o;
	Biobuf b;

	ARGBEGIN {
	default:
		usage();
	} ARGEND
	if(argc != 0)
		usage();

	if(fmtinstall('H', Hfmt) < 0)
		sysfatal("fmtinstall");

	if(readimghdr(0, &h) < 0)
		sysfatal("header: %r");
	fprint(1, "%H", h);

	n = Dy(h.r) * Dx(h.r) * chantodepth(h.chan)/8;
	o = 0;
	while((m = read(0, buf, sizeof buf)) > 0) {
		if(write(1, buf, m) != m)
			sysfatal("write: %r");
		o += m;
	}
	if(m < 0)
		sysfatal("read: %r");

	if(Binit(&b, 1, OWRITE) < 0)
		sysfatal("Binit");

	while(o++ < n)
		Bputc(&b, 0);

	exits(nil);
}