#include <u.h>
#include <libc.h>
#include <draw.h>

typedef struct ImgHdr {
	int	compressed;
	ulong	chan;
	Rectangle	r;
} ImgHdr;

#pragma varargck type "H" ImgHdr

int Hfmt(Fmt *);
int readimghdr(int fd, ImgHdr *);