shithub: ifilter

ref: 200239cdda62ba801df9c079a773cca999348a90
dir: ifilter/a.h

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

typedef uchar*(*filterfn)(uchar*, int, int, int);

void	applyfilter(const char*, filterfn);
int		clamp(int);
uchar*	eallocbuf(ulong);

enum
{
	Cblue,
	Cgreen,
	Cred,
	Calpha,
};