ref: ba413ddffe893bcaac763e1c08920c0312a20b33
dir: /a.h/
#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, };