ref: 6c99d2f028a889602134f7117ff571991634dcf8
dir: /sys/src/9/bitsy/screen.h/
typedef struct Cursorinfo Cursorinfo;
typedef struct Cursor Cursor;
extern ulong blanktime;
struct Cursorinfo {
Lock;
};
extern void blankscreen(int);
extern void flushmemscreen(Rectangle);
extern uchar* attachscreen(Rectangle*, ulong*, int*, int*, int*);
#define ishwimage(i) 0