ref: 4696de84b4553d33d2bc1649a55d303c1788a41b
dir: /sys/src/9/sgi/screen.h/
typedef struct Cursor Cursor;
typedef struct Cursorinfo Cursorinfo;
struct Cursorinfo {
	Cursor;
	Lock;
};
/* devmouse.c */
extern void mousetrack(int, int, int, ulong);
extern void absmousetrack(int, int, int, ulong);
extern Point mousexy(void);
extern void mouseaccelerate(int);
extern int m3mouseputc(Queue*, int);
extern int m5mouseputc(Queue*, int);
extern int mouseputc(Queue*, int);
extern Cursorinfo cursor;
extern Cursor arrow;
/* mouse.c */
extern void mousectl(Cmdbuf*);
extern void mouseresize(void);
extern void mouseredraw(void);
/* screen.c */
extern void	blankscreen(int);
extern void	flushmemscreen(Rectangle);
extern Memdata*	attachscreen(Rectangle*, ulong*, int*, int*, int*);
extern void	cursoron(void);
extern void	cursoroff(void);
extern void	setcursor(Cursor*);
/* devdraw.c */
extern QLock	drawlock;
#define ishwimage(i)	0		/* for ../port/devdraw.c */
/* swcursor.c */
void		swcursorhide(void);
void		swcursoravoid(Rectangle);
void		swcursordraw(Point);
void		swcursorload(Cursor *);
void		swcursorinit(void);