/*  * This file is part of the UCB release of Plan 9. It is subject to the license * terms in the LICENSE file found in the top-level directory of this * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No * part of the UCB release of Plan 9, including this file, may be copied, * modified, propagated, or distributed except according to the terms contained * in the LICENSE file. */ typedef struct Cursor Cursor;typedef struct Cursorinfo	Cursorinfo;typedef struct OScreen OScreen;typedef struct Omap3fb Omap3fb;typedef struct Settings Settings; struct Cursorinfo{	Cursor;	Lock;}; extern Cursor	arrow;extern Cursorinfo cursor; /* devmouse.c */extern void mousetrack(int, int, int, int);extern Point mousexy(void); extern void	mouseaccelerate(int);extern void	mouseresize(void); /* screen.c */extern uchar* attachscreen(Rectangle*, ulong*, int*, int*, int*);extern void	flushmemscreen(Rectangle);extern int	cursoron(int);extern void	cursoroff(int);extern void	setcursor(Cursor*);extern int	screensize(int, int, int, ulong);extern int	screenaperture(int, int);extern Rectangle physgscreenr;	/* actual monitor size */extern void	blankscreen(int); extern void swcursorinit(void);extern void swcursorhide(void);extern void swcursoravoid(Rectangle);extern void swcursorunhide(void); /* devdraw.c */extern void	deletescreenimage(void);extern void	resetscreenimage(void);extern int		drawhasclients(void);extern ulong	blanktime;extern void	setscreenimageclipr(Rectangle);extern void	drawflush(void);extern int drawidletime(void);extern QLock	drawlock; #define ishwimage(i)	0		/* for ../port/devdraw.c */ /* for communication between devdss.c and screen.c */ enum {	/* maxima */	Wid		= 1280,	Ht		= 1024,	Depth		= 16,		/* bits per pixel */ 	Pcolours	= 256,		/* Palette */	Pred		= 0,	Pgreen		= 1,	Pblue		= 2, 	Pblack		= 0x00,	Pwhite		= 0xFF, 	/* settings indices */	Res800x600	= 0,	Res1024x768,	Res1280x1024,	Res1400x1050,}; struct Settings {	uint	wid;		/* width in pixels */	uint	ht;		/* height in pixels */	uint	freq;		/* refresh frequency; only printed */	uint	chan;		/* draw chan */ 	/* shouldn't be needed? */	uint	pixelclock; 	/* horizontal timing */	uint	hbp;		/* back porch: pixel clocks before scan line */	uint	hfp;		/* front porch: pixel clocks after scan line */	uint	hsw;		/* sync pulse width: more hfp */ 	/* vertical timing */	uint	vbp;		/* back porch: line clocks before frame */	uint	vfp;		/* front porch: line clocks after frame */	uint	vsw;		/* sync pulse width: more vfp */}; struct OScreen {	Lock;	Cursor;	Settings *settings;	int	open;}; struct Omap3fb {		/* frame buffer for 24-bit active color *///	short	palette[256];	/* pixel data, even; base type's width must match Depth */	ushort	pixel[Wid*Ht];};