20060303

1 files changed, 173 insertions, 0 deletions

diff --git a/os/pc/screen.h b/os/pc/screen.h
new file mode 100644
index 00000000..bcc1f230
--- /dev/null
+++ b/os/pc/screen.h
@@ -0,0 +1,173 @@
+typedef struct Cursor Cursor;
+
+enum {
+	CURSWID = 16,
+	CURSHGT = 16,
+};
+
+struct	Cursor
+{
+	Point	offset;
+	uchar	clr[CURSWID/BI2BY*CURSHGT];
+	uchar	set[CURSWID/BI2BY*CURSHGT];
+};
+typedef struct Cursorinfo Cursorinfo;
+struct Cursorinfo {
+	Cursor;
+	Lock;
+};
+
+/* devmouse.c */
+extern void mousetrack(int, int, int, int);
+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;
+
+/*
+ * Generic VGA registers.
+ */
+enum {
+	MiscW		= 0x03C2,	/* Miscellaneous Output (W) */
+	MiscR		= 0x03CC,	/* Miscellaneous Output (R) */
+	Status0		= 0x03C2,	/* Input status 0 (R) */
+	Status1		= 0x03DA,	/* Input Status 1 (R) */
+	FeatureR	= 0x03CA,	/* Feature Control (R) */
+	FeatureW	= 0x03DA,	/* Feature Control (W) */
+
+	Seqx		= 0x03C4,	/* Sequencer Index, Data at Seqx+1 */
+	Crtx		= 0x03D4,	/* CRT Controller Index, Data at Crtx+1 */
+	Grx		= 0x03CE,	/* Graphics Controller Index, Data at Grx+1 */
+	Attrx		= 0x03C0,	/* Attribute Controller Index and Data */
+
+	PaddrW		= 0x03C8,	/* Palette Address Register, write */
+	Pdata		= 0x03C9,	/* Palette Data Register */
+	Pixmask		= 0x03C6,	/* Pixel Mask Register */
+	PaddrR		= 0x03C7,	/* Palette Address Register, read */
+	Pstatus		= 0x03C7,	/* DAC Status (RO) */
+
+	Pcolours	= 256,		/* Palette */
+	Pred		= 0,
+	Pgreen		= 1,
+	Pblue		= 2,
+
+	Pblack		= 0x00,
+	Pwhite		= 0xFF,
+};
+
+#define VGAMEM()	0xA0000
+#define vgai(port)		inb(port)
+#define vgao(port, data)	outb(port, data)
+
+extern int vgaxi(long, uchar);
+extern int vgaxo(long, uchar, uchar);
+
+/*
+ */
+typedef struct VGAdev VGAdev;
+typedef struct VGAcur VGAcur;
+typedef struct VGAscr VGAscr;
+
+struct VGAdev {
+	char*	name;
+
+	void	(*enable)(VGAscr*);
+	void	(*disable)(VGAscr*);
+	void	(*page)(VGAscr*, int);
+	ulong	(*linear)(VGAscr*, int*, int*);
+	void	(*drawinit)(VGAscr*);
+	int	(*fill)(VGAscr*, Rectangle, ulong);
+	void	(*ovlctl)(VGAscr*, Chan*, void*, int);
+	int	(*ovlwrite)(VGAscr*, void*, int, vlong);
+	void (*flush)(VGAscr*, Rectangle);
+};
+
+struct VGAcur {
+	char*	name;
+
+	void	(*enable)(VGAscr*);
+	void	(*disable)(VGAscr*);
+	void	(*load)(VGAscr*, Cursor*);
+	int	(*move)(VGAscr*, Point);
+
+	int	doespanning;
+};
+
+/*
+ */
+struct VGAscr {
+	Lock	devlock;
+	VGAdev*	dev;
+
+	VGAcur*	cur;
+	ulong	storage;
+	Cursor;
+
+	int	useflush;
+
+	ulong	aperture;			/* physical address */
+	int	isupamem;
+	int	apsize;
+
+	ulong	io;				/* device specific registers */
+
+	ulong	colormap[Pcolours][3];
+	int	palettedepth;
+
+	ulong	*mmio;
+	Memimage* gscreen;
+	Memdata* gscreendata;
+	Memsubfont* memdefont;
+
+	int	(*fill)(VGAscr*, Rectangle, ulong);
+	int	(*scroll)(VGAscr*, Rectangle, Rectangle);
+	void	(*blank)(VGAscr*, int);
+	ulong	id;	/* internal identifier for driver use */
+	int isblank;
+	int overlayinit;
+};
+
+extern VGAscr vgascreen[];
+
+enum {
+	Backgnd		= 0,	/* black */
+};
+
+/* mouse.c */
+extern void mousectl(Cmdbuf*);
+
+/* screen.c */
+extern int		hwaccel;	/* use hw acceleration; default on */
+extern int		hwblank;	/* use hw blanking; default on */
+extern int		panning;	/* use virtual screen panning; default off */
+extern void addvgaseg(char*, ulong, ulong);
+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);
+
+/* devdraw.c */
+extern void	deletescreenimage(void);
+extern int		drawhasclients(void);
+extern ulong	blanktime;
+extern void	setscreenimageclipr(Rectangle);
+extern void	drawflush(void);
+extern int drawidletime(void);
+
+/* vga.c */
+extern void	vgascreenwin(VGAscr*);
+extern void	vgaimageinit(ulong);
+extern ulong	vgapcilinear(VGAscr*, int*, int*, int, int);
+
+extern void	drawblankscreen(int);
+extern void	vgablank(VGAscr*, int);