#pragma src "/sys/src/libdraw"#pragma lib "libdraw.a" typedef struct	Cachefont Cachefont;typedef struct	Cacheinfo Cacheinfo;typedef struct	Cachesubf Cachesubf;typedef struct	Display Display;typedef struct	Font Font;typedef struct	Fontchar Fontchar;typedef struct	Image Image;typedef struct	Mouse Mouse;typedef struct	Point Point;typedef struct	Rectangle Rectangle;typedef struct	RGB RGB;typedef struct	Screen Screen;typedef struct	Subfont Subfont; #pragma varargck	type	"R"	Rectangle#pragma varargck	type	"P"	Pointextern	int	Rfmt(Fmt*);extern	int	Pfmt(Fmt*); enum{	DOpaque		= 0xFFFFFFFF,	DTransparent	= 0x00000000,		/* only useful for allocimage, memfillcolor */	DBlack		= 0x000000FF,	DWhite		= 0xFFFFFFFF,	DRed		= 0xFF0000FF,	DGreen		= 0x00FF00FF,	DBlue		= 0x0000FFFF,	DCyan		= 0x00FFFFFF,	DMagenta		= 0xFF00FFFF,	DYellow		= 0xFFFF00FF,	DPaleyellow	= 0xFFFFAAFF,	DDarkyellow	= 0xEEEE9EFF,	DDarkgreen	= 0x448844FF,	DPalegreen	= 0xAAFFAAFF,	DMedgreen	= 0x88CC88FF,	DDarkblue	= 0x000055FF,	DPalebluegreen= 0xAAFFFFFF,	DPaleblue		= 0x0000BBFF,	DBluegreen	= 0x008888FF,	DGreygreen	= 0x55AAAAFF,	DPalegreygreen	= 0x9EEEEEFF,	DYellowgreen	= 0x99994CFF,	DMedblue		= 0x000099FF,	DGreyblue	= 0x005DBBFF,	DPalegreyblue	= 0x4993DDFF,	DPurpleblue	= 0x8888CCFF, 	DNotacolor	= 0xFFFFFF00,	DNofill		= DNotacolor,	}; enum{	Displaybufsize	= 8000,	ICOSSCALE	= 1024,	Borderwidth =	4,}; enum{	/* refresh methods */	Refbackup	= 0,	Refnone		= 1,	Refmesg		= 2};#define	NOREFRESH	((void*)-1) enum{	/* line ends */	Endsquare	= 0,	Enddisc		= 1,	Endarrow	= 2,	Endmask		= 0x1F}; #define	ARROW(a, b, c)	(Endarrow|((a)<<5)|((b)<<14)|((c)<<23)) /* * Porter-Duff operators */enum{	Clear	= 0, 	SinD	= 8,	DinS	= 4,	SoutD	= 2,	DoutS	= 1, 	S		= SinD|SoutD,	SoverD	= SinD|SoutD|DoutS,	SatopD	= SinD|DoutS,	SxorD	= SoutD|DoutS, 	D		= DinS|DoutS,	DoverS	= DinS|DoutS|SoutD,	DatopS	= DinS|SoutD,	DxorS	= DoutS|SoutD,	/* == SxorD */}; /* * image channel descriptors  */enum {	CRed = 0,	CGreen,	CBlue,	CGrey,	CAlpha,	CMap,	CIgnore,	NChan,}; #define __DC(type, nbits)	((((type)&15)<<4)|((nbits)&15))#define CHAN1(a,b)	__DC(a,b)#define CHAN2(a,b,c,d)	(CHAN1((a),(b))<<8|__DC((c),(d)))#define CHAN3(a,b,c,d,e,f)	(CHAN2((a),(b),(c),(d))<<8|__DC((e),(f)))#define CHAN4(a,b,c,d,e,f,g,h)	(CHAN3((a),(b),(c),(d),(e),(f))<<8|__DC((g),(h))) #define NBITS(c) ((c)&15)#define TYPE(c) (((c)>>4)&15) enum {	GREY1	= CHAN1(CGrey, 1),	GREY2	= CHAN1(CGrey, 2),	GREY4	= CHAN1(CGrey, 4),	GREY8	= CHAN1(CGrey, 8),	CMAP8	= CHAN1(CMap, 8),	RGB15	= CHAN4(CIgnore, 1, CRed, 5, CGreen, 5, CBlue, 5),	RGB16	= CHAN3(CRed, 5, CGreen, 6, CBlue, 5),	RGB24	= CHAN3(CRed, 8, CGreen, 8, CBlue, 8),	RGBA32	= CHAN4(CRed, 8, CGreen, 8, CBlue, 8, CAlpha, 8),	ARGB32	= CHAN4(CAlpha, 8, CRed, 8, CGreen, 8, CBlue, 8),	/* stupid VGAs */	XRGB32  = CHAN4(CIgnore, 8, CRed, 8, CGreen, 8, CBlue, 8),}; extern	char*	chantostr(char*, ulong);extern	ulong	strtochan(char*);extern	int		chantodepth(ulong); struct	Point{	int	x;	int	y;}; struct Rectangle{	Point	min;	Point	max;}; typedef void	(*Reffn)(Image*, Rectangle, void*); struct Screen{	Display	*display;	/* display holding data */	int	id;		/* id of system-held Screen */	Image	*image;		/* unused; for reference only */	Image	*fill;		/* color to paint behind windows */}; struct Display{	QLock	qlock;	int		locking;	/*program is using lockdisplay */	int		dirno;	int		fd;	int		reffd;	int		ctlfd;	int		imageid;	int		local;	void		(*error)(Display*, char*);	char		*devdir;	char		*windir;	char		oldlabel[64];	ulong		dataqid;	Image		*white;	Image		*black;	Image		*opaque;	Image		*transparent;	Image		*image;	uchar		*buf;	int			bufsize;	uchar		*bufp;	Font		*defaultfont;	Subfont		*defaultsubfont;	Image		*windows;	Image		*screenimage;	int			_isnewdisplay;}; struct Image{	Display		*display;	/* display holding data */	int		id;		/* id of system-held Image */	Rectangle	r;		/* rectangle in data area, local coords */	Rectangle 	clipr;		/* clipping region */	int		depth;		/* number of bits per pixel */	ulong	chan;	int		repl;		/* flag: data replicates to tile clipr */	Screen		*screen;	/* 0 if not a window */	Image		*next;	/* next in list of windows */}; struct RGB{	ulong	red;	ulong	green;	ulong	blue;}; /* * Subfonts * * given char c, Subfont *f, Fontchar *i, and Point p, one says *	i = f->info+c; *	draw(b, Rect(p.x+i->left, p.y+i->top, *		p.x+i->left+((i+1)->x-i->x), p.y+i->bottom), *		color, f->bits, Pt(i->x, i->top)); *	p.x += i->width; * to draw characters in the specified color (itself an Image) in Image b. */ struct	Fontchar{	int		x;		/* left edge of bits */	uchar		top;		/* first non-zero scan-line */	uchar		bottom;		/* last non-zero scan-line + 1 */	char		left;		/* offset of baseline */	uchar		width;		/* width of baseline */}; struct	Subfont{	char		*name;	short		n;		/* number of chars in font */	uchar		height;		/* height of image */	char		ascent;		/* top of image to baseline */	Fontchar 	*info;		/* n+1 character descriptors */	Image		*bits;		/* of font */	int		ref;}; enum{	/* starting values */	LOG2NFCACHE =	6,	NFCACHE =	(1<<LOG2NFCACHE),	/* #chars cached */	NFLOOK =	5,			/* #chars to scan in cache */	NFSUBF =	2,			/* #subfonts to cache */	/* max value */	MAXFCACHE =	1024+NFLOOK,		/* upper limit */	MAXSUBF =	50,			/* generous upper limit */	/* deltas */	DSUBF = 	4,	/* expiry ages */	SUBFAGE	=	10000,	CACHEAGE =	10000}; struct Cachefont{	Rune		min;	/* lowest rune value to be taken from subfont */	Rune		max;	/* highest rune value+1 to be taken from subfont */	int		offset;	/* position in subfont of character at min */	char		*name;			/* stored in font */	char		*subfontname;		/* to access subfont */}; struct Cacheinfo{	ushort		x;		/* left edge of bits */	uchar		width;		/* width of baseline */	schar		left;		/* offset of baseline */	Rune		value;	/* value of character at this slot in cache */	ushort		age;}; struct Cachesubf{	ulong		age;	/* for replacement */	Cachefont	*cf;	/* font info that owns us */	Subfont		*f;	/* attached subfont */}; struct Font{	char		*name;	Display		*display;	short		height;	/* max height of image, interline spacing */	short		ascent;	/* top of image to baseline */	short		width;	/* widest so far; used in caching only */		short		nsub;	/* number of subfonts */	ulong		age;	/* increasing counter; used for LRU */	int		maxdepth;	/* maximum depth of all loaded subfonts */	int		ncache;	/* size of cache */	int		nsubf;	/* size of subfont list */	Cacheinfo	*cache;	Cachesubf	*subf;	Cachefont	**sub;	/* as read from file */	Image		*cacheimage;}; #define	Dx(r)	((r).max.x-(r).min.x)#define	Dy(r)	((r).max.y-(r).min.y) /* * Image management */extern Image*	_allocimage(Image*, Display*, Rectangle, ulong, int, ulong, int, int);extern Image*	allocimage(Display*, Rectangle, ulong, int, ulong);extern uchar*	bufimage(Display*, int);extern int	bytesperline(Rectangle, int);extern void	closedisplay(Display*);extern void	drawerror(Display*, char*);extern int	flushimage(Display*, int);extern int	freeimage(Image*);extern int	_freeimage1(Image*);extern int	geninitdraw(char*, void(*)(Display*, char*), char*, char*, char*, int);extern int	initdraw(void(*)(Display*, char*), char*, char*);extern Display*	initdisplay(char*, char*, void(*)(Display*, char*));extern int	loadimage(Image*, Rectangle, uchar*, int);extern int	cloadimage(Image*, Rectangle, uchar*, int);extern int	getwindow(Display*, int);extern int	gengetwindow(Display*, char*, Image**, Screen**, int);extern Image* readimage(Display*, int, int);extern Image* creadimage(Display*, int, int);extern int	unloadimage(Image*, Rectangle, uchar*, int);extern int	wordsperline(Rectangle, int);extern int	writeimage(int, Image*, int);extern Image*	namedimage(Display*, char*);extern int	nameimage(Image*, char*, int);extern Image* allocimagemix(Display*, ulong, ulong); /* * Colors */extern	void	readcolmap(Display*, RGB*);extern	void	writecolmap(Display*, RGB*);extern	ulong	setalpha(ulong, uchar); /* * Windows */extern Screen*	allocscreen(Image*, Image*, int);extern Image*	_allocwindow(Image*, Screen*, Rectangle, int, ulong);extern Image*	allocwindow(Screen*, Rectangle, int, ulong);extern void	bottomnwindows(Image**, int);extern void	bottomwindow(Image*);extern int	freescreen(Screen*);extern Screen*	publicscreen(Display*, int, ulong);extern void	topnwindows(Image**, int);extern void	topwindow(Image*);extern int	originwindow(Image*, Point, Point); /* * Geometry */extern Point		Pt(int, int);extern Rectangle	Rect(int, int, int, int);extern Rectangle	Rpt(Point, Point);extern Point		addpt(Point, Point);extern Point		subpt(Point, Point);extern Point		divpt(Point, int);extern Point		mulpt(Point, int);extern int		eqpt(Point, Point);extern int		eqrect(Rectangle, Rectangle);extern Rectangle	insetrect(Rectangle, int);extern Rectangle	rectaddpt(Rectangle, Point);extern Rectangle	rectsubpt(Rectangle, Point);extern Rectangle	canonrect(Rectangle);extern int		rectXrect(Rectangle, Rectangle);extern int		rectinrect(Rectangle, Rectangle);extern void		combinerect(Rectangle*, Rectangle);extern int		rectclip(Rectangle*, Rectangle);extern int		ptinrect(Point, Rectangle);extern void		replclipr(Image*, int, Rectangle);extern int		drawreplxy(int, int, int);	/* used to be drawsetxy */extern Point	drawrepl(Rectangle, Point);extern int		rgb2cmap(int, int, int);extern int		cmap2rgb(int);extern int		cmap2rgba(int);extern void		icossin(int, int*, int*);extern void		icossin2(int, int, int*, int*); /* * Graphics */extern void	draw(Image*, Rectangle, Image*, Image*, Point);extern void	gendraw(Image*, Rectangle, Image*, Point, Image*, Point);extern void	line(Image*, Point, Point, int, int, int, Image*, Point);extern void	poly(Image*, Point*, int, int, int, int, Image*, Point);extern void	fillpoly(Image*, Point*, int, int, Image*, Point);extern Point	string(Image*, Point, Image*, Point, Font*, char*);extern Point	stringn(Image*, Point, Image*, Point, Font*, char*, int);extern Point	runestring(Image*, Point, Image*, Point, Font*, Rune*);extern Point	runestringn(Image*, Point, Image*, Point, Font*, Rune*, int);extern Point	stringbg(Image*, Point, Image*, Point, Font*, char*, Image*, Point);extern Point	stringnbg(Image*, Point, Image*, Point, Font*, char*, int, Image*, Point);extern Point	runestringbg(Image*, Point, Image*, Point, Font*, Rune*, Image*, Point);extern Point	runestringnbg(Image*, Point, Image*, Point, Font*, Rune*, int, Image*, Point);extern Point	_string(Image*, Point, Image*, Point, Font*, char*, Rune*, int, Rectangle, Image*, Point);extern Point	stringsubfont(Image*, Point, Image*, Subfont*, char*);extern int		bezier(Image*, Point, Point, Point, Point, int, int, int, Image*, Point);extern int		bezspline(Image*, Point*, int, int, int, int, Image*, Point);extern int		fillbezier(Image*, Point, Point, Point, Point, int, Image*, Point);extern int		fillbezspline(Image*, Point*, int, int, Image*, Point);extern void	ellipse(Image*, Point, int, int, int, Image*, Point);extern void	fillellipse(Image*, Point, int, int, Image*, Point);extern void	arc(Image*, Point, int, int, int, Image*, Point, int, int);extern void	fillarc(Image*, Point, int, int, Image*, Point, int, int);extern void	border(Image*, Rectangle, int, Image*, Point); /* * Font management */extern Font*	openfont(Display*, char*);extern Font*	buildfont(Display*, char*, char*);extern void	freefont(Font*);extern Font*	mkfont(Subfont*, Rune);extern int	cachechars(Font*, char**, Rune**, ushort*, int, int*, char**);extern void	agefont(Font*);extern Subfont*	allocsubfont(char*, int, int, int, Fontchar*, Image*);extern Subfont*	lookupsubfont(Display*, char*);extern void	installsubfont(char*, Subfont*);extern void	uninstallsubfont(Subfont*);extern void	freesubfont(Subfont*);extern Subfont*	readsubfont(Display*, char*, int, int);extern Subfont*	readsubfonti(Display*, char*, int, Image*, int);extern int	writesubfont(int, Subfont*);extern void	_unpackinfo(Fontchar*, uchar*, int);extern Point	stringsize(Font*, char*);extern int	stringwidth(Font*, char*);extern int	stringnwidth(Font*, char*, int);extern Point	runestringsize(Font*, Rune*);extern int	runestringwidth(Font*, Rune*);extern int	runestringnwidth(Font*, Rune*, int);extern Point	strsubfontwidth(Subfont*, char*);extern int	loadchar(Font*, Rune, Cacheinfo*, int, int, char**);extern char*	subfontname(char*, char*, int);extern Subfont*	_getsubfont(Display*, char*);extern Subfont*	getdefont(Display*);extern void		lockdisplay(Display*);extern void	unlockdisplay(Display*);extern int		drawlsetrefresh(ulong, int, void*, void*); /* * Predefined  */extern	uchar	defontdata[];extern	int		sizeofdefont;extern	Point		ZP;extern	Rectangle	ZR; /* * Set up by initdraw() */extern	Display	*display;extern	Font		*font;extern	Image	*screen;extern	Screen	*_screen;extern	int	_cursorfd;extern	int	_drawdebug;	/* set to 1 to see errors from flushimage */ #define	BGSHORT(p)		(((p)[0]<<0) | ((p)[1]<<8))#define	BGLONG(p)		((BGSHORT(p)<<0) | (BGSHORT(p+2)<<16))#define	BPSHORT(p, v)		((p)[0]=(v), (p)[1]=((v)>>8))#define	BPLONG(p, v)		(BPSHORT(p, (v)), BPSHORT(p+2, (v)>>16)) /* * Compressed image file parameters and helper routines */#define	NMATCH	3		/* shortest match possible */#define	NRUN	(NMATCH+31)	/* longest match possible */#define	NMEM	1024		/* window size */#define	NDUMP	128		/* maximum length of dump */#define	NCBLOCK	6000		/* size of compressed blocks */extern	void	_twiddlecompressed(uchar*, int);extern	int	_compblocksize(Rectangle, int); /* XXX backwards helps; should go */extern	int		log2[];extern	ulong	drawld2chan[];extern	void		drawsetdebug(int);