1 typedef struct	Cachefont Cachefont;
2 typedef struct	Cacheinfo Cacheinfo;
3 typedef struct	Cachesubf Cachesubf;
4 typedef struct	Display Display;
5 typedef struct	Font Font;
6 typedef struct	Fontchar Fontchar;
7 typedef struct	Image Image;
8 typedef struct	Mouse Mouse;
9 typedef struct	Point Point;
10 typedef struct	Rectangle Rectangle;
11 typedef struct	RGB RGB;
12 typedef struct	Screen Screen;
13 typedef struct	Subfont Subfont;
14 
15 extern	int	Rfmt(Fmt*);
16 extern	int	Pfmt(Fmt*);
17 
18 enum
19 {
20 	DOpaque		= 0xFFFFFFFF,
21 	DTransparent	= 0x00000000,		/* only useful for allocimage, memfillcolor */
22 	DBlack		= 0x000000FF,
23 	DWhite		= 0xFFFFFFFF,
24 	DRed		= 0xFF0000FF,
25 	DGreen		= 0x00FF00FF,
26 	DBlue		= 0x0000FFFF,
27 	DCyan		= 0x00FFFFFF,
28 	DMagenta		= 0xFF00FFFF,
29 	DYellow		= 0xFFFF00FF,
30 	DPaleyellow	= 0xFFFFAAFF,
31 	DDarkyellow	= 0xEEEE9EFF,
32 	DDarkgreen	= 0x448844FF,
33 	DPalegreen	= 0xAAFFAAFF,
34 	DMedgreen	= 0x88CC88FF,
35 	DDarkblue	= 0x000055FF,
36 	DPalebluegreen= 0xAAFFFFFF,
37 	DPaleblue		= 0x0000BBFF,
38 	DBluegreen	= 0x008888FF,
39 	DGreygreen	= 0x55AAAAFF,
40 	DPalegreygreen	= 0x9EEEEEFF,
41 	DYellowgreen	= 0x99994CFF,
42 	DMedblue		= 0x000099FF,
43 	DGreyblue	= 0x005DBBFF,
44 	DPalegreyblue	= 0x4993DDFF,
45 	DPurpleblue	= 0x8888CCFF,
46 
47 	DNotacolor	= 0xFFFFFF00,
48 	DNofill		= DNotacolor,
49 	
50 };
51 
52 enum
53 {
54 	Displaybufsize	= 8000,
55 	ICOSSCALE	= 1024,
56 	Borderwidth =	4,
57 };
58 
59 enum
60 {
61 	/* refresh methods */
62 	Refbackup	= 0,
63 	Refnone		= 1,
64 	Refmesg		= 2
65 };
66 #define	NOREFRESH	((void*)-1)
67 
68 enum
69 {
70 	/* line ends */
71 	Endsquare	= 0,
72 	Enddisc		= 1,
73 	Endarrow	= 2,
74 	Endmask		= 0x1F
75 };
76 
77 #define	ARROW(a, b, c)	(Endarrow|((a)<<5)|((b)<<14)|((c)<<23))
78 
79 typedef enum
80 {
81 	/* Porter-Duff compositing operators */
82 	Clear	= 0,
83 
84 	SinD	= 8,
85 	DinS	= 4,
86 	SoutD	= 2,
87 	DoutS	= 1,
88 
89 	S		= SinD|SoutD,
90 	SoverD	= SinD|SoutD|DoutS,
91 	SatopD	= SinD|DoutS,
92 	SxorD	= SoutD|DoutS,
93 
94 	D		= DinS|DoutS,
95 	DoverS	= DinS|DoutS|SoutD,
96 	DatopS	= DinS|SoutD,
97 	DxorS	= DoutS|SoutD,	/* == SxorD */
98 
99 	Ncomp = 12,
100 } Drawop;
101 
102 /*
103  * image channel descriptors 
104  */
105 enum {
106 	CRed = 0,
107 	CGreen,
108 	CBlue,
109 	CGrey,
110 	CAlpha,
111 	CMap,
112 	CIgnore,
113 	NChan,
114 };
115 
116 #define __DC(type, nbits)	((((type)&15)<<4)|((nbits)&15))
117 #define CHAN1(a,b)	__DC(a,b)
118 #define CHAN2(a,b,c,d)	(CHAN1((a),(b))<<8|__DC((c),(d)))
119 #define CHAN3(a,b,c,d,e,f)	(CHAN2((a),(b),(c),(d))<<8|__DC((e),(f)))
120 #define CHAN4(a,b,c,d,e,f,g,h)	(CHAN3((a),(b),(c),(d),(e),(f))<<8|__DC((g),(h)))
121 
122 #define NBITS(c) ((c)&15)
123 #define TYPE(c) (((c)>>4)&15)
124 
125 enum {
126 	GREY1	= CHAN1(CGrey, 1),
127 	GREY2	= CHAN1(CGrey, 2),
128 	GREY4	= CHAN1(CGrey, 4),
129 	GREY8	= CHAN1(CGrey, 8),
130 	CMAP8	= CHAN1(CMap, 8),
131 	RGB15	= CHAN4(CIgnore, 1, CRed, 5, CGreen, 5, CBlue, 5),
132 	RGB16	= CHAN3(CRed, 5, CGreen, 6, CBlue, 5),
133 	RGB24	= CHAN3(CRed, 8, CGreen, 8, CBlue, 8),
134 	BGR24	= CHAN3(CBlue, 8, CGreen, 8, CRed, 8),
135 	RGBA32	= CHAN4(CRed, 8, CGreen, 8, CBlue, 8, CAlpha, 8),
136 	ARGB32	= CHAN4(CAlpha, 8, CRed, 8, CGreen, 8, CBlue, 8),	/* stupid VGAs */
137 	XRGB32  = CHAN4(CIgnore, 8, CRed, 8, CGreen, 8, CBlue, 8),
138 	XBGR32  = CHAN4(CIgnore, 8, CBlue, 8, CGreen, 8, CRed, 8),
139 };
140 
141 extern	char*	chantostr(char*, u32int);
142 extern	u32int	strtochan(char*);
143 extern	int		chantodepth(u32int);
144 
145 struct	Point
146 {
147 	int	x;
148 	int	y;
149 };
150 
151 struct Rectangle
152 {
153 	Point	min;
154 	Point	max;
155 };
156 
157 typedef void	(*Reffn)(Image*, Rectangle, void*);
158 
159 struct Screen
160 {
161 	Display	*display;	/* display holding data */
162 	int	id;		/* id of system-held Screen */
163 	Image	*image;		/* unused; for reference only */
164 	Image	*fill;		/* color to paint behind windows */
165 };
166 
167 struct Display
168 {
169 	QLock		qlock;
170 	int		locking;	/*program is using lockdisplay */
171 	int		dirno;
172 	int		imageid;
173 	int		local;
174 	void		(*error)(Display*, char*);
175 	char		*devdir;
176 	char		*windir;
177 	char		oldlabel[64];
178 	u32int		dataqid;
179 	Image		*image;
180 	Image		*white;
181 	Image		*black;
182 	Image		*opaque;
183 	Image		*transparent;
184 	uchar		*buf;
185 	int		bufsize;
186 	uchar		*bufp;
187 	uchar		*obuf;
188 	int		obufsize;
189 	uchar		*obufp;
190 	Font		*defaultfont;
191 	Subfont		*defaultsubfont;
192 	Image		*windows;
193 	Image		*screenimage;
194 	int		_isnewdisplay;
195 };
196 
197 struct Image
198 {
199 	Display		*display;	/* display holding data */
200 	int		id;		/* id of system-held Image */
201 	Rectangle	r;		/* rectangle in data area, local coords */
202 	Rectangle 	clipr;		/* clipping region */
203 	int		depth;		/* number of bits per pixel */
204 	u32int	chan;
205 	int		repl;		/* flag: data replicates to tile clipr */
206 	Screen		*screen;	/* 0 if not a window */
207 	Image		*next;	/* next in list of windows */
208 };
209 
210 struct RGB
211 {
212 	u32int	red;
213 	u32int	green;
214 	u32int	blue;
215 };
216 
217 /*
218  * Subfonts
219  *
220  * given char c, Subfont *f, Fontchar *i, and Point p, one says
221  *	i = f->info+c;
222  *	draw(b, Rect(p.x+i->left, p.y+i->top,
223  *		p.x+i->left+((i+1)->x-i->x), p.y+i->bottom),
224  *		color, f->bits, Pt(i->x, i->top));
225  *	p.x += i->width;
226  * to draw characters in the specified color (itself an Image) in Image b.
227  */
228 
229 struct	Fontchar
230 {
231 	int		x;		/* left edge of bits */
232 	uchar		top;		/* first non-zero scan-line */
233 	uchar		bottom;		/* last non-zero scan-line + 1 */
234 	char		left;		/* offset of baseline */
235 	uchar		width;		/* width of baseline */
236 };
237 
238 struct	Subfont
239 {
240 	char		*name;
241 	short		n;		/* number of chars in font */
242 	uchar		height;		/* height of image */
243 	char		ascent;		/* top of image to baseline */
244 	Fontchar 	*info;		/* n+1 character descriptors */
245 	Image		*bits;		/* of font */
246 	int		ref;
247 };
248 
249 enum
250 {
251 	/* starting values */
252 	LOG2NFCACHE =	6,
253 	NFCACHE =	(1<<LOG2NFCACHE),	/* #chars cached */
254 	NFLOOK =	5,			/* #chars to scan in cache */
255 	NFSUBF =	2,			/* #subfonts to cache */
256 	/* max value */
257 	MAXFCACHE =	1024+NFLOOK,		/* upper limit */
258 	MAXSUBF =	50,			/* generous upper limit */
259 	/* deltas */
260 	DSUBF = 	4,
261 	/* expiry ages */
262 	SUBFAGE	=	10000,
263 	CACHEAGE =	10000
264 };
265 
266 struct Cachefont
267 {
268 	Rune		min;	/* lowest rune value to be taken from subfont */
269 	Rune		max;	/* highest rune value+1 to be taken from subfont */
270 	int		offset;	/* position in subfont of character at min */
271 	char		*name;			/* stored in font */
272 	char		*subfontname;		/* to access subfont */
273 };
274 
275 struct Cacheinfo
276 {
277 	ushort		x;		/* left edge of bits */
278 	uchar		width;		/* width of baseline */
279 	schar		left;		/* offset of baseline */
280 	Rune		value;	/* value of character at this slot in cache */
281 	ushort		age;
282 };
283 
284 struct Cachesubf
285 {
286 	u32int		age;	/* for replacement */
287 	Cachefont	*cf;	/* font info that owns us */
288 	Subfont		*f;	/* attached subfont */
289 };
290 
291 struct Font
292 {
293 	char		*name;
294 	Display		*display;
295 	short		height;	/* max height of image, interline spacing */
296 	short		ascent;	/* top of image to baseline */
297 	short		width;	/* widest so far; used in caching only */	
298 	short		nsub;	/* number of subfonts */
299 	u32int		age;	/* increasing counter; used for LRU */
300 	int		maxdepth;	/* maximum depth of all loaded subfonts */
301 	int		ncache;	/* size of cache */
302 	int		nsubf;	/* size of subfont list */
303 	Cacheinfo	*cache;
304 	Cachesubf	*subf;
305 	Cachefont	**sub;	/* as read from file */
306 	Image		*cacheimage;
307 };
308 
309 #define	Dx(r)	((r).max.x-(r).min.x)
310 #define	Dy(r)	((r).max.y-(r).min.y)
311 
312 /*
313  * Image management
314  */
315 extern Image*	_allocimage(Image*, Display*, Rectangle, u32int, int, u32int, int, int);
316 extern Image*	allocimage(Display*, Rectangle, u32int, int, u32int);
317 extern uchar*	bufimage(Display*, int);
318 extern int	bytesperline(Rectangle, int);
319 extern void	closedisplay(Display*);
320 extern void	drawerror(Display*, char*);
321 extern int	flushimage(Display*, int);
322 extern int	freeimage(Image*);
323 extern int	_freeimage1(Image*);
324 extern int	geninitdraw(char*, void(*)(Display*, char*), char*, char*, char*, int);
325 extern int	initdraw(void(*)(Display*, char*), char*, char*);
326 extern int	newwindow(char*);
327 extern int	loadimage(Image*, Rectangle, uchar*, int);
328 extern int	cloadimage(Image*, Rectangle, uchar*, int);
329 extern int	getwindow(Display*, int);
330 extern int	gengetwindow(Display*, char*, Image**, Screen**, int);
331 extern Image* readimage(Display*, int, int);
332 extern Image* creadimage(Display*, int, int);
333 extern int	unloadimage(Image*, Rectangle, uchar*, int);
334 extern int	wordsperline(Rectangle, int);
335 extern int	writeimage(int, Image*, int);
336 extern Image*	namedimage(Display*, char*);
337 extern int	nameimage(Image*, char*, int);
338 extern Image* allocimagemix(Display*, u32int, u32int);
339 
340 /*
341  * Colors
342  */
343 extern	void	readcolmap(Display*, RGB*);
344 extern	void	writecolmap(Display*, RGB*);
345 extern	u32int	setalpha(u32int, uchar);
346 
347 /*
348  * Windows
349  */
350 extern Screen*	allocscreen(Image*, Image*, int);
351 extern Image*	_allocwindow(Image*, Screen*, Rectangle, int, u32int);
352 extern Image*	allocwindow(Screen*, Rectangle, int, u32int);
353 extern void	bottomnwindows(Image**, int);
354 extern void	bottomwindow(Image*);
355 extern int	freescreen(Screen*);
356 extern Screen*	publicscreen(Display*, int, u32int);
357 extern void	topnwindows(Image**, int);
358 extern void	topwindow(Image*);
359 extern int	originwindow(Image*, Point, Point);
360 
361 /*
362  * Geometry
363  */
364 extern Point		Pt(int, int);
365 extern Rectangle	Rect(int, int, int, int);
366 extern Rectangle	Rpt(Point, Point);
367 extern Point		addpt(Point, Point);
368 extern Point		subpt(Point, Point);
369 extern Point		divpt(Point, int);
370 extern Point		mulpt(Point, int);
371 extern int		eqpt(Point, Point);
372 extern int		eqrect(Rectangle, Rectangle);
373 extern Rectangle	insetrect(Rectangle, int);
374 extern Rectangle	rectaddpt(Rectangle, Point);
375 extern Rectangle	rectsubpt(Rectangle, Point);
376 extern Rectangle	canonrect(Rectangle);
377 extern int		rectXrect(Rectangle, Rectangle);
378 extern int		rectinrect(Rectangle, Rectangle);
379 extern void		combinerect(Rectangle*, Rectangle);
380 extern int		rectclip(Rectangle*, Rectangle);
381 extern int		ptinrect(Point, Rectangle);
382 extern void		replclipr(Image*, int, Rectangle);
383 extern int		drawreplxy(int, int, int);	/* used to be drawsetxy */
384 extern Point	drawrepl(Rectangle, Point);
385 extern int		rgb2cmap(int, int, int);
386 extern int		cmap2rgb(int);
387 extern int		cmap2rgba(int);
388 extern void		icossin(int, int*, int*);
389 extern void		icossin2(int, int, int*, int*);
390 
391 /*
392  * Graphics
393  */
394 extern void	draw(Image*, Rectangle, Image*, Image*, Point);
395 extern void	drawop(Image*, Rectangle, Image*, Image*, Point, Drawop);
396 extern void	gendraw(Image*, Rectangle, Image*, Point, Image*, Point);
397 extern void	gendrawop(Image*, Rectangle, Image*, Point, Image*, Point, Drawop);
398 extern void	line(Image*, Point, Point, int, int, int, Image*, Point);
399 extern void	lineop(Image*, Point, Point, int, int, int, Image*, Point, Drawop);
400 extern void	poly(Image*, Point*, int, int, int, int, Image*, Point);
401 extern void	polyop(Image*, Point*, int, int, int, int, Image*, Point, Drawop);
402 extern void	fillpoly(Image*, Point*, int, int, Image*, Point);
403 extern void	fillpolyop(Image*, Point*, int, int, Image*, Point, Drawop);
404 extern Point	string(Image*, Point, Image*, Point, Font*, char*);
405 extern Point	stringop(Image*, Point, Image*, Point, Font*, char*, Drawop);
406 extern Point	stringn(Image*, Point, Image*, Point, Font*, char*, int);
407 extern Point	stringnop(Image*, Point, Image*, Point, Font*, char*, int, Drawop);
408 extern Point	runestring(Image*, Point, Image*, Point, Font*, Rune*);
409 extern Point	runestringop(Image*, Point, Image*, Point, Font*, Rune*, Drawop);
410 extern Point	runestringn(Image*, Point, Image*, Point, Font*, Rune*, int);
411 extern Point	runestringnop(Image*, Point, Image*, Point, Font*, Rune*, int, Drawop);
412 extern Point	stringbg(Image*, Point, Image*, Point, Font*, char*, Image*, Point);
413 extern Point	stringbgop(Image*, Point, Image*, Point, Font*, char*, Image*, Point, Drawop);
414 extern Point	stringnbg(Image*, Point, Image*, Point, Font*, char*, int, Image*, Point);
415 extern Point	stringnbgop(Image*, Point, Image*, Point, Font*, char*, int, Image*, Point, Drawop);
416 extern Point	runestringbg(Image*, Point, Image*, Point, Font*, Rune*, Image*, Point);
417 extern Point	runestringbgop(Image*, Point, Image*, Point, Font*, Rune*, Image*, Point, Drawop);
418 extern Point	runestringnbg(Image*, Point, Image*, Point, Font*, Rune*, int, Image*, Point);
419 extern Point	runestringnbgop(Image*, Point, Image*, Point, Font*, Rune*, int, Image*, Point, Drawop);
420 extern Point	_string(Image*, Point, Image*, Point, Font*, char*, Rune*, int, Rectangle, Image*, Point, Drawop);
421 extern Point	stringsubfont(Image*, Point, Image*, Subfont*, char*);
422 extern int		bezier(Image*, Point, Point, Point, Point, int, int, int, Image*, Point);
423 extern int		bezierop(Image*, Point, Point, Point, Point, int, int, int, Image*, Point, Drawop);
424 extern int		bezspline(Image*, Point*, int, int, int, int, Image*, Point);
425 extern int		bezsplineop(Image*, Point*, int, int, int, int, Image*, Point, Drawop);
426 extern int		bezsplinepts(Point*, int, Point**);
427 extern int		fillbezier(Image*, Point, Point, Point, Point, int, Image*, Point);
428 extern int		fillbezierop(Image*, Point, Point, Point, Point, int, Image*, Point, Drawop);
429 extern int		fillbezspline(Image*, Point*, int, int, Image*, Point);
430 extern int		fillbezsplineop(Image*, Point*, int, int, Image*, Point, Drawop);
431 extern void	ellipse(Image*, Point, int, int, int, Image*, Point);
432 extern void	ellipseop(Image*, Point, int, int, int, Image*, Point, Drawop);
433 extern void	fillellipse(Image*, Point, int, int, Image*, Point);
434 extern void	fillellipseop(Image*, Point, int, int, Image*, Point, Drawop);
435 extern void	arc(Image*, Point, int, int, int, Image*, Point, int, int);
436 extern void	arcop(Image*, Point, int, int, int, Image*, Point, int, int, Drawop);
437 extern void	fillarc(Image*, Point, int, int, Image*, Point, int, int);
438 extern void	fillarcop(Image*, Point, int, int, Image*, Point, int, int, Drawop);
439 extern void	border(Image*, Rectangle, int, Image*, Point);
440 extern void	borderop(Image*, Rectangle, int, Image*, Point, Drawop);
441 
442 /*
443  * Font management
444  */
445 extern Font*	openfont(Display*, char*);
446 extern Font*	buildfont(Display*, char*, char*);
447 extern void	freefont(Font*);
448 extern Font*	mkfont(Subfont*, Rune);
449 extern int	cachechars(Font*, char**, Rune**, ushort*, int, int*, char**);
450 extern void	agefont(Font*);
451 extern Subfont*	allocsubfont(char*, int, int, int, Fontchar*, Image*);
452 extern Subfont*	lookupsubfont(Display*, char*);
453 extern void	installsubfont(char*, Subfont*);
454 extern void	uninstallsubfont(Subfont*);
455 extern void	freesubfont(Subfont*);
456 extern Subfont*	readsubfont(Display*, char*, int, int);
457 extern Subfont*	readsubfonti(Display*, char*, int, Image*, int);
458 extern int	writesubfont(int, Subfont*);
459 extern void	_unpackinfo(Fontchar*, uchar*, int);
460 extern Point	stringsize(Font*, char*);
461 extern int	stringwidth(Font*, char*);
462 extern int	stringnwidth(Font*, char*, int);
463 extern Point	runestringsize(Font*, Rune*);
464 extern int	runestringwidth(Font*, Rune*);
465 extern int	runestringnwidth(Font*, Rune*, int);
466 extern Point	strsubfontwidth(Subfont*, char*);
467 extern int	loadchar(Font*, Rune, Cacheinfo*, int, int, char**);
468 extern char*	subfontname(char*, char*, int);
469 extern Subfont*	_getsubfont(Display*, char*);
470 extern Subfont*	getdefont(Display*);
471 extern void		lockdisplay(Display*);
472 extern void	unlockdisplay(Display*);
473 extern int		drawlsetrefresh(u32int, int, void*, void*);
474 
475 /*
476  * Predefined 
477  */
478 extern	uchar	defontdata[];
479 extern	int		sizeofdefont;
480 extern	Point		ZP;
481 extern	Rectangle	ZR;
482 
483 /*
484  * Set up by initdraw()
485  */
486 extern	Display	*display;
487 extern	Font		*font;
488 extern	Image	*screen;
489 extern	Screen	*_screen;
490 extern	int	_cursorfd;
491 extern	int	_drawdebug;	/* set to 1 to see errors from flushimage */
492 extern	void	_setdrawop(Display*, Drawop);
493 extern	Display	*_initdisplay(void(*)(Display*,char*), char*);
494 
495 #define	BGSHORT(p)		(((p)[0]<<0) | ((p)[1]<<8))
496 #define	BGLONG(p)		((BGSHORT(p)<<0) | (BGSHORT(p+2)<<16))
497 #define	BPSHORT(p, v)		((p)[0]=(v), (p)[1]=((v)>>8))
498 #define	BPLONG(p, v)		(BPSHORT(p, (v)), BPSHORT(p+2, (v)>>16))
499 
500 /*
501  * Compressed image file parameters and helper routines
502  */
503 #define	NMATCH	3		/* shortest match possible */
504 #define	NRUN	(NMATCH+31)	/* longest match possible */
505 #define	NMEM	1024		/* window size */
506 #define	NDUMP	128		/* maximum length of dump */
507 #define	NCBLOCK	6000		/* size of compressed blocks */
508 extern	void	_twiddlecompressed(uchar*, int);
509 extern	int	_compblocksize(Rectangle, int);
510 
511 /* XXX backwards helps; should go */
512 extern	u32int	drawld2chan[];
513 extern	void		drawsetdebug(int);
514 
515 /*
516  * Snarf buffer
517  */
518 enum
519 {
520 	SnarfSize = 64*1024,
521 };
522 char *getsnarf(void);
523 void putsnarf(char*);
524 
525 void drawtopwindow(void);
526 
527 /*
528  * Port magic.
529  */
530 int	_drawmsgread(Display*, void*, int);
531 int	_drawmsgwrite(Display*, void*, int);