1 #ifndef _DRAW_H_
2 #define _DRAW_H_ 1
3 #if defined(__cplusplus)
4 extern "C" { 
5 #endif
6 
7 typedef struct	Cachefont Cachefont;
8 typedef struct	Cacheinfo Cacheinfo;
9 typedef struct	Cachesubf Cachesubf;
10 typedef struct	Display Display;
11 typedef struct	Font Font;
12 typedef struct	Fontchar Fontchar;
13 typedef struct	Image Image;
14 typedef struct	Mouse Mouse;
15 typedef struct	Point Point;
16 typedef struct	Rectangle Rectangle;
17 typedef struct	RGB RGB;
18 typedef struct	Screen Screen;
19 typedef struct	Subfont Subfont;
20 
21 extern	int	Rfmt(Fmt*);
22 extern	int	Pfmt(Fmt*);
23 
24 enum
25 {
26 	DOpaque		= 0xFFFFFFFF,
27 	DTransparent	= 0x00000000,		/* only useful for allocimage, memfillcolor */
28 	DBlack		= 0x000000FF,
29 	DWhite		= 0xFFFFFFFF,
30 	DRed		= 0xFF0000FF,
31 	DGreen		= 0x00FF00FF,
32 	DBlue		= 0x0000FFFF,
33 	DCyan		= 0x00FFFFFF,
34 	DMagenta		= 0xFF00FFFF,
35 	DYellow		= 0xFFFF00FF,
36 	DPaleyellow	= 0xFFFFAAFF,
37 	DDarkyellow	= 0xEEEE9EFF,
38 	DDarkgreen	= 0x448844FF,
39 	DPalegreen	= 0xAAFFAAFF,
40 	DMedgreen	= 0x88CC88FF,
41 	DDarkblue	= 0x000055FF,
42 	DPalebluegreen= 0xAAFFFFFF,
43 	DPaleblue		= 0x0000BBFF,
44 	DBluegreen	= 0x008888FF,
45 	DGreygreen	= 0x55AAAAFF,
46 	DPalegreygreen	= 0x9EEEEEFF,
47 	DYellowgreen	= 0x99994CFF,
48 	DMedblue		= 0x000099FF,
49 	DGreyblue	= 0x005DBBFF,
50 	DPalegreyblue	= 0x4993DDFF,
51 	DPurpleblue	= 0x8888CCFF,
52 
53 	DNotacolor	= 0xFFFFFF00,
54 	DNofill		= DNotacolor,
55 	
56 };
57 
58 enum
59 {
60 	Displaybufsize	= 8000,
61 	ICOSSCALE	= 1024,
62 	Borderwidth =	4,
63 };
64 
65 enum
66 {
67 	/* refresh methods */
68 	Refbackup	= 0,
69 	Refnone		= 1,
70 	Refmesg		= 2
71 };
72 #define	NOREFRESH	((void*)-1)
73 
74 enum
75 {
76 	/* line ends */
77 	Endsquare	= 0,
78 	Enddisc		= 1,
79 	Endarrow	= 2,
80 	Endmask		= 0x1F
81 };
82 
83 #define	ARROW(a, b, c)	(Endarrow|((a)<<5)|((b)<<14)|((c)<<23))
84 
85 typedef enum
86 {
87 	/* Porter-Duff compositing operators */
88 	Clear	= 0,
89 
90 	SinD	= 8,
91 	DinS	= 4,
92 	SoutD	= 2,
93 	DoutS	= 1,
94 
95 	S		= SinD|SoutD,
96 	SoverD	= SinD|SoutD|DoutS,
97 	SatopD	= SinD|DoutS,
98 	SxorD	= SoutD|DoutS,
99 
100 	D		= DinS|DoutS,
101 	DoverS	= DinS|DoutS|SoutD,
102 	DatopS	= DinS|SoutD,
103 	DxorS	= DoutS|SoutD,	/* == SxorD */
104 
105 	Ncomp = 12,
106 } Drawop;
107 
108 /*
109  * image channel descriptors 
110  */
111 enum {
112 	CRed = 0,
113 	CGreen,
114 	CBlue,
115 	CGrey,
116 	CAlpha,
117 	CMap,
118 	CIgnore,
119 	NChan,
120 };
121 
122 #define __DC(type, nbits)	((((type)&15)<<4)|((nbits)&15))
123 #define CHAN1(a,b)	__DC(a,b)
124 #define CHAN2(a,b,c,d)	(CHAN1((a),(b))<<8|__DC((c),(d)))
125 #define CHAN3(a,b,c,d,e,f)	(CHAN2((a),(b),(c),(d))<<8|__DC((e),(f)))
126 #define CHAN4(a,b,c,d,e,f,g,h)	(CHAN3((a),(b),(c),(d),(e),(f))<<8|__DC((g),(h)))
127 
128 #define NBITS(c) ((c)&15)
129 #define TYPE(c) (((c)>>4)&15)
130 
131 enum {
132 	GREY1	= CHAN1(CGrey, 1),
133 	GREY2	= CHAN1(CGrey, 2),
134 	GREY4	= CHAN1(CGrey, 4),
135 	GREY8	= CHAN1(CGrey, 8),
136 	CMAP8	= CHAN1(CMap, 8),
137 	RGB15	= CHAN4(CIgnore, 1, CRed, 5, CGreen, 5, CBlue, 5),
138 	RGB16	= CHAN3(CRed, 5, CGreen, 6, CBlue, 5),
139 	RGB24	= CHAN3(CRed, 8, CGreen, 8, CBlue, 8),
140 	BGR24	= CHAN3(CBlue, 8, CGreen, 8, CRed, 8),
141 	RGBA32	= CHAN4(CRed, 8, CGreen, 8, CBlue, 8, CAlpha, 8),
142 	ARGB32	= CHAN4(CAlpha, 8, CRed, 8, CGreen, 8, CBlue, 8),	/* stupid VGAs */
143 	XRGB32  = CHAN4(CIgnore, 8, CRed, 8, CGreen, 8, CBlue, 8),
144 	XBGR32  = CHAN4(CIgnore, 8, CBlue, 8, CGreen, 8, CRed, 8),
145 };
146 
147 extern	char*	chantostr(char*, u32int);
148 extern	u32int	strtochan(char*);
149 extern	int		chantodepth(u32int);
150 
151 struct	Point
152 {
153 	int	x;
154 	int	y;
155 };
156 
157 struct Rectangle
158 {
159 	Point	min;
160 	Point	max;
161 };
162 
163 typedef void	(*Reffn)(Image*, Rectangle, void*);
164 
165 struct Screen
166 {
167 	Display	*display;	/* display holding data */
168 	int	id;		/* id of system-held Screen */
169 	Image	*image;		/* unused; for reference only */
170 	Image	*fill;		/* color to paint behind windows */
171 };
172 
173 struct Display
174 {
175 	QLock		qlock;
176 	int		locking;	/*program is using lockdisplay */
177 	int		dirno;
178 	int		imageid;
179 	int		local;
180 	void		(*error)(Display*, char*);
181 	char		*devdir;
182 	char		*windir;
183 	char		oldlabel[64];
184 	u32int		dataqid;
185 	Image		*image;
186 	Image		*white;
187 	Image		*black;
188 	Image		*opaque;
189 	Image		*transparent;
190 	uchar		*buf;
191 	int		bufsize;
192 	uchar		*bufp;
193 	uchar		*obuf;
194 	int		obufsize;
195 	uchar		*obufp;
196 	Font		*defaultfont;
197 	Subfont		*defaultsubfont;
198 	Image		*windows;
199 	Image		*screenimage;
200 	int		_isnewdisplay;
201 };
202 
203 struct Image
204 {
205 	Display		*display;	/* display holding data */
206 	int		id;		/* id of system-held Image */
207 	Rectangle	r;		/* rectangle in data area, local coords */
208 	Rectangle 	clipr;		/* clipping region */
209 	int		depth;		/* number of bits per pixel */
210 	u32int	chan;
211 	int		repl;		/* flag: data replicates to tile clipr */
212 	Screen		*screen;	/* 0 if not a window */
213 	Image		*next;	/* next in list of windows */
214 };
215 
216 struct RGB
217 {
218 	u32int	red;
219 	u32int	green;
220 	u32int	blue;
221 };
222 
223 /*
224  * Subfonts
225  *
226  * given char c, Subfont *f, Fontchar *i, and Point p, one says
227  *	i = f->info+c;
228  *	void(b, Rect(p.x+i->left, p.y+i->top,
229  *		p.x+i->left+((i+1)->x-i->x), p.y+i->bottom),
230  *		color, f->bits, Pt(i->x, i->top));
231  *	p.x += i->width;
232  * to draw characters in the specified color (itself an Image) in Image b.
233  */
234 
235 struct	Fontchar
236 {
237 	int		x;		/* left edge of bits */
238 	uchar		top;		/* first non-zero scan-line */
239 	uchar		bottom;		/* last non-zero scan-line + 1 */
240 	char		left;		/* offset of baseline */
241 	uchar		width;		/* width of baseline */
242 };
243 
244 struct	Subfont
245 {
246 	char		*name;
247 	short		n;		/* number of chars in font */
248 	uchar		height;		/* height of image */
249 	char		ascent;		/* top of image to baseline */
250 	Fontchar 	*info;		/* n+1 character descriptors */
251 	Image		*bits;		/* of font */
252 	int		ref;
253 };
254 
255 enum
256 {
257 	/* starting values */
258 	LOG2NFCACHE =	6,
259 	NFCACHE =	(1<<LOG2NFCACHE),	/* #chars cached */
260 	NFLOOK =	5,			/* #chars to scan in cache */
261 	NFSUBF =	2,			/* #subfonts to cache */
262 	/* max value */
263 	MAXFCACHE =	1024+NFLOOK,		/* upper limit */
264 	MAXSUBF =	50,			/* generous upper limit */
265 	/* deltas */
266 	DSUBF = 	4,
267 	/* expiry ages */
268 	SUBFAGE	=	10000,
269 	CACHEAGE =	10000
270 };
271 
272 struct Cachefont
273 {
274 	Rune		min;	/* lowest rune value to be taken from subfont */
275 	Rune		max;	/* highest rune value+1 to be taken from subfont */
276 	int		offset;	/* position in subfont of character at min */
277 	char		*name;			/* stored in font */
278 	char		*subfontname;		/* to access subfont */
279 };
280 
281 struct Cacheinfo
282 {
283 	ushort		x;		/* left edge of bits */
284 	uchar		width;		/* width of baseline */
285 	schar		left;		/* offset of baseline */
286 	Rune		value;	/* value of character at this slot in cache */
287 	ushort		age;
288 };
289 
290 struct Cachesubf
291 {
292 	u32int		age;	/* for replacement */
293 	Cachefont	*cf;	/* font info that owns us */
294 	Subfont		*f;	/* attached subfont */
295 };
296 
297 struct Font
298 {
299 	char		*name;
300 	Display		*display;
301 	short		height;	/* max height of image, interline spacing */
302 	short		ascent;	/* top of image to baseline */
303 	short		width;	/* widest so far; used in caching only */	
304 	short		nsub;	/* number of subfonts */
305 	u32int		age;	/* increasing counter; used for LRU */
306 	int		maxdepth;	/* maximum depth of all loaded subfonts */
307 	int		ncache;	/* size of cache */
308 	int		nsubf;	/* size of subfont list */
309 	Cacheinfo	*cache;
310 	Cachesubf	*subf;
311 	Cachefont	**sub;	/* as read from file */
312 	Image		*cacheimage;
313 };
314 
315 #define	Dx(r)	((r).max.x-(r).min.x)
316 #define	Dy(r)	((r).max.y-(r).min.y)
317 
318 /*
319  * Image management
320  */
321 extern Image*	_allocimage(Image*, Display*, Rectangle, u32int, int, u32int, int, int);
322 extern Image*	allocimage(Display*, Rectangle, u32int, int, u32int);
323 extern uchar*	bufimage(Display*, int);
324 extern int	bytesperline(Rectangle, int);
325 extern void	closedisplay(Display*);
326 extern void	drawerror(Display*, char*);
327 extern int	flushimage(Display*, int);
328 extern int	freeimage(Image*);
329 extern int	_freeimage1(Image*);
330 extern int	geninitdraw(char*, void(*)(Display*, char*), char*, char*, char*, int);
331 extern int	initdraw(void(*)(Display*, char*), char*, char*);
332 extern int	newwindow(char*);
333 extern int	loadimage(Image*, Rectangle, uchar*, int);
334 extern int	cloadimage(Image*, Rectangle, uchar*, int);
335 extern int	getwindow(Display*, int);
336 extern int	gengetwindow(Display*, char*, Image**, Screen**, int);
337 extern Image* readimage(Display*, int, int);
338 extern Image* creadimage(Display*, int, int);
339 extern int	unloadimage(Image*, Rectangle, uchar*, int);
340 extern int	wordsperline(Rectangle, int);
341 extern int	writeimage(int, Image*, int);
342 extern Image*	namedimage(Display*, char*);
343 extern int	nameimage(Image*, char*, int);
344 extern Image* allocimagemix(Display*, u32int, u32int);
345 extern int	drawsetlabel(Display*, char*);
346 
347 /*
348  * Colors
349  */
350 extern	void	readcolmap(Display*, RGB*);
351 extern	void	writecolmap(Display*, RGB*);
352 extern	u32int	setalpha(u32int, uchar);
353 
354 /*
355  * Windows
356  */
357 extern Screen*	allocscreen(Image*, Image*, int);
358 extern Image*	_allocwindow(Image*, Screen*, Rectangle, int, u32int);
359 extern Image*	allocwindow(Screen*, Rectangle, int, u32int);
360 extern void	bottomnwindows(Image**, int);
361 extern void	bottomwindow(Image*);
362 extern int	freescreen(Screen*);
363 extern Screen*	publicscreen(Display*, int, u32int);
364 extern void	topnwindows(Image**, int);
365 extern void	topwindow(Image*);
366 extern int	originwindow(Image*, Point, Point);
367 
368 /*
369  * Geometry
370  */
371 extern Point		Pt(int, int);
372 extern Rectangle	Rect(int, int, int, int);
373 extern Rectangle	Rpt(Point, Point);
374 extern Point		addpt(Point, Point);
375 extern Point		subpt(Point, Point);
376 extern Point		divpt(Point, int);
377 extern Point		mulpt(Point, int);
378 extern int		eqpt(Point, Point);
379 extern int		eqrect(Rectangle, Rectangle);
380 extern Rectangle	insetrect(Rectangle, int);
381 extern Rectangle	rectaddpt(Rectangle, Point);
382 extern Rectangle	rectsubpt(Rectangle, Point);
383 extern Rectangle	canonrect(Rectangle);
384 extern int		rectXrect(Rectangle, Rectangle);
385 extern int		rectinrect(Rectangle, Rectangle);
386 extern void		combinerect(Rectangle*, Rectangle);
387 extern int		rectclip(Rectangle*, Rectangle);
388 extern int		ptinrect(Point, Rectangle);
389 extern void		replclipr(Image*, int, Rectangle);
390 extern int		drawreplxy(int, int, int);	/* used to be drawsetxy */
391 extern Point	drawrepl(Rectangle, Point);
392 extern int		rgb2cmap(int, int, int);
393 extern int		cmap2rgb(int);
394 extern int		cmap2rgba(int);
395 extern void		icossin(int, int*, int*);
396 extern void		icossin2(int, int, int*, int*);
397 
398 /*
399  * Graphics
400  */
401 extern void	draw(Image*, Rectangle, Image*, Image*, Point);
402 extern void	drawop(Image*, Rectangle, Image*, Image*, Point, Drawop);
403 extern void	gendraw(Image*, Rectangle, Image*, Point, Image*, Point);
404 extern void	gendrawop(Image*, Rectangle, Image*, Point, Image*, Point, Drawop);
405 extern void	line(Image*, Point, Point, int, int, int, Image*, Point);
406 extern void	lineop(Image*, Point, Point, int, int, int, Image*, Point, Drawop);
407 extern void	poly(Image*, Point*, int, int, int, int, Image*, Point);
408 extern void	polyop(Image*, Point*, int, int, int, int, Image*, Point, Drawop);
409 extern void	fillpoly(Image*, Point*, int, int, Image*, Point);
410 extern void	fillpolyop(Image*, Point*, int, int, Image*, Point, Drawop);
411 extern Point	string(Image*, Point, Image*, Point, Font*, char*);
412 extern Point	stringop(Image*, Point, Image*, Point, Font*, char*, Drawop);
413 extern Point	stringn(Image*, Point, Image*, Point, Font*, char*, int);
414 extern Point	stringnop(Image*, Point, Image*, Point, Font*, char*, int, Drawop);
415 extern Point	runestring(Image*, Point, Image*, Point, Font*, Rune*);
416 extern Point	runestringop(Image*, Point, Image*, Point, Font*, Rune*, Drawop);
417 extern Point	runestringn(Image*, Point, Image*, Point, Font*, Rune*, int);
418 extern Point	runestringnop(Image*, Point, Image*, Point, Font*, Rune*, int, Drawop);
419 extern Point	stringbg(Image*, Point, Image*, Point, Font*, char*, Image*, Point);
420 extern Point	stringbgop(Image*, Point, Image*, Point, Font*, char*, Image*, Point, Drawop);
421 extern Point	stringnbg(Image*, Point, Image*, Point, Font*, char*, int, Image*, Point);
422 extern Point	stringnbgop(Image*, Point, Image*, Point, Font*, char*, int, Image*, Point, Drawop);
423 extern Point	runestringbg(Image*, Point, Image*, Point, Font*, Rune*, Image*, Point);
424 extern Point	runestringbgop(Image*, Point, Image*, Point, Font*, Rune*, Image*, Point, Drawop);
425 extern Point	runestringnbg(Image*, Point, Image*, Point, Font*, Rune*, int, Image*, Point);
426 extern Point	runestringnbgop(Image*, Point, Image*, Point, Font*, Rune*, int, Image*, Point, Drawop);
427 extern Point	_string(Image*, Point, Image*, Point, Font*, char*, Rune*, int, Rectangle, Image*, Point, Drawop);
428 extern Point	stringsubfont(Image*, Point, Image*, Subfont*, char*);
429 extern int		bezier(Image*, Point, Point, Point, Point, int, int, int, Image*, Point);
430 extern int		bezierop(Image*, Point, Point, Point, Point, int, int, int, Image*, Point, Drawop);
431 extern int		bezspline(Image*, Point*, int, int, int, int, Image*, Point);
432 extern int		bezsplineop(Image*, Point*, int, int, int, int, Image*, Point, Drawop);
433 extern int		bezsplinepts(Point*, int, Point**);
434 extern int		fillbezier(Image*, Point, Point, Point, Point, int, Image*, Point);
435 extern int		fillbezierop(Image*, Point, Point, Point, Point, int, Image*, Point, Drawop);
436 extern int		fillbezspline(Image*, Point*, int, int, Image*, Point);
437 extern int		fillbezsplineop(Image*, Point*, int, int, Image*, Point, Drawop);
438 extern void	ellipse(Image*, Point, int, int, int, Image*, Point);
439 extern void	ellipseop(Image*, Point, int, int, int, Image*, Point, Drawop);
440 extern void	fillellipse(Image*, Point, int, int, Image*, Point);
441 extern void	fillellipseop(Image*, Point, int, int, Image*, Point, Drawop);
442 extern void	arc(Image*, Point, int, int, int, Image*, Point, int, int);
443 extern void	arcop(Image*, Point, int, int, int, Image*, Point, int, int, Drawop);
444 extern void	fillarc(Image*, Point, int, int, Image*, Point, int, int);
445 extern void	fillarcop(Image*, Point, int, int, Image*, Point, int, int, Drawop);
446 extern void	border(Image*, Rectangle, int, Image*, Point);
447 extern void	borderop(Image*, Rectangle, int, Image*, Point, Drawop);
448 
449 /*
450  * Font management
451  */
452 extern Font*	openfont(Display*, char*);
453 extern Font*	buildfont(Display*, char*, char*);
454 extern void	freefont(Font*);
455 extern Font*	mkfont(Subfont*, Rune);
456 extern int	cachechars(Font*, char**, Rune**, ushort*, int, int*, char**);
457 extern void	agefont(Font*);
458 extern Subfont*	allocsubfont(char*, int, int, int, Fontchar*, Image*);
459 extern Subfont*	lookupsubfont(Display*, char*);
460 extern void	installsubfont(char*, Subfont*);
461 extern void	uninstallsubfont(Subfont*);
462 extern void	freesubfont(Subfont*);
463 extern Subfont*	readsubfont(Display*, char*, int, int);
464 extern Subfont*	readsubfonti(Display*, char*, int, Image*, int);
465 extern int	writesubfont(int, Subfont*);
466 extern void	_unpackinfo(Fontchar*, uchar*, int);
467 extern Point	stringsize(Font*, char*);
468 extern int	stringwidth(Font*, char*);
469 extern int	stringnwidth(Font*, char*, int);
470 extern Point	runestringsize(Font*, Rune*);
471 extern int	runestringwidth(Font*, Rune*);
472 extern int	runestringnwidth(Font*, Rune*, int);
473 extern Point	strsubfontwidth(Subfont*, char*);
474 extern int	loadchar(Font*, Rune, Cacheinfo*, int, int, char**);
475 extern char*	subfontname(char*, char*, int);
476 extern Subfont*	_getsubfont(Display*, char*);
477 extern Subfont*	getdefont(Display*);
478 extern void		lockdisplay(Display*);
479 extern void	unlockdisplay(Display*);
480 extern int		drawlsetrefresh(u32int, int, void*, void*);
481 
482 /*
483  * Predefined 
484  */
485 extern	uchar	defontdata[];
486 extern	int		sizeofdefont;
487 extern	Point		ZP;
488 extern	Rectangle	ZR;
489 
490 /*
491  * Set up by initdraw()
492  */
493 extern	Display	*display;
494 extern	Font		*font;
495 extern	Image	*screen;
496 extern	Screen	*_screen;
497 extern	int	_cursorfd;
498 extern	int	_drawdebug;	/* set to 1 to see errors from flushimage */
499 extern	void	_setdrawop(Display*, Drawop);
500 extern	Display	*_initdisplay(void(*)(Display*,char*), char*);
501 
502 #define	BGSHORT(p)		(((p)[0]<<0) | ((p)[1]<<8))
503 #define	BGLONG(p)		((BGSHORT(p)<<0) | (BGSHORT(p+2)<<16))
504 #define	BPSHORT(p, v)		((p)[0]=(v), (p)[1]=((v)>>8))
505 #define	BPLONG(p, v)		(BPSHORT(p, (v)), BPSHORT(p+2, (v)>>16))
506 
507 /*
508  * Compressed image file parameters and helper routines
509  */
510 #define	NMATCH	3		/* shortest match possible */
511 #define	NRUN	(NMATCH+31)	/* longest match possible */
512 #define	NMEM	1024		/* window size */
513 #define	NDUMP	128		/* maximum length of dump */
514 #define	NCBLOCK	6000		/* size of compressed blocks */
515 extern	void	_twiddlecompressed(uchar*, int);
516 extern	int	_compblocksize(Rectangle, int);
517 
518 /* XXX backwards helps; should go */
519 extern	u32int	drawld2chan[];
520 extern	void		drawsetdebug(int);
521 
522 /*
523  * Snarf buffer
524  */
525 enum
526 {
527 	SnarfSize = 64*1024,
528 };
529 char *getsnarf(void);
530 void putsnarf(char*);
531 
532 void drawtopwindow(void);
533 
534 /*
535  * Port magic.
536  */
537 int	_drawmsgread(Display*, void*, int);
538 int	_drawmsgwrite(Display*, void*, int);
539 int	_latin1(Rune*, int);
540 
541 #if defined(__cplusplus)
542 }
543 #endif
544 #endif