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