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