1 #ifndef _DRAW_H_
2 #define _DRAW_H_ 1
3 #if defined(__cplusplus)
4 extern "C" { 
5 #endif
6 
7 AUTOLIB(draw)
8 #ifdef __APPLE__
9 AUTOFRAMEWORK(Carbon)
10 #endif
11 
12 typedef struct	Cachefont Cachefont;
13 typedef struct	Cacheinfo Cacheinfo;
14 typedef struct	Cachesubf Cachesubf;
15 typedef struct	Display Display;
16 typedef struct	Font Font;
17 typedef struct	Fontchar Fontchar;
18 typedef struct	Image Image;
19 typedef struct	Mouse Mouse;
20 typedef struct	Point Point;
21 typedef struct	Rectangle Rectangle;
22 typedef struct	RGB RGB;
23 typedef struct	Screen Screen;
24 typedef struct	Subfont Subfont;
25 
26 extern	int	Rfmt(Fmt*);
27 extern	int	Pfmt(Fmt*);
28 
29 #define 	DOpaque		0xFFFFFFFF
30 #define 	DTransparent	0x00000000		/* only useful for allocimage memfillcolor */
31 #define 	DBlack		0x000000FF
32 #define 	DWhite		0xFFFFFFFF
33 #define 	DRed		0xFF0000FF
34 #define 	DGreen		0x00FF00FF
35 #define 	DBlue		0x0000FFFF
36 #define 	DCyan		0x00FFFFFF
37 #define 	DMagenta		0xFF00FFFF
38 #define 	DYellow		0xFFFF00FF
39 #define 	DPaleyellow	0xFFFFAAFF
40 #define 	DDarkyellow	0xEEEE9EFF
41 #define 	DDarkgreen	0x448844FF
42 #define 	DPalegreen	0xAAFFAAFF
43 #define 	DMedgreen	0x88CC88FF
44 #define 	DDarkblue	0x000055FF
45 #define 	DPalebluegreen 0xAAFFFFFF
46 #define 	DPaleblue		0x0000BBFF
47 #define 	DBluegreen	0x008888FF
48 #define 	DGreygreen	0x55AAAAFF
49 #define 	DPalegreygreen	0x9EEEEEFF
50 #define 	DYellowgreen	0x99994CFF
51 #define 	DMedblue		0x000099FF
52 #define 	DGreyblue	0x005DBBFF
53 #define 	DPalegreyblue	0x4993DDFF
54 #define 	DPurpleblue	0x8888CCFF
55 
56 #define 	DNotacolor	0xFFFFFF00
57 #define 	DNofill		DNotacolor
58 
59 enum
60 {
61 	Displaybufsize	= 8000,
62 	ICOSSCALE	= 1024,
63 	Borderwidth =	4
64 };
65 
66 enum
67 {
68 	/* refresh methods */
69 	Refbackup	= 0,
70 	Refnone		= 1,
71 	Refmesg		= 2
72 };
73 #define	NOREFRESH	((void*)-1)
74 
75 enum
76 {
77 	/* line ends */
78 	Endsquare	= 0,
79 	Enddisc		= 1,
80 	Endarrow	= 2,
81 	Endmask		= 0x1F
82 };
83 
84 #define	ARROW(a, b, c)	(Endarrow|((a)<<5)|((b)<<14)|((c)<<23))
85 
86 typedef enum
87 {
88 	/* Porter-Duff compositing operators */
89 	Clear	= 0,
90 
91 	SinD	= 8,
92 	DinS	= 4,
93 	SoutD	= 2,
94 	DoutS	= 1,
95 
96 	S		= SinD|SoutD,
97 	SoverD	= SinD|SoutD|DoutS,
98 	SatopD	= SinD|DoutS,
99 	SxorD	= SoutD|DoutS,
100 
101 	D		= DinS|DoutS,
102 	DoverS	= DinS|DoutS|SoutD,
103 	DatopS	= DinS|SoutD,
104 	DxorS	= DoutS|SoutD,	/* == SxorD */
105 
106 	Ncomp = 12
107 } Drawop;
108 
109 /*
110  * image channel descriptors 
111  */
112 enum {
113 	CRed = 0,
114 	CGreen,
115 	CBlue,
116 	CGrey,
117 	CAlpha,
118 	CMap,
119 	CIgnore,
120 	NChan
121 };
122 
123 #define __DC(type, nbits)	((((type)&15)<<4)|((nbits)&15))
124 #define CHAN1(a,b)	__DC(a,b)
125 #define CHAN2(a,b,c,d)	(CHAN1((a),(b))<<8|__DC((c),(d)))
126 #define CHAN3(a,b,c,d,e,f)	(CHAN2((a),(b),(c),(d))<<8|__DC((e),(f)))
127 #define CHAN4(a,b,c,d,e,f,g,h)	(CHAN3((a),(b),(c),(d),(e),(f))<<8|__DC((g),(h)))
128 
129 #define NBITS(c) ((c)&15)
130 #define TYPE(c) (((c)>>4)&15)
131 
132 enum {
133 	GREY1	= CHAN1(CGrey, 1),
134 	GREY2	= CHAN1(CGrey, 2),
135 	GREY4	= CHAN1(CGrey, 4),
136 	GREY8	= CHAN1(CGrey, 8),
137 	CMAP8	= CHAN1(CMap, 8),
138 	RGB15	= CHAN4(CIgnore, 1, CRed, 5, CGreen, 5, CBlue, 5),
139 	RGB16	= CHAN3(CRed, 5, CGreen, 6, CBlue, 5),
140 	RGB24	= CHAN3(CRed, 8, CGreen, 8, CBlue, 8),
141 	BGR24	= CHAN3(CBlue, 8, CGreen, 8, CRed, 8),
142 	RGBA32	= CHAN4(CRed, 8, CGreen, 8, CBlue, 8, CAlpha, 8),
143 	ARGB32	= CHAN4(CAlpha, 8, CRed, 8, CGreen, 8, CBlue, 8),	/* stupid VGAs */
144 	ABGR32	= CHAN4(CAlpha, 8, CBlue, 8, CGreen, 8, CRed, 8),
145 	XRGB32  = CHAN4(CIgnore, 8, CRed, 8, CGreen, 8, CBlue, 8),
146 	XBGR32  = CHAN4(CIgnore, 8, CBlue, 8, CGreen, 8, CRed, 8)
147 };
148 
149 extern	char*	chantostr(char*, u32int);
150 extern	u32int	strtochan(char*);
151 extern	int		chantodepth(u32int);
152 
153 struct	Point
154 {
155 	int	x;
156 	int	y;
157 };
158 
159 struct Rectangle
160 {
161 	Point	min;
162 	Point	max;
163 };
164 
165 typedef void	(*Reffn)(Image*, Rectangle, void*);
166 
167 struct Screen
168 {
169 	Display	*display;	/* display holding data */
170 	int	id;		/* id of system-held Screen */
171 	Image	*image;		/* unused; for reference only */
172 	Image	*fill;		/* color to paint behind windows */
173 };
174 
175 struct Display
176 {
177 	QLock		qlock;
178 	int		locking;	/*program is using lockdisplay */
179 	int		dirno;
180 	int		imageid;
181 	int		local;
182 	void		(*error)(Display*, char*);
183 	char		*devdir;
184 	char		*windir;
185 	char		oldlabel[64];
186 	u32int		dataqid;
187 	Image		*image;
188 	Image		*white;
189 	Image		*black;
190 	Image		*opaque;
191 	Image		*transparent;
192 	uchar		*buf;
193 	int		bufsize;
194 	uchar		*bufp;
195 	uchar		*obuf;
196 	int		obufsize;
197 	uchar		*obufp;
198 	Font		*defaultfont;
199 	Subfont		*defaultsubfont;
200 	Image		*windows;
201 	Image		*screenimage;
202 	int		_isnewdisplay;
203 };
204 
205 struct Image
206 {
207 	Display		*display;	/* display holding data */
208 	int		id;		/* id of system-held Image */
209 	Rectangle	r;		/* rectangle in data area, local coords */
210 	Rectangle 	clipr;		/* clipping region */
211 	int		depth;		/* number of bits per pixel */
212 	u32int	chan;
213 	int		repl;		/* flag: data replicates to tile clipr */
214 	Screen		*screen;	/* 0 if not a window */
215 	Image		*next;	/* next in list of windows */
216 };
217 
218 struct RGB
219 {
220 	u32int	red;
221 	u32int	green;
222 	u32int	blue;
223 };
224 
225 /*
226  * Subfonts
227  *
228  * given char c, Subfont *f, Fontchar *i, and Point p, one says
229  *	i = f->info+c;
230  *	void(b, Rect(p.x+i->left, p.y+i->top,
231  *		p.x+i->left+((i+1)->x-i->x), p.y+i->bottom),
232  *		color, f->bits, Pt(i->x, i->top));
233  *	p.x += i->width;
234  * to draw characters in the specified color (itself an Image) in Image b.
235  */
236 
237 struct	Fontchar
238 {
239 	int		x;		/* left edge of bits */
240 	uchar		top;		/* first non-zero scan-line */
241 	uchar		bottom;		/* last non-zero scan-line + 1 */
242 	char		left;		/* offset of baseline */
243 	uchar		width;		/* width of baseline */
244 };
245 
246 struct	Subfont
247 {
248 	char		*name;
249 	short		n;		/* number of chars in font */
250 	uchar		height;		/* height of image */
251 	char		ascent;		/* top of image to baseline */
252 	Fontchar 	*info;		/* n+1 character descriptors */
253 	Image		*bits;		/* of font */
254 	int		ref;
255 };
256 
257 enum
258 {
259 	/* starting values */
260 	LOG2NFCACHE =	6,
261 	NFCACHE =	(1<<LOG2NFCACHE),	/* #chars cached */
262 	NFLOOK =	5,			/* #chars to scan in cache */
263 	NFSUBF =	2,			/* #subfonts to cache */
264 	/* max value */
265 	MAXFCACHE =	1024+NFLOOK,		/* upper limit */
266 	MAXSUBF =	50,			/* generous upper limit */
267 	/* deltas */
268 	DSUBF = 	4,
269 	/* expiry ages */
270 	SUBFAGE	=	10000,
271 	CACHEAGE =	10000
272 };
273 
274 struct Cachefont
275 {
276 	Rune		min;	/* lowest rune value to be taken from subfont */
277 	Rune		max;	/* highest rune value+1 to be taken from subfont */
278 	int		offset;	/* position in subfont of character at min */
279 	char		*name;			/* stored in font */
280 	char		*subfontname;		/* to access subfont */
281 };
282 
283 struct Cacheinfo
284 {
285 	ushort		x;		/* left edge of bits */
286 	uchar		width;		/* width of baseline */
287 	schar		left;		/* offset of baseline */
288 	Rune		value;	/* value of character at this slot in cache */
289 	ushort		age;
290 };
291 
292 struct Cachesubf
293 {
294 	u32int		age;	/* for replacement */
295 	Cachefont	*cf;	/* font info that owns us */
296 	Subfont		*f;	/* attached subfont */
297 };
298 
299 struct Font
300 {
301 	char		*name;
302 	Display		*display;
303 	short		height;	/* max height of image, interline spacing */
304 	short		ascent;	/* top of image to baseline */
305 	short		width;	/* widest so far; used in caching only */	
306 	short		nsub;	/* number of subfonts */
307 	u32int		age;	/* increasing counter; used for LRU */
308 	int		maxdepth;	/* maximum depth of all loaded subfonts */
309 	int		ncache;	/* size of cache */
310 	int		nsubf;	/* size of subfont list */
311 	Cacheinfo	*cache;
312 	Cachesubf	*subf;
313 	Cachefont	**sub;	/* as read from file */
314 	Image		*cacheimage;
315 };
316 
317 #define	Dx(r)	((r).max.x-(r).min.x)
318 #define	Dy(r)	((r).max.y-(r).min.y)
319 
320 /*
321  * Image management
322  */
323 extern Image*	_allocimage(Image*, Display*, Rectangle, u32int, int, u32int, int, int);
324 extern Image*	allocimage(Display*, Rectangle, u32int, int, u32int);
325 extern uchar*	bufimage(Display*, int);
326 extern int	bytesperline(Rectangle, int);
327 extern void	closedisplay(Display*);
328 extern void	drawerror(Display*, char*);
329 extern int	flushimage(Display*, int);
330 extern int	freeimage(Image*);
331 extern int	_freeimage1(Image*);
332 extern int	geninitdraw(char*, void(*)(Display*, char*), char*, char*, char*, int);
333 extern int	initdraw(void(*)(Display*, char*), char*, char*);
334 extern int	newwindow(char*);
335 extern int	loadimage(Image*, Rectangle, uchar*, int);
336 extern int	cloadimage(Image*, Rectangle, uchar*, int);
337 extern int	getwindow(Display*, int);
338 extern int	gengetwindow(Display*, char*, Image**, Screen**, int);
339 extern Image* readimage(Display*, int, int);
340 extern Image* creadimage(Display*, int, int);
341 extern int	unloadimage(Image*, Rectangle, uchar*, int);
342 extern int	wordsperline(Rectangle, int);
343 extern int	writeimage(int, Image*, int);
344 extern Image*	namedimage(Display*, char*);
345 extern int	nameimage(Image*, char*, int);
346 extern Image* allocimagemix(Display*, u32int, u32int);
347 extern int	drawsetlabel(char*);
348 
349 /*
350  * Colors
351  */
352 extern	void	readcolmap(Display*, RGB*);
353 extern	void	writecolmap(Display*, RGB*);
354 extern	u32int	setalpha(u32int, uchar);
355 
356 /*
357  * Windows
358  */
359 extern Screen*	allocscreen(Image*, Image*, int);
360 extern Image*	_allocwindow(Image*, Screen*, Rectangle, int, u32int);
361 extern Image*	allocwindow(Screen*, Rectangle, int, u32int);
362 extern void	bottomnwindows(Image**, int);
363 extern void	bottomwindow(Image*);
364 extern int	freescreen(Screen*);
365 extern Screen*	publicscreen(Display*, int, u32int);
366 extern void	topnwindows(Image**, int);
367 extern void	topwindow(Image*);
368 extern int	originwindow(Image*, Point, Point);
369 
370 /*
371  * Geometry
372  */
373 extern Point		Pt(int, int);
374 extern Rectangle	Rect(int, int, int, int);
375 extern Rectangle	Rpt(Point, Point);
376 extern Point		addpt(Point, Point);
377 extern Point		subpt(Point, Point);
378 extern Point		divpt(Point, int);
379 extern Point		mulpt(Point, int);
380 extern int		eqpt(Point, Point);
381 extern int		eqrect(Rectangle, Rectangle);
382 extern Rectangle	insetrect(Rectangle, int);
383 extern Rectangle	rectaddpt(Rectangle, Point);
384 extern Rectangle	rectsubpt(Rectangle, Point);
385 extern Rectangle	canonrect(Rectangle);
386 extern int		rectXrect(Rectangle, Rectangle);
387 extern int		rectinrect(Rectangle, Rectangle);
388 extern void		combinerect(Rectangle*, Rectangle);
389 extern int		rectclip(Rectangle*, Rectangle);
390 extern int		ptinrect(Point, Rectangle);
391 extern void		replclipr(Image*, int, Rectangle);
392 extern int		drawreplxy(int, int, int);	/* used to be drawsetxy */
393 extern Point	drawrepl(Rectangle, Point);
394 extern int		rgb2cmap(int, int, int);
395 extern int		cmap2rgb(int);
396 extern int		cmap2rgba(int);
397 extern void		icossin(int, int*, int*);
398 extern void		icossin2(int, int, int*, int*);
399 
400 /*
401  * Graphics
402  */
403 extern void	draw(Image*, Rectangle, Image*, Image*, Point);
404 extern void	drawop(Image*, Rectangle, Image*, Image*, Point, Drawop);
405 extern void	gendraw(Image*, Rectangle, Image*, Point, Image*, Point);
406 extern void	gendrawop(Image*, Rectangle, Image*, Point, Image*, Point, Drawop);
407 extern void	line(Image*, Point, Point, int, int, int, Image*, Point);
408 extern void	lineop(Image*, Point, Point, int, int, int, Image*, Point, Drawop);
409 extern void	poly(Image*, Point*, int, int, int, int, Image*, Point);
410 extern void	polyop(Image*, Point*, int, int, int, int, Image*, Point, Drawop);
411 extern void	fillpoly(Image*, Point*, int, int, Image*, Point);
412 extern void	fillpolyop(Image*, Point*, int, int, Image*, Point, Drawop);
413 extern Point	string(Image*, Point, Image*, Point, Font*, char*);
414 extern Point	stringop(Image*, Point, Image*, Point, Font*, char*, Drawop);
415 extern Point	stringn(Image*, Point, Image*, Point, Font*, char*, int);
416 extern Point	stringnop(Image*, Point, Image*, Point, Font*, char*, int, Drawop);
417 extern Point	runestring(Image*, Point, Image*, Point, Font*, Rune*);
418 extern Point	runestringop(Image*, Point, Image*, Point, Font*, Rune*, Drawop);
419 extern Point	runestringn(Image*, Point, Image*, Point, Font*, Rune*, int);
420 extern Point	runestringnop(Image*, Point, Image*, Point, Font*, Rune*, int, Drawop);
421 extern Point	stringbg(Image*, Point, Image*, Point, Font*, char*, Image*, Point);
422 extern Point	stringbgop(Image*, Point, Image*, Point, Font*, char*, Image*, Point, Drawop);
423 extern Point	stringnbg(Image*, Point, Image*, Point, Font*, char*, int, Image*, Point);
424 extern Point	stringnbgop(Image*, Point, Image*, Point, Font*, char*, int, Image*, Point, Drawop);
425 extern Point	runestringbg(Image*, Point, Image*, Point, Font*, Rune*, Image*, Point);
426 extern Point	runestringbgop(Image*, Point, Image*, Point, Font*, Rune*, Image*, Point, Drawop);
427 extern Point	runestringnbg(Image*, Point, Image*, Point, Font*, Rune*, int, Image*, Point);
428 extern Point	runestringnbgop(Image*, Point, Image*, Point, Font*, Rune*, int, Image*, Point, Drawop);
429 extern Point	_string(Image*, Point, Image*, Point, Font*, char*, Rune*, int, Rectangle, Image*, Point, Drawop);
430 extern Point	stringsubfont(Image*, Point, Image*, Subfont*, char*);
431 extern int		bezier(Image*, Point, Point, Point, Point, int, int, int, Image*, Point);
432 extern int		bezierop(Image*, Point, Point, Point, Point, int, int, int, Image*, Point, Drawop);
433 extern int		bezspline(Image*, Point*, int, int, int, int, Image*, Point);
434 extern int		bezsplineop(Image*, Point*, int, int, int, int, Image*, Point, Drawop);
435 extern int		bezsplinepts(Point*, int, Point**);
436 extern int		fillbezier(Image*, Point, Point, Point, Point, int, Image*, Point);
437 extern int		fillbezierop(Image*, Point, Point, Point, Point, int, Image*, Point, Drawop);
438 extern int		fillbezspline(Image*, Point*, int, int, Image*, Point);
439 extern int		fillbezsplineop(Image*, Point*, int, int, Image*, Point, Drawop);
440 extern void	ellipse(Image*, Point, int, int, int, Image*, Point);
441 extern void	ellipseop(Image*, Point, int, int, int, Image*, Point, Drawop);
442 extern void	fillellipse(Image*, Point, int, int, Image*, Point);
443 extern void	fillellipseop(Image*, Point, int, int, Image*, Point, Drawop);
444 extern void	arc(Image*, Point, int, int, int, Image*, Point, int, int);
445 extern void	arcop(Image*, Point, int, int, int, Image*, Point, int, int, Drawop);
446 extern void	fillarc(Image*, Point, int, int, Image*, Point, int, int);
447 extern void	fillarcop(Image*, Point, int, int, Image*, Point, int, int, Drawop);
448 extern void	border(Image*, Rectangle, int, Image*, Point);
449 extern void	borderop(Image*, Rectangle, int, Image*, Point, Drawop);
450 
451 /*
452  * Font management
453  */
454 extern Font*	openfont(Display*, char*);
455 extern Font*	buildfont(Display*, char*, char*);
456 extern void	freefont(Font*);
457 extern Font*	mkfont(Subfont*, Rune);
458 extern int	cachechars(Font*, char**, Rune**, ushort*, int, int*, char**);
459 extern void	agefont(Font*);
460 extern Subfont*	allocsubfont(char*, int, int, int, Fontchar*, Image*);
461 extern Subfont*	lookupsubfont(Display*, char*);
462 extern void	installsubfont(char*, Subfont*);
463 extern void	uninstallsubfont(Subfont*);
464 extern void	freesubfont(Subfont*);
465 extern Subfont*	readsubfont(Display*, char*, int, int);
466 extern Subfont*	readsubfonti(Display*, char*, int, Image*, int);
467 extern int	writesubfont(int, Subfont*);
468 extern void	_unpackinfo(Fontchar*, uchar*, int);
469 extern Point	stringsize(Font*, char*);
470 extern int	stringwidth(Font*, char*);
471 extern int	stringnwidth(Font*, char*, int);
472 extern Point	runestringsize(Font*, Rune*);
473 extern int	runestringwidth(Font*, Rune*);
474 extern int	runestringnwidth(Font*, Rune*, int);
475 extern Point	strsubfontwidth(Subfont*, char*);
476 extern int	loadchar(Font*, Rune, Cacheinfo*, int, int, char**);
477 extern char*	subfontname(char*, char*, int);
478 extern Subfont*	_getsubfont(Display*, char*);
479 extern Subfont*	getdefont(Display*);
480 extern void		lockdisplay(Display*);
481 extern void	unlockdisplay(Display*);
482 extern int		drawlsetrefresh(u32int, int, void*, void*);
483 
484 /*
485  * Predefined 
486  */
487 extern	uchar	defontdata[];
488 extern	int		sizeofdefont;
489 extern	Point		ZP;
490 extern	Rectangle	ZR;
491 
492 /*
493  * Set up by initdraw()
494  */
495 extern	Display	*display;
496 extern	Font		*font;
497 extern	Image	*screen;
498 extern	Screen	*_screen;
499 extern	int	_cursorfd;
500 extern	int	_drawdebug;	/* set to 1 to see errors from flushimage */
501 extern	void	_setdrawop(Display*, Drawop);
502 extern	Display	*_initdisplay(void(*)(Display*,char*), char*);
503 
504 #define	BGSHORT(p)		(((p)[0]<<0) | ((p)[1]<<8))
505 #define	BGLONG(p)		((BGSHORT(p)<<0) | (BGSHORT(p+2)<<16))
506 #define	BPSHORT(p, v)		((p)[0]=(v), (p)[1]=((v)>>8))
507 #define	BPLONG(p, v)		(BPSHORT(p, (v)), BPSHORT(p+2, (v)>>16))
508 
509 /*
510  * Compressed image file parameters and helper routines
511  */
512 #define	NMATCH	3		/* shortest match possible */
513 #define	NRUN	(NMATCH+31)	/* longest match possible */
514 #define	NMEM	1024		/* window size */
515 #define	NDUMP	128		/* maximum length of dump */
516 #define	NCBLOCK	6000		/* size of compressed blocks */
517 extern	void	_twiddlecompressed(uchar*, int);
518 extern	int	_compblocksize(Rectangle, int);
519 
520 /* XXX backwards helps; should go */
521 extern	u32int	drawld2chan[];
522 extern	void		drawsetdebug(int);
523 
524 /*
525  * Snarf buffer
526  */
527 enum
528 {
529 	SnarfSize = 64*1024
530 };
531 char *getsnarf(void);
532 void putsnarf(char*);
533 
534 void drawtopwindow(void);
535 void drawresizewindow(Rectangle);
536 extern char *winsize;
537 
538 /*
539  * Port magic.
540  */
541 int	_drawmsgread(Display*, void*, int);
542 int	_drawmsgwrite(Display*, void*, int);
543 int	_latin1(Rune*, int);
544 
545 int	mousescrollsize(int);
546 
547 #if defined(__cplusplus)
548 }
549 #endif
550 #endif