1 #ifndef _MEMDRAW_H_
2 #define _MEMDRAW_H_ 1
3 #if defined(__cplusplus)
4 extern "C" { 
5 #endif
6 
7 AUTOLIB(memdraw)
8 AUTOLIB(memlayer)
9 
10 typedef struct	Memimage Memimage;
11 typedef struct	Memdata Memdata;
12 typedef struct	Memsubfont Memsubfont;
13 typedef struct	Memlayer Memlayer;
14 typedef struct	Memcmap Memcmap;
15 typedef struct	Memdrawparam	Memdrawparam;
16 
17 /*
18  * Memdata is allocated from main pool, but .data from the image pool.
19  * Memdata is allocated separately to permit patching its pointer after
20  * compaction when windows share the image data.
21  * The first word of data is a back pointer to the Memdata, to find
22  * The word to patch.
23  */
24 
25 struct Memdata
26 {
27 	u32int	*base;	/* allocated data pointer */
28 	uchar	*bdata;	/* pointer to first byte of actual data; word-aligned */
29 	int	ref;	/* number of Memimages using this data */
30 	void*	imref;
31 	int	allocd;	/* is this malloc'd? */
32 };
33 
34 enum {
35 	Frepl	= 1<<0,	/* is replicated */
36 	Fsimple	= 1<<1,	/* is 1x1 */
37 	Fgrey	= 1<<2,	/* is grey */
38 	Falpha	= 1<<3,	/* has explicit alpha */
39 	Fcmap	= 1<<4,	/* has cmap channel */
40 	Fbytes	= 1<<5	/* has only 8-bit channels */
41 };
42 
43 struct Memimage
44 {
45 	Rectangle	r;	/* rectangle in data area, local coords */
46 	Rectangle	clipr;	/* clipping region */
47 	int		depth;	/* number of bits of storage per pixel */
48 	int		nchan;	/* number of channels */
49 	u32int		chan;	/* channel descriptions */
50 	Memcmap		*cmap;
51 
52 	Memdata		*data;	/* pointer to data; shared by windows in this image */
53 	int		zero;	/* data->bdata+zero==&byte containing (0,0) */
54 	u32int		width;	/* width in words of a single scan line */
55 	Memlayer	*layer;	/* nil if not a layer*/
56 	u32int		flags;
57 	void		*X;
58 	int		screenref;	/* reference count if this is a screen */
59 
60 	int		shift[NChan];
61 	int		mask[NChan];
62 	int		nbits[NChan];
63 };
64 
65 struct Memcmap
66 {
67 	uchar	cmap2rgb[3*256];
68 	uchar	rgb2cmap[16*16*16];
69 };
70 
71 /*
72  * Subfonts
73  *
74  * given char c, Subfont *f, Fontchar *i, and Point p, one says
75  *	i = f->info+c;
76  *	draw(b, Rect(p.x+i->left, p.y+i->top,
77  *		p.x+i->left+((i+1)->x-i->x), p.y+i->bottom),
78  *		color, f->bits, Pt(i->x, i->top));
79  *	p.x += i->width;
80  * to draw characters in the specified color (itself a Memimage) in Memimage b.
81  */
82 
83 struct	Memsubfont
84 {
85 	char		*name;
86 	short		n;		/* number of chars in font */
87 	uchar		height;		/* height of bitmap */
88 	char		ascent;		/* top of bitmap to baseline */
89 	Fontchar	*info;		/* n+1 character descriptors */
90 	Memimage	*bits;		/* of font */
91 };
92 
93 /*
94  * Encapsulated parameters and information for sub-draw routines.
95  */
96 enum {
97 	Simplesrc=1<<0,
98 	Simplemask=1<<1,
99 	Replsrc=1<<2,
100 	Replmask=1<<3,
101 	Fullsrc=1<<4,
102 	Fullmask=1<<5
103 };
104 struct	Memdrawparam
105 {
106 	Memimage *dst;
107 	Rectangle	r;
108 	Memimage *src;
109 	Rectangle sr;
110 	Memimage *mask;
111 	Rectangle mr;
112 	int op;
113 
114 	u32int state;
115 	u32int mval;	/* if Simplemask, the mask pixel in mask format */
116 	u32int mrgba;	/* mval in rgba */
117 	u32int sval;	/* if Simplesrc, the source pixel in src format */
118 	u32int srgba;	/* sval in rgba */
119 	u32int sdval;	/* sval in dst format */
120 };
121 
122 /*
123  * Memimage management
124  */
125 
126 extern Memimage*	allocmemimage(Rectangle, u32int);
127 extern Memimage*	allocmemimaged(Rectangle, u32int, Memdata*, void*);
128 extern Memimage*	readmemimage(int);
129 extern Memimage*	creadmemimage(int);
130 extern int		writememimage(int, Memimage*);
131 extern void		freememimage(Memimage*);
132 extern int		loadmemimage(Memimage*, Rectangle, uchar*, int);
133 extern int		cloadmemimage(Memimage*, Rectangle, uchar*, int);
134 extern int		unloadmemimage(Memimage*, Rectangle, uchar*, int);
135 extern u32int*		wordaddr(Memimage*, Point);
136 extern uchar*		byteaddr(Memimage*, Point);
137 extern int		drawclip(Memimage*, Rectangle*, Memimage*, Point*,
138 				Memimage*, Point*, Rectangle*, Rectangle*);
139 extern void		memfillcolor(Memimage*, u32int);
140 extern int		memsetchan(Memimage*, u32int);
141 extern u32int		pixelbits(Memimage*, Point);
142 
143 /*
144  * Graphics
145  */
146 extern void	memdraw(Memimage*, Rectangle, Memimage*, Point, 
147 			Memimage*, Point, int);
148 extern void	memline(Memimage*, Point, Point, int, int, int,
149 			Memimage*, Point, int);
150 extern void	mempoly(Memimage*, Point*, int, int, int, int,
151 			Memimage*, Point, int);
152 extern void	memfillpoly(Memimage*, Point*, int, int,
153 			Memimage*, Point, int);
154 extern void	_memfillpolysc(Memimage*, Point*, int, int,
155 			Memimage*, Point, int, int, int, int);
156 extern void	memimagedraw(Memimage*, Rectangle, Memimage*, Point,
157 			Memimage*, Point, int);
158 extern int	hwdraw(Memdrawparam*);
159 extern void	memimageline(Memimage*, Point, Point, int, int, int,
160 			Memimage*, Point, int);
161 extern void	_memimageline(Memimage*, Point, Point, int, int, int,
162 			Memimage*, Point, Rectangle, int);
163 extern Point	memimagestring(Memimage*, Point, Memimage*, Point,
164 			Memsubfont*, char*);
165 extern void	memellipse(Memimage*, Point, int, int, int,
166 			Memimage*, Point, int);
167 extern void	memarc(Memimage*, Point, int, int, int, Memimage*,
168 			Point, int, int, int);
169 extern Rectangle memlinebbox(Point, Point, int, int, int);
170 extern int	memlineendsize(int);
171 extern void	_memmkcmap(void);
172 extern void	memimageinit(void);
173 
174 /*
175  * Subfont management
176  */
177 extern Memsubfont*	allocmemsubfont(char*, int, int, int, Fontchar*, Memimage*);
178 extern Memsubfont*	openmemsubfont(char*);
179 extern void		freememsubfont(Memsubfont*);
180 extern Point		memsubfontwidth(Memsubfont*, char*);
181 
182 /*
183  * Predefined 
184  */
185 extern	Memimage*	memwhite;
186 extern	Memimage*	memblack;
187 extern	Memimage*	memopaque;
188 extern	Memimage*	memtransparent;
189 extern	Memcmap*	memdefcmap;
190 
191 /*
192  * Kernel interface
193  */
194 void			memimagemove(void*, void*);
195 
196 /*
197  * Kernel cruft
198  */
199 extern void		rdb(void);
200 extern int		iprint(char*, ...);
201 extern int		drawdebug;
202 
203 /*
204  * For other implementations, like x11.
205  */
206 extern void		_memfillcolor(Memimage*, u32int);
207 extern Memimage*	_allocmemimage(Rectangle, u32int);
208 extern int		_cloadmemimage(Memimage*, Rectangle, uchar*, int);
209 extern int		_loadmemimage(Memimage*, Rectangle, uchar*, int);
210 extern void		_freememimage(Memimage*);
211 extern u32int		_rgbatoimg(Memimage*, u32int);
212 extern u32int		_imgtorgba(Memimage*, u32int);
213 extern u32int		_pixelbits(Memimage*, Point);
214 extern int		_unloadmemimage(Memimage*, Rectangle, uchar*, int);
215 extern Memdrawparam*	_memimagedrawsetup(Memimage*,
216 				Rectangle, Memimage*, Point, Memimage*,
217 				Point, int);
218 extern void		_memimagedraw(Memdrawparam*);
219 
220 #if defined(__cplusplus)
221 }
222 #endif
223 #endif