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plan9port / plan9 / 59d7d92ee7a1de3387cedb079b1bfcfc75d34b8b / . / include / memdraw.h
blob: 2d4f54f5aba0a3c2f1f93aeb8ed607b9cb35a678 [file] [log] [blame]
rsc55dedf72003-09-30 19:06:20 +0000[diff] [blame]1typedef struct Memimage Memimage;
2typedef struct Memdata Memdata;
3typedef struct Memsubfont Memsubfont;
4typedef struct Memlayer Memlayer;
5typedef struct Memcmap Memcmap;
6typedef struct Memdrawparam Memdrawparam;
7
8/*
9 * Memdata is allocated from main pool, but .data from the image pool.
10 * Memdata is allocated separately to permit patching its pointer after
11 * compaction when windows share the image data.
12 * The first word of data is a back pointer to the Memdata, to find
13 * The word to patch.
14 */
15
16struct Memdata
17{
18 u32int *base; /* allocated data pointer */
19 uchar *bdata; /* pointer to first byte of actual data; word-aligned */
20 int ref; /* number of Memimages using this data */
21 void* imref;
22 int allocd; /* is this malloc'd? */
23};
24
25enum {
26 Frepl = 1<<0, /* is replicated */
27 Fsimple = 1<<1, /* is 1x1 */
28 Fgrey = 1<<2, /* is grey */
29 Falpha = 1<<3, /* has explicit alpha */
30 Fcmap = 1<<4, /* has cmap channel */
31 Fbytes = 1<<5, /* has only 8-bit channels */
32};
33
34struct Memimage
35{
36 Rectangle r; /* rectangle in data area, local coords */
37 Rectangle clipr; /* clipping region */
38 int depth; /* number of bits of storage per pixel */
39 int nchan; /* number of channels */
40 u32int chan; /* channel descriptions */
41 Memcmap *cmap;
42
43 Memdata *data; /* pointer to data; shared by windows in this image */
44 int zero; /* data->bdata+zero==&byte containing (0,0) */
45 u32int width; /* width in words of a single scan line */
46 Memlayer *layer; /* nil if not a layer*/
47 u32int flags;
48 void *X;
rsc20093742003-10-11 02:50:20 +0000[diff] [blame]49 int screenref; /* reference count if this is a screen */
rsc55dedf72003-09-30 19:06:20 +0000[diff] [blame]50
51 int shift[NChan];
52 int mask[NChan];
53 int nbits[NChan];
54};
55
56struct Memcmap
57{
58 uchar cmap2rgb[3*256];
59 uchar rgb2cmap[16*16*16];
60};
61
62/*
63 * Subfonts
64 *
65 * given char c, Subfont *f, Fontchar *i, and Point p, one says
66 * i = f->info+c;
67 * draw(b, Rect(p.x+i->left, p.y+i->top,
68 * p.x+i->left+((i+1)->x-i->x), p.y+i->bottom),
69 * color, f->bits, Pt(i->x, i->top));
70 * p.x += i->width;
71 * to draw characters in the specified color (itself a Memimage) in Memimage b.
72 */
73
74struct Memsubfont
75{
76 char *name;
77 short n; /* number of chars in font */
78 uchar height; /* height of bitmap */
79 char ascent; /* top of bitmap to baseline */
80 Fontchar *info; /* n+1 character descriptors */
81 Memimage *bits; /* of font */
82};
83
84/*
85 * Encapsulated parameters and information for sub-draw routines.
86 */
87enum {
88 Simplesrc=1<<0,
89 Simplemask=1<<1,
90 Replsrc=1<<2,
91 Replmask=1<<3,
92 Fullmask=1<<4,
93};
94struct Memdrawparam
95{
96 Memimage *dst;
97 Rectangle r;
98 Memimage *src;
99 Rectangle sr;
100 Memimage *mask;
101 Rectangle mr;
102 int op;
103
104 u32int state;
105 u32int mval; /* if Simplemask, the mask pixel in mask format */
106 u32int mrgba; /* mval in rgba */
107 u32int sval; /* if Simplesrc, the source pixel in src format */
108 u32int srgba; /* sval in rgba */
109 u32int sdval; /* sval in dst format */
110};
111
112/*
113 * Memimage management
114 */
115
116extern Memimage* allocmemimage(Rectangle, u32int);
117extern Memimage* allocmemimaged(Rectangle, u32int, Memdata*, void*);
118extern Memimage* readmemimage(int);
119extern Memimage* creadmemimage(int);
120extern int writememimage(int, Memimage*);
121extern void freememimage(Memimage*);
122extern int loadmemimage(Memimage*, Rectangle, uchar*, int);
123extern int cloadmemimage(Memimage*, Rectangle, uchar*, int);
124extern int unloadmemimage(Memimage*, Rectangle, uchar*, int);
125extern u32int* wordaddr(Memimage*, Point);
126extern uchar* byteaddr(Memimage*, Point);
127extern int drawclip(Memimage*, Rectangle*, Memimage*, Point*,
128 Memimage*, Point*, Rectangle*, Rectangle*);
129extern void memfillcolor(Memimage*, u32int);
130extern int memsetchan(Memimage*, u32int);
131extern u32int pixelbits(Memimage*, Point);
132
133/*
134 * Graphics
135 */
136extern void memdraw(Memimage*, Rectangle, Memimage*, Point,
137 Memimage*, Point, int);
138extern void memline(Memimage*, Point, Point, int, int, int,
139 Memimage*, Point, int);
140extern void mempoly(Memimage*, Point*, int, int, int, int,
141 Memimage*, Point, int);
142extern void memfillpoly(Memimage*, Point*, int, int,
143 Memimage*, Point, int);
144extern void _memfillpolysc(Memimage*, Point*, int, int,
145 Memimage*, Point, int, int, int, int);
146extern void memimagedraw(Memimage*, Rectangle, Memimage*, Point,
147 Memimage*, Point, int);
148extern int hwdraw(Memdrawparam*);
149extern void memimageline(Memimage*, Point, Point, int, int, int,
150 Memimage*, Point, int);
151extern void _memimageline(Memimage*, Point, Point, int, int, int,
152 Memimage*, Point, Rectangle, int);
153extern Point memimagestring(Memimage*, Point, Memimage*, Point,
154 Memsubfont*, char*);
155extern void memellipse(Memimage*, Point, int, int, int,
156 Memimage*, Point, int);
157extern void memarc(Memimage*, Point, int, int, int, Memimage*,
158 Point, int, int, int);
159extern Rectangle memlinebbox(Point, Point, int, int, int);
160extern int memlineendsize(int);
161extern void _memmkcmap(void);
162extern void memimageinit(void);
163
164/*
165 * Subfont management
166 */
167extern Memsubfont* allocmemsubfont(char*, int, int, int, Fontchar*, Memimage*);
168extern Memsubfont* openmemsubfont(char*);
169extern void freememsubfont(Memsubfont*);
170extern Point memsubfontwidth(Memsubfont*, char*);
171extern Memsubfont* getmemdefont(void);
172
173/*
174 * Predefined
175 */
176extern Memimage* memwhite;
177extern Memimage* memblack;
178extern Memimage* memopaque;
179extern Memimage* memtransparent;
180extern Memcmap* memdefcmap;
181
182/*
183 * Kernel interface
184 */
185void memimagemove(void*, void*);
186
187/*
188 * Kernel cruft
189 */
190extern void rdb(void);
191extern int iprint(char*, ...);
192extern int drawdebug;
193
194/*
195 * For other implementations, like x11.
196 */
197extern void _memfillcolor(Memimage*, u32int);
198extern Memimage* _allocmemimage(Rectangle, u32int);
199extern int _cloadmemimage(Memimage*, Rectangle, uchar*, int);
200extern int _loadmemimage(Memimage*, Rectangle, uchar*, int);
201extern void _freememimage(Memimage*);
202extern u32int _rgbatoimg(Memimage*, u32int);
203extern u32int _imgtorgba(Memimage*, u32int);
204extern u32int _pixelbits(Memimage*, Point);
205extern int _unloadmemimage(Memimage*, Rectangle, uchar*, int);
206extern Memdrawparam* _memimagedrawsetup(Memimage*,
207 Rectangle, Memimage*, Point, Memimage*,
208 Point, int);
209extern void _memimagedraw(Memdrawparam*);
210extern void _drawreplacescreenimage(Memimage*);