aboutsummaryrefslogtreecommitdiff
path: root/X11/fonts/fontstruct.h
blob: 55c89daea7c8f3560a120279b5deb7b05705fb2c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
/***********************************************************
Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.

                        All Rights Reserved

Permission to use, copy, modify, and distribute this software and its
documentation for any purpose and without fee is hereby granted,
provided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in
supporting documentation, and that the name of Digital not be
used in advertising or publicity pertaining to distribution of the
software without specific, written prior permission.

DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
SOFTWARE.

******************************************************************/

#ifndef FONTSTR_H
#define FONTSTR_H

#include <X11/Xproto.h>
#include "font.h"
#include <X11/Xfuncproto.h>
#include <X11/Xdefs.h>

/*
 * This version of the server font data strucutre is only for describing
 * the in memory data structure. The file structure is not necessarily a
 * copy of this. That is up to the compiler and the OS layer font loading
 * machinery.
 */

#define GLYPHPADOPTIONS 4	/* 1, 2, 4, or 8 */

typedef struct _FontProp {
    long        name;
    long        value;		/* assumes ATOM is not larger than INT32 */
}           FontPropRec;

typedef struct _FontResolution {
    unsigned short x_resolution;
    unsigned short y_resolution;
    unsigned short point_size;
}           FontResolutionRec;

typedef struct _ExtentInfo {
    DrawDirection drawDirection;
    int         fontAscent;
    int         fontDescent;
    int         overallAscent;
    int         overallDescent;
    int         overallWidth;
    int         overallLeft;
    int         overallRight;
}           ExtentInfoRec;

typedef struct _CharInfo {
    xCharInfo   metrics;	/* info preformatted for Queries */
    char       *bits;		/* pointer to glyph image */
}           CharInfoRec;

/*
 * Font is created at font load time. It is specific to a single encoding.
 * e.g. not all of the glyphs in a font may be part of a single encoding.
 */

typedef struct _FontInfo {
    unsigned short firstCol;
    unsigned short lastCol;
    unsigned short firstRow;
    unsigned short lastRow;
    unsigned short defaultCh;
    unsigned int noOverlap:1;
    unsigned int terminalFont:1;
    unsigned int constantMetrics:1;
    unsigned int constantWidth:1;
    unsigned int inkInside:1;
    unsigned int inkMetrics:1;
    unsigned int allExist:1;
    unsigned int drawDirection:2;
    unsigned int cachable:1;
    unsigned int anamorphic:1;
    short       maxOverlap;
    short       pad;
    xCharInfo   maxbounds;
    xCharInfo   minbounds;
    xCharInfo   ink_maxbounds;
    xCharInfo   ink_minbounds;
    short       fontAscent;
    short       fontDescent;
    int         nprops;
    FontPropPtr props;
    char       *isStringProp;
}           FontInfoRec;

typedef struct _Font {
    int         refcnt;
    FontInfoRec info;
    char        bit;
    char        byte;
    char        glyph;
    char        scan;
    fsBitmapFormat format;
    int         (*get_glyphs) (FontPtr         /* font */,
			       unsigned long   /* count */,
			       unsigned char * /* chars */,
			       FontEncoding    /* encoding */,
			       unsigned long * /* count */,
			       CharInfoPtr *   /* glyphs */);
    int         (*get_metrics) (FontPtr         /* font */,
				unsigned long   /* count */,
				unsigned char * /* chars */,
				FontEncoding    /* encoding */,
				unsigned long * /* count */,
				xCharInfo **    /* glyphs */);
    void        (*unload_font) (FontPtr         /* font */);
    void        (*unload_glyphs) (FontPtr         /* font */);
    FontPathElementPtr fpe;
    void        *svrPrivate;
    void        *fontPrivate;
    void        *fpePrivate;
    int		maxPrivate;
    void        **devPrivates;
}           FontRec;

#define FontGetPrivate(pFont,n) ((n) > (pFont)->maxPrivate ? (void *) 0 : \
			     (pFont)->devPrivates[n])

#define FontSetPrivate(pFont,n,ptr) ((n) > (pFont)->maxPrivate ? \
			_FontSetNewPrivate (pFont, n, ptr) : \
			((((pFont)->devPrivates[n] = (ptr)) != 0) || TRUE))

typedef struct _FontNames {
    int         nnames;
    int         size;
    int        *length;
    char      **names;
}           FontNamesRec;


/* External view of font paths */
typedef struct _FontPathElement {
    int         name_length;
#if FONT_PATH_ELEMENT_NAME_CONST
    const
#endif
    char        *name;
    int         type;
    int         refcount;
    void        *private;
}           FontPathElementRec;

typedef Bool (*NameCheckFunc) (const char *name);
typedef int (*InitFpeFunc) (FontPathElementPtr fpe);
typedef int (*FreeFpeFunc) (FontPathElementPtr fpe);
typedef int (*ResetFpeFunc) (FontPathElementPtr fpe);
typedef int (*OpenFontFunc) ( void *client,
			      FontPathElementPtr fpe,
			      Mask flags,
			      const char* name,
			      int namelen,
			      fsBitmapFormat format,
			      fsBitmapFormatMask fmask,
			      XID id,
			      FontPtr* pFont,
			      char** aliasName,
			      FontPtr non_cachable_font);
typedef void (*CloseFontFunc) (FontPathElementPtr fpe, FontPtr pFont);
typedef int (*ListFontsFunc) (void *client,
			      FontPathElementPtr fpe,
			      const char* pat,
			      int len,
			      int max,
			      FontNamesPtr names);

typedef int (*StartLfwiFunc) (void *client,
			      FontPathElementPtr fpe,
			      const char* pat,
			      int len,
			      int max,
			      void ** privatep);

typedef int (*NextLfwiFunc) (void *client,
			     FontPathElementPtr fpe,
			     char** name,
			     int* namelen,
			     FontInfoPtr* info,
			     int* numFonts,
			     void *private);

typedef int (*WakeupFpeFunc) (FontPathElementPtr fpe,
			      unsigned long* LastSelectMask);

typedef void (*ClientDiedFunc) (void *client,
			       FontPathElementPtr fpe);

typedef int (*LoadGlyphsFunc) (void *client,
			       FontPtr pfont,
			       Bool range_flag,
			       unsigned int nchars,
			       int item_size,
			       unsigned char* data);

typedef int (*StartLaFunc) (void *client,
			    FontPathElementPtr fpe,
			    const char* pat,
			    int len,
			    int max,
			    void ** privatep);

typedef int (*NextLaFunc) (void *client,
			   FontPathElementPtr fpe,
			   char** namep,
			   int* namelenp,
			   char** resolvedp,
			   int* resolvedlenp,
			   void *private);

typedef void (*SetPathFunc)(void);

typedef struct _FPEFunctions {
    NameCheckFunc       name_check;
    InitFpeFunc 	init_fpe;
    ResetFpeFunc	reset_fpe;
    FreeFpeFunc         free_fpe;
    OpenFontFunc        open_font;
    CloseFontFunc       close_font;
    ListFontsFunc       list_fonts;
    StartLaFunc         start_list_fonts_and_aliases;
    NextLaFunc          list_next_font_or_alias;
    StartLfwiFunc       start_list_fonts_with_info;
    NextLfwiFunc        list_next_font_with_info;
    WakeupFpeFunc       wakeup_fpe;
    ClientDiedFunc 	client_died;
		/* for load_glyphs, range_flag = 0 ->
			nchars = # of characters in data
			item_size = bytes/char
			data = list of characters
		   range_flag = 1 ->
			nchars = # of fsChar2b's in data
			item_size is ignored
			data = list of fsChar2b's */
    LoadGlyphsFunc	load_glyphs;
    SetPathFunc		set_path_hook;
} FPEFunctionsRec, FPEFunctions;

/*
 * Various macros for computing values based on contents of
 * the above structures
 */

#define	GLYPHWIDTHPIXELS(pci) \
	((pci)->metrics.rightSideBearing - (pci)->metrics.leftSideBearing)

#define	GLYPHHEIGHTPIXELS(pci) \
 	((pci)->metrics.ascent + (pci)->metrics.descent)

#define	GLYPHWIDTHBYTES(pci)	(((GLYPHWIDTHPIXELS(pci))+7) >> 3)

#define GLYPHWIDTHPADDED(bc)	(((bc)+7) & ~0x7)

#define BYTES_PER_ROW(bits, nbytes) \
	((nbytes) == 1 ? (((bits)+7)>>3)	/* pad to 1 byte */ \
	:(nbytes) == 2 ? ((((bits)+15)>>3)&~1)	/* pad to 2 bytes */ \
	:(nbytes) == 4 ? ((((bits)+31)>>3)&~3)	/* pad to 4 bytes */ \
	:(nbytes) == 8 ? ((((bits)+63)>>3)&~7)	/* pad to 8 bytes */ \
	: 0)

#define BYTES_FOR_GLYPH(ci,pad)	(GLYPHHEIGHTPIXELS(ci) * \
				 BYTES_PER_ROW(GLYPHWIDTHPIXELS(ci),pad))
/*
 * Macros for computing different bounding boxes for fonts; from
 * the font protocol
 */

#define FONT_MAX_ASCENT(pi)	((pi)->fontAscent > (pi)->ink_maxbounds.ascent ? \
			    (pi)->fontAscent : (pi)->ink_maxbounds.ascent)
#define FONT_MAX_DESCENT(pi)	((pi)->fontDescent > (pi)->ink_maxbounds.descent ? \
			    (pi)->fontDescent : (pi)->ink_maxbounds.descent)
#define FONT_MAX_HEIGHT(pi)	(FONT_MAX_ASCENT(pi) + FONT_MAX_DESCENT(pi))
#define FONT_MIN_LEFT(pi)	((pi)->ink_minbounds.leftSideBearing < 0 ? \
			    (pi)->ink_minbounds.leftSideBearing : 0)
#define FONT_MAX_RIGHT(pi)	((pi)->ink_maxbounds.rightSideBearing > \
				(pi)->ink_maxbounds.characterWidth ? \
			    (pi)->ink_maxbounds.rightSideBearing : \
				(pi)->ink_maxbounds.characterWidth)
#define FONT_MAX_WIDTH(pi)	(FONT_MAX_RIGHT(pi) - FONT_MIN_LEFT(pi))

#include "fontproto.h"

#endif				/* FONTSTR_H */