1 /* font.h -- header file for the font module.
2 Copyright (C) 2003, 2004
3 National Institute of Advanced Industrial Science and Technology (AIST)
4 Registration Number H15PRO112
6 This file is part of the m17n library.
8 The m17n library is free software; you can redistribute it and/or
9 modify it under the terms of the GNU Lesser General Public License
10 as published by the Free Software Foundation; either version 2.1 of
11 the License, or (at your option) any later version.
13 The m17n library is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public
19 License along with the m17n library; if not, write to the Free
20 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
28 /* The order of MFONT_FOUNDRY to MFONT_ADSTYLE must be the same as
29 enum MFaceProperty. */
38 /* The follwoings should not be used as an index to
43 MFONT_PROPERTY_MAX = MFONT_SIZE
56 MFONT_SOURCE_UNDECIDED = 0,
63 MFONT_SPACING_UNDECIDED,
64 MFONT_SPACING_PROPORTIONAL,
66 MFONT_SPACING_CHARCELL
69 typedef struct MFontEncoding MFontEncoding;
70 typedef struct MFontDriver MFontDriver;
72 /** Information about a font. This structure is used in three ways:
73 FONT-OBJ, FONT-OPENED, and FONT-SPEC.
75 FONT-OBJ: To store information of an existing font. Instances
76 appear only in <font_list> of MDisplay.
78 FONT-OPENED: To store information of an opened font. Instances
79 appear only in <opend_list> of MDisplay.
81 FONT-SPEC: To store specifications of a font. Instances appear
82 only in <spec_list> of MFontset. */
86 /** Numeric value of each font property. Also used as an index to
87 the table @c mfont__property_table to get the actual name of the
90 For FONT-OBJ, FONT-OPENED: The value is greater than zero.
92 For FONT-SPEC: The value is equal to or greater than zero. Zero
93 means that the correponding property is not specified (i.e. wild
96 For FONT-OBJ: If the value is 0, the font is scalable or
99 For FONT-OPENED: The actual size of opened font.
101 <property>[MFONT_RESY] is the designed resolution of the font in
102 DPI, or zero. Zero means that the font is scalable.
104 For the time being, we mention only Y-resolution (resy) and
105 assume that resx is always equal to resy. */
106 unsigned short property[MFONT_PROPERTY_MAX];
107 enum MFontType type : 2;
108 enum MFontSource source : 2;
109 enum MFontSpacing spacing : 2;
110 unsigned for_full_width : 1;
111 /* Pixel size of the font in 1/10 pixels. The negative value means
112 a point size in 1/10 pt. */
116 MFontEncoding *encoding;
124 } MFontPropertyTable;
126 extern MFontPropertyTable mfont__property_table[MFONT_REGISTRY + 1];
128 /** Return the symbol of the Nth font property of FONT. */
129 #define FONT_PROPERTY(font, n) \
130 (mfont__property_table[(n)].names[(font)->property[(n)]])
134 /* Font spec used to find the font.
135 MRealizedFont::spec.property[MFONT_TYPE] is MFONT_TYPE_REALIZED
136 so that this object can be distingushed from MFont. */
139 /* Frame on which the font is realized. */
142 /* The found font. */
147 /* Font Layout Table for the font. This is just a container to
148 carry the infomation. */
151 /* Extra information set by MRealizedFont::driver->open. If
152 non-NULL, it must be a pointer to a managed object. */
155 int ascent, descent, max_advance, average_width, baseline_offset;
157 /* Pointer to the font structure. */
168 /** Structure to hold a list of fonts. */
179 /** Return a font best matching with FONT. */
180 MFont *(*select) (MFrame *frame, MFont *font, int limited_size);
182 /** Open a font specified by RFONT. */
183 MRealizedFont *(*open) (MFrame *frame, MFont *font, MFont *spec,
184 MRealizedFont *rfont);
186 /** Set metrics of glyphs in GSTRING from FROM to TO. */
187 void (*find_metric) (MRealizedFont *rfont, MGlyphString *gstring,
190 /** Check if the font has a glyph for CODE. CODE is a code point of
191 a character in font->encoder->encoding_charset. Return nonzero
192 iff the font has the glyph. */
193 int (*has_char) (MFrame *frame, MFont *font, MFont *spec,
194 int c, unsigned code);
196 /** Encode CODE into a glyph code the font. CODE is a code point of
197 a character in rfont->encoder->encoding_charset. If the font
198 has no glyph for CODE, return MCHAR_INVALID_CODE. */
199 unsigned (*encode_char) (MFrame *frame, MFont *font, MFont *spec,
202 /** Draw glyphs from FROM to TO (exclusive) on window WIN of FRAME
203 at coordinate (X, Y) relative to WIN. */
204 void (*render) (MDrawWindow win, int x, int y,
205 MGlyphString *gstring, MGlyph *from, MGlyph *to,
206 int reverse, MDrawRegion region);
208 /** Push to PLIST fonts matching with FONT. MAXNUM if greater than
209 0 limits the number of listed fonts. Return the number of fonts
211 int (*list) (MFrame *frame, MPlist *plist, MFont *font, int maxnum);
213 /** Check if RFONT support CAPABILITY. */
214 int (*check_capability) (MRealizedFont *rfont, MSymbol capability);
217 /** Initialize the members of FONT. */
219 #define MFONT_INIT(font) memset ((font), 0, sizeof (MFont))
221 extern MSymbol Mlayouter;
222 extern MSymbol Miso8859_1, Miso10646_1, Municode_bmp, Municode_full;
223 extern MSymbol Mapple_roman;
225 extern int mfont__flt_init ();
227 extern void mfont__flt_fini ();
230 #include <ft2build.h>
231 #include FT_FREETYPE_H
233 #ifdef HAVE_FONTCONFIG
234 #include <fontconfig/fontconfig.h>
239 #else /* not HAVE_OTF */
240 typedef unsigned OTF_Tag;
241 #endif /* not HAVE_OTF */
243 enum MFontOpenTypeTable
261 } features[MFONT_OTT_MAX];
264 extern MFontDriver mfont__ft_driver;
266 extern int mfont__ft_init ();
268 extern void mfont__ft_fini ();
270 extern int mfont__ft_parse_name (const char *name, MFont *font);
272 extern char *mfont__ft_unparse_name (MFont *font);
276 extern int mfont__ft_drive_otf (MGlyphString *gstring, int from, int to,
277 MFontCapability *capability);
279 extern int mfont__ft_decode_otf (MGlyph *g);
281 #endif /* HAVE_OTF */
283 #endif /* HAVE_FREETYPE */
285 extern void mfont__free_realized (MRealizedFont *rfont);
287 extern int mfont__match_p (MFont *font, MFont *spec, int prop);
289 extern int mfont__merge (MFont *dst, MFont *src, int error_on_conflict);
291 extern void mfont__set_spec_from_face (MFont *spec, MFace *face);
293 extern MSymbol mfont__set_spec_from_plist (MFont *spec, MPlist *plist);
295 extern void mfont__resize (MFont *spec, MFont *request);
297 extern int mfont__has_char (MFrame *frame, MFont *font, MFont *spec, int c);
299 extern unsigned mfont__encode_char (MFrame *frame, MFont *font, MFont *spec,
302 extern MFont *mfont__select (MFrame *frame, MFont *font, int max_size);
304 extern MFontList *mfont__list (MFrame *frame, MFont *spec, MFont *request,
307 extern MRealizedFont *mfont__open (MFrame *frame, MFont *font, MFont *spec);
309 extern void mfont__get_metric (MGlyphString *gstring, int from, int to);
311 extern void mfont__set_property (MFont *font, enum MFontProperty key,
314 extern int mfont__split_name (char *name, int *property_idx,
315 unsigned short *point, unsigned short *resy);
317 extern int mfont__parse_name_into_font (const char *name, MSymbol format,
320 extern MPlist *mfont__encoding_list (void);
322 extern MFontCapability *mfont__get_capability (MSymbol sym);
324 extern int mfont__check_capability (MRealizedFont *rfont, MSymbol capability);
326 extern unsigned mfont__flt_encode_char (MSymbol layouter_name, int c);
328 extern int mfont__flt_run (MGlyphString *gstring, int from, int to,
329 MRealizedFace *rface);
331 #endif /* _M17N_FONT_H_ */