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 /* 1 iff the font is opend by encapsulating client-side font data. */
154 /* Extra information set by MRealizedFont::driver->open. If
155 non-NULL, it must be a pointer to a managed object. */
158 int ascent, descent, max_advance, average_width, baseline_offset;
160 /* Pointer to the font structure. */
171 /** Structure to hold a list of fonts. */
182 /** Return a font best matching with FONT. */
183 MFont *(*select) (MFrame *frame, MFont *font, int limited_size);
185 /** Open a font specified by RFONT. */
186 MRealizedFont *(*open) (MFrame *frame, MFont *font, MFont *spec,
187 MRealizedFont *rfont);
189 /** Set metrics of glyphs in GSTRING from FROM to TO. */
190 void (*find_metric) (MRealizedFont *rfont, MGlyphString *gstring,
193 /** Check if the font has a glyph for CODE. CODE is a code point of
194 a character in font->encoder->encoding_charset. Return nonzero
195 iff the font has the glyph. */
196 int (*has_char) (MFrame *frame, MFont *font, MFont *spec,
197 int c, unsigned code);
199 /** Encode CODE into a glyph code the font. CODE is a code point of
200 a character in rfont->encoder->encoding_charset. If the font
201 has no glyph for CODE, return MCHAR_INVALID_CODE. */
202 unsigned (*encode_char) (MFrame *frame, MFont *font, MFont *spec,
205 /** Draw glyphs from FROM to TO (exclusive) on window WIN of FRAME
206 at coordinate (X, Y) relative to WIN. */
207 void (*render) (MDrawWindow win, int x, int y,
208 MGlyphString *gstring, MGlyph *from, MGlyph *to,
209 int reverse, MDrawRegion region);
211 /** Push to PLIST fonts matching with FONT. MAXNUM if greater than
212 0 limits the number of listed fonts. Return the number of fonts
214 int (*list) (MFrame *frame, MPlist *plist, MFont *font, int maxnum);
216 /** Push to PLIST font family names (symbol) available on FRAME. */
217 void (*list_family_names) (MFrame *frame, MPlist *plist);
219 /** Check if RFONT support CAPABILITY. */
220 int (*check_capability) (MRealizedFont *rfont, MSymbol capability);
222 /** Open a font by encapsulating DATA. */
223 MRealizedFont *(*encapsulate) (MFrame *frame, MSymbol source, void *data);
225 void (*close) (MRealizedFont *rfont);
228 /** Initialize the members of FONT. */
230 #define MFONT_INIT(font) memset ((font), 0, sizeof (MFont))
232 extern MSymbol Mlayouter;
233 extern MSymbol Miso8859_1, Miso10646_1, Municode_bmp, Municode_full;
234 extern MSymbol Mapple_roman;
236 extern int mfont__flt_init ();
238 extern void mfont__flt_fini ();
241 #include <ft2build.h>
242 #include FT_FREETYPE_H
244 #ifdef HAVE_FONTCONFIG
245 #include <fontconfig/fontconfig.h>
250 #else /* not HAVE_OTF */
251 typedef unsigned OTF_Tag;
252 #endif /* not HAVE_OTF */
254 enum MFontOpenTypeTable
273 } features[MFONT_OTT_MAX];
276 extern MFontDriver mfont__ft_driver;
278 extern int mfont__ft_init ();
280 extern void mfont__ft_fini ();
282 extern int mfont__ft_parse_name (const char *name, MFont *font);
284 extern char *mfont__ft_unparse_name (MFont *font);
288 extern int mfont__ft_drive_otf (MGlyphString *gstring, int from, int to,
289 MFontCapability *capability);
291 extern int mfont__ft_decode_otf (MGlyph *g);
293 #endif /* HAVE_OTF */
295 #endif /* HAVE_FREETYPE */
297 extern void mfont__free_realized (MRealizedFont *rfont);
299 extern int mfont__match_p (MFont *font, MFont *spec, int prop);
301 extern int mfont__merge (MFont *dst, MFont *src, int error_on_conflict);
303 extern void mfont__set_spec_from_face (MFont *spec, MFace *face);
305 extern MSymbol mfont__set_spec_from_plist (MFont *spec, MPlist *plist);
307 extern int mfont__has_char (MFrame *frame, MFont *font, MFont *spec, int c);
309 extern unsigned mfont__encode_char (MFrame *frame, MFont *font, MFont *spec,
312 extern MFont *mfont__select (MFrame *frame, MFont *font, int max_size);
314 extern MFontList *mfont__list (MFrame *frame, MFont *spec, MFont *request,
317 extern MRealizedFont *mfont__open (MFrame *frame, MFont *font, MFont *spec);
319 extern void mfont__get_metric (MGlyphString *gstring, int from, int to);
321 extern void mfont__set_property (MFont *font, enum MFontProperty key,
324 extern int mfont__split_name (char *name, int *property_idx,
325 unsigned short *point, unsigned short *resy);
327 extern int mfont__parse_name_into_font (const char *name, MSymbol format,
330 extern MPlist *mfont__encoding_list (void);
332 extern MFontCapability *mfont__get_capability (MSymbol sym);
334 extern int mfont__check_capability (MRealizedFont *rfont, MSymbol capability);
336 extern unsigned mfont__flt_encode_char (MSymbol layouter_name, int c);
338 extern int mfont__flt_run (MGlyphString *gstring, int from, int to,
339 MRealizedFace *rface);
341 #endif /* _M17N_FONT_H_ */