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
26 /** Type of font. Now obsolete. */
30 /** Fonts supproted by a window system natively. On X Window
31 System, it is an X font. */
34 /** Fonts supported by FreeType library. */
44 /* The order of MFONT_FOUNDRY to MFONT_ADSTYLE must be the same as
45 enum MFaceProperty. */
59 /** Information about a font. This structure is used in three ways:
60 FONT-OBJ, FONT-OPENED, and FONT-SPEC.
62 FONT-OBJ: To store information of an existing font. Instances
63 appear only in <font_list> of MDisplay.
65 FONT-OPENED: To store information of an opened font. Instances
66 appear only in <opend_list> of MDisplay.
68 FONT-SPEC: To store specifications of a font. Instances appear
69 only in <spec_list> of MFontset. */
73 /** Numeric value of each font property. Also used as an index to
74 the table @c mfont__property_table to get the actual name of the
77 For FONT-OBJ, FONT-OPENED: The value is greater than zero.
79 For FONT-SPEC: The value is equal to or greater than zero. Zero
80 means that the correponding property is not specified (i.e. wild
83 <property>[MFONT_SIZE] is the size of the font in 1/10 pixels.
85 For FONT-OBJ: If the value is 0, the font is scalable or
88 For FONT-OPENED: The actual size of opened font.
90 <prperty>[MFONT_RESY] is the designed resolution of the font in
91 DPI, or zero. Zero means that the font is scalable.
93 For the time being, we mention only Y-resolution (resy) and
94 assume that resx is always equal to resy. */
95 unsigned short property[MFONT_PROPERTY_MAX];
103 } MFontPropertyTable;
105 extern MFontPropertyTable mfont__property_table[MFONT_REGISTRY + 1];
107 /** Return the symbol of the Nth font property of FONT. */
108 #define FONT_PROPERTY(font, n) \
109 mfont__property_table[(n)].names[(font)->property[(n)]]
111 typedef struct MFontEncoding MFontEncoding;
115 /* Frame on which the font is realized. */
118 /* Font spec used to find the font. */
121 /* Font spec requested by a face. */
124 /* The found font. */
127 /* How well <font> matches with <request>. */
132 /* Font Layout Table for the font. */
135 /* 0: not yet tried to open
137 1: succeessfully opened. */
140 /* Extra information set by <driver>->select or <driver>->open. If
141 non-NULL, it must be a pointer to a managed object. */
144 short ascent, descent;
146 MFontEncoding *encoding;
148 /* Type of the font: Mx, Mfreetype, or Mxft. */
151 /* Pointer to the font structure. */
155 /** Structure to hold a list of fonts of each registry. */
167 /** Return a font satisfying REQUEST and best matching with SPEC.
168 For the moment, LIMITTED_SIZE is ignored. */
169 MRealizedFont *(*select) (MFrame *frame, MFont *spec, MFont *request,
172 /** Open a font specified by RFONT. */
173 int (*open) (MRealizedFont *rfont);
175 /** Set metrics of glyphs in GSTRING from FROM to TO. */
176 void (*find_metric) (MRealizedFont *rfont, MGlyphString *gstring,
179 /** Encode CODE into a glyph code the font. CODE is a code point of
180 a character in rfont->encoder->encoding_charset. If the font
181 has no glyph for CODE, return MCHAR_INVALID_CODE. */
182 unsigned (*encode_char) (MRealizedFont *rfont, unsigned code);
184 /** Draw glyphs from FROM to TO (exclusive) on window WIN of FRAME
185 at coordinate (X, Y) relative to WIN. */
186 void (*render) (MDrawWindow win, int x, int y,
187 MGlyphString *gstring, MGlyph *from, MGlyph *to,
188 int reverse, MDrawRegion region);
190 /** Push to PLIST a list of fonts matching with FONT. LANGUAGE, if
191 not Mnil, limits fonts to ones that support LANGUAGE. */
192 void (*list) (MFrame *frame, MPlist *plist, MFont *font, MSymbol language);
195 /** Initialize the members of FONT. */
197 #define MFONT_INIT(font) memset ((font), 0, sizeof (MFont))
199 extern MSymbol Mlayouter;
201 extern int mfont__flt_init ();
203 extern void mfont__flt_fini ();
206 #include <ft2build.h>
207 #include FT_FREETYPE_H
211 #endif /* HAVE_OTF */
218 int otf_flag; /* This font is OTF (1), may be OTF (0), is not OTF (-1). */
219 MPlist *charmap_list;
225 #endif /* HAVE_OTF */
226 void *extra_info; /* Xft uses this member. */
229 extern MFontDriver mfont__ft_driver;
231 extern int mfont__ft_init ();
233 extern void mfont__ft_fini ();
235 extern int mfont__ft_parse_name (char *name, MFont *font);
237 extern char *mfont__ft_unparse_name (MFont *font);
241 extern int mfont__ft_drive_otf (MGlyphString *gstring, int from, int to,
242 MSymbol script, MSymbol langsys,
243 MSymbol gsub_features, MSymbol gpos_features);
245 extern int mfont__ft_decode_otf (MGlyph *g);
247 #endif /* HAVE_OTF */
249 #endif /* HAVE_FREETYPE */
251 extern void mfont__free_realized (MRealizedFont *rfont);
253 extern int mfont__match_p (MFont *font, MFont *spec, int prop);
255 extern int mfont__score (MFont *font, MFont *spec, MFont *request,
258 extern void mfont__set_spec_from_face (MFont *spec, MFace *face);
260 extern MSymbol mfont__set_spec_from_plist (MFont *spec, MPlist *plist);
262 extern void mfont__resize (MFont *spec, MFont *request);
264 extern unsigned mfont__encode_char (MRealizedFont *rfont, int c);
266 extern MRealizedFont *mfont__select (MFrame *frame, MFont *spec,
267 MFont *request, int limitted_size,
270 extern int mfont__open (MRealizedFont *rfont);
272 extern void mfont__get_metric (MGlyphString *gstring, int from, int to);
274 extern void mfont__set_property (MFont *font, enum MFontProperty key,
277 extern int mfont__split_name (char *name, int *property_idx,
278 unsigned short *point, unsigned short *resy);
280 extern void mfont__set_spec (MFont *font,
281 MSymbol attrs[MFONT_PROPERTY_MAX],
282 unsigned short size, unsigned short resy);
284 extern int mfont__parse_name_into_font (char *name, MSymbol format,
287 extern unsigned mfont__flt_encode_char (MSymbol layouter_name, int c);
289 extern int mfont__flt_run (MGlyphString *gstring, int from, int to,
290 MRealizedFace *rface);
292 #endif /* _M17N_FONT_H_ */