Variables: Keys of font property. | |
MSymbol | Mfoundry |
Key of font property specifying foundry. | |
MSymbol | Mfamily |
Key of font property specifying family. | |
MSymbol | Mweight |
Key of font property specifying weight. | |
MSymbol | Mstyle |
Key of font property specifying style. | |
MSymbol | Mstretch |
Key of font property specifying stretch. | |
MSymbol | Madstyle |
Key of font property specifying additional style. | |
MSymbol | Mspacing |
Key of font property specifying spacing. | |
MSymbol | Mregistry |
Key of font property specifying registry. | |
MSymbol | Msize |
Key of font property specifying size. | |
MSymbol | Mfontfile |
Key of font property specifying file name. | |
MSymbol | Mresolution |
Key of font property specifying resolution. | |
MSymbol | Mmax_advance |
Key of font property specifying max advance width. | |
MSymbol | Mfontconfig |
Symbol of name "fontconfig". | |
MSymbol | Mx |
Symbol of name "x". | |
MSymbol | Mfreetype |
Symbol of name "freetype". | |
MSymbol | Mxft |
Symbol of name "xft". | |
Typedefs | |
typedef MFont | MFont |
Type of fonts. | |
Functions | |
MFont * | mfont () |
Create a new font. | |
MFont * | mfont_parse_name (const char *name, MSymbol format) |
Create a font by parsing a fontname. | |
char * | mfont_unparse_name (MFont *font, MSymbol format) |
Create a fontname from a font. | |
MFont * | mfont_copy (MFont *font) |
Make a copy of a font. | |
void * | mfont_get_prop (MFont *font, MSymbol key) |
Get a property value of a font. | |
int | mfont_put_prop (MFont *font, MSymbol key, void *val) |
Put a property value to a font. | |
MSymbol * | mfont_selection_priority () |
Return the font selection priority. | |
int | mfont_set_selection_priority (MSymbol *keys) |
Set the font selection priority. | |
MFont * | mfont_find (MFrame *frame, MFont *spec, int *score, int max_size) |
Find a font. | |
int | mfont_set_encoding (MFont *font, MSymbol encoding_name, MSymbol repertory_name) |
Set encoding of a font. | |
char * | mfont_name (MFont *font) |
Create a fontname from a font. | |
MFont * | mfont_from_name (const char *name) |
Create a new font from fontname. | |
int | mfont_resize_ratio (MFont *font) |
Get resize information of a font. | |
MPlist * | mfont_list (MFrame *frame, MFont *font, MSymbol language, int maxnum) |
Get a list of fonts. | |
int | mfont_check (MFrame *frame, MFontset *fontset, MSymbol script, MSymbol language, MFont *font) |
Check the usability of a font. | |
Variables | |
MPlist * | mfont_freetype_path |
List of font files and directories that contain font files. |
MFont
. A font can have font properties. Like other types of properties, a font property consists of a key and a value. The key of a font property must be one of the following symbols:
Mfoundry
, Mfamily
, Mweight
, Mstyle
, Mstretch
, Madstyle
, Mregistry
, Msize
, Mresolution
, Mspacing
.
When the key of a font property is Msize
or Mresolution
, its value is an integer. Otherwise the value is a symbol.
"The font property that belongs to font F and whose key is Mxxx"
may be shortened to "the xxx property of F".
The value of a foundry property is a symbol representing font foundry information, e.g. adobe, misc, etc.
The value of a family property is a symbol representing font family information, e.g. times, helvetica, etc.
The value of a weight property is a symbol representing weight information, e.g. normal, bold, etc.
The value of a style property is a symbol representing slant information, e.g. normal, italic, etc.
The value of a stretch property is a symbol representing width information, e.g. normal, semicondensed, etc.
The value of an adstyle property is a symbol representing abstract font family information, e.g. serif, sans-serif, etc.
The value of a registry property is a symbol representing registry information, e.g. iso10646-1, iso8895-1, etc.
The value of a size property is an integer representing design size in the unit of 1/10 point.
The value of a resolution property is an integer representing assumed device resolution in the unit of dots per inch (dpi).
The value of a type property is a symbol indicating a font driver; currently Mx or Mfreetype.
The m17n library uses font objects for two purposes: to receive font specification from an application program, and to present available fonts to an application program. When the m17n library presents an available font to an application program, all font properties have a concrete value.
The m17n library supports three kinds of fonts: Window system fonts, FreeType fonts, and OpenType fonts.
The m17n-X library supports all fonts handled by an X server and an X font server. The correspondence between XLFD fields and font properties are shown below.
XLFD field property --------------- -------- FOUNDRY foundry FAMILY_NAME family WEIGHT_NAME weight SLANT style SETWIDTH_NAME stretch ADD_STYLE_NAME adstyle PIXEL_SIZE size RESOLUTION_Y resolution CHARSET_REGISTRY-CHARSET_ENCODING registry
XLFD fields not listed in the above table are ignored.
The m17n library, if configured to use the FreeType library, supports all fonts that can be handled by the FreeType library. The variable mfont_freetype_path is initialized properly according to the configuration of the m17n library and the environment variable M17NDIR
. See the documentation of the variable for details.
If the m17n library is configured to use the fontconfig library, in addition to mfont_freetype_path, all fonts available via fontconfig are supported.
The family name of a FreeType font corresponds to the family property. Style names of FreeType fonts correspond to the weight, style, and stretch properties as below.
style name weight style stretch ---------- ------ ----- ------- Regular medium r normal Italic medium i normal Bold bold r normal Bold Italic bold i normal Narrow medium r condensed Narrow Italic medium i condensed Narrow Bold bold r condensed Narrow Bold Italic bold i condensed Black black r normal Black Italic black i normal Oblique medium o normal BoldOblique bold o normal
Style names not listed in the above table are treated as "Regular".
Combination of a platform ID and an encoding ID corresponds to the registry property. For example, if a font has the combination (1 1), the registry property is 1-1. Some frequent combinations have a predefined registry property as below.
platform ID encoding ID registry property ----------- ----------- ----------------- 0 3 unicode-bmp 0 4 unicode-full 1 0 apple-roman 3 1 unicode-bmp 3 1 unicode-full
Thus, a font that has two combinations (1 0) and (3 1) corresponds to four font objects whose registries are 1-0, apple-roman, 3-1, and unicode-bmp.
The m17n library, if configured to use both the FreeType library and the OTF library, supports any OpenType fonts. The list of actually available fonts is created in the same way as in the case of FreeType fonts. If a fontset instructs to use an OpenType font via an FLT (Font Layout Table), and the FLT has an OTF-related command (e.g. otf:deva), the OTF library converts a character sequence to a glyph code sequence according to the OpenType layout tables of the font, and the FreeType library gives a bitmap image for each glyph.
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