<!DOCTYPE article PUBLIC "-//OASIS//DTD DocBook V3.1//EN" [
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+<!ENTITY fcatomic SYSTEM "fcatomic.sgml">
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+<!ENTITY fcfile SYSTEM "fcfile.sgml">
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+<!ENTITY fcformat SYSTEM "fcformat.sgml">
+<!ENTITY fcfreetype SYSTEM "fcfreetype.sgml">
+<!ENTITY fcinit SYSTEM "fcinit.sgml">
+<!ENTITY fclangset SYSTEM "fclangset.sgml">
+<!ENTITY fcmatrix SYSTEM "fcmatrix.sgml">
<!ENTITY fcobjectset SYSTEM "fcobjectset.sgml">
<!ENTITY fcobjecttype SYSTEM "fcobjecttype.sgml">
-<!ENTITY fcconstant SYSTEM "fcconstant.sgml">
-<!ENTITY fcblanks SYSTEM "fcblanks.sgml">
-<!ENTITY fcconfig SYSTEM "fcconfig.sgml">
+<!ENTITY fcpattern SYSTEM "fcpattern.sgml">
+<!ENTITY fcstring SYSTEM "fcstring.sgml">
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+<!ENTITY version SYSTEM "version.sgml">
]>
<!--
- $Id$
+ fontconfig/doc/local-fontconfig-devel.sgml
- Copyright © 2002 Keith Packard
+ Copyright © 2003 Keith Packard
Permission to use, copy, modify, distribute, and sell this software and its
documentation for any purpose is hereby granted without fee, 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 Keith Packard not be used in
+ documentation, and that the name of the author(s) not be used in
advertising or publicity pertaining to distribution of the software without
- specific, written prior permission. Keith Packard makes no
+ specific, written prior permission. The authors make no
representations about the suitability of this software for any purpose. It
is provided "as is" without express or implied warranty.
- KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ THE AUTHOR(S) DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
- EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ EVENT SHALL THE AUTHOR(S) 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.
-->
<article>
- <title>Fontconfig Developers Reference</title>
+ <title>Fontconfig Developers Reference, Version &version; </title>
<artheader>
<author>
<firstname>Keith</firstname>
</author>
<authorinitials>KRP</authorinitials>
<productname>Fontconfig</productname>
- <productnumber>2.1.91</productnumber>
+ <productnumber>&version;</productnumber>
<LegalNotice>
<simpara>
-Copyright © 2002 Keith Packard
+Copyright © 2002 Keith Packard
</simpara><simpara>
Permission to use, copy, modify, distribute, and sell this software and its
documentation for any purpose is hereby granted without fee, 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 Keith Packard not be used in
+documentation, and that the name of the author(s) not be used in
advertising or publicity pertaining to distribution of the software without
-specific, written prior permission. Keith Packard makes no
+specific, written prior permission. The authors make no
representations about the suitability of this software for any purpose. It
is provided "as is" without express or implied warranty.
</simpara><simpara>
-KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+THE AUTHOR(S) DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
-EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+EVENT SHALL THE AUTHOR(S) 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
</simpara>
</LegalNotice>
</artheader>
-<!--
-<refsynopsisdiv>
- <synopsis>
- #include <fontconfig/fontconfig.h>
- #include <fontconfig/fcfreetype.h>
- </synopsis>
-</refsynopsisdiv>
--->
<sect1><title>DESCRIPTION</title>
<para>
Fontconfig is a library designed to provide system-wide font configuration,
<sect2><title>FONT CONFIGURATION</title>
<para>
The configuration module consists of the FcConfig datatype, libexpat and
-FcConfigParse which walks over an XML tree and ammends a configuration with
+FcConfigParse which walks over an XML tree and amends a configuration with
data found within. From an external perspective, configuration of the
library consists of generating a valid XML tree and feeding that to
FcConfigParse. The only other mechanism provided to applications for
While font patterns may contain essentially any properties, there are some
well known properties with associated types. Fontconfig uses some of these
properties for font matching and font completion. Others are provided as a
-convenience for the applications rendering mechanism.
+convenience for the application's rendering mechanism.
</para>
<programlisting>
Property Definitions
- Property CPP Symbol Type Description
+ Property C Preprocessor Symbol Type Description
----------------------------------------------------
- family FC_FAMILY String Font family name
- style FC_STYLE String Font style. Overrides weight
- and slant
- slant FC_SLANT Int Italic, oblique or roman
- weight FC_WEIGHT Int Light, medium, demibold,
- bold or black
- size FC_SIZE Double Point size
- aspect FC_ASPECT Double Stretches glyphs horizontally
- before hinting
- pixelsize FC_PIXEL_SIZE Double Pixel size
- spacing FC_SPACING Int Proportional, monospace or
- charcell
- foundry FC_FOUNDRY String Font foundry name
- antialias FC_ANTIALIAS Bool Whether glyphs can be
- antialiased
- hinting FC_HINTING Bool Whether the rasterizer should
- use hinting
- verticallayout FC_VERTICAL_LAYOUT Bool Use vertical layout
- autohint FC_AUTOHINT Bool Use autohinter instead of
- normal hinter
- globaladvance FC_GLOBAL_ADVANCE Bool Use font global advance data
- file FC_FILE String The filename holding the font
- index FC_INDEX Int The index of the font within
- the file
- ftface FC_FT_FACE FT_Face Use the specified FreeType
- face object
- rasterizer FC_RASTERIZER String Which rasterizer is in use
- outline FC_OUTLINE Bool Whether the glyphs are outlines
- scalable FC_SCALABLE Bool Whether glyphs can be scaled
- scale FC_SCALE Double Scale factor for point->pixel
- conversions
- dpi FC_DPI Double Target dots per inch
- rgba FC_RGBA Int unknown, rgb, bgr, vrgb,
- vbgr, none - subpixel geometry
- minspace FC_MINSPACE Bool Eliminate leading from line
- spacing
- charset FC_CHARSET CharSet Unicode chars encoded by
- the font
- lang FC_LANG String List of RFC-3066-style
- languages this font supports
+ family FC_FAMILY String Font family names
+ familylang FC_FAMILYLANG String Language corresponding to
+ each family name
+ style FC_STYLE String Font style. Overrides weight
+ and slant
+ stylelang FC_STYLELANG String Language corresponding to
+ each style name
+ fullname FC_FULLNAME String Font face full name where
+ different from family and
+ family + style
+ fullnamelang FC_FULLNAMELANG String Language corresponding to
+ each fullname
+ slant FC_SLANT Int Italic, oblique or roman
+ weight FC_WEIGHT Int Light, medium, demibold,
+ bold or black
+ size FC_SIZE Double Point size
+ width FC_WIDTH Int Condensed, normal or expanded
+ aspect FC_ASPECT Double Stretches glyphs horizontally
+ before hinting
+ pixelsize FC_PIXEL_SIZE Double Pixel size
+ spacing FC_SPACING Int Proportional, dual-width,
+ monospace or charcell
+ foundry FC_FOUNDRY String Font foundry name
+ antialias FC_ANTIALIAS Bool Whether glyphs can be
+ antialiased
+ hinting FC_HINTING Bool Whether the rasterizer should
+ use hinting
+ hintstyle FC_HINT_STYLE Int Automatic hinting style
+ verticallayout FC_VERTICAL_LAYOUT Bool Use vertical layout
+ autohint FC_AUTOHINT Bool Use autohinter instead of
+ normal hinter
+ globaladvance FC_GLOBAL_ADVANCE Bool Use font global advance data
+ file FC_FILE String The filename holding the font
+ index FC_INDEX Int The index of the font within
+ the file
+ ftface FC_FT_FACE FT_Face Use the specified FreeType
+ face object
+ rasterizer FC_RASTERIZER String Which rasterizer is in use
+ outline FC_OUTLINE Bool Whether the glyphs are outlines
+ scalable FC_SCALABLE Bool Whether glyphs can be scaled
+ scale FC_SCALE Double Scale factor for point->pixel
+ conversions
+ dpi FC_DPI Double Target dots per inch
+ rgba FC_RGBA Int unknown, rgb, bgr, vrgb,
+ vbgr, none - subpixel geometry
+ lcdfilter FC_LCD_FILTER Int Type of LCD filter
+ minspace FC_MINSPACE Bool Eliminate leading from line
+ spacing
+ charset FC_CHARSET CharSet Unicode chars encoded by
+ the font
+ lang FC_LANG LangSet Set of RFC-3066-style
+ languages this font supports
+ fontversion FC_FONTVERSION Int Version number of the font
+ capability FC_CAPABILITY String List of layout capabilities in
+ the font
+ embolden FC_EMBOLDEN Bool Rasterizer should
+ synthetically embolden the font
</programlisting>
</sect2>
</sect1>
-<sect1><title>DATATYPES</title>
+<sect1><title>Datatypes</title>
<para>
-Fontconfig uses abstract datatypes to hide internal implementation details
+Fontconfig uses abstract data types to hide internal implementation details
for most data structures. A few structures are exposed where appropriate.
</para>
- <variablelist>
- <varlistentry>
- <term>FcChar8<term>
- <term>FcChar16<term>
- <term>FcChar32<term>
- <term>FcBool</term>
- <listitem>
- <para>
-These are primitive datatypes; the FcChar* types hold precisely the number
+ <sect2><title>FcChar8, FcChar16, FcChar32, FcBool</title>
+ <para>
+These are primitive data types; the FcChar* types hold precisely the number
of bits stated (if supported by the C implementation). FcBool holds
-one of two CPP symbols: FcFalse or FcTrue.
+one of two C preprocessor symbols: FcFalse or FcTrue.
</para>
- </listitem></varlistentry>
- <varlistentry><term>FcMatrix</term><listitem>
+ </sect2>
+ <sect2><title>FcMatrix</title>
<para>
An FcMatrix holds an affine transformation, usually used to reshape glyphs.
A small set of matrix operations are provided to manipulate these.
} FcMatrix;
</programlisting>
</para>
- </listitem></varlistentry>
- <varlistentry><term>FcCharSet</term><listitem>
+ </sect2>
+ <sect2><title>FcCharSet</title>
<para>
-An FcCharSet is an abstract type that holds the set of encoded unicode chars
+An FcCharSet is an abstract type that holds the set of encoded Unicode chars
in a font. Operations to build and compare these sets are provided.
</para>
- </listitem></varlistentry>
- <varlistentry><term>FcType</term><listitem>
+ </sect2>
+ <sect2><title>FcLangSet</title>
+ <para>
+An FcLangSet is an abstract type that holds the set of languages supported
+by a font. Operations to build and compare these sets are provided. These
+are computed for a font based on orthographic information built into the
+fontconfig library. Fontconfig has orthographies for all of the ISO 639-1
+languages except for MS, NA, PA, PS, QU, RN, RW, SD, SG, SN, SU and ZA. If
+you have orthographic information for any of these languages, please submit
+them.
+ </para>
+ </sect2>
+ <sect2><title>FcLangResult</title>
+ <para>
+An FcLangResult is an enumeration used to return the results of comparing
+two language strings or FcLangSet objects. FcLangEqual means the
+objects match language and territory. FcLangDifferentTerritory means
+the objects match in language but differ in territory.
+FcLangDifferentLang means the objects differ in language.
+ </para>
+ </sect2>
+ <sect2><title>FcType</title>
<para>
Tags the kind of data stored in an FcValue.
</para>
- </listitem></varlistentry>
- <varlistentry><term>FcValue</term><listitem>
+ </sect2>
+ <sect2><title>FcValue</title>
<para>
An FcValue object holds a single value with one of a number of different
types. The 'type' tag indicates which member is valid.
double d;
const FcMatrix *m;
const FcCharSet *c;
+ void *f;
+ const FcLangSet *l;
} u;
} FcValue;
</programlisting>
FcTypeVoid (none) (none)
FcTypeInteger i int
FcTypeDouble d double
- FcTypeString s char *
+ FcTypeString s FcChar8 *
FcTypeBool b b
FcTypeMatrix m FcMatrix *
FcTypeCharSet c FcCharSet *
+ FcTypeFTFace f void * (FT_Face)
+ FcTypeLangSet l FcLangSet *
</programlisting>
</para>
- </listitem></varlistentry>
- <varlistentry><term>FcPattern</term><listitem>
+ </sect2>
+ <sect2><title>FcPattern</title>
<para>
holds a set of names with associated value lists; each name refers to a
property of a font. FcPatterns are used as inputs to the matching code as
one or more values; conventionally all of the same type, although the
interface doesn't demand that.
</para>
- </listitem></varlistentry>
- <varlistentry><term>FcFontSet</term><listitem>
+ </sect2>
+ <sect2><title>FcFontSet</title>
<para>
<programlisting>
typedef struct _FcFontSet {
patterns in the 'fonts' array; 'sfont' is used to indicate the size of that
array.
</para>
- </listitem></varlistentry>
- <varlistentry><term>FcStrSet</term><term>FcStrList</term><listitem>
+ </sect2>
+ <sect2><title>FcStrSet, FcStrList</title>
<para>
FcStrSet holds a list of strings that can be appended to and enumerated.
Its unique characteristic is that the enumeration works even while strings
safely and correctly walk the list of strings even while that list is edited
in the middle of enumeration.
</para>
- </listitem></varlistentry>
- <varlistentry><term>FcObjectSet</term><listitem>
+ </sect2>
+ <sect2><title>FcObjectSet</title>
<para>
<programlisting>
typedef struct _FcObjectSet {
holds a set of names and is used to specify which fields from fonts are
placed in the the list of returned patterns when listing fonts.
</para>
- </listitem></varlistentry>
- <varlistentry><term>FcObjectType</term><listitem>
+ </sect2>
+ <sect2><title>FcObjectType</title>
<para>
<programlisting>
typedef struct _FcObjectType {
Applications can add new object types so that font names may contain the new
elements.
</para>
- </listitem></varlistentry>
- <varlistentry><term>FcConstant</term><listitem>
+ </sect2>
+ <sect2><title>FcConstant</title>
<para>
<programlisting>
typedef struct _FcConstant {
Provides for symbolic constants for new pattern elements. When 'name' is
seen in a font name, an 'object' element is created with value 'value'.
</para>
- </listitem></varlistentry>
- <varlistentry><term>FcBlanks</term><listitem>
+ </sect2>
+ <sect2><title>FcBlanks</title>
<para>
holds a list of Unicode chars which are expected to be blank; unexpectedly
blank chars are assumed to be invalid and are elided from the charset
associated with the font.
</para>
- </listitem></varlistentry>
- <varlistentry><term>FcFileCache</term><listitem>
+ </sect2>
+ <sect2><title>FcFileCache</title>
<para>
holds the per-user cache information for use while loading the font
database. This is built automatically for the current configuration when
that is loaded. Applications must always pass '0' when one is requested.
</para>
- </listitem></varlistentry>
- <varlistentry><term>FcConfig</term><listitem>
+ </sect2>
+ <sect2><title>FcConfig</title>
<para>
holds a complete configuration of the library; there is one default
configuration, other can be constructed from XML data structures. All
argument; passing 0 uses the default configuration. FcConfig objects hold two
sets of fonts, the first contains those specified by the configuration, the
second set holds those added by the application at run-time. Interfaces
-that need to reference a particulat set use one of the FcSetName enumerated
+that need to reference a particular set use one of the FcSetName enumerated
values.
</para>
- </listitem></varlistentry>
- <varlistentry><term>FcSetName</term><listitem>
+ </sect2>
+ <sect2><title>FcSetName</title>
<para>
Specifies one of the two sets of fonts available in a configuration;
FcSetSystem for those fonts specified in the configuration and
FcSetApplication which holds fonts provided by the application.
</para>
- </listitem></varlistentry>
- <varlistentry><term>FcResult</term><listitem>
+ </sect2>
+ <sect2><title>FcResult</title>
<para>
Used as a return type for functions manipulating FcPattern objects.
<programlisting>
FcResultTypeMismatch Object exists, but the type doesn't match
FcResultNoId Object exists, but has fewer values
than specified
+ FcResultOutOfMemory malloc failed
</programlisting>
</para>
- </listitem></varlistentry>
- <varlistentry><term>FcAtomic</term><listitem>
+ </sect2>
+ <sect2><title>FcAtomic</title>
<para>
-Used for locking access to config files. Provides a safe way to update
+Used for locking access to configuration files. Provides a safe way to update
configuration files.
</para>
- </listitem></varlistentry>
- </variablelist>
+ </sect2>
+ <sect2><title>FcCache</title>
+ <para>
+Holds information about the fonts contained in a single directory. Normal
+applications need not worry about this as caches for font access are
+automatically managed by the library. Applications dealing with cache
+management may want to use some of these objects in their work, however the
+included 'fc-cache' program generally suffices for all of that.
+ </para>
+ </sect2>
</sect1>
<sect1><title>FUNCTIONS</title>
<para>
-Functions are grouped by the main datatype involved
+These are grouped by functionality, often using the main data type being
+manipulated.
</para>
- <sect2><title>FcMatrix</title>
+ <sect2><title>Initialization</title>
<para>
-FcMatrix structures hold an affine transformation in matrix form.
+These functions provide some control over how the library is initialized.
</para>
- &fcmatrix;
+ &fcinit;
</sect2>
- <sect2><title>FcCharSet</title>
+ <sect2><title>FcPattern</title>
<para>
-An FcCharSet is a boolean array indicating a set of unicode chars. Those
-associated with a font are marked constant and cannot be edited.
-FcCharSets may be reference counted internally to reduce memory consumption;
-this may be visible to applications as the result of FcCharSetCopy may
-return it's argument, and that CharSet may remain unmodifiable.
+An FcPattern is an opaque type that holds both patterns to match against the
+available fonts, as well as the information about each font.
</para>
- &fccharset;
+ &fcpattern;
+ &fcformat;
+ </sect2>
+ <sect2><title>FcFontSet</title>
+ <para>
+An FcFontSet simply holds a list of patterns; these are used to return the
+results of listing available fonts.
+ </para>
+ &fcfontset;
+ </sect2>
+ <sect2><title>FcObjectSet</title>
+ <para>
+An FcObjectSet holds a list of pattern property names; it is used to
+indicate which properties are to be returned in the patterns from
+FcFontList.
+ </para>
+ &fcobjectset;
+ </sect2>
+ <sect2><title>FreeType specific functions</title>
+ <para>
+While the fontconfig library doesn't insist that FreeType be used as the
+rasterization mechanism for fonts, it does provide some convenience
+functions.
+ </para>
+ &fcfreetype;
</sect2>
<sect2><title>FcValue</title>
<para>
</para>
&fcvalue;
</sect2>
- <sect2><title>FcPattern</title>
+ <sect2><title>FcCharSet</title>
<para>
-An FcPattern is an opaque type that holds both patterns to match against the
-available fonts, as well as the information about each font.
+An FcCharSet is a boolean array indicating a set of Unicode chars. Those
+associated with a font are marked constant and cannot be edited.
+FcCharSets may be reference counted internally to reduce memory consumption;
+this may be visible to applications as the result of FcCharSetCopy may
+return it's argument, and that CharSet may remain unmodifiable.
</para>
- &fcpattern;
+ &fccharset;
</sect2>
- <sect2><title>FcFontSet</title>
+ <sect2><title>FcLangSet</title>
<para>
-An FcFontSet simply holds a list of patterns; these are used to return the
-results of listing available fonts.
+An FcLangSet is a set of language names (each of which include language and
+an optional territory). They are used when selecting fonts to indicate which
+languages the fonts need to support. Each font is marked, using language
+orthography information built into fontconfig, with the set of supported
+languages.
</para>
- &fcfontset;
+ &fclangset;
</sect2>
- <sect2><title>FcObjectSet</title>
+ <sect2><title>FcMatrix</title>
<para>
-An FcObjectSet holds a list of pattern property names; it is used to
-indiciate which properties are to be returned in the patterns from
-FcFontList.
+FcMatrix structures hold an affine transformation in matrix form.
</para>
- &fcobjectset;
+ &fcmatrix;
+ </sect2>
+ <sect2><title>FcConfig</title>
+ <para>
+An FcConfig object holds the internal representation of a configuration.
+There is a default configuration which applications may use by passing 0 to
+any function using the data within an FcConfig.
+ </para>
+ &fcconfig;
</sect2>
<sect2><title>FcObjectType</title>
<para>
-Provides for applcation-specified font name object types so that new
+Provides for application-specified font name object types so that new
pattern elements can be generated from font names.
</para>
&fcobjecttype;
</para>
&fcblanks;
</sect2>
- <sect2><title>FcConfig</title>
+ <sect2><title>FcAtomic</title>
<para>
-An FcConfig object holds the internal representation of a configuration.
-There is a default configuration which applications may use by passing 0 to
-any function using the data within an FcConfig.
+These functions provide a safe way to update configuration files, allowing ongoing
+reading of the old configuration file while locked for writing and ensuring that a
+consistent and complete version of the configuration file is always available.
</para>
- &fcconfig;
+ &fcatomic;
</sect2>
- <sect2><title>Initialization</title>
+ <sect2><title>File and Directory routines</title>
<para>
-These functions provide some control over how the library is initialized.
+These routines work with font files and directories, including font
+directory cache files.
</para>
- <variablelist>
- <varlistentry><term>
-FcConfig *FcInitLoadConfig (void);
- </term><listitem><para>
-Loads the default configuration file and returns the resulting configuration.
-Does not load any font information.
- </para></listitem></varlistentry>
- <varlistentry><term>
-FcConfig *FcInitLoadConfigAndFonts (void);
- </term><listitem><para>
-Loads the default configuration file and builds information about the
-available fonts. Returns the resulting configuration.
- </para></listitem></varlistentry>
- <varlistentry><term>
-FcBool FcInit (void);
- </term><listitem><para>
-Loads the default configuration file and the fonts referenced therein and
-sets the default configuration to that result. Returns whether this
-process succeeded or not. If the default configuration has already
-been loaded, this routine does nothing and returns FcTrue.
- </para></listitem></varlistentry>
- <varlistentry><term>
-int FcGetVersion (void);
- </term><listitem><para>
-Returns the version number of the library.
- </para></listitem></varlistentry>
- <varlistentry><term>
-FcBool FcInitReinitialize (void);
- </term><listitem><para>
-Forces the default configuration file to be reloaded and resets the default
-configuration.
- </para></listitem></varlistentry>
- <varlistentry><term>
-FcBool FcInitBringUptoDate (void);
- </term><listitem><para>
-Checks the rescan interval in the default configuration, checking the
-configuration if the interval has passed and reloading the configuration if
-when any changes are detected.
- </para></listitem></varlistentry>
- </variablelist></sect2>
- <sect2><title>FcAtomic</title>
- <para>
-These functions provide a safe way to update config files, allowing ongoing
-reading of the old config file while locked for writing and ensuring that a
-consistent and complete version of the config file is always available.
- </para>
- <variablelist>
- <varlistentry><term>
-FcAtomic * FcAtomicCreate (const FcChar8 *file);
- </term><listitem><para>
-Creates a data structure containing data needed to control access to 'file'.
-Writing is done to a separate file. Once that file is complete, the original
-configuration file is atomically replaced so that reading process always see
-a consistent and complete file without the need to lock for reading.
- </para></listitem></varlistentry>
- <varlistentry><term>
-FcBool FcAtomicLock (FcAtomic *atomic);
- </term><listitem><para>
-Attempts to lock the file referenced by 'atomic'. Returns FcFalse if the
-file is locked by another process, else returns FcTrue and leaves the file
-locked.
- </para></listitem></varlistentry>
- <varlistentry><term>
-FcChar8 *FcAtomicNewFile (FcAtomic *atomic);
- </term><listitem><para>
-Returns the filename for writing a new version of the file referenced
-by 'atomic'.
- </para></listitem></varlistentry>
- <varlistentry><term>
-FcChar8 *FcAtomicOrigFile (FcAtomic *atomic);
- </term><listitem><para>
-Returns the file refernced by 'atomic'.
- </para></listitem></varlistentry>
- <varlistentry><term>
-FcBool FcAtomicReplaceOrig (FcAtomic *atomic);
- </term><listitem><para>
-Replaces the original file referenced by 'atomic' with the new file.
- </para></listitem></varlistentry>
- <varlistentry><term>
-void FcAtomicDeleteNew (FcAtomic *atomic);
- </term><listitem><para>
-Deletes the new file.
- </para></listitem></varlistentry>
- <varlistentry><term>
-void FcAtomicUnlock (FcAtomic *atomic);
- </term><listitem><para>
-Unlocks the file.
- </para></listitem></varlistentry>
- <varlistentry><term>
-void FcAtomicDestroy (FcAtomic *atomic);
- </term><listitem><para>
-Destroys 'atomic'.
- </para></listitem></varlistentry>
- </variablelist></sect2>
- <sect2><title>FreeType specific functions</title>
+ &fcfile;
+ &fcdircache;
+ </sect2>
+ <sect2><title>FcCache routines</title>
<para>
- <programlisting>
-#include <fontconfig/fcfreetype.h>
- </programlisting>
-While the fontconfig library doesn't insist that FreeType be used as the
-rasterization mechanism for fonts, it does provide some convenience
-functions.
+These routines work with font directory caches, accessing their contents in
+limited ways. It is not expected that normal applications will need to use
+these functions.
</para>
- <variablelist>
- <varlistentry><term>
-FT_UInt FcFreeTypeCharIndex (FT_Face face, FcChar32 ucs4);
- </term><listitem><para>
-Maps a Unicode char to a glyph index. This function uses information from
-several possible underlying encoding tables to work around broken fonts.
-As a result, this function isn't designed to be used in performance
-sensitive areas; results from this function are intended to be cached by
-higher level functions.
- </para></listitem></varlistentry>
- <varlistentry><term>
-FcCharSet *FcFreeTypeCharSet (FT_Face face, FcBlanks *blanks) Scans a
- </term><listitem><para>
-FreeType face and returns the set of encoded Unicode chars. This scans
-several encoding tables to build as complete a list as possible.
-If 'blanks' is not 0, the glyphs in the font are examined and any blank glyphs
-not in 'blanks' are not placed in the returned FcCharSet.
- </para></listitem></varlistentry>
- <varlistentry><term>
-FcPattern *FcFreeTypeQuery (const char *file, int id, FcBlanks *blanks, int *count);
- </term><listitem><para>
-Constructs a pattern representing the 'id'th font in 'file'. The number
-of fonts in 'file' is returned in 'count'.
- </para></listitem></varlistentry>
- </variablelist></sect2>
- <sect2><title>XML specific functions</title>
- <variablelist>
- <varlistentry><term>
-FcBool FcConfigParseAndLoad (FcConfig *config, const FcChar8 *file, FcBool complain);
- </term><listitem><para>
-Walks the configuration in 'file' and constructs the internal representation
-in 'config'. Any include files referenced from within 'file' will be loaded
-with FcConfigLoad and also parsed. If 'complain' is FcFalse, no warning
-will be displayed if 'file' does not exist.
- </para></listitem></varlistentry>
- </variablelist></sect2>
- <sect2><title>File and Directory routines</title>
- <variablelist>
- <varlistentry><term>
-FcBool FcFileScan (FcFontSet *set, FcStrSet *dirs, FcFileCache *cache, FcBlanks *blanks, const char *file, FcBool force);
- </term><listitem><para>
-Scans a single file and adds all fonts found to 'set'. If 'force' is FcTrue,
-then the file is scanned even if associated information is found in 'cache'.
-If 'file' is a directory, it is added to 'dirs'.
- </para></listitem></varlistentry>
- <varlistentry><term>
-FcBool FcDirScan (FcFontSet *set, FcStrSet *dirs, FcFileCache *cache, FcBlanks *blanks, const char *dir, FcBool force);
- </term><listitem><para>
-Scans an entire directory and adds all fonts found to 'set'. If 'force' is
-FcTrue, then the directory and all files within it are scanned even if
-information is present in the per-directory cache file or 'cache'. Any
-subdirectories found are added to 'dirs'.
- </para></listitem></varlistentry>
- <varlistentry><term>
-FcBool FcDirSave (FcFontSet *set, FcStrSet *dirs, const char *dir);
- </term><listitem><para>
-Creates the per-directory cache file for 'dir' and populates it with the
-fonts in 'set' and subdirectories in 'dirs'.
- </para></listitem></varlistentry>
- <varlistentry><term>
-FcBool FcDirCacheValid (const FcChar8 *cache_file);
- </term><listitem><para>
-Returns FcTrue if 'cache_file' is no older than the directory containing it,
-else FcFalse.
- </para></listitem></varlistentry>
- </variablelist></sect2>
+ &fccache;
+ </sect2>
<sect2><title>FcStrSet and FcStrList</title>
<para>
A data structure for enumerating strings, used to list directories while
scanning the configuration as directories are added while scanning.
</para>
- <variablelist>
- <varlistentry><term>
-FcStrSet *FcStrSetCreate (void);
- </term><listitem><para>
-Create an empty set.
- </para></listitem></varlistentry>
- <varlistentry><term>
-FcBool FcStrSetMember (FcStrSet *set, const FcChar8 *s);
- </term><listitem><para>
-Returns whether 's' is a member of 'set'.
- </para></listitem></varlistentry>
- <varlistentry><term>
-FcBool FcStrSetAdd (FcStrSet *set, const FcChar8 *s);
- </term><listitem><para>
-Adds a copy of 's' to 'set'.
- </para></listitem></varlistentry>
- <varlistentry><term>
-FcBool FcStrSetAddFilename (FcStrSet *set, const FcChar8 *s);
- </term><listitem><para>
-Adds a copy 's' to 'set', The copy is created with FcStrCopyFilename
-so that leading '~' values are replaced with the value of the HOME
-environment variable.
- </para></listitem></varlistentry>
- <varlistentry><term>
-FcBool FcStrSetDel (FcStrSet *set, const FcChar8 *s);
- </term><listitem><para>
-Removes 's' from 'set', returning FcTrue if 's' was a member else FcFalse.
- </para></listitem></varlistentry>
- <varlistentry><term>
-void FcStrSetDestroy (FcStrSet *set);
- </term><listitem><para>
-Destroys 'set'.
- </para></listitem></varlistentry>
- <varlistentry><term>
-FcStrList *FcStrListCreate (FcStrSet *set);
- </term><listitem><para>
-Creates an enumerator to list the strings in 'set'.
- </para></listitem></varlistentry>
- <varlistentry><term>
-FcChar8 *FcStrListNext (FcStrList *list);
- </term><listitem><para>
-Returns the next string in 'set'.
- </para></listitem></varlistentry>
- <varlistentry><term>
-void FcStrListDone (FcStrList *list);
- </term><listitem><para>
-Destroys the enumerator 'list'.
- </para></listitem></varlistentry>
- </variablelist></sect2>
+ &fcstrset;
+ </sect2>
<sect2><title>String utilities</title>
- <variablelist>
- <varlistentry><term>
-int FcUtf8ToUcs4 (FcChar8 *src, FcChar32 *dst, int len);
- </term><listitem>
- <para>
-Converts the next Unicode char from 'src' into 'dst' and returns the number
-of bytes containing the char. 'src' nust be at least 'len' bytes long.
- </para></listitem></varlistentry>
- <varlistentry><term>
-int FcUcs4ToUtf8 (FcChar32 src, FcChar8 dst[FC_UTF8_MAX_LEN]);
- </term><listitem><para>
-Converts the Unicode char from 'src' into 'dst' and returns the
-number of bytes needed to encode the char.
- </para></listitem></varlistentry>
- <varlistentry><term>
-FcBool FcUtf8Len (FcChar8 *src, int len, int *nchar, int *wchar);
- </term><listitem><para>
-Counts the number of Unicode chars in 'len' bytes of 'src'. Places that
-count in 'nchar'. 'wchar' contains 1, 2 or 4 depending on the number of
-bytes needed to hold the largest unicode char counted. The return value
-indicates whether 'src' is a well-formed UTF8 string.
- </para></listitem></varlistentry>
- <varlistentry><term>
-int FcUtf16ToUcs4 (FcChar8 *src, FcEndian endian, FcChar32 *dst, int len);
- </term><listitem><para>
-Converts the next Unicode char from 'src' into 'dst' and returns the
-number of bytes containing the char. 'src' must be at least 'len' bytes
-long. Bytes of 'src' are combined into 16-bit units according to 'endian'.
- </para></listitem></varlistentry>
- <varlistentry><term>
-FcBool FcUtf16Len (FcChar8 *src, FcEndian endian, int len, int *nchar, int *wchar);
- </term><listitem><para>
-Counts the number of Unicode chars in 'len' bytes of 'src'. Bytes of 'src'
-are combined into 16-bit units according to 'endian'. Places that
-count in 'nchar'. 'wchar' contains 1, 2 or 4 depending on the number of
-bytes needed to hold the largest unicode char counted. The return value
-indicates whether 'string' is a well-formed UTF16 string.
- </para></listitem></varlistentry>
- <varlistentry><term>
-FcChar8 *FcStrCopy (const FcChar8 *s);
- </term><listitem><para>
-Allocates memory, copies 's' and returns the resulting buffer. Yes, this
-is 'strdup', but that function isn't available on every platform.
- </para></listitem></varlistentry>
- <varlistentry><term>
-FcChar8 *FcStrCopyFilename (const FcChar8 *s);
- </term><listitem><para>
-Just like FcStrCopy except that it converts any leading '~' characters
-in 's' to the value of the HOME environment variable.
- </para></listitem></varlistentry>
- <varlistentry><term>
-int FcStrCmpIgnoreCase (const char *s1, const char *s2);
- </term><listitem><para>
-Returns the usual <0, 0, >0 result of comparing 's1' and 's2'. This test
-is case-insensitive in the ASCII range and will operate properly with UTF8
-encoded strings, although it does not check for well formed strings.
- </para></listitem></varlistentry>
- <varlistentry><term>
-FcChar8 *FcStrDirname (const FcChar8 *file);
- </term><listitem><para>
-Returns the directory containing 'file'.
- </para></listitem></varlistentry>
- <varlistentry><term>
-FcChar8 *FcStrBasename (const FcChar8 *file);
- </term><listitem><para>
-Returns the filename of 'file' stripped of any leading directory names.
- </para></listitem></varlistentry>
- </variablelist></sect2>
+ <para>
+Fontconfig manipulates many UTF-8 strings represented with the FcChar8 type.
+These functions are exposed to help applications deal with these UTF-8
+strings in a locale-insensitive manner.
+ </para>
+ &fcstring;
+ </sect2>
</sect1>
</article>
git.wh0rd.org / fontconfig.git / blobdiff