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Fontconfig Developers Reference, Version 2.8.0
Copyright © 2002 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 advertising or publicity pertaining to
distribution of the software without specific, written prior permission. Keith
Packard makes no representations about the suitability of this software for any
purpose. It is provided "as is" without express or implied warranty.
THE AUTHOR(S) DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO 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.
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Table of Contents
DESCRIPTION
FUNCTIONAL OVERVIEW
Datatypes
FUNCTIONS
DESCRIPTION
Fontconfig is a library designed to provide system-wide font configuration,
customization and application access.
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FUNCTIONAL OVERVIEW
Fontconfig contains two essential modules, the configuration module which
builds an internal configuration from XML files and the matching module which
accepts font patterns and returns the nearest matching font.
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FONT CONFIGURATION
The configuration module consists of the FcConfig datatype, libexpat and
FcConfigParse which walks over an XML tree and ammends 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 changing the running
configuration is to add fonts and directories to the list of
application-provided font files.
The intent is to make font configurations relatively static, and shared by as
many applications as possible. It is hoped that this will lead to more stable
font selection when passing names from one application to another. XML was
chosen as a configuration file format because it provides a format which is
easy for external agents to edit while retaining the correct structure and
syntax.
Font configuration is separate from font matching; applications needing to do
their own matching can access the available fonts from the library and perform
private matching. The intent is to permit applications to pick and choose
appropriate functionality from the library instead of forcing them to choose
between this library and a private configuration mechanism. The hope is that
this will ensure that configuration of fonts for all applications can be
centralized in one place. Centralizing font configuration will simplify and
regularize font installation and customization.
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FONT PROPERTIES
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.
Property Definitions
Property CPP Symbol Type Description
----------------------------------------------------
family FC_FAMILY String Font family names
familylang FC_FAMILYLANG String Language cooresponding to
each family name
style FC_STYLE String Font style. Overrides weight
and slant
stylelang FC_STYLELANG String Language cooresponding to
each style name
fullname FC_FULLNAME String Font face full name where
different from family and
family + style
fullnamelang FC_FULLNAMELANG String Language cooresponding 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
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Datatypes
Fontconfig uses abstract datatypes to hide internal implementation details for
most data structures. A few structures are exposed where appropriate.
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FcChar8, FcChar16, FcChar32, FcBool
These are primitive datatypes; 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.
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FcMatrix
An FcMatrix holds an affine transformation, usually used to reshape glyphs. A
small set of matrix operations are provided to manipulate these.
typedef struct _FcMatrix {
double xx, xy, yx, yy;
} FcMatrix;
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FcCharSet
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.
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FcLangSet
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.
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FcLangResult
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.
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FcType
Tags the kind of data stored in an FcValue.
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FcValue
An FcValue object holds a single value with one of a number of different types.
The 'type' tag indicates which member is valid.
typedef struct _FcValue {
FcType type;
union {
const FcChar8 *s;
int i;
FcBool b;
double d;
const FcMatrix *m;
const FcCharSet *c;
void *f;
const FcLangSet *l;
} u;
} FcValue;
FcValue Members
Type Union member Datatype
--------------------------------
FcTypeVoid (none) (none)
FcTypeInteger i int
FcTypeDouble d double
FcTypeString s FcChar8 *
FcTypeBool b b
FcTypeMatrix m FcMatrix *
FcTypeCharSet c FcCharSet *
FcTypeFTFace f void * (FT_Face)
FcTypeLangSet l FcLangSet *
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FcPattern
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 well
as holding information about specific fonts. Each property can hold one or more
values; conventionally all of the same type, although the interface doesn't
demand that.
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FcFontSet
typedef struct _FcFontSet {
int nfont;
int sfont;
FcPattern **fonts;
} FcFontSet;
An FcFontSet contains a list of FcPatterns. Internally fontconfig uses this
data structure to hold sets of fonts. Externally, fontconfig returns the
results of listing fonts in this format. 'nfont' holds the number of patterns
in the 'fonts' array; 'sfont' is used to indicate the size of that array.
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FcStrSet, FcStrList
FcStrSet holds a list of strings that can be appended to and enumerated. Its
unique characteristic is that the enumeration works even while strings are
appended during enumeration. FcStrList is used during enumeration to safely and
correctly walk the list of strings even while that list is edited in the middle
of enumeration.
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FcObjectSet
typedef struct _FcObjectSet {
int nobject;
int sobject;
const char **objects;
} 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.
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FcObjectType
typedef struct _FcObjectType {
const char *object;
FcType type;
} FcObjectType;
marks the type of a pattern element generated when parsing font names.
Applications can add new object types so that font names may contain the new
elements.
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FcConstant
typedef struct _FcConstant {
const FcChar8 *name;
const char *object;
int value;
} 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'.
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FcBlanks
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.
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FcFileCache
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.
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FcConfig
holds a complete configuration of the library; there is one default
configuration, other can be constructed from XML data structures. All public
entry points that need global data can take an optional FcConfig* 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 values.
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FcSetName
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.
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FcResult
Used as a return type for functions manipulating FcPattern objects.
FcResult Values
Result Code Meaning
-----------------------------------------------------------
FcResultMatch Object exists with the specified ID
FcResultNoMatch Object doesn't exist at all
FcResultTypeMismatch Object exists, but the type doesn't match
FcResultNoId Object exists, but has fewer values
than specified
FcResultOutOfMemory Malloc failed
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FcAtomic
Used for locking access to config files. Provides a safe way to update
configuration files.
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FcCache
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.
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FUNCTIONS
These are grouped by functionality, often using the main datatype being
manipulated.
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Initialization
Table of Contents
FcInitLoadConfig -- load configuration
FcInitLoadConfigAndFonts -- load configuration and font data
FcInit -- initialize fontconfig library
FcFini -- finalize fonconfig library
FcGetVersion -- library version number
FcInitReinitialize -- re-initialize library
FcInitBringUptoDate -- reload configuration files if needed
These functions provide some control over how the library is initialized.
FcInitLoadConfig
Name
FcInitLoadConfig -- load configuration
Synopsis
#include <fontconfig.h>
FcConfig * FcInitLoadConfig(void);
Description
Loads the default configuration file and returns the resulting configuration.
Does not load any font information.
Version
Fontconfig version 2.8.0
FcInitLoadConfigAndFonts
Name
FcInitLoadConfigAndFonts -- load configuration and font data
Synopsis
#include <fontconfig.h>
FcConfig * FcInitLoadConfigAndFonts(void);
Description
Loads the default configuration file and builds information about the available
fonts. Returns the resulting configuration.
Version
Fontconfig version 2.8.0
FcInit
Name
FcInit -- initialize fontconfig library
Synopsis
#include <fontconfig.h>
FcBool FcInit(void);
Description
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.
Version
Fontconfig version 2.8.0
FcFini
Name
FcFini -- finalize fonconfig library
Synopsis
#include <fontconfig.h>
void FcFini(void);
Description
Frees all data structures allocated by previous calls to fontconfig functions.
Fontconfig returns to an uninitialized state, requiring a new call to one of
the FcInit functions before any other fontconfig function may be called.
Version
Fontconfig version 2.8.0
FcGetVersion
Name
FcGetVersion -- library version number
Synopsis
#include <fontconfig.h>
int FcGetVersion(void);
Description
Returns the version number of the library.
Version
Fontconfig version 2.8.0
FcInitReinitialize
Name
FcInitReinitialize -- re-initialize library
Synopsis
#include <fontconfig.h>
FcBool FcInitReinitialize(void);
Description
Forces the default configuration file to be reloaded and resets the default
configuration. Returns FcFalse if the configuration cannot be reloaded (due to
config file errors, allocation failures or other issues) and leaves the
existing configuration unchanged. Otherwise returns FcTrue.
Version
Fontconfig version 2.8.0
FcInitBringUptoDate
Name
FcInitBringUptoDate -- reload configuration files if needed
Synopsis
#include <fontconfig.h>
FcBool FcInitBringUptoDate(void);
Description
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. Returns FcFalse if the configuration cannot be
reloaded (see FcInitReinitialize). Otherwise returns FcTrue.
Version
Fontconfig version 2.8.0
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FcPattern
Table of Contents
FcPatternCreate -- Create a pattern
FcPatternDuplicate -- Copy a pattern
FcPatternReference -- Increment pattern reference count
FcPatternDestroy -- Destroy a pattern
FcPatternEqual -- Compare patterns
FcPatternEqualSubset -- Compare portions of patterns
FcPatternFilter -- Filter the objects of pattern
FcPatternHash -- Compute a pattern hash value
FcPatternAdd -- Add a value to a pattern
FcPatternAddWeak -- Add a value to a pattern with weak binding
FcPatternAdd-Type -- Add a typed value to a pattern
FcPatternGet -- Return a value from a pattern
FcPatternGet-Type -- Return a typed value from a pattern
FcPatternBuild -- Create patterns from arguments
FcPatternDel -- Delete a property from a pattern
FcPatternRemove -- Remove one object of the specified type from the pattern
FcPatternPrint -- Print a pattern for debugging
FcDefaultSubstitute -- Perform default substitutions in a pattern
FcNameParse -- Parse a pattern string
FcNameUnparse -- Convert a pattern back into a string that can be parsed
FcPatternFormat -- Format a pattern into a string according to a format
specifier
An FcPattern is an opaque type that holds both patterns to match against the
available fonts, as well as the information about each font.
FcPatternCreate
Name
FcPatternCreate -- Create a pattern
Synopsis
#include <fontconfig.h>
FcPattern * FcPatternCreate(void);
Description
Creates a pattern with no properties; used to build patterns from scratch.
Version
Fontconfig version 2.8.0
FcPatternDuplicate
Name
FcPatternDuplicate -- Copy a pattern
Synopsis
#include <fontconfig.h>
FcPattern * FcPatternDuplicate(const FcPattern *p);
Description
Copy a pattern, returning a new pattern that matches p. Each pattern may be
modified without affecting the other.
Version
Fontconfig version 2.8.0
FcPatternReference
Name
FcPatternReference -- Increment pattern reference count
Synopsis
#include <fontconfig.h>
void FcPatternReference(FcPattern *p);
Description
Add another reference to p. Patterns are freed only when the reference count
reaches zero.
Version
Fontconfig version 2.8.0
FcPatternDestroy
Name
FcPatternDestroy -- Destroy a pattern
Synopsis
#include <fontconfig.h>
void FcPatternDestroy(FcPattern *p);
Description
Decrement the pattern reference count. If all references are gone, destroys the
pattern, in the process destroying all related values.
Version
Fontconfig version 2.8.0
FcPatternEqual
Name
FcPatternEqual -- Compare patterns
Synopsis
#include <fontconfig.h>
FcBool FcPatternEqual(const FcPattern *pa, const FcPattern *pb);
Description
Returns whether pa and pb are exactly alike.
Version
Fontconfig version 2.8.0
FcPatternEqualSubset
Name
FcPatternEqualSubset -- Compare portions of patterns
Synopsis
#include <fontconfig.h>
FcBool FcPatternEqualSubset(const FcPattern *pa, const FcPattern *pb, const
FcObjectSet *os);
Description
Returns whether pa and pb have exactly the same values for all of the objects
in os.
Version
Fontconfig version 2.8.0
FcPatternFilter
Name
FcPatternFilter -- Filter the objects of pattern
Synopsis
#include <fontconfig.h>
FcPattern * FcPatternFilter(FcPattern *p, const FcObjectSet *);
Description
Returns a new pattern that only has those objects from p that are in os. If os
is NULL, a duplicate of p is returned.
Version
Fontconfig version 2.8.0
FcPatternHash
Name
FcPatternHash -- Compute a pattern hash value
Synopsis
#include <fontconfig.h>
FcChar32 FcPatternHash(const FcPattern *p);
Description
Returns a 32-bit number which is the same for any two patterns which are equal.
Version
Fontconfig version 2.8.0
FcPatternAdd
Name
FcPatternAdd -- Add a value to a pattern
Synopsis
#include <fontconfig.h>
FcBool FcPatternAdd(FcPattern *p, const char *object, FcValue value, FcBool
append);
Description
Adds a single value to the list of values associated with the property named
`object. If `append is FcTrue, the value is added at the end of any existing
list, otherwise it is inserted at the begining. `value' is saved (with
FcValueSave) when inserted into the pattern so that the library retains no
reference to any application-supplied data structure.
Version
Fontconfig version 2.8.0
FcPatternAddWeak
Name
FcPatternAddWeak -- Add a value to a pattern with weak binding
Synopsis
#include <fontconfig.h>
FcBool FcPatternAddWeak(FcPattern *p, const char *object, FcValue value, FcBool
append);
Description
FcPatternAddWeak is essentially the same as FcPatternAdd except that any values
added to the list have binding weak instead of strong.
Version
Fontconfig version 2.8.0
FcPatternAdd-Type
Name
FcPatternAddInteger, FcPatternAddDouble, FcPatternAddString,
FcPatternAddMatrix, FcPatternAddCharSet, FcPatternAddBool, FcPatternAddFTFace,
FcPatternAddLangSet -- Add a typed value to a pattern
Synopsis
#include <fontconfig.h>
FcBool FcPatternAddInteger(FcPattern *p, const char *object, int i);
FcBool FcPatternAddDouble(FcPattern *p, const char *object, double d);
FcBool FcPatternAddString(FcPattern *p, const char *object, const FcChar8 *s);
FcBool FcPatternAddMatrix(FcPattern *p, const char *object, const FcMatrix *m);
FcBool FcPatternAddCharSet(FcPattern *p, const char *object, const FcCharSet *c
);
FcBool FcPatternAddBool(FcPattern *p, const char *object, FcBool b);
FcBool FcPatternAddFTFace(FcPattern *p, const char *object, const FT_Facef);
FcBool FcPatternAddLangSet(FcPattern *p, const char *object, const FcLangSet *l
);
Description
These are all convenience functions that insert objects of the specified type
into the pattern. Use these in preference to FcPatternAdd as they will provide
compile-time typechecking. These all append values to any existing list of
values.
Version
Fontconfig version 2.8.0
FcPatternGet
Name
FcPatternGet -- Return a value from a pattern
Synopsis
#include <fontconfig.h>
FcResult FcPatternGet(FcPattern *p, const char *object, int id, FcValue *v);
Description
Returns in v the id'th value associated with the property object. The value
returned is not a copy, but rather refers to the data stored within the pattern
directly. Applications must not free this value.
Version
Fontconfig version 2.8.0
FcPatternGet-Type
Name
FcPatternGetInteger, FcPatternGetDouble, FcPatternGetString,
FcPatternGetMatrix, FcPatternGetCharSet, FcPatternGetBool, FcPatternGetFTFace,
FcPatternGetLangSet -- Return a typed value from a pattern
Synopsis
#include <fontconfig.h>
FcResult FcPatternGetInteger(FcPattern *p, const char *object, int n, int *i);
FcResult FcPatternGetDouble(FcPattern *p, const char *object, int n, double *d
);
FcResult FcPatternGetString(FcPattern *p, const char *object, int n, FcChar8 **
s);
FcResult FcPatternGetMatrix(FcPattern *p, const char *object, int n, FcMatrix
**s);
FcResult FcPatternGetCharSet(FcPattern *p, const char *object, int n, FcCharSet
**c);
FcResult FcPatternGetBool(FcPattern *p, const char *object, int n, FcBool *b);
FcResult FcPatternGetFTFace(FcPattern *p, const char *object, int n);
FcResult FcPatternGetLangSet(FcPattern *p, const char *object, FT_Face *f);
Description
These are convenience functions that call FcPatternGet and verify that the
returned data is of the expected type. They return FcResultTypeMismatch if this
is not the case. Note that these (like FcPatternGet) do not make a copy of any
data structure referenced by the return value. Use these in preference to
FcPatternGet to provide compile-time typechecking.
Version
Fontconfig version 2.8.0
FcPatternBuild
Name
FcPatternBuild, FcPatternVaBuild, FcPatternVapBuild -- Create patterns from
arguments
Synopsis
#include <fontconfig.h>
FcPattern * FcPatternBuild(FcPattern *pattern, ...);
FcPattern * FcPatternVaBuild(FcPattern *pattern, va_list va);
void FcPatternVapBuild(FcPattern *result, FcPattern *pattern, va_list va);
Description
Builds a pattern using a list of objects, types and values. Each value to be
entered in the pattern is specified with three arguments:
1. Object name, a string describing the property to be added.
2. Object type, one of the FcType enumerated values
3. Value, not an FcValue, but the raw type as passed to any of the
FcPatternAdd<type> functions. Must match the type of the second argument.
The argument list is terminated by a null object name, no object type nor value
need be passed for this. The values are added to `pattern', if `pattern' is
null, a new pattern is created. In either case, the pattern is returned.
Example
pattern = FcPatternBuild (0, FC_FAMILY, FcTypeString, "Times", (char *) 0);
FcPatternVaBuild is used when the arguments are already in the form of a
varargs value. FcPatternVapBuild is a macro version of FcPatternVaBuild which
returns its result directly in the result variable.
Version
Fontconfig version 2.8.0
FcPatternDel
Name
FcPatternDel -- Delete a property from a pattern
Synopsis
#include <fontconfig.h>
FcBool FcPatternDel(FcPattern *p, const char *object);
Description
Deletes all values associated with the property `object', returning whether the
property existed or not.
Version
Fontconfig version 2.8.0
FcPatternRemove
Name
FcPatternRemove -- Remove one object of the specified type from the pattern
Synopsis
#include <fontconfig.h>
FcBool FcPatternRemove(FcPattern *p, const char *object, int id);
Description
Removes the value associated with the property `object' at position `id',
returning whether the property existed and had a value at that position or not.
Version
Fontconfig version 2.8.0
FcPatternPrint
Name
FcPatternPrint -- Print a pattern for debugging
Synopsis
#include <fontconfig.h>
void FcPatternPrint(const FcPattern *p);
Description
Prints an easily readable version of the pattern to stdout. There is no
provision for reparsing data in this format, it's just for diagnostics and
debugging.
Version
Fontconfig version 2.8.0
FcDefaultSubstitute
Name
FcDefaultSubstitute -- Perform default substitutions in a pattern
Synopsis
#include <fontconfig.h>
void FcDefaultSubstitute(FcPattern *pattern);
Description
Supplies default values for underspecified font patterns:
• Patterns without a specified style or weight are set to Medium
• Patterns without a specified style or slant are set to Roman
• Patterns without a specified pixel size are given one computed from any
specified point size (default 12), dpi (default 75) and scale (default 1).
Version
Fontconfig version 2.8.0
FcNameParse
Name
FcNameParse -- Parse a pattern string
Synopsis
#include <fontconfig.h>
FcPattern * FcNameParse(const FcChar8 *name);
Description
Converts name from the standard text format described above into a pattern.
Version
Fontconfig version 2.8.0
FcNameUnparse
Name
FcNameUnparse -- Convert a pattern back into a string that can be parsed
Synopsis
#include <fontconfig.h>
FcChar8 * FcNameUnparse(FcPattern *pat);
Description
Converts the given pattern into the standard text format described above. The
return value is not static, but instead refers to newly allocated memory which
should be freed by the caller using free().
Version
Fontconfig version 2.8.0
FcPatternFormat
Name
FcPatternFormat -- Format a pattern into a string according to a format
specifier
Synopsis
#include <fontconfig.h>
FcChar8 * FcPatternFormat(FcPattern *pat, const FcChar8 *format);
Description
Converts given pattern pat into text described by the format specifier format.
The return value refers to newly allocated memory which should be freed by the
caller using free(), or NULL if format is invalid.
The format is loosely modelled after printf-style format string. The format
string is composed of zero or more directives: ordinary characters (not "%"),
which are copied unchanged to the output stream; and tags which are interpreted
to construct text from the pattern in a variety of ways (explained below).
Special characters can be escaped using backslash. C-string style special
characters like \n and \r are also supported (this is useful when the format
string is not a C string literal). It is advisable to always escape curly
braces that are meant to be copied to the output as ordinary characters.
Each tags is introduced by the character "%", followed by an optional minimum
field width, followed by tag contents in curly braces ({}). If the minimum
field width value is provided the tag will be expanded and the result padded to
achieve the minimum width. If the minimum field width is positive, the padding
will right-align the text. Negative field width will left-align. The rest of
this section describes various supported tag contents and their expansion.
A simple tag is one where the content is an identifier. When simple tags are
expanded, the named identifier will be looked up in pattern and the resulting
list of values returned, joined together using comma. For example, to print the
family name and style the pattern, use the format "%{family} %{style}\n". To
extend the family column to forty characters use "%-40{family}%{style}\n".
Simple tags expand to list of all values for an element. To only choose one of
the values, one can index using the syntax "%{elt[idx]}". For example, to get
the first family name only, use "%{family[0]}".
If a simple tag ends with "=" and the element is found in the pattern, the
name of the element followed by "=" will be output before the list of values.
For example, "%{weight=}" may expand to the string "weight=80". Or to the empty
string if pattern does not have weight set.
If a simple tag starts with ":" and the element is found in the pattern, ":"
will be printed first. For example, combining this with the =, the format "%
{:weight=}" may expand to ":weight=80" or to the empty string if pattern does
not have weight set.
If a simple tag contains the string ":-", the rest of the the tag contents
will be used as a default string. The default string is output if the element
is not found in the pattern. For example, the format "%{:weight=:-123}" may
expand to ":weight=80" or to the string ":weight=123" if pattern does not have
weight set.
A count tag is one that starts with the character "#" followed by an element
name, and expands to the number of values for the element in the pattern. For
example, "%{#family}" expands to the number of family names pattern has set,
which may be zero.
A sub-expression tag is one that expands a sub-expression. The tag contents
are the sub-expression to expand placed inside another set of curly braces.
Sub-expression tags are useful for aligning an entire sub-expression, or to
apply converters (explained later) on an entire sub-expression. For example,
the format "%40{{%{family} %{style}}}" expands the sub-expression to construct
the family name followed by the style, then takes the entire string and pads it
on the left to be at least forty characters.
A filter-out tag is one starting with the character "-" followed by a
comma-separated list of element names, followed by a sub-expression enclosed in
curly braces. The sub-expression will be expanded but with a pattern that has
the listed elements removed from it. For example, the format "%{-size,pixelsize
{sub-expr}}" will expand "sub-expr" with pattern sans the size and pixelsize
elements.
A filter-in tag is one starting with the character "+" followed by a
comma-separated list of element names, followed by a sub-expression enclosed in
curly braces. The sub-expression will be expanded but with a pattern that only
has the listed elements from the surrounding pattern. For example, the format
"%{+family,familylang{sub-expr}}" will expand "sub-expr" with a sub-pattern
consisting only the family and family lang elements of pattern.
A conditional tag is one starting with the character "?" followed by a
comma-separated list of element conditions, followed by two sub-expression
enclosed in curly braces. An element condition can be an element name, in which
case it tests whether the element is defined in pattern, or the character "!"
followed by an element name, in which case the test is negated. The conditional
passes if all the element conditions pass. The tag expands the first
sub-expression if the conditional passes, and expands the second sub-expression
otherwise. For example, the format "%{?size,dpi,!pixelsize{pass}{fail}}" will
expand to "pass" if pattern has size and dpi elements but no pixelsize element,
and to "fail" otherwise.
An enumerate tag is one starting with the string "[]" followed by a
comma-separated list of element names, followed by a sub-expression enclosed in
curly braces. The list of values for the named elements are walked in parallel
and the sub-expression expanded each time with a pattern just having a single
value for those elements, starting from the first value and continuing as long
as any of those elements has a value. For example, the format "%{[]
family,familylang{%{family} (%{familylang})\n}}" will expand the pattern "%
{family} (%{familylang})\n" with a pattern having only the first value of the
family and familylang elemtns, then expands it with the second values, then the
third, etc.
As a special case, if an enumerate tag has only one element, and that element
has only one value in the pattern, and that value is of type FcLangSet, the
individual languages in the language set are enumerated.
A builtin tag is one starting with the character "=" followed by a builtin
name. The following builtins are defined:
unparse
Expands to the result of calling FcNameUnparse() on the pattern.
fcmatch
Expands to the output of the default output format of the fc-match command
on the pattern, without the final newline.
fclist
Expands to the output of the default output format of the fc-list command
on the pattern, without the final newline.
pkgkit
Expands to the list of PackageKit font() tags for the pattern. Currently
this includes tags for each family name, and each language from the
pattern, enumerated and sanitized into a set of tags terminated by newline.
Package management systems can use these tags to tag their packages
accordingly.
For example, the format "%{+family,style{%{=unparse}}}\n" will expand to an
unparsed name containing only the family and style element values from pattern.
The contents of any tag can be followed by a set of zero or more converters. A
converter is specified by the character "|" followed by the converter name and
arguments. The following converters are defined:
basename
Replaces text with the results of calling FcStrBasename() on it.
dirname
Replaces text with the results of calling FcStrDirname() on it.
downcase
Replaces text with the results of calling FcStrDowncase() on it.
shescape
Escapes text for one level of shell expansion. (Escapes single-quotes, also
encloses text in single-quotes.)
cescape
Escapes text such that it can be used as part of a C string literal.
(Escapes backslash and double-quotes.)
xmlescape
Escapes text such that it can be used in XML and HTML. (Escapes less-than,
greater-than, and ampersand.)
delete(chars)
Deletes all occurrences of each of the characters in chars from the text.
FIXME: This converter is not UTF-8 aware yet.
escape(chars)
Escapes all occurrences of each of the characters in chars by prepending it
by the first character in chars. FIXME: This converter is not UTF-8 aware
yet.
translate(from,to)
Translates all occurrences of each of the characters in from by replacing
them with their corresponding character in to. If to has fewer characters
than from, it will be extended by repeating its last character. FIXME: This
converter is not UTF-8 aware yet.
For example, the format "%{family|downcase|delete( )}\n" will expand to the
values of the family element in pattern, lower-cased and with spaces removed.
Version
Fontconfig version 2.8.0
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FcFontSet
Table of Contents
FcFontSetCreate -- Create a font set
FcFontSetDestroy -- Destroy a font set
FcFontSetAdd -- Add to a font set
FcFontSetList -- List fonts from a set of font sets
FcFontSetMatch -- Return the best font from a set of font sets
FcFontSetPrint -- Print a set of patterns to stdout
FcFontSetSort -- Add to a font set
FcFontSetSortDestroy -- DEPRECATED destroy a font set
An FcFontSet simply holds a list of patterns; these are used to return the
results of listing available fonts.
FcFontSetCreate
Name
FcFontSetCreate -- Create a font set
Synopsis
#include <fontconfig.h>
FcFontSet * FcFontSetCreate(void);
Description
Creates an empty font set.
Version
Fontconfig version 2.8.0
FcFontSetDestroy
Name
FcFontSetDestroy -- Destroy a font set
Synopsis
#include <fontconfig.h>
void FcFontSetDestroy(FcFontSet *s);
Description
Destroys a font set. Note that this destroys any referenced patterns as well.
Version
Fontconfig version 2.8.0
FcFontSetAdd
Name
FcFontSetAdd -- Add to a font set
Synopsis
#include <fontconfig.h>
FcBool FcFontSetAdd(FcFontSet *s, FcPattern *font);
Description
Adds a pattern to a font set. Note that the pattern is not copied before being
inserted into the set. Returns FcFalse if the pattern cannot be inserted into
the set (due to allocation failure). Otherwise returns FcTrue.
Version
Fontconfig version 2.8.0
FcFontSetList
Name
FcFontSetList -- List fonts from a set of font sets
Synopsis
#include <fontconfig.h>
FcFontSet * FcFontSetList(FcConfig *config, FcFontSet **sets, intnsets,
FcPattern *pattern, FcObjectSet *object_set);
Description
Selects fonts matching pattern from sets, creates patterns from those fonts
containing only the objects in object_set and returns the set of unique such
patterns. If config is NULL, the default configuration is checked to be up to
date, and used.
Version
Fontconfig version 2.8.0
FcFontSetMatch
Name
FcFontSetMatch -- Return the best font from a set of font sets
Synopsis
#include <fontconfig.h>
FcPattern * FcFontSetMatch(FcConfig *config, FcFontSet **sets, intnsets,
FcPattern *pattern, FcResult *result);
Description
Finds the font in sets most closely matching pattern and returns the result of
FcFontRenderPrepare for that font and the provided pattern. This function
should be called only after FcConfigSubstitute and FcDefaultSubstitute have
been called for pattern; otherwise the results will not be correct. If config
is NULL, the current configuration is used. Returns NULL if an error occurs
during this process.
Version
Fontconfig version 2.8.0
FcFontSetPrint
Name
FcFontSetPrint -- Print a set of patterns to stdout
Synopsis
#include <fontconfig.h>
void FcFontSetPrint(FcFontSet *set);
Description
This function is useful for diagnosing font related issues, printing the
complete contents of every pattern in set. The format of the output is designed
to be of help to users and developers, and may change at any time.
Version
Fontconfig version 2.8.0
FcFontSetSort
Name
FcFontSetSort -- Add to a font set
Synopsis
#include <fontconfig.h>
FcFontSetSort(FcConfig *config, FcFontSet **sets, intnsets, FcPattern *pattern,
FcBool trim, FcCharSet **csp, FcResult *result);
Description
Returns the list of fonts from sets sorted by closeness to pattern. If trim is
FcTrue, elements in the list which don't include Unicode coverage not provided
by earlier elements in the list are elided. The union of Unicode coverage of
all of the fonts is returned in csp, if csp is not NULL. This function should
be called only after FcConfigSubstitute and FcDefaultSubstitute have been
called for p; otherwise the results will not be correct.
The returned FcFontSet references FcPattern structures which may be shared by
the return value from multiple FcFontSort calls, applications cannot modify
these patterns. Instead, they should be passed, along with pattern to
FcFontRenderPrepare which combines them into a complete pattern.
The FcFontSet returned by FcFontSetSort is destroyed by caling
FcFontSetDestroy.
Version
Fontconfig version 2.8.0
FcFontSetSortDestroy
Name
FcFontSetSortDestroy -- DEPRECATED destroy a font set
Synopsis
#include <fontconfig.h>
FcFontSetSortDestroy(FcFontSet *set);
Description
This function is DEPRECATED. FcFontSetSortDestroy destroys set by calling
FcFontSetDestroy. Applications should use FcFontSetDestroy directly instead.
Version
Fontconfig version 2.8.0
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FcObjectSet
Table of Contents
FcObjectSetCreate -- Create an object set
FcObjectSetAdd -- Add to an object set
FcObjectSetDestroy -- Destroy an object set
FcObjectSetBuild -- Build object set from args
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.
FcObjectSetCreate
Name
FcObjectSetCreate -- Create an object set
Synopsis
#include <fontconfig.h>
FcObjectSet * FcObjectSetCreate(void);
Description
Creates an empty set.
Version
Fontconfig version 2.8.0
FcObjectSetAdd
Name
FcObjectSetAdd -- Add to an object set
Synopsis
#include <fontconfig.h>
FcBool FcObjectSetAdd(FcObjectSet *os, const char *object);
Description
Adds a proprety name to the set. Returns FcFalse if the property name cannot be
inserted into the set (due to allocation failure). Otherwise returns FcTrue.
Version
Fontconfig version 2.8.0
FcObjectSetDestroy
Name
FcObjectSetDestroy -- Destroy an object set
Synopsis
#include <fontconfig.h>
void FcObjectSetDestroy(FcObjectSet *os);
Description
Destroys an object set.
Version
Fontconfig version 2.8.0
FcObjectSetBuild
Name
FcObjectSetBuild, FcObjectSetVaBuild, FcObjectSetVapBuild -- Build object set
from args
Synopsis
#include <fontconfig.h>
FcObjectSet * FcObjectSetBuild(const char *first, ...);
FcObjectSet * FcObjectSetVaBuild(const char *first, va_list va);
void FcObjectSetVapBuild(FcObjectSet *result, const char *first, va_list va);
Description
These build an object set from a null-terminated list of property names.
FcObjectSetVapBuild is a macro version of FcObjectSetVaBuild which returns the
result in the result variable directly.
Version
Fontconfig version 2.8.0
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FreeType specific functions
Table of Contents
FcFreeTypeCharIndex -- map Unicode to glyph id
FcFreeTypeCharSet -- compute unicode coverage
FcFreeTypeCharSetAndSpacing -- compute unicode coverage and spacing type
FcFreeTypeQuery -- compute pattern from font file (and index)
FcFreeTypeQueryFace -- compute pattern from FT_Face
While the fontconfig library doesn't insist that FreeType be used as the
rasterization mechanism for fonts, it does provide some convenience functions.
FcFreeTypeCharIndex
Name
FcFreeTypeCharIndex -- map Unicode to glyph id
Synopsis
#include <fontconfig.h>
#include <fcfreetype.h>
FT_UInt FcFreeTypeCharIndex(FT_Face face, FcChar32 ucs4);
Description
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.
Version
Fontconfig version 2.8.0
FcFreeTypeCharSet
Name
FcFreeTypeCharSet -- compute unicode coverage
Synopsis
#include <fontconfig.h>
#include <fcfreetype.h>
FcCharSet * FcFreeTypeCharSet(FT_Face face, FcBlanks *blanks);
Description
Scans a 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.
Version
Fontconfig version 2.8.0
FcFreeTypeCharSetAndSpacing
Name
FcFreeTypeCharSetAndSpacing -- compute unicode coverage and spacing type
Synopsis
#include <fontconfig.h>
#include <fcfreetype.h>
FcCharSet * FcFreeTypeCharSetAndSpacing(FT_Face face, FcBlanks *blanks, int *
spacing);
Description
Scans a 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. spacing receives the computed spacing
type of the font, one of FC_MONO for a font where all glyphs have the same
width, FC_DUAL, where the font has glyphs in precisely two widths, one twice as
wide as the other, or FC_PROPORTIONAL where the font has glyphs of many widths.
Version
Fontconfig version 2.8.0
FcFreeTypeQuery
Name
FcFreeTypeQuery -- compute pattern from font file (and index)
Synopsis
#include <fontconfig.h>
#include <fcfreetype.h>
FcPattern * FcFreeTypeQuery(const FcChar8 *file, int id, FcBlanks *blanks, int
*count);
Description
Constructs a pattern representing the 'id'th font in 'file'. The number of
fonts in 'file' is returned in 'count'.
Version
Fontconfig version 2.8.0
FcFreeTypeQueryFace
Name
FcFreeTypeQueryFace -- compute pattern from FT_Face
Synopsis
#include <fontconfig.h>
#include <fcfreetype.h>
FcPattern * FcFreeTypeQueryFace(const FT_Face face, const FcChar8 *file, int id
, FcBlanks *blanks);
Description
Constructs a pattern representing 'face'. 'file' and 'id' are used solely as
data for pattern elements (FC_FILE, FC_INDEX and sometimes FC_FAMILY).
Version
Fontconfig version 2.8.0
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FcValue
Table of Contents
FcValueDestroy -- Free a value
FcValueSave -- Copy a value
FcValuePrint -- Print a value to stdout
FcValueEqual -- Test two values for equality
FcValue is a structure containing a type tag and a union of all possible
datatypes. The tag is an enum of type FcType and is intended to provide a
measure of run-time typechecking, although that depends on careful programming.
FcValueDestroy
Name
FcValueDestroy -- Free a value
Synopsis
#include <fontconfig.h>
void FcValueDestroy(FcValue v);
Description
Frees any memory referenced by v. Values of type FcTypeString, FcTypeMatrix and
FcTypeCharSet reference memory, the other types do not.
Version
Fontconfig version 2.8.0
FcValueSave
Name
FcValueSave -- Copy a value
Synopsis
#include <fontconfig.h>
FcValue FcValueSave(FcValue v);
Description
Returns a copy of v duplicating any object referenced by it so that v may be
safely destroyed without harming the new value.
Version
Fontconfig version 2.8.0
FcValuePrint
Name
FcValuePrint -- Print a value to stdout
Synopsis
#include <fontconfig.h>
void FcValuePrint(FcValue v);
Description
Prints a human-readable representation of v to stdout. The format should not be
considered part of the library specification as it may change in the future.
Version
Fontconfig version 2.8.0
FcValueEqual
Name
FcValueEqual -- Test two values for equality
Synopsis
#include <fontconfig.h>
FcBool FcValueEqual(FcValue v_a, FcValue v_b);
Description
Compares two values. Integers and Doubles are compared as numbers; otherwise
the two values have to be the same type to be considered equal. Strings are
compared ignoring case.
Version
Fontconfig version 2.8.0
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FcCharSet
Table of Contents
FcCharSetCreate -- Create an empty character set
FcCharSetDestroy -- Destroy a character set
FcCharSetAddChar -- Add a character to a charset
FcCharSetCopy -- Copy a charset
FcCharSetEqual -- Compare two charsets
FcCharSetIntersect -- Intersect charsets
FcCharSetUnion -- Add charsets
FcCharSetSubtract -- Subtract charsets
FcCharSetMerge -- Merge charsets
FcCharSetHasChar -- Check a charset for a char
FcCharSetCount -- Count entries in a charset
FcCharSetIntersectCount -- Intersect and count charsets
FcCharSetSubtractCount -- Subtract and count charsets
FcCharSetIsSubset -- Test for charset inclusion
FcCharSetFirstPage -- Start enumerating charset contents
FcCharSetNextPage -- Continue enumerating charset contents
FcCharSetCoverage -- DEPRECATED return coverage for a Unicode page
FcCharSetNew -- DEPRECATED alias for FcCharSetCreate
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.
FcCharSetCreate
Name
FcCharSetCreate -- Create an empty character set
Synopsis
#include <fontconfig.h>
FcCharSet * FcCharSetCreate(void);
Description
FcCharSetCreate allocates and initializes a new empty character set object.
Version
Fontconfig version 2.8.0
FcCharSetDestroy
Name
FcCharSetDestroy -- Destroy a character set
Synopsis
#include <fontconfig.h>
void FcCharSetDestroy(FcCharSet *fcs);
Description
FcCharSetDestroy decrements the reference count fcs. If the reference count
becomes zero, all memory referenced is freed.
Version
Fontconfig version 2.8.0
FcCharSetAddChar
Name
FcCharSetAddChar -- Add a character to a charset
Synopsis
#include <fontconfig.h>
FcBool FcCharSetAddChar(FcCharSet *fcs, FcChar32 ucs4);
Description
FcCharSetAddChar adds a single unicode char to the set, returning FcFalse on
failure, either as a result of a constant set or from running out of memory.
Version
Fontconfig version 2.8.0
FcCharSetCopy
Name
FcCharSetCopy -- Copy a charset
Synopsis
#include <fontconfig.h>
FcCharSet * FcCharSetCopy(FcCharSet *src);
Description
Makes a copy of src; note that this may not actually do anything more than
increment the reference count on src.
Version
Fontconfig version 2.8.0
FcCharSetEqual
Name
FcCharSetEqual -- Compare two charsets
Synopsis
#include <fontconfig.h>
FcBool FcCharSetEqual(const FcCharSet *a, const FcCharSet *b);
Description
Returns whether a and b contain the same set of unicode chars.
Version
Fontconfig version 2.8.0
FcCharSetIntersect
Name
FcCharSetIntersect -- Intersect charsets
Synopsis
#include <fontconfig.h>
FcCharSet * FcCharSetIntersect(const FcCharSet *a, const FcCharSet *b);
Description
Returns a set including only those chars found in both a and b.
Version
Fontconfig version 2.8.0
FcCharSetUnion
Name
FcCharSetUnion -- Add charsets
Synopsis
#include <fontconfig.h>
FcCharSet * FcCharSetUnion(const FcCharSet *a, const FcCharSet *b);
Description
Returns a set including only those chars found in either a or b.
Version
Fontconfig version 2.8.0
FcCharSetSubtract
Name
FcCharSetSubtract -- Subtract charsets
Synopsis
#include <fontconfig.h>
FcCharSet * FcCharSetSubtract(const FcCharSet *a, const FcCharSet *b);
Description
Returns a set including only those chars found in a but not b.
Version
Fontconfig version 2.8.0
FcCharSetMerge
Name
FcCharSetMerge -- Merge charsets
Synopsis
#include <fontconfig.h>
FcBool FcCharSetMerge(FcCharSet *a, const FcCharSet *b, FcBool *changed);
Description
Adds all chars in b to a. In other words, this is an in-place version of
FcCharSetUnion. If changed is not NULL, then it returns whether any new chars
from b were added to a. Returns FcFalse on failure, either when a is a constant
set or from running out of memory.
Version
Fontconfig version 2.8.0
FcCharSetHasChar
Name
FcCharSetHasChar -- Check a charset for a char
Synopsis
#include <fontconfig.h>
FcBool FcCharSetHasChar(const FcCharSet *fcs, FcChar32 ucs4);
Description
Returns whether fcs contains the char ucs4.
Version
Fontconfig version 2.8.0
FcCharSetCount
Name
FcCharSetCount -- Count entries in a charset
Synopsis
#include <fontconfig.h>
FcChar32 FcCharSetCount(const FcCharSet *a);
Description
Returns the total number of unicode chars in a.
Version
Fontconfig version 2.8.0
FcCharSetIntersectCount
Name
FcCharSetIntersectCount -- Intersect and count charsets
Synopsis
#include <fontconfig.h>
FcChar32 FcCharSetIntersectCount(const FcCharSet *a, const FcCharSet *b);
Description
Returns the number of chars that are in both a and b.
Version
Fontconfig version 2.8.0
FcCharSetSubtractCount
Name
FcCharSetSubtractCount -- Subtract and count charsets
Synopsis
#include <fontconfig.h>
FcChar32 FcCharSetSubtractCount(const FcCharSet *a, const FcCharSet *b);
Description
Returns the number of chars that are in a but not in b.
Version
Fontconfig version 2.8.0
FcCharSetIsSubset
Name
FcCharSetIsSubset -- Test for charset inclusion
Synopsis
#include <fontconfig.h>
FcBool FcCharSetIsSubset(const FcCharSet *a, const FcCharSet *b);
Description
Returns whether a is a subset of b.
Version
Fontconfig version 2.8.0
FcCharSetFirstPage
Name
FcCharSetFirstPage -- Start enumerating charset contents
Synopsis
#include <fontconfig.h>
FcChar32 FcCharSetFirstPage(const FcCharSet *a, FcChar32[FC_CHARSET_MAP_SIZE]
map, FcChar32 *next);
Description
Builds an array of bits marking the first page of Unicode coverage of a.
Returns the base of the array. next contains the next page in the font.
Version
Fontconfig version 2.8.0
FcCharSetNextPage
Name
FcCharSetNextPage -- Continue enumerating charset contents
Synopsis
#include <fontconfig.h>
FcChar32 FcCharSetNextPage(const FcCharSet *a, FcChar32[FC_CHARSET_MAP_SIZE]
map, FcChar32 *next);
Description
Builds an array of bits marking the Unicode coverage of a for page *next.
Returns the base of the array. next contains the next page in the font.
Version
Fontconfig version 2.8.0
FcCharSetCoverage
Name
FcCharSetCoverage -- DEPRECATED return coverage for a Unicode page
Synopsis
#include <fontconfig.h>
FcChar32 FcCharSetCoverage(const FcCharSet *a, FcChar32page, FcChar32[8]result
);
Description
DEPRECATED This function returns a bitmask in result which indicates which code
points in page are included in a. FcCharSetCoverage returns the next page in
the charset which has any coverage.
Version
Fontconfig version 2.8.0
FcCharSetNew
Name
FcCharSetNew -- DEPRECATED alias for FcCharSetCreate
Synopsis
#include <fontconfig.h>
FcCharSet * FcCharSetNew(void);
Description
FcCharSetNew is a DEPRECATED alias for FcCharSetCreate.
Version
Fontconfig version 2.8.0
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FcLangSet
Table of Contents
FcLangSetCreate -- create a langset object
FcLangSetDestroy -- destroy a langset object
FcLangSetCopy -- copy a langset object
FcLangSetAdd -- add a language to a langset
FcLangSetCompare -- compare language sets
FcLangSetContains -- check langset subset relation
FcLangSetEqual -- test for matching langsets
FcLangSetHash -- return a hash value for a langset
FcLangSetHasLang -- test langset for language support
FcLangSetGetLangs -- get the list of languages in the langset
FcGetLangs -- Get list of languages
FcLangGetCharSet -- Get character map for a language
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.
FcLangSetCreate
Name
FcLangSetCreate -- create a langset object
Synopsis
#include <fontconfig.h>
FcLangSet * FcLangSetCreate(void);
Description
FcLangSetCreate creates a new FcLangSet object.
Version
Fontconfig version 2.8.0
FcLangSetDestroy
Name
FcLangSetDestroy -- destroy a langset object
Synopsis
#include <fontconfig.h>
void FcLangSetDestroy(FcLangSet *ls);
Description
FcLangSetDestroy destroys a FcLangSet object, freeing all memory associated
with it.
Version
Fontconfig version 2.8.0
FcLangSetCopy
Name
FcLangSetCopy -- copy a langset object
Synopsis
#include <fontconfig.h>
FcLangSet * FcLangSetCopy(const FcLangSet *ls);
Description
FcLangSetCopy creates a new FcLangSet object and populates it with the contents
of ls.
Version
Fontconfig version 2.8.0
FcLangSetAdd
Name
FcLangSetAdd -- add a language to a langset
Synopsis
#include <fontconfig.h>
FcBool FcLangSetAdd(FcLangSet *ls, const FcChar8 *lang);
Description
lang is added to ls. lang should be of the form Ll-Tt where Ll is a two or
three letter language from ISO 639 and Tt is a territory from ISO 3166.
Version
Fontconfig version 2.8.0
FcLangSetCompare
Name
FcLangSetCompare -- compare language sets
Synopsis
#include <fontconfig.h>
FcLangResult FcLangSetCompare(const FcLangSet *ls_a, const FcLangSet *ls_b);
Description
FcLangSetCompare compares language coverage for ls_a and ls_b. If they share
any language and territory pair, this function returns FcLangEqual. If they
share a language but differ in which territory that language is for, this
function returns FcLangDiffentTerritory. If they share no languages in common,
this function returns FcLangDifferentLang.
Version
Fontconfig version 2.8.0
FcLangSetContains
Name
FcLangSetContains -- check langset subset relation
Synopsis
#include <fontconfig.h>
FcBool FcLangSetContains(const FcLangSet *ls_a, const FcLangSet *ls_b);
Description
FcLangSetContains returns FcTrue if ls_a contains every language in ls_b. ls_a
will 'contain' a language from ls_b if ls_a has exactly the language, or either
the language or ls_a has no territory.
Version
Fontconfig version 2.8.0
FcLangSetEqual
Name
FcLangSetEqual -- test for matching langsets
Synopsis
#include <fontconfig.h>
FcBool FcLangSetEqual(const FcLangSet *ls_a, const FcLangSet *ls_b);
Description
Returns FcTrue if and only if ls_a supports precisely the same language and
territory combinations as ls_b.
Version
Fontconfig version 2.8.0
FcLangSetHash
Name
FcLangSetHash -- return a hash value for a langset
Synopsis
#include <fontconfig.h>
FcChar32 FcLangSetHash(const FcLangSet *ls);
Description
This function returns a value which depends solely on the languages supported
by ls. Any language which equals ls will have the same result from
FcLangSetHash. However, two langsets with the same hash value may not be equal.
Version
Fontconfig version 2.8.0
FcLangSetHasLang
Name
FcLangSetHasLang -- test langset for language support
Synopsis
#include <fontconfig.h>
FcLangResult FcLangSetHasLang(const FcLangSet *ls, const FcChar8 *lang);
Description
FcLangSetHasLang checks whether ls supports lang. If ls has a matching language
and territory pair, this function returns FcLangEqual. If ls has a matching
language but differs in which territory that language is for, this function
returns FcLangDiffentTerritory. If ls has no matching language, this function
returns FcLangDifferentLang.
Version
Fontconfig version 2.8.0
FcLangSetGetLangs
Name
FcLangSetGetLangs -- get the list of languages in the langset
Synopsis
#include <fontconfig.h>
FcStrSet * FcLangSetGetLangs(const FcLangSet *ls);
Description
Returns a string set of all languages in langset.
Version
Fontconfig version 2.8.0
FcGetLangs
Name
FcGetLangs -- Get list of languages
Synopsis
#include <fontconfig.h>
FcStrSet * FcGetLangs(void);
Description
Returns a string set of all known languages.
Version
Fontconfig version 2.8.0
FcLangGetCharSet
Name
FcLangGetCharSet -- Get character map for a language
Synopsis
#include <fontconfig.h>
const FcCharSet * FcLangGetCharSet(const FcChar8 *lang);
Description
Returns the FcCharMap for a language.
Version
Fontconfig version 2.8.0
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FcMatrix
Table of Contents
FcMatrixInit -- initialize an FcMatrix structure
FcMatrixCopy -- Copy a matrix
FcMatrixEqual -- Compare two matrices
FcMatrixMultiply -- Multiply matrices
FcMatrixRotate -- Rotate a matrix
FcMatrixScale -- Scale a matrix
FcMatrixShear -- Shear a matrix
FcMatrix structures hold an affine transformation in matrix form.
FcMatrixInit
Name
FcMatrixInit -- initialize an FcMatrix structure
Synopsis
#include <fontconfig.h>
void FcMatrixInit(FcMatrix *matrix);
Description
FcMatrixInit initializes matrix to the identity matrix.
Version
Fontconfig version 2.8.0
FcMatrixCopy
Name
FcMatrixCopy -- Copy a matrix
Synopsis
#include <fontconfig.h>
void FcMatrixCopy(const FcMatrix *matrix);
Description
FcMatrixCopy allocates a new FcMatrix and copies mat into it.
Version
Fontconfig version 2.8.0
FcMatrixEqual
Name
FcMatrixEqual -- Compare two matrices
Synopsis
#include <fontconfig.h>
void FcMatrixEqual(const FcMatrix *matrix1, const FcMatrix *matrix2);
Description
FcMatrixEqual compares matrix1 and matrix2 returning FcTrue when they are equal
and FcFalse when they are not.
Version
Fontconfig version 2.8.0
FcMatrixMultiply
Name
FcMatrixMultiply -- Multiply matrices
Synopsis
#include <fontconfig.h>
void FcMatrixMultiply(FcMatrix *result, const FcMatrix *matrix1, const FcMatrix
*matrix2);
Description
FcMatrixMultiply multiplies matrix1 and matrix2 storing the result in result.
Version
Fontconfig version 2.8.0
FcMatrixRotate
Name
FcMatrixRotate -- Rotate a matrix
Synopsis
#include <fontconfig.h>
void FcMatrixRotate(FcMatrix *matrix, double cos, double sin);
Description
FcMatrixRotate rotates matrix by the angle who's sine is sin and cosine is cos.
This is done by multiplying by the matrix:
cos -sin
sin cos
Version
Fontconfig version 2.8.0
FcMatrixScale
Name
FcMatrixScale -- Scale a matrix
Synopsis
#include <fontconfig.h>
void FcMatrixScale(FcMatrix *matrix, double sx, double dy);
Description
FcMatrixScale multiplies matrix x values by sx and y values by sy. This is done
by multiplying by the matrix:
sx 0
0 sy
Version
Fontconfig version 2.8.0
FcMatrixShear
Name
FcMatrixShear -- Shear a matrix
Synopsis
#include <fontconfig.h>
void FcMatrixShear(FcMatrix *matrix, double sh, double sv);
Description
FcMatrixShare shears matrix horizontally by sh and vertically by sv. This is
done by multiplying by the matrix:
1 sh
sv 1
Version
Fontconfig version 2.8.0
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FcConfig
Table of Contents
FcConfigCreate -- Create a configuration
FcConfigReference -- Increment config reference count
FcConfigDestroy -- Destroy a configuration
FcConfigSetCurrent -- Set configuration as default
FcConfigGetCurrent -- Return current configuration
FcConfigUptoDate -- Check timestamps on config files
FcConfigHome -- return the current home directory.
FcConfigEnableHome -- controls use of the home directory.
FcConfigBuildFonts -- Build font database
FcConfigGetConfigDirs -- Get config directories
FcConfigGetFontDirs -- Get font directories
FcConfigGetConfigFiles -- Get config files
FcConfigGetCache -- DEPRECATED used to return per-user cache filename
FcConfigGetCacheDirs -- return the list of directories searched for cache files
FcConfigGetFonts -- Get config font set
FcConfigGetBlanks -- Get config blanks
FcConfigGetRescanInterval -- Get config rescan interval
FcConfigSetRescanInterval -- Set config rescan interval
FcConfigAppFontAddFile -- Add font file to font database
FcConfigAppFontAddDir -- Add fonts from directory to font database
FcConfigAppFontClear -- Remove all app fonts from font database
FcConfigSubstituteWithPat -- Execute substitutions
FcConfigSubstitute -- Execute substitutions
FcFontMatch -- Return best font
FcFontSort -- Return list of matching fonts
FcFontRenderPrepare -- Prepare pattern for loading font file
FcFontList -- List fonts
FcConfigFilename -- Find a config file
FcConfigParseAndLoad -- load a configuration file
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.
FcConfigCreate
Name
FcConfigCreate -- Create a configuration
Synopsis
#include <fontconfig.h>
FcConfig * FcConfigCreate(void);
Description
Creates an empty configuration.
Version
Fontconfig version 2.8.0
FcConfigReference
Name
FcConfigReference -- Increment config reference count
Synopsis
#include <fontconfig.h>
FcConfig * FcConfigReference(FcConfig *config);
Description
Add another reference to config. Configs are freed only when the reference
count reaches zero. If config is NULL, the current configuration is used. In
that case this function will be similar to FcConfigGetCurrent() except that it
increments the reference count before returning and the user is responsible for
destroying the configuration when not needed anymore.
Version
Fontconfig version 2.8.0
FcConfigDestroy
Name
FcConfigDestroy -- Destroy a configuration
Synopsis
#include <fontconfig.h>
void FcConfigDestroy(FcConfig *config);
Description
Decrements the config reference count. If all references are gone, destroys the
configuration and any data associated with it. Note that calling this function
with the return from FcConfigGetCurrent will cause a new configuration to be
created for use as current configuration.
Version
Fontconfig version 2.8.0
FcConfigSetCurrent
Name
FcConfigSetCurrent -- Set configuration as default
Synopsis
#include <fontconfig.h>
FcBool FcConfigSetCurrent(FcConfig *config);
Description
Sets the current default configuration to config. Implicitly calls
FcConfigBuildFonts if necessary, returning FcFalse if that call fails.
Version
Fontconfig version 2.8.0
FcConfigGetCurrent
Name
FcConfigGetCurrent -- Return current configuration
Synopsis
#include <fontconfig.h>
FcConfig * FcConfigGetCurrent(void);
Description
Returns the current default configuration.
Version
Fontconfig version 2.8.0
FcConfigUptoDate
Name
FcConfigUptoDate -- Check timestamps on config files
Synopsis
#include <fontconfig.h>
FcBool FcConfigUptoDate(FcConfig *config);
Description
Checks all of the files related to config and returns whether any of them has
been modified since the configuration was created. If config is NULL, the
current configuration is used.
Version
Fontconfig version 2.8.0
FcConfigHome
Name
FcConfigHome -- return the current home directory.
Synopsis
#include <fontconfig.h>
FcChar8 * FcConfigHome(void);
Description
Return the current user's home directory, if it is available, and if using it
is enabled, and NULL otherwise. See also FcConfigEnableHome).
Version
Fontconfig version 2.8.0
FcConfigEnableHome
Name
FcConfigEnableHome -- controls use of the home directory.
Synopsis
#include <fontconfig.h>
FcBol FcConfigEnableHome(FcBool enable);
Description
If enable is FcTrue, then Fontconfig will use various files which are specified
relative to the user's home directory (using the ~ notation in the
configuration). When enable is FcFalse, then all use of the home directory in
these contexts will be disabled. The previous setting of the value is returned.
Version
Fontconfig version 2.8.0
FcConfigBuildFonts
Name
FcConfigBuildFonts -- Build font database
Synopsis
#include <fontconfig.h>
FcBool FcConfigBuildFonts(FcConfig *config);
Description
Builds the set of available fonts for the given configuration. Note that any
changes to the configuration after this call have indeterminate effects.
Returns FcFalse if this operation runs out of memory. If config is NULL, the
current configuration is used.
Version
Fontconfig version 2.8.0
FcConfigGetConfigDirs
Name
FcConfigGetConfigDirs -- Get config directories
Synopsis
#include <fontconfig.h>
FcStrList * FcConfigGetConfigDirs(FcConfig *config);
Description
Returns the list of font directories specified in the configuration files for
config. Does not include any subdirectories. If config is NULL, the current
configuration is used.
Version
Fontconfig version 2.8.0
FcConfigGetFontDirs
Name
FcConfigGetFontDirs -- Get font directories
Synopsis
#include <fontconfig.h>
FcStrList * FcConfigGetFontDirs(FcConfig *config);
Description
Returns the list of font directories in config. This includes the configured
font directories along with any directories below those in the filesystem. If
config is NULL, the current configuration is used.
Version
Fontconfig version 2.8.0
FcConfigGetConfigFiles
Name
FcConfigGetConfigFiles -- Get config files
Synopsis
#include <fontconfig.h>
FcStrList * FcConfigGetConfigFiles(FcConfig *config);
Description
Returns the list of known configuration files used to generate config. If
config is NULL, the current configuration is used.
Version
Fontconfig version 2.8.0
FcConfigGetCache
Name
FcConfigGetCache -- DEPRECATED used to return per-user cache filename
Synopsis
#include <fontconfig.h>
FcChar8 * FcConfigGetCache(FcConfig *config);
Description
With fontconfig no longer using per-user cache files, this function now simply
returns NULL to indicate that no per-user file exists.
Version
Fontconfig version 2.8.0
FcConfigGetCacheDirs
Name
FcConfigGetCacheDirs -- return the list of directories searched for cache files
Synopsis
#include <fontconfig.h>
FcStrList * FcConfigGetCacheDirs(FcConfig *config);
Description
FcConfigGetCacheDirs returns a string list containing all of the directories
that fontconfig will search when attempting to load a cache file for a font
directory. If config is NULL, the current configuration is used.
Version
Fontconfig version 2.8.0
FcConfigGetFonts
Name
FcConfigGetFonts -- Get config font set
Synopsis
#include <fontconfig.h>
FcFontSet * FcConfigGetFonts(FcConfig *config, FcSetName set);
Description
Returns one of the two sets of fonts from the configuration as specified by set
. This font set is owned by the library and must not be modified or freed. If
config is NULL, the current configuration is used.
Version
Fontconfig version 2.8.0
FcConfigGetBlanks
Name
FcConfigGetBlanks -- Get config blanks
Synopsis
#include <fontconfig.h>
FcBlanks * FcConfigGetBlanks(FcConfig *config);
Description
Returns the FcBlanks object associated with the given configuration, if no
blanks were present in the configuration, this function will return 0. The
returned FcBlanks object if not NULL, is valid as long as the owning FcConfig
is alive. If config is NULL, the current configuration is used.
Version
Fontconfig version 2.8.0
FcConfigGetRescanInterval
Name
FcConfigGetRescanInterval -- Get config rescan interval
Synopsis
#include <fontconfig.h>
int FcConfigGetRescanInterval(FcConfig *config);
Description
Returns the interval between automatic checks of the configuration (in seconds)
specified in config. The configuration is checked during a call to FcFontList
when this interval has passed since the last check. An interval setting of zero
disables automatic checks. If config is NULL, the current configuration is
used.
Version
Fontconfig version 2.8.0
FcConfigSetRescanInterval
Name
FcConfigSetRescanInterval -- Set config rescan interval
Synopsis
#include <fontconfig.h>
FcBool FcConfigSetRescanInterval(FcConfig *config, int rescanInterval);
Description
Sets the rescan interval. Returns FcFalse if the interval cannot be set (due to
allocation failure). Otherwise returns FcTrue. An interval setting of zero
disables automatic checks. If config is NULL, the current configuration is
used.
Version
Fontconfig version 2.8.0
FcConfigAppFontAddFile
Name
FcConfigAppFontAddFile -- Add font file to font database
Synopsis
#include <fontconfig.h>
FcBool FcConfigAppFontAddFile(FcConfig *config, const FcChar8 *file);
Description
Adds an application-specific font to the configuration. Returns FcFalse if the
fonts cannot be added (due to allocation failure). Otherwise returns FcTrue. If
config is NULL, the current configuration is used.
Version
Fontconfig version 2.8.0
FcConfigAppFontAddDir
Name
FcConfigAppFontAddDir -- Add fonts from directory to font database
Synopsis
#include <fontconfig.h>
FcBool FcConfigAppFontAddDir(FcConfig *config, const FcChar8 *dir);
Description
Scans the specified directory for fonts, adding each one found to the
application-specific set of fonts. Returns FcFalse if the fonts cannot be added
(due to allocation failure). Otherwise returns FcTrue. If config is NULL, the
current configuration is used.
Version
Fontconfig version 2.8.0
FcConfigAppFontClear
Name
FcConfigAppFontClear -- Remove all app fonts from font database
Synopsis
#include <fontconfig.h>
void FcConfigAppFontClear(FcConfig *config);
Description
Clears the set of application-specific fonts. If config is NULL, the current
configuration is used.
Version
Fontconfig version 2.8.0
FcConfigSubstituteWithPat
Name
FcConfigSubstituteWithPat -- Execute substitutions
Synopsis
#include <fontconfig.h>
FcBool FcConfigSubstituteWithPat(FcConfig *config, FcPattern *p, FcPattern *
p_pat, FcMatchKind kind);
Description
Performs the sequence of pattern modification operations, if kind is
FcMatchPattern, then those tagged as pattern operations are applied, else if
kind is FcMatchFont, those tagged as font operations are applied and p_pat is
used for <test> elements with target=pattern. Returns FcFalse if the
substitution cannot be performed (due to allocation failure). Otherwise returns
FcTrue. If config is NULL, the current configuration is used.
Version
Fontconfig version 2.8.0
FcConfigSubstitute
Name
FcConfigSubstitute -- Execute substitutions
Synopsis
#include <fontconfig.h>
FcBool FcConfigSubstitute(FcConfig *config, FcPattern *p, FcMatchKind kind);
Description
Calls FcConfigSubstituteWithPat setting p_pat to NULL. Returns FcFalse if the
substitution cannot be performed (due to allocation failure). Otherwise returns
FcTrue. If config is NULL, the current configuration is used.
Version
Fontconfig version 2.8.0
FcFontMatch
Name
FcFontMatch -- Return best font
Synopsis
#include <fontconfig.h>
FcPattern * FcFontMatch(FcConfig *config, FcPattern *p, FcResult *result);
Description
Finds the font in sets most closely matching pattern and returns the result of
FcFontRenderPrepare for that font and the provided pattern. This function
should be called only after FcConfigSubstitute and FcDefaultSubstitute have
been called for p; otherwise the results will not be correct. If config is
NULL, the current configuration is used.
Version
Fontconfig version 2.8.0
FcFontSort
Name
FcFontSort -- Return list of matching fonts
Synopsis
#include <fontconfig.h>
FcFontSet * FcFontSort(FcConfig *config, FcPattern *p, FcBool trim, FcCharSet
**csp, FcResult *result);
Description
Returns the list of fonts sorted by closeness to p. If trim is FcTrue, elements
in the list which don't include Unicode coverage not provided by earlier
elements in the list are elided. The union of Unicode coverage of all of the
fonts is returned in csp, if csp is not NULL. This function should be called
only after FcConfigSubstitute and FcDefaultSubstitute have been called for p;
otherwise the results will not be correct.
The returned FcFontSet references FcPattern structures which may be shared by
the return value from multiple FcFontSort calls, applications must not modify
these patterns. Instead, they should be passed, along with p to
FcFontRenderPrepare which combines them into a complete pattern.
The FcFontSet returned by FcFontSort is destroyed by caling FcFontSetDestroy.
If config is NULL, the current configuration is used.
Version
Fontconfig version 2.8.0
FcFontRenderPrepare
Name
FcFontRenderPrepare -- Prepare pattern for loading font file
Synopsis
#include <fontconfig.h>
FcPattern * FcFontRenderPrepare(FcConfig *config, FcPattern *pat, FcPattern *
font);
Description
Creates a new pattern consisting of elements of font not appearing in pat,
elements of pat not appearing in font and the best matching value from pat for
elements appearing in both. The result is passed to FcConfigSubstituteWithPat
with kind FcMatchFont and then returned.
Version
Fontconfig version 2.8.0
FcFontList
Name
FcFontList -- List fonts
Synopsis
#include <fontconfig.h>
FcFontSet * FcFontList(FcConfig *config, FcPattern *p, FcObjectSet *os);
Description
Selects fonts matching p, creates patterns from those fonts containing only the
objects in os and returns the set of unique such patterns. If config is NULL,
the default configuration is checked to be up to date, and used.
Version
Fontconfig version 2.8.0
FcConfigFilename
Name
FcConfigFilename -- Find a config file
Synopsis
#include <fontconfig.h>
FcChar8 * FcConfigFilename(const FcChar8 *name);
Description
Given the specified external entity name, return the associated filename. This
provides applications a way to convert various configuration file references
into filename form.
A null or empty name indicates that the default configuration file should be
used; which file this references can be overridden with the FC_CONFIG_FILE
environment variable. Next, if the name starts with ~, it refers to a file in
the current users home directory. Otherwise if the name doesn't start with '/',
it refers to a file in the default configuration directory; the built-in
default directory can be overridden with the FC_CONFIG_DIR environment
variable.
Version
Fontconfig version 2.8.0
FcConfigParseAndLoad
Name
FcConfigParseAndLoad -- load a configuration file
Synopsis
#include <fontconfig.h>
FcBool FcConfigParseAndLoad(FcConfig *config, const FcChar8 *file, FcBool
complain);
Description
Walks the configuration in 'file' and constructs the internal representation in
'config'. Any include files referenced from within 'file' will be loaded and
parsed. If 'complain' is FcFalse, no warning will be displayed if 'file' does
not exist. Error and warning messages will be output to stderr. Returns FcFalse
if some error occurred while loading the file, either a parse error, semantic
error or allocation failure. Otherwise returns FcTrue.
Version
Fontconfig version 2.8.0
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FcObjectType
Table of Contents
FcNameRegisterObjectTypes -- Register object types
FcNameUnregisterObjectTypes -- Unregister object types
FcNameGetObjectType -- Lookup an object type
Provides for applcation-specified font name object types so that new pattern
elements can be generated from font names.
FcNameRegisterObjectTypes
Name
FcNameRegisterObjectTypes -- Register object types
Synopsis
#include <fontconfig.h>
FcBool FcNameRegisterObjectTypes(const FcObjectType *types, int ntype);
Description
Register ntype new object types. Returns FcFalse if some of the names cannot be
registered (due to allocation failure). Otherwise returns FcTrue.
Version
Fontconfig version 2.8.0
FcNameUnregisterObjectTypes
Name
FcNameUnregisterObjectTypes -- Unregister object types
Synopsis
#include <fontconfig.h>
FcBool FcNameUnregisterObjectTypes(const FcObjectType *types, int ntype);
Description
Unregister ntype object types. Returns FcTrue.
Version
Fontconfig version 2.8.0
FcNameGetObjectType
Name
FcNameGetObjectType -- Lookup an object type
Synopsis
#include <fontconfig.h>
const FcObjectType * FcNameGetObjectType(const char *object);
Description
Return the object type for the pattern element named object.
Version
Fontconfig version 2.8.0
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FcConstant
Table of Contents
FcNameRegisterConstants -- Register symbolic constants
FcNameUnregisterConstants -- Unregister symbolic constants
FcNameGetConstant -- Lookup symbolic constant
FcNameConstant -- Get the value for a symbolic constant
Provides for application-specified symbolic constants for font names.
FcNameRegisterConstants
Name
FcNameRegisterConstants -- Register symbolic constants
Synopsis
#include <fontconfig.h>
FcBool FcNameRegisterConstants(const FcConstant *consts, int nconsts);
Description
Register nconsts new symbolic constants. Returns FcFalse if the constants
cannot be registered (due to allocation failure). Otherwise returns FcTrue.
Version
Fontconfig version 2.8.0
FcNameUnregisterConstants
Name
FcNameUnregisterConstants -- Unregister symbolic constants
Synopsis
#include <fontconfig.h>
FcBool FcNameUnregisterConstants(const FcConstant *consts, int nconsts);
Description
Unregister nconsts symbolic constants. Returns FcFalse if the specified
constants were not registered. Otherwise returns FcTrue.
Version
Fontconfig version 2.8.0
FcNameGetConstant
Name
FcNameGetConstant -- Lookup symbolic constant
Synopsis
#include <fontconfig.h>
const FcConstant * FcNameGetConstant(FcChar8 *string);
Description
Return the FcConstant structure related to symbolic constant string.
Version
Fontconfig version 2.8.0
FcNameConstant
Name
FcNameConstant -- Get the value for a symbolic constant
Synopsis
#include <fontconfig.h>
FcBool FcNameConstant(FcChar8 *string, int *result);
Description
Returns whether a symbolic constant with name string is registered, placing the
value of the constant in result if present.
Version
Fontconfig version 2.8.0
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FcBlanks
Table of Contents
FcBlanksCreate -- Create an FcBlanks
FcBlanksDestroy -- Destroy and FcBlanks
FcBlanksAdd -- Add a character to an FcBlanks
FcBlanksIsMember -- Query membership in an FcBlanks
An FcBlanks object holds a list of Unicode chars which are expected to be blank
when drawn. When scanning new fonts, any glyphs which are empty and not in this
list will be assumed to be broken and not placed in the FcCharSet associated
with the font. This provides a significantly more accurate CharSet for
applications.
FcBlanksCreate
Name
FcBlanksCreate -- Create an FcBlanks
Synopsis
#include <fontconfig.h>
FcBlanks * FcBlanksCreate(void);
Description
Creates an empty FcBlanks object.
Version
Fontconfig version 2.8.0
FcBlanksDestroy
Name
FcBlanksDestroy -- Destroy and FcBlanks
Synopsis
#include <fontconfig.h>
void FcBlanksDestroy(FcBlanks *b);
Description
Destroys an FcBlanks object, freeing any associated memory.
Version
Fontconfig version 2.8.0
FcBlanksAdd
Name
FcBlanksAdd -- Add a character to an FcBlanks
Synopsis
#include <fontconfig.h>
FcBool FcBlanksAdd(FcBlanks *b, FcChar32 ucs4);
Description
Adds a single character to an FcBlanks object, returning FcFalse if this
process ran out of memory.
Version
Fontconfig version 2.8.0
FcBlanksIsMember
Name
FcBlanksIsMember -- Query membership in an FcBlanks
Synopsis
#include <fontconfig.h>
FcBool FcBlanksIsMember(FcBlanks *b, FcChar32 ucs4);
Description
Returns whether the specified FcBlanks object contains the indicated Unicode
value.
Version
Fontconfig version 2.8.0
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FcAtomic
Table of Contents
FcAtomicCreate -- create an FcAtomic object
FcAtomicLock -- lock a file
FcAtomicNewFile -- return new temporary file name
FcAtomicOrigFile -- return original file name
FcAtomicReplaceOrig -- replace original with new
FcAtomicDeleteNew -- delete new file
FcAtomicUnlock -- unlock a file
FcAtomicDestroy -- destroy an FcAtomic object
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.
FcAtomicCreate
Name
FcAtomicCreate -- create an FcAtomic object
Synopsis
#include <fontconfig.h>
FcAtomic * FcAtomicCreate(const FcChar8 *file);
Description
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.
Version
Fontconfig version 2.8.0
FcAtomicLock
Name
FcAtomicLock -- lock a file
Synopsis
#include <fontconfig.h>
FcBool FcAtomicLock(FcAtomic *atomic);
Description
Attempts to lock the file referenced by atomic. Returns FcFalse if the file is
already locked, else returns FcTrue and leaves the file locked.
Version
Fontconfig version 2.8.0
FcAtomicNewFile
Name
FcAtomicNewFile -- return new temporary file name
Synopsis
#include <fontconfig.h>
FcChar8 * FcAtomicNewFile(FcAtomic *atomic);
Description
Returns the filename for writing a new version of the file referenced by atomic
.
Version
Fontconfig version 2.8.0
FcAtomicOrigFile
Name
FcAtomicOrigFile -- return original file name
Synopsis
#include <fontconfig.h>
FcChar8 * FcAtomicOrigFile(FcAtomic *atomic);
Description
Returns the file refernced by atomic.
Version
Fontconfig version 2.8.0
FcAtomicReplaceOrig
Name
FcAtomicReplaceOrig -- replace original with new
Synopsis
#include <fontconfig.h>
FcBool FcAtomicReplaceOrig(FcAtomic *atomic);
Description
Replaces the original file referenced by atomic with the new file. Returns
FcFalse if the file cannot be replaced due to permission issues in the
filesystem. Otherwise returns FcTrue.
Version
Fontconfig version 2.8.0
FcAtomicDeleteNew
Name
FcAtomicDeleteNew -- delete new file
Synopsis
#include <fontconfig.h>
void FcAtomicDeleteNew(FcAtomic *atomic);
Description
Deletes the new file. Used in error recovery to back out changes.
Version
Fontconfig version 2.8.0
FcAtomicUnlock
Name
FcAtomicUnlock -- unlock a file
Synopsis
#include <fontconfig.h>
void FcAtomicUnlock(FcAtomic *atomic);
Description
Unlocks the file.
Version
Fontconfig version 2.8.0
FcAtomicDestroy
Name
FcAtomicDestroy -- destroy an FcAtomic object
Synopsis
#include <fontconfig.h>
void FcAtomicDestroy(FcAtomic *atomic);
Description
Destroys atomic.
Version
Fontconfig version 2.8.0
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File and Directory routines
Table of Contents
FcFileScan -- scan a font file
FcFileIsDir -- check whether a file is a directory
FcDirScan -- scan a font directory without caching it
FcDirSave -- DEPRECATED: formerly used to save a directory cache
FcDirCacheUnlink -- Remove all caches related to dir
FcDirCacheValid -- check directory cache
FcDirCacheLoad -- load a directory cache
FcDirCacheRead -- read or construct a directory cache
FcDirCacheLoadFile -- load a cache file
FcDirCacheUnload -- unload a cache file
These routines work with font files and directories, including font directory
cache files.
FcFileScan
Name
FcFileScan -- scan a font file
Synopsis
#include <fontconfig.h>
FcBool FcFileScan(FcFontSet *set, FcStrSet *dirs, FcFileCache *cache, FcBlanks
*blanks, const FcChar8 *file, FcBool force);
Description
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. Whether fonts are found depends on
fontconfig policy as well as the current configuration. Internally, fontconfig
will ignore BDF and PCF fonts which are not in Unicode (or the effectively
equivalent ISO Latin-1) encoding as those are not usable by Unicode-based
applications. The configuration can ignore fonts based on filename or contents
of the font file itself. Returns FcFalse if any of the fonts cannot be added
(due to allocation failure). Otherwise returns FcTrue.
Version
Fontconfig version 2.8.0
FcFileIsDir
Name
FcFileIsDir -- check whether a file is a directory
Synopsis
#include <fontconfig.h>
FcBool FcFileIsDir(const FcChar8 *file);
Description
Returns FcTrue if file is a directory, otherwise returns FcFalse.
Version
Fontconfig version 2.8.0
FcDirScan
Name
FcDirScan -- scan a font directory without caching it
Synopsis
#include <fontconfig.h>
FcBool FcDirScan(FcFontSet *set, FcStrSet *dirs, FcFileCache *cache, FcBlanks *
blanks, const FcChar8 *dir, FcBool force);
Description
If cache is not zero or if force is FcFalse, this function currently returns
FcFalse. Otherwise, it scans an entire directory and adds all fonts found to
set. Any subdirectories found are added to dirs. Calling this function does not
create any cache files. Use FcDirCacheRead() if caching is desired.
Version
Fontconfig version 2.8.0
FcDirSave
Name
FcDirSave -- DEPRECATED: formerly used to save a directory cache
Synopsis
#include <fontconfig.h>
FcBool FcDirSave(FcFontSet *set, FcStrSet *dirs, const FcChar8 *dir);
Description
This function now does nothing aside from returning FcFalse. It used to creates
the per-directory cache file for dir and populates it with the fonts in set and
subdirectories in dirs. All of this functionality is now automatically managed
by FcDirCacheLoad and FcDirCacheRead.
Version
Fontconfig version 2.8.0
FcDirCacheUnlink
Name
FcDirCacheUnlink -- Remove all caches related to dir
Synopsis
#include <fontconfig.h>
FcBool FcDirCacheUnlink(const FcChar8 *dir, FcConfig *config);
Description
Scans the cache directories in config, removing any instances of the cache file
for dir. Returns FcFalse when some internal error occurs (out of memory, etc).
Errors actually unlinking any files are ignored.
Version
Fontconfig version 2.8.0
FcDirCacheValid
Name
FcDirCacheValid -- check directory cache
Synopsis
#include <fontconfig.h>
FcBool FcDirCacheValid(const FcChar8 *dir);
Description
Returns FcTrue if dir has an associated valid cache file, else returns FcFalse
Version
Fontconfig version 2.8.0
FcDirCacheLoad
Name
FcDirCacheLoad -- load a directory cache
Synopsis
#include <fontconfig.h>
FcCache * FcDirCacheLoad(const FcChar8 *dir, FcConfig *config, FcChar8 **
cache_file);
Description
Loads the cache related to dir. If no cache file exists, returns NULL. The name
of the cache file is returned in cache_file, unless that is NULL. See also
FcDirCacheRead.
Version
Fontconfig version 2.8.0
FcDirCacheRead
Name
FcDirCacheRead -- read or construct a directory cache
Synopsis
#include <fontconfig.h>
FcCache * FcDirCacheRead(const FcChar8 *dir, FcBool force, FcConfig *config);
Description
This returns a cache for dir. If force is FcFalse, then an existing, valid
cache file will be used. Otherwise, a new cache will be created by scanning the
directory and that returned.
Version
Fontconfig version 2.8.0
FcDirCacheLoadFile
Name
FcDirCacheLoadFile -- load a cache file
Synopsis
#include <fontconfig.h>
FcCache * FcDirCacheLoadFile(const FcChar8 *cache_file, struct stat *file_stat
);
Description
This function loads a directory cache from cache_file. If file_stat is
non-NULL, it will be filled with the results of stat(2) on the cache file.
Version
Fontconfig version 2.8.0
FcDirCacheUnload
Name
FcDirCacheUnload -- unload a cache file
Synopsis
#include <fontconfig.h>
void FcDirCacheUnload(FcCache *cache);
Description
This function dereferences cache. When no other references to it remain, all
memory associated with the cache will be freed.
Version
Fontconfig version 2.8.0
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FcCache routines
Table of Contents
FcCacheDir -- Return directory of cache
FcCacheCopySet -- Returns a copy of the fontset from cache
FcCacheSubdir -- Return the i'th subdirectory.
FcCacheNumSubdir -- Return the number of subdirectories in cache.
FcCacheNumFont -- Returns the number of fonts in cache.
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.
FcCacheDir
Name
FcCacheDir -- Return directory of cache
Synopsis
#include <fontconfig.h>
const FcChar8 * FcCacheDir(const FcCache *cache);
Description
This function returns the directory from which the cache was constructed.
Version
Fontconfig version 2.8.0
FcCacheCopySet
Name
FcCacheCopySet -- Returns a copy of the fontset from cache
Synopsis
#include <fontconfig.h>
FcFontSet * FcCacheCopySet(const FcCache *cache);
Description
The returned fontset contains each of the font patterns from cache. This
fontset may be modified, but the patterns from the cache are read-only.
Version
Fontconfig version 2.8.0
FcCacheSubdir
Name
FcCacheSubdir -- Return the i'th subdirectory.
Synopsis
#include <fontconfig.h>
const FcChar8 * FcCacheSubdir(const FcCache *cache, inti);
Description
The set of subdirectories stored in a cache file are indexed by this function,
i should range from 0 to n-1, where n is the return value from
FcCacheNumSubdir.
Version
Fontconfig version 2.8.0
FcCacheNumSubdir
Name
FcCacheNumSubdir -- Return the number of subdirectories in cache.
Synopsis
#include <fontconfig.h>
int FcCacheNumSubdir(const FcCache *cache);
Description
This returns the total number of subdirectories in the cache.
Version
Fontconfig version 2.8.0
FcCacheNumFont
Name
FcCacheNumFont -- Returns the number of fonts in cache.
Synopsis
#include <fontconfig.h>
int FcCacheNumFont(const FcCache *cache);
Description
This returns the number of fonts which would be included in the return from
FcCacheCopySet.
Version
Fontconfig version 2.8.0
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FcStrSet and FcStrList
Table of Contents
FcStrSetCreate -- create a string set
FcStrSetMember -- check set for membership
FcStrSetEqual -- check sets for equality
FcStrSetAdd -- add to a string set
FcStrSetAddFilename -- add a filename to a string set
FcStrSetDel -- delete from a string set
FcStrSetDestroy -- destroy a string set
FcStrListCreate -- create a string iterator
FcStrListNext -- get next string in iteration
FcStrListDone -- destroy a string iterator
A data structure for enumerating strings, used to list directories while
scanning the configuration as directories are added while scanning.
FcStrSetCreate
Name
FcStrSetCreate -- create a string set
Synopsis
#include <fontconfig.h>
FcStrSet * FcStrSetCreate(void);
Description
Create an empty set.
Version
Fontconfig version 2.8.0
FcStrSetMember
Name
FcStrSetMember -- check set for membership
Synopsis
#include <fontconfig.h>
FcBool FcStrSetMember(FcStrSet *set, const FcChar8 *s);
Description
Returns whether s is a member of set.
Version
Fontconfig version 2.8.0
FcStrSetEqual
Name
FcStrSetEqual -- check sets for equality
Synopsis
#include <fontconfig.h>
FcBool FcStrSetEqual(FcStrSet *set_a, FcStrSet *set_b);
Description
Returns whether set_a contains precisely the same strings as set_b. Ordering of
strings within the two sets is not considered.
Version
Fontconfig version 2.8.0
FcStrSetAdd
Name
FcStrSetAdd -- add to a string set
Synopsis
#include <fontconfig.h>
FcBool FcStrSetAdd(FcStrSet *set, const FcChar8 *s);
Description
Adds a copy of s to set.
Version
Fontconfig version 2.8.0
FcStrSetAddFilename
Name
FcStrSetAddFilename -- add a filename to a string set
Synopsis
#include <fontconfig.h>
FcBool FcStrSetAddFilename(FcStrSet *set, const FcChar8 *s);
Description
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.
Version
Fontconfig version 2.8.0
FcStrSetDel
Name
FcStrSetDel -- delete from a string set
Synopsis
#include <fontconfig.h>
FcBool FcStrSetDel(FcStrSet *set, const FcChar8 *s);
Description
Removes s from set, returning FcTrue if s was a member else FcFalse.
Version
Fontconfig version 2.8.0
FcStrSetDestroy
Name
FcStrSetDestroy -- destroy a string set
Synopsis
#include <fontconfig.h>
void FcStrSetDestroy(FcStrSet *set);
Description
Destroys set.
Version
Fontconfig version 2.8.0
FcStrListCreate
Name
FcStrListCreate -- create a string iterator
Synopsis
#include <fontconfig.h>
FcStrList * FcStrListCreate(FcStrSet *set);
Description
Creates an iterator to list the strings in set.
Version
Fontconfig version 2.8.0
FcStrListNext
Name
FcStrListNext -- get next string in iteration
Synopsis
#include <fontconfig.h>
FcChar8 * FcStrListNext(FcStrList *list);
Description
Returns the next string in set.
Version
Fontconfig version 2.8.0
FcStrListDone
Name
FcStrListDone -- destroy a string iterator
Synopsis
#include <fontconfig.h>
void FcStrListDone(FcStrList *list);
Description
Destroys the enumerator list.
Version
Fontconfig version 2.8.0
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String utilities
Table of Contents
FcUtf8ToUcs4 -- convert UTF-8 to UCS4
FcUcs4ToUtf8 -- convert UCS4 to UTF-8
FcUtf8Len -- count UTF-8 encoded chars
FcUtf16ToUcs4 -- convert UTF-16 to UCS4
FcUtf16Len -- count UTF-16 encoded chars
FcIsLower -- check for lower case ASCII character
FcIsUpper -- check for upper case ASCII character
FcToLower -- convert upper case ASCII to lower case
FcStrCopy -- duplicate a string
FcStrDowncase -- create a lower case translation of a string
FcStrCopyFilename -- create a complete path from a filename
FcStrCmp -- compare UTF-8 strings
FcStrCmpIgnoreCase -- compare UTF-8 strings ignoring case
FcStrStr -- locate UTF-8 substring
FcStrStrIgnoreCase -- locate UTF-8 substring ignoring ASCII case
FcStrPlus -- concatenate two strings
FcStrFree -- free a string
FcStrDirname -- directory part of filename
FcStrBasename -- last component of filename
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.
FcUtf8ToUcs4
Name
FcUtf8ToUcs4 -- convert UTF-8 to UCS4
Synopsis
#include <fontconfig.h>
int FcUtf8ToUcs4(FcChar8 *src, FcChar32 *dst, int len);
Description
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.
Version
Fontconfig version 2.8.0
FcUcs4ToUtf8
Name
FcUcs4ToUtf8 -- convert UCS4 to UTF-8
Synopsis
#include <fontconfig.h>
int FcUcs4ToUtf8(FcChar32 src, FcChar8 dst[FC_UTF8_MAX_LEN]);
Description
Converts the Unicode char from src into dst and returns the number of bytes
needed to encode the char.
Version
Fontconfig version 2.8.0
FcUtf8Len
Name
FcUtf8Len -- count UTF-8 encoded chars
Synopsis
#include <fontconfig.h>
FcBool FcUtf8Len(FcChar8 *src, int len, int *nchar, int *wchar);
Description
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.
Version
Fontconfig version 2.8.0
FcUtf16ToUcs4
Name
FcUtf16ToUcs4 -- convert UTF-16 to UCS4
Synopsis
#include <fontconfig.h>
int FcUtf16ToUcs4(FcChar8 *src, FcEndian endian, FcChar32 *dst, int len);
Description
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.
Version
Fontconfig version 2.8.0
FcUtf16Len
Name
FcUtf16Len -- count UTF-16 encoded chars
Synopsis
#include <fontconfig.h>
FcBool FcUtf16Len(FcChar8 *src, FcEndian endian, int len, int *nchar, int *
wchar);
Description
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.
Version
Fontconfig version 2.8.0
FcIsLower
Name
FcIsLower -- check for lower case ASCII character
Synopsis
#include <fontconfig.h>
FcBool FcIsLower(FcChar8c);
Description
This macro checks whether c is an lower case ASCII letter.
Version
Fontconfig version 2.8.0
FcIsUpper
Name
FcIsUpper -- check for upper case ASCII character
Synopsis
#include <fontconfig.h>
FcBool FcIsUpper(FcChar8c);
Description
This macro checks whether c is a upper case ASCII letter.
Version
Fontconfig version 2.8.0
FcToLower
Name
FcToLower -- convert upper case ASCII to lower case
Synopsis
#include <fontconfig.h>
FcChar8 FcToLower(FcChar8c);
Description
This macro converts upper case ASCII c to the equivalent lower case letter.
Version
Fontconfig version 2.8.0
FcStrCopy
Name
FcStrCopy -- duplicate a string
Synopsis
#include <fontconfig.h>
FcChar8 * FcStrCopy(const FcChar8 *s);
Description
Allocates memory, copies s and returns the resulting buffer. Yes, this is
strdup, but that function isn't available on every platform.
Version
Fontconfig version 2.8.0
FcStrDowncase
Name
FcStrDowncase -- create a lower case translation of a string
Synopsis
#include <fontconfig.h>
FcChar8 * FcStrDowncase(const FcChar8 *s);
Description
Allocates memory, copies s, converting upper case letters to lower case and
returns the allocated buffer.
Version
Fontconfig version 2.8.0
FcStrCopyFilename
Name
FcStrCopyFilename -- create a complete path from a filename
Synopsis
#include <fontconfig.h>
FcChar8 * FcStrCopyFilename(const FcChar8 *s);
Description
FcStrCopyFilename constructs an absolute pathname from s. It converts any
leading '~' characters in to the value of the HOME environment variable, and
any relative paths are converted to absolute paths using the current working
directory. Sequences of '/' characters are converted to a single '/', and names
containing the current directory '.' or parent directory '..' are correctly
reconstructed. Returns NULL if '~' is the leading character and HOME is unset
or disabled (see FcConfigEnableHome).
Version
Fontconfig version 2.8.0
FcStrCmp
Name
FcStrCmp -- compare UTF-8 strings
Synopsis
#include <fontconfig.h>
int FcStrCmp(const FcChar8 *s1, const FcChar8 *s2);
Description
Returns the usual <0, 0, >0 result of comparing s1 and s2.
Version
Fontconfig version 2.8.0
FcStrCmpIgnoreCase
Name
FcStrCmpIgnoreCase -- compare UTF-8 strings ignoring case
Synopsis
#include <fontconfig.h>
int FcStrCmpIgnoreCase(const FcChar8 *s1, const FcChar8 *s2);
Description
Returns the usual <0, 0, >0 result of comparing s1 and s2. This test is
case-insensitive for all proper UTF-8 encoded strings.
Version
Fontconfig version 2.8.0
FcStrStr
Name
FcStrStr -- locate UTF-8 substring
Synopsis
#include <fontconfig.h>
FcChar8 * FcStrStr(const FcChar8 *s1, const FcChar8 *s2);
Description
Returns the location of s2 in s1. Returns NULL if s2 is not present in s1. This
test will operate properly with UTF8 encoded strings.
Version
Fontconfig version 2.8.0
FcStrStrIgnoreCase
Name
FcStrStrIgnoreCase -- locate UTF-8 substring ignoring ASCII case
Synopsis
#include <fontconfig.h>
FcChar8 * FcStrStrIgnoreCase(const FcChar8 *s1, const FcChar8 *s2);
Description
Returns the location of s2 in s1, ignoring case. Returns NULL if s2 is not
present in s1. This test is case-insensitive for all proper UTF-8 encoded
strings.
Version
Fontconfig version 2.8.0
FcStrPlus
Name
FcStrPlus -- concatenate two strings
Synopsis
#include <fontconfig.h>
FcChar8 * FcStrPlus(const FcChar8 *s1, const FcChar8 *s2);
Description
This function allocates new storage and places the concatenation of s1 and s2
there, returning the new string.
Version
Fontconfig version 2.8.0
FcStrFree
Name
FcStrFree -- free a string
Synopsis
#include <fontconfig.h>
void FcStrFree(FcChar8 *s);
Description
This is just a wrapper around free(3) which helps track memory usage of strings
within the fontconfig library.
Version
Fontconfig version 2.8.0
FcStrDirname
Name
FcStrDirname -- directory part of filename
Synopsis
#include <fontconfig.h>
FcChar8 * FcStrDirname(const FcChar8 *file);
Description
Returns the directory containing file. This is returned in newly allocated
storage which should be freed when no longer needed.
Version
Fontconfig version 2.8.0
FcStrBasename
Name
FcStrBasename -- last component of filename
Synopsis
#include <fontconfig.h>
FcChar8 * FcStrBasename(const FcChar8 *file);
Description
Returns the filename of file stripped of any leading directory names. This is
returned in newly allocated storage which should be freed when no longer
needed.
Version
Fontconfig version 2.8.0
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