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Diffstat (limited to 'fontconfig/doc/fcconfig.fncs')
| -rw-r--r-- | fontconfig/doc/fcconfig.fncs | 373 |
1 files changed, 373 insertions, 0 deletions
diff --git a/fontconfig/doc/fcconfig.fncs b/fontconfig/doc/fcconfig.fncs new file mode 100644 index 000000000..8bb953b34 --- /dev/null +++ b/fontconfig/doc/fcconfig.fncs @@ -0,0 +1,373 @@ +/* + * fontconfig/doc/fcconfig.fncs + * + * Copyright © 2003 Keith Packard + * + * Permission to use, copy, modify, distribute, and sell this software and its + * documentation for any purpose is hereby granted without fee, provided that + * the above copyright notice appear in all copies and that both that + * copyright notice and this permission notice appear in supporting + * documentation, and that the name of Keith Packard not be used in + * 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. + */ +@RET@ FcConfig * +@FUNC@ FcConfigCreate +@TYPE1@ void +@PURPOSE@ Create a configuration +@DESC@ +Creates an empty configuration. +@@ + +@RET@ FcConfig * +@FUNC@ FcConfigReference +@TYPE1@ FcConfig * @ARG1@ config +@PURPOSE@ Increment config reference count +@DESC@ +Add another reference to <parameter>config</parameter>. Configs are freed only +when the reference count reaches zero. +If <parameter>config</parameter> 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. +@@ + +@RET@ void +@FUNC@ FcConfigDestroy +@TYPE1@ FcConfig * @ARG1@ config +@PURPOSE@ Destroy a configuration +@DESC@ +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. +@@ + +@RET@ FcBool +@FUNC@ FcConfigSetCurrent +@TYPE1@ FcConfig * @ARG1@ config +@PURPOSE@ Set configuration as default +@DESC@ +Sets the current default configuration to <parameter>config</parameter>. Implicitly calls +FcConfigBuildFonts if necessary, returning FcFalse if that call fails. +@@ + +@RET@ FcConfig * +@FUNC@ FcConfigGetCurrent +@TYPE1@ void +@PURPOSE@ Return current configuration +@DESC@ +Returns the current default configuration. +@@ + +@RET@ FcBool +@FUNC@ FcConfigUptoDate +@TYPE1@ FcConfig * @ARG1@ config +@PURPOSE@ Check timestamps on config files +@DESC@ +Checks all of the files related to <parameter>config</parameter> and returns +whether any of them has been modified since the configuration was created. +If <parameter>config</parameter> is NULL, the current configuration is used. +@@ + +@RET@ FcChar8 * +@FUNC@ FcConfigHome +@TYPE1@ void +@PURPOSE@ return the current home directory. +@DESC@ +Return the current user's home directory, if it is available, and if using it +is enabled, and NULL otherwise. +See also <function>FcConfigEnableHome</function>). +@@ + +@RET@ FcBol +@FUNC@ FcConfigEnableHome +@TYPE1@ FcBool% @ARG1@ enable +@PURPOSE@ controls use of the home directory. +@DESC@ +If <parameter>enable</parameter> 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 <parameter>enable</parameter> is +FcFalse, then all use of the home directory in these contexts will be +disabled. The previous setting of the value is returned. +@@ + +@RET@ FcBool +@FUNC@ FcConfigBuildFonts +@TYPE1@ FcConfig * @ARG1@ config +@PURPOSE@ Build font database +@DESC@ +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 <parameter>config</parameter> is NULL, the current configuration is used. +@@ + +@RET@ FcStrList * +@FUNC@ FcConfigGetConfigDirs +@TYPE1@ FcConfig * @ARG1@ config +@PURPOSE@ Get config directories +@DESC@ +Returns the list of font directories specified in the configuration files +for <parameter>config</parameter>. Does not include any subdirectories. +If <parameter>config</parameter> is NULL, the current configuration is used. +@@ + +@RET@ FcStrList * +@FUNC@ FcConfigGetFontDirs +@TYPE1@ FcConfig * @ARG1@ config +@PURPOSE@ Get font directories +@DESC@ +Returns the list of font directories in <parameter>config</parameter>. This includes the +configured font directories along with any directories below those in the +filesystem. +If <parameter>config</parameter> is NULL, the current configuration is used. +@@ + +@RET@ FcStrList * +@FUNC@ FcConfigGetConfigFiles +@TYPE1@ FcConfig * @ARG1@ config +@PURPOSE@ Get config files +@DESC@ +Returns the list of known configuration files used to generate <parameter>config</parameter>. +If <parameter>config</parameter> is NULL, the current configuration is used. +@@ + +@RET@ FcChar8 * +@FUNC@ FcConfigGetCache +@TYPE1@ FcConfig * @ARG1@ config +@PURPOSE@ DEPRECATED used to return per-user cache filename +@DESC@ +With fontconfig no longer using per-user cache files, this function now +simply returns NULL to indicate that no per-user file exists. +@@ + +@RET@ FcStrList * +@FUNC@ FcConfigGetCacheDirs +@TYPE1@ FcConfig * @ARG1@ config +@PURPOSE@ return the list of directories searched for cache files +@DESC@ +<function>FcConfigGetCacheDirs</function> 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 <parameter>config</parameter> is NULL, the current configuration is used. +@@ + +@RET@ FcFontSet * +@FUNC@ FcConfigGetFonts +@TYPE1@ FcConfig * @ARG1@ config +@TYPE2@ FcSetName% @ARG2@ set +@PURPOSE@ Get config font set +@DESC@ +Returns one of the two sets of fonts from the configuration as specified +by <parameter>set</parameter>. This font set is owned by the library and must +not be modified or freed. +If <parameter>config</parameter> is NULL, the current configuration is used. +@@ + +@RET@ FcBlanks * +@FUNC@ FcConfigGetBlanks +@TYPE1@ FcConfig * @ARG1@ config +@PURPOSE@ Get config blanks +@DESC@ +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 <parameter>config</parameter> is NULL, the current configuration is used. +@@ + +@RET@ int +@FUNC@ FcConfigGetRescanInterval +@TYPE1@ FcConfig * @ARG1@ config +@PURPOSE@ Get config rescan interval +@DESC@ +Returns the interval between automatic checks of the configuration (in +seconds) specified in <parameter>config</parameter>. 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 <parameter>config</parameter> is NULL, the current configuration is used. +@@ + +@RET@ FcBool +@FUNC@ FcConfigSetRescanInterval +@TYPE1@ FcConfig * @ARG1@ config +@TYPE2@ int% @ARG2@ rescanInterval +@PURPOSE@ Set config rescan interval +@DESC@ +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 <parameter>config</parameter> is NULL, the current configuration is used. +@@ + +@RET@ FcBool +@FUNC@ FcConfigAppFontAddFile +@TYPE1@ FcConfig * @ARG1@ config +@TYPE2@ const FcChar8 * @ARG2@ file +@PURPOSE@ Add font file to font database +@DESC@ +Adds an application-specific font to the configuration. Returns FcFalse +if the fonts cannot be added (due to allocation failure). Otherwise returns FcTrue. +If <parameter>config</parameter> is NULL, the current configuration is used. +@@ + +@RET@ FcBool +@FUNC@ FcConfigAppFontAddDir +@TYPE1@ FcConfig * @ARG1@ config +@TYPE2@ const FcChar8 * @ARG2@ dir +@PURPOSE@ Add fonts from directory to font database +@DESC@ +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 <parameter>config</parameter> is NULL, the current configuration is used. +@@ + +@RET@ void +@FUNC@ FcConfigAppFontClear +@TYPE1@ FcConfig * @ARG1@ config +@PURPOSE@ Remove all app fonts from font database +@DESC@ +Clears the set of application-specific fonts. +If <parameter>config</parameter> is NULL, the current configuration is used. +@@ + +@RET@ FcBool +@FUNC@ FcConfigSubstituteWithPat +@TYPE1@ FcConfig * @ARG1@ config +@TYPE2@ FcPattern * @ARG2@ p +@TYPE3@ FcPattern * @ARG3@ p_pat +@TYPE4@ FcMatchKind% @ARG4@ kind +@PURPOSE@ Execute substitutions +@DESC@ +Performs the sequence of pattern modification operations, if <parameter>kind</parameter> is +FcMatchPattern, then those tagged as pattern operations are applied, else +if <parameter>kind</parameter> 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 <parameter>config</parameter> is NULL, the current configuration is used. +@@ + +@RET@ FcBool +@FUNC@ FcConfigSubstitute +@TYPE1@ FcConfig * @ARG1@ config +@TYPE2@ FcPattern * @ARG2@ p +@TYPE3@ FcMatchKind% @ARG3@ kind +@PURPOSE@ Execute substitutions +@DESC@ +Calls FcConfigSubstituteWithPat setting p_pat to NULL. Returns FcFalse +if the substitution cannot be performed (due to allocation failure). Otherwise returns FcTrue. +If <parameter>config</parameter> is NULL, the current configuration is used. +@@ + +@RET@ FcPattern * +@FUNC@ FcFontMatch +@TYPE1@ FcConfig * @ARG1@ config +@TYPE2@ FcPattern * @ARG2@ p +@TYPE3@ FcResult * @ARG3@ result +@PURPOSE@ Return best font +@DESC@ +Finds the font in <parameter>sets</parameter> most closely matching +<parameter>pattern</parameter> and returns the result of +<function>FcFontRenderPrepare</function> for that font and the provided +pattern. This function should be called only after +<function>FcConfigSubstitute</function> and +<function>FcDefaultSubstitute</function> have been called for +<parameter>p</parameter>; otherwise the results will not be correct. +If <parameter>config</parameter> is NULL, the current configuration is used. +@@ + +@RET@ FcFontSet * +@FUNC@ FcFontSort +@TYPE1@ FcConfig * @ARG1@ config +@TYPE2@ FcPattern * @ARG2@ p +@TYPE3@ FcBool% @ARG3@ trim +@TYPE4@ FcCharSet ** @ARG4@ csp +@TYPE5@ FcResult * @ARG5@ result +@PURPOSE@ Return list of matching fonts +@DESC@ +Returns the list of fonts sorted by closeness to <parameter>p</parameter>. If <parameter>trim</parameter> 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 <parameter>csp</parameter>, if <parameter>csp</parameter> is not NULL. This function +should be called only after FcConfigSubstitute and FcDefaultSubstitute have +been called for <parameter>p</parameter>; otherwise the results will not be correct. + </para><para> +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 <parameter>p</parameter> to +<function>FcFontRenderPrepare</function> which combines them into a complete pattern. + </para><para> +The FcFontSet returned by FcFontSort is destroyed by caling FcFontSetDestroy. +If <parameter>config</parameter> is NULL, the current configuration is used. +@@ + +@RET@ FcPattern * +@FUNC@ FcFontRenderPrepare +@TYPE1@ FcConfig * @ARG1@ config +@TYPE2@ FcPattern * @ARG2@ pat +@TYPE3@ FcPattern * @ARG3@ font +@PURPOSE@ Prepare pattern for loading font file +@DESC@ +Creates a new pattern consisting of elements of <parameter>font</parameter> not appearing +in <parameter>pat</parameter>, elements of <parameter>pat</parameter> not appearing in <parameter>font</parameter> and the best matching +value from <parameter>pat</parameter> for elements appearing in both. The result is passed to +FcConfigSubstituteWithPat with <parameter>kind</parameter> FcMatchFont and then returned. +@@ + +@RET@ FcFontSet * +@FUNC@ FcFontList +@TYPE1@ FcConfig * @ARG1@ config +@TYPE2@ FcPattern * @ARG2@ p +@TYPE3@ FcObjectSet * @ARG3@ os +@PURPOSE@ List fonts +@DESC@ +Selects fonts matching <parameter>p</parameter>, creates patterns from those fonts containing +only the objects in <parameter>os</parameter> and returns the set of unique such patterns. +If <parameter>config</parameter> is NULL, the default configuration is checked +to be up to date, and used. +@@ + +@RET@ FcChar8 * +@FUNC@ FcConfigFilename +@TYPE1@ const FcChar8 * @ARG1@ name +@PURPOSE@ Find a config file +@DESC@ +Given the specified external entity name, return the associated filename. +This provides applications a way to convert various configuration file +references into filename form. + </para><para> +A null or empty <parameter>name</parameter> 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 <parameter>~</parameter>, 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. +@@ + +@RET@ FcBool +@FUNC@ FcConfigParseAndLoad +@TYPE1@ FcConfig * @ARG1@ config +@TYPE2@ const FcChar8 * @ARG2@ file +@TYPE3@ FcBool% @ARG3@ complain +@PURPOSE@ load a configuration file +@DESC@ +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. +@@ |