fontconfig/doc/fccharset.fncs

205 lines
6.6 KiB
Plaintext

/*
* fontconfig/doc/fccharset.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.
*
* KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* 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@ FcCharSet *
@FUNC@ FcCharSetCreate
@TYPE1@ void
@PURPOSE@ Create an empty character set
@DESC@
<function>FcCharSetCreate</function> allocates and initializes a new empty
character set object.
@@
@RET@ void
@FUNC@ FcCharSetDestroy
@TYPE1@ FcCharSet * @ARG1@ fcs
@PURPOSE@ Destroy a character set
@DESC@
<function>FcCharSetDestroy</function> decrements the reference count
<parameter>fcs</parameter>. If the reference count becomes zero, all
memory referenced is freed.
@@
@RET@ FcBool
@FUNC@ FcCharSetAddChar
@TYPE1@ FcCharSet * @ARG1@ fcs
@TYPE2@ FcChar32% @ARG2@ ucs4
@PURPOSE@ Add a character to a charset
@DESC@
<function>FcCharSetAddChar</function> 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.
@@
@RET@ FcCharSet *
@FUNC@ FcCharSetCopy
@TYPE1@ FcCharSet * @ARG1@ src
@PURPOSE@ Copy a charset
@DESC@
Makes a copy of <parameter>src</parameter>; note that this may not actually do anything more
than increment the reference count on <parameter>src</parameter>.
@@
@RET@ FcBool
@FUNC@ FcCharSetEqual
@TYPE1@ const FcCharSet * @ARG1@ a
@TYPE2@ const FcCharSet * @ARG2@ b
@PURPOSE@ Compare two charsets
@DESC@
Returns whether <parameter>a</parameter> and <parameter>b</parameter>
contain the same set of unicode chars.
@@
@RET@ FcCharSet *
@FUNC@ FcCharSetIntersect
@TYPE1@ const FcCharSet * @ARG1@ a
@TYPE2@ const FcCharSet * @ARG2@ b
@PURPOSE@ Intersect charsets
@DESC@
Returns a set including only those chars found in both
<parameter>a</parameter> and <parameter>b</parameter>.
@@
@RET@ FcCharSet *
@FUNC@ FcCharSetUnion
@TYPE1@ const FcCharSet * @ARG1@ a
@TYPE2@ const FcCharSet * @ARG2@ b
@PURPOSE@ Add charsets
@DESC@
Returns a set including only those chars found in either <parameter>a</parameter> or <parameter>b</parameter>.
@@
@RET@ FcCharSet *
@FUNC@ FcCharSetSubtract
@TYPE1@ const FcCharSet * @ARG1@ a
@TYPE2@ const FcCharSet * @ARG2@ b
@PURPOSE@ Subtract charsets
@DESC@
Returns a set including only those chars found in <parameter>a</parameter> but not <parameter>b</parameter>.
@@
@RET@ FcCharSet *
@FUNC@ FcCharSetMerge
@TYPE1@ const FcCharSet * @ARG1@ a
@TYPE2@ const FcCharSet * @ARG2@ b
@PURPOSE@ Merge charsets
@DESC@
If <parameter>a</parameter> is NULL, returns a newly-created copy of <parameter>b</parameter>.
If <parameter>a</parameter> is an FcCharSet object owned by fontconfig that
cannot be modified, it returns the union of <parameter>a</parameter> and
<parameter>b</parameter> in a newly-created FcCharSet object.
Otherwise, adds all chars in <parameter>b</parameter> to <parameter>a</parameter> and returns <parameter>a</parameter>. In other words, this is an in-place versionof FcCharSetUnion.
@@
@RET@ FcBool
@FUNC@ FcCharSetHasChar
@TYPE1@ const FcCharSet * @ARG1@ fcs
@TYPE2@ FcChar32% @ARG2@ ucs4
@PURPOSE@ Check a charset for a char
@DESC@
Returns whether <parameter>fcs</parameter> contains the char <parameter>ucs4</parameter>.
@@
@RET@ FcChar32
@FUNC@ FcCharSetCount
@TYPE1@ const FcCharSet * @ARG1@ a
@PURPOSE@ Count entries in a charset
@DESC@
Returns the total number of unicode chars in <parameter>a</parameter>.
@@
@RET@ FcChar32
@FUNC@ FcCharSetIntersectCount
@TYPE1@ const FcCharSet * @ARG1@ a
@TYPE2@ const FcCharSet * @ARG2@ b
@PURPOSE@ Intersect and count charsets
@DESC@
Returns the number of chars that are in both <parameter>a</parameter> and <parameter>b</parameter>.
@@
@RET@ FcChar32
@FUNC@ FcCharSetSubtractCount
@TYPE1@ const FcCharSet * @ARG1@ a
@TYPE2@ const FcCharSet * @ARG2@ b
@PURPOSE@ Subtract and count charsets
@DESC@
Returns the number of chars that are in <parameter>a</parameter> but not in <parameter>b</parameter>.
@@
@RET@ FcBool
@FUNC@ FcCharSetIsSubset
@TYPE1@ const FcCharSet * @ARG1@ a
@TYPE2@ const FcCharSet * @ARG2@ b
@PURPOSE@ Test for charset inclusion
@DESC@
Returns whether <parameter>a</parameter> is a subset of <parameter>b</parameter>.
@@
@RET@ FcChar32
@FUNC@ FcCharSetFirstPage
@TYPE1@ const FcCharSet * @ARG1@ a
@TYPE2@ FcChar32[FC_CHARSET_MAP_SIZE]% @ARG2@ map
@TYPE3@ FcChar32 * @ARG3@ next
@PURPOSE@ Start enumerating charset contents
@DESC@
Builds an array of bits marking the first page of Unicode coverage of
<parameter>a</parameter>. Returns the base of the array. <parameter>next</parameter> contains the next page in the
font.
@@
@RET@ FcChar32
@FUNC@ FcCharSetNextPage
@TYPE1@ const FcCharSet * @ARG1@ a
@TYPE2@ FcChar32[FC_CHARSET_MAP_SIZE]% @ARG2@ map
@TYPE3@ FcChar32 * @ARG3@ next
@PURPOSE@ Continue enumerating charset contents
@DESC@
Builds an array of bits marking the Unicode coverage of <parameter>a</parameter> for page
<parameter>*next</parameter>. Returns the base of the array. <parameter>next</parameter> contains the next page in
the font.
@@
@RET@ FcChar32
@FUNC@ FcCharSetCoverage
@TYPE1@ const FcCharSet * @ARG1@ a
@TYPE2@ FcChar32 @ARG2@ page
@TYPE3@ FcChar32[8] @ARG3@ result
@PURPOSE@ DEPRECATED return coverage for a Unicode page
@DESC@
DEPRECATED
This function returns a bitmask in <parameter>result</parameter> which
indicates which code points in
<parameter>page</parameter> are included in <parameter>a</parameter>.
<function>FcCharSetCoverage</function> returns the next page in the charset which has any
coverage.
@@
@RET@ FcCharSet *
@FUNC@ FcCharSetNew
@TYPE1@ void
@PURPOSE@ DEPRECATED alias for FcCharSetCreate
@DESC@
<function>FcCharSetNew</function> is a DEPRECATED alias for FcCharSetCreate.
@@