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/* Pango
* pango-ot-tag.h:
*
* Copyright (C) 2007 Red Hat Software
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include "pango-ot-private.h"
/**
* pango_ot_tag_from_script:
* @script: A #PangoScript
*
* Finds the OpenType script tag corresponding to @script.
*
* The %PANGO_SCRIPT_COMMON, %PANGO_SCRIPT_INHERITED, and
* %PANGO_SCRIPT_UNKNOWN scripts are mapped to the OpenType
* 'DFLT' script tag that is also defined as
* %PANGO_OT_TAG_DEFAULT_SCRIPT.
*
* Note that multiple #PangoScript values may map to the same
* OpenType script tag. In particular, %PANGO_SCRIPT_HIRAGANA
* and %PANGO_SCRIPT_KATAKANA both map to the OT tag 'kana'.
*
* Return value: #PangoOTTag corresponding to @script or
* %PANGO_OT_TAG_DEFAULT_SCRIPT if none found.
*
* Since: 1.18
**/
PangoOTTag
pango_ot_tag_from_script (PangoScript script)
{
unsigned int count = 1;
hb_tag_t tags[1];
hb_ot_tags_from_script_and_language ((hb_script_t) g_unicode_script_to_iso15924 ((GUnicodeScript) script),
HB_LANGUAGE_INVALID,
&count,
tags,
NULL, NULL);
if (count > 0)
return (PangoOTTag) tags[0];
return PANGO_OT_TAG_DEFAULT_SCRIPT;
}
/**
* pango_ot_tag_to_script:
* @script_tag: A #PangoOTTag OpenType script tag
*
* Finds the #PangoScript corresponding to @script_tag.
*
* The 'DFLT' script tag is mapped to %PANGO_SCRIPT_COMMON.
*
* Note that an OpenType script tag may correspond to multiple
* #PangoScript values. In such cases, the #PangoScript value
* with the smallest value is returned.
* In particular, %PANGO_SCRIPT_HIRAGANA
* and %PANGO_SCRIPT_KATAKANA both map to the OT tag 'kana'.
* This function will return %PANGO_SCRIPT_HIRAGANA for
* 'kana'.
*
* Return value: #PangoScript corresponding to @script_tag or
* %PANGO_SCRIPT_UNKNOWN if none found.
*
* Since: 1.18
**/
PangoScript
pango_ot_tag_to_script (PangoOTTag script_tag)
{
return (PangoScript) g_unicode_script_from_iso15924 (hb_ot_tag_to_script ((hb_tag_t) script_tag));
}
/**
* pango_ot_tag_from_language:
* @language: (nullable): A #PangoLanguage, or %NULL
*
* Finds the OpenType language-system tag best describing @language.
*
* Return value: #PangoOTTag best matching @language or
* %PANGO_OT_TAG_DEFAULT_LANGUAGE if none found or if @language
* is %NULL.
*
* Since: 1.18
**/
PangoOTTag
pango_ot_tag_from_language (PangoLanguage *language)
{
unsigned int count = 1;
hb_tag_t tags[1];
hb_ot_tags_from_script_and_language (HB_SCRIPT_UNKNOWN,
hb_language_from_string (pango_language_to_string (language), -1),
NULL, NULL,
&count, tags);
if (count > 0)
return (PangoOTTag) tags[0];
return PANGO_OT_TAG_DEFAULT_LANGUAGE;
}
/**
* pango_ot_tag_to_language:
* @language_tag: A #PangoOTTag OpenType language-system tag
*
* Finds a #PangoLanguage corresponding to @language_tag.
*
* Return value: #PangoLanguage best matching @language_tag or
* #PangoLanguage corresponding to the string "xx" if none found.
*
* Since: 1.18
**/
PangoLanguage *
pango_ot_tag_to_language (PangoOTTag language_tag)
{
return pango_language_from_string (hb_language_to_string (hb_ot_tag_to_language ((hb_tag_t) language_tag)));
}
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