/*
* Copyright © 2013 Google, Inc.
*
* This is part of HarfBuzz, a text shaping library.
*
* Permission is hereby granted, without written agreement and without
* license or royalty fees, to use, copy, modify, and distribute this
* software and its documentation for any purpose, provided that the
* above copyright notice and the following two paragraphs appear in
* all copies of this software.
*
* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*
* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
*
* Google Author(s): Behdad Esfahbod
*/
#ifndef HB_OT_LAYOUT_JSTF_TABLE_HH
#define HB_OT_LAYOUT_JSTF_TABLE_HH
#include "hb-open-type.hh"
#include "hb-ot-layout-gpos-table.hh"
namespace OT {
/*
* JstfModList -- Justification Modification List Tables
*/
typedef IndexArray JstfModList;
/*
* JstfMax -- Justification Maximum Table
*/
typedef OffsetListOf<PosLookup> JstfMax;
/*
* JstfPriority -- Justification Priority Table
*/
struct JstfPriority
{
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this) &&
shrinkageEnableGSUB.sanitize (c, this) &&
shrinkageDisableGSUB.sanitize (c, this) &&
shrinkageEnableGPOS.sanitize (c, this) &&
shrinkageDisableGPOS.sanitize (c, this) &&
shrinkageJstfMax.sanitize (c, this) &&
extensionEnableGSUB.sanitize (c, this) &&
extensionDisableGSUB.sanitize (c, this) &&
extensionEnableGPOS.sanitize (c, this) &&
extensionDisableGPOS.sanitize (c, this) &&
extensionJstfMax.sanitize (c, this));
}
protected:
OffsetTo<JstfModList>
shrinkageEnableGSUB; /* Offset to Shrinkage Enable GSUB
* JstfModList table--from beginning of
* JstfPriority table--may be NULL */
OffsetTo<JstfModList>
shrinkageDisableGSUB; /* Offset to Shrinkage Disable GSUB
* JstfModList table--from beginning of
* JstfPriority table--may be NULL */
OffsetTo<JstfModList>
shrinkageEnableGPOS; /* Offset to Shrinkage Enable GPOS
* JstfModList table--from beginning of
* JstfPriority table--may be NULL */
OffsetTo<JstfModList>
shrinkageDisableGPOS; /* Offset to Shrinkage Disable GPOS
* JstfModList table--from beginning of
* JstfPriority table--may be NULL */
OffsetTo<JstfMax>
shrinkageJstfMax; /* Offset to Shrinkage JstfMax table--
* from beginning of JstfPriority table
* --may be NULL */
OffsetTo<JstfModList>
extensionEnableGSUB; /* Offset to Extension Enable GSUB
* JstfModList table--from beginning of
* JstfPriority table--may be NULL */
OffsetTo<JstfModList>
extensionDisableGSUB; /* Offset to Extension Disable GSUB
* JstfModList table--from beginning of
* JstfPriority table--may be NULL */
OffsetTo<JstfModList>
extensionEnableGPOS; /* Offset to Extension Enable GPOS
* JstfModList table--from beginning of
* JstfPriority table--may be NULL */
OffsetTo<JstfModList>
extensionDisableGPOS; /* Offset to Extension Disable GPOS
* JstfModList table--from beginning of
* JstfPriority table--may be NULL */
OffsetTo<JstfMax>
extensionJstfMax; /* Offset to Extension JstfMax table--
* from beginning of JstfPriority table
* --may be NULL */
public:
DEFINE_SIZE_STATIC (20);
};
/*
* JstfLangSys -- Justification Language System Table
*/
struct JstfLangSys : OffsetListOf<JstfPriority>
{
bool sanitize (hb_sanitize_context_t *c,
const Record_sanitize_closure_t * = nullptr) const
{
TRACE_SANITIZE (this);
return_trace (OffsetListOf<JstfPriority>::sanitize (c));
}
};
/*
* ExtenderGlyphs -- Extender Glyph Table
*/
typedef SortedArrayOf<GlyphID> ExtenderGlyphs;
/*
* JstfScript -- The Justification Table
*/
struct JstfScript
{
unsigned int get_lang_sys_count () const
{ return langSys.len; }
const Tag& get_lang_sys_tag (unsigned int i) const
{ return langSys.get_tag (i); }
unsigned int get_lang_sys_tags (unsigned int start_offset,
unsigned int *lang_sys_count /* IN/OUT */,
hb_tag_t *lang_sys_tags /* OUT */) const
{ return langSys.get_tags (start_offset, lang_sys_count, lang_sys_tags); }
const JstfLangSys& get_lang_sys (unsigned int i) const
{
if (i == Index::NOT_FOUND_INDEX) return get_default_lang_sys ();
return this+langSys[i].offset;
}
bool find_lang_sys_index (hb_tag_t tag, unsigned int *index) const
{ return langSys.find_index (tag, index); }
bool has_default_lang_sys () const { return defaultLangSys != 0; }
const JstfLangSys& get_default_lang_sys () const { return this+defaultLangSys; }
bool sanitize (hb_sanitize_context_t *c,
const Record_sanitize_closure_t * = nullptr) const
{
TRACE_SANITIZE (this);
return_trace (extenderGlyphs.sanitize (c, this) &&
defaultLangSys.sanitize (c, this) &&
langSys.sanitize (c, this));
}
protected:
OffsetTo<ExtenderGlyphs>
extenderGlyphs; /* Offset to ExtenderGlyph table--from beginning
* of JstfScript table-may be NULL */
OffsetTo<JstfLangSys>
defaultLangSys; /* Offset to DefaultJstfLangSys table--from
* beginning of JstfScript table--may be Null */
RecordArrayOf<JstfLangSys>
langSys; /* Array of JstfLangSysRecords--listed
* alphabetically by LangSysTag */
public:
DEFINE_SIZE_ARRAY (6, langSys);
};
/*
* JSTF -- Justification
* https://docs.microsoft.com/en-us/typography/opentype/spec/jstf
*/
struct JSTF
{
enum { tableTag = HB_OT_TAG_JSTF };
unsigned int get_script_count () const
{ return scriptList.len; }
const Tag& get_script_tag (unsigned int i) const
{ return scriptList.get_tag (i); }
unsigned int get_script_tags (unsigned int start_offset,
unsigned int *script_count /* IN/OUT */,
hb_tag_t *script_tags /* OUT */) const
{ return scriptList.get_tags (start_offset, script_count, script_tags); }
const JstfScript& get_script (unsigned int i) const
{ return this+scriptList[i].offset; }
bool find_script_index (hb_tag_t tag, unsigned int *index) const
{ return scriptList.find_index (tag, index); }
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (version.sanitize (c) &&
likely (version.major == 1) &&
scriptList.sanitize (c, this));
}
protected:
FixedVersion<>version; /* Version of the JSTF table--initially set
* to 0x00010000u */
RecordArrayOf<JstfScript>
scriptList; /* Array of JstfScripts--listed
* alphabetically by ScriptTag */
public:
DEFINE_SIZE_ARRAY (6, scriptList);
};
} /* namespace OT */
#endif /* HB_OT_LAYOUT_JSTF_TABLE_HH */