236 lines
7.1 KiB
C++
236 lines
7.1 KiB
C++
/*
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* Copyright © 2013 Google, Inc.
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*
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* This is part of HarfBuzz, a text shaping library.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* Google Author(s): Behdad Esfahbod
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*/
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#ifndef HB_OT_LAYOUT_JSTF_TABLE_HH
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#define HB_OT_LAYOUT_JSTF_TABLE_HH
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#include "hb-open-type.hh"
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#include "hb-ot-layout-gpos-table.hh"
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namespace OT {
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/*
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* JstfModList -- Justification Modification List Tables
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*/
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typedef IndexArray JstfModList;
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/*
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* JstfMax -- Justification Maximum Table
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*/
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typedef List16OfOffset16To<PosLookup> JstfMax;
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/*
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* JstfPriority -- Justification Priority Table
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*/
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struct JstfPriority
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{
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bool sanitize (hb_sanitize_context_t *c) const
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{
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TRACE_SANITIZE (this);
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return_trace (c->check_struct (this) &&
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shrinkageEnableGSUB.sanitize (c, this) &&
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shrinkageDisableGSUB.sanitize (c, this) &&
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shrinkageEnableGPOS.sanitize (c, this) &&
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shrinkageDisableGPOS.sanitize (c, this) &&
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shrinkageJstfMax.sanitize (c, this) &&
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extensionEnableGSUB.sanitize (c, this) &&
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extensionDisableGSUB.sanitize (c, this) &&
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extensionEnableGPOS.sanitize (c, this) &&
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extensionDisableGPOS.sanitize (c, this) &&
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extensionJstfMax.sanitize (c, this));
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}
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protected:
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Offset16To<JstfModList>
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shrinkageEnableGSUB; /* Offset to Shrinkage Enable GSUB
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* JstfModList table--from beginning of
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* JstfPriority table--may be NULL */
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Offset16To<JstfModList>
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shrinkageDisableGSUB; /* Offset to Shrinkage Disable GSUB
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* JstfModList table--from beginning of
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* JstfPriority table--may be NULL */
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Offset16To<JstfModList>
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shrinkageEnableGPOS; /* Offset to Shrinkage Enable GPOS
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* JstfModList table--from beginning of
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* JstfPriority table--may be NULL */
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Offset16To<JstfModList>
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shrinkageDisableGPOS; /* Offset to Shrinkage Disable GPOS
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* JstfModList table--from beginning of
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* JstfPriority table--may be NULL */
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Offset16To<JstfMax>
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shrinkageJstfMax; /* Offset to Shrinkage JstfMax table--
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* from beginning of JstfPriority table
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* --may be NULL */
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Offset16To<JstfModList>
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extensionEnableGSUB; /* Offset to Extension Enable GSUB
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* JstfModList table--from beginning of
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* JstfPriority table--may be NULL */
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Offset16To<JstfModList>
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extensionDisableGSUB; /* Offset to Extension Disable GSUB
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* JstfModList table--from beginning of
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* JstfPriority table--may be NULL */
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Offset16To<JstfModList>
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extensionEnableGPOS; /* Offset to Extension Enable GPOS
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* JstfModList table--from beginning of
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* JstfPriority table--may be NULL */
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Offset16To<JstfModList>
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extensionDisableGPOS; /* Offset to Extension Disable GPOS
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* JstfModList table--from beginning of
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* JstfPriority table--may be NULL */
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Offset16To<JstfMax>
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extensionJstfMax; /* Offset to Extension JstfMax table--
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* from beginning of JstfPriority table
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* --may be NULL */
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public:
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DEFINE_SIZE_STATIC (20);
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};
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/*
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* JstfLangSys -- Justification Language System Table
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*/
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struct JstfLangSys : List16OfOffset16To<JstfPriority>
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{
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bool sanitize (hb_sanitize_context_t *c,
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const Record_sanitize_closure_t * = nullptr) const
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{
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TRACE_SANITIZE (this);
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return_trace (List16OfOffset16To<JstfPriority>::sanitize (c));
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}
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};
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/*
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* ExtenderGlyphs -- Extender Glyph Table
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*/
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typedef SortedArray16Of<HBGlyphID16> ExtenderGlyphs;
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/*
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* JstfScript -- The Justification Table
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*/
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struct JstfScript
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{
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unsigned int get_lang_sys_count () const
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{ return langSys.len; }
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const Tag& get_lang_sys_tag (unsigned int i) const
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{ return langSys.get_tag (i); }
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unsigned int get_lang_sys_tags (unsigned int start_offset,
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unsigned int *lang_sys_count /* IN/OUT */,
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hb_tag_t *lang_sys_tags /* OUT */) const
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{ return langSys.get_tags (start_offset, lang_sys_count, lang_sys_tags); }
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const JstfLangSys& get_lang_sys (unsigned int i) const
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{
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if (i == Index::NOT_FOUND_INDEX) return get_default_lang_sys ();
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return this+langSys[i].offset;
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}
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bool find_lang_sys_index (hb_tag_t tag, unsigned int *index) const
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{ return langSys.find_index (tag, index); }
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bool has_default_lang_sys () const { return defaultLangSys != 0; }
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const JstfLangSys& get_default_lang_sys () const { return this+defaultLangSys; }
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bool sanitize (hb_sanitize_context_t *c,
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const Record_sanitize_closure_t * = nullptr) const
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{
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TRACE_SANITIZE (this);
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return_trace (extenderGlyphs.sanitize (c, this) &&
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defaultLangSys.sanitize (c, this) &&
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langSys.sanitize (c, this));
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}
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protected:
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Offset16To<ExtenderGlyphs>
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extenderGlyphs; /* Offset to ExtenderGlyph table--from beginning
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* of JstfScript table-may be NULL */
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Offset16To<JstfLangSys>
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defaultLangSys; /* Offset to DefaultJstfLangSys table--from
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* beginning of JstfScript table--may be Null */
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RecordArrayOf<JstfLangSys>
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langSys; /* Array of JstfLangSysRecords--listed
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* alphabetically by LangSysTag */
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public:
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DEFINE_SIZE_ARRAY (6, langSys);
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};
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/*
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* JSTF -- Justification
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* https://docs.microsoft.com/en-us/typography/opentype/spec/jstf
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*/
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struct JSTF
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{
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static constexpr hb_tag_t tableTag = HB_OT_TAG_JSTF;
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unsigned int get_script_count () const
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{ return scriptList.len; }
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const Tag& get_script_tag (unsigned int i) const
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{ return scriptList.get_tag (i); }
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unsigned int get_script_tags (unsigned int start_offset,
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unsigned int *script_count /* IN/OUT */,
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hb_tag_t *script_tags /* OUT */) const
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{ return scriptList.get_tags (start_offset, script_count, script_tags); }
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const JstfScript& get_script (unsigned int i) const
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{ return this+scriptList[i].offset; }
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bool find_script_index (hb_tag_t tag, unsigned int *index) const
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{ return scriptList.find_index (tag, index); }
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bool sanitize (hb_sanitize_context_t *c) const
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{
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TRACE_SANITIZE (this);
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return_trace (version.sanitize (c) &&
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likely (version.major == 1) &&
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scriptList.sanitize (c, this));
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}
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protected:
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FixedVersion<>version; /* Version of the JSTF table--initially set
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* to 0x00010000u */
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RecordArrayOf<JstfScript>
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scriptList; /* Array of JstfScripts--listed
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* alphabetically by ScriptTag */
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public:
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DEFINE_SIZE_ARRAY (6, scriptList);
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};
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} /* namespace OT */
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#endif /* HB_OT_LAYOUT_JSTF_TABLE_HH */
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