src/hb-ot-layout-jstf-table.hh - third_party/harfbuzz - Git at Google

 /*
  * 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 List16OfOffset16To<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:
   Offset16To<JstfModList>
 		shrinkageEnableGSUB;	/* Offset to Shrinkage Enable GSUB
 					 * JstfModList table--from beginning of
 					 * JstfPriority table--may be NULL */
   Offset16To<JstfModList>
 		shrinkageDisableGSUB;	/* Offset to Shrinkage Disable GSUB
 					 * JstfModList table--from beginning of
 					 * JstfPriority table--may be NULL */
   Offset16To<JstfModList>
 		shrinkageEnableGPOS;	/* Offset to Shrinkage Enable GPOS
 					 * JstfModList table--from beginning of
 					 * JstfPriority table--may be NULL */
   Offset16To<JstfModList>
 		shrinkageDisableGPOS;	/* Offset to Shrinkage Disable GPOS
 					 * JstfModList table--from beginning of
 					 * JstfPriority table--may be NULL */
   Offset16To<JstfMax>
 		shrinkageJstfMax;	/* Offset to Shrinkage JstfMax table--
 					 * from beginning of JstfPriority table
 					 * --may be NULL */
   Offset16To<JstfModList>
 		extensionEnableGSUB;	/* Offset to Extension Enable GSUB
 					 * JstfModList table--from beginning of
 					 * JstfPriority table--may be NULL */
   Offset16To<JstfModList>
 		extensionDisableGSUB;	/* Offset to Extension Disable GSUB
 					 * JstfModList table--from beginning of
 					 * JstfPriority table--may be NULL */
   Offset16To<JstfModList>
 		extensionEnableGPOS;	/* Offset to Extension Enable GPOS
 					 * JstfModList table--from beginning of
 					 * JstfPriority table--may be NULL */
   Offset16To<JstfModList>
 		extensionDisableGPOS;	/* Offset to Extension Disable GPOS
 					 * JstfModList table--from beginning of
 					 * JstfPriority table--may be NULL */
   Offset16To<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 : List16OfOffset16To<JstfPriority>
 {
   bool sanitize (hb_sanitize_context_t *c,
 		 const Record_sanitize_closure_t * = nullptr) const
   {
     TRACE_SANITIZE (this);
     return_trace (List16OfOffset16To<JstfPriority>::sanitize (c));
   }
 };


 /*
  * ExtenderGlyphs -- Extender Glyph Table
  */

 typedef SortedArray16Of<HBGlyphID16> 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:
   Offset16To<ExtenderGlyphs>
 		extenderGlyphs;	/* Offset to ExtenderGlyph table--from beginning
 				 * of JstfScript table-may be NULL */
   Offset16To<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
 {
   static constexpr hb_tag_t 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 */
	/*
	* 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 List16OfOffset16To<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:
	Offset16To<JstfModList>
	shrinkageEnableGSUB; /* Offset to Shrinkage Enable GSUB
	* JstfModList table--from beginning of
	* JstfPriority table--may be NULL */
	Offset16To<JstfModList>
	shrinkageDisableGSUB; /* Offset to Shrinkage Disable GSUB
	* JstfModList table--from beginning of
	* JstfPriority table--may be NULL */
	Offset16To<JstfModList>
	shrinkageEnableGPOS; /* Offset to Shrinkage Enable GPOS
	* JstfModList table--from beginning of
	* JstfPriority table--may be NULL */
	Offset16To<JstfModList>
	shrinkageDisableGPOS; /* Offset to Shrinkage Disable GPOS
	* JstfModList table--from beginning of
	* JstfPriority table--may be NULL */
	Offset16To<JstfMax>
	shrinkageJstfMax; /* Offset to Shrinkage JstfMax table--
	* from beginning of JstfPriority table
	* --may be NULL */
	Offset16To<JstfModList>
	extensionEnableGSUB; /* Offset to Extension Enable GSUB
	* JstfModList table--from beginning of
	* JstfPriority table--may be NULL */
	Offset16To<JstfModList>
	extensionDisableGSUB; /* Offset to Extension Disable GSUB
	* JstfModList table--from beginning of
	* JstfPriority table--may be NULL */
	Offset16To<JstfModList>
	extensionEnableGPOS; /* Offset to Extension Enable GPOS
	* JstfModList table--from beginning of
	* JstfPriority table--may be NULL */
	Offset16To<JstfModList>
	extensionDisableGPOS; /* Offset to Extension Disable GPOS
	* JstfModList table--from beginning of
	* JstfPriority table--may be NULL */
	Offset16To<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 : List16OfOffset16To<JstfPriority>
	{
	bool sanitize (hb_sanitize_context_t *c,
	const Record_sanitize_closure_t * = nullptr) const
	{
	TRACE_SANITIZE (this);
	return_trace (List16OfOffset16To<JstfPriority>::sanitize (c));
	}
	};


	/*
	* ExtenderGlyphs -- Extender Glyph Table
	*/

	typedef SortedArray16Of<HBGlyphID16> 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:
	Offset16To<ExtenderGlyphs>
	extenderGlyphs; /* Offset to ExtenderGlyph table--from beginning
	* of JstfScript table-may be NULL */
	Offset16To<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
	{
	static constexpr hb_tag_t 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 */