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/*
* Copyright (C) 1998-2004 David Turner and Werner Lemberg
* Copyright (C) 2006 Behdad Esfahbod
*
* This is part of HarfBuzz, an OpenType Layout engine 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.
*/
#ifndef HARFBUZZ_GDEF_H
#define HARFBUZZ_GDEF_H
#include "harfbuzz-open.h"
#include "harfbuzz-stream.h"
HB_BEGIN_HEADER
#ifdef HB_USE_PACKED_STRUCTS
#pragma pack(push, 1)
#endif
/* GDEF glyph properties. Note that HB_GDEF_COMPONENT has no corresponding
* flag in the LookupFlag field. */
#define HB_GDEF_BASE_GLYPH 0x0002
#define HB_GDEF_LIGATURE 0x0004
#define HB_GDEF_MARK 0x0008
#define HB_GDEF_COMPONENT 0x0010
typedef struct HB_AttachPoint_ HB_AttachPoint;
struct HB_AttachList_
{
HB_AttachPoint* AttachPoint; /* array of AttachPoint tables */
HB_Coverage Coverage; /* Coverage table */
HB_UShort GlyphCount; /* number of glyphs with
attachments */
HB_Bool loaded;
};
typedef struct HB_AttachList_ HB_AttachList;
typedef struct HB_LigGlyph_ HB_LigGlyph;
struct HB_LigCaretList_
{
HB_LigGlyph* LigGlyph; /* array of LigGlyph tables */
HB_Coverage Coverage; /* Coverage table */
HB_UShort LigGlyphCount; /* number of ligature glyphs */
HB_Bool loaded;
};
typedef struct HB_LigCaretList_ HB_LigCaretList;
/* The `NewGlyphClasses' field is not defined in the TTO specification.
We use it for fonts with a constructed `GlyphClassDef' structure
(i.e., which don't have a GDEF table) to collect glyph classes
assigned during the lookup process. The number of arrays in this
pointer array is GlyphClassDef->cd.cd2.ClassRangeCount+1; the nth
array then contains the glyph class values of the glyphs not covered
by the ClassRangeRecords structures with index n-1 and n. We store
glyph class values for four glyphs in a single array element.
`LastGlyph' is identical to the number of glyphs minus one in the
font; we need it only if `NewGlyphClasses' is not NULL (to have an
upper bound for the last array).
Note that we first store the file offset to the `MarkAttachClassDef'
field (which has been introduced in OpenType 1.2) -- since the
`Version' field value hasn't been increased to indicate that we have
one more field for some obscure reason, we must parse the GSUB table
to find out whether class values refer to this table. Only then we
can finally load the MarkAttachClassDef structure if necessary. */
struct HB_GDEFHeader_
{
HB_UShort** NewGlyphClasses;
HB_UInt offset;
HB_UInt MarkAttachClassDef_offset;
HB_16Dot16 Version;
HB_ClassDefinition GlyphClassDef;
HB_AttachList AttachList;
HB_LigCaretList LigCaretList;
HB_ClassDefinition MarkAttachClassDef; /* new in OT 1.2 */
HB_UShort LastGlyph;
};
typedef struct HB_GDEFHeader_ HB_GDEFHeader;
typedef struct HB_GDEFHeader_* HB_GDEF;
HB_Error HB_New_GDEF_Table( HB_GDEFHeader** retptr );
HB_Error HB_Load_GDEF_Table( HB_Stream stream,
HB_GDEFHeader** gdef );
HB_Error HB_Done_GDEF_Table ( HB_GDEFHeader* gdef );
HB_Error HB_GDEF_Get_Glyph_Property( HB_GDEFHeader* gdef,
HB_UShort glyphID,
HB_UShort* property );
HB_Error HB_GDEF_Build_ClassDefinition( HB_GDEFHeader* gdef,
HB_UShort num_glyphs,
HB_UShort glyph_count,
HB_UShort* glyph_array,
HB_UShort* class_array );
#ifdef HB_USE_PACKED_STRUCTS
#pragma pack(pop)
#endif
HB_END_HEADER
#endif /* HARFBUZZ_GDEF_H */
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