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/*******************************************************************
*
* ftxopen.h
*
* TrueType Open support.
*
* Copyright 1996-2000 by
* David Turner, Robert Wilhelm, and Werner Lemberg.
*
* This file is part of the FreeType project, and may only be used
* modified and distributed under the terms of the FreeType project
* license, LICENSE.TXT. By continuing to use, modify, or distribute
* this file you indicate that you have read the license and
* understand and accept it fully.
*
* This file should be included by the application. Nevertheless,
* the table specific APIs (and structures) are located in files like
* ftxgsub.h or ftxgpos.h; these header files are read by ftxopen.h .
*
******************************************************************/
#ifndef FTXOPEN_H
#define FTXOPEN_H
#include "freetype.h"
#ifdef __cplusplus
extern "C" {
#endif
#define TTO_MAX_NESTING_LEVEL 100
#define TTO_Err_Invalid_SubTable_Format 0x1000
#define TTO_Err_Invalid_SubTable 0x1001
#define TTO_Err_Not_Covered 0x1002
#define TTO_Err_Too_Many_Nested_Contexts 0x1003
#define TTO_Err_No_MM_Interpreter 0x1004
/* Script list related structures */
struct TTO_LangSys_
{
TT_UShort LookupOrderOffset; /* always 0 for TT Open 1.0 */
TT_UShort ReqFeatureIndex; /* required FeatureIndex */
TT_UShort FeatureCount; /* number of Feature indices */
TT_UShort* FeatureIndex; /* array of Feature indices */
};
typedef struct TTO_LangSys_ TTO_LangSys;
struct TTO_LangSysRecord_
{
TT_ULong LangSysTag; /* LangSysTag identifier */
TTO_LangSys LangSys; /* LangSys table */
};
typedef struct TTO_LangSysRecord_ TTO_LangSysRecord;
struct TTO_Script_
{
TTO_LangSys DefaultLangSys; /* DefaultLangSys table */
TT_UShort LangSysCount; /* number of LangSysRecords */
TTO_LangSysRecord* LangSysRecord; /* array of LangSysRecords */
};
typedef struct TTO_Script_ TTO_Script;
struct TTO_ScriptRecord_
{
TT_ULong ScriptTag; /* ScriptTag identifier */
TTO_Script Script; /* Script table */
};
typedef struct TTO_ScriptRecord_ TTO_ScriptRecord;
struct TTO_ScriptList_
{
TT_UShort ScriptCount; /* number of ScriptRecords */
TTO_ScriptRecord* ScriptRecord; /* array of ScriptRecords */
};
typedef struct TTO_ScriptList_ TTO_ScriptList;
/* Feature list related structures */
struct TTO_Feature_
{
TT_UShort FeatureParams; /* always 0 for TT Open 1.0 */
TT_UShort LookupListCount; /* number of LookupList indices */
TT_UShort* LookupListIndex; /* array of LookupList indices */
};
typedef struct TTO_Feature_ TTO_Feature;
struct TTO_FeatureRecord_
{
TT_ULong FeatureTag; /* FeatureTag identifier */
TTO_Feature Feature; /* Feature table */
};
typedef struct TTO_FeatureRecord_ TTO_FeatureRecord;
struct TTO_FeatureList_
{
TT_UShort FeatureCount; /* number of FeatureRecords */
TTO_FeatureRecord* FeatureRecord; /* array of FeatureRecords */
};
typedef struct TTO_FeatureList_ TTO_FeatureList;
/* Lookup list related structures */
struct TTO_SubTable_; /* defined below after inclusion
of ftxgsub.h and ftxgpos.h */
typedef struct TTO_SubTable_ TTO_SubTable;
struct TTO_Lookup_
{
TT_UShort LookupType; /* Lookup type */
TT_UShort LookupFlag; /* Lookup qualifiers */
TT_UShort SubTableCount; /* number of SubTables */
TTO_SubTable* SubTable; /* array of SubTables */
};
typedef struct TTO_Lookup_ TTO_Lookup;
/* The `Properties' field is not defined in the TTO specification but
is needed for processing lookups. If properties[n] is > 0, the
functions TT_GSUB_Apply_String() resp. TT_GPOS_Apply_String() will
process Lookup[n] for glyphs which have the specific bit not set in
the `properties' field of the input string object. */
struct TTO_LookupList_
{
TT_UShort LookupCount; /* number of Lookups */
TTO_Lookup* Lookup; /* array of Lookup records */
TT_UShort* Properties; /* array of flags */
};
typedef struct TTO_LookupList_ TTO_LookupList;
/* Possible LookupFlag bit masks. `IGNORE_SPECIAL_MARKS' comes from the
OpenType 1.2 specification. */
#define IGNORE_BASE_GLYPHS 0x0002
#define IGNORE_LIGATURES 0x0004
#define IGNORE_MARKS 0x0008
#define IGNORE_SPECIAL_MARKS 0xFF00
struct TTO_CoverageFormat1_
{
TT_UShort GlyphCount; /* number of glyphs in GlyphArray */
TT_UShort* GlyphArray; /* array of glyph IDs */
};
typedef struct TTO_CoverageFormat1_ TTO_CoverageFormat1;
struct TTO_RangeRecord_
{
TT_UShort Start; /* first glyph ID in the range */
TT_UShort End; /* last glyph ID in the range */
TT_UShort StartCoverageIndex; /* coverage index of first
glyph ID in the range */
};
typedef struct TTO_RangeRecord_ TTO_RangeRecord;
struct TTO_CoverageFormat2_
{
TT_UShort RangeCount; /* number of RangeRecords */
TTO_RangeRecord* RangeRecord; /* array of RangeRecords */
};
typedef struct TTO_CoverageFormat2_ TTO_CoverageFormat2;
struct TTO_Coverage_
{
TT_UShort CoverageFormat; /* 1 or 2 */
union
{
TTO_CoverageFormat1 cf1;
TTO_CoverageFormat2 cf2;
} cf;
};
typedef struct TTO_Coverage_ TTO_Coverage;
struct TTO_ClassDefFormat1_
{
TT_UShort StartGlyph; /* first glyph ID of the
ClassValueArray */
TT_UShort GlyphCount; /* size of the ClassValueArray */
TT_UShort* ClassValueArray; /* array of class values */
};
typedef struct TTO_ClassDefFormat1_ TTO_ClassDefFormat1;
struct TTO_ClassRangeRecord_
{
TT_UShort Start; /* first glyph ID in the range */
TT_UShort End; /* last glyph ID in the range */
TT_UShort Class; /* applied to all glyphs in range */
};
typedef struct TTO_ClassRangeRecord_ TTO_ClassRangeRecord;
struct TTO_ClassDefFormat2_
{
TT_UShort ClassRangeCount;
/* number of ClassRangeRecords */
TTO_ClassRangeRecord* ClassRangeRecord;
/* array of ClassRangeRecords */
};
typedef struct TTO_ClassDefFormat2_ TTO_ClassDefFormat2;
/* The `Defined' field is not defined in the TTO specification but
apparently needed for processing fonts like trado.ttf: This font
refers to a class which contains not a single element. We map such
classes to class 0. */
struct TTO_ClassDefinition_
{
TT_Bool loaded;
TT_Bool* Defined; /* array of Booleans.
If Defined[n] is FALSE,
class n contains no glyphs. */
TT_UShort ClassFormat; /* 1 or 2 */
union
{
TTO_ClassDefFormat1 cd1;
TTO_ClassDefFormat2 cd2;
} cd;
};
typedef struct TTO_ClassDefinition_ TTO_ClassDefinition;
struct TTO_Device_
{
TT_UShort StartSize; /* smallest size to correct */
TT_UShort EndSize; /* largest size to correct */
TT_UShort DeltaFormat; /* DeltaValue array data format:
1, 2, or 3 */
TT_UShort* DeltaValue; /* array of compressed data */
};
typedef struct TTO_Device_ TTO_Device;
#include "ftxgdef.h"
#include "ftxgsub.h"
#include "ftxgpos.h"
struct TTO_SubTable_
{
union
{
TTO_GSUB_SubTable gsub;
TTO_GPOS_SubTable gpos;
} st;
};
enum TTO_Type_
{
GSUB,
GPOS
};
typedef enum TTO_Type_ TTO_Type;
#ifdef __cplusplus
}
#endif
#endif /* FTXOPEN_H */
/* END */
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