/****************************************************************************
*
* cffparse.h
*
* CFF token stream parser (specification)
*
* Copyright (C) 1996-2023 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.
*
*/
#ifndef CFFPARSE_H_
#define CFFPARSE_H_
#include <freetype/internal/cfftypes.h>
#include <freetype/internal/ftobjs.h>
FT_BEGIN_HEADER
/* CFF uses constant parser stack size; */
/* CFF2 can increase from default 193 */
#define CFF_MAX_STACK_DEPTH 96
/*
* There are plans to remove the `maxstack' operator in a forthcoming
* revision of the CFF2 specification, increasing the (then static) stack
* size to 513. By making the default stack size equal to the maximum
* stack size, the operator is essentially disabled, which has the
* desired effect in FreeType.
*/
#define CFF2_MAX_STACK 513
#define CFF2_DEFAULT_STACK 513
#define CFF_CODE_TOPDICT 0x1000
#define CFF_CODE_PRIVATE 0x2000
#define CFF2_CODE_TOPDICT 0x3000
#define CFF2_CODE_FONTDICT 0x4000
#define CFF2_CODE_PRIVATE 0x5000
typedef struct CFF_ParserRec_
{
FT_Library library;
FT_Byte* start;
FT_Byte* limit;
FT_Byte* cursor;
FT_Byte** stack;
FT_Byte** top;
FT_UInt stackSize; /* allocated size */
#ifdef CFF_CONFIG_OPTION_OLD_ENGINE
FT_ListRec t2_strings;
#endif /* CFF_CONFIG_OPTION_OLD_ENGINE */
FT_UInt object_code;
void* object;
FT_UShort num_designs; /* a copy of `CFF_FontRecDict->num_designs' */
FT_UShort num_axes; /* a copy of `CFF_FontRecDict->num_axes' */
} CFF_ParserRec, *CFF_Parser;
FT_LOCAL( FT_Long )
cff_parse_num( CFF_Parser parser,
FT_Byte** d );
FT_LOCAL( FT_Error )
cff_parser_init( CFF_Parser parser,
FT_UInt code,
void* object,
FT_Library library,
FT_UInt stackSize,
FT_UShort num_designs,
FT_UShort num_axes );
FT_LOCAL( void )
cff_parser_done( CFF_Parser parser );
FT_LOCAL( FT_Error )
cff_parser_run( CFF_Parser parser,
FT_Byte* start,
FT_Byte* limit );
enum
{
cff_kind_none = 0,
cff_kind_num,
cff_kind_fixed,
cff_kind_fixed_thousand,
cff_kind_string,
cff_kind_bool,
cff_kind_delta,
cff_kind_callback,
cff_kind_blend,
cff_kind_max /* do not remove */
};
/* now generate handlers for the most simple fields */
typedef FT_Error (*CFF_Field_Reader)( CFF_Parser parser );
typedef struct CFF_Field_Handler_
{
int kind;
int code;
FT_UInt offset;
FT_Byte size;
CFF_Field_Reader reader;
FT_UInt array_max;
FT_UInt count_offset;
#ifdef FT_DEBUG_LEVEL_TRACE
const char* id;
#endif
} CFF_Field_Handler;
FT_END_HEADER
#ifdef CFF_CONFIG_OPTION_OLD_ENGINE
typedef struct CFF_T2_String_
{
FT_Byte* start;
FT_Byte* limit;
} CFF_T2_StringRec, *CFF_T2_String;
#endif /* CFF_CONFIG_OPTION_OLD_ENGINE */
#endif /* CFFPARSE_H_ */
/* END */
