137 lines
3.8 KiB
C
137 lines
3.8 KiB
C
/***************************************************************************/
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/* */
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/* cffparse.h */
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/* */
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/* CFF token stream parser (specification) */
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/* */
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/* Copyright 1996-2017 by */
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/* David Turner, Robert Wilhelm, and Werner Lemberg. */
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/* */
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/* This file is part of the FreeType project, and may only be used, */
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/* modified, and distributed under the terms of the FreeType project */
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/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
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/* this file you indicate that you have read the license and */
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/* understand and accept it fully. */
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/* */
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/***************************************************************************/
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#ifndef CFFPARSE_H_
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#define CFFPARSE_H_
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#include <ft2build.h>
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#include "cfftypes.h"
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#include FT_INTERNAL_OBJECTS_H
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FT_BEGIN_HEADER
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/* CFF uses constant parser stack size; */
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/* CFF2 can increase from default 193 */
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#define CFF_MAX_STACK_DEPTH 96
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/*
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* There are plans to remove the `maxstack' operator in a forthcoming
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* revision of the CFF2 specification, increasing the (then static) stack
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* size to 513. By making the default stack size equal to the maximum
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* stack size, the operator is essentially disabled, which has the
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* desired effect in FreeType.
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*/
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#define CFF2_MAX_STACK 513
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#define CFF2_DEFAULT_STACK 513
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#define CFF_CODE_TOPDICT 0x1000
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#define CFF_CODE_PRIVATE 0x2000
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#define CFF2_CODE_TOPDICT 0x3000
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#define CFF2_CODE_FONTDICT 0x4000
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#define CFF2_CODE_PRIVATE 0x5000
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typedef struct CFF_ParserRec_
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{
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FT_Library library;
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FT_Byte* start;
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FT_Byte* limit;
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FT_Byte* cursor;
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FT_Byte** stack;
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FT_Byte** top;
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FT_UInt stackSize; /* allocated size */
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FT_UInt object_code;
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void* object;
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FT_UShort num_designs; /* a copy of `CFF_FontRecDict->num_designs' */
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FT_UShort num_axes; /* a copy of `CFF_FontRecDict->num_axes' */
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} CFF_ParserRec, *CFF_Parser;
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FT_LOCAL( FT_Long )
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cff_parse_num( CFF_Parser parser,
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FT_Byte** d );
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FT_LOCAL( FT_Error )
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cff_parser_init( CFF_Parser parser,
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FT_UInt code,
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void* object,
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FT_Library library,
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FT_UInt stackSize,
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FT_UShort num_designs,
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FT_UShort num_axes );
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FT_LOCAL( void )
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cff_parser_done( CFF_Parser parser );
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FT_LOCAL( FT_Error )
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cff_parser_run( CFF_Parser parser,
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FT_Byte* start,
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FT_Byte* limit );
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enum
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{
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cff_kind_none = 0,
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cff_kind_num,
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cff_kind_fixed,
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cff_kind_fixed_thousand,
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cff_kind_string,
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cff_kind_bool,
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cff_kind_delta,
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cff_kind_callback,
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cff_kind_blend,
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cff_kind_max /* do not remove */
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};
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/* now generate handlers for the most simple fields */
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typedef FT_Error (*CFF_Field_Reader)( CFF_Parser parser );
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typedef struct CFF_Field_Handler_
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{
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int kind;
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int code;
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FT_UInt offset;
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FT_Byte size;
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CFF_Field_Reader reader;
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FT_UInt array_max;
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FT_UInt count_offset;
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#ifdef FT_DEBUG_LEVEL_TRACE
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const char* id;
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#endif
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} CFF_Field_Handler;
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FT_END_HEADER
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#endif /* CFFPARSE_H_ */
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/* END */
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