ref: 91e52d416aedfdfcf5b4331c2156a3866898738e
dir: /src/cid/cidparse.h/
/*******************************************************************
*
* cidparse.h 2.0
*
* CID-Keyed Type1 parser.
*
* Copyright 1996-1998 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.
*
* The Type 1 parser is in charge of the following:
*
* - provide an implementation of a growing sequence of
* objects called a T1_Table (used to build various tables
* needed by the loader).
*
* - opening .pfb and .pfa files to extract their top-level
* and private dictionaries
*
* - read numbers, arrays & strings from any dictionary
*
* See "t1load.c" to see how data is loaded from the font file
*
******************************************************************/
#ifndef CIDPARSE_H
#define CIDPARSE_H
#include <freetype/internal/t1types.h>
#ifdef __cplusplus
extern "C" {
#endif
#if 0
/*************************************************************************
*
* <Struct> T1_Table
*
* <Description>
* A T1_Table is a simple object used to store an array of objects
* in a single memory block.
*
* <Fields>
* block :: address in memory of the growheap's block. This
* can change between two object adds, due to the use
* of 'realloc'.
*
* cursor :: current top of the grow heap within its block
*
* capacity :: current size of the heap block. Increments by 1 Kb
*
* init :: boolean. set when the table has been initialized
* (the table user should set this field)
*
* max_elems :: maximum number of elements in table
* num_elems :: current number of elements in table
*
* elements :: table of element addresses within the block
* lengths :: table of element sizes within the block
*
* memory :: memory object used for memory operations (alloc/realloc)
*/
typedef struct T1_Table_
{
FT_Byte* block; /* current memory block */
FT_Int cursor; /* current cursor in memory block */
FT_Int capacity; /* current size of memory block */
FT_Long init;
FT_Int max_elems;
FT_Int num_elems;
FT_Byte** elements; /* addresses of table elements */
FT_Int* lengths; /* lengths of table elements */
FT_Memory memory;
} T1_Table;
LOCAL_DEF
FT_Error T1_New_Table( T1_Table* table,
FT_Int count,
FT_Memory memory );
LOCAL_DEF
FT_Error T1_Add_Table( T1_Table* table,
FT_Int index,
void* object,
FT_Int length );
LOCAL_DEF
void T1_Release_Table( T1_Table* table );
#endif
/*************************************************************************
*
* <Struct> CID_Parser
*
* <Description>
* A CID_Parser is an object used to parse a Type 1 fonts very
* quickly.
*
* <Fields>
* stream :: current input stream
* memory :: current memory object
*
* base_dict :: pointer to top-level dictionary
* base_len :: length in bytes of top dict
*
* private_dict :: pointer to private dictionary
* private_len :: length in bytes of private dict
*
* in_pfb :: boolean. Indicates that we're in a .pfb file
* in_memory :: boolean. Indicates a memory-based stream
* single_block :: boolean. Indicates that the private dict
* is stored in lieu of the base dict
*
* cursor :: current parser cursor
* limit :: current parser limit (first byte after current
* dictionary).
*
* error :: current parsing error
*/
typedef struct CID_Parser_
{
FT_Stream stream;
FT_Memory memory;
FT_Byte* postscript;
FT_Int postscript_len;
FT_ULong data_offset;
FT_Byte* cursor;
FT_Byte* limit;
FT_Error error;
CID_Info* cid;
FT_Int num_dict;
} CID_Parser;
LOCAL_DEF
FT_Error CID_New_Parser( CID_Parser* parser,
FT_Stream stream,
FT_Memory memory );
LOCAL_DEF
void CID_Done_Parser( CID_Parser* parser );
/*************************************************************************
*
* PARSING ROUTINES
*
*************************************************************************/
LOCAL_DEF
FT_Long CID_ToInt ( CID_Parser* parser );
LOCAL_DEF
FT_Int CID_ToCoordArray( CID_Parser* parser,
FT_Int max_coords,
FT_Short* coords );
LOCAL_DEF
FT_Int CID_ToFixedArray( CID_Parser* parser,
FT_Int max_values,
T1_Fixed* values,
FT_Int power_ten );
LOCAL_DEF
void CID_Skip_Spaces( CID_Parser* parser );
/* simple enumeration type used to identify token types */
typedef enum T1_Token_Type_
{
t1_token_none = 0,
t1_token_any,
t1_token_string,
t1_token_array,
/* do not remove */
t1_token_max
} T1_Token_Type;
/* a simple structure used to identify tokens */
typedef struct T1_Token_Rec_
{
FT_Byte* start; /* first character of token in input stream */
FT_Byte* limit; /* first character after the token */
T1_Token_Type type; /* type of token.. */
} T1_Token_Rec;
LOCAL_DEF
void CID_ToToken( CID_Parser* parser,
T1_Token_Rec* token );
/* enumeration type used to identify object fields */
typedef enum T1_Field_Type_
{
t1_field_none = 0,
t1_field_bool,
t1_field_integer,
t1_field_fixed,
t1_field_string,
t1_field_integer_array,
t1_field_fixed_array,
t1_field_callback,
/* do not remove */
t1_field_max
} T1_Field_Type;
typedef enum T1_Field_Location_
{
t1_field_cid_info,
t1_field_font_dict,
t1_field_font_info,
t1_field_private,
/* do not remove */
t1_field_location_max
} T1_Field_Location;
typedef FT_Error (*CID_Field_Parser)( CID_Face face,
CID_Parser* parser );
/* structure type used to model object fields */
typedef struct T1_Field_Rec_
{
const char* ident; /* field identifier */
T1_Field_Location location;
T1_Field_Type type; /* type of field */
CID_Field_Parser reader;
T1_UInt offset; /* offset of field in object */
FT_UInt size; /* size of field in bytes */
FT_UInt array_max; /* maximum number of elements for array */
FT_UInt count_offset; /* offset of element count for arrays */
} T1_Field_Rec;
#define T1_FIELD_REF(s,f) (((s*)0)->f)
#define T1_NEW_SIMPLE_FIELD( _ident, _type, _fname ) \
{ _ident, T1CODE, _type, \
0, \
(FT_UInt)(char*)&T1_FIELD_REF(T1TYPE,_fname), \
sizeof(T1_FIELD_REF(T1TYPE,_fname)), \
0, 0 },
#define T1_NEW_CALLBACK_FIELD( _ident, _reader ) \
{ _ident, T1CODE, t1_field_callback, \
_reader, \
0, 0, 0, 0 },
#define T1_NEW_TABLE_FIELD( _ident, _type, _fname, _max ) \
{ _ident, T1CODE, _type, \
0, \
(FT_UInt)(char*)&T1_FIELD_REF(T1TYPE,_fname), \
sizeof(T1_FIELD_REF(T1TYPE,_fname)[0]), \
_max, \
(FT_UInt)(char*)&T1_FIELD_REF(T1TYPE,num_ ## _fname) },
#define T1_NEW_TABLE_FIELD2( _ident, _type, _fname, _max ) \
{ _ident, T1CODE, _type, \
0, \
(FT_UInt)(char*)&T1_FIELD_REF(T1TYPE,_fname), \
sizeof(T1_FIELD_REF(T1TYPE,_fname)[0]), \
_max, 0 },
#define T1_FIELD_BOOL( _ident, _fname ) \
T1_NEW_SIMPLE_FIELD( _ident, t1_field_bool, _fname )
#define T1_FIELD_NUM( _ident, _fname ) \
T1_NEW_SIMPLE_FIELD( _ident, t1_field_integer, _fname )
#define T1_FIELD_FIXED( _ident, _fname ) \
T1_NEW_SIMPLE_FIELD( _ident, t1_field_fixed, _fname )
#define T1_FIELD_STRING( _ident, _fname ) \
T1_NEW_SIMPLE_FIELD( _ident, t1_field_string, _fname )
#define T1_FIELD_NUM_TABLE( _ident, _fname, _fmax ) \
T1_NEW_TABLE_FIELD( _ident, t1_field_integer_array, _fname, _fmax )
#define T1_FIELD_FIXED_TABLE( _ident, _fname, _fmax ) \
T1_NEW_TABLE_FIELD( _ident, t1_field_fixed_array, _fname, _fmax )
#define T1_FIELD_NUM_TABLE2( _ident, _fname, _fmax ) \
T1_NEW_TABLE_FIELD2( _ident, t1_field_integer_array, _fname, _fmax )
#define T1_FIELD_FIXED_TABLE2( _ident, _fname, _fmax ) \
T1_NEW_TABLE_FIELD2( _ident, t1_field_fixed_array, _fname, _fmax )
#define T1_FIELD_CALLBACK( _ident, _name ) \
T1_NEW_CALLBACK_FIELD( _ident, parse_ ## _name )
LOCAL_DEF
FT_Error CID_Load_Field( CID_Parser* parser,
const T1_Field_Rec* field,
void* object );
LOCAL_DEF
FT_Error CID_Load_Field_Table( CID_Parser* parser,
const T1_Field_Rec* field,
void* object );
#ifdef __cplusplus
}
#endif
#endif /* CIDPARSE_H */
/* END */