ref: 920d41e038d5f8befa4d1572ee95cb4473191ff8
dir: /src/type1z/t1parse.h/
/*******************************************************************
*
* t1parse.h 2.0
*
* 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 T1PARSE_H
#define T1PARSE_H
#include <freetype/internal/t1types.h>
#ifdef __cplusplus
extern "C" {
#endif
/* 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_
{
T1_Byte* start; /* first character of token in input stream */
T1_Byte* limit; /* first character after the token */
T1_Token_Type type; /* type of token.. */
} T1_Token_Rec;
/* 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,
/* do not remove */
t1_field_max
} T1_Field_Type;
/* structure type used to model object fields */
typedef struct T1_Field_Rec_
{
T1_Field_Type type; /* type of field */
T1_UInt offset; /* offset of field in object */
T1_UInt size; /* size of field in bytes */
T1_UInt array_max; /* maximum number of elements for array */
T1_UInt count_offset; /* offset of element count for arrays */
T1_Int flag_bit; /* bit number for field flag */
} T1_Field_Rec;
#define T1_FIELD_REF(s,f) (((s*)0)->f)
#define T1_FIELD_BOOL( _ftype, _fname ) \
{ t1_field_bool, \
(T1_UInt)(char*)&T1_FIELD_REF(_ftype,_fname), \
sizeof(T1_FIELD_REF(_ftype,_fname)), \
0, 0, 0 }
#define T1_FIELD_NUM( _ftype, _fname ) \
{ t1_field_integer, \
(T1_UInt)(char*)&T1_FIELD_REF(_ftype,_fname), \
sizeof(T1_FIELD_REF(_ftype,_fname)), \
0, 0, 0 }
#define T1_FIELD_FIXED( _ftype, _fname, _power ) \
{ t1_field_fixed, \
(T1_UInt)(char*)&T1_FIELD_REF(_ftype,_fname), \
sizeof(T1_FIELD_REF(_ftype,_fname)), \
0, 0, 0 }
#define T1_FIELD_STRING( _ftype, _fname ) \
{ t1_field_string, \
(T1_UInt)(char*)&T1_FIELD_REF(_ftype,_fname), \
sizeof(T1_FIELD_REF(_ftype,_fname)), \
0, 0, 0 }
#define T1_FIELD_NUM_ARRAY( _ftype, _fname, _fcount, _fmax ) \
{ t1_field_integer, \
(T1_UInt)(char*)&T1_FIELD_REF(_ftype,_fname), \
sizeof(T1_FIELD_REF(_ftype,_fname)[0]), \
_fmax, \
(T1_UInt)(char*)&T1_FIELD_REF(_ftype,_fcount), \
0 }
#define T1_FIELD_FIXED_ARRAY( _ftype, _fname, _fcount, _fmax ) \
{ t1_field_fixed, \
(T1_UInt)(char*)&T1_FIELD_REF(_ftype,_fname), \
sizeof(T1_FIELD_REF(_ftype,_fname)[0]), \
_fmax, \
(T1_UInt)(char*)&T1_FIELD_REF(_ftype,_fcount), \
0 }
#define T1_FIELD_NUM_ARRAY2( _ftype, _fname, _fmax ) \
{ t1_field_integer, \
(T1_UInt)(char*)&T1_FIELD_REF(_ftype,_fname), \
sizeof(T1_FIELD_REF(_ftype,_fname)[0]), \
_fmax, \
0, 0 }
#define T1_FIELD_FIXED_ARRAY2( _ftype, _fname, _fmax ) \
{ t1_field_fixed, \
(T1_UInt)(char*)&T1_FIELD_REF(_ftype,_fname), \
sizeof(T1_FIELD_REF(_ftype,_fname)[0]), \
_fmax, \
0, 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_
{
T1_Byte* block; /* current memory block */
T1_Int cursor; /* current cursor in memory block */
T1_Int capacity; /* current size of memory block */
T1_Long init;
T1_Int max_elems;
T1_Int num_elems;
T1_Byte** elements; /* addresses of table elements */
T1_Int* lengths; /* lengths of table elements */
FT_Memory memory;
} T1_Table;
/*************************************************************************
*
* <Struct> T1_Parser
*
* <Description>
* A T1_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 T1_Parser_
{
FT_Stream stream;
FT_Memory memory;
T1_Byte* base_dict;
T1_Int base_len;
T1_Byte* private_dict;
T1_Int private_len;
T1_Byte in_pfb;
T1_Byte in_memory;
T1_Byte single_block;
T1_Byte* cursor;
T1_Byte* limit;
T1_Error error;
} T1_Parser;
LOCAL_DEF
T1_Error T1_New_Table( T1_Table* table,
T1_Int count,
FT_Memory memory );
LOCAL_DEF
T1_Error T1_Add_Table( T1_Table* table,
T1_Int index,
void* object,
T1_Int length );
#if 0
LOCAL_DEF
void T1_Done_Table( T1_Table* table );
#endif
LOCAL_DEF
void T1_Release_Table( T1_Table* table );
LOCAL_DEF
T1_Long T1_ToInt ( T1_Parser* parser );
LOCAL_DEF
T1_Long T1_ToFixed( T1_Parser* parser, T1_Int power_ten );
LOCAL_DEF
T1_Int T1_ToCoordArray( T1_Parser* parser,
T1_Int max_coords,
T1_Short* coords );
LOCAL_DEF
T1_Int T1_ToFixedArray( T1_Parser* parser,
T1_Int max_values,
T1_Fixed* values,
T1_Int power_ten );
#if 0
LOCAL_DEF
T1_String* T1_ToString( T1_Parser* parser );
LOCAL_DEF
T1_Bool T1_ToBool( T1_Parser* parser );
#endif
LOCAL_DEF
void T1_Skip_Spaces( T1_Parser* parser );
LOCAL_DEF
void T1_ToToken( T1_Parser* parser,
T1_Token_Rec* token );
LOCAL_DEF
T1_Error T1_Load_Field( T1_Parser* parser,
const T1_Field_Rec* field,
void** objects,
T1_UInt max_objects,
T1_ULong* pflags );
LOCAL_DEF
T1_Error T1_Load_Field_Table( T1_Parser* parser,
const T1_Field_Rec* field,
void** objects,
T1_UInt max_objects,
T1_ULong* pflags );
LOCAL_DEF
T1_Error T1_New_Parser( T1_Parser* parser,
FT_Stream stream,
FT_Memory memory );
LOCAL_DEF
T1_Error T1_Get_Private_Dict( T1_Parser* parser );
LOCAL_DEF
void T1_Decrypt( T1_Byte* buffer,
T1_Int length,
T1_UShort seed );
LOCAL_DEF
void T1_Done_Parser( T1_Parser* parser );
#ifdef __cplusplus
}
#endif
#endif /* T1PARSE_H */
/* END */