ref: 69473e4efc4162cc837450e86b2621594e12af6e
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 <t1types.h>
#ifdef __cplusplus
extern "C" {
#endif
/*************************************************************************
*
* <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 );
LOCAL_DEF
T1_String* T1_ToString( T1_Parser* parser );
LOCAL_DEF
T1_Bool T1_ToBool( T1_Parser* parser );
#if 0
LOCAL_DEF
T1_Int T1_ToImmediate( T1_Parser* parser );
#endif
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 */