📄 psaux.h
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/***************************************************************************/
/* */
/* psaux.h */
/* */
/* Auxiliary functions and data structures related to PostScript fonts */
/* (specification). */
/* */
/* Copyright 1996-2001, 2002, 2003, 2004, 2006 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 __PSAUX_H__
#define __PSAUX_H__
#include <ft2build.h>
#include FT_INTERNAL_OBJECTS_H
#include FT_INTERNAL_TYPE1_TYPES_H
#include FT_SERVICE_POSTSCRIPT_CMAPS_H
FT_BEGIN_HEADER
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** T1_TABLE *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
typedef struct PS_TableRec_* PS_Table;
typedef const struct PS_Table_FuncsRec_* PS_Table_Funcs;
/*************************************************************************/
/* */
/* <Struct> */
/* PS_Table_FuncsRec */
/* */
/* <Description> */
/* A set of function pointers to manage PS_Table objects. */
/* */
/* <Fields> */
/* table_init :: Used to initialize a table. */
/* */
/* table_done :: Finalizes resp. destroy a given table. */
/* */
/* table_add :: Adds a new object to a table. */
/* */
/* table_release :: Releases table data, then finalizes it. */
/* */
typedef struct PS_Table_FuncsRec_
{
FT_Error
(*init)( PS_Table table,
FT_Int count,
FT_Memory memory );
void
(*done)( PS_Table table );
FT_Error
(*add)( PS_Table table,
FT_Int idx,
void* object,
FT_PtrDist length );
void
(*release)( PS_Table table );
} PS_Table_FuncsRec;
/*************************************************************************/
/* */
/* <Struct> */
/* PS_TableRec */
/* */
/* <Description> */
/* A PS_Table is a simple object used to store an array of objects in */
/* a single memory block. */
/* */
/* <Fields> */
/* block :: The address in memory of the growheap's block. This */
/* can change between two object adds, due to */
/* reallocation. */
/* */
/* cursor :: The current top of the grow heap within its block. */
/* */
/* capacity :: The current size of the heap block. Increments by */
/* 1kByte chunks. */
/* */
/* max_elems :: The maximum number of elements in table. */
/* */
/* num_elems :: The current number of elements in table. */
/* */
/* elements :: A table of element addresses within the block. */
/* */
/* lengths :: A table of element sizes within the block. */
/* */
/* memory :: The object used for memory operations */
/* (alloc/realloc). */
/* */
/* funcs :: A table of method pointers for this object. */
/* */
typedef struct PS_TableRec_
{
FT_Byte* block; /* current memory block */
FT_Offset cursor; /* current cursor in memory block */
FT_Offset 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_PtrDist* lengths; /* lengths of table elements */
FT_Memory memory;
PS_Table_FuncsRec funcs;
} PS_TableRec;
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** T1 FIELDS & TOKENS *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
typedef struct PS_ParserRec_* PS_Parser;
typedef struct T1_TokenRec_* T1_Token;
typedef struct T1_FieldRec_* T1_Field;
/* simple enumeration type used to identify token types */
typedef enum T1_TokenType_
{
T1_TOKEN_TYPE_NONE = 0,
T1_TOKEN_TYPE_ANY,
T1_TOKEN_TYPE_STRING,
T1_TOKEN_TYPE_ARRAY,
T1_TOKEN_TYPE_KEY, /* aka `name' */
/* do not remove */
T1_TOKEN_TYPE_MAX
} T1_TokenType;
/* a simple structure used to identify tokens */
typedef struct T1_TokenRec_
{
FT_Byte* start; /* first character of token in input stream */
FT_Byte* limit; /* first character after the token */
T1_TokenType type; /* type of token */
} T1_TokenRec;
/* enumeration type used to identify object fields */
typedef enum T1_FieldType_
{
T1_FIELD_TYPE_NONE = 0,
T1_FIELD_TYPE_BOOL,
T1_FIELD_TYPE_INTEGER,
T1_FIELD_TYPE_FIXED,
T1_FIELD_TYPE_FIXED_1000,
T1_FIELD_TYPE_STRING,
T1_FIELD_TYPE_KEY,
T1_FIELD_TYPE_BBOX,
T1_FIELD_TYPE_INTEGER_ARRAY,
T1_FIELD_TYPE_FIXED_ARRAY,
T1_FIELD_TYPE_CALLBACK,
/* do not remove */
T1_FIELD_TYPE_MAX
} T1_FieldType;
typedef enum T1_FieldLocation_
{
T1_FIELD_LOCATION_CID_INFO,
T1_FIELD_LOCATION_FONT_DICT,
T1_FIELD_LOCATION_FONT_INFO,
T1_FIELD_LOCATION_PRIVATE,
T1_FIELD_LOCATION_BBOX,
T1_FIELD_LOCATION_LOADER,
T1_FIELD_LOCATION_FACE,
T1_FIELD_LOCATION_BLEND,
/* do not remove */
T1_FIELD_LOCATION_MAX
} T1_FieldLocation;
typedef void
(*T1_Field_ParseFunc)( FT_Face face,
FT_Pointer parser );
/* structure type used to model object fields */
typedef struct T1_FieldRec_
{
const char* ident; /* field identifier */
T1_FieldLocation location;
T1_FieldType type; /* type of field */
T1_Field_ParseFunc reader;
FT_UInt offset; /* offset of field in object */
FT_Byte size; /* size of field in bytes */
FT_UInt array_max; /* maximal number of elements for */
/* array */
FT_UInt count_offset; /* offset of element count for */
/* arrays */
FT_UInt dict; /* where we expect it */
} T1_FieldRec;
#define T1_FIELD_DICT_FONTDICT ( 1 << 0 ) /* also FontInfo and FDArray */
#define T1_FIELD_DICT_PRIVATE ( 1 << 1 )
#define T1_NEW_SIMPLE_FIELD( _ident, _type, _fname, _dict ) \
{ \
_ident, T1CODE, _type, \
0, \
FT_FIELD_OFFSET( _fname ), \
FT_FIELD_SIZE( _fname ), \
0, 0, \
_dict \
},
#define T1_NEW_CALLBACK_FIELD( _ident, _reader, _dict ) \
{ \
_ident, T1CODE, T1_FIELD_TYPE_CALLBACK, \
(T1_Field_ParseFunc)_reader, \
0, 0, \
0, 0, \
_dict \
},
#define T1_NEW_TABLE_FIELD( _ident, _type, _fname, _max, _dict ) \
{ \
_ident, T1CODE, _type, \
0, \
FT_FIELD_OFFSET( _fname ), \
FT_FIELD_SIZE_DELTA( _fname ), \
_max, \
FT_FIELD_OFFSET( num_ ## _fname ), \
_dict \
},
#define T1_NEW_TABLE_FIELD2( _ident, _type, _fname, _max, _dict ) \
{ \
_ident, T1CODE, _type, \
0, \
FT_FIELD_OFFSET( _fname ), \
FT_FIELD_SIZE_DELTA( _fname ), \
_max, 0, \
_dict \
},
#define T1_FIELD_BOOL( _ident, _fname, _dict ) \
T1_NEW_SIMPLE_FIELD( _ident, T1_FIELD_TYPE_BOOL, _fname, _dict )
#define T1_FIELD_NUM( _ident, _fname, _dict ) \
T1_NEW_SIMPLE_FIELD( _ident, T1_FIELD_TYPE_INTEGER, _fname, _dict )
#define T1_FIELD_FIXED( _ident, _fname, _dict ) \
T1_NEW_SIMPLE_FIELD( _ident, T1_FIELD_TYPE_FIXED, _fname, _dict )
#define T1_FIELD_FIXED_1000( _ident, _fname, _dict ) \
T1_NEW_SIMPLE_FIELD( _ident, T1_FIELD_TYPE_FIXED_1000, _fname, \
_dict )
#define T1_FIELD_STRING( _ident, _fname, _dict ) \
T1_NEW_SIMPLE_FIELD( _ident, T1_FIELD_TYPE_STRING, _fname, _dict )
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