/***************************************************************************/
/* */
/* psaux.h */
/* */
/* Auxiliary functions and data structures related to PostScript fonts */
/* (specification). */
/* */
/* Copyright 1996-2001, 2002, 2003, 2004, 2006, 2008, 2009 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_EXTRA,
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; must not be zero if in */
/* use -- in other words, a */
/* `num_FOO' element must not */
/* start the used structure if we */
/* parse a `FOO' array */
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 )
#define T1_FIELD_KEY( _ident, _fname, _dict ) \
T1_NEW_SIMPLE_FIELD( _ident, T1_FIELD_TYPE_KEY, _fname, _dict )
#define T1_FIELD_BBOX( _ident, _fname, _dict ) \
T1_NEW_SIMPLE_FIELD( _ident, T1_FIELD_TYPE_BBOX, _fname, _dict )
#define T1_FIELD_NUM_TABLE( _ident, _fname, _fmax, _dict ) \
T1_NEW_TABLE_FIELD( _ident, T1_FIELD_TYPE_INTEGER_ARRAY, \
_fname, _fmax, _dict )
#define T1_FIELD_FIXED_TABLE( _ident, _fname, _fmax, _dict ) \
T1_NEW_TABLE_FIELD( _ident, T1_FIELD_TYPE_FIXED_ARRAY, \
_fname, _fmax, _dict )
#define T1_FIELD_NUM_TABLE2( _ident, _fname, _fmax, _dict ) \
T1_NEW_TABLE_FIELD2( _ident, T1_FIELD_TYPE_INTEGER_ARRAY, \
_fname, _fmax, _dict )
#define T1_FIELD_FIXED_TABLE2( _ident, _fname, _fmax, _dict ) \
T1_NEW_TABLE_FIELD2( _ident, T1_FIELD_TYPE_FIXED_ARRAY, \
_fname, _fmax, _dict )
#define T1_FIELD_CALLBACK( _ident, _name, _dict ) \
T1_NEW_CALLBACK_FIELD( _ident, _name, _dict )
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** T1 PARSER *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
typedef const struct PS_Parser_FuncsRec_* PS_Parser_Funcs;
typedef struct PS_Parser_FuncsRec_
{
void
(*init)( PS_Parser parser,
FT_Byte* base,
FT_Byte* limit,
FT_Memory memory );
void
(*done)( PS_Parser parser );
void
(*skip_spaces)( PS_Parser parser );
void
(*skip_PS_token)( PS_Parser parser );
FT_Long
(*to_int)( PS_Parser parser );
FT_Fixed
(*to_fixed)( PS_Parser parser,
FT_Int power_ten );
FT_Error
(*to_bytes)( PS_Parser parser,
FT_Byte* bytes,
FT_Offset max_bytes,
FT_Long* pnum_bytes,
FT_Bool delimiters );
FT_Int
(*to_coord_array)( PS_Parser parser,
FT_Int max_coords,
FT_Short* coords );
FT_Int
(*to_fixed_array)( PS_Parser parser,
FT_Int max_values,
FT_Fixed* values,
FT_Int power_ten );
void
(*to_token)( PS_Parser parser,
T1_Token token );
void
(*to_token_array)( PS_Parser parser,
T1_Token tokens,
FT_UInt max_tokens,
FT_Int* pnum_tokens );
FT_Error
(*load_field)( PS_Parser parser,
const T1_Field field,
void** objects,
FT_UInt max_objects,
FT_ULong* pflags );
FT_Error
(*load_field_table)( PS_Parser parser,
const T1_Field field,
void** objects,
FT_UInt max_objects,
FT_ULong* pflags );
} PS_Parser_FuncsRec;
/*************************************************************************/
/* */
/* <Struct> */
/* PS_ParserRec */
/* */
/* <Description> */
/* A PS_Parser is an object used to parse a Type 1 font very quickly. */
/* */
/* <Fields> */
/* cursor :: The current position in the text. */
/* */
/* base :: Start of the processed text. */
/* */
/* limit :: End of the processed text. */
/* */
/* error :: The last error returned. */
/* */
/* memory :: The object used for memory operations (alloc/realloc). */
/* */
/* funcs :: A table of functions for the parser. */
/* */
typedef struct PS_ParserRec_
{
FT_Byte* cursor;
FT_Byte* base;
FT_Byte* limit;
FT_Error error;
FT_Memory memory;
PS_Parser_FuncsRec funcs;
} PS_ParserRec;
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** T1 BUILDER *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
typedef struct T1_BuilderRec_* T1_Builder;
typedef FT_Error
(*T1_Builder_Check_Points_Func)( T1_Builder builder,
FT_Int count );
typedef void
(*T1_Builder_Add_Point_Func)( T1_Builder builder,
FT_Pos x,
FT_Pos y,
FT_Byte flag );
typedef FT_Error
(*T1_Builder_Add_Point1_Func)( T1_Builder builder,
FT_Pos x,
FT_Pos y );
typedef FT_Error
(*T1_Builder_Add_Contour_Func)( T1_Builder builder );
typedef FT_Error
(*T1_Builder_Start_Point_Func)( T1_Builder builder,
FT_Pos x,
FT_Pos y );
typedef void
(*T1_Builder_Close_Contour_Func)( T1_Builder builder );
typedef const struct T1_Builder_FuncsRec_* T1_Builder_Funcs;
typedef struct T1_Builder_FuncsRec_
{
void
(*init)( T1_Builder builder,
FT_Face face,
FT_Size size,
FT_GlyphSlot slot,
FT_Bool hinting );
void
(*done)( T1_Builder builder );
T1_Builder_Check_Points_Func check_points;
T1_Builder_Add_Point_Func add_point;
T1_Builder_Add_Point1_Func add_point1;
T1_Builder_Add_Contour_Func add_contour;
T1_Builder_Start_Point_Func start_point;
T1_Builder_Close_Contour_Func close_contour;
} T1_Builder_FuncsRec;
/* an enumeration type to handle charstring parsing states */
typedef enum T1_ParseState_
{
T1_Parse_Start,
T1_Parse_Have_Width,
T1_Parse_Have_Moveto,
T1_Parse_Have_Path
} T1_ParseState;
/*************************************************************************/
/* */
/* <Structure> */
/* T1_BuilderRec */
/* */
/* <Description> */
/* A structure used during glyph loading to store its outline. */
/* */
/* <Fields> */
/* memory :: The current memory object. */
/* */
/* face :: The current face object. */
/* */
/* glyph :: The current glyph slot. */
/* */
/* loader :: XXX */
/* */
/* base :: The base glyph outline. */
/* */
/* current :: The current glyph outline. */
/* */
/* max_points :: maximum points in builder outline */
/* */
/* max_contours :: Maximal number of contours in builder outline. */
/* */
/* pos_x :: The horizontal translation (if composite glyph). */
/* */
/* pos_y :: The vertical translation (if composite glyph). */
/* */
/* left_bearing :: The left side bearing point. */
/* */
/* advance :: The horizontal advance vector. */
/* */
/* bbox :: Unused. */
/* */
/* parse_state :: An enumeration which controls the charstring */
/* parsing state. */
/* */
/* load_points :: If this flag is not set, no points are loaded. */
/* */
/* no_recurse :: Set but not used. */
/* */
/* metrics_only :: A boolean indicating that we only want to compute */
/* the metrics of a given glyph, not load all of its */
/* points. */
/* */
/* funcs :: An array of function pointers for the builder. */
/* */
typedef struct T1_BuilderRec_
{
FT_Memory memory;
FT_Face face;
FT_GlyphSlot glyph;
FT_GlyphLoader loader;
FT_Outline* base;
FT_Outline* current;
FT_Pos pos_x;
FT_Pos pos_y;
FT_Vector left_bearing;
FT_Vector advance;
FT_BBox bbox; /* bounding box */
T1_ParseState parse_state;
FT_Bool load_points;
FT_Bool no_recurse;
FT_Bool metrics_only;
void* hints_funcs; /* hinter-specific */
void* hints_globals; /* hinter-specific */
T1_Builder_FuncsRec funcs;
} T1_BuilderRec;
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** T1 DECODER *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
#if 0
/*************************************************************************/
/* */
/* T1_MAX_SUBRS_CALLS details the maximum number of nested sub-routine */
/* calls during glyph loading. */
/* */
#define T1_MAX_SUBRS_CALLS 8
/*************************************************************************/
/* */
/* T1_MAX_CHARSTRING_OPERANDS is the charstring stack's capacity. A */
/* minimum of 16 is required. */
/* */
#define T1_MAX_CHARSTRINGS_OPERANDS 32
#endif /* 0 */
typedef struct T1_Decoder_ZoneRec_
{
FT_Byte* cursor;
FT_Byte* base;
FT_Byte* limit;
} T1_Decoder_ZoneRec, *T1_Decoder_Zone;
typedef struct T1_DecoderRec_* T1_Decoder;
typedef const struct T1_Decoder_FuncsRec_* T1_Decoder_Funcs;
typedef FT_Error
(*T1_Decoder_Callback)( T1_Decoder decoder,
FT_UInt glyph_index );
typedef struct T1_Decoder_FuncsRec_
{
FT_Error
(*init)( T1_Decoder decoder,
FT_Face face,
FT_Size size,
FT_GlyphSlot slot,
FT_Byte** glyph_names,
PS_Blend blend,
FT_Bool hinting,
FT_Render_Mode hint_mode,
T1_Decoder_Callback callback );
void
(*done)( T1_Decoder decoder );
FT_Error
(*parse_charstrings)( T1_Decoder decoder,
FT_Byte* base,
FT_UInt len );
} T1_Decoder_FuncsRec;
typedef struct T1_DecoderRec_
{
T1_BuilderRec builder;
FT_Long stack[T1_MAX_CHARSTRINGS_OPERANDS];
FT_Long* top;
T1_Decoder_ZoneRec zones[T1_MAX_SUBRS_CALLS + 1];
T1_Decoder_Zone zone;
FT_Service_PsCMaps psnames; /* for seac */
FT_UInt num_glyphs;
FT_Byte** glyph_names;
FT_Int lenIV; /* internal for sub routine calls */
FT_UInt num_subrs;
FT_Byte** subrs;
FT_PtrDist* subrs_len; /* array of subrs length (optional) */
FT_Matrix font_matrix;
FT_Vector font_offset;
FT_Int flex_state;
FT_Int num_flex_vectors;
FT_Vector flex_vectors[7];
PS_Blend blend; /* for multiple master support */
FT_Render_Mode hint_mode;
T1_Decoder_Callback parse_callback;
T1_Decoder_FuncsRec funcs;
FT_Long* buildchar;
FT_UInt len_buildchar;
FT_Bool seac;
} T1_DecoderRec;
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** AFM PARSER *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
typedef struct AFM_ParserRec_* AFM_Parser;
typedef struct AFM_Parser_FuncsRec_
{
FT_Error
(*init)( AFM_Parser parser,
FT_Memory memory,
FT_Byte* base,
FT_Byte* limit );
void
(*done)( AFM_Parser parser );
FT_Error
(*parse)( AFM_Parser parser );
} AFM_Parser_FuncsRec;
typedef struct AFM_StreamRec_* AFM_Stream;
/*************************************************************************/
/* */
/* <Struct> */
/* AFM_ParserRec */
/* */
/* <Description> */
/* An AFM_Parser is a parser for the AFM files. */
/* */
/* <Fields> */
/* memory :: The object used for memory operations (alloc and */
/* realloc). */
/* */
/* stream :: This is an opaque object. */
/* */
/* FontInfo :: The result will be stored here. */
/* */
/* get_index :: A user provided function to get a glyph index by its */
/* name. */
/* */
typedef struct AFM_ParserRec_
{
FT_Memory memory;
AFM_Stream stream;
AFM_FontInfo FontInfo;
FT_Int
(*get_index)( const char* name,
FT_Offset len,
void* user_data );
void* user_data;
} AFM_ParserRec;
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** TYPE1 CHARMAPS *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
typedef const struct T1_CMap_ClassesRec_* T1_CMap_Classes;
typedef struct T1_CMap_ClassesRec_
{
FT_CMap_Class standard;
FT_CMap_Class expert;
FT_CMap_Class custom;
FT_CMap_Class unicode;
} T1_CMap_ClassesRec;
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** PSAux Module Interface *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
typedef struct PSAux_ServiceRec_
{
/* don't use `PS_Table_Funcs' and friends to avoid compiler warnings */
const PS_Table_FuncsRec* ps_table_funcs;
const PS_Parser_FuncsRec* ps_parser_funcs;
const T1_Builder_FuncsRec* t1_builder_funcs;
const T1_Decoder_FuncsRec* t1_decoder_funcs;
void
(*t1_decrypt)( FT_Byte* buffer,
FT_Offset length,
FT_UShort seed );
T1_CMap_Classes t1_cmap_classes;
/* fields after this comment line were added after version 2.1.10 */
const AFM_Parser_FuncsRec* afm_parser_funcs;
} PSAux_ServiceRec, *PSAux_Service;
/* backwards-compatible type definition */
typedef PSAux_ServiceRec PSAux_Interface;
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** Some convenience functions *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
#define IS_PS_NEWLINE( ch ) \
( (ch) == '\r' || \
(ch) == '\n' )
#define IS_PS_SPACE( ch ) \
( (ch) == ' ' || \
IS_PS_NEWLINE( ch ) || \
(ch) == '\t' || \
(ch) == '\f' || \
(ch) == '\0' )
#define IS_PS_SPECIAL( ch ) \
( (ch) == '/' || \
(ch) == '(' || (ch) == ')' || \
(ch) == '<' || (ch) == '>' || \
(ch) == '[' || (ch) == ']' || \
(ch) == '{' || (ch) == '}' || \
(ch) == '%' )
#define IS_PS_DELIM( ch ) \
( IS_PS_SPACE( ch ) || \
IS_PS_SPECIAL( ch ) )
#define IS_PS_DIGIT( ch ) \
( (ch) >= '0' && (ch) <= '9' )
#define IS_PS_XDIGIT( ch ) \
( IS_PS_DIGIT( ch ) || \
( (ch) >= 'A' && (ch) <= 'F' ) || \
( (ch) >= 'a' && (ch) <= 'f' ) )
#define IS_PS_BASE85( ch ) \
( (ch) >= '!' && (ch) <= 'u' )
#define IS_PS_TOKEN( cur, limit, token ) \
( (char)(cur)[0] == (token)[0] && \
( (cur) + sizeof ( (token) ) == (limit) || \
( (cur) + sizeof( (token) ) < (limit) && \
IS_PS_DELIM( (cur)[sizeof ( (token) ) - 1] ) ) ) && \
ft_strncmp( (char*)(cur), (token), sizeof ( (token) ) - 1 ) == 0 )
FT_END_HEADER
#endif /* __PSAUX_H__ */
/* END */
Submit an article or tip