1440 lines
42 KiB
C
1440 lines
42 KiB
C
/****************************************************************************
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*
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* psaux.h
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*
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* Auxiliary functions and data structures related to PostScript fonts
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* (specification).
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*
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* Copyright (C) 1996-2020 by
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* David Turner, Robert Wilhelm, and Werner Lemberg.
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*
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* This file is part of the FreeType project, and may only be used,
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* modified, and distributed under the terms of the FreeType project
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* license, LICENSE.TXT. By continuing to use, modify, or distribute
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* this file you indicate that you have read the license and
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* understand and accept it fully.
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*
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*/
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#ifndef PSAUX_H_
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#define PSAUX_H_
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#include <ft2build.h>
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#include FT_INTERNAL_OBJECTS_H
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#include FT_INTERNAL_TYPE1_TYPES_H
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#include FT_INTERNAL_HASH_H
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#include FT_INTERNAL_TRUETYPE_TYPES_H
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#include FT_SERVICE_POSTSCRIPT_CMAPS_H
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#include FT_INTERNAL_CFF_TYPES_H
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#include FT_INTERNAL_CFF_OBJECTS_TYPES_H
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FT_BEGIN_HEADER
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/**************************************************************************
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*
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* PostScript modules driver class.
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*/
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typedef struct PS_DriverRec_
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{
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FT_DriverRec root;
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FT_UInt hinting_engine;
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FT_Bool no_stem_darkening;
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FT_Int darken_params[8];
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FT_Int32 random_seed;
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} PS_DriverRec, *PS_Driver;
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/*************************************************************************/
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/*************************************************************************/
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/***** *****/
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/***** T1_TABLE *****/
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/***** *****/
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/*************************************************************************/
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/*************************************************************************/
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typedef struct PS_TableRec_* PS_Table;
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typedef const struct PS_Table_FuncsRec_* PS_Table_Funcs;
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/**************************************************************************
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*
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* @struct:
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* PS_Table_FuncsRec
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*
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* @description:
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* A set of function pointers to manage PS_Table objects.
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*
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* @fields:
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* table_init ::
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* Used to initialize a table.
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*
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* table_done ::
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* Finalizes resp. destroy a given table.
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*
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* table_add ::
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* Adds a new object to a table.
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*
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* table_release ::
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* Releases table data, then finalizes it.
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*/
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typedef struct PS_Table_FuncsRec_
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{
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FT_Error
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(*init)( PS_Table table,
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FT_Int count,
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FT_Memory memory );
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void
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(*done)( PS_Table table );
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FT_Error
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(*add)( PS_Table table,
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FT_Int idx,
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const void* object,
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FT_UInt length );
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void
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(*release)( PS_Table table );
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} PS_Table_FuncsRec;
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/**************************************************************************
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*
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* @struct:
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* PS_TableRec
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*
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* @description:
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* A PS_Table is a simple object used to store an array of objects in a
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* single memory block.
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*
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* @fields:
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* block ::
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* The address in memory of the growheap's block. This can change
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* between two object adds, due to reallocation.
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*
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* cursor ::
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* The current top of the grow heap within its block.
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*
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* capacity ::
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* The current size of the heap block. Increments by 1kByte chunks.
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*
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* init ::
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* Set to 0xDEADBEEF if 'elements' and 'lengths' have been allocated.
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*
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* max_elems ::
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* The maximum number of elements in table.
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*
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* num_elems ::
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* The current number of elements in table.
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*
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* elements ::
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* A table of element addresses within the block.
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*
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* lengths ::
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* A table of element sizes within the block.
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*
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* memory ::
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* The object used for memory operations (alloc/realloc).
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*
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* funcs ::
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* A table of method pointers for this object.
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*/
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typedef struct PS_TableRec_
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{
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FT_Byte* block; /* current memory block */
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FT_Offset cursor; /* current cursor in memory block */
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FT_Offset capacity; /* current size of memory block */
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FT_ULong init;
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FT_Int max_elems;
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FT_Int num_elems;
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FT_Byte** elements; /* addresses of table elements */
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FT_UInt* lengths; /* lengths of table elements */
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FT_Memory memory;
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PS_Table_FuncsRec funcs;
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} PS_TableRec;
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/*************************************************************************/
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/*************************************************************************/
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/***** *****/
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/***** T1 FIELDS & TOKENS *****/
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/***** *****/
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/*************************************************************************/
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/*************************************************************************/
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typedef struct PS_ParserRec_* PS_Parser;
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typedef struct T1_TokenRec_* T1_Token;
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typedef struct T1_FieldRec_* T1_Field;
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/* simple enumeration type used to identify token types */
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typedef enum T1_TokenType_
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{
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T1_TOKEN_TYPE_NONE = 0,
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T1_TOKEN_TYPE_ANY,
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T1_TOKEN_TYPE_STRING,
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T1_TOKEN_TYPE_ARRAY,
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T1_TOKEN_TYPE_KEY, /* aka `name' */
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/* do not remove */
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T1_TOKEN_TYPE_MAX
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} T1_TokenType;
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/* a simple structure used to identify tokens */
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typedef struct T1_TokenRec_
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{
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FT_Byte* start; /* first character of token in input stream */
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FT_Byte* limit; /* first character after the token */
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T1_TokenType type; /* type of token */
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} T1_TokenRec;
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/* enumeration type used to identify object fields */
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typedef enum T1_FieldType_
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{
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T1_FIELD_TYPE_NONE = 0,
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T1_FIELD_TYPE_BOOL,
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T1_FIELD_TYPE_INTEGER,
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T1_FIELD_TYPE_FIXED,
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T1_FIELD_TYPE_FIXED_1000,
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T1_FIELD_TYPE_STRING,
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T1_FIELD_TYPE_KEY,
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T1_FIELD_TYPE_BBOX,
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T1_FIELD_TYPE_MM_BBOX,
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T1_FIELD_TYPE_INTEGER_ARRAY,
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T1_FIELD_TYPE_FIXED_ARRAY,
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T1_FIELD_TYPE_CALLBACK,
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/* do not remove */
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T1_FIELD_TYPE_MAX
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} T1_FieldType;
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typedef enum T1_FieldLocation_
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{
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T1_FIELD_LOCATION_CID_INFO,
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T1_FIELD_LOCATION_FONT_DICT,
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T1_FIELD_LOCATION_FONT_EXTRA,
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T1_FIELD_LOCATION_FONT_INFO,
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T1_FIELD_LOCATION_PRIVATE,
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T1_FIELD_LOCATION_BBOX,
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T1_FIELD_LOCATION_LOADER,
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T1_FIELD_LOCATION_FACE,
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T1_FIELD_LOCATION_BLEND,
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/* do not remove */
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T1_FIELD_LOCATION_MAX
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} T1_FieldLocation;
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typedef void
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(*T1_Field_ParseFunc)( FT_Face face,
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FT_Pointer parser );
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/* structure type used to model object fields */
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typedef struct T1_FieldRec_
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{
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const char* ident; /* field identifier */
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T1_FieldLocation location;
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T1_FieldType type; /* type of field */
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T1_Field_ParseFunc reader;
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FT_UInt offset; /* offset of field in object */
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FT_Byte size; /* size of field in bytes */
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FT_UInt array_max; /* maximum number of elements for */
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/* array */
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FT_UInt count_offset; /* offset of element count for */
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/* arrays; must not be zero if in */
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/* use -- in other words, a */
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/* `num_FOO' element must not */
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/* start the used structure if we */
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/* parse a `FOO' array */
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FT_UInt dict; /* where we expect it */
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} T1_FieldRec;
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#define T1_FIELD_DICT_FONTDICT ( 1 << 0 ) /* also FontInfo and FDArray */
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#define T1_FIELD_DICT_PRIVATE ( 1 << 1 )
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#define T1_NEW_SIMPLE_FIELD( _ident, _type, _fname, _dict ) \
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{ \
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_ident, T1CODE, _type, \
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0, \
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FT_FIELD_OFFSET( _fname ), \
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FT_FIELD_SIZE( _fname ), \
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0, 0, \
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_dict \
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},
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#define T1_NEW_CALLBACK_FIELD( _ident, _reader, _dict ) \
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{ \
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_ident, T1CODE, T1_FIELD_TYPE_CALLBACK, \
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(T1_Field_ParseFunc)_reader, \
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0, 0, \
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0, 0, \
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_dict \
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},
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#define T1_NEW_TABLE_FIELD( _ident, _type, _fname, _max, _dict ) \
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{ \
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_ident, T1CODE, _type, \
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0, \
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FT_FIELD_OFFSET( _fname ), \
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FT_FIELD_SIZE_DELTA( _fname ), \
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_max, \
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FT_FIELD_OFFSET( num_ ## _fname ), \
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_dict \
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},
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#define T1_NEW_TABLE_FIELD2( _ident, _type, _fname, _max, _dict ) \
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{ \
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_ident, T1CODE, _type, \
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0, \
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FT_FIELD_OFFSET( _fname ), \
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FT_FIELD_SIZE_DELTA( _fname ), \
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_max, 0, \
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_dict \
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},
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#define T1_FIELD_BOOL( _ident, _fname, _dict ) \
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T1_NEW_SIMPLE_FIELD( _ident, T1_FIELD_TYPE_BOOL, _fname, _dict )
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#define T1_FIELD_NUM( _ident, _fname, _dict ) \
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T1_NEW_SIMPLE_FIELD( _ident, T1_FIELD_TYPE_INTEGER, _fname, _dict )
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#define T1_FIELD_FIXED( _ident, _fname, _dict ) \
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T1_NEW_SIMPLE_FIELD( _ident, T1_FIELD_TYPE_FIXED, _fname, _dict )
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#define T1_FIELD_FIXED_1000( _ident, _fname, _dict ) \
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T1_NEW_SIMPLE_FIELD( _ident, T1_FIELD_TYPE_FIXED_1000, _fname, \
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_dict )
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#define T1_FIELD_STRING( _ident, _fname, _dict ) \
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T1_NEW_SIMPLE_FIELD( _ident, T1_FIELD_TYPE_STRING, _fname, _dict )
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#define T1_FIELD_KEY( _ident, _fname, _dict ) \
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T1_NEW_SIMPLE_FIELD( _ident, T1_FIELD_TYPE_KEY, _fname, _dict )
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#define T1_FIELD_BBOX( _ident, _fname, _dict ) \
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T1_NEW_SIMPLE_FIELD( _ident, T1_FIELD_TYPE_BBOX, _fname, _dict )
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#define T1_FIELD_NUM_TABLE( _ident, _fname, _fmax, _dict ) \
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T1_NEW_TABLE_FIELD( _ident, T1_FIELD_TYPE_INTEGER_ARRAY, \
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_fname, _fmax, _dict )
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#define T1_FIELD_FIXED_TABLE( _ident, _fname, _fmax, _dict ) \
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T1_NEW_TABLE_FIELD( _ident, T1_FIELD_TYPE_FIXED_ARRAY, \
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_fname, _fmax, _dict )
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#define T1_FIELD_NUM_TABLE2( _ident, _fname, _fmax, _dict ) \
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T1_NEW_TABLE_FIELD2( _ident, T1_FIELD_TYPE_INTEGER_ARRAY, \
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_fname, _fmax, _dict )
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#define T1_FIELD_FIXED_TABLE2( _ident, _fname, _fmax, _dict ) \
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T1_NEW_TABLE_FIELD2( _ident, T1_FIELD_TYPE_FIXED_ARRAY, \
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_fname, _fmax, _dict )
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#define T1_FIELD_CALLBACK( _ident, _name, _dict ) \
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T1_NEW_CALLBACK_FIELD( _ident, _name, _dict )
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/*************************************************************************/
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/*************************************************************************/
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/***** *****/
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/***** T1 PARSER *****/
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/***** *****/
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/*************************************************************************/
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/*************************************************************************/
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typedef const struct PS_Parser_FuncsRec_* PS_Parser_Funcs;
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typedef struct PS_Parser_FuncsRec_
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{
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void
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(*init)( PS_Parser parser,
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FT_Byte* base,
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FT_Byte* limit,
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FT_Memory memory );
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void
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(*done)( PS_Parser parser );
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void
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(*skip_spaces)( PS_Parser parser );
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void
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(*skip_PS_token)( PS_Parser parser );
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FT_Long
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(*to_int)( PS_Parser parser );
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FT_Fixed
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(*to_fixed)( PS_Parser parser,
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FT_Int power_ten );
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FT_Error
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(*to_bytes)( PS_Parser parser,
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FT_Byte* bytes,
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FT_Offset max_bytes,
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FT_ULong* pnum_bytes,
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FT_Bool delimiters );
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FT_Int
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(*to_coord_array)( PS_Parser parser,
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FT_Int max_coords,
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FT_Short* coords );
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FT_Int
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(*to_fixed_array)( PS_Parser parser,
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FT_Int max_values,
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FT_Fixed* values,
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FT_Int power_ten );
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void
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(*to_token)( PS_Parser parser,
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T1_Token token );
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void
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(*to_token_array)( PS_Parser parser,
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T1_Token tokens,
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FT_UInt max_tokens,
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FT_Int* pnum_tokens );
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FT_Error
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(*load_field)( PS_Parser parser,
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const T1_Field field,
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void** objects,
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FT_UInt max_objects,
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FT_ULong* pflags );
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FT_Error
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(*load_field_table)( PS_Parser parser,
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const T1_Field field,
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void** objects,
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FT_UInt max_objects,
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FT_ULong* pflags );
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} PS_Parser_FuncsRec;
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/**************************************************************************
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*
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* @struct:
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* PS_ParserRec
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*
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* @description:
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* A PS_Parser is an object used to parse a Type 1 font very quickly.
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*
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* @fields:
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* cursor ::
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* The current position in the text.
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*
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* base ::
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* Start of the processed text.
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*
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* limit ::
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* End of the processed text.
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*
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* error ::
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* The last error returned.
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*
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* memory ::
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* The object used for memory operations (alloc/realloc).
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*
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* funcs ::
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* A table of functions for the parser.
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*/
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typedef struct PS_ParserRec_
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{
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FT_Byte* cursor;
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FT_Byte* base;
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FT_Byte* limit;
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FT_Error error;
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FT_Memory memory;
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PS_Parser_FuncsRec funcs;
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} PS_ParserRec;
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/*************************************************************************/
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/*************************************************************************/
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/***** *****/
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/***** PS BUILDER *****/
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/***** *****/
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/*************************************************************************/
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/*************************************************************************/
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typedef struct PS_Builder_ PS_Builder;
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typedef const struct PS_Builder_FuncsRec_* PS_Builder_Funcs;
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typedef struct PS_Builder_FuncsRec_
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{
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void
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(*init)( PS_Builder* ps_builder,
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void* builder,
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FT_Bool is_t1 );
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void
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(*done)( PS_Builder* builder );
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} PS_Builder_FuncsRec;
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|
|
|
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/**************************************************************************
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*
|
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* @struct:
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* PS_Builder
|
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*
|
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* @description:
|
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* A structure used during glyph loading to store its outline.
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*
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* @fields:
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* memory ::
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* The current memory object.
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*
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* face ::
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* The current face object.
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*
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* glyph ::
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* The current glyph slot.
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*
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* loader ::
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* XXX
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*
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* base ::
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* The base glyph outline.
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*
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* current ::
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* The current glyph outline.
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*
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* pos_x ::
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* The horizontal translation (if composite glyph).
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*
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* pos_y ::
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* The vertical translation (if composite glyph).
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*
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* left_bearing ::
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* The left side bearing point.
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*
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* advance ::
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* The horizontal advance vector.
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*
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* bbox ::
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* Unused.
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*
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* path_begun ::
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* A flag which indicates that a new path has begun.
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*
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* load_points ::
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* If this flag is not set, no points are loaded.
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*
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* no_recurse ::
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* Set but not used.
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*
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* metrics_only ::
|
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* A boolean indicating that we only want to compute the metrics of a
|
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* given glyph, not load all of its points.
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*
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* is_t1 ::
|
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* Set if current font type is Type 1.
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*
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* funcs ::
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* An array of function pointers for the builder.
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*/
|
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struct PS_Builder_
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{
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FT_Memory memory;
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FT_Face face;
|
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CFF_GlyphSlot glyph;
|
|
FT_GlyphLoader loader;
|
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FT_Outline* base;
|
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FT_Outline* current;
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|
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FT_Pos* pos_x;
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FT_Pos* pos_y;
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|
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FT_Vector* left_bearing;
|
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FT_Vector* advance;
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|
|
FT_BBox* bbox; /* bounding box */
|
|
FT_Bool path_begun;
|
|
FT_Bool load_points;
|
|
FT_Bool no_recurse;
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|
|
FT_Bool metrics_only;
|
|
FT_Bool is_t1;
|
|
|
|
PS_Builder_FuncsRec funcs;
|
|
|
|
};
|
|
|
|
|
|
/*************************************************************************/
|
|
/*************************************************************************/
|
|
/***** *****/
|
|
/***** PS DECODER *****/
|
|
/***** *****/
|
|
/*************************************************************************/
|
|
/*************************************************************************/
|
|
|
|
#define PS_MAX_OPERANDS 48
|
|
#define PS_MAX_SUBRS_CALLS 16 /* maximum subroutine nesting; */
|
|
/* only 10 are allowed but there exist */
|
|
/* fonts like `HiraKakuProN-W3.ttf' */
|
|
/* (Hiragino Kaku Gothic ProN W3; */
|
|
/* 8.2d6e1; 2014-12-19) that exceed */
|
|
/* this limit */
|
|
|
|
/* execution context charstring zone */
|
|
|
|
typedef struct PS_Decoder_Zone_
|
|
{
|
|
FT_Byte* base;
|
|
FT_Byte* limit;
|
|
FT_Byte* cursor;
|
|
|
|
} PS_Decoder_Zone;
|
|
|
|
|
|
typedef FT_Error
|
|
(*CFF_Decoder_Get_Glyph_Callback)( TT_Face face,
|
|
FT_UInt glyph_index,
|
|
FT_Byte** pointer,
|
|
FT_ULong* length );
|
|
|
|
typedef void
|
|
(*CFF_Decoder_Free_Glyph_Callback)( TT_Face face,
|
|
FT_Byte** pointer,
|
|
FT_ULong length );
|
|
|
|
|
|
typedef struct PS_Decoder_
|
|
{
|
|
PS_Builder builder;
|
|
|
|
FT_Fixed stack[PS_MAX_OPERANDS + 1];
|
|
FT_Fixed* top;
|
|
|
|
PS_Decoder_Zone zones[PS_MAX_SUBRS_CALLS + 1];
|
|
PS_Decoder_Zone* zone;
|
|
|
|
FT_Int flex_state;
|
|
FT_Int num_flex_vectors;
|
|
FT_Vector flex_vectors[7];
|
|
|
|
CFF_Font cff;
|
|
CFF_SubFont current_subfont; /* for current glyph_index */
|
|
FT_Generic* cf2_instance;
|
|
|
|
FT_Pos* glyph_width;
|
|
FT_Bool width_only;
|
|
FT_Int num_hints;
|
|
|
|
FT_UInt num_locals;
|
|
FT_UInt num_globals;
|
|
|
|
FT_Int locals_bias;
|
|
FT_Int globals_bias;
|
|
|
|
FT_Byte** locals;
|
|
FT_Byte** globals;
|
|
|
|
FT_Byte** glyph_names; /* for pure CFF fonts only */
|
|
FT_UInt num_glyphs; /* number of glyphs in font */
|
|
|
|
FT_Render_Mode hint_mode;
|
|
|
|
FT_Bool seac;
|
|
|
|
CFF_Decoder_Get_Glyph_Callback get_glyph_callback;
|
|
CFF_Decoder_Free_Glyph_Callback free_glyph_callback;
|
|
|
|
/* Type 1 stuff */
|
|
FT_Service_PsCMaps psnames; /* for seac */
|
|
|
|
FT_Int lenIV; /* internal for sub routine calls */
|
|
FT_UInt* locals_len; /* array of subrs length (optional) */
|
|
FT_Hash locals_hash; /* used if `num_subrs' was massaged */
|
|
|
|
FT_Matrix font_matrix;
|
|
FT_Vector font_offset;
|
|
|
|
PS_Blend blend; /* for multiple master support */
|
|
|
|
FT_Long* buildchar;
|
|
FT_UInt len_buildchar;
|
|
|
|
} PS_Decoder;
|
|
|
|
|
|
/*************************************************************************/
|
|
/*************************************************************************/
|
|
/***** *****/
|
|
/***** 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;
|
|
|
|
|
|
/**************************************************************************
|
|
*
|
|
* @struct:
|
|
* 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 ::
|
|
* Maximum 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 );
|
|
|
|
#ifdef T1_CONFIG_OPTION_OLD_ENGINE
|
|
FT_Error
|
|
(*parse_charstrings_old)( T1_Decoder decoder,
|
|
FT_Byte* base,
|
|
FT_UInt len );
|
|
#else
|
|
FT_Error
|
|
(*parse_metrics)( T1_Decoder decoder,
|
|
FT_Byte* base,
|
|
FT_UInt len );
|
|
#endif
|
|
|
|
FT_Error
|
|
(*parse_charstrings)( PS_Decoder* decoder,
|
|
FT_Byte* charstring_base,
|
|
FT_ULong charstring_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_Int num_subrs;
|
|
FT_Byte** subrs;
|
|
FT_UInt* subrs_len; /* array of subrs length (optional) */
|
|
FT_Hash subrs_hash; /* used if `num_subrs' was massaged */
|
|
|
|
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;
|
|
|
|
FT_Generic cf2_instance;
|
|
|
|
} T1_DecoderRec;
|
|
|
|
|
|
/*************************************************************************/
|
|
/*************************************************************************/
|
|
/***** *****/
|
|
/***** CFF BUILDER *****/
|
|
/***** *****/
|
|
/*************************************************************************/
|
|
/*************************************************************************/
|
|
|
|
|
|
typedef struct CFF_Builder_ CFF_Builder;
|
|
|
|
|
|
typedef FT_Error
|
|
(*CFF_Builder_Check_Points_Func)( CFF_Builder* builder,
|
|
FT_Int count );
|
|
|
|
typedef void
|
|
(*CFF_Builder_Add_Point_Func)( CFF_Builder* builder,
|
|
FT_Pos x,
|
|
FT_Pos y,
|
|
FT_Byte flag );
|
|
typedef FT_Error
|
|
(*CFF_Builder_Add_Point1_Func)( CFF_Builder* builder,
|
|
FT_Pos x,
|
|
FT_Pos y );
|
|
typedef FT_Error
|
|
(*CFF_Builder_Start_Point_Func)( CFF_Builder* builder,
|
|
FT_Pos x,
|
|
FT_Pos y );
|
|
typedef void
|
|
(*CFF_Builder_Close_Contour_Func)( CFF_Builder* builder );
|
|
|
|
typedef FT_Error
|
|
(*CFF_Builder_Add_Contour_Func)( CFF_Builder* builder );
|
|
|
|
typedef const struct CFF_Builder_FuncsRec_* CFF_Builder_Funcs;
|
|
|
|
typedef struct CFF_Builder_FuncsRec_
|
|
{
|
|
void
|
|
(*init)( CFF_Builder* builder,
|
|
TT_Face face,
|
|
CFF_Size size,
|
|
CFF_GlyphSlot glyph,
|
|
FT_Bool hinting );
|
|
|
|
void
|
|
(*done)( CFF_Builder* builder );
|
|
|
|
CFF_Builder_Check_Points_Func check_points;
|
|
CFF_Builder_Add_Point_Func add_point;
|
|
CFF_Builder_Add_Point1_Func add_point1;
|
|
CFF_Builder_Add_Contour_Func add_contour;
|
|
CFF_Builder_Start_Point_Func start_point;
|
|
CFF_Builder_Close_Contour_Func close_contour;
|
|
|
|
} CFF_Builder_FuncsRec;
|
|
|
|
|
|
/**************************************************************************
|
|
*
|
|
* @struct:
|
|
* CFF_Builder
|
|
*
|
|
* @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 ::
|
|
* The current glyph loader.
|
|
*
|
|
* base ::
|
|
* The base glyph outline.
|
|
*
|
|
* current ::
|
|
* The current glyph 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.
|
|
*
|
|
* path_begun ::
|
|
* A flag which indicates that a new path has begun.
|
|
*
|
|
* 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.
|
|
*
|
|
* hints_funcs ::
|
|
* Auxiliary pointer for hinting.
|
|
*
|
|
* hints_globals ::
|
|
* Auxiliary pointer for hinting.
|
|
*
|
|
* funcs ::
|
|
* A table of method pointers for this object.
|
|
*/
|
|
struct CFF_Builder_
|
|
{
|
|
FT_Memory memory;
|
|
TT_Face face;
|
|
CFF_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 */
|
|
|
|
FT_Bool path_begun;
|
|
FT_Bool load_points;
|
|
FT_Bool no_recurse;
|
|
|
|
FT_Bool metrics_only;
|
|
|
|
void* hints_funcs; /* hinter-specific */
|
|
void* hints_globals; /* hinter-specific */
|
|
|
|
CFF_Builder_FuncsRec funcs;
|
|
};
|
|
|
|
|
|
/*************************************************************************/
|
|
/*************************************************************************/
|
|
/***** *****/
|
|
/***** CFF DECODER *****/
|
|
/***** *****/
|
|
/*************************************************************************/
|
|
/*************************************************************************/
|
|
|
|
|
|
#define CFF_MAX_OPERANDS 48
|
|
#define CFF_MAX_SUBRS_CALLS 16 /* maximum subroutine nesting; */
|
|
/* only 10 are allowed but there exist */
|
|
/* fonts like `HiraKakuProN-W3.ttf' */
|
|
/* (Hiragino Kaku Gothic ProN W3; */
|
|
/* 8.2d6e1; 2014-12-19) that exceed */
|
|
/* this limit */
|
|
#define CFF_MAX_TRANS_ELEMENTS 32
|
|
|
|
/* execution context charstring zone */
|
|
|
|
typedef struct CFF_Decoder_Zone_
|
|
{
|
|
FT_Byte* base;
|
|
FT_Byte* limit;
|
|
FT_Byte* cursor;
|
|
|
|
} CFF_Decoder_Zone;
|
|
|
|
|
|
typedef struct CFF_Decoder_
|
|
{
|
|
CFF_Builder builder;
|
|
CFF_Font cff;
|
|
|
|
FT_Fixed stack[CFF_MAX_OPERANDS + 1];
|
|
FT_Fixed* top;
|
|
|
|
CFF_Decoder_Zone zones[CFF_MAX_SUBRS_CALLS + 1];
|
|
CFF_Decoder_Zone* zone;
|
|
|
|
FT_Int flex_state;
|
|
FT_Int num_flex_vectors;
|
|
FT_Vector flex_vectors[7];
|
|
|
|
FT_Pos glyph_width;
|
|
FT_Pos nominal_width;
|
|
|
|
FT_Bool read_width;
|
|
FT_Bool width_only;
|
|
FT_Int num_hints;
|
|
FT_Fixed buildchar[CFF_MAX_TRANS_ELEMENTS];
|
|
|
|
FT_UInt num_locals;
|
|
FT_UInt num_globals;
|
|
|
|
FT_Int locals_bias;
|
|
FT_Int globals_bias;
|
|
|
|
FT_Byte** locals;
|
|
FT_Byte** globals;
|
|
|
|
FT_Byte** glyph_names; /* for pure CFF fonts only */
|
|
FT_UInt num_glyphs; /* number of glyphs in font */
|
|
|
|
FT_Render_Mode hint_mode;
|
|
|
|
FT_Bool seac;
|
|
|
|
CFF_SubFont current_subfont; /* for current glyph_index */
|
|
|
|
CFF_Decoder_Get_Glyph_Callback get_glyph_callback;
|
|
CFF_Decoder_Free_Glyph_Callback free_glyph_callback;
|
|
|
|
} CFF_Decoder;
|
|
|
|
|
|
typedef const struct CFF_Decoder_FuncsRec_* CFF_Decoder_Funcs;
|
|
|
|
typedef struct CFF_Decoder_FuncsRec_
|
|
{
|
|
void
|
|
(*init)( CFF_Decoder* decoder,
|
|
TT_Face face,
|
|
CFF_Size size,
|
|
CFF_GlyphSlot slot,
|
|
FT_Bool hinting,
|
|
FT_Render_Mode hint_mode,
|
|
CFF_Decoder_Get_Glyph_Callback get_callback,
|
|
CFF_Decoder_Free_Glyph_Callback free_callback );
|
|
|
|
FT_Error
|
|
(*prepare)( CFF_Decoder* decoder,
|
|
CFF_Size size,
|
|
FT_UInt glyph_index );
|
|
|
|
#ifdef CFF_CONFIG_OPTION_OLD_ENGINE
|
|
FT_Error
|
|
(*parse_charstrings_old)( CFF_Decoder* decoder,
|
|
FT_Byte* charstring_base,
|
|
FT_ULong charstring_len,
|
|
FT_Bool in_dict );
|
|
#endif
|
|
|
|
FT_Error
|
|
(*parse_charstrings)( PS_Decoder* decoder,
|
|
FT_Byte* charstring_base,
|
|
FT_ULong charstring_len );
|
|
|
|
} CFF_Decoder_FuncsRec;
|
|
|
|
|
|
/*************************************************************************/
|
|
/*************************************************************************/
|
|
/***** *****/
|
|
/***** 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 );
|
|
|
|
FT_UInt32
|
|
(*cff_random)( FT_UInt32 r );
|
|
|
|
void
|
|
(*ps_decoder_init)( PS_Decoder* ps_decoder,
|
|
void* decoder,
|
|
FT_Bool is_t1 );
|
|
|
|
void
|
|
(*t1_make_subfont)( FT_Face face,
|
|
PS_Private priv,
|
|
CFF_SubFont subfont );
|
|
|
|
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;
|
|
|
|
const CFF_Decoder_FuncsRec* cff_decoder_funcs;
|
|
|
|
} PSAux_ServiceRec, *PSAux_Service;
|
|
|
|
/* backward 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 */
|