257 lines
12 KiB
C
257 lines
12 KiB
C
/***************************************************************************/
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/* */
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/* t1parse.h */
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/* */
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/* Type 1 parser (specification). */
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/* */
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/* Copyright 1996-2000 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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/*************************************************************************/
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/* */
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/* The Type1 parser component is in charge of simply parsing the font */
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/* input stream and convert simple tokens and elements into integers, */
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/* floats, matrices, strings, etc. */
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/* */
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/* It is used by the Type1 loader. */
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/* */
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/*************************************************************************/
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#ifndef T1PARSE_H
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#define T1PARSE_H
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#include <freetype/internal/ftstream.h>
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#ifdef FT_FLAT_COMPILE
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#include "t1tokens.h"
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#else
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#include <type1/t1tokens.h>
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*************************************************************************/
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/* */
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/* <Enum> */
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/* T1_DictState */
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/* */
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/* <Description> */
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/* An enumeration used to describe the Type 1 parser's state, i.e. */
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/* which dictionary (or array) it is scanning and processing at the */
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/* current moment. */
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/* */
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typedef enum T1_DictState_
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{
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dict_none = 0,
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dict_font, /* parsing the font dictionary */
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dict_fontinfo, /* parsing the font info dictionary */
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dict_none2, /* beginning to parse the encrypted section */
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dict_private, /* parsing the private dictionary */
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dict_encoding, /* parsing the encoding array */
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dict_subrs, /* parsing the subrs array */
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dict_othersubrs, /* parsing the othersubrs array (?) */
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dict_charstrings, /* parsing the charstrings dictionary */
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dict_unknown_array, /* parsing/ignoring an unknown array */
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dict_unknown_dict, /* parsing/ignoring an unknown dictionary */
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dict_max /* do not remove from list */
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} T1_DictState;
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/*************************************************************************/
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/* */
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/* <Struct> */
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/* T1_Table */
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/* */
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/* <Description> */
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/* A T1_Table is a simple object used to store an array of objects in */
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/* a single memory block. */
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/* */
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/* <Fields> */
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/* block :: The address in memory of the growheap's block. This */
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/* can change between two object adds, due to */
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/* reallocation. */
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/* */
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/* cursor :: The current top of the grow heap within its block. */
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/* */
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/* capacity :: The current size of the heap block. Increments by */
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/* 1kByte chunks. */
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/* */
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/* max_elems :: The maximum number of elements in table. */
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/* */
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/* num_elems :: The current number of elements in table. */
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/* */
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/* elements :: A table of element addresses within the block. */
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/* */
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/* lengths :: A table of element sizes within the block. */
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/* */
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/* memory :: The object used for memory operations */
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/* (alloc/realloc). */
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/* */
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typedef struct T1_Table_
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{
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FT_Byte* block; /* current memory block */
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FT_Int cursor; /* current cursor in memory block */
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FT_Int capacity; /* current size of memory block */
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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_Int* lengths; /* lengths of table elements */
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FT_Memory memory;
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} T1_Table;
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/*************************************************************************/
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/* */
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/* <Struct> */
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/* T1_Parser */
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/* */
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/* <Description> */
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/* A Type 1 parser. This object is in charge of parsing Type 1 ASCII */
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/* streams and builds dictionaries for a T1_Face object. */
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/* */
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/* <Fields> */
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/* error :: The current error code. 0 means success. */
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/* */
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/* face :: The target T1_Face object being built. */
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/* */
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/* tokenizer :: The tokenizer (lexical analyser) used for */
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/* processing the input stream. */
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/* */
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/* dump_tokens :: XXX */
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/* */
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/* stack :: The current token stack. Note that we don't */
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/* use intermediate Postscript objects here! */
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/* */
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/* top :: The current top of token stack. */
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/* */
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/* limit :: The current upper bound of the token stack. */
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/* Used for overflow checks. */
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/* */
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/* args :: The arguments of a given operator. Used and */
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/* increased by the various CopyXXX() functions. */
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/* */
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/* state_index :: The index of the top of the dictionary state */
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/* stack. */
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/* */
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/* state_stack :: The dictionary states stack. */
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/* */
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/* table :: A T1_Table object used to record various kinds */
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/* of dictionaries or arrays (like `/Encoding', */
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/* `/Subrs', `/CharStrings'). */
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/* */
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/* cur_name :: XXX */
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/* */
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/* encoding_type :: XXX */
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/* */
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/* encoding_names :: XXX */
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/* */
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/* encoding_lengths :: XXX */
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/* */
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/* encoding_offsets :: XXX */
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/* */
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/* subrs :: XXX */
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/* */
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/* charstrings :: XXX */
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/* */
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typedef struct T1_Parser_
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{
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FT_Error error;
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T1_Face face;
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T1_Tokenizer tokenizer;
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FT_Bool dump_tokens;
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T1_Token stack[T1_MAX_STACK_DEPTH];
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T1_Token* top;
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T1_Token* limit;
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T1_Token* args;
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FT_Int state_index;
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T1_DictState state_stack[T1_MAX_DICT_DEPTH];
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T1_Table table;
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FT_Int cur_name;
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T1_EncodingType encoding_type;
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FT_Byte* encoding_names;
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FT_Int* encoding_lengths;
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FT_Byte** encoding_offsets;
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FT_Byte* subrs;
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FT_Byte* charstrings;
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} T1_Parser;
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LOCAL_DEF
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FT_Error T1_New_Table( T1_Table* table,
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FT_Int count,
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FT_Memory memory );
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LOCAL_DEF
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FT_Error T1_Add_Table( T1_Table* table,
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FT_Int index,
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void* object,
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FT_Int length );
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LOCAL_DEF
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void T1_Done_Table( T1_Table* table );
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LOCAL_DEF
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FT_String* CopyString( T1_Parser* parser );
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LOCAL_DEF
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FT_Long CopyInteger( T1_Parser* parser );
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LOCAL_DEF
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FT_Bool CopyBoolean( T1_Parser* parser );
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LOCAL_DEF
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FT_Long CopyFloat( T1_Parser* parser,
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FT_Int scale );
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LOCAL_DEF
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void CopyBBox( T1_Parser* parser,
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FT_BBox* bbox );
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LOCAL_DEF
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void CopyMatrix( T1_Parser* parser,
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FT_Matrix* matrix );
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LOCAL_DEF
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void CopyArray( T1_Parser* parser,
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FT_Byte* num_elements,
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FT_Short* elements,
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FT_Int max_elements );
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#ifdef __cplusplus
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}
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#endif
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#endif /* T1PARSE_H */
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/* END */
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