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//========================================================================
//
// CharCodeToUnicode.h
//
// Mapping from character codes to Unicode.
//
// Copyright 2001-2003 Glyph & Cog, LLC
//
//========================================================================
#ifndef CHARCODETOUNICODE_H
#define CHARCODETOUNICODE_H
#include <aconf.h>
#ifdef USE_GCC_PRAGMAS
#pragma interface
#endif
#include "CharTypes.h"
struct CharCodeToUnicodeString;
//------------------------------------------------------------------------
class CharCodeToUnicode {
public:
// Create the CID-to-Unicode mapping specified by <collection>.
// This reads a .cidToUnicode file from disk. Sets the initial
// reference count to 1. Returns NULL on failure.
static CharCodeToUnicode *parseCIDToUnicode(GString *collectionA);
// Create the CharCode-to-Unicode mapping for an 8-bit font.
// <toUnicode> is an array of 256 Unicode indexes. Sets the initial
// reference count to 1.
static CharCodeToUnicode *make8BitToUnicode(Unicode *toUnicode);
// Parse a ToUnicode CMap for an 8- or 16-bit font.
static CharCodeToUnicode *parseCMap(GString *buf, int nBits);
~CharCodeToUnicode();
void incRefCnt();
void decRefCnt();
// Return true if this mapping matches the specified <collectionA>.
GBool match(GString *collectionA);
// Map a CharCode to Unicode.
int mapToUnicode(CharCode c, Unicode *u, int size);
private:
void parseCMap1(int (*getCharFunc)(void *), void *data, int nBits);
CharCodeToUnicode(GString *collectionA);
CharCodeToUnicode(GString *collectionA, Unicode *mapA,
CharCode mapLenA, GBool copyMap,
CharCodeToUnicodeString *sMapA, int sMapLenA);
GString *collection;
Unicode *map;
CharCode mapLen;
CharCodeToUnicodeString *sMap;
int sMapLen, sMapSize;
int refCnt;
};
//------------------------------------------------------------------------
#define cidToUnicodeCacheSize 4
class CIDToUnicodeCache {
public:
CIDToUnicodeCache();
~CIDToUnicodeCache();
// Get the CharCodeToUnicode object for <collection>. Increments
// its reference count; there will be one reference for the cache
// plus one for the caller of this function. Returns NULL on
// failure.
CharCodeToUnicode *getCIDToUnicode(GString *collection);
private:
CharCodeToUnicode *cache[cidToUnicodeCacheSize];
};
#endif
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