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// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
*******************************************************************************
*
* Copyright (C) 1999-2015, International Business Machines
* Corporation and others. All Rights Reserved.
*
*******************************************************************************
* file name: PortableFontInstance.h
*
* created on: 11/12/1999
* created by: Eric R. Mader
*/
#ifndef __PORTABLEFONTINSTANCE_H
#define __PORTABLEFONTINSTANCE_H
#include <stdio.h>
#include "layout/LETypes.h"
#include "layout/LEFontInstance.h"
#include "FontTableCache.h"
#include "sfnt.h"
#include "cmaps.h"
class PortableFontInstance : public LEFontInstance, protected FontTableCache
{
private:
FILE *fFile;
float fPointSize;
le_int32 fUnitsPerEM;
le_uint32 fFontChecksum;
le_int32 fAscent;
le_int32 fDescent;
le_int32 fLeading;
const SFNTDirectory *fDirectory;
le_uint16 fDirPower;
le_uint16 fDirExtra;
float fDeviceScaleX;
float fDeviceScaleY;
const NAMETable *fNAMETable;
le_uint16 fNameCount;
le_uint16 fNameStringOffset;
CMAPMapper *fCMAPMapper;
const HMTXTable *fHMTXTable;
le_uint16 fNumGlyphs;
le_uint16 fNumLongHorMetrics;
static le_int8 highBit(le_int32 value);
const DirectoryEntry *findTable(LETag tag) const;
const void *readTable(LETag tag, le_uint32 *length) const;
void getMetrics();
CMAPMapper *findUnicodeMapper();
protected:
const void *readFontTable(LETag tableTag) const { size_t ignored; return readFontTable(tableTag, ignored); }
const void *readFontTable(LETag tableTag, size_t &length) const override;
public:
PortableFontInstance(const char *fileName, float pointSize, LEErrorCode &status);
virtual ~PortableFontInstance();
const void *getFontTable(LETag tableTag, size_t &length) const override;
virtual const char *getNameString(le_uint16 nameID, le_uint16 platform, le_uint16 encoding, le_uint16 language) const;
virtual const LEUnicode16 *getUnicodeNameString(le_uint16 nameID, le_uint16 platform, le_uint16 encoding, le_uint16 language) const;
virtual void deleteNameString(const char *name) const;
virtual void deleteNameString(const LEUnicode16 *name) const;
le_int32 getUnitsPerEM() const override;
virtual le_uint32 getFontChecksum() const;
virtual le_uint32 getRawChecksum() const;
le_int32 getAscent() const override;
le_int32 getDescent() const override;
le_int32 getLeading() const override;
// We really want to inherit this method from the superclass, but some compilers
// issue a warning if we don't implement it...
LEGlyphID mapCharToGlyph(LEUnicode32 ch, const LECharMapper *mapper, le_bool filterZeroWidth) const override;
// We really want to inherit this method from the superclass, but some compilers
// issue a warning if we don't implement it...
LEGlyphID mapCharToGlyph(LEUnicode32 ch, const LECharMapper *mapper) const override;
LEGlyphID mapCharToGlyph(LEUnicode32 ch) const override;
void getGlyphAdvance(LEGlyphID glyph, LEPoint &advance) const override;
le_bool getGlyphPoint(LEGlyphID glyph, le_int32 pointNumber, LEPoint &point) const override;
float getXPixelsPerEm() const override;
float getYPixelsPerEm() const override;
float getScaleFactorX() const override;
float getScaleFactorY() const override;
};
#endif
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