137 lines
2.9 KiB
C++
137 lines
2.9 KiB
C++
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/*
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*******************************************************************************
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*
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* Copyright (C) 1999-2005, International Business Machines
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* Corporation and others. All Rights Reserved.
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*
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*******************************************************************************
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* file name: PortableFontInstance.h
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*
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* created on: 11/12/1999
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* created by: Eric R. Mader
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*/
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#ifndef __PORTABLEFONTINSTANCE_H
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#define __PORTABLEFONTINSTANCE_H
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#include <stdio.h>
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#include "layout/LETypes.h"
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#include "layout/LEFontInstance.h"
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#include "FontTableCache.h"
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#include "sfnt.h"
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#include "cmaps.h"
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class PortableFontInstance : public LEFontInstance, protected FontTableCache
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{
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private:
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FILE *fFile;
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float fPointSize;
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le_int32 fUnitsPerEM;
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le_uint32 fFontChecksum;
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le_int32 fAscent;
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le_int32 fDescent;
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le_int32 fLeading;
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const SFNTDirectory *fDirectory;
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le_uint16 fDirPower;
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le_uint16 fDirExtra;
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float fDeviceScaleX;
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float fDeviceScaleY;
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const NAMETable *fNAMETable;
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le_uint16 fNameCount;
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le_uint16 fNameStringOffset;
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CMAPMapper *fCMAPMapper;
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const HMTXTable *fHMTXTable;
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le_uint16 fNumGlyphs;
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le_uint16 fNumLongHorMetrics;
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static le_int8 highBit(le_int32 value);
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const DirectoryEntry *findTable(LETag tag) const;
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const void *readTable(LETag tag, le_uint32 *length) const;
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void deleteTable(const void *table) const;
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void getMetrics();
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CMAPMapper *findUnicodeMapper();
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protected:
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const void *readFontTable(LETag tableTag) const;
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public:
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PortableFontInstance(const char *fileName, float pointSize, LEErrorCode &status);
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virtual ~PortableFontInstance();
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virtual const void *getFontTable(LETag tableTag) const;
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virtual const char *getNameString(le_uint16 nameID, le_uint16 platform, le_uint16 encoding, le_uint16 language) const;
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virtual void deleteNameString(const char *name) const;
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virtual le_int32 getUnitsPerEM() const
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{
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return fUnitsPerEM;
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};
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virtual le_uint32 getFontChecksum() const
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{
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return fFontChecksum;
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}
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virtual le_int32 getAscent() const
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{
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return fAscent;
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}
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virtual le_int32 getDescent() const
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{
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return fDescent;
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}
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virtual le_int32 getLeading() const
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{
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return fLeading;
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}
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virtual LEGlyphID mapCharToGlyph(LEUnicode32 ch) const
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{
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return fCMAPMapper->unicodeToGlyph(ch);
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}
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virtual void getGlyphAdvance(LEGlyphID glyph, LEPoint &advance) const;
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virtual le_bool getGlyphPoint(LEGlyphID glyph, le_int32 pointNumber, LEPoint &point) const;
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float getXPixelsPerEm() const
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{
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return fPointSize;
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};
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float getYPixelsPerEm() const
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{
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return fPointSize;
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};
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float getScaleFactorX() const
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{
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return 1.0;
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}
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float getScaleFactorY() const
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{
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return 1.0;
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}
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};
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#endif
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