/*

  *******************************************************************************

  *

  *   Copyright (C) 1999-2003, 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_int32 fAscent;

     le_int32 fDescent;

     le_int32 fLeading;

     const SFNTDirectory *fDirectory;

     le_uint16 fDirPower;

     le_uint16 fDirExtra;

     float fDeviceScaleX;

     float fDeviceScaleY;

     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 deleteTable(const void *table) const;

     void getMetrics();

     CMAPMapper *findUnicodeMapper();

 protected:

     const void *readFontTable(LETag tableTag) const;

 public:

     PortableFontInstance(char *fileName, float pointSize, LEErrorCode &status);

     virtual ~PortableFontInstance();

     virtual const void *getFontTable(LETag tableTag) const;

     virtual le_int32 getUnitsPerEM() const

     {

         return fUnitsPerEM;

     };

     virtual le_int32 getAscent() const

     {

         return fAscent;

     }

     virtual le_int32 getDescent() const

     {

         return fDescent;

     }

     virtual le_int32 getLeading() const

     {

         return fLeading;

     }

     virtual LEGlyphID mapCharToGlyph(LEUnicode32 ch) const

     {

         return fCMAPMapper->unicodeToGlyph(ch);

     }

     virtual void getGlyphAdvance(LEGlyphID glyph, LEPoint &advance) const;

     virtual le_bool getGlyphPoint(LEGlyphID glyph, le_int32 pointNumber, LEPoint &point) const;

     float getXPixelsPerEm() const

     {

         return fPointSize;

     };

     float getYPixelsPerEm() const

     {

         return fPointSize;

     };

     float getScaleFactorX() const

     {

         return 1.0;

     }

     float getScaleFactorY() const

     {

         return 1.0;

     }

 };

 #endif