DtCharacterEncodingMap.h

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/******************************************************************************
** Copyright (c) 2024 MAK Technologies, Inc.
** All rights reserved.
******************************************************************************/


#pragma once
#include <vrvGraphics/vrvGraphics.h>
#include <unordered_map>

namespace makVrv
{
   class DtFreeTypeFace;

   class DT_DLL_VRVGRAPHICS DtCharacterEncodingMap
   {
   public:
      // CTOR
      DtCharacterEncodingMap(DtFreeTypeFace* face);
      ~DtCharacterEncodingMap();

      unsigned int encoding() const;

      bool setEncoding(unsigned int  encoding);

      size_t containerIndexOfGlyph(const unsigned int characterCode) const;
      size_t containerIndexFromIndexOfGlyph( const unsigned int glyphIndex ) const;
      
      unsigned int indexInFont(unsigned int characterCode) const;

      void setGlyphIndex(const unsigned int characterCode, const size_t containerIndex, unsigned int glyphIndex );

   protected:

      using CharacterCodeToContainerIndexMap = std::unordered_map<unsigned int, size_t> ;
      using GlyphIndexToContainerIndexMap = std::unordered_map<unsigned int, size_t>;
      CharacterCodeToContainerIndexMap myGlyphMap;
      GlyphIndexToContainerIndexMap myIndexMap;
      DtFreeTypeFace* myFace;

      unsigned int myEncoding;
      static const unsigned int TheCacheSize = 128;
      unsigned int myIndexCache[TheCacheSize];
   };
}