kc3-lang/ftgl/include/FTFace.h

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• Hash : 05317481
  Author :
  Date : 2004-10-05T04:48:14
  

  Added hasKerningTable member so we don't query the font every glyph. Got rid of the redundant Close() and unused UnitsPerEM()

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• include/FTFace.h

• #ifndef     __FTFace__
  #define     __FTFace__
  
  #include <ft2build.h>
  #include FT_FREETYPE_H
  #include FT_GLYPH_H
  
  #include "FTGL.h"
  #include "FTPoint.h"
  #include "FTSize.h"
  
  /**
   * FTFace class provides an abstraction layer for the Freetype Face.
   *
   * @see "Freetype 2 Documentation"
   *
   */
  class FTGL_EXPORT FTFace
  {
      public:
          /**
           * Opens and reads a face file. Error is set.
           *
           * @param filename  font file name.
           */
          FTFace( const char* filename);
  
          /**
           * Read face data from an in-memory buffer. Error is set.
           *
           * @param pBufferBytes  the in-memory buffer
           * @param bufferSizeInBytes  the length of the buffer in bytes
           */
          FTFace( const unsigned char *pBufferBytes, size_t bufferSizeInBytes );
  
          /**
           * Destructor
           *
           * Disposes of the current Freetype Face.
           */
          virtual ~FTFace();
  
          /**
           * Attach auxilliary file to font (e.g., font metrics).
           *
           * @param filename  auxilliary font file name.
           * @return          <code>true</code> if file has opened
           *                  successfully.
           */
          bool Attach( const char* filename);
  
          /**
           * Attach auxilliary data to font (e.g., font metrics) from memory
           *
           * @param pBufferBytes  the in-memory buffer
           * @param bufferSizeInBytes  the length of the buffer in bytes
           * @return          <code>true</code> if file has opened
           *                  successfully.
           */
          bool Attach( const unsigned char *pBufferBytes, size_t bufferSizeInBytes);
  
          /**
           * Get the freetype face object..
           *
           * @return pointer to an FT_Face.
           */
          FT_Face* Face() const { return ftFace;}
          
          /**
           * Sets the char size for the current face.
           *
           * This doesn't guarantee that the size was set correctly. Clients
           * should check errors.
           *
           * @param size      the face size in points (1/72 inch)
           * @param res       the resolution of the target device.
           * @return          <code>FTSize</code> object
           */
          const FTSize& Size( const unsigned int size, const unsigned int res);
  
          /**
           * Get the number of character maps in this face.
           *
           * @return character map count.
           */
          unsigned int CharMapCount();
  
          /**
           * Get a list of character maps in this face.
           *
           * @return pointer to the first encoding.
           */
          FT_Encoding* CharMapList();
          
          /**
           * Gets the kerning vector between two glyphs
           */
          FTPoint KernAdvance( unsigned int index1, unsigned int index2);
  
          /**
           * Loads and creates a Freetype glyph.
           */
          FT_GlyphSlot Glyph( unsigned int index, FT_Int load_flags);
  
          /**
           * Gets the number of glyphs in the current face.
           */
          unsigned int GlyphCount() const { return numGlyphs;}
  
          /**
           * Queries for errors.
           *
           * @return  The current error code.
           */
          FT_Error Error() const { return err; }
          
      private:
          /**
           * The Freetype face
           */
          FT_Face* ftFace;
  
          /**
           * The size object associated with this face
           */
          FTSize  charSize;
          
          /**
           * The number of glyphs in this face
           */
          int numGlyphs;
          
          FT_Encoding* fontEncodingList;
  
          /**
           * This face has kerning tables
           */
           bool hasKerningTable;
  
          /**
           * Current error code. Zero means no error.
           */
          FT_Error err;
  };
  
  
  #endif  //  __FTFace__
  

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