kc3-lang/ftgl/include/FTGlyphContainer.h

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• Hash : 56289ce6
  Author :
  Date : 2003-06-08T01:09:17
  

  Refactored FTGlyphContainer & FTCharmap. They now store FTGlyphs sequentially rather than by glyph index.

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• include/FTGlyphContainer.h

• #ifndef     __FTGlyphContainer__
  #define     __FTGlyphContainer__
  
  #include <ft2build.h>
  #include FT_FREETYPE_H
  #include FT_GLYPH_H
  
  #include "FTGL.h"
  #include "FTBBox.h"
  #include "FTPoint.h"
  #include "FTVector.h"
  
  class FTFace;
  class FTGlyph;
  class FTCharmap;
  
  /**
   * FTGlyphContainer holds the post processed FTGlyph objects.
   *
   * @see FTGlyph
   */
  class FTGL_EXPORT FTGlyphContainer
  {
          typedef FTVector<FTGlyph*> GlyphVector;
      public:
          /**
           * Constructor
           *
           * @param face      The Freetype face
           */
          FTGlyphContainer( FTFace* face);
  
          /**
           * Destructor
           */
          ~FTGlyphContainer();
  
          /**
           * Sets the character map for the face.
           *
           * @param encoding      the Freetype encoding symbol. See above.
           * @return              <code>true</code> if charmap was valid
           *                      and set correctly
           */
          bool CharMap( FT_Encoding encoding);
  
          /**
           * Get the glyph index of the input character.
           *
           * @param characterCode The character code of the requested glyph in the
           *                      current encoding eg apple roman.
           * @return      The glyph index for the character.
           */
          unsigned int GlyphIndex( const unsigned int characterCode ) const;
          
          /**
           * Adds a glyph to this glyph list.
           *
           * @param glyph         The FTGlyph to be inserted into the container
           * @param characterCode The char code of the glyph NOT the glyph index.
           */
          void Add( FTGlyph* glyph, const unsigned int characterCode);
  
          /**
           * Get a glyph from the glyph list
           *
           * @param characterCode The char code of the glyph NOT the glyph index      
           * @return              An FTGlyph or <code>null</code> is it hasn't been
           * loaded.
           */
          const FTGlyph* const Glyph( const unsigned int characterCode) const;
  
          /**
           * Get the bounding box for a character.
           * @param characterCode The char code of the glyph NOT the glyph index      
           */
          FTBBox BBox( const unsigned int characterCode) const;
          
          /**
          * Returns the kerned advance width for a glyph.
          *
          * @param characterCode     glyph index of the character
          * @param nextCharacterCode the next glyph in a string
          * @return                  advance width
          */
          float Advance( const unsigned int characterCode, const unsigned int nextCharacterCode);
          
          /**
           * Renders a character
           * @param characterCode      the glyph to be Rendered
           * @param nextCharacterCode  the next glyph in the string. Used for kerning.
           * @param penPosition        the position to Render the glyph
           * @return                   The distance to advance the pen position after Rendering
           */
          FTPoint Render( const unsigned int characterCode, const unsigned int nextCharacterCode, FTPoint penPosition);
          
          /**
           * Queries the Font for errors.
           *
           * @return  The current error code.
           */
          FT_Error Error() const { return err;}
  
      private:
          /**
           * The FTGL face
           */
          FTFace* face;
  
          /**
           * The Character Map object associated with the current face
           */
          FTCharmap* charMap;
  
          /**
           * A structure to hold the glyphs
           */
          GlyphVector glyphs;
  
          /**
           * Current error code. Zero means no error.
           */
          FT_Error err;
  };
  
  
  #endif  //  __FTGlyphContainer__
  

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