kc3-lang/ftgl/include/FTGlyphContainer.h

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• Hash : 789b1cf3
  Author :
  Date : 2001-11-04T04:33:30
  

  Changes to allow glyphs to be loaded on the fly... MakeGlyphList is no longer pure virtual. New function MakeGlyph is pure virtual Open now has a flag for pre-cache GlyphContainer builds a list of null pointers advance and render functions check if glyph has been loaded and loads it if it has'nt

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• include/FTGlyphContainer.h

• #ifndef		__FTGlyphContainer__
  #define		__FTGlyphContainer__
  
  #include "FTGL.h"
  
  #include <vector>
  
  #include <ft2build.h>
  #include FT_FREETYPE_H
  #include FT_GLYPH_H
  
  class FTFace;
  class FTGlyph;
  
  using namespace std;
  
  /**
   * FTGlyphContainer holds the post processed FTGlyph objects.
   *
   * @see FTGlyph
   */
  class FTGL_EXPORT FTGlyphContainer
  {
  	public:
  		/**
  		 * Constructor
  		 *
  		 * @param face		The Freetype face
  		 * @param numGlyphs	the number of glyphs in this face
  		 * @param p			A flag to indicate preprocessing of glyphs.
  		 *					Not used.
  		 */
  		FTGlyphContainer( FTFace* face, unsigned int numGlyphs, bool p = false);
  
  		/**
  		 * Destructor
  		 */
  		virtual ~FTGlyphContainer();
  
  		/**
  		 * Adds a glyph to this glyph list.
  		 *
  		 * @param glyph		
  		 * @return			<code>true</code>
  		 */
  		bool Add( FTGlyph* tempGlyph, unsigned int g);
  
  		/**
  		 * Get a glyph from the glyph list
  		 *
  		 * @param c	The char code of the glyph NOT the glyph index		
  		 * @return	An FTGlyph or <code>null</code> is it hasn't been
  		 * loaded.
  		 */
  		FTGlyph* Glyph( unsigned int c) const;
  
  		/**
  		* Returns the kerned advance width for a glyph.
  		*
  		* @param index	glyph index of the character
  		* @param next	the next glyph in a string
  		* @return 		advance width
  		*/
  		float Advance( unsigned int index, unsigned int next);
  		
  		/**
  		 * renders a character
  		 * @param index	the glyph to be rendered
  		 * @param next	the next glyph in the string. Used for kerning.
  		 * @param pen	the position to render the glyph
  		 * @return 		The distance to advance the pen position after rendering
  		 */
  		FT_Vector& render( unsigned int index, unsigned int next, FT_Vector pen);
  		
  		/**
  		 * Queries the Font for errors.
  		 *
  		 * @return	The current error code.
  		 */
  		virtual FT_Error Error() const { return err;}
  
  	private:
  		/**
  		 * A flag to indicate preprocessing of glyphs. Not used.
  		 */
  		bool preCache;
  
  		/**
  		 * How meny glyphs are stored in this container
  		 */
  		int numGlyphs;
  
  		/**
  		 * The current Freetype face
  		 */
  		FTFace* face;
  
  		/**
  		 * The kerning vector for the current pair of glyphs
  		 */
  		FT_Vector kernAdvance;
  
  		/**
  		 * The advance for the glyph being rendered
  		 */
  		float advance;
  
  		/**
  		 * A structure to hold the glyphs
  		 */
  		vector<FTGlyph*> glyphs;
  
  		/**
  		 * Current error code. Zero means no error.
  		 */
  		FT_Error err;
  		
  };
  
  
  #endif	//	__FTGlyphContainer__
  

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