kc3-lang/ftgl/include/FTTextureGlyph.h

Branch : - branch - master - tag -

• Show log

  Commit

• Author : henry
  Date : 2001-10-14 21:52:24
  Hash : 90dbbac7
  Message : Updated comments

• include/FTTextureGlyph.h

• #ifndef		__FTTextureGlyph__
  #define		__FTTextureGlyph__
  
  #include "FTGL.h"
  
  #include <ft2build.h>
  #include FT_FREETYPE_H
  #include FT_GLYPH_H
  
  #include "FTGlyph.h"
  
  
  /**
   * FTTextureGlyph is a specialisation of FTGlyph for creating texture
   * glyphs.
   * 
   * @see FTGlyphContainer
   *
   */
  class FTGL_EXPORT FTTextureGlyph : public FTGlyph
  {
  	public:
  		/**
  		 * Constructor
  		 *
  		 * @param glyph		The Freetype glyph to be processed
  		 * @param id		The index of the texture that this glyph will
  		 *					be drawn in
  		 * @param data		A pointer to the texture memory
  		 * @param stride	The stride of the texture memory
  		 * @param height	The height (number of rows) of the texture memory
  		 * @param u			The texture co-ord for this glyph
  		 * @param v			The texture co-ord for this glyph
  		 */
  		FTTextureGlyph( FT_Glyph glyph, int id, unsigned char* data, int stride, int height, float u, float v);
  
  		/**
  		 * Destructor
  		 */
  		virtual ~FTTextureGlyph();
  
  		/**
  		 * Renders this glyph at the current pen position.
  		 *
  		 * @param pen	The current pen position.
  		 * @return		The advance distance for this glyph.
  		 */
  		virtual float Render( const FT_Vector& pen);
  		
  		/**
  		 * The texture index of the currently active texture
  		 *
  		 * Because a a full set of glyphs may not fit on one glyph we need
  		 * to keep track of the current active texture to try to reduce the
  		 * number of texture bind operations
  		 */
  		static int activeTextureID;
  		
  	private:
  		/**
  		 * The width of the glyph 'image'
  		 */
  		int destWidth;
  
  		/**
  		 * The height of the glyph 'image'
  		 */
  		int destHeight;
  
  		/**
  		 * The number of greys or bit depth of the image
  		 */
  		int numGreys;
  		
  		/**
  		 * A structure to hold the uv co-ords.
  		 */
  		struct FTPoint
  		{
  			float x;
  			float y;
  		};
  
  		/**
  		 * The texture co-ords of this glyph within the texture.
  		 */
  		FTPoint uv[2];
  		
  		/**
  		 * The texture index that this glyph is contained in.
  		 */
  		int glTextureID;
  };
  
  
  #endif	//	__FTTextureGlyph__