kc3-lang/ftgl/include/FTTextureGlyph.h

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• Hash : d58c7be1
  Author :
  Date : 2001-11-12T22:28:36
  

  Refactored texture fonts to ba able to load glyphs on the fly...uses glTexSubImage2D. They are now more in line with the rest of the fonts.

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• 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 id the texture that this glyph will be
  		 *					drawn in
  		 * @param xOffset	The x offset into the parent texture to draw
  		 *					this glyph
  		 * @param yOffset	The y offset into the parent texture to draw
  		 *					this glyph
  		 * @param width		The width of the parent texture
  		 * @param height	The height (number of rows) of the parent texture
  		 */
  		FTTextureGlyph( FT_Glyph glyph, int id, int xOffset, int yOffset, GLsizei width, GLsizei height);
  
  		/**
  		 * 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);
  		
  	private:
  		/**
  		 * Pointer to the 'image' data
  		 */
  		unsigned char* data;
  		 
  		/**
  		 * 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;
  
  		/**
  		 * The texture index of the currently active texture
  		 *
  		 * We call glGetIntegerv( GL_TEXTURE_2D_BINDING, activeTextureID);
  		 * to get the currently active texture to try to reduce the number
  		 * of texture bind operations
  		 */
  		GLint activeTextureID;
  		
  };
  
  
  #endif	//	__FTTextureGlyph__
  

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