kc3-lang/ftgl/include/FTTextureGlyph.h

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• Hash : 9013e3ec
  Author :
  Date : 2002-06-20T08:22:06
  

  Changes for VTK Removed tabs Removed mmgr Optimisations for loading pixel based fonts Minor changes

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• include/FTTextureGlyph.h

• #ifndef     __FTTextureGlyph__
  #define     __FTTextureGlyph__
  
  
  #include <ft2build.h>
  #include FT_FREETYPE_H
  #include FT_GLYPH_H
  
  #include "FTGL.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:
          /**
           * 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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