kc3-lang/ftgl/include/FTTextureGlyph.h

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• Hash : 141112c4
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  Date : 2008-04-12T22:44:48
  

  * Add licensing information to all files in the library.

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• include/FTTextureGlyph.h

• /*
   * FTGL - OpenGL font library
   *
   * Copyright (c) 2001-2004 Henry Maddocks <ftgl@opengl.geek.nz>
   *
   * Permission is hereby granted, free of charge, to any person obtaining
   * a copy of this software and associated documentation files (the
   * "Software"), to deal in the Software without restriction, including
   * without limitation the rights to use, copy, modify, merge, publish,
   * distribute, sublicense, and/or sell copies of the Software, and to
   * permit persons to whom the Software is furnished to do so, subject to
   * the following conditions:
   * 
   * The above copyright notice and this permission notice shall be
   * included in all copies or substantial portions of the Software.
   * 
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
   * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
   * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
   * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
   * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
   *
   * Alternatively, you can redistribute and/or modify this software under
   * the terms of the GNU Lesser General Public License as published by
   * the Free Software Foundation; either version 2.1 of the License,
   * or (at your option) any later version.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this software; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA.
   */
  
  #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 of 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_GlyphSlot 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 const FTPoint& Render( const FTPoint& pen);
          
          /**
           * Reset the currently active texture to zero to get into a known state before
           * drawing a string. This is to get round possible threading issues.
           */
          static void ResetActiveTexture(){ activeTextureID = 0;}
          
      private:
          /**
           * The width of the glyph 'image'
           */
          int destWidth;
  
          /**
           * The height of the glyph 'image'
           */
          int destHeight;
  
          /**
           * Vector from the pen position to the topleft corner of the pixmap
           */
          FTPoint pos;
          
          /**
           * 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 keep track of the currently active texture to try to reduce the number
           * of texture bind operations.
           */
          static GLint activeTextureID;
          
  };
  
  
  #endif  //  __FTTextureGlyph__
  

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