KeosFontManager.h

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/*
 * This source file is part of KEOS (Free 3D Engine)
 * For the latest info, see http://www.keosengine.org/
 * E-mails : thierry.vouriot@keosengine.org, yeri@keosengine.org
 *
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free Software
 * Foundation; either version 2 of the License, or (at your option) any later
 * version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
 * Place - Suite 330, Boston, MA 02111-1307, USA, or go to
 * http://www.gnu.org/copyleft/lesser.txt.
 *
 */
#ifndef KEOS_FONTMANAGER_H
#define KEOS_FONTMANAGER_H

#include "KeosPrerequisites.h"
#include "KeosSingleton.h"
#include "KeosDeclaration.h"
#include "KeosTexture.h"
#include "KeosBuffer.h"

namespace Keos
{
  //-----------------------------------------------------------------------
  class KEOS_EXPORT CFontManager : public CSingleton<CFontManager>
  {
    friend class CSingleton<CFontManager>;

  public :

    void LoadFont(const String& strFontFile, const String& strFontName, int nQuality = 16);

    void UnloadFonts();

    void DrawString(const CGraphicString& String);

    TVector2I GetStringPixelSize(const CGraphicString& String);

    size_t GetFontHeight(const String& strFontName);

  private :

    CFontManager();

    ~CFontManager();

    void Initialize();

    struct TVertex
    {
      TVector3F   Position;     
      ulong       Diffuse;      
      TVector2F   TexCoords;    
    };

    typedef ushort TIndex;

    struct Glyph
    {
      float Tex_x1, Tex_y1, Tex_x2;
      size_t Advance;
    };

    struct TFont
    {
      CTexture Texture;
      Glyph* Glyphs;
      Glyph* GlyphsTable[256];
      size_t LineHeight;
      float TextureLineHeight;
    };

    typedef std::map<String, TFont> TFontsMap;

    static const unsigned int NbCharMax = 512;

    TFontsMap        m_Fonts;        
    CBuffer<TVertex> m_VertexBuffer; 
    CBuffer<TIndex>  m_IndexBuffer;  
    CDeclarationPtr  m_Declaration;  
  };

} // namespace Keos

#endif // KEOS_FONTMANAGER_H

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