Texture.hpp

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/****************************************************************************\
 *                                 VRVis                                    *
 *                      http://vrvis.sourceforge.net                        *
 *                       (C) 2004 by Alex Loeffler                          *
 *                 mailto:aloeffler@users.sourceforge.net                   *
 ****************************************************************************
 *                                License                                   *
 *                                                                          *
 * This library is free software; you can redistribute it and/or modify it  *
 * under the terms of the GNU Library General Public License as published   *
 * by the Free Software Foundation, version 2.                              *
 *                                                                          *
 * This library 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        *
 * Library General Public License for more details.                         *
 *                                                                          *
 * You should have received a copy of the GNU Library General Public        *
 * License along with this library; if not, write to the Free Software      *
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.                *
\****************************************************************************/

#ifndef TEXTURE_HPP
#define TEXTURE_HPP

#include <vrj/Draw/OGL/GlContextData.h>
#include "ColorDataDefs.hpp"

#include "Common.hpp"

namespace vrvis
{

class Texture
{
  // ================================================================== PUBLIC

  public:

  // ----------------------------------------------- Constructor & Destructor.

  Texture(const int           cOriginX,
          const int           cOriginY,
          const int           cWidth,
          const int           cHeight,
          const int           cMaxValidX,
          const int           cMaxValidY,
          const ColorDataMap& crColorDataMap);

  ~Texture(void);

  // -------------------------------------------------------------- Accessors.

  int getOriginX(void) const;
  int getOriginY(void) const;

  int getSizeX(void) const;
  int getSizeY(void) const;

  int getMaxValidX(void) const;
  int getMaxValidY(void) const;

  double getLowerLimit(void) const;
  double getUpperLimit(void) const;

  ushort* getTexData(void) const;

  void getTexCoords(float& rMinX, float& rMaxX, float& rMinY, float& rMaxY);

  // --------------------------------------------------------------- Mutators.

  void setTexCoords(const float cMinX,
                    const float cMaxX,
                    const float cMinY,
                    const float cMaxY);

  void setLimits(const double cLowerLimit, const double cUpperLimit);

  // -------------------------------------------- Texture Data Initialization.

  void fill(void);
  void createGLTexture(void);

  // ---------------------------------------------- Texture Data Manipulation.

  void calculateTextureData(void);
  void rebuildGLTexture(int offsetX =  0,
                        int offsetY =  0,
                        int width   = -1,
                        int height  = -1);

  // ---------------------------------------------------------------- Drawing.

  void drawTexturedQuad(const float cDrawUnitX, const float cDrawUnitY);

  // --------------------------------------------------- Maximum Texture Size.

  static int getMaxTexSize(void);

  // ================================================================= PRIVATE

  private:

  // ---------------------------------------------------------------- Friends.

  friend class Input;

  // ---------------------------------------------------- Member Construction.

  static void setMaxTexSize(int maxTexSize);

  // ---------------------------------------------------------------- Members.

  const int mcOriginX;
  const int mcOriginY;

  const int mcSizeX;      
  const int mcSizeY;      

  const int mcMaxValidX;  
  const int mcMaxValidY;  

  float mTexCoordMinX;    
  float mTexCoordMaxX;    
  float mTexCoordMinY;    
  float mTexCoordMaxY;    

  double mLowerLimit;     
  double mUpperLimit;     

  const ColorDataMap& mcrColorDataMap;

  ushort* mpTexData;

  vrj::GlContextData<uint> mTexID;

  // --------------------------------------------------------- Static Members.

  static double sInitialLowerLimit;  
  static double sInitialUpperLimit;  

  static int sMaxTexSize;
};

}  // End namespace.

#endif // TEXTURE_HPP

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