TextureManager.h

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/* -*- c++ -*- */
/////////////////////////////////////////////////////////////////////////////
//
// TextureManager.h  -- Copyright (c) 2006 David Henry
// last modification: feb. 21, 2006
//
// This code is licenced under the MIT license.
//
// This software is provided "as is" without express or implied
// warranties. You may freely copy and compile this source into
// applications you distribute provided that the copyright text
// below is included in the resulting source code.
//
// Definitions of a texture manager class.
//
/////////////////////////////////////////////////////////////////////////////

#ifndef __TEXTUREMANAGER_H__
#define __TEXTUREMANAGER_H__

#include "DataManager.h"
#include "Texture.h"


/////////////////////////////////////////////////////////////////////////////
//
// class Texture2DManager -- a texture manager which can register/unregister
// Texture2D objects.  Destroy all registred textures at death.
//
// The texture manager is a singleton.
//
/////////////////////////////////////////////////////////////////////////////

class Texture2DManager :
  public DataManager<Texture2D, Texture2DManager>
{
  friend class DataManager<Texture2D, Texture2DManager>;

public:
  // Public interface

  // Load and register a texture.  If the texture has already been
  // loaded previously, return it instead of loading it.
  Texture2D *load (const string &filename)
  {
    // Look for the texture in the registry
    Texture2D *tex = request (filename);

    // If not found, load the texture
    if (tex == NULL)
      {
        tex = new Texture2D (filename);

        // If the texture creation failed, delete the
        // unusable object and return NULL
        if (tex->fail ())
          {
            delete tex;
            tex = NULL;
          }
        else
          {
            // The texture has been successfully loaded,
            // register it.
            registerObject (tex->name (), tex);
          }
      }

    return tex;
  }
};

#endif // __TEXTUREMANAGER_H__