source: code/branches/overlay/src/orxonox/gui/OgreCEGUITexture.h @ 2225

/************************************************************************
    filename:   OgreCEGUITexture.h
    created:    11/5/2004
    author:             Paul D Turner
    
    purpose:    Interface to Texture implemented via Ogre engine
*************************************************************************/
/*************************************************************************
    Crazy Eddie's GUI System (http://www.cegui.org.uk)
    Copyright (C)2004 - 2005 Paul D Turner (paul@cegui.org.uk)

    This library 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 2.1 of the License, or (at your option) any later version.

    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
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*************************************************************************/
#ifndef _OgreCEGUITexture_H__
#define _OgreCEGUITexture_H__

#include <CEGUIBase.h>
#include <CEGUIRenderer.h>
#include <CEGUITexture.h>
#include "OgreCEGUIRenderer.h"

// Start of CEGUI namespace section
namespace CEGUI
{
/*!
\brief
    Texture class that is created by OgreCEGUIRenderer objects
*/
class _OgrePrivate OgreCEGUITexture : public Texture
{
private:
    /*************************************************************************
        Friends (to allow construction and destruction)
    *************************************************************************/
    friend      Texture* OgreCEGUIRenderer::createTexture(void);
    friend      Texture* OgreCEGUIRenderer::createTexture(const String& filename, const String& resourceGroup);
    friend      Texture* OgreCEGUIRenderer::createTexture(float size);
    friend      void     OgreCEGUIRenderer::destroyTexture(Texture* texture);


    /*************************************************************************
        Construction & Destruction (by Renderer object only)
    *************************************************************************/
    OgreCEGUITexture(Renderer* owner);
    virtual ~OgreCEGUITexture(void);

public:
    /*!
    \brief
        Returns the current pixel width of the texture

    \return
        ushort value that is the current width of the texture in pixels
    */
    virtual     ushort  getWidth(void) const            {return d_width;}


    /*!
    \brief
        Returns the current pixel height of the texture

    \return
        ushort value that is the current height of the texture in pixels
    */
    virtual     ushort  getHeight(void) const           {return d_height;}


    /*!
    \brief
        Loads the specified image file into the texture.  The texture is resized as required to hold the image.

    \param filename
        The filename of the image file that is to be loaded into the texture

    \return
        Nothing.
    */
    virtual void        loadFromFile(const String& filename, const String& resourceGroup);


    /*!
    \brief
        Loads (copies) an image in memory into the texture.  The texture is resized as required to hold the image.
    
    \param buffPtr
        Pointer to the buffer containing the image data
    
    \param buffWidth
        Width of the buffer (in pixels as specified by \a pixelFormat )
    
    \param buffHeight
        Height of the buffer (in pixels as specified by \a pixelFormat )
    
    \param pixelFormat
    PixelFormat value describing the format contained in \a buffPtr
    
    \return
        Nothing.
    */
    virtual void        loadFromMemory(const void* buffPtr, uint buffWidth, uint buffHeight, PixelFormat pixelFormat);


    /*!
    \brief
        Return a pointer to the internal Ogre::Texture object

    \return
        Pointer to the Ogre::Texture object currently being used by this Texture object
    */
    Ogre::TexturePtr    getOgreTexture(void) const              {return d_ogre_texture;}


    /*!
    \brief
        set the size of the internal Ogre texture.  Previous Ogre texture is lost.

    \param size
        pixel size of the new internal texture.  This will be rounded up to a power of 2.

    \return
        Nothing.
    */
    void        setOgreTextureSize(uint size);


    /*!
    \brief
        Set the internal Ogre::TexturePtr object.

    \param texture
        Reference to an Ogre::TexturePtr object that is to be used by this Texture object.

    \return
        Nothing.
    */
    void        setOgreTexture(Ogre::TexturePtr& texture);


private:
    /*************************************************************************
        Implementation Functions
    *************************************************************************/
    // safely free Ogre::Texture texture (can be called multiple times with no ill effect)
    void        freeOgreTexture(void);

    // return a Ogre::string that contains a unique name.
    Ogre::String        getUniqueName(void);


    /*************************************************************************
        Implementation Data
    *************************************************************************/
    static      uint32          d_texturenumber;        //!< Counter used to provide unique texture names.

    Ogre::TexturePtr            d_ogre_texture;         //!< The 'real' texture.

    ushort                                      d_width;                        //!< cached width of the texture
    ushort                                      d_height;                       //!< cached height of the texture

    bool        d_isLinked;             //!< True if we are linked to a texture we did not actually create.
};


} // End of  CEGUI namespace section


#endif  // end of guard _OgreCEGUITexture_H__