/***********************************************************************
    created:    Wed, 8th Feb 2012
    author:     Lukas E Meindl (based on code by Paul D Turner)
*************************************************************************/
/***************************************************************************
     Copyright (C) 2004 - 2012 Paul D Turner & The CEGUI Development Team

     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 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.
 ***************************************************************************/
#ifndef _CEGUIOpenGL3FBOTextureTarget_h_
#define _CEGUIOpenGL3FBOTextureTarget_h_

#include "CEGUI/RendererModules/OpenGL/TextureTarget.h"
#include "CEGUI/RendererModules/OpenGL/GL.h"
#include "../../Rect.h"


#if defined(_MSC_VER)
#   pragma warning(push)
#   pragma warning(disable : 4250)
#endif

// Start of CEGUI namespace section
namespace CEGUI
{
  class OpenGL3Texture;
  class OpenGL3Renderer;

//! ~OpenGL3FBOTextureTarget - allows rendering to an OpenGL texture via FBO.
  class OPENGL_GUIRENDERER_API OpenGL3FBOTextureTarget : public OpenGLTextureTarget
  {
  public:
    OpenGL3FBOTextureTarget(OpenGL3Renderer &owner);
    virtual ~OpenGL3FBOTextureTarget();

    // overrides from OpenGL3RenderTarget
    void activate();
    void deactivate();
    // implementation of TextureTarget interface
    void clear();
    void declareRenderSize(const Sizef &sz);
    // specialise functions from OpenGL3TextureTarget
    void grabTexture();
    void restoreTexture();

  protected:
    //! default size of created texture objects
    static const float DEFAULT_SIZE;

    //! allocate and set up the texture used with the FBO.
    void initialiseRenderTexture();
    //! resize the texture
    void resizeRenderTexture();
    //! Checks for OpenGL framebuffer completeness
    void checkFramebufferStatus();

    //! Frame buffer object.
    gl::GLuint d_frameBuffer;
    //! Frame buffer object that was bound before we bound this one
    gl::GLuint d_previousFrameBuffer;
  };

} // End of  CEGUI namespace section

#if defined(_MSC_VER)
#   pragma warning(pop)
#endif

#endif  // end of guard _CEGUIOpenGLFBOTextureTarget_h_
