//##################################################################################################
//
//   Custom Visualization Core library
//   Copyright (C) 2011-2013 Ceetron AS
//
//   This library may be used under the terms of either the GNU General Public License or
//   the GNU Lesser General Public License as follows:
//
//   GNU General Public License Usage
//   This library is free software: you can redistribute it and/or modify
//   it under the terms of the GNU General Public License as published by
//   the Free Software Foundation, either version 3 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 General Public License at <<http://www.gnu.org/licenses/gpl.html>>
//   for more details.
//
//   GNU Lesser General Public License Usage
//   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 at <<http://www.gnu.org/licenses/lgpl-2.1.html>>
//   for more details.
//
//##################################################################################################


#pragma once

#include "cvfObject.h"
#include "cvfOpenGLContextGroup.h"

namespace cvf {

class OpenGLResourceManager;
class OpenGLCapabilities;


//==================================================================================================
//
// Encapsulates an OpenGL rendering context
//
//==================================================================================================
class OpenGLContext : public Object
{
public:
    OpenGLContext(OpenGLContextGroup* contextGroup);
    virtual ~OpenGLContext();

    bool                        isContextValid() const;
    virtual bool                initializeContext();
    virtual void                shutdownContext();

    virtual void                makeCurrent() = 0;
    virtual bool                isCurrent() const = 0;

    OpenGLContextGroup*         group();
    const OpenGLContextGroup*   group() const;
    OpenGLResourceManager*      resourceManager();
    const OpenGLCapabilities*   capabilities();

private:
    OpenGLContextGroup*         m_contextGroup;         // Raw pointer (to avoid circular reference) to the context group that this context belongs to. 
    bool                        m_isValid;              // Will be set to true after successful initialization

    friend class OpenGLContextGroup;
};


#define CVF_LOG_RENDER_ERROR(OGL_CTX_PTR, THE_MESSAGE)  CVF_LOG_ERROR( (OGL_CTX_PTR->group()->logger()), (THE_MESSAGE))


}