//##################################################################################################
//
//   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"

namespace cvf {

class OpenGLContext;


//==================================================================================================
//
// Base class for storing and changing OpenGL state attributes
//
//==================================================================================================
class RenderState : public Object
{
public:
    enum Type
    {
        BLENDING,               // Must start at 0, used for indexing in RenderStateTracker
        COLOR_MASK,             
        CULL_FACE,
        DEPTH,
        FRONT_FACE,
        LINE,
        POINT,
        POLYGON_MODE,
        POLYGON_OFFSET,
        STENCIL,
        TEXTURE_BINDINGS,

#ifndef CVF_OPENGL_ES
        LIGHTING_FF,            //Fixed function
        MATERIAL_FF,            //Fixed function
        NORMALIZE_FF,           //Fixed function
        TEXTURE_MAPPING_FF,     //Fixed function
        CLIP_PLANES_FF,         //Fixed function
#endif

        COUNT                   // Must be the last entry
    };

public:
    virtual ~RenderState();

    Type            type() const;
    virtual void    applyOpenGL(OpenGLContext* oglContext) const = 0;
    virtual bool    isFixedFunction() const;

protected:
    RenderState(Type type);

private:
    Type   m_stateType;
};




}  // namespace cvf