//##################################################################################################
//
//   Custom Visualization Core library
//   Copyright (C) 2011-2012 Ceetron AS
//    
//   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. 
//
//##################################################################################################

#pragma once

#include "cvfRenderState.h"

namespace cvf {



//==================================================================================================
//
// Controls OpenGL point size, glPointSize() and glEnable()/glDisable() with GL_PROGRAM_POINT_SIZE
//
//==================================================================================================
class RenderStatePoint : public RenderState
{
public:
    enum Mode
    {
        FIXED_SIZE,     ///< Fixed diameter of raserized points (as specified by point size/glPointSize())
        PROGRAM_SIZE    ///< Point size will be specified using GLSL and the gl_PointSize built-in variable
    };

public:
    RenderStatePoint(Mode sizeMode = FIXED_SIZE);

    void            setMode(Mode sizeMode);
    Mode            mode() const;
    void            enablePointSprite(bool enable);
    bool            isPointSpriteEnabled() const;
    void            setSize(float pointSize);
    float           size() const;

    virtual void    applyOpenGL(OpenGLContext* oglContext) const;

private:
    Mode    m_sizeMode;
    bool    m_pointSprite;
    float   m_pointSize;
};


}  // namespace cvf
