#include "GlRenderSystem/PrecompiledHeader.hpp"

#include "GlRenderSystem/GlWindowRenderer.hpp"
#include "GlRenderSystem/GlContext.hpp"
#include "GlRenderSystem/GlRenderSystem.hpp"
#include "GlRenderSystem/GlShaderProgram.hpp"
#include "GlRenderSystem/OpenGl.hpp"
#include "GlRenderSystem/GlFrameBuffer.hpp"

#include <Castor3D/Viewport.hpp>

using namespace GlRender;
using namespace Castor3D;
using namespace Castor;

GlWindowRenderer :: GlWindowRenderer( OpenGl & p_gl, GlRenderSystem * p_pRenderSystem )
	:	WindowRenderer	( p_pRenderSystem	)
	,	m_gl			( p_gl				)
{
}

GlWindowRenderer :: ~GlWindowRenderer()
{
}

bool GlWindowRenderer :: SetCurrent()
{
	bool l_bReturn = m_target->GetContext()->IsInitialised();

	if( l_bReturn )
	{
		m_target->GetContext()->SetCurrent();
	}

	return l_bReturn;
}

void GlWindowRenderer :: EndCurrent()
{
	if( m_target->GetContext()->IsInitialised() )
	{
		m_target->GetContext()->EndCurrent();
	}
}

bool GlWindowRenderer :: BeginScene()
{
	SetCurrent();
	return m_pfnBeginScene();
}

bool GlWindowRenderer :: EndScene()
{
	return m_pfnEndScene();
}

void GlWindowRenderer :: EndRender()
{
	if( m_target->GetContext()->IsInitialised() )
	{
		m_target->GetContext()->SwapBuffers();
	}

	EndCurrent();
}

bool GlWindowRenderer :: DoInitialise()
{
	Logger::LogMessage( cuT( "GlWindowRenderer :: Initialise" ) );

	if( m_gl.GetVersion() < 30 )
	{
		if( m_target->GetViewportType() != eVIEWPORT_TYPE_3D )
		{
//			m_gl.Color3f( 1.0f, 1.0f, 1.0f );
		}

		m_pfnBeginScene = PBeginSceneFunction( [&]()
		{
			bool l_bReturn = true;

			l_bReturn &= m_gl.ShadeModel(	eGL_SHADE_MODEL_SMOOTH );
			l_bReturn &= m_gl.LightModel(	eGL_LIGHT_MODEL_PARAM_LOCAL_VIEWER,		eGL_TRUE										);
			l_bReturn &= m_gl.LightModel(	eGL_LIGHT_MODEL_PARAM_COLOR_CONTROL,	eGL_LIGHT_MODEL_PARAM_SEPARATE_SPECULAR_COLOR	);
			l_bReturn &= m_gl.Enable( eGL_TWEAK_NORMALIZE );

			if( m_target->GetViewportType() == eVIEWPORT_TYPE_3D )
			{
				l_bReturn &= m_gl.Enable( eGL_TWEAK_LIGHTING );
			}
			else
			{
				l_bReturn &= m_gl.Disable( eGL_TWEAK_LIGHTING );
			}

			return l_bReturn;
		} );
	}
	else
	{
		m_pfnBeginScene = PBeginSceneFunction( [&]()
		{
			return true;
		} );
	}

	m_pfnEndScene = PEndSceneFunction( [&]()
	{
		return m_gl.HasFbo();
	} );

	return true;
}

void GlWindowRenderer :: DoCleanup()
{
}