//========= Copyright © 1996-2002, Valve LLC, All rights reserved. ============
//
// Purpose: 
//
// $NoKeywords: $
//=============================================================================

#include "BaseVSShader.h"
#include "ssao_combine_vs30.inc"
#include "ssao_combine_ps30.inc"

// memdbgon must be the last include file in a .cpp file!!!
#include "tier0/memdbgon.h"


BEGIN_VS_SHADER_FLAGS( SSAOCOMBINE, "Help for SSAO Combine", SHADER_NOT_EDITABLE )
	BEGIN_SHADER_PARAMS
		SHADER_PARAM( SSAOTEXTURE, SHADER_PARAM_TYPE_TEXTURE, "_rt_SSAO", "SSAO" )
		SHADER_PARAM( BASETEXTURE, SHADER_PARAM_TYPE_TEXTURE, "_rt_FullFrameFB", "Framebuffer" )
	END_SHADER_PARAMS

	SHADER_INIT_PARAMS()
	{
		SET_FLAGS2( MATERIAL_VAR2_NEEDS_FULL_FRAME_BUFFER_TEXTURE );
	}

	SHADER_FALLBACK
	{
		return 0;
	}

	SHADER_INIT
	{
		if( params[SSAOTEXTURE]->IsDefined() )
		{
			LoadTexture( SSAOTEXTURE );
		}

		if( params[BASETEXTURE]->IsDefined() )
		{
			LoadTexture( BASETEXTURE );
		}
	}

	SHADER_DRAW
	{
		SHADOW_STATE
		{
			pShaderShadow->EnableDepthWrites( false );

			pShaderShadow->VertexShaderVertexFormat( VERTEX_POSITION, 1, 0, 0 );
			
			DECLARE_STATIC_VERTEX_SHADER(ssao_combine_vs30);
			SET_STATIC_VERTEX_SHADER( ssao_combine_vs30 );

			pShaderShadow->EnableTexture( SHADER_SAMPLER0, true );
			pShaderShadow->EnableTexture( SHADER_SAMPLER1, true );

			DECLARE_STATIC_PIXEL_SHADER( ssao_combine_ps30 );
			SET_STATIC_PIXEL_SHADER( ssao_combine_ps30 );
		}

		DYNAMIC_STATE
		{
			BindTexture( SHADER_SAMPLER0, SSAOTEXTURE, -1 );
			BindTexture( SHADER_SAMPLER1, BASETEXTURE, -1 );

			DECLARE_DYNAMIC_VERTEX_SHADER( ssao_combine_vs30 );
			SET_DYNAMIC_VERTEX_SHADER( ssao_combine_vs30 );

			DECLARE_DYNAMIC_PIXEL_SHADER( ssao_combine_ps30 );
			SET_DYNAMIC_PIXEL_SHADER( ssao_combine_ps30 );
		}
		Draw();
	}
END_SHADER