//===== Copyright © 1996-2005, Valve Corporation, All rights reserved. ======//
//
// Purpose: 
//
// $Header: $
// $NoKeywords: $
//===========================================================================//

#include "BaseVSShader.h"
//#include "cloak_blended_pass_helper.h"

#include "unlittwotexture_vs40.inc"
#include "unlittwotexture_ps40.inc"

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

CREATE_CONSTANT_BUFFER( UnlitTwoTexture )
{
	// vsh
	Vector4D BaseTextureTransform[2];
	Vector4D BaseTexture2Transform[2];

	// psh
	Vector4D ModulationColor;
	Vector4D FogParams;
	Vector4D FogColor;
};

DEFINE_FALLBACK_SHADER( UnlitTwoTexture, UnlitTwoTexture_DX11 )

//extern ConVar r_flashlight_version2;

BEGIN_VS_SHADER( UnlitTwoTexture_DX11, "Help for UnlitTwoTexture_DX11" )
			  
	BEGIN_SHADER_PARAMS
		SHADER_PARAM( TEXTURE2, SHADER_PARAM_TYPE_TEXTURE, "shadertest/BaseTexture", "second texture" )
		SHADER_PARAM( FRAME2, SHADER_PARAM_TYPE_INTEGER, "0", "frame number for $texture2" )
		SHADER_PARAM( TEXTURE2TRANSFORM, SHADER_PARAM_TYPE_MATRIX, "center .5 .5 scale 1 1 rotate 0 translate 0 0", "$texture2 texcoord transform" )

		// Cloak Pass
		SHADER_PARAM( CLOAKPASSENABLED, SHADER_PARAM_TYPE_BOOL, "0", "Enables cloak render in a second pass" )
		SHADER_PARAM( CLOAKFACTOR, SHADER_PARAM_TYPE_FLOAT, "0.0", "" )
		SHADER_PARAM( CLOAKCOLORTINT, SHADER_PARAM_TYPE_COLOR, "[1 1 1]", "Cloak color tint" )
		SHADER_PARAM( REFRACTAMOUNT, SHADER_PARAM_TYPE_FLOAT, "2", "" )
	END_SHADER_PARAMS

	DECLARE_CONSTANT_BUFFER( UnlitTwoTexture )

	SHADER_INIT_GLOBAL
	{
		INIT_CONSTANT_BUFFER( UnlitTwoTexture );
	}

	SHADER_FALLBACK
	{
		return 0;
	}

	// Cloak Pass
	//void SetupVarsCloakBlendedPass( CloakBlendedPassVars_t &info )
	//{
	//	info.m_nCloakFactor = CLOAKFACTOR;
	//	info.m_nCloakColorTint = CLOAKCOLORTINT;
	//	info.m_nRefractAmount = REFRACTAMOUNT;
	//}

	bool NeedsPowerOfTwoFrameBufferTexture( IMaterialVar **params, bool bCheckSpecificToThisFrame ) const 
	{ 
		//if ( params[CLOAKPASSENABLED]->GetIntValue() ) // If material supports cloaking
		//{
		//	if ( bCheckSpecificToThisFrame == false ) // For setting model flag at load time
		//		return true;
		//	else if ( ( params[CLOAKFACTOR]->GetFloatValue() > 0.0f ) && ( params[CLOAKFACTOR]->GetFloatValue() < 1.0f ) ) // Per-frame check
		//		return true;
		//	// else, not cloaking this frame, so check flag2 in case the base material still needs it
		//}

		// Check flag2 if not drawing cloak pass
		return IS_FLAG2_SET( MATERIAL_VAR2_NEEDS_POWER_OF_TWO_FRAME_BUFFER_TEXTURE ); 
	}

	bool IsTranslucent( IMaterialVar **params ) const
	{
		//if ( params[CLOAKPASSENABLED]->GetIntValue() ) // If material supports cloaking
		//{
		//	if ( ( params[CLOAKFACTOR]->GetFloatValue() > 0.0f ) && ( params[CLOAKFACTOR]->GetFloatValue() < 1.0f ) ) // Per-frame check
		//		return true;
		//	// else, not cloaking this frame, so check flag in case the base material still needs it
		//}

		// Check flag if not drawing cloak pass
		return IS_FLAG_SET( MATERIAL_VAR_TRANSLUCENT ); 
	}

	SHADER_INIT_PARAMS()
	{
		SET_FLAGS2( MATERIAL_VAR2_SUPPORTS_HW_SKINNING );

		// Cloak Pass
		//if ( !params[CLOAKPASSENABLED]->IsDefined() )
		//{
		//	params[CLOAKPASSENABLED]->SetIntValue( 0 );
		//}
		//else if ( params[CLOAKPASSENABLED]->GetIntValue() )
		//{
		//	CloakBlendedPassVars_t info;
		//	SetupVarsCloakBlendedPass( info );
		//	InitParamsCloakBlendedPass( this, params, pMaterialName, info );
		//}
	}

	SHADER_INIT
	{
		if (params[BASETEXTURE]->IsDefined())
			LoadTexture( BASETEXTURE );
		if (params[TEXTURE2]->IsDefined())
			LoadTexture( TEXTURE2 );

		// Cloak Pass
		//if ( params[CLOAKPASSENABLED]->GetIntValue() )
		//{
		//	CloakBlendedPassVars_t info;
		//	SetupVarsCloakBlendedPass( info );
		//	InitCloakBlendedPass( this, params, info );
		//}
	}

	SHADER_DRAW
	{
		// Skip the standard rendering if cloak pass is fully opaque
		bool bDrawStandardPass = true;
		//if ( params[CLOAKPASSENABLED]->GetIntValue() && ( pShaderShadow == NULL ) ) // && not snapshotting
		//{
		//	CloakBlendedPassVars_t info;
		//	SetupVarsCloakBlendedPass( info );
		//	if ( CloakBlendedPassIsFullyOpaque( params, info ) )
		//	{
		//		bDrawStandardPass = false;
		//	}
		//}

		// Skip flashlight pass for unlit stuff
		//bool bNewFlashlightPath = IsX360() || ( r_flashlight_version2.GetInt() != 0 );
		//if ( bDrawStandardPass && ( pShaderShadow == NULL ) && ( pShaderAPI != NULL ) &&
		//	!bNewFlashlightPath && ( pShaderAPI->InFlashlightMode() ) ) // not snapshotting && flashlight pass)
		//{
		//	bDrawStandardPass = false;
		//}

		// Standard rendering pass
		if ( bDrawStandardPass )
		{
			BlendType_t nBlendType = EvaluateBlendRequirements( BASETEXTURE, true );
			bool bFullyOpaque = (nBlendType != BT_BLENDADD) && (nBlendType != BT_BLEND) && !IS_FLAG_SET(MATERIAL_VAR_ALPHATEST); //dest alpha is free for special use

			SHADOW_STATE
			{
				// Either we've got a constant modulation
				bool isTranslucent = IsAlphaModulating();

				// Or we've got a texture alpha on either texture
				isTranslucent = isTranslucent || TextureIsTranslucent( BASETEXTURE, true ) ||
					TextureIsTranslucent( TEXTURE2, true );

				if ( isTranslucent )
				{
					if ( IS_FLAG_SET(MATERIAL_VAR_ADDITIVE) )
					{
						EnableAlphaBlending( SHADER_BLEND_SRC_ALPHA, SHADER_BLEND_ONE );
					}
					else
					{
						EnableAlphaBlending( SHADER_BLEND_SRC_ALPHA, SHADER_BLEND_ONE_MINUS_SRC_ALPHA );
					}
				}
				else
				{
					if ( IS_FLAG_SET(MATERIAL_VAR_ADDITIVE) )
					{
						EnableAlphaBlending( SHADER_BLEND_ONE, SHADER_BLEND_ONE );
					}
					else
					{
						DisableAlphaBlending( );
					}
				}

				// Set stream format (note that this shader supports compression)
				unsigned int flags = VERTEX_POSITION | VERTEX_NORMAL | VERTEX_FORMAT_COMPRESSED;
				int nTexCoordCount = 1;
				int userDataSize = 0;
				if (IS_FLAG_SET( MATERIAL_VAR_VERTEXCOLOR ))
				{
					flags |= VERTEX_COLOR;
				}
				pShaderShadow->VertexShaderVertexFormat( flags, nTexCoordCount, NULL, userDataSize );

				SetVertexShaderConstantBuffer( 0, SHADER_CONSTANTBUFFER_SKINNING );
				SetVertexShaderConstantBuffer( 1, SHADER_CONSTANTBUFFER_PERFRAME );
				SetVertexShaderConstantBuffer( 2, SHADER_CONSTANTBUFFER_PERSCENE );
				SetVertexShaderConstantBuffer( 3, CONSTANT_BUFFER( UnlitTwoTexture ) );

				SetPixelShaderConstantBuffer( 0, SHADER_CONSTANTBUFFER_PERFRAME );
				SetPixelShaderConstantBuffer( 1, SHADER_CONSTANTBUFFER_PERSCENE );
				SetPixelShaderConstantBuffer( 2, CONSTANT_BUFFER( UnlitTwoTexture ) );

				DECLARE_STATIC_VERTEX_SHADER( unlittwotexture_vs40 );
				SET_STATIC_VERTEX_SHADER( unlittwotexture_vs40 );

				DECLARE_STATIC_PIXEL_SHADER( unlittwotexture_ps40 );
				SET_STATIC_PIXEL_SHADER( unlittwotexture_ps40 );

				DefaultFog();

				pShaderShadow->EnableAlphaWrites( bFullyOpaque );
			}
			DYNAMIC_STATE
			{
				BindTexture( SHADER_SAMPLER0, BASETEXTURE, FRAME );
				BindTexture( SHADER_SAMPLER1, TEXTURE2, FRAME2 );

				ALIGN16 CONSTANT_BUFFER_TYPE( UnlitTwoTexture ) consts;

				pShaderAPI->GetFogParamsAndColor( consts.FogParams.Base(), consts.FogColor.Base() );

				StoreVertexShaderTextureTransform( consts.BaseTextureTransform, BASETEXTURETRANSFORM );
				StoreVertexShaderTextureTransform( consts.BaseTexture2Transform, TEXTURE2TRANSFORM );

				SetModulationDynamicState_LinearColorSpace( consts.ModulationColor );

				UPDATE_CONSTANT_BUFFER( UnlitTwoTexture, consts );

				MaterialFogMode_t fogType = pShaderAPI->GetSceneFogMode();
				int fogIndex = ( fogType == MATERIAL_FOG_LINEAR_BELOW_FOG_Z ) ? 1 : 0;
				int numBones = pShaderAPI->GetCurrentNumBones();

				DECLARE_DYNAMIC_VERTEX_SHADER( unlittwotexture_vs40 );
				SET_DYNAMIC_VERTEX_SHADER_COMBO( SKINNING,  numBones > 0 );
				SET_DYNAMIC_VERTEX_SHADER_COMBO( DOWATERFOG,  fogIndex );
				SET_DYNAMIC_VERTEX_SHADER_COMBO( COMPRESSED_VERTS, (int)vertexCompression );
				SET_DYNAMIC_VERTEX_SHADER( unlittwotexture_vs40 );

				DECLARE_DYNAMIC_PIXEL_SHADER( unlittwotexture_ps40 );
				SET_DYNAMIC_PIXEL_SHADER_COMBO( PIXELFOGTYPE, pShaderAPI->GetPixelFogCombo() );
				SET_DYNAMIC_PIXEL_SHADER_COMBO( WRITE_DEPTH_TO_DESTALPHA, bFullyOpaque && pShaderAPI->ShouldWriteDepthToDestAlpha() );
				SET_DYNAMIC_PIXEL_SHADER( unlittwotexture_ps40 );
			}
			Draw();
		}
		else
		{
			// Skip this pass!
			Draw( false );
		}

		// Cloak Pass
		//if ( params[CLOAKPASSENABLED]->GetIntValue() )
		//{
			// If ( snapshotting ) or ( we need to draw this frame )
		//	if ( ( pShaderShadow != NULL ) || ( ( params[CLOAKFACTOR]->GetFloatValue() > 0.0f ) && ( params[CLOAKFACTOR]->GetFloatValue() < 1.0f ) ) )
		//	{
		//		CloakBlendedPassVars_t info;
		//		SetupVarsCloakBlendedPass( info );
		//		DrawCloakBlendedPass( this, params, pShaderAPI, pShaderShadow, info, vertexCompression );
		//	}
		//	else // We're not snapshotting and we don't need to draw this frame
		//	{
		//		// Skip this pass!
		//		Draw( false );
		//	}
		//}
	}
END_SHADER