//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose: 
//
//=============================================================================

#include "BaseVSShader.h"
#include "tier1/convar.h"
#include "mathlib/vmatrix.h"
#include "eyes_dx8_dx9_helper.h"
#include "cpp_shader_constant_register_map.h"
#include "Eyes.inc"
#include "eyes_flashlight_vs11.inc"
#include "eyes_flashlight_ps11.inc"

#ifdef STDSHADER_DX9_DLL_EXPORT

#include "eyes_vs20.inc"
#include "eyes_ps20.inc"
#include "eyes_ps20b.inc"
#include "eyes_flashlight_vs20.inc"
#include "eyes_flashlight_ps20.inc"
#include "eyes_flashlight_ps20b.inc"

#ifndef _X360
#include "eyes_vs30.inc"
#include "eyes_ps30.inc"
#include "eyes_flashlight_vs30.inc"
#include "eyes_flashlight_ps30.inc"
#endif

#endif

ConVar r_flashlight_version2( "r_flashlight_version2", "0", FCVAR_CHEAT | FCVAR_DEVELOPMENTONLY );

void InitParamsEyes_DX8_DX9( CBaseVSShader *pShader, IMaterialVar** params, const char *pMaterialName, 
							Eyes_DX8_DX9_Vars_t &info )
{
	if ( g_pHardwareConfig->SupportsBorderColor() )
	{
		params[FLASHLIGHTTEXTURE]->SetStringValue( "effects/flashlight_border" );
	}
	else
	{
		params[FLASHLIGHTTEXTURE]->SetStringValue( "effects/flashlight001" );
	}

	SET_FLAGS2( MATERIAL_VAR2_SUPPORTS_HW_SKINNING );
	SET_FLAGS2( MATERIAL_VAR2_LIGHTING_VERTEX_LIT );

	Assert( info.m_nIntro != -1 );
	if( info.m_nIntro != -1 && !params[info.m_nIntro]->IsDefined() )
	{
		params[info.m_nIntro]->SetIntValue( 0 );
	}
}

void InitEyes_DX8_DX9( CBaseVSShader *pShader, IMaterialVar** params, Eyes_DX8_DX9_Vars_t &info )
{
	pShader->LoadTexture( FLASHLIGHTTEXTURE, TEXTUREFLAGS_SRGB );
	pShader->LoadTexture( info.m_nBaseTexture, TEXTUREFLAGS_SRGB );
	pShader->LoadTexture( info.m_nIris, TEXTUREFLAGS_SRGB );
	pShader->LoadTexture( info.m_nGlint );

	// Be sure dilation is zeroed if undefined
	if( !params[info.m_nDilation]->IsDefined() )
	{
		params[info.m_nDilation]->SetFloatValue( 0.0f );
	}
}

static void SetDepthFlashlightParams( CBaseVSShader *pShader, IShaderDynamicAPI *pShaderAPI, const VMatrix& worldToTexture, const FlashlightState_t& flashlightState ) 
{
	float atten[4], pos[4], tweaks[4];
	atten[0] = flashlightState.m_fConstantAtten;		// Set the flashlight attenuation factors
	atten[1] = flashlightState.m_fLinearAtten;
	atten[2] = flashlightState.m_fQuadraticAtten;
	atten[3] = flashlightState.m_FarZ;
	pShaderAPI->SetPixelShaderConstant( PSREG_FLASHLIGHT_ATTENUATION, atten, 1 );

	pos[0] = flashlightState.m_vecLightOrigin[0];		// Set the flashlight origin
	pos[1] = flashlightState.m_vecLightOrigin[1];
	pos[2] = flashlightState.m_vecLightOrigin[2];
	pShaderAPI->SetPixelShaderConstant( PSREG_FLASHLIGHT_POSITION_RIM_BOOST, pos, 1 );

	pShaderAPI->SetPixelShaderConstant( PSREG_FLASHLIGHT_TO_WORLD_TEXTURE, worldToTexture.Base(), 4 );

	// Tweaks associated with a given flashlight
	tweaks[0] = ShadowFilterFromState( flashlightState );
	tweaks[1] = ShadowAttenFromState( flashlightState );
	pShader->HashShadow2DJitter( flashlightState.m_flShadowJitterSeed, &tweaks[2], &tweaks[3] );
	pShaderAPI->SetPixelShaderConstant( PSREG_ENVMAP_TINT__SHADOW_TWEAKS, tweaks, 1 );

	// Dimensions of screen, used for screen-space noise map sampling
	float vScreenScale[4] = {1280.0f / 32.0f, 720.0f / 32.0f, 0, 0};
	int nWidth, nHeight;
	pShaderAPI->GetBackBufferDimensions( nWidth, nHeight );
	vScreenScale[0] = (float) nWidth  / 32.0f;
	vScreenScale[1] = (float) nHeight / 32.0f;
	pShaderAPI->SetPixelShaderConstant( PSREG_FLASHLIGHT_SCREEN_SCALE, vScreenScale, 1 );

	if ( IsX360() )
	{
		pShaderAPI->SetBooleanPixelShaderConstant( 0, &flashlightState.m_nShadowQuality, 1 );
	}
}


static void DrawFlashlight( bool bDX9, CBaseVSShader *pShader, IMaterialVar** params, IShaderDynamicAPI *pShaderAPI, 
						   IShaderShadow* pShaderShadow, Eyes_DX8_DX9_Vars_t &info, VertexCompressionType_t vertexCompression )
{
	if( pShaderShadow )
	{
		pShaderShadow->EnableDepthWrites( false );

		pShader->EnableAlphaBlending( SHADER_BLEND_ONE, SHADER_BLEND_ONE );	// Write over the eyes that were already there 

		pShaderShadow->EnableTexture( SHADER_SAMPLER0, true );			// Spot
		pShaderShadow->EnableTexture( SHADER_SAMPLER1, true );			// Base
		pShaderShadow->EnableTexture( SHADER_SAMPLER2, true );			// Normalizing cubemap
		pShaderShadow->EnableTexture( SHADER_SAMPLER3, true );			// Iris

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

		// Be sure not to write to dest alpha
		pShaderShadow->EnableAlphaWrites( false );

#ifdef STDSHADER_DX9_DLL_EXPORT
		if ( bDX9 )
		{
			int nShadowFilterMode = g_pHardwareConfig->GetShadowFilterMode();	// Based upon vendor and device dependent formats
#ifndef _X360
			if ( !g_pHardwareConfig->HasFastVertexTextures() )
#endif
			{
				DECLARE_STATIC_VERTEX_SHADER( eyes_flashlight_vs20 );
				SET_STATIC_VERTEX_SHADER( eyes_flashlight_vs20 );

				if ( g_pHardwareConfig->SupportsPixelShaders_2_b() )
				{
					DECLARE_STATIC_PIXEL_SHADER( eyes_flashlight_ps20b );
					SET_STATIC_PIXEL_SHADER_COMBO( FLASHLIGHTDEPTHFILTERMODE, nShadowFilterMode );
					SET_STATIC_PIXEL_SHADER( eyes_flashlight_ps20b );
				}
				else
				{
					DECLARE_STATIC_PIXEL_SHADER( eyes_flashlight_ps20 );
					SET_STATIC_PIXEL_SHADER( eyes_flashlight_ps20 );
				}
			}
#ifndef _X360
			else
			{
				// The vertex shader uses the vertex id stream
				SET_FLAGS2( MATERIAL_VAR2_USES_VERTEXID );

				DECLARE_STATIC_VERTEX_SHADER( eyes_flashlight_vs30 );
				SET_STATIC_VERTEX_SHADER( eyes_flashlight_vs30 );

				DECLARE_STATIC_PIXEL_SHADER( eyes_flashlight_ps30 );
				SET_STATIC_PIXEL_SHADER_COMBO( FLASHLIGHTDEPTHFILTERMODE, nShadowFilterMode );
				SET_STATIC_PIXEL_SHADER( eyes_flashlight_ps30 );
			}
#endif

			// On DX9, get the gamma read and write correct
			pShaderShadow->EnableSRGBRead( SHADER_SAMPLER0, true );			// Spot
			pShaderShadow->EnableSRGBRead( SHADER_SAMPLER1, true );			// Base
			pShaderShadow->EnableSRGBRead( SHADER_SAMPLER3, true );			// Iris
			pShaderShadow->EnableSRGBWrite( true );

			if ( g_pHardwareConfig->SupportsPixelShaders_2_b() )
			{
				pShaderShadow->EnableTexture( SHADER_SAMPLER4, true );			// Shadow depth map
				pShaderShadow->SetShadowDepthFiltering( SHADER_SAMPLER4 );
				pShaderShadow->EnableTexture( SHADER_SAMPLER5, true );			// Shadow noise rotation map
			}
		}
		else
#endif
		{
			// DX8 uses old asm shaders
			eyes_flashlight_vs11_Static_Index	vshIndex;
			pShaderShadow->SetVertexShader( "eyes_flashlight_vs11", vshIndex.GetIndex() );

			eyes_flashlight_ps11_Static_Index	pshIndex;
			pShaderShadow->SetPixelShader( "eyes_flashlight_ps11", pshIndex.GetIndex() );
		}
		
		pShader->FogToBlack();
	}
	else
	{
		// Specify that we have XYZ texcoords that need to be divided by W before the pixel shader.
		// NOTE Tried to divide XY by Z, but doesn't work.
		// The dx9.0c runtime says that we shouldn't have a non-zero dimension when using vertex and pixel shaders.
		if ( !bDX9 )
		{
			pShaderAPI->SetTextureTransformDimension( SHADER_TEXTURE_STAGE0, 0, true );
		}
		
		VMatrix worldToTexture;
		ITexture *pFlashlightDepthTexture;
		FlashlightState_t flashlightState = pShaderAPI->GetFlashlightStateEx( worldToTexture, &pFlashlightDepthTexture );

		pShader->BindTexture( SHADER_SAMPLER0, flashlightState.m_pSpotlightTexture, flashlightState.m_nSpotlightTextureFrame );
		pShader->BindTexture( SHADER_SAMPLER1, info.m_nBaseTexture, info.m_nFrame );
		pShaderAPI->BindStandardTexture( SHADER_SAMPLER2, TEXTURE_NORMALIZATION_CUBEMAP );
		pShader->BindTexture( SHADER_SAMPLER3, info.m_nIris, info.m_nIrisFrame );

#ifdef STDSHADER_DX9_DLL_EXPORT
		if ( bDX9 )
		{

#ifndef _X360
			if ( !g_pHardwareConfig->HasFastVertexTextures() )
#endif
			{
				DECLARE_DYNAMIC_VERTEX_SHADER( eyes_flashlight_vs20 );
				SET_DYNAMIC_VERTEX_SHADER_COMBO( DOWATERFOG, pShaderAPI->GetSceneFogMode() == MATERIAL_FOG_LINEAR_BELOW_FOG_Z );
				SET_DYNAMIC_VERTEX_SHADER_COMBO( SKINNING, pShaderAPI->GetCurrentNumBones() > 0 );
				SET_DYNAMIC_VERTEX_SHADER_COMBO( COMPRESSED_VERTS, (int)vertexCompression );
				SET_DYNAMIC_VERTEX_SHADER( eyes_flashlight_vs20 );
			}
#ifndef _X360
			else
			{
				pShader->SetHWMorphVertexShaderState( VERTEX_SHADER_SHADER_SPECIFIC_CONST_10, VERTEX_SHADER_SHADER_SPECIFIC_CONST_11, SHADER_VERTEXTEXTURE_SAMPLER0 );

				DECLARE_DYNAMIC_VERTEX_SHADER( eyes_flashlight_vs30 );
				SET_DYNAMIC_VERTEX_SHADER_COMBO( DOWATERFOG, pShaderAPI->GetSceneFogMode() == MATERIAL_FOG_LINEAR_BELOW_FOG_Z );
				SET_DYNAMIC_VERTEX_SHADER_COMBO( SKINNING, pShaderAPI->GetCurrentNumBones() > 0 );
				SET_DYNAMIC_VERTEX_SHADER_COMBO( MORPHING, pShaderAPI->IsHWMorphingEnabled() );
				SET_DYNAMIC_VERTEX_SHADER_COMBO( COMPRESSED_VERTS, (int)vertexCompression );
				SET_DYNAMIC_VERTEX_SHADER( eyes_flashlight_vs30 );
			}
#endif

//			float vPSConst[4] = {params[info.m_nDilation]->GetFloatValue(), 0.0f, 0.0f, 0.0f};
//			pShaderAPI->SetPixelShaderConstant( 0, vPSConst, 1 );

			VMatrix worldToTexture;
			ITexture *pFlashlightDepthTexture;
			FlashlightState_t flashlightState = pShaderAPI->GetFlashlightStateEx( worldToTexture, &pFlashlightDepthTexture );
			SetFlashLightColorFromState( flashlightState, pShaderAPI );

			if( pFlashlightDepthTexture && g_pConfig->ShadowDepthTexture() && flashlightState.m_bEnableShadows )
			{
				pShader->BindTexture( SHADER_SAMPLER4, pFlashlightDepthTexture, 0 );
				pShaderAPI->BindStandardTexture( SHADER_SAMPLER5, TEXTURE_SHADOW_NOISE_2D );
			}

			pShaderAPI->SetPixelShaderFogParams( PSREG_FOG_PARAMS );

			float vEyePos_SpecExponent[4];
			pShaderAPI->GetWorldSpaceCameraPosition( vEyePos_SpecExponent );
			vEyePos_SpecExponent[3] = 0.0f;
			pShaderAPI->SetPixelShaderConstant( PSREG_EYEPOS_SPEC_EXPONENT, vEyePos_SpecExponent, 1 );

#ifndef _X360
			if ( !g_pHardwareConfig->HasFastVertexTextures() )
#endif
			{
				if ( g_pHardwareConfig->SupportsPixelShaders_2_b() )
				{
					DECLARE_DYNAMIC_PIXEL_SHADER( eyes_flashlight_ps20b );
					SET_DYNAMIC_PIXEL_SHADER_COMBO( PIXELFOGTYPE, pShaderAPI->GetPixelFogCombo() );
					SET_DYNAMIC_PIXEL_SHADER_COMBO( FLASHLIGHTSHADOWS, flashlightState.m_bEnableShadows && ( pFlashlightDepthTexture != NULL ) );
					SET_DYNAMIC_PIXEL_SHADER( eyes_flashlight_ps20b );

					SetDepthFlashlightParams( pShader, pShaderAPI, worldToTexture, flashlightState );
				}
				else
				{
					DECLARE_DYNAMIC_PIXEL_SHADER( eyes_flashlight_ps20 );
					SET_DYNAMIC_PIXEL_SHADER_COMBO( PIXELFOGTYPE, pShaderAPI->GetPixelFogCombo() );
					SET_DYNAMIC_PIXEL_SHADER( eyes_flashlight_ps20 );
				}
			}
#ifndef _X360
			else
			{
				DECLARE_DYNAMIC_PIXEL_SHADER( eyes_flashlight_ps30 );
				SET_DYNAMIC_PIXEL_SHADER_COMBO( PIXELFOGTYPE, pShaderAPI->GetPixelFogCombo() );
				SET_DYNAMIC_PIXEL_SHADER_COMBO( FLASHLIGHTSHADOWS, flashlightState.m_bEnableShadows && ( pFlashlightDepthTexture != NULL ) );
				SET_DYNAMIC_PIXEL_SHADER( eyes_flashlight_ps30 );

				SetDepthFlashlightParams( pShader, pShaderAPI, worldToTexture, flashlightState );
			}
#endif
		}
		else // older asm shaders for DX8
#endif
		{
			eyes_flashlight_vs11_Dynamic_Index vshIndex;
			vshIndex.SetDOWATERFOG( pShaderAPI->GetSceneFogMode() == MATERIAL_FOG_LINEAR_BELOW_FOG_Z );
			vshIndex.SetSKINNING( pShaderAPI->GetCurrentNumBones() > 0 );
			pShaderAPI->SetVertexShaderIndex( vshIndex.GetIndex() );

			eyes_flashlight_ps11_Dynamic_Index pshIndex;
			pShaderAPI->SetPixelShaderIndex( pshIndex.GetIndex() );
		}

		// This uses from VERTEX_SHADER_SHADER_SPECIFIC_CONST_0 to VERTEX_SHADER_SHADER_SPECIFIC_CONST_5
		pShader->SetFlashlightVertexShaderConstants( false, -1, false, -1, false );

		pShader->SetVertexShaderConstant( VERTEX_SHADER_SHADER_SPECIFIC_CONST_6, info.m_nEyeOrigin );
		pShader->SetVertexShaderConstant( VERTEX_SHADER_SHADER_SPECIFIC_CONST_7, info.m_nEyeUp );
		pShader->SetVertexShaderConstant( VERTEX_SHADER_SHADER_SPECIFIC_CONST_8, info.m_nIrisU );
		pShader->SetVertexShaderConstant( VERTEX_SHADER_SHADER_SPECIFIC_CONST_9, info.m_nIrisV );
	}
	pShader->Draw();
}

static void DrawUsingVertexShader( bool bDX9, CBaseVSShader *pShader, IMaterialVar** params, 
								  IShaderDynamicAPI *pShaderAPI, IShaderShadow* pShaderShadow,
								  Eyes_DX8_DX9_Vars_t &info, VertexCompressionType_t vertexCompression )
{
	SHADOW_STATE
	{
		pShaderShadow->EnableTexture( SHADER_SAMPLER0, true );	// Base
		pShaderShadow->EnableTexture( SHADER_SAMPLER1, true );	// Iris
		pShaderShadow->EnableTexture( SHADER_SAMPLER2, true );	// Glint

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

		pShaderShadow->EnableAlphaWrites( true ); //we end up hijacking destination alpha for opaques most of the time.
		
#ifdef STDSHADER_DX9_DLL_EXPORT
		if ( bDX9 )
		{
#ifndef _X360
			if ( !g_pHardwareConfig->HasFastVertexTextures() )
#endif
			{
				bool bUseStaticControlFlow = g_pHardwareConfig->SupportsStaticControlFlow();

				DECLARE_STATIC_VERTEX_SHADER( eyes_vs20 );
				SET_STATIC_VERTEX_SHADER_COMBO( HALFLAMBERT, IS_FLAG_SET( MATERIAL_VAR_HALFLAMBERT ) );
				SET_STATIC_VERTEX_SHADER_COMBO( INTRO, params[info.m_nIntro]->GetIntValue() ? 1 : 0 );
				SET_STATIC_VERTEX_SHADER_COMBO( USE_STATIC_CONTROL_FLOW, bUseStaticControlFlow );
				SET_STATIC_VERTEX_SHADER( eyes_vs20 );

				if( g_pHardwareConfig->SupportsPixelShaders_2_b() )
				{
					DECLARE_STATIC_PIXEL_SHADER( eyes_ps20b );
					SET_STATIC_PIXEL_SHADER( eyes_ps20b );
				}
				else
				{
					DECLARE_STATIC_PIXEL_SHADER( eyes_ps20 );
					SET_STATIC_PIXEL_SHADER( eyes_ps20 );
				}
			}
#ifndef _X360
			else
			{
				// The vertex shader uses the vertex id stream
				SET_FLAGS2( MATERIAL_VAR2_USES_VERTEXID );

				DECLARE_STATIC_VERTEX_SHADER( eyes_vs30 );
				SET_STATIC_VERTEX_SHADER_COMBO( HALFLAMBERT, IS_FLAG_SET( MATERIAL_VAR_HALFLAMBERT ) );
				SET_STATIC_VERTEX_SHADER_COMBO( INTRO, params[info.m_nIntro]->GetIntValue() ? 1 : 0 );
				SET_STATIC_VERTEX_SHADER( eyes_vs30 );

				DECLARE_STATIC_PIXEL_SHADER( eyes_ps30 );
				SET_STATIC_PIXEL_SHADER( eyes_ps30 );
			}
#endif
			// On DX9, get the gamma read and write correct
			pShaderShadow->EnableSRGBRead( SHADER_SAMPLER0, true );			// Base
			pShaderShadow->EnableSRGBRead( SHADER_SAMPLER1, true );			// White
			pShaderShadow->EnableSRGBWrite( true );
		}
		else
#endif
		{
			eyes_Static_Index vshIndex;
			vshIndex.SetHALF_LAMBERT( IS_FLAG_SET( MATERIAL_VAR_HALFLAMBERT ) );
			pShaderShadow->SetVertexShader( "Eyes", vshIndex.GetIndex() );

			pShaderShadow->SetPixelShader( "Eyes_Overbright2" );
		}

		pShader->FogToFogColor();
	}
	DYNAMIC_STATE
	{
		pShader->BindTexture( SHADER_SAMPLER0, info.m_nBaseTexture, info.m_nFrame );
		pShader->BindTexture( SHADER_SAMPLER1, info.m_nIris, info.m_nIrisFrame );
		pShader->BindTexture( SHADER_SAMPLER2, info.m_nGlint );
		pShader->SetAmbientCubeDynamicStateVertexShader();
		pShader->SetVertexShaderConstant( VERTEX_SHADER_SHADER_SPECIFIC_CONST_0, info.m_nEyeOrigin );
		pShader->SetVertexShaderConstant( VERTEX_SHADER_SHADER_SPECIFIC_CONST_1, info.m_nEyeUp );
		pShader->SetVertexShaderConstant( VERTEX_SHADER_SHADER_SPECIFIC_CONST_2, info.m_nIrisU );
		pShader->SetVertexShaderConstant( VERTEX_SHADER_SHADER_SPECIFIC_CONST_3, info.m_nIrisV );
		pShader->SetVertexShaderConstant( VERTEX_SHADER_SHADER_SPECIFIC_CONST_4, info.m_nGlintU );
		pShader->SetVertexShaderConstant( VERTEX_SHADER_SHADER_SPECIFIC_CONST_5, info.m_nGlintV );

#ifdef STDSHADER_DX9_DLL_EXPORT
		if( bDX9 )
		{
			LightState_t lightState;
			pShaderAPI->GetDX9LightState( &lightState );

#ifndef _X360
			if ( !g_pHardwareConfig->HasFastVertexTextures() )
#endif
			{
				bool bUseStaticControlFlow = g_pHardwareConfig->SupportsStaticControlFlow();

				DECLARE_DYNAMIC_VERTEX_SHADER( eyes_vs20 );
				SET_DYNAMIC_VERTEX_SHADER_COMBO( DOWATERFOG, pShaderAPI->GetSceneFogMode() == MATERIAL_FOG_LINEAR_BELOW_FOG_Z );
				SET_DYNAMIC_VERTEX_SHADER_COMBO( SKINNING, pShaderAPI->GetCurrentNumBones() > 0 );
				SET_DYNAMIC_VERTEX_SHADER_COMBO( DYNAMIC_LIGHT, lightState.HasDynamicLight() );
				SET_DYNAMIC_VERTEX_SHADER_COMBO( STATIC_LIGHT,  lightState.m_bStaticLightVertex  ? 1 : 0 );
				SET_DYNAMIC_VERTEX_SHADER_COMBO( COMPRESSED_VERTS, (int)vertexCompression );
				SET_DYNAMIC_VERTEX_SHADER_COMBO( NUM_LIGHTS, bUseStaticControlFlow ? 0 : lightState.m_nNumLights );
				SET_DYNAMIC_VERTEX_SHADER( eyes_vs20 );
			}
#ifndef _X360
			else
			{
				pShader->SetHWMorphVertexShaderState( VERTEX_SHADER_SHADER_SPECIFIC_CONST_7, VERTEX_SHADER_SHADER_SPECIFIC_CONST_8, SHADER_VERTEXTEXTURE_SAMPLER0 );

				DECLARE_DYNAMIC_VERTEX_SHADER( eyes_vs30 );
				SET_DYNAMIC_VERTEX_SHADER_COMBO( DOWATERFOG, pShaderAPI->GetSceneFogMode() == MATERIAL_FOG_LINEAR_BELOW_FOG_Z );
				SET_DYNAMIC_VERTEX_SHADER_COMBO( SKINNING, pShaderAPI->GetCurrentNumBones() > 0 );
				SET_DYNAMIC_VERTEX_SHADER_COMBO( DYNAMIC_LIGHT, lightState.HasDynamicLight() );
				SET_DYNAMIC_VERTEX_SHADER_COMBO( STATIC_LIGHT,  lightState.m_bStaticLightVertex  ? 1 : 0 );
				SET_DYNAMIC_VERTEX_SHADER_COMBO( MORPHING, pShaderAPI->IsHWMorphingEnabled() );
				SET_DYNAMIC_VERTEX_SHADER_COMBO( COMPRESSED_VERTS, (int)vertexCompression );
				SET_DYNAMIC_VERTEX_SHADER( eyes_vs30 );
			}
#endif

			// Get luminance of ambient cube and saturate it
			float fGlintDamping = max(0.0f, min( pShaderAPI->GetAmbientLightCubeLuminance(), 1.0f ) );
			const float fDimGlint = 0.01f;

			// Remap so that glint damping smooth steps to zero for low luminances
			if ( fGlintDamping > fDimGlint )
				fGlintDamping = 1.0f;
			else
				fGlintDamping *= SimpleSplineRemapVal( fGlintDamping, 0.0f, fDimGlint, 0.0f, 1.0f );

			// Special constant for DX9 eyes: { Dilation, ambient, x, x };
			float vPSConst[4] = {params[info.m_nDilation]->GetFloatValue(), fGlintDamping, 0.0f, 0.0f};
			pShaderAPI->SetPixelShaderConstant( 0, vPSConst, 1 );

			pShaderAPI->SetPixelShaderFogParams( PSREG_FOG_PARAMS );

			float vEyePos_SpecExponent[4];
			pShaderAPI->GetWorldSpaceCameraPosition( vEyePos_SpecExponent );
			vEyePos_SpecExponent[3] = 0.0f;
			pShaderAPI->SetPixelShaderConstant( PSREG_EYEPOS_SPEC_EXPONENT, vEyePos_SpecExponent, 1 );

#ifndef _X360
			if ( !g_pHardwareConfig->HasFastVertexTextures() )
#endif
			{
				if( g_pHardwareConfig->SupportsPixelShaders_2_b() )
				{
					DECLARE_DYNAMIC_PIXEL_SHADER( eyes_ps20b );
					SET_DYNAMIC_PIXEL_SHADER_COMBO( PIXELFOGTYPE, pShaderAPI->GetPixelFogCombo() );
					SET_DYNAMIC_PIXEL_SHADER_COMBO( WRITE_DEPTH_TO_DESTALPHA, pShaderAPI->ShouldWriteDepthToDestAlpha() );
					SET_DYNAMIC_PIXEL_SHADER( eyes_ps20b );
				}
				else
				{
					DECLARE_DYNAMIC_PIXEL_SHADER( eyes_ps20 );
					SET_DYNAMIC_PIXEL_SHADER_COMBO( PIXELFOGTYPE, pShaderAPI->GetPixelFogCombo() );
					SET_DYNAMIC_PIXEL_SHADER( eyes_ps20 );
				}
			}
#ifndef _X360
			else
			{
				DECLARE_DYNAMIC_PIXEL_SHADER( eyes_ps30 );
				SET_DYNAMIC_PIXEL_SHADER_COMBO( PIXELFOGTYPE, pShaderAPI->GetPixelFogCombo() );
				SET_DYNAMIC_PIXEL_SHADER_COMBO( WRITE_DEPTH_TO_DESTALPHA, pShaderAPI->ShouldWriteDepthToDestAlpha() );
				SET_DYNAMIC_PIXEL_SHADER( eyes_ps30 );
			}
#endif

			Assert( info.m_nIntro != -1 );
			if( params[info.m_nIntro]->GetIntValue() )
			{
				float curTime = params[info.m_nWarpParam]->GetFloatValue();
				float timeVec[4] = { 0.0f, 0.0f, 0.0f, curTime };
				Assert( params[info.m_nEntityOrigin]->IsDefined() );
				params[info.m_nEntityOrigin]->GetVecValue( timeVec, 3 );
				pShaderAPI->SetVertexShaderConstant( VERTEX_SHADER_SHADER_SPECIFIC_CONST_6, timeVec, 1 );
			}
		}
		else
#endif
		{
			eyes_Dynamic_Index vshIndex;
			vshIndex.SetDOWATERFOG( pShaderAPI->GetSceneFogMode() == MATERIAL_FOG_LINEAR_BELOW_FOG_Z );
			vshIndex.SetSKINNING( pShaderAPI->GetCurrentNumBones() > 0 );
			vshIndex.SetLIGHT_COMBO( pShaderAPI->GetCurrentLightCombo() );
			pShaderAPI->SetVertexShaderIndex( vshIndex.GetIndex() );
		}
	}
	pShader->Draw();
}

static void DrawEyes_DX8_DX9_Internal( bool bDX9, CBaseVSShader *pShader, IMaterialVar** params, IShaderDynamicAPI *pShaderAPI,
	IShaderShadow* pShaderShadow, bool bHasFlashlight, Eyes_DX8_DX9_Vars_t &info, VertexCompressionType_t vertexCompression )
{
	if( !bHasFlashlight )
	{
		DrawUsingVertexShader( bDX9, pShader, params, pShaderAPI, pShaderShadow, info, vertexCompression );
	}
	else
	{
		DrawFlashlight( bDX9, pShader, params, pShaderAPI, pShaderShadow, info, vertexCompression );
	}
}

extern ConVar r_flashlight_version2;
void DrawEyes_DX8_DX9( bool bDX9, CBaseVSShader *pShader, IMaterialVar** params, IShaderDynamicAPI *pShaderAPI,
					  IShaderShadow* pShaderShadow, Eyes_DX8_DX9_Vars_t &info, VertexCompressionType_t vertexCompression )
{
	SHADOW_STATE
	{
		SET_FLAGS2( MATERIAL_VAR2_LIGHTING_VERTEX_LIT );
	}
	bool bHasFlashlight = pShader->UsingFlashlight( params );
	if( bHasFlashlight && ( IsX360() || r_flashlight_version2.GetInt() ) )
	{
		DrawEyes_DX8_DX9_Internal( bDX9, pShader, params, pShaderAPI, pShaderShadow, false, info, vertexCompression );
		if ( pShaderShadow )
		{
			pShader->SetInitialShadowState( );
		}
	}
	DrawEyes_DX8_DX9_Internal( bDX9, pShader, params, pShaderAPI, pShaderShadow, bHasFlashlight, info, vertexCompression );
}