// DYNAMIC: "PIXELFOGTYPE"				"0..1"
// DYNAMIC: "WRITE_DEPTH_TO_DESTALPHA"	"0..1"

#include "common_ps_fxc.h"
#include "modulate_constants_fxc.h"
#include "common_cbuffers_fxc.h"

CBUFFER_PERFRAME( register(b0) )
CBUFFER_PERSCENE( register(b1) )

cbuffer Modulate_CBuffer : register( b2 )
{
	Modulate_t c;
};

Texture2D BaseTexture		: register( t0 );
sampler BaseTextureSampler	: register( s0 );

#define g_WhiteGrayMix	c.cWhiteGrayMix
#define g_EyePos_SpecExponent		cEyePos

struct PS_INPUT
{
	float4 projPos		: SV_POSITION;
	float2 vTexCoord0	: TEXCOORD0;
	float4 vColor		: COLOR0;
	
	float4 worldPos_projPosZ		: TEXCOORD1;		// Necessary for pixel fog
	float3 eyeSpacePos				: COLOR1;
};

float4 main( PS_INPUT i ) : SV_TARGET
{
	float4 textureColor = BaseTexture.Sample( BaseTextureSampler, i.vTexCoord0 );

	float4 resultColor = saturate( textureColor * i.vColor );
	resultColor.rgb = lerp( g_WhiteGrayMix.rgb, resultColor.rgb, resultColor.a );

	float fogFactor = CalcPixelFogFactor( PIXELFOGTYPE, c.g_FogParams, g_EyePos_SpecExponent.z, i.worldPos_projPosZ.z, length( i.eyeSpacePos ) );
	return FinalOutput( resultColor, fogFactor, PIXELFOGTYPE, c.g_FogColor,
					    TONEMAP_SCALE_NONE, float4(1, 1, 1, 1), (WRITE_DEPTH_TO_DESTALPHA != 0), i.worldPos_projPosZ.w );
}