// Copyright Epic Games, Inc. All Rights Reserved.

/*=============================================================================
	ScreenPixelShader.usf: Filter pixel shader source.
=============================================================================*/

#include "Common.ush"

Texture2D InTexture;
SamplerState InTextureSampler;
int MipLevel;

void Main(
	FScreenVertexOutput Input,
	out float4 OutColor : SV_Target0
	)
{
	OutColor = Texture2DSample(InTexture, InTextureSampler, Input.UV);
}

void MainInvertAlpha(
	FScreenVertexOutput Input,
	out float4 OutColor : SV_Target0
	)
{
	OutColor = Texture2DSample(InTexture, InTextureSampler, Input.UV);
	OutColor.a = 1.f - OutColor.a;
}

void MainsRGBSource(
	FScreenVertexOutput Input,
	out float4 OutColor : SV_Target0
	)
{
	OutColor = Texture2DSample(InTexture, InTextureSampler, Input.UV);
	OutColor.rgb = pow( OutColor.rgb, 1.0f / 2.2f );
}

void MainMipLevel(
	FScreenVertexOutput Input,
	out float4 OutColor : SV_Target0
	)
{
	OutColor = Texture2DSampleLevel(InTexture, InTextureSampler, Input.UV, MipLevel);
}

void MainsRGBSourceMipLevel(
	FScreenVertexOutput Input,
	out float4 OutColor : SV_Target0
	)
{
	OutColor = Texture2DSampleLevel(InTexture, InTextureSampler, Input.UV, MipLevel);
	OutColor.rgb = pow( OutColor.rgb, 1.0f / 2.2f );
}