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

#include "/Engine/Private/Common.ush"

Texture2D TextureOverlay;
Texture2D TextureBase;
SamplerState Sampler;

float4 DrawOverlay_PS(float2 uv : TEXCOORD) : SV_Target
{
	float4 srcColor = TextureOverlay.Sample(Sampler, uv);
	float4 dstColor = TextureBase.Sample(Sampler, uv);

	// Source-over blending (source color is already alpha-premultiplied)
	float3 outColor = dstColor.rgb * (1 - srcColor.a) + srcColor.rgb;

	return float4(outColor, 1);
}