Texture2D<float4> inputTexture : register(t0);
SamplerState TextureSampler;

struct VSOutput
{
    float4 pos : SV_POSITION;
    float2 uv : TEXCOORD;
};

VSOutput vs(uint id : SV_VertexID)
{
    VSOutput output;
    float2 uv = float2((id << 1) & 2, id & 2);
    output.pos = float4(uv * 2 - 1, 0, 1);
    output.uv = uv * float2(1, -1) + float2(0, 1);
    return output;
}

float4 ps(VSOutput input) : SV_Target
{
    float4 color = inputTexture.Sample(TextureSampler, input.uv);
    return color;
}