vertex TextureMappingVertex mapTexture(unsigned int vertex_id [[ vertex_id ]]) {
    float4x4 renderedCoordinates = float4x4(float4( -1.0, -1.0, 0.0, 1.0 ),
                                            float4(  1.0, -1.0, 0.0, 1.0 ),
                                            float4( -1.0,  1.0, 0.0, 1.0 ),
                                            float4(  1.0,  1.0, 0.0, 1.0 ));

    float4x2 textureCoordinates = float4x2(float2( 0.0, 1.0 ),
                                           float2( 1.0, 1.0 ),
                                           float2( 0.0, 0.0 ),
                                           float2( 1.0, 0.0 ));
    TextureMappingVertex outVertex;
    outVertex.renderedCoordinate = renderedCoordinates[vertex_id];
    outVertex.textureCoordinate = textureCoordinates[vertex_id];
    
    return outVertex;
}

fragment half4 displayTexture(TextureMappingVertex mappingVertex [[ stage_in ]],
                              texture2d<float, access::sample> texture [[ texture(0) ]]) {
    constexpr sampler s(address::clamp_to_edge, filter::linear);

    return half4(texture.sample(s, mappingVertex.textureCoordinate));
}