struct Input_ {
    float4 color_ : COLOR0;
    float3 normal_ : TEXCOORD0;
    float3 light_ : TEXCOORD1;
    float3 camera_ : TEXCOORD2;
};

struct Output_ {
    float4 color_ : COLOR;
};

Output_ main(
    in Input_ input
) {
    Output_ output;
    float diffuse = dot(-input.light_, input.normal_);
    float specular = dot(reflect(input.light_, input.normal_), input.camera_);
    specular = pow(max(0.0f, specular), 10);
    diffuse = max(0.0f, diffuse);
    output.color_ = (diffuse + 0.2f) * input.color_ + specular;
    return output;
}