Function global_entrypoint 

pub fn global_entrypoint(
    thread_id: ThreadId,
    output_image: &mut [f32],
    settings: &ConvolveSettings,
    cached_samples: &[f32],
    input_image: &CPUImage<Rgba<f32>>,
    inpaint: &CPUImage<Rgba<f32>>,
    filter: &CPUImage<Rgba<f32>>,
    depth: &CPUImage<LumaA<f32>>,
    bilinear_sampler: &Sampler,
    nearest_sampler: &Sampler,
)