lighttroupe/luz

module DrawingScreen
    def clear_screen(color)
        GL.ClearColor(*(color.to_a))
        GL.Clear(GL::COLOR_BUFFER_BIT | GL::DEPTH_BUFFER_BIT)
    end

    def fade_screen_to_color_with_alpha_blend(color, amount)
        return if amount == 0.0
        return clear_screen(color) if amount == 1.0

        a = color.to_a
        with_color_and_alpha([a[0], a[1], a[2], amount]) {
            GL.DepthMask(GL::FALSE)
            with_identity_transformation {
                fullscreen_rectangle
            }
            GL.DepthMask(GL::TRUE)
        }
        GL.Clear(GL::DEPTH_BUFFER_BIT)
    end
end