Function rin::gl::image_based_light::cubemap_level_to_equirectangular

pub fn cubemap_level_to_equirectangular(
    cubemap: &CubeMap, 
    w: u32, 
    h: u32, 
    level: u32, 
    color_format: ColorFormat, 
    gl: &Renderer<'_, Screen>
) -> Texture

Convert cubemap environment map level to equirectangular format