Function ImFontAtlas_AddFontFromFileTTF

pub unsafe extern "C" fn ImFontAtlas_AddFontFromFileTTF(
    self_: *mut ImFontAtlas,
    filename: *const i8,
    size_pixels: f32,
    font_cfg: *const ImFontConfig,
    glyph_ranges: *const u16,
) -> *mut ImFont