fn compute_subpixel_mode(
raster_config: &Option<RasterConfig>,
tile_caches: &FastHashMap<SliceId, Box<TileCacheInstance>>,
parent_subpixel_mode: SubpixelMode,
) -> SubpixelModefn compute_subpixel_mode(
raster_config: &Option<RasterConfig>,
tile_caches: &FastHashMap<SliceId, Box<TileCacheInstance>>,
parent_subpixel_mode: SubpixelMode,
) -> SubpixelMode