readBitmapSlice
suspend fun VfsFile.readBitmapSlice(name: String? = null, atlas: MutableAtlasUnit? = null, props: BaseImageDecodingProps = ImageDecodingProps.DEFAULT): BmpSlice
suspend fun VfsFile.readBitmapSlice(bprops: BaseImageDecodingProps, name: String? = null, atlas: MutableAtlasUnit? = null): BmpSlice