image.type, instead of
identifying the type automatically. Useful if you want an error if
the image isn't the expected type, for loading image formats
that can't be reliably identified by looking at the data, or if
the user manually forces a specific type.gdkPixbufLoaderNewWithType(image.type, .errwarn = TRUE)NULL to ignore errorsgdkPixbufFormatGetName on each
of the gdkPixbufGetFormats.