public ComposeImageTile(Sector sector, String mimeType, Level level, int width, int height) throws IOException { super(sector, level, -1, -1); // row and column aren't used and need to signal that this.width = width; this.height = height; this.file = File.createTempFile(WWIO.DELETE_ON_EXIT_PREFIX, WWIO.makeSuffixForMimeType(mimeType)); }