public Raster decodeAsRaster(int page) throws IOException {
        RenderedImage im = decodeAsRenderedImage(page);
        return im.getData();
    }
Returns a <code>Raster</code> that contains the decoded
contents of the <code>SeekableStream</code> associated
with this <code>ImageDecoder</code>.
The given page of a multi-page image is decoded.  If
the page does not exist, an IOException will be thrown.
Page numbering begins at zero.

@param page The page to be decoded.
plugins/svg-plugin/batik-codec-fix/src/main/java/org/apache/batik/ext/awt/image/codec/util/ImageDecoderImpl.java