public PNGEncodeParam getEncodeParam() {
        return encodeParam;
    }
If <code>getGenerateEncodeParam()</code> is <code>true</code>,
this method may be called after decoding has completed, and
will return an instance of <code>PNGEncodeParam</code> containing
information about the contents of the PNG file just decoded.
plugins/svg-plugin/batik-codec-fix/src/main/java/org/apache/batik/ext/awt/image/codec/png/PNGDecodeParam.java