public void setGenerateEncodeParam(boolean generateEncodeParam) {
        this.generateEncodeParam = generateEncodeParam;
    }
If set, an instance of <code>PNGEncodeParam</code> will be
available after an image has been decoded via the
<code>getEncodeParam</code> method that encapsulates information
about the contents of the PNG file.  If not set, this information
will not be recorded and <code>getEncodeParam()</code> will
return <code>null</code>.
plugins/svg-plugin/batik-codec-fix/src/main/java/org/apache/batik/ext/awt/image/codec/png/PNGDecodeParam.java