* */
public String toPNGBase64String() {
// Create a JPEG transcoder
JPEGTranscoder jpegTranscoder = new JPEGTranscoder();
// Set the transcoding hints.
jpegTranscoder.addTranscodingHint(JPEGTranscoder.KEY_QUALITY, new Float(0.8));
// Create the transcoder input.
String inputString = getHeaders() + generateSVGString(); //svgDoc is set from generateSVGString()
TranscoderInput transcoderInput = new TranscoderInput(svgDoc);
Reader stringReader = new StringReader(inputString);
TranscoderInput transcoderInput2 = new TranscoderInput(stringReader);