How to use

PNGEncodeParam$RGB

in

org.apache.batik.ext.awt.image.codec.png

  encodeParam = new PNGEncodeParam.Gray();
} else {
  encodeParam = new PNGEncodeParam.RGB();

if (encodeParam != null) {
  ((PNGEncodeParam.RGB)encodeParam).
    setBackgroundRGB(bkgdRGB);

rgbTrans[2] = blueTransparentAlpha;
((PNGEncodeParam.RGB)encodeParam).
  setTransparentRGB(rgbTrans);

private void writeBKGD() throws IOException {
  if (param.isBackgroundSet()) {
    ChunkStream cs = new ChunkStream("bKGD");
    switch (colorType) {
    case PNG_COLOR_GRAY:
    case PNG_COLOR_GRAY_ALPHA:
      int gray = ((PNGEncodeParam.Gray)param).getBackgroundGray();
      cs.writeShort(gray);
      break;
    case PNG_COLOR_PALETTE:
      int index =
        ((PNGEncodeParam.Palette)param).getBackgroundPaletteIndex();
      cs.writeByte(index);
      break;
    case PNG_COLOR_RGB:
    case PNG_COLOR_RGB_ALPHA:
      int[] rgb = ((PNGEncodeParam.RGB)param).getBackgroundRGB();
      cs.writeShort(rgb[0]);
      cs.writeShort(rgb[1]);
      cs.writeShort(rgb[2]);
      break;
    }
    cs.writeToStream(dataOutput);
    cs.close();
  }
}

((PNGEncodeParam.RGB)params).setBackgroundRGB
  (new int [] { 255, 255, 255 });

((PNGEncodeParam.RGB)params).setBackgroundRGB
  (new int [] { 255, 255, 255 });

rgbTrans[2] = blueTransparentAlpha;
((PNGEncodeParam.RGB)encodeParam).
  setTransparentRGB(rgbTrans);

if (encodeParam != null) {
  ((PNGEncodeParam.RGB)encodeParam).
    setBackgroundRGB(bkgdRGB);

if (encodeParam != null) {
  ((PNGEncodeParam.RGB)encodeParam).
    setBackgroundRGB(bkgdRGB);

rgbTrans[2] = blueTransparentAlpha;
((PNGEncodeParam.RGB)encodeParam).
  setTransparentRGB(rgbTrans);

rgbTrans[2] = blueTransparentAlpha;
((PNGEncodeParam.RGB)encodeParam).
  setTransparentRGB(rgbTrans);

if (encodeParam != null) {
  ((PNGEncodeParam.RGB)encodeParam).
    setBackgroundRGB(bkgdRGB);

((PNGEncodeParam.RGB)params).setBackgroundRGB
  (new int [] { 255, 255, 255 });

rgbTrans[2] = blueTransparentAlpha;
((PNGEncodeParam.RGB)encodeParam).
  setTransparentRGB(rgbTrans);

if (encodeParam != null) {
  ((PNGEncodeParam.RGB)encodeParam).
    setBackgroundRGB(bkgdRGB);

rgbTrans[2] = blueTransparentAlpha;
((PNGEncodeParam.RGB)encodeParam).
  setTransparentRGB(rgbTrans);

((PNGEncodeParam.RGB)params).setBackgroundRGB
  (new int [] { 255, 255, 255 });

rgbTrans[2] = blueTransparentAlpha;
((PNGEncodeParam.RGB)encodeParam).
  setTransparentRGB(rgbTrans);

  cs.writeShort(t);
} else if (param instanceof PNGEncodeParam.RGB) {
  int[] t = ((PNGEncodeParam.RGB)param).getTransparentRGB();
  cs.writeShort(t[0]);
  cs.writeShort(t[1]);

rgbTrans[2] = blueTransparentAlpha;
((PNGEncodeParam.RGB)encodeParam).
  setTransparentRGB(rgbTrans);