How to use

isBackgroundSet

method

in

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

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();
  }
}

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();
  }
}

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();
  }
}

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();
  }
}