Swing/RatingLabel のバックアップの現在との差分(No.8)

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private final ImageProducer ip = orgIcon.getImage().getSource();
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private static ImageIcon makeStarImageIcon(
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    ImageProducer ip, float rf, float gf, float bf) {
  return new ImageIcon(Toolkit.getDefaultToolkit().createImage(
    new FilteredImageSource(ip, new SelectedImageFilter(rf, gf, bf))));
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}
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#screenshot
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class SelectedImageFilter extends RGBImageFilter {
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  private final float rf;
  private final float gf;
  private final float bf;

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**サンプルコード [#a85a2963]
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#code{{
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private final ImageProducer ip = orgIcon.getImage().getSource();
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private ImageIcon makeStarImageIcon(float[] filter) {
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  SelectedImageFilter sif = new SelectedImageFilter(filter);
  return new ImageIcon(
    createImage(new FilteredImageSource(ip, sif)));
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}
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private class SelectedImageFilter extends RGBImageFilter {
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  private final float[] filter;
  public SelectedImageFilter(float[] filter) {
    this.filter = filter;
    canFilterIndexColorModel = true;
  protected SelectedImageFilter(float rf, float gf, float bf) {
    super();
    this.rf = Math.min(1f, rf);
    this.gf = Math.min(1f, gf);
    this.bf = Math.min(1f, bf);
    canFilterIndexColorModel = false;
  }
  public int filterRGB(int x, int y, int argb) {
    Color color = new Color(argb, true);
    float[] array = new float[4];
    color.getComponents(array);
    return new Color(array[0]*filter[0],
                     array[1]*filter[1],
                     array[2]*filter[2],
                     array[3]).getRGB();
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  @Override public int filterRGB(int x, int y, int argb) {
    int r = (int) (((argb >> 16) & 0xFF) * rf);
    int g = (int) (((argb >> 8) & 0xFF) * gf);
    int b = (int) ((argb & 0xFF) * bf);
    return (argb & 0xFF_00_00_00) | (r << 16) | (g << 8) | (b);
  }
}