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Set Image Color as Transparent

/ Published in: Java
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nifty little function when you want transparent images such as sprite sheets

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  1. public Image makeColorTrans(Image im,final Color c)
  2.     {
  3.         ImageFilter filter = new RGBImageFilter()
  4.         {
  5.       // the color we are looking for... Alpha bits are set to opaque
  6.       public int markerRGB = c.getRGB() | 0xFF000000;
  7.  
  8.       public final int filterRGB(int x, int y, int rgb) {
  9.         if ( ( rgb | 0xFF000000 ) == markerRGB ) {
  10.           // Mark the alpha bits as zero - transparent
  11.           return 0x00FFFFFF & rgb;
  12.           }
  13.         else {
  14.           // nothing to do
  15.           return rgb;
  16.           }
  17.         }
  18.       };
  19.  
  20.     ImageProducer ip = new FilteredImageSource(im.getSource(), filter);
  21.     return Toolkit.getDefaultToolkit().createImage(ip);
  22.     }

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