Change IndexColorModel to create palette effect?

Question

Here's one for you... Is there an easy way to change the palette in the IndexColorModel of a BufferedImage?
Here's what I'm doing: I've got an 8-bit IndexColorModel with some palette values set. I use that to create the BufferedImage, and then get a WritableRaster from that to create the graphics data. Basically, it's something like this:cm=new IndexColorModel(8,256,ra,ga,ba); // ra, ga, and ba are short for "red array" et cetera.
myimage=new BufferedImage(width,height,BufferedImage.TYPE_BYTE_INDEXED,cm);
WritableRaster r=image.getRaster();All of this is relatively simple everyday stuff, I'm sure, to the experienced Java 2D programmer.
Here's the fun part, though... I want to be able to specify a different palette every time I draw this BufferedImage to the screen (specifically, a Graphics2D from either a Frame or an Applet). I'll pass three 256-byte arrays (red, green, and blue) to a function which will use those colors to draw the BufferedImage. (This is to create some rather unusual color effects, naturally.)
Now it seems like it should be possible to do this by creating a new IndexColorModel every time, and using that and the existing BufferedImage's Raster to create a new BufferedImage, but that seems excessively wasteful. This is for a game, too, so performance is an important issue; I'd rather not waste time with wanton creation and destruction of hundreds of BufferedImage objects every second.
Is there a better way?

Answer 1

I would like to re-open this thread, Mr. Kglad, I did exactly what you told me, and you were right in everything, nevertheless, the effect like the  "relief" when the country brings out for a second and go back to its original position it's special, if you look at THIS map you can see the effect clearly, and as you can see the selected county "bounce" (I don't know if that make any sense) and go back to it's place while the mouse is over, that's the effect I want to achieve, is there any special event in AS3 in order to do that? it's seems like a mix of fade in and out... and lots of things.
Thank you very much for all of your help, anybody who could know the answer please give me a hand