Java Programming

Hi all,

This is related to my other thread found here, although the Exception from that other thread is irrelevant now: http://forum.java.sun.com/thread.jspa?threadID=5200579.

Basically, I have an int array, and I want to convert it to a BufferedImage so I can save it to disk, and other fun stuff like that. I have a small idea of how to do it based on some code from DrLaszloJamf from awhile back.

I've been beating my head against the wall for about three days. Everywhere I search for information always comes up with crap like "convert bufferedimage to byte[]!!!!!". The API docs have about ten different classes for this, none of which seem to work, and all of which lead to two-three more classes.

The closest I've gotten is using createBandedRaster to create a WritableRaster. This unfortunately displays a completely black image, which is not what I want.

I am trying to take the int[], create a grayscale image out of it, add RGB values, and save it to disk.

I am absolutely stuck. I've tried using createPackedRaster; this gave me some crazy exceptions. I've tried using createInterleavedRaster; this is not compatible with DataBuffer.TYPE_INT. The closest I've gotten is outputting a completely black image with createBandedRaster.

Here's what I have at the moment:

// w = width, h = height, yes I need better variable names
private static BufferedImage toImage(byte[] data, int w, int h, int bitsPerPixel) {
        DataBuffer buffer;
        ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_GRAY);
        ColorModel cm;
        WritableRaster raster;
        // convertBytesToInts works fine. I have verified this multiple times. 
	buffer = new DataBufferInt(convertBytesToInts(data), data.length/2);
       	cm = new ComponentColorModel(cs, false, true, Transparency.OPAQUE, DataBuffer.TYPE_INT);
	raster = Raster.createBandedRaster(buffer, w, h, w, new int[] {0}, new int[] {0}, null);
        return new BufferedImage(cm, raster, false, null);
}

public static void createAndSaveImage(byte[] data, int width, int height, int bitsPerPixel) {
        File file = new File("/u/dgresh/pic.jpg");
	BufferedImage im = toImage(data, width, height, bitsPerPixel);
        BufferedImage out = createRGBImage(im);
        try {
                ImageIO.write(out, "jpeg", file);
        } catch (IOException e) {
                e.printStackTrace();
        }
        System.out.println("Image saved.");
}

private static BufferedImage createRGBImage(BufferedImage in) {
        BufferedImage output = new BufferedImage(in.getWidth(), in.getHeight(), BufferedImage.TYPE_INT_RGB);
        Graphics2D g = output.createGraphics();
        g.drawRenderedImage(in, null);
        g.dispose();
        return output;
}

Any help would be VERY, VERY much appreciated.

Thanks