PixelGrabber is too slow and has memory problems!

Question

Have any of you figured out a way to get pixels from an Image
WITHOUT using PixelGrabber??
PixelGrabber is really slow -- is a memory hog -- and has other problems
that cause me to need another way to get pixels from an image.
Does anyone else have a way to get the pixels directly from an Image
without using PixelGrabber?
Ken Warner

Answer 1

Hi, there are ways to do it if you can live with certain restrictions.
            BufferedImage img=new BufferedImage(32,32,BufferedImage.TYPE_INT_ARGB);
            img.setRGB(10,15,0x01020304);   // a=1 r=2 g=3 b=4
            WritableRaster r=img.getRaster();
            DataBuffer db=r.getDataBuffer();
            if (db.getDataType() != DataBuffer.TYPE_INT)
                throw new IllegalStateException("Hey that must be a int!");
            if (db.getNumBanks() != 1)
                throw new IllegalStateException("Uh - Someone else got to do this job!");
            DataBufferInt dbi=(DataBufferInt)db;
            int[] data=dbi.getData();           
            System.out.println(" Pixel (10,15) = "+Integer.toHexString(data[10+32*15]));
            // Test: No coy
            data[10+32*15]=0xaabbccdd;
            System.out.println(" Pixel (10,15) = "+Integer.toHexString(data[10+32*15]));As you see it works best if you can set the pixel format and if it only contains a single array of data (i.e. bank).