public void setPixels(int x, int y, int w, int h,
                          int iArray[], DataBuffer data) {
        int x1 = x + w;
        int y1 = y + h;

        if (x < 0 || x >= width || w > width || x1 < 0 || x1 > width ||
            y < 0 || y >= height || h > height || y1 < 0 || y1 >  height)
        {
            throw new ArrayIndexOutOfBoundsException
                ("Coordinate out of bounds!");
        }

        int lineOffset = y*scanlineStride + x;
        int srcOffset = 0;

        for (int i = 0; i < h; i++) {
           for (int j = 0; j < w; j++) {
               int value = data.getElem(lineOffset+j);
               for (int k=0; k < numBands; k++) {
                   value &= ~bitMasks[k];
                   int srcValue = iArray[srcOffset++];
                   value |= ((srcValue << bitOffsets[k])
                             & bitMasks[k]);
               }
               data.setElem(lineOffset+j, value);
           }
           lineOffset += scanlineStride;
        }
    }