java – 从BufferedImage到SWT Image的转换

public static ImageData convertToSWT(BufferedImage bufferedImage) {
    if (bufferedImage.getColorModel() instanceof DirectColorModel) {
        DirectColorModel colorModel = (DirectColorModel) bufferedImage.getColorModel();
        PaletteData palette = new PaletteData(
            colorModel.getRedMask(),colorModel.getGreenMask(),colorModel.getBlueMask()
        );
        ImageData data = new ImageData(
            bufferedImage.getWidth(),bufferedImage.getHeight(),colorModel.getPixelSize(),palette
        );
        WritableRaster raster = bufferedImage.getRaster();
        int[] pixelArray = new int[3];
        for (int y = 0; y < data.height; y++) {
            for (int x = 0; x < data.width; x++) {
                raster.getPixel(x,y,pixelArray);
                int pixel = palette.getPixel(
                    new RGB(pixelArray[0],pixelArray[1],pixelArray[2])
                );
                data.setPixel(x,pixel);
            }
        }
        return data;
    } else if (bufferedImage.getColorModel() instanceof IndexColorModel) {
        IndexColorModel colorModel = (IndexColorModel) bufferedImage.getColorModel();
        int size = colorModel.getMapSize();
        byte[] reds = new byte[size];
        byte[] greens = new byte[size];
        byte[] blues = new byte[size];
        colorModel.getReds(reds);
        colorModel.getGreens(greens);
        colorModel.getBlues(blues);
        RGB[] rgbs = new RGB[size];
        for (int i = 0; i < rgbs.length; i++) {
            rgbs[i] = new RGB(reds[i] & 0xFF,greens[i] & 0xFF,blues[i] & 0xFF);
        }
        PaletteData palette = new PaletteData(rgbs);
        ImageData data = new ImageData(
            bufferedImage.getWidth(),palette
        );
        data.transparentPixel = colorModel.getTransparentPixel();
        WritableRaster raster = bufferedImage.getRaster();
        int[] pixelArray = new int[1];
        for (int y = 0; y < data.height; y++) {
            for (int x = 0; x < data.width; x++) {
                raster.getPixel(x,pixelArray);
                data.setPixel(x,pixelArray[0]);
            }
        }
        return data;
    }
    return null;
}

(见于：http://www.java2s.com/Code/Java/SWT-JFace-Eclipse/ConvertsabufferedimagetoSWTImageData.htm).

我测试过它,它运行得很好.问题是我不理解它(我最好的猜测是它使用两者的原始数据接口来进行传输).在我看来,一个更简单的解决方案是将BufferedImage写入ByteArrayOutputStream,然后将其读回SWT Image withByteArrayInputStream.这个解决方案有什么问题吗？速度怎么样？

这种转换是必要的,因为所有图像大小调整库都用于AWT,但我用SWT显示图像.

谢谢！