Swing图片ImageIcon对象到SWT图片Image对象的转换

本文转载自：http://bbs.chinaunix.net/viewthread.php?tid=871416
看到这个标题也许会觉得很奇怪，有这个必要吗？
答案是肯定的，说一种情况，比如代码复用，如果我曾经的项目中有一段程序是生成一个swing图片的，但是现在的界面要用swt实现了，我是不是应该将生 成swing图片的代码改成生成swt图片，如果时间允许，无可厚非，但是很多情况下不仅是时间不允许，更有可能只能生成swing图片。
下面转入正题，至于如何使用一段很长的代码产生一个swing图片就不说了，这里为了举例而举例，直接读入一个swing图片而后转换成swt图片，重要的是转换过程。

import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.awt.image.DirectColorModel;
import java.awt.image.ImageObserver;
import java.awt.image.WritableRaster;
import javax.swing.ImageIcon;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.ImageData;
import org.eclipse.swt.graphics.PaletteData;
import org.eclipse.swt.graphics.RGB;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;

/**
*
* Change javax.swing.ImageIcon object to org.eclipse.swt.graphics.Image object.
*
* @author Freshwind
*/
public class ImageConvertor {
public ImageConvertor() {
super();
}

/**
* change ImageIcon to BufferedImage
* @param icon
* @return
*/
public static BufferedImage getBufferedImage(ImageIcon icon){
int width = icon.getIconWidth();
int height = icon.getIconHeight();
ImageObserver observer = icon.getImageObserver();
BufferedImage bufferedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics gc = bufferedImage.createGraphics();
gc.drawImage(icon.getImage(), 0, 0, observer);
return bufferedImage;
}

/**
* change BufferedImage to ImageData
* @param bufferedImage
* @return
*/
public static ImageData getImageData(BufferedImage bufferedImage){
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, y, pixel);
}
}
return data;
}

public static void main(String[] args){
ImageIcon icon = new ImageIcon("C://temp//freshwind.jpg");
BufferedImage bufferedImage = getBufferedImage(icon);
ImageData data = getImageData(bufferedImage);

Display display = new Display();
Shell shell = new Shell(display);
shell.setText("Image Convertor by Freshwind");
shell.setLayout(new FillLayout());
shell.setBackground(new Color(display, new RGB(255, 255, 255)));
shell.setSize(350, 100);

Label label = new Label(shell, SWT.NONE);
//new Image with ImageData which is generated previously.
Image image = new Image(display, data);
label.setImage(image);
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
}

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