JavaFX图像序列化

Question

有没有办法序列化javafx.scene.image.Image？

我发现只有一种方法:创建自己的可序列化类,以像素格式(byte [] [])存储图像数据.我无法相信JavaFX没有用于图像序列化的内置机制.

这是我的SerializableImage类.

import javafx.scene.image.Image;
import javafx.scene.image.PixelReader;
import javafx.scene.image.PixelWriter;
import javafx.scene.image.WritableImage;

import java.io.Serializable;


public class SerializableImage implements Serializable {
    private int width, height;
    private int[][] data;

    public SerializableImage() {}

    public void setImage(Image image) {
        width = ((int) image.getWidth());
        height = ((int) image.getHeight());
        data = new int[width][height];

        PixelReader r = image.getPixelReader();
        for (int i = 0; i < width; i++) {
            for (int j = 0; j < height; j++) {
                data[i][j] = r.getArgb(i, j);
            }
        }

    }

    public Image getImage() {
        WritableImage img = new WritableImage(width, height);

        PixelWriter w = img.getPixelWriter();
        for (int i = 0; i < width; i++) {
            for (int j = 0; j < height; j++) {
                w.setArgb(i, j, data[i][j]);
            }
        }

        return img;
    }

}

Answer 1

通常,您可以通过将图像存储为常规图像格式来保留(或流式传输)图像,您可以通过创建java.awt.image.BufferedImage表示并使用javax.imageio.ImageIOAPI 来执行此操作:

Image image = ... ;
ImageIO.write(SwingFXUtils.fromFXImage(image, null), "png", ...); 

第三个参数ImageIO.write(...)可以是a File或OutputStream.

如果您想要Image创建一个可序列化的类,其中包含一个,您可以创建一个自定义的序列化表单:

public class SomeClass implements Serializable {
    private transient Image image ;

    // other fields, etc...

    private void readObject(ObjectInputStream s) throws IOException, ClassNotFoundException {
        s.defaultReadObject();
        image = SwingFXUtils.toFXImage(ImageIO.read(s), null);
    }

    private void writeObject(ObjectOutputStream s) throws IOException {
        s.defaultWriteObject();
        ImageIO.write(SwingFXUtils.fromFXImage(image, null), "png", s);
    }
}