How to output the content of scene graphics in JavaFX 2 to images

How to output the content of scene graph in JavaFX 2 to image In fact, I'm developing an application that basically designs cards Therefore, users can customize the scene by clicking various options Finally, I want to export the scene content to the image file What do I do?

Solution

A new snapshot function appears in FX 2.2 You can say

WritableImage snapshot = scene.snapshot(null);

With the old FX, you can use AWT robot This is not a good method because it requires the entire AWT stack to start

// getting screen coordinates of a node (or whole scene)
            Bounds b = node.getBoundsInParent(); 
            int x = (int)Math.round(primaryStage.getX() + scene.getX() + b.getMinX());
            int y = (int)Math.round(primaryStage.getY() + scene.getY() + b.getMinY());
            int w = (int)Math.round(b.getWidth());
            int h = (int)Math.round(b.getHeight());
            // using ATW robot to get image
            java.awt.Robot robot = new java.awt.Robot();
            java.awt.image.BufferedImage bi = robot.createScreenCapture(new java.awt.Rectangle(x,y,w,h));
            // convert BufferedImage to javafx.scene.image.Image
            java.io.ByteArrayOutputStream stream = new java.io.ByteArrayOutputStream();
            // or you can write directly to file instead
            ImageIO.write(bi,"png",stream);
            Image image = new Image(new java.io.ByteArrayInputStream(stream.toByteArray()),h,true,true);