java - 如何在 JavaFX 中保存对 ImageView 所做的更改？

Question

我在ImageView的帮助下向显示的图像添加了效果和颜色调整。 .

现在我想将这些更改保存到另一个文件中。我该如何执行此操作？

Answer 1

您需要snapshot与 fromFXImage 配对的 Node 类的功能SwingFXUtils 的方法。

Takes a snapshot of this node and returns the rendered image when it is ready. CSS and layout processing will be done for the node, and any of its children, prior to rendering it. The entire destination image is cleared to the fill Paint specified by the SnapshotParameters.

示例:

ImageView imageViewAdjusted = new ImageView(new Image(getClass().getResource("thinking-man.jpg").toExternalForm(), 250, 250, true, true));

ColorAdjust colorAdjust = new ColorAdjust();
colorAdjust.setContrast(0.9);

imageViewAdjusted.setEffect(colorAdjust);
imageViewAdjusted.setCache(true);
imageViewAdjusted.setCacheHint(CacheHint.SPEED);

Button btnSave = new Button("Save to File");
btnSave.setOnAction(new EventHandler<ActionEvent>() {

    @Override
    public void handle(ActionEvent event) {
        File outputFile = new File("D:/formattedPicture.png");
        BufferedImage bImage = SwingFXUtils.fromFXImage(imageViewAdjusted.snapshot(null, null), null);
        try {
            ImageIO.write(bImage, "png", outputFile);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }

    }
});