A DESCRIPTION OF THE PROBLEM :
**The Problem**

JavaFX's default way of getting an image from the Windows clipboard, `Clipboard.getSystemClipboard().getImage();`, appears to be broken.

Something seems to go wrong with the transparency of the image. Set on a black background, the image appears fine, but set on a white background, nothing shows at all.

Here's an animation demonstrating that: https://i.stack.imgur.com/TgszF.gif

The provided source code allows easy comparison between the JavaFX and AWT clipboards.

**What I Know**

This problem with images doesn't occur on the AWT clipboard, just the JavaFX clipboard.

*Problem Applications*

JavaFX seems to have this same transparency problem with various applications that copy an image to the clipboard:

    Adobe Reader (from a PDF with images)
    Foxit Reader (from a PDF with images)
        Here's a pdf with an image, for your convenience: https://drive.google.com/file/d/1waZRrQM6VTN1YzaVSHkxDIzV456Jqi0y/view?usp=sharing
    Microsoft Word 365 (from a .docx file with images)
        Here's a .docx file with an image, for your convenience: https://drive.google.com/file/d/1s3anuuIXZ4NcJGAbpYakwgqH_YAGPo9x/view?usp=sharing
    Windows 7's Paint (.png, .jpg, .gif, .bmp)
    Greenshot (which is an enhanced screenshot utility)
    Firefox 65.0.2 (copying the Google.com logo)

*Applications Without The Issue*

I've also found a few applications that copy an image to the clipboard and JavaFX can pull it out using the default method no problem:

    Paint.net
    The PrtScn button
    The Windows Snipping Tool
    Google Chrome 72.0.3626.121 (copying the Google.com logo)


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1. Copy an image from practically any application
[I've been able to replicate this problem with the following applications:
    Adobe Reader (from a PDF with images)
    Foxit Reader (from a PDF with images)
    Microsoft Word 365 (from a .docx file with images)
    Windows 7's Paint (.png, .jpg, .gif, .bmp)
    Greenshot (which is an enhanced screenshot utility)
    Firefox 65.0.2 (copying the Google.com logo)
]
2. Try to create and display an Image from the image copied to the JavaFX Clipboard.




EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
An image that maintains the same properties as the image that was copied
ACTUAL -
When displayed over something black, the image appears fine, when displayed over something white, no color shows. When displayed on a color in between, various colors do not display correctly, if at all.

Here's an animation of the actual result on numerous backgrounds, using a TV color testing graphic: https://i.stack.imgur.com/TgszF.gif

---------- BEGIN SOURCE ----------
// Instructions: This program allows you to easily compare the JavaFX and the Swing/AWT clipboard.
// First copy an image from some application.
// JavaFX button -> paste the image from the JavaFX clipboard.
// AWT button -> paste the image from the AWT clipboard.
// Use the color changer at the top to see how the image changes based on background that
// the image is displayed on.

package sample;

import com.sun.glass.ui.ClipboardAssistance;
import javafx.application.Application;
import javafx.embed.swing.SwingFXUtils;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Alert;
import javafx.scene.control.Button;
import javafx.scene.control.ColorPicker;
import javafx.scene.control.Label;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.input.Clipboard;
import javafx.scene.layout.Background;
import javafx.scene.layout.BackgroundFill;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.CornerRadii;
import javafx.stage.Stage;

import java.awt.*;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.io.IOException;

/**
 * A program to test out the differences between the AWT Java Clipboard and the JavaFX Clipboard.
 * <p>
 * Based on the code by crusam: https://stackoverflow.com/q/48932575/5432315
 */
public class ClipBoardFxAwtComparison extends Application {

    @Override
    public void start(final Stage primaryStage) {
        final BorderPane root = new BorderPane();
        final ImageView view = new ImageView();

        final Button awtButton = new Button("AWT");
        awtButton.setOnAction(event -> loadImageFromAwtClipboard(view));

        final Button javaFXButton = new Button("JavaFX");
        javaFXButton.setOnAction(event -> loadImageFromJavaFXClipboard(view));

        root.setCenter(view);

        final BorderPane buttonPane = new BorderPane();
        buttonPane.setLeft(awtButton);
        buttonPane.setCenter(new Label("Copy and image then click a button to paste it."));
        buttonPane.setRight(javaFXButton);
        root.setBottom(buttonPane);

        final ColorPicker colorPicker = new ColorPicker();
        colorPicker.setOnAction(event -> {
            root.setBackground(
                    new Background(
                            new BackgroundFill(
                                    colorPicker.getValue(),
                                    CornerRadii.EMPTY,
                                    Insets.EMPTY)
                    )
            );
        });

        BorderPane.setAlignment(colorPicker, Pos.CENTER);
        root.setTop(colorPicker);

        final Scene scene = new Scene(root, 400, 400);
        primaryStage.setScene(scene);
        primaryStage.show();

        listenToClipboard();
    }

    /**
     * This little bit of magic comes courtesy of Александр Савостьянов: https://stackoverflow.com/a/47550034/5432315
     */
    private void listenToClipboard() {
        Clipboard clipboard = Clipboard.getSystemClipboard();
        new ClipboardAssistance(com.sun.glass.ui.Clipboard.SYSTEM) {
            @Override
            public void contentChanged() {
                System.out.println("System clipboard content changed.");
                System.out.println("Clipboard content types: ");
                clipboard.getContentTypes().forEach(System.out::println);
                System.out.println();
            }
        };
    }

    private void loadImageFromJavaFXClipboard(final ImageView view) {
        System.out.println("Adding an image from the JavaFX Clipboard...");
        final Clipboard clipboard = Clipboard.getSystemClipboard();

        if (clipboard.hasImage()) {
            final Image image = clipboard.getImage();
            view.setImage(image);
        } else {
            new Alert(Alert.AlertType.INFORMATION, "No image detected on the Clipboard!").show();
        }
    }

    private void loadImageFromAwtClipboard(final ImageView view) {
        System.out.println("Adding an image from the AWT Clipboard...");

        try {
            final Transferable t = Toolkit.getDefaultToolkit().getSystemClipboard().getContents(null);

            if (t != null && t.isDataFlavorSupported(DataFlavor.imageFlavor)) {
                final java.awt.image.BufferedImage img = (java.awt.image.BufferedImage) t.getTransferData(DataFlavor.imageFlavor);

                final Image image = SwingFXUtils.toFXImage(img, null);

                view.setImage(image);
            } else {
                new Alert(Alert.AlertType.INFORMATION, "No image detected on the Clipboard!").show();
            }
        } catch (final UnsupportedFlavorException | IOException e) {
            e.printStackTrace();
        }
    }

    public static void main(final String[] args) {
        launch(args);
    }
}
---------- END SOURCE ----------

FREQUENCY : always