Blurry render of SwingNode

[Michael Paus]

Hi,
this is not a bug reporting list. Please file your bug report here
https://bugs.java.com/bugdatabase/ instead.
Best regards
Michael

Am 22.08.20 um 19:57 schrieb Thangalin:
> Ahoy list,
>
> Running OpenJDK 14.0.1 on Windows 7, adding a SwingNode to a SplitPane
> causes the contents of the SwingNode to appear blurry. There's a full
> write-up with screen-shots at:
> https://stackoverflow.com/q/63444771/59087
>
> Here's an SSCCE that demonstrates the problem:
>
> import javafx.application.Application;
> import javafx.embed.swing.SwingNode;
> import javafx.scene.Scene;
> import javafx.scene.control.SplitPane;
> import javafx.scene.layout.StackPane;
> import javafx.scene.layout.VBox;
> import javafx.stage.Stage;
>
> import javax.swing.*;
> import java.awt.*;
>
> import static javafx.application.Platform.runLater;
> import static javax.swing.SwingUtilities.invokeLater;
>
> public class FlyingSourceTest extends Application {
>    public static void main( String[] args ) {
>      Application.launch( args );
>    }
>
>    @Override
>    public void start( Stage stage ) {
>      invokeLater( () -> {
>        stage.setTitle( "SSCCE" );
>
>        final var size = 120f;
>        final var font = new javafx.scene.text.Font( "Arial", size );
>        final var bgStyle = "-fx-background-color: white";
>
>        // FX label, StackPane
>        final var fxLabelTop = new javafx.scene.text.Text( "FX/FX" );
>        fxLabelTop.setFont( font );
>        final var fxStackPaneTop = new StackPane( fxLabelTop );
>
>        // FX label, StackPane
>        final var fxLabelSplit = new javafx.scene.text.Text( "FX LABEL" );
>        fxLabelSplit.setFont( font );
>        final var fxLabelPane = new StackPane();
>        fxLabelPane.getChildren().addAll( fxLabelSplit );
>        fxLabelPane.setStyle( bgStyle );
>
>        // Swing label, StackPane
>        final var swingLabel = new JLabel( "SW LABEL" );
>        swingLabel.setBackground( Color.WHITE );
>        swingLabel.setOpaque( true );
>        swingLabel.setFont( swingLabel.getFont().deriveFont( Font.PLAIN, size ) );
>        final var swingLabelNode = new SwingNode();
>        swingLabelNode.setContent( swingLabel );
>        final var swingLabelPane = new StackPane( swingLabelNode );
>        swingLabelPane.setStyle( bgStyle );
>
>        final var fxSplitPane = new SplitPane(
>            fxLabelPane, swingLabelPane );
>        fxSplitPane.setPrefSize( 1280, 300 );
>
>        final var root = new VBox();
>        root.getChildren().addAll( fxStackPaneTop, fxSplitPane );
>        root.setStyle( bgStyle );
>
>        runLater( () -> {
>          final var scene = new Scene( root );
>          stage.setScene( scene );
>          stage.show();
>        } );
>      } );
>    }
> }
>
> Closely compare the "L" from "SW LABEL" to the "L" from "FX LABEL".
> You'll see that the "SW LABEL" ell has what looks like stronger
> antialiasing applied.
>
> Changing the Graphics2D rendering hints on the JLabel has no effect.
> Changing the JLabel's AffineTransform to shift by 0.5px worsens the
> blurriness. Moving the SwingNode out of the SplitPane renders crisply,
> as expected. The font colours and background do not affect the
> outcome, but are there to make consistent output, which makes
> comparing easier.
>
> This problem affects neither X11 (Linux) nor OSX, only Windows.
>
> Been trying to fix this for several days without success.
>
> Any ideas why embedding a SwingNode within a SplitPane causes a blurry
> effect? And how can the problem be resolved?
>
> Thank you!