Pixelated result when trying to print a Node including an image from JavaFx

Question

i stumbled upon a problem trying to print (to a printer or a pdf) an image through JavaFx. My code works and prints, but pixelates (downgrades quality) on every picture that i try to print.

My code is

 package testingprinting; import java.io.File; import java.net.MalformedURLException; import java.util.Iterator; import javafx.application.Application; import javafx.event.ActionEvent; import javafx.event.EventHandler; import javafx.geometry.Insets; import javafx.geometry.Pos; import javafx.print.PageLayout; import javafx.print.PageOrientation; import javafx.print.Paper; import javafx.print.Printer; import javafx.print.PrinterJob; import javafx.scene.Scene; import javafx.scene.control.Button; import javafx.scene.image.Image; import javafx.scene.image.ImageView; import javafx.scene.layout.ColumnConstraints; import javafx.scene.layout.GridPane; import javafx.scene.layout.StackPane; import javafx.scene.layout.VBox; import javafx.scene.transform.Scale; import javafx.stage.Stage; /** * * @author me */ public class TestingPrinting extends Application { @Override public void start(Stage primaryStage) throws MalformedURLException { GridPane leftGridPane = new GridPane(); leftGridPane.getColumnConstraints().add(new ColumnConstraints(25)); leftGridPane.getColumnConstraints().add(new ColumnConstraints(25)); leftGridPane.getColumnConstraints().add(new ColumnConstraints(25)); leftGridPane.getColumnConstraints().add(new ColumnConstraints(25)); leftGridPane.getColumnConstraints().add(new ColumnConstraints(25)); leftGridPane.getColumnConstraints().add(new ColumnConstraints(25)); leftGridPane.getColumnConstraints().add(new ColumnConstraints(25)); leftGridPane.getColumnConstraints().add(new ColumnConstraints(25)); leftGridPane.getColumnConstraints().add(new ColumnConstraints(824)); VBox root = new VBox(1); root.getChildren().add(leftGridPane); Scene scene = new Scene(root, 1024, 800); primaryStage.setTitle("Print Testing"); primaryStage.setScene(scene); primaryStage.show(); Image testImage = new Image(new File("C:\\\\Users\\\\me\\\\Documents\\\\800px-Gull_portrait_ca_usa.JPG").toURI().toURL().toExternalForm()); ImageView testImageImageView = new ImageView(); testImageImageView.setFitWidth(800); testImageImageView.setFitHeight(600); testImageImageView.setImage(testImage); leftGridPane.add(testImageImageView,0,0,9,1); Button printButton = new Button("Print"); root.getChildren().add(printButton); printButton.setOnAction(e -> { //Printer pdfPrinter = null; Iterator<Printer> iter = Printer.getAllPrinters().iterator(); while (iter.hasNext()) { Printer printer = iter.next(); if (printer.getName().endsWith("PDF")) { // pdfPrinter = printer; } } Printer printer = Printer.getDefaultPrinter(); PageLayout pageLayout = printer.createPageLayout(Paper.NA_LETTER, PageOrientation.PORTRAIT, Printer.MarginType.DEFAULT); double scaleX = pageLayout.getPrintableWidth() / leftGridPane.getBoundsInParent().getWidth(); double scaleY = pageLayout.getPrintableHeight() / leftGridPane.getBoundsInParent().getHeight(); //leftGridPane.getTransforms().add(new Scale(scaleX, scaleY)); PrinterJob job = PrinterJob.createPrinterJob(); if(job != null){ System.out.println("Job is not null"); job.showPrintDialog(primaryStage); // Window must be your main Stage job.printPage(leftGridPane); job.endJob(); } else { job.cancelJob(); System.out.println("Job is null");} } ); } public static void main(String[] args) { launch(args); } } 

and as you can see on the picture that i snipped 1. is from printing and the image is pixelated and 2. is from the code that i run and it is not pixelated. side by side comparison

does any one has an idea how to solve this?

Thank you in advance.

Answer 1

What you could try is setting the print quality to high on the printer job. After you create the printer job call

job.getJobSettings().setPrintQuality(PrintQuality.HIGH);

I haven't had time to try it but it might help.