Re: Cannot load jpeg images on Fedora 34

[Robert Lichtenberger]

I've analysed the problem described below and found out that:
* When building JavaFX from master-branch, the problem is gone

* When building from tags/16+8, the problem is present

And finally I found https://bugs.openjdk.java.net/browse/JDK-8211362 
(Restrict export of libjpeg symbols from libjavafx_iio.so) together with 
https://git.openjdk.java.net/jfx/pull/442 from Johan Vos.

When I apply the changes in buildSrc/linux.gradle to tags/16+8, the 
problem goes away.

I also found out that Fedora 34 is not the only Linux distribution 
affected by the problem.

So the good news is, the problem will probably vanish with JavaFX 17. 
But the question remains whether the fix should be backported, since a 
lot of JavaFX applications will not work correctly under various modern 
Linux distributions.


Best regards,

Robert


Am 6/2/21 um 12:43 PM schrieb Robert Lichtenberger:
Using this testapplication:

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;

public class ImageTest extends Application {

    @Override
    public void start(Stage stage) throws Exception {

        Image img = new 
Image("https://www.synedra.com/_thumbnails_/606_11_robert_lichtenberger.jpg";);
        if (img.isError()) {
            System.out.println(img.getException());
        }
        ImageView imgView = new ImageView(img);

        StackPane stack = new StackPane();
        stack.getChildren().add(imgView);
        Scene scene = new Scene(stack, 640, 480);
        stage.setScene(scene);
        stage.show();
    }

    public static void main(String[] args) {
        launch();
    }
}

And running it with regular JavaFX-16 (downloaded from gluonhq), I get:

[rli@rlimbus javafx]$ java --module-path 
/home/rli/Downloads/javafx-sdk-16/lib --add-modules 
javafx.controls,javafx.fxml ImageTest
java.io.IOException: Wrong JPEG library version: library is 62, caller 
expects 90

and the image will not be loaded.

The same happens for all other regular JavaFX SDKs (even tried LTS 
11.0.12).

When I compile JavaFX myself, it works as expected:

[rli@rlimbus javafx]$ java --module-path 
/home/rli/PWEs/jfx/build/sdk/lib --add-modules 
javafx.controls,javafx.fxml ImageTest

The problem seems to be related to the OS version, because on Fedora 
33 everything works fine.

Other applications are also impacted, e.g. AsciidocFX cannot show 
previews of jpeg images on Fedora 34.

Any hints / ideas appreciated.

Robert