On Tue, 2 Jul 2024 20:04:39 GMT, Alexander Zvegintsev <azveg...@openjdk.org> 
wrote:

>> Most of the headful test failures on XWayland are due to screen capture is 
>> not working.
>> 
>> Wayland, unlike X11, does not allow arbitrary applications to capture the 
>> screen contents directly.
>> Instead, screen capture functionality is managed by the compositor, which 
>> can enforce stricter controls and permissions, requiring explicit user 
>> approval for screen capture operations.
>> 
>> This issue is already resolved in OpenJDK ([base 
>> issue](https://bugs.openjdk.org/browse/JDK-8280982), there are  subsequent 
>> fixes) by using the [ScreenCast XDG 
>> portal](https://flatpak.github.io/xdg-desktop-portal/docs/doc-org.freedesktop.portal.ScreenCast.html).
>> 
>> The XDG ScreenCast portal is utilized for capturing screen data as it 
>> provides a secure and standardized method for applications to access screen 
>> content.
>> Additionally, it allows for the reuse of user permissions without requiring 
>> repeated confirmations, streamlining the user experience and enhancing 
>> convenience.
>> 
>> 
>> <hr>
>> 
>> So this changeset is a copy of the OpenJDK fixes with the addition of the 
>> JavaFX customization. 
>> For ease of review, you can skip the changes in the first two commits:
>> - First commit is a direct copy of files from OpenJDK
>> - Second commit removes the `gtk-` prefix before the `gtk_...` and `g_...` 
>> function calls (in AWT all gtk functions are dynamically loaded, we don't 
>> need that in JavaFX).
>> 
>> properties added:
>> 
>> - `javafx.robot.screenshotMethod`, accepts `gtk`(existing gtk method) and 
>> `dbusScreencast`(added by this changeset, used by default for Wayland)
>> - `javafx.robot.screenshotDebug` prints debug info if it is set to `true`
>> 
>> <hr>
>> 
>> What are the remaining issues?
>> 
>> 1. https://bugs.openjdk.org/browse/JDK-8335468
>> 
>> After applying this fix, system tests will pass except for the 
>> `SwingNodeJDialogTest` test.
>> 
>> This interop test calls `java.awt.Robot#getPixelColor` which internally 
>> `gtk->g_main_context_iteration(NULL, TRUE);` causes a blocking of javafx gtk 
>> loop, so the test hangs.
>> So a change is required on OpenJDK side to fix this issue.
>> 
>> 2. https://bugs.openjdk.org/browse/JDK-8335470
>> 
>> Even after solving the `#1`, the 
>> `SwingNodeJDialogTest.testNodeRemovalBeforeShow` case is still failing.
>> 
>> 3. https://bugs.openjdk.org/browse/JDK-8335469
>> 
>> Internally the ScreenCast session keeps open for 
>> [2s](https://github.com/openjdk/jdk/blob/d457609f700bbb1fed233f1a04501c995852e5ac/src/java.desktop/unix/classes/sun/awt/screencast/ScreencastHelper.java#L62).
> ...
>
> Alexander Zvegintsev has updated the pull request incrementally with one 
> additional commit since the last revision:
> 
>   fix default token path

modules/javafx.graphics/src/main/java/com/sun/javafx/geom/Dimension.java line 
39:

> 37:     }
> 38: 
> 39:     public boolean equals(Object obj) {

[JDK-8335633](https://bugs.openjdk.org/browse/JDK-8335633)
Missing @Override in Dimension

-------------

PR Review Comment: https://git.openjdk.org/jfx/pull/1490#discussion_r1664551499

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