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<p>This commit fixes the problem when the property is set to false
and it shows up again if the property is not set to false</p>
<div class="moz-cite-prefix">On 03/12/2025 5:54 PM, Lukasz Kostyra
wrote:<br>
</div>
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<p class="MsoNormal"><span lang="EN-US">Hi Christopher,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I did not find the way
to reproduce this locally, but I found a problem with one of
the optimizations that is in the backend. To double check if
that is in fact the issue I pushed
<a
href="https://github.com/openjdk/jfx-sandbox/commit/7078d621dc282ab8439800b84b78377dec3eea89"
moz-do-not-send="true" class="moz-txt-link-freetext">
https://github.com/openjdk/jfx-sandbox/commit/7078d621dc282ab8439800b84b78377dec3eea89</a>
to disable the optimization (it is on by default, disabling
it fixes that specific problem on my end) and I’d like to
double-check if this is the correct lead.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">When you have a moment,
could you build JFX with that change and run your app with
“-Dprism.d3d12.clearOpts=false” added to the command line?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">If the problem persists
with prism.d3d12.clearOpts set to false I would need some
more information on how these labels are rendered to track
this down.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">-Lukasz<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<div
style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span lang="EN-US"
style="mso-ligatures:none;mso-fareast-language:#0C00">From:</span></b><span
lang="EN-US"
style="mso-ligatures:none;mso-fareast-language:#0C00">
Christopher Schnick <a class="moz-txt-link-rfc2396E" href="mailto:crschnick@xpipe.io"><crschnick@xpipe.io></a>
<br>
<b>Sent:</b> Friday, 28 November 2025 13:25<br>
<b>To:</b> Lukasz Kostyra
<a class="moz-txt-link-rfc2396E" href="mailto:lukasz.kostyra@oracle.com"><lukasz.kostyra@oracle.com></a><br>
<b>Cc:</b> OpenJFX <a class="moz-txt-link-rfc2396E" href="mailto:openjfx-dev@openjdk.org"><openjfx-dev@openjdk.org></a><br>
<b>Subject:</b> [External] : Re: JavaFX Direct3D 12 -
Second EA release<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p>I did not encounter the vanishing issue anymore with that
build, so at least it is usable.<o:p></o:p></p>
<p>However, the font rendering issue still exists for some
nodes:<o:p></o:p></p>
<p><img border="0" width="810" height="247"
style="width:8.4375in;height:2.5729in" id="_x0000_i1026"
src="cid:part1.X09ZTuPL.wp6Ov5is@xpipe.io" class=""><o:p></o:p></p>
<p>It is not deterministic, meaning that if I just scroll the
scrollpane forward and back, the same text might get rendered
correctly.<o:p></o:p></p>
<p>Also, did you see the performance results I posted for my AMD
system? Performance was quite bad there, so this is not in a
stage where I can test this in production a bit.<o:p></o:p></p>
<div>
<p class="MsoNormal">On 28/11/2025 12:41, Lukasz Kostyra
wrote:<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal"><span lang="PL">Hi Christopher,</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="PL"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">I just pushed a fix
for JDK-8371995 onto direct3d12 branch in the sandbox -
<a
href="https://urldefense.com/v3/__https:/github.com/openjdk/jfx-sandbox/tree/direct3d12__;!!ACWV5N9M2RV99hQ!KuiGt3yDg1iNtCswOA3yLUbPKFpTnRKQE9clxnsd6xQRhnGJLoz7c697JC77xG2Q4qwsMWDePar6hRx9DY1uTPpy$"
moz-do-not-send="true">
https://github.com/openjdk/jfx-sandbox/tree/direct3d12</a>
. If you find a moment, could you build JFX from that
branch and check if your app works correctly?</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">-Lukasz</span><o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<div>
<div
style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span lang="EN-US"
style="mso-ligatures:none;mso-fareast-language:#0C00">From:</span></b><span
lang="EN-US"
style="mso-ligatures:none;mso-fareast-language:#0C00">
openjfx-dev
<a href="mailto:openjfx-dev-retn@openjdk.org"
moz-do-not-send="true"><openjfx-dev-retn@openjdk.org></a>
<b>
On Behalf Of </b>Lukasz Kostyra<br>
<b>Sent:</b> Monday, 17 November 2025 15:14<br>
<b>To:</b> Christopher Schnick <a
href="mailto:crschnick@xpipe.io"
moz-do-not-send="true"><crschnick@xpipe.io></a><br>
<b>Cc:</b> OpenJFX <a
href="mailto:openjfx-dev@openjdk.org"
moz-do-not-send="true"><openjfx-dev@openjdk.org></a><br>
<b>Subject:</b> RE: Re: JavaFX Direct3D 12 - Second EA
release</span><o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">I might’ve found the
problem, there is an assertion that triggers when multiple
text objects using different fonts are drawn. It could be
related (AFAIK Label controls will eventually end up at
the same text rendering routines as Text nodes).
Assertions are compiled out on Release for performance, so
there is a chance it would corrupt the rendering without
anything meaningful shown on screen.<br>
<br>
To track this I just filed <a
href="https://bugs.openjdk.org/browse/JDK-8371995"
moz-do-not-send="true" class="moz-txt-link-freetext">
https://bugs.openjdk.org/browse/JDK-8371995</a> . I will
check it and let you know when I fix it.</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">On your side It might
still be handy to build JFX in DebugNative, to confirm if
the triggered assertion is the same and to later confirm
if the fix is working for you too.</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">-Lukasz</span><o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<div>
<div
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<p class="MsoNormal"><b><span lang="EN-US"
style="mso-ligatures:none;mso-fareast-language:#0C00">From:</span></b><span
lang="EN-US"
style="mso-ligatures:none;mso-fareast-language:#0C00">
Christopher Schnick <<a
href="mailto:crschnick@xpipe.io"
moz-do-not-send="true" class="moz-txt-link-freetext">crschnick@xpipe.io</a>>
<br>
<b>Sent:</b> Saturday, 15 November 2025 17:39<br>
<b>To:</b> Lukasz Kostyra <<a
href="mailto:lukasz.kostyra@oracle.com"
moz-do-not-send="true" class="moz-txt-link-freetext">lukasz.kostyra@oracle.com</a>><br>
<b>Cc:</b> OpenJFX <<a
href="mailto:openjfx-dev@openjdk.org"
moz-do-not-send="true" class="moz-txt-link-freetext">openjfx-dev@openjdk.org</a>><br>
<b>Subject:</b> Re: [External] : Re: JavaFX Direct3D
12 - Second EA release</span><o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"> <o:p></o:p></p>
<p>Forgot to add, there is nothing out of the ordinary printed
in the verbose logs.<br>
<br>
If I find the time, I can look into compiling a debug build.<o:p></o:p></p>
<p>But the problem should be reproducible somehow when just
automatically creating a lot of labels with random styles,
sizes, and text. Some of them should break as they did for
me.<o:p></o:p></p>
<div>
<p class="MsoNormal">On 15/11/2025 17:34, Christopher
Schnick wrote:<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p>Ok, so I had more time to debug it. The one weird thing I
observed when it was working was that some labels have
corrupted text rendering:<o:p></o:p></p>
<p><img border="0" width="810" height="501"
style="width:8.4375in;height:5.2187in"
id="Picture_x0020_1"
src="cid:part2.mcIqXqxn.xIs0Cn1j@xpipe.io" class=""><o:p></o:p></p>
<p><br>
Not all of them, most are fine. There are no differences
in terms of style classes etc. between the labels. When
scrolling, the rendering sometimes switches between this
corrupted and normal state after some delay.<br>
<br>
After a while I also figured out that text rendering is
responsible for the issue of the nodes vanishing: Certain
label contents broke the renderer. For example, in my
application, the string "Password manager" when assigned
to a label broke it and nothing was rendered anymore. I
tried to find an easy reproducer but was not able to. It's
probably very dependent on all the different style classes
that influence the text shape/size/etc.<o:p></o:p></p>
<div>
<p class="MsoNormal">On 13/11/2025 16:30, Lukasz Kostyra
wrote:<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal"><span lang="PL">Thanks for checking.</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="PL"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">It is very
possible the D3D12 runtime did not like something,
could be related to your specific hardware. D3D12 by
now has many extensions which differ depending on
hardware and can lift certain restrictions - we
already internally had a case where one GPU had some
restriction that was not enforced on another GPU and
we had to accommodate that.</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">The first step
would be to try running D3D12 with
“-Dprism.verbose=true -Dprism.debug=true”. These
should print additional logs that might have some
extra information.</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">If there’s nothing
useful there, next step would be to build JavaFX with
-PCONF=DebugNative - this will compile shaders in
Debug, add assertions and debug logs to the backend -
and then run your app with D3D12 debug layers and GPU
debugging enabled by adding
“-Dprsim.d3d12.debugLayers=true
-Dprism.d3d12.gpuDebug=true”. Those will slow down the
app significantly, but will also tell D3D12 to run
additional API use and GPU use checks.</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">If the problem
happens during a render loop and debug layers catch
it, there is a chance it will cascade into other
errors and spam the console output - you can tell
D3D12 debug layers to trigger an assertion on first
encountered error with
“-Dprism.d3d12.breakOnError=true”.</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">I am running out
of time today to check this myself, but if you find
something let me know - I’ll try to reproduce the
problem myself and we’ll see where we go from there.</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">Good luck!</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">- Lukasz</span><o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<div>
<div
style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span lang="EN-US"
style="mso-ligatures:none;mso-fareast-language:#0C00">From:</span></b><span
lang="EN-US"
style="mso-ligatures:none;mso-fareast-language:#0C00"> Christopher
Schnick
<a href="mailto:crschnick@xpipe.io"
moz-do-not-send="true"><crschnick@xpipe.io></a>
<br>
<b>Sent:</b> Thursday, 13 November 2025 16:11<br>
<b>To:</b> Lukasz Kostyra <a
href="mailto:lukasz.kostyra@oracle.com"
moz-do-not-send="true"><lukasz.kostyra@oracle.com></a><br>
<b>Cc:</b> <a
href="mailto:openjfx-dev@openjdk.org"
moz-do-not-send="true"
class="moz-txt-link-freetext">openjfx-dev@openjdk.org</a><br>
<b>Subject:</b> [External] : Re: JavaFX Direct3D
12 - Second EA release</span><o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"> <o:p></o:p></p>
<p>I just tried to run a project with provided jmods and
at some point, certain nodes are just not rendered
anymore and the window contents vanish. But they render
for a short period of time.<br>
<br>
There is no exception thrown as far as I can see, so not
sure what you need for debugging.<br>
<br>
For testing, this is the built application with the
d3d12 jmods that you can use to attempt to reproduce the
problem:
<a
href="https://urldefense.com/v3/__https:/we.tl/t-DJuX0BeqXm__;!!ACWV5N9M2RV99hQ!K0ztYeDtYFyIwxlmMB-9MDuvY7Xyd60-LuJK99hex3mclCWl29MJfnxkz2mmECxINzNr5bAdKvQ64O9Xn7hHbsl_$"
moz-do-not-send="true">
https://we.tl/t-DJuX0BeqXm</a> . It is built from
these sources: <a
href="https://urldefense.com/v3/__https:/github.com/xpipe-io/kickstartfx__;!!ACWV5N9M2RV99hQ!K0ztYeDtYFyIwxlmMB-9MDuvY7Xyd60-LuJK99hex3mclCWl29MJfnxkz2mmECxINzNr5bAdKvQ64O9Xn9_QfENu$"
moz-do-not-send="true">
https://github.com/xpipe-io/kickstartfx</a><o:p></o:p></p>
<div>
<p class="MsoNormal">On 13/11/2025 14:40, Lukasz Kostyra
wrote:<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal">Hello openjfx-dev,<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">The second Early Access(EA) build
of JavaFX with the Windows Direct3D 12 rendering
pipeline is now available at:
<a
href="https://urldefense.com/v3/__https:/jdk.java.net/javafxdirect3d12/__;!!ACWV5N9M2RV99hQ!K0ztYeDtYFyIwxlmMB-9MDuvY7Xyd60-LuJK99hex3mclCWl29MJfnxkz2mmECxINzNr5bAdKvQ64O9Xnw7Bj6i8$"
moz-do-not-send="true">
https://jdk.java.net/javafxdirect3d12/</a><o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Please test this bundle and share
your feedback by:<o:p></o:p></p>
<p class="MsoNormal">- emailing <a
href="mailto:openjfx-dev@openjdk.java.net"
moz-do-not-send="true" class="moz-txt-link-freetext">openjfx-dev@openjdk.java.net</a>
or<o:p></o:p></p>
<p class="MsoNormal">- reporting issues via JBS[<a
href="https://bugs.openjdk.org/"
moz-do-not-send="true" class="moz-txt-link-freetext">https://bugs.openjdk.org/</a>]
or at
<a
href="https://urldefense.com/v3/__https:/bugreport.java.com__;!!ACWV5N9M2RV99hQ!K0ztYeDtYFyIwxlmMB-9MDuvY7Xyd60-LuJK99hex3mclCWl29MJfnxkz2mmECxINzNr5bAdKvQ64O9Xn-g1RFIV$"
moz-do-not-send="true">
https://bugreport.java.com</a><o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">This is the second EA release. The
backend is feature-complete
<span lang="EN-US">and went through a first
optimization pass</span>, but it <span lang="EN-US">
still </span>requires <span lang="EN-US">some </span>more
testing <span lang="EN-US">
on more hardware variants </span>before we can
consider it complete. As such, with this release we
also would like to call for
<span lang="EN-US">help with </span>performance <span
lang="EN-US">testing the backend
</span>(more details on that will be sent in a
separate email thread).<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Known issues and pending tasks are
captured on JBS and can be accessed using the filter
provided on the Direct3D 12 EA page [<a
href="https://urldefense.com/v3/__https:/jdk.java.net/javafxdirect3d12/__;!!ACWV5N9M2RV99hQ!K0ztYeDtYFyIwxlmMB-9MDuvY7Xyd60-LuJK99hex3mclCWl29MJfnxkz2mmECxINzNr5bAdKvQ64O9Xnw7Bj6i8$"
moz-do-not-send="true">https://jdk.java.net/javafxdirect3d12/</a>].
Before reporting a new bug, please review the existing
issues to avoid duplicates.<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Important Notes:<o:p></o:p></p>
<p class="MsoNormal">1. This is a Windows-specific
feature, so only a Windows-specific bundle is
provided.<o:p></o:p></p>
<p class="MsoNormal">2. The default rendering pipeline
is set to d3d12. Use "-Dprism.order=d3d" or
"-Dprism.order=sw" to select one of the other
pipelines for comparison testing.<o:p></o:p></p>
<p class="MsoNormal">3. It is recommended to use JDK 25
or later.<o:p></o:p></p>
<p class="MsoNormal">4. At this stage D3D12 backend is
feature-complete and went through the first phase of
optimization.
<span lang="EN-US">I</span>t is worth noting <span
lang="EN-US">that, while generally we noticed
performance improvements,</span> it might not be
<span lang="EN-US">on par with D3D backend on every
machine combo - </span>we already noted
performance being worse on recent NVidia discrete GPUs
[<a href="https://bugs.openjdk.org/browse/JDK-8370486"
moz-do-not-send="true" class="moz-txt-link-freetext">https://bugs.openjdk.org/browse/JDK-8370486</a>]
and are looking for solutions.<o:p></o:p></p>
<p class="MsoNormal">5. Issue behavior may vary across
different hardware<span lang="EN-US">, so
</span>please provide detailed information, such as
the output of "java -Dprism.verbose=true" or used
hardware, when reporting or discussing issues.<o:p></o:p></p>
<p class="MsoNormal">6. Refer: Run HelloWorld using
JavaFX SDK [<a
href="https://urldefense.com/v3/__https:/openjfx.io/openjfx-docs/*install-javafx__;Iw!!ACWV5N9M2RV99hQ!K0ztYeDtYFyIwxlmMB-9MDuvY7Xyd60-LuJK99hex3mclCWl29MJfnxkz2mmECxINzNr5bAdKvQ64O9Xn8uMZKUY$"
moz-do-not-send="true">https://openjfx.io/openjfx-docs/#install-javafx</a>]<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">We look forward to your feedback.<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Regards,<o:p></o:p></p>
<p class="MsoNormal">Lukasz<o:p></o:p></p>
<p class="MsoNormal"><span
style="mso-ligatures:none;mso-fareast-language:#0C00"> </span><o:p></o:p></p>
<p style="margin:5.0pt"><span
style="font-size:10.0pt;color:black">Confidential-
Oracle Internal</span><o:p></o:p></p>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</div>
</blockquote>
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