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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Iosevka Fixed SS16"">Excellent development, Johan, thank you!<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Iosevka Fixed SS16""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Iosevka Fixed SS16"">I’ve asked a few questions in the ticket
<a href="https://bugs.openjdk.org/browse/JDK-8324941">https://bugs.openjdk.org/browse/JDK-8324941</a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Iosevka Fixed SS16""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Iosevka Fixed SS16"">I suppose I should also do it here:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Iosevka Fixed SS16""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Iosevka Fixed SS16"">- How do you get information on a (virtual) screen?<br>
- How would one control how many virtual screens are there?<br>
- Would there be any other way of simulating user input apart from Robot?<br>
- Is the graphics still accelerated?<br>
- Are there any functional gaps between Headless and headful modes (fonts, rendering, etc.)?<br>
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Most importantly,<br>
- Is there a JEP/tutorial for the new mode?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Iosevka Fixed SS16""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Iosevka Fixed SS16"">Thank you<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Iosevka Fixed SS16"">-andy<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Iosevka Fixed SS16""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Iosevka Fixed SS16""><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="font-size:12.0pt;font-family:"Aptos",sans-serif;color:black">From:
</span></b><span style="font-size:12.0pt;font-family:"Aptos",sans-serif;color:black">openjfx-dev <openjfx-dev-retn@openjdk.org> on behalf of Johan Vos <johan.vos@gluonhq.com><br>
<b>Date: </b>Tuesday, January 30, 2024 at 03:47<br>
<b>To: </b>openjfx-dev <openjfx-dev@openjdk.org><br>
<b>Subject: </b>Headless glass platform<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt">Hi,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt">I created a branch in the jfx-sandbox repository for experimenting with a headless glass platform:
<a href="https://github.com/openjdk/jfx-sandbox/tree/johanvos-headless">https://github.com/openjdk/jfx-sandbox/tree/johanvos-headless</a><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt">This addresses <a href="https://bugs.openjdk.org/browse/JDK-8324941">https://bugs.openjdk.org/browse/JDK-8324941</a> where I suggest a POC for a Headless platform.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt">There are a number of usecases for this, including:<br>
1. applications that require JavaFX rendering without presenting this to a window (and instead send it to a printer for example)<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt">2. running tests without requiring a window manager.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt">Regarding the second usecase, we already did some basic experiments using a modified version of TestFX where instead of the Monocle Headless subplatform, the POC Headless platform is used.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt">By using a first-class Headless glass platform instead of a Monocle subplatform, it should be easier to use by developers.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt">The monocle code contains very platform/os specific parts, which often don't make sense outside the target platform. This is very valuable, but it is also a very different usecase than a headless platform
and it requires a much more complex build procedure.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt">I added an initial, limited HeadlessRobot to do some basic tests. That code is mainly taken from the existing Monocle implementation, but I want to be careful to avoid anything that is not applicable to the
headless scenarios.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt">- Johan<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
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