RFR: 8324941: POC for Headless platform for JavaFX [v9]

[John Hendrikx]

On Tue, 15 Jul 2025 11:32:28 GMT, Johan Vos <jvos at openjdk.org> wrote:

> > The first question is: Does this have any use case beyond testing?
> 
> Good question, and the answer is "Yes, absolutely". One of the main drivers for this was a project where PDF prints need to be generated server-side, starting from `Node.snapShot(... WritableImage)`.

@johanvos 

Did you happen to see my proposal to use the software renderer to provide a Canvas#GraphicsContext like API for writable images?  Snapshot is a nice feature, but it feels like a rather roundabout way to first use the GPU to draw things, then copy it back to main memory for pixel manipulation or say PDF creation...

See here: https://www.mail-archive.com/openjfx-dev@openjdk.org/msg20618.html

I'm curious what you think of the proposal (and I'm curious if the headless platform would need to support it or interfere with it :))

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

PR Comment: https://git.openjdk.org/jfx/pull/1836#issuecomment-3076464229