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  Java2D Native Fullscreen and VSync  (Read 2428 times)
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Offline ghostsoldier23

Junior Member


Medals: 1



« Posted 2013-03-20 23:43:04 »

I've recently come across an interesting phenomenon on Windows while creating a display class for 2D rendering.

If you use the following code to set a JFrame as the fullscreen window natively:

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         GraphicsDevice d = GraphicsEnvironment
               .getLocalGraphicsEnvironment().getDefaultScreenDevice();
         if (d.isFullScreenSupported()) {
            d.setFullScreenWindow(frame);


at least on my system, it causes the graphics driver to engage VSync on Java's rendering.  I know this because when I removed the FPS cap to check overall performance, it never went over 60 until I disabled the above code and tried a screen sized JFrame instead.

It looks damn good too.  Not a single jitter or break in the animations.  100% smooth rendering.

A few things to consider:
I am using the Direct3D Java properties:
sun.java2d.d3d=true
sun.java2d.noddraw=false
sun.java2d.accthreshold=0
and the infinite sleeping thread (hi-res timer) hack.

My graphics driver is in fact set to always enforce VSync (that's how I've gotten the best performance in games) on 3D applications, so I wouldn't necessarily expect this to work on PCs that don't have that setting.

Some system specs:
OS: Windows 7
CPU: i7-3770
GPU: NVidia GeForce GTX-560 GC (factory overclocked) 2GB VRAM
RAM: 16GB

Forgive me if this is some kind of old-as-the-hills common knowledge.  I thought it was pretty interesting.  Has anyone else ever noticed this and/or can you confirm it on your system?
Offline gouessej
« Reply #1 - Posted 2013-03-23 01:13:48 »

Disable the Direct3D pipeline and it should work.

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