Posted by ac on Feb 18, 2012; 11:51pm
URL: https://forum.jogamp.org/Some-issues-using-NEWT-tp3757230.html

Hello guys,

I'm currently replacing the use of AWT's GLCanvas/GLDrawable in Processing with NEWT's window and canvas. Results are quite promising so far, as I managed to get the rendering loop running within its own independent thread, fullscreen support working on Linux, etc.

However, I also encountered some issues, affecting particularly MacOSX. Since Processing's renderer is fairly large, I created a small self-contained demo application that reproduces the issues I see in Processing, and also mirrors the basic structure of the Processing renderer.

The code of the application is here: http://pastebin.com/H4pb3kik

It is organized as an Applet contained inside a Frame, and uses a custom animator to render frames on demand. The GLWindow and NewtCanvasAWT canvas are created in a setup method that allows to hook the canvas either to the root frame or the applet object. I'm testing these two alternatives because each one has different issues and I haven't managed yet to get an initialization procedure that works 100%. So the issues are the following (on MacOSX Snow Leopard and Lion, behavior on Windows and Linux is slightly different but let's focus on Mac for the time being):

1) Hooking the canvas to the frame:
frame.add(canvas, frame.getComponentCount() - 1);

* window looses decorations on OSX
* is not logically consistent: frame contains both applet and canvas as child components, but it should be frame -> applet -> canvas, shouldn't it?

2) Hooking the canvas to the applet:
applet.add(canvas, this.getComponentCount() - 1);

* target framerate (120 in the posted code) is not honored
* gives invalid drawable error one time at the beginning

I'm running all my tests with a recent autobuild package of jogl (post rc5). I'm also testing event handling, and have some questions about it as well, but will leave them for later.

So my basic question at this point is: what would be the correct setup procedure for NEWT that works within this framework (Frame->Applet)? Since Processing's Applet class is basically a heavyweight AWT component, I'm wondering if issue-free integration of NEWT is possible at all. Maybe we need to stick with AWT's GLCanvas? Please let me know your thoughts, comments, etc.

Any help will be greatly appreciated!