Freeze of GAMA when vertically resizing the main window (with at least one openGL display)

[benoitgaudou]

Describe the bug GAMA freezes when resizing the main window (displaying 2 OPENGL displays) (seems linked to a resize of one display).

To Reproduce Steps to reproduce the behavior:

1. Run the model Building HeatMap.gaml > experiment Show heatmap.
2. Resize the main window

Screenshots

Desktop (please complete the following information):

• OS: macOS Big Sure
• GAMA version: git

[agrignard]

I don't have it on Mac Catalina 10.15.7

[AlexisDrogoul]

Cant reproduce it either... Would it be linked to specific preferences ? Can you show your display preferences ?

• EDIT: Sorry. I read it too fast. I can reproduce it, as well, when resizing the main window. Not when resizing individual views. And it doesn't affect Java2D, only OpenGL.
• EDIT2: One display is enough to trigger the bug. It is not linked with the new sync strategy of display views and neither with the new animator (happens also when reverting to the old ones).
• EDIT3: Mesh layers are not involved (it happens w/o them), and neither are any of the GAMA + JOGL processes, as the simulation continues to run although the UI is frozen and the beachball cursor turns).
• EDIT4: A profiling with YourKit reveals nothing - none of the Java processes seem to be stopped. So there seems to be some low-level interaction between JOGL views and native threads that creates this mess.
• EDIT5: All the 7 versions of JOGL 2.4.0 are affected (from January 2020 to January 2021) -- and coming back to 2.3.2 is not an option anymore as it doesn't work on new macOS versions.
• EDIT6: Only the vertical resizing creates a problem. Horizontal resizing and fullscreen do not create any problems.

[AlexisDrogoul]

As I wrote in #3199, the really worrying fact about all this is here: https://jogamp.org/cgit/jogl.git/log/ (more than one year without any commit...)

[RoiArthurB]

Not sure if it's related, but the experiment Library Models > Vizu and User Interaction > Visualisation > Charts > models > Ant Foraging (Charts Examples).gaml makes GAMA crash when the layout try to split. It may be a margin behavior of the OpenGL window being resized over some Java2D windows...

Here's the crash log

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EDIT : The log says GAMA 1.8.1, but it's the 1.8.2 freshly built (not within Eclipse, not Github released, locally built with maven) on MacOS 11 :)

[AlexisDrogoul]

I have implemented a workaround that forces the main window to resize its views asynchronously (i.e. accumulate the resize events and deliver them all at once when the mouse is released). It is enabled by default on macOS, but can activated on other environments (with slow graphics, for instance) using the -Duse_delayed_resize=true flag, documented in ummisco.gama.dev.utils.FLAGS.java (and that we should document somewhere with the other flags).