P3D and P2D Fail on M4 With Tahoe 26.2

[vsquared]

Most appropriate sub-area of Processing 4?

OpenGL

Processing version

4.5.2

Operating system

macOS

Bug description

Rectangle flickers. Video of output is here:
https://www.dropbox.com/scl/fi/nx5pdjvkofi9xfd36cwb0/test.mov?rlkey=iriwzge6w1kdjok35cdqgwfxy&st=hruxsw0g&dl=0

Steps to reproduce this

1. Run the source code below on an M4 MacOS system with Processing v.4.5.2.

2. Observe output.

snippet

void setup(){
  size(600,600,P3D);
  rect(50,50,200,100);
}

Additional context

No response

Would you like to work on the issue?

No, I’m just reporting the issue

[hx2A]

I can reproduce this, also on an M4 laptop with Tahoe 26.2. The bug first appeared in Processing 4.5.0. It is not in 4.4.10.

I see the native JOGL jars are the same in 4.4.10 and 4.5.0, so that's not the source of this. They are different in 4.5.2.

I also see that I can make the problem go away by adding an empty draw() function to make it into a non-static Sketch:

void draw() {
}

This can be used as a workaround until a proper fix is found.

The default draw function is:

void draw() {
  finished = true;
}

Somehow the finished = true is tripping up the Sketch. I can't see why though.

[vsquared]

Adding an empty draw() does stop the flicker.

If I add anything to draw() it erases the rectangle that was coded in setup(). There is no rectangle with this code.

void setup(){
  size(400,450,P3D);
  rect(50,50,200,100);
}

void draw(){
  circle(150,200,40);
}

[Stefterv]

I tried to debug this a bit, setting autoSwapBufferMode to false on GLDrawableHelper from jogl makes it go stable again, so it seems something to do with the swapping buffers.

Also I tried 4.3.4 and it has the same issue

[hx2A]

@Stefterv I'm happy to help investigate and debug this.