Resizable Window has rendering Bug

[Benkralex]

Most appropriate sub-area of Processing 4?

Core/Environment/Rendering

Processing version

1295

Operating system

Linux Mint 22.1 x86_64; Kernel: 6.8.0-54-generic

Steps to reproduce this

1. Download Source Code from https://github.com/processing/processing4/releases/tag/processing-1297-4.3.4

2. Open Project in IntelliJ and run Ant Target Linux (See Picture in Additional context for Configuration)

3. Paste Code from the Example of setResizable() into the IDE and run (See Picture in Additional context)

4. Resize the window

snippet

void setup() {
  size(200, 200);
  surface.setTitle("Hello World!");
  surface.setResizable(true);
  surface.setLocation(100, 100);
}

void draw() {
  background(204);
  line(0, 0, width, height);
  line(width, 0, 0, height); 
}

Additional context

Would you like to work on the issue?

No

[Stefterv]

Hi @Benkralex I could not reproduce this on Ubuntu, could you please test the 4.4.1 beta with the distributed binary?

[Benkralex]

I tested 4.4.1 beta with IntelliJ
Run Config:

Same issue

I also tested to install the latest/beta 4.4.1 Version of the Snap Store, again same issue

[Stefterv]

Tested on a Linux Mint VM and seeing the same thing, switching to the P2D renderer fixes it so you could use that as a temporary fix until someone on real Mint can help us debug and fix this issue.

[chris-ti-an]

tested it with Processing (latest/beta 4.4.1) on Ubuntu 24.04.2 LTS

If I repeatedly resize the window for some time very quickly (large, small, large, ...), it takes a few seconds until it crashes and looks similar to the screenshots above.

[Stefterv]

Ah thank you @chris-ti-an, I suspect that is a different issue as on Mint it was instant, what you're describing is something we've also seen on Windows before

[SableRaf]

A simple resizeable sketch can also crash if the resizing is happening too fast.

Screen.Recording.2025-04-01.at.21.31.53.mov

Snippet

void setup() {
  size(500, 500);
  windowResizable(true);
  // allow the window to be resized
}

void draw() {
  circle(width / 2, height / 2, min(width, height) * 0.5);
  // draw a circle that resizes with the window
}

void windowResized() {
  println("Window resized to: " + width + "x" + height);
  // this function is called whenever the window is resized
}