Display detection fails in Processing 4.5.6 on macOS + pixelDensity()

[SableRaf]

Most appropriate sub-area of Processing 4?

Core/Environment/Rendering

Processing version

4.5.6

Operating system

macOS Tahoe 26.5.2 (25F84)

Bug description

Running an empty sketch in Processing 4.5.6 produces the following warnings:

display count needs to be implemented for non-AWT
AWT disabled, displayWidth/displayHeight will be 0

Additionally, calling pixelDensity(2) produces this error:

pixelDensity(2) is not available for this display

Processing should detect the display dimensions and use pixelDensity(2) by default on the built-in Retina display.

Regression for:

• Add warning for default pixelDensity behavior #1226
• Change the default display density #1038

Steps to reproduce this

1. Install Processing 4.5.6 on macOS.
2. Open Processing and create a new sketch.
3. Run the sketch below.
4. Observe the display-count and displayWidth/displayHeight warnings in the console.
5. Uncomment pixelDensity(2).
6. Run the sketch again.
7. Observe the pixelDensity(2) is not available for this display error.

snippet

void setup(){
  size(640,400);
  //pixelDensity(2);
}

void draw(){
  line(10,10,630,390);
}

Additional context

Would you like to work on the issue?

No, I’m just reporting the issue