Description

SableRaf

opened on Jul 20, 2026

Issue body actions

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

Activity

1. SableRaf

   assigned

   catilac

   on Jul 20, 2026
2. SableRaf

   added

   bugSomething isn't workingSomething isn't working

   on Jul 20, 2026
3. SableRaf commented on Aug 31, 2026

   

   SableRaf

   on Aug 31, 2026

   CollaboratorAuthor

   More actions

   Note: a related discussion is happening here on the forum: https://discourse.processing.org/t/display-count-needs-to-be-implemented-for-non-awt/49232
4. AlexRussellArtist commented on Aug 31, 2026

   

   AlexRussellArtist

   on Aug 31, 2026

   More actions

   The discussion @SableRaf mentions relates to the same
   "display count needs to be implemented for non-AWT AWT disabled, displayWidth/displayHeight will be 0"
   error message, but on Windows 11. Running his snippet does not throw the
   "pixelDensity(2) is not available for this display"
   on (my) PC.
5. SableRaf commented on Sep 11, 2026

   

   SableRaf

   on Sep 11, 2026

   CollaboratorAuthor

   More actions

   cc @manoellribeiro
6. manoellribeiro commented on Sep 11, 2026

   

   manoellribeiro

   on Sep 11, 2026

   More actions

   thanks @SableRaf , reading about it
7. SableRaf

   assigned

   manoellribeiro

   and unassigned

   catilac

   on Sep 12, 2026
8. SableRaf commented on Sep 12, 2026

   

   SableRaf

   on Sep 12, 2026

   CollaboratorAuthor

   More actions

   Sure thing @manoellribeiro! I re-assigned it to you. Thanks for looking into it.
9. tychedelia

   added a commit that references this issue on Sep 14, 2026

   Fix: only pass --disable-awt for WebGPU renderer

   76feca7
10. catilac commented on Sep 18, 2026

    

    catilac

    on Sep 18, 2026

    Collaborator

    More actions

    this is fixed in 4.5.7!

    Reacted by Leo

    Reacted by Ülgen Sarıkavak and Manoel Ribeiro
11. catilac

    closed this as completedon Sep 18, 2026

Issue actions