processing/processing4

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Source code for Processing, the software sketchbook and Java-based programming language for students, artists, designers, educators, hobbyists, and creative coders. Includes the core library, and editor (PDE)

Stars: 497
Forks: 183
Open beginner issues: 1
Indexed issues: 254
Avg merge: 4h 39m
Merged PRs (30d): 3

Dominant language: Java
License: No license data
Last GitHub push: Sep 18, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: help wanted good first issue

Beginner friendly Everything

Open All

254 open issues indexed

startup error Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

processing/processing4#1569 · 7 comments · Opened Sep 14, 2026
Binaries under bin directory lack executable permissions for the snap and .deb packages for Linux Open

bug

processing/processing4#1567 · 3 comments · 1 reaction · 1 assignee · Opened Aug 23, 2026
rounded rectangle performance in P2D / P3D is extremely poor when stroke is used Open

lower priority

Difficulty 4/5 3-5 days Newbie friendliness 55/100

processing/processing4#1566 · 3 comments · Opened Aug 23, 2026
other cursors for P2D / P3D Open

Difficulty 3/5 1-2 days Newbie friendliness 52/100

processing/processing4#1565 · Opened Aug 20, 2026
Fail open application from remote desktop: LoadLibrary failed with error 87: incorrect param Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

processing/processing4#1564 · Opened Aug 7, 2026
Unable to run JavaFX in Processing 4.5.6 MacOS Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

processing/processing4#1561 · 2 comments · Opened Aug 5, 2026
Fixing the "Cannot access sketchbook" error requires resetting "org.processing.four," but that does not exist. Open

bug

Difficulty 2/5 1-3 hours Newbie friendliness 64/100

processing/processing4#1554 · 1 comment · Opened Jul 25, 2026
webgpu window not showing up on linux Open

bug webgpu

processing/processing4#1541 · 1 assignee · Opened Jul 8, 2026
Set up testing infrastructure for webGPU work Open

build system webgpu

processing/processing4#1539 · 2 comments · 1 assignee · Opened Jul 8, 2026
OpenGL/3D sketches crash with `UnsatisfiedLinkError` on Linux when the bundled sketch JDK cannot fork+exec Open

bug

processing/processing4#1537 · 1 comment · 1 assignee · Opened Jul 6, 2026
PVector angleBetween returns 0 when x and y of either parameter are both 0 Open

Difficulty 3/5 1-2 days Newbie friendliness 56/100

processing/processing4#1544 · Opened Jul 1, 2026
Multiple external monitors displayed incorrectly in Preferences > Sketches Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 55/100

processing/processing4#1530 · 3 comments · Opened Jun 23, 2026
File association problem Open

bug

processing/processing4#1529 · 1 assignee · Opened Jun 19, 2026
Missing App Drawer Icon (Flatpak) Open

bug

processing/processing4#1527 · 8 comments · 1 assignee · Opened Jun 16, 2026
Save dialog unusable Open

bug

processing/processing4#1526 · 6 comments · 1 assignee · Opened Jun 13, 2026
full screen bug with few device Open

bug

processing/processing4#1524 · 1 comment · 1 reaction · 1 assignee · Opened Jun 9, 2026
RFC: future PDE implementation as a VSCode fork Open

enhancement pde question

Difficulty 5/5 Over a week Newbie friendliness 25/100

processing/processing4#1522 · 5 comments · 5 reactions · Opened Jun 2, 2026
`fullScreen(P2D, SPAN)` does not span across multiple displays on macOS Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 48/100

processing/processing4#1518 · Opened May 20, 2026
Error "Could not get the settings folder" when opening a sketch with double click Open

bug

processing/processing4#1517 · 2 comments · 1 assignee · Opened May 13, 2026
determining path for portable preferences file is wrong for windows OS Open

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

processing/processing4#1515 · 1 reaction · Opened May 6, 2026
verify code signature for mac release action before sending for notarization Open

enhancement

processing/processing4#1504 · 1 comment · 1 reaction · 1 assignee · Opened Apr 17, 2026
P3D crash on ARM64 Snapdragon Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 45/100

processing/processing4#1502 · 4 comments · Opened Apr 13, 2026
Could not run the sketch. ERROR: transport error 202: bind failed: Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

processing/processing4#1500 · 1 comment · Opened Apr 8, 2026
Stroke is shaking when rotates Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

processing/processing4#1481 · 3 comments · Opened Mar 16, 2026
Add unit tests for JSONArray Open

enhancement

processing/processing4#1470 · 5 comments · 1 assignee · Opened Mar 4, 2026
Add visual regression tests to visual-testing branch Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

processing/processing4#1465 · 4 comments · Opened Mar 3, 2026
Android SDK path is not saved in preferences. Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 42/100

processing/processing4#1457 · 3 comments · Opened Mar 2, 2026
Closing a sketch closes the Welcome window as well. Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 55/100

processing/processing4#1456 · 3 comments · Opened Mar 2, 2026
Export path leaks streams in java/src/processing/mode/java/JavaBuild.java and can hang on malformed jar entries Open

processing/processing4#1451 · 2 comments · 1 assignee · Opened Feb 27, 2026
Python mode not working for windows Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 45/100

processing/processing4#1450 · 6 comments · 1 reaction · Opened Feb 26, 2026
Opening Print Dialog Freezes Processing on Windows 11 Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

processing/processing4#1449 · 2 comments · Opened Feb 25, 2026
PShape.contains() is broken for transformed shapes (double invert) Open

paused

Difficulty 1/5 Under an hour Newbie friendliness 55/100

processing/processing4#1445 · 4 comments · Opened Feb 21, 2026
Not Installing Lib Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 18/100

processing/processing4#1433 · 4 comments · Opened Feb 14, 2026
Improve startup performance Open

paused

Difficulty 5/5 Over a week Newbie friendliness 25/100

processing/processing4#1429 · 1 reaction · Opened Feb 10, 2026
Building processing throws `UnsupportedClassVersionError` in `:core:examples:Basic.main()` Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

processing/processing4#1428 · 4 comments · Opened Feb 10, 2026
P2D / P3D doesn't work on a M1 Mac Studio Open

bug

processing/processing4#1426 · 15 comments · 1 assignee · Opened Feb 9, 2026
Add an `install.sh` for easy install Open

processing/processing4#1425 · 14 comments · 2 reactions · 1 assignee · Opened Feb 9, 2026
P3D and P2D Fail on M4 With Tahoe 26.2 Open

bug

processing/processing4#1422 · 7 comments · 1 assignee · Opened Feb 8, 2026
Missing hashCode on Sketch Open

Reserved: EC

processing/processing4#1414 · 4 comments · 1 assignee · Opened Feb 5, 2026
`processing/java/gradle` Rework libraries import Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

processing/processing4#1412 · 3 comments · Opened Feb 5, 2026
Every time I try to switch from Java Mode to Android Mode Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 50/100

processing/processing4#1410 · 2 comments · 1 reaction · Opened Feb 5, 2026
Processing 4.5.2 does not run on Pop!_OS 24.04 LTS Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

processing/processing4#1406 · Opened Feb 3, 2026
list of revisions Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

processing/processing4#1399 · 2 comments · Opened Jan 30, 2026
Debugging P2D is way harder then JAVA2D Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

processing/processing4#1397 · 4 comments · Opened Jan 30, 2026
Stop modal message from freezing all windows Open

enhancement

processing/processing4#1375 · 3 comments · 1 assignee · Opened Jan 3, 2026
request to remove org.jetbrains.annotations.NotNull as a processing dependency Open

Difficulty 2/5 1-3 hours Newbie friendliness 55/100

processing/processing4#1372 · Opened Dec 30, 2025
Error message `Syntax Error - editor.status.error_on` Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 35/100

processing/processing4#1370 · 1 comment · Opened Dec 29, 2025
processing cli --help links to old repository Open

bug

processing/processing4#1366 · 9 comments · 1 reaction · 1 assignee · Opened Dec 19, 2025
Feature request: Friendly Error System for Processing Open

paused

Difficulty 5/5 Over a week Newbie friendliness 30/100

processing/processing4#1365 · 2 comments · Opened Dec 19, 2025
"Run sketch on display" fails to place window on secondary display on macOS when the sketch window would have to cross the task bar Open

bug help wanted

Difficulty 4/5 3-5 days Newbie friendliness 45/100

processing/processing4#1361 · 1 comment · Opened Dec 17, 2025

processing/processing4

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