P2D and P3D sketch windows flash red during resize

[processing-bot]

Created by: benfry

At least on macOS, resizing the window of an OpenGL sketch will cause it to intermittently flicker red.

Tracked this down to the display.getEDTUtil().isCurrentThreadEDT() check inside PSurfaceJOGL.DrawListener.display(). For now (4.0 beta 5), added a hack to allow the FBO to update.

But there are bigger issues here, which are now being tracked here: #385

[processing-bot]

Created by: github-actions[bot]

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