For those who are not aware, juce plugin graphics on windows hosts may become blank and unresponsive. When one plugin becomes blank, all other juce instances are also (even from different vendors). In my case, the host is sawstudio. I was thinking it would be handy if an external program could instruct all loaded juce instances to repaint.
I wrote an autohotkey (although an exe or powershell would be better) to dllcall windows’ RedrawWindow function to the plugins, but now have found juce does not use that mechanism to repaint. Obviously this should be remedied within juce (which I’m not familiar with), but until then, being able to make the displays operational without having the disruption of shutting down and restarting my DAW would be an acceptable workaround.
Is there a utility that does this, or how would one go about doing it?
This issue is restricted to plugins built in JUCE - in my case TokyoDawn and Apulsoft. I use several other plugins (waves, fabfilter, etc…) that do not have this issue, and continue to display just fine when JUCE windows remain blank. I should mention these are all vst2. Also there are descriptions of similar issues on this forum on several different hosts.
Another symptom (or maybe suspicion) that I have seen is when a juce plugin is initially opened, its interface renders fine. Opening a second juce plugin, or instance (of the same one), greatly increases the likelihood of display failure.
One more thing, my objective in writing a utility (in addition to restoring my windows) is to help troubleshoot the problem. If I had found a way to restore functionality to the plugin displays or related to non-juce plugins, I would report it to sawstudio’s developer. AutoHotkey has a handy utility called windowspy, this reports the dll associated with a particular display window - since all of the failing displays are for juce plugins, I report it here.
