macOS: Render OpenGL frames on ThreadPoolJob instead of directly on the CVDisplayLink thread to avoid a deadlock

Author: ed95

modules/juce_opengl/opengl/juce_OpenGLContext.cpp

@@ -466,7 +466,10 @@ class OpenGLContext::CachedImage  : public CachedComponentImage,
 
            #if JUCE_MAC
             if (cvDisplayLinkWrapper != nullptr)
-                repaintEvent.wait (1000);
+            {
+                repaintEvent.wait (-1);
+                renderFrame();
+            }
             else
            #endif
             if (! renderFrame())
@@ -683,7 +686,7 @@ class OpenGLContext::CachedImage  : public CachedComponentImage,
                                              CVOptionFlags, CVOptionFlags*, void* displayLinkContext)
         {
             auto* self = (CachedImage*) displayLinkContext;
-            self->renderFrame();
+            self->repaintEvent.signal();
             return kCVReturnSuccess;
         }