Hey.. my application used to use the glasspane for animations, following this simple scheme
- draw initial component state to an image - draw final component state to an image - set my own component as glasspane - the draw the different animation stages in the glasspane component, calling repaint() on the glasspane component with a swing timer - when the animation is done, re-install the original glasspane The animation is supposed to last 300ms with 20ms increments. On current laptop hardware running OS X 10.9.2 and JDK 8, I get exactly *no* animation frames. At the same time this works fine on Windows, even running in a Parallels VM on the very same hardware. Some testing reveals that it's the glasspane's fault. The same animation works (more or less) smoothly, when using a layered pane. Now, I don't have to use the glasspane (and perhaps I shouldn't), the layered pane works just fine for me. So my initial problem is solved. But, if I had to use the glasspane, I'd be in trouble. With the current performance, it's fairly unusable. Looking at the code in JRootPane#setGlassPane(Component), the only thing that sticks out is: AWTAccessor.getComponentAccessor().setMixingCutoutShape(glass,new Rectangle()); Anyhow. I couldn't find a corresponding bug, so I figured I bring this to your attention. Perhaps this is something you want to investigate further. Cheers, -hendrik
