On Tue, 16 Nov 2021 07:53:46 GMT, Sergey Bylokhov <s...@openjdk.org> wrote:
> > Please correct my understanding. Does this refined repaint logic apply even > > for overlapping Windows? What happens when 2 windows are overlapping and we > > move top window slowly? Any performance/power impact? > > Initially, this code was used just for that, to make a fast blit of the > content from the Swing back buffer to the native window, when some other > window is moved over the Swing and damaged it (the fix for the "grey > rectangle" JDK-4967886). But since Windows Vista the Windows itself maintain > such doublebuffer and the content is not damaged when windows overlap, so > this callback is not called. Thanks for the clarification ------------- PR: https://git.openjdk.java.net/jdk/pull/6339
