Hi, I would like to second you on this point as I've also noticed some lags while scrolling windows on MacOSX (with the latest XQuartz)
Best regards, Nicolas Le ven. 1 avr. 2016 04:03, John D. Duncan, III <duncanjd...@gmail.com> a écrit : > Hello all. I was wondering if there is any word on the status of getting > the COMPOSITE extension built into XQuartz? I personally use a bunch of > UNIX-y GUI programs and dockapps (some of them quite old). I've found > that, when doing graphically intensive actions (such as quickly > scrolling in a unicode-rxvt term, forwarding my SSH session to XQuartz > to write LaTeX/use eclipse from our campus workstation computers/submit > moodle assignments in firefox), that there is quite a good deal of > graphical sluggishness. CPU use does not spike much, so I am assuming > that this is a flaw of the X server rendering itself (or perhaps the OS > X drivers?). > > I have somewhat superficial knowledge of the COMPOSITE extension, but I > was under the impression that X11 compositors (such as compton) get > around this issue by using open-gl/randr rendering as their graphical > back-end (among many other hacks). > > It seems that programs which do use open-gl rendering are unaffected by > the sluggishness caused by my dockapss (glxgears, for example). > > I was also under the impression that most modern UNIX-y Desktop > Environments (such as Gnome, KDE, etc.) come with compositors built in > (for eye-candy such as v-synch, drop shadows, smooth scrolling, etc.). > > It seems like adding COMPOSITE extension support could potentially bring > over users from other operating systems (especially with the wonderful > pkg-src development from Jonathan Perkin at joyent) that could further > help re-vitalize the OS X open-source community. > > I know that, normally, to enable the composite extension in X11 you > would just add: > > Section "Extensions" > Option "Composite" "Enable" > EndSection > > to your xorg.conf file. As we know, XQuartz uses a different system > where all of the X server extensions are always started on launch > (xrandr, etc.) > > Am I missing something, or is XQuartz still being built without the > COMPOSITE extension enabled? I remember reading archives from the past > that explained how builds would fail while trying to compile with > COMPOSITE support [1]. That was years ago, and I thought there was a > modern XQuartz branch that supported the extension..[0] > > Here are some (bad examples) of the issue that I am talking about: > http://cs.gettysburg.edu/~duncjo01/XQuartz.webm > http://cs.gettysburg.edu/~duncjo01/XQuartz-glx.webm > > Notice how, especially in the second screencast, extreme scrolling in > the urxvt buffer causes the dockapps to hang, while the glxgears program > chugs along at a smooth 60fps. I was hoping that enabling the COMPOSITE > extension and using a compositor such as compton could alleviate such > issues in the future. > > Let me apologize in advanced if I have interpreted this issue completely > incorrectly; I am no X11 expert. > > [0]: > https://lists.macosforge.org/pipermail/xquartz-changes/2011-May/001054.html > > [1]: http://lists.apple.com/archives/x11-users/2011/Feb/msg00013.html > > - John D. > > _______________________________________________ > Xquartz-dev mailing list > Xquartz-dev@lists.macosforge.org > https://lists.macosforge.org/mailman/listinfo/xquartz-dev >
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