Hi Andrea! This is about rendering cairo shadowed text to a temporary image surface that we talked about a few months ago. cairo's M Joonas Pihlaja still wants a screenshot of the test you did in this post: https://bugs.launchpad.net/libcairo/+bug/655024/comments/45
I'm hardly a GUI expert, so my e-mail to you in November may be meaningless: --- begin excerpt --- You can hold off on that screenshot if you want. But I'd rather you didn't. I've determined that gtk+ or compiz or the darn app is calling for redisplay at least once every 0.3 seconds. Totally unnecessary, I'd say, but who am I to judge? Granted, it's only 3 torrents and their cells per second, out of 35. But it should be 0. If they're paused and non-dynamic. If there is no alternative, I will talk to canonical about linking an earlier cairo to transmission-gtk. Your theme should be fine. As it already is --- end --- I retrofitted libcairo 1.8 onto my system and that did not fix the problem -- CPU usage went up more than 400% displaying paused torrents in transmission-gtk. As you may recall, these are rendered with the gtk property "sensitive" = FALSE, which murrine draws shadowed. So going to an earlier libcairo didn't help. This dramatic slowdown only seems to have started with October's ubuntu Maverick, despite the fact that I believe your theme has been the default since April's Lucid. In https://bugs.launchpad.net/libcairo/+bug/655024/comments/55 one of the gui developers of transmission-gtk expressed interest in getting his app working nicely in the next ubuntu release. I posted a silly mini-patch in comment 57 which turns off the slow non-sensitive rendering, but since I am not a GUI developer, I just put in an xpad offset for paused elements instead of non-sensitive, and this makes them "shimmer" when you mouse over them. It's not a fix, but it eliminates the slowdown as a "proof of concept." Is there a way you can make an exception in your theme for "transmission-gtk" to render non-sensitive elements bold and lighter? That would look similar to the shadowed rendering I see now, and I hope it would be faster. As I said, there is always a chance the transmission-gtk guy will look at some other way than non-sensitive to render paused elements, but please let me know how you feel about all this. Thanks for your work! - veldt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/655024 Title: Using higher cpu usage -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
