Le Tue, 07 Apr 2009 14:15:36 +0300, Martin Langhoff <martin.langh...@gmail.com> a écrit:
> Over the last few weeks there's been growing interest in using the > support for HTML5's Canvas present in Browse.xo. A very quick test > felt fairly slow, but Alex and his colleagues are interested in > studying, profiling and working towards a solution. > > So here's some notes I've collected for them -- it's not my area of > expertise anyway, so it'd be great to hear from others. > > Cairo and 565 surfaces. The XO display doesn't use 8-bits per RBG > channel (aka 888). Instead, it downsamples colours to 565 (is that > still true?). If the whole stack is using 565, then we avoid costly > downsampling, and generally hit the fast paths... > http://lists.laptop.org/pipermail/sugar/2007-April/002247.html > > Thread about X / Cairo optimisation > http://lists.laptop.org/pipermail/devel/2008-December/022042.html > > Profiling tools > http://wiki.laptop.org/go/Performance_tuning > > Something to play with - a simple Canvas and SVG benchmark > http://www.borismus.com/canvas-vs-svg-performance/ Hello Martin! This is great stuff. I am really confident some serious performance gains will be made in regards to Canvas on desktops and mobile devices/laptops/netbooks. As Peter pointed out, Mozilla is doing lots of work for Fennec, work which impact the overall performance of the Gecko platform. Since my last email I got to work on an important part of PaintWeb for GSOC 2009: keyboard shortcuts support. If you look closely into the current code of PaintWeb, there's a method named ev_keypress_prepare which is marked with a TODO label, needing lots of improvements and testing. Now I have worked on a new method to help with cross-browser compatibility for keyboard events in Web browsers. I have integrated the new code into libmacrame and I'll reuse it into PaintWeb (note that I will not use the entire lib, just this part). I have done lots of testing and now it works in Opera, Firefox, Safari, Konqueror and MSIE. You can see the code at: http://code.google.com/p/libmacrame/updates/list The KeyboardEvent.getKey() method will be part of the new code in PaintWeb, after code reorganization. Best regards, Mihai -- Mihai Sucan http://www.robodesign.ro _______________________________________________ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel