On Mon, Mar 28, 2016 at 3:06 PM, Patrick Walton <pwal...@mozilla.com> wrote:
> Keep in mind that Servo without WR doesn't do dirty rects and invalidation > either. (I had patches to do it but they weren't complete and bitrotted.) > Ok, so that helps to explain Manish's results above. > The question in my mind is whether it'd be better to build the CPU fallback > on top of WebRender or whether it's best to build it on top of Skia. There > are ways to build invalidation on top of WebRender, so I'm not sure we gain > much by keeping the old painting code around. Furthermore, WebRender 2 has > the potential to make invalidation and dirty rects easy. It's not clear > whether WR2 will work, but signs are positive enough that there's a good > chance that any invalidation work we did today would be obsoleted by the > WR2 effort. The upshot to me is that it's likely that maintaining the > existing painting code will not prove helpful for invalidation work anyhow. > This makes sense to me. > > Patrick > On Mar 28, 2016 1:50 PM, "Bobby Holley" <bobbyhol...@gmail.com> wrote: > > > In general, does the software-fallback path for WebRender mean "really > > really slow"? If WebRender avoids dirty-rects on the grounds that > painting > > is free, then a GL-based software path is going to be a lot slower than a > > classic software rendering path. > > > > On Mon, Mar 28, 2016 at 10:33 AM, <lbergst...@mozilla.com> wrote: > > > > > On Monday, March 21, 2016 at 11:45:06 AM UTC-5, Jack Moffitt wrote: > > > > I propose the following straw man transition plan: > > > > > > > > 1. Keep -c, -g, -w command line options as they are, but switch the > > > > default setting to WebRender. > > > > 2. Remove -g. > > > > 3. Add in an llvmpipe software-only fallback and replace -c with > that. > > > > > > I like this plan, or at least the first two steps of it. Does #1 > require > > > getting any additional WPT/CSS tests working, or is WebRender basically > > > already there? > > > > > > I think #3 might need some more thought to figure out what scenarios it > > > will support (printing? X11 remoting? headless mode?) to see if > llvmpipe > > > will support all of those scenarios. But it'd be great if it did and > > would > > > let us reduce the number of rendering backends. > > > - Lars > > > _______________________________________________ > > > dev-servo mailing list > > > dev-servo@lists.mozilla.org > > > https://lists.mozilla.org/listinfo/dev-servo > > > > > _______________________________________________ > > dev-servo mailing list > > dev-servo@lists.mozilla.org > > https://lists.mozilla.org/listinfo/dev-servo > > > _______________________________________________ > dev-servo mailing list > dev-servo@lists.mozilla.org > https://lists.mozilla.org/listinfo/dev-servo > _______________________________________________ dev-servo mailing list dev-servo@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-servo
