On Tue, Mar 25, 2014 at 9:41 AM, Patrick Walton <pcwal...@mozilla.com>wrote:
> On 3/24/14 1:40 PM, Robert O'Callahan wrote: > >> >>> We have multiple layers support. I reworked because it was bogus, but >>> it's >>> a hard problem with iframes in multiple threads >>> >> >> >> Would it be helpful to explain how multiprocess layer trees work in Gecko? >> > > Sure, any info is helpful. OK, so it's fairly obvious but it works well. Basically a process can construct RefLayers, which are a hole in the layer tree where another layer tree can be attached by the compositor. There is a global namespace of layer-tree IDs; when publishing a layer tree to the compositor, it's assigned an ID, and a RefLayer specifies the ID of the layer tree it should host. Before each composition, the compositor does a pass over the layer tree where it temporarily connects all the non-root layer trees as children of their RefLayers. There is no need for different processes to coordinate their layer tree update transactions in general. Rob -- Jtehsauts tshaei dS,o n" Wohfy Mdaon yhoaus eanuttehrotraiitny eovni le atrhtohu gthot sf oirng iyvoeu rs ihnesa.r"t sS?o Whhei csha iids teoa stiheer :p atroa lsyazye,d 'mYaonu,r "sGients uapr,e tfaokreg iyvoeunr, 'm aotr atnod sgaoy ,h o'mGee.t" uTph eann dt hwea lmka'n? gBoutt uIp waanndt wyeonut thoo mken.o w _______________________________________________ dev-servo mailing list dev-servo@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-servo
