Commits on Feb 4, 2020

1. Bug 1601865 - Fix scrollbar cache slices having extra primitives. r=n… …

   …ical
   
   There's two potential cases handled by this patch:
   
   (1) A scrollbar container followed by another scrollbar container.
       In this case, we need to ensure these are placed into separate
       clusters, even though the cluster flags otherwise match, to
       ensure that slice creation will see the two clusters.
   
   (2) If a fixed position scroll root trails a scrollbar container.
       In this case, ensure that a scrollbar contains marks the
       cluster flags to create a slice straight after the scrollbar,
       to avoid other primitives with the same scroll root sneaking
       into the scrollbar container.
   
   Differential Revision: https://phabricator.services.mozilla.com/D61519
   
   [ghsync] From https://hg.mozilla.org/mozilla-central/rev/e1a4153cfb39a6e1706e88f036d6874bd0ddc39c

   

   gw3583 authored and moz-gfx committed Feb 4, 2020

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2. Bug 1612973 - allow opaque images to use the fast image shader. r=nical …

   Differential Revision: https://phabricator.services.mozilla.com/D61508
   
   [ghsync] From https://hg.mozilla.org/mozilla-central/rev/6deaa5a356b2106c4393357b365280ca54ca7d22

   

   Lee Salzman authored and moz-gfx committed Feb 4, 2020

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