Commits on Apr 8, 2020

1. Bug 1627864 - Fix invalidation of tiles when the shape of the spatial… …

   … node tree changes. r=nical,Bert,kvark
   
   Previously, primitive dependency checking would invalidate a tile if
   the spatial node index for a given primitive changed.
   
   However, if a new display list is sent that changes the shape of
   the spatial node tree this may cause unnecessary invalidations.
   
   For example, a new display list that inserts a new spatial node at
   the start of the tree could result in spatial node indices being
   different, even though the values of the transforms was the same.
   
   This patch changes the invalidation logic for spatial nodes to
   compare the transforms by value, rather than index, meaning that
   invalidations are avoided if the shape of the spatial tree has
   changed, but the values are consistent.
   
   Differential Revision: https://phabricator.services.mozilla.com/D69913
   
   [ghsync] From https://hg.mozilla.org/mozilla-central/rev/498d2204d63739057b626da3239d130c412099e0

   

   gw3583 authored and moz-gfx committed Apr 8, 2020
   0d8ed82

2. Bug 1627816 - Fix skipping composites when tile surface changes. r=nical …

   This fixes a case where the backing surface of a picture cache tile
   changes, but was still being considered a no-op frame, which skips
   the composite as an optimization if nothing has changed.
   
   In this case, the tile surface changes from a rasterized texture
   to a solid color that doesn't require a picture cache texture.
   
   The patch ensures that the composite surface descriptors that are
   used to detect no-op frame compositions include the backing
   surface for each of the tiles that make up this virtual surface.
   
   Differential Revision: https://phabricator.services.mozilla.com/D70138
   
   [ghsync] From https://hg.mozilla.org/mozilla-central/rev/5b784c47235ccd535d694c1ec2caf5b341570ff1

   

   gw3583 authored and moz-gfx committed Apr 8, 2020

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