Commits on Nov 27, 2018

1. Allow picture caching to work across scenes (display lists). …

   This patch hooks up the primitive interning work with the tile
   caching work.
   
   Since we have a uid that guarantees uniqueness of the content of
   primitives and clip nodes, we can use that to construct a
   (reasonably) efficient hash key for the content of a tile.
   
   Along with some additional information (such as the state of the
   transforms used by the tile), we can construct a hash key for
   the content of a tile that is stable across new display lists,
   even if the shape of the clip-scroll tree changes in ways that
   don't affect the tile.
   
   This patch takes advantage of that to retain tiles when a new
   scene is built, where the content of a tile would result in
   the same output.

   

   gw3583 committed Nov 27, 2018
   89ab2e3

2. Address review comments

   

   gw3583 committed Nov 27, 2018

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