Commits on Jan 18, 2018

1. Fix an issue with clip masks and segmentation …

   When all clips are optimized away,  we may still need a clip mask when
   some of those clips were in a different coordinate system. This change
   ensures that this information is used to properly apply global clip
   masks for segmented primitives with this kind of clipping situation.
   
   Fixes #2294.

   

   mrobinson committed Jan 18, 2018
   1b14043

2. Replace root coordinate space optimization …

   This check is no longer necessarily true with the introduction of
   ClipChains, which make it harder to make assumptions about what the
   coordinate system of our clip chain looks like.
   
   Instead replace it with a similar check, which should cover more
   situations. When our clip chain only contains clips from our local
   coordinate system and they are all optimized away, just rely on the
   calculated local clip rect.

   

   mrobinson committed Jan 18, 2018

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