Commits on Dec 4, 2017

1. Refactor ClipScrollTree::update …

   Rework ClipScrollTree::update, eliminated members which are now
   duplicated in ClipScrollNodeData and reducing the amount of unnecessary
   work. There are a few main thrusts here:
   
   1. Don't do matrix operations if it's not necessary.
   Transform3D::pre_mul was showing up in CPU profiles, and this makes it
   much less significant.
   2. Don't spend time setting up state if we are not going to recurse.
   3. When we encounter an empty node (including those clipped out), do as
   little as possible. This includes setting update state or calculating
   things for ClipScrollNodeData.

   

   mrobinson committed Dec 4, 2017
   f9f2b7d

2. Use transform_rect in prim_store.rs …

   Instead of duplicating the functionality of transform_rect in
   get_local_bounding_rect, just use the function from utils.rs.

   

   mrobinson committed Dec 4, 2017
   41c5eb1

3. Extract bounding rect calculation from TransformedRect …

   Instead of calculating some things that we no longer need for
   TransformedRect, we simply calculate the screen bounding rect. We can
   then completely remove TransformedRect. This significantly the presence
   of getting the screen bounding rect on the CPU profile.

   

   mrobinson committed Dec 4, 2017

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   1751ecc

4. Remove some unused code from util.rs …

   Some of the remaining methods in util.rs are duplicated in euclid
   itself and others are now just simply unused.

   

   mrobinson committed Dec 4, 2017

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   2901a69