Commits on Dec 25, 2017

1. Calculate local clipping rectangle per-primitive run …

   Instead of using the hierarchical nature of the ClipScrollTree to
   calculate local clipping rectangles for primitives, do it when we are
   about to render a particular primitive run. This will allow us to
   handle custom clip chains while maintaining local clipping rectangle
   optimizations. It also allows us to greatly simplify a lot of shader
   code that used to deal with both clipping and scrolling nodes, as the
   local clipping rectangle is now bundled into the primitives
   local_clip_rect.
   
   TransformOrOffset is the main struct that handles the efficient
   transformation of clipping rectangles between compatible coordinate
   systems. It will avoid doing expensive matrix operations as much as
   possible, which should make these calculations cheaper -- important now
   that they are done per-primitive run.

   

   mrobinson committed Dec 25, 2017
   205a85a

2. Remove parent_combined_viewport_rect from TransformUpdateState …

   It's unused now.

   

   mrobinson committed Dec 25, 2017

   Loading status checks…
   7ad7225