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Martin Robinson 36406cdba8 servo: Merge #9756 - Flatten display list structure (from mrobinson:flat-display-lists-webrender); r=pcwalton ... Instead of producing a tree of stacking contexts, display list generation now produces a flat list of display items and a tree of stacking contexts. This will eventually allow display list construction to produce and modify WebRender vertex buffers directly, removing the overhead of display list conversion. This change also moves layerization of the display list to the paint thread, since it isn't currently useful for WebRender. To accomplish this, display list generation now takes three passes of the flow tree: 1. Calculation of absolute positions. 2. Collection of a tree of stacking contexts. 3. Creation of a list of display items. After collection of display items, they are sorted based upon the index of their parent stacking contexts and their position in CSS 2.1 Appendeix E stacking order. This is a big change, but it actually simplifies display list generation. Source-Repo: https://github.com/servo/servo Source-Revision: 62814f7cb486bc267a796b7ce58c51d59240fad0		2016-03-02 05:52:08 +05:01
servo	servo: Merge #9756 - Flatten display list structure (from mrobinson:flat-display-lists-webrender); r=pcwalton	2016-03-02 05:52:08 +05:01