kc3-lang/angle

2016-03-04T15:46:58

D3D: Use a single D3D buffer per static vertex attribute. The current caching logic stores multiple static attributes in a single buffer if the attributes share a D3D buffer - sometimes. If a buffer is 'committed' (has been used in a draw) then we would make a new D3D buffer for the next set of static attributes. Instead use a simpler scheme of a single D3D buffer for each static attribute. Also change rx::VertexBuffer to a reference counted class. This simplifies the caching logic for static vertex buffers (translated attributes) considerably. We only need to release the buffers when the ref count is zero, and ensure we track the ref count correctly when bound to D3D. This leads the way towards using a simpler dirty bit scheme for intelligent state updates, and less overhead doing work with buffer state updates. BUG=angleproject:1327 Change-Id: I99461d50b9663024eaa654cd56b42a63f1416d08 Reviewed-on: https://chromium-review.googlesource.com/330170 Reviewed-by: Zhenyao Mo <zmo@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>