kc3-lang/angle

2017-09-20T15:42:09

D3D11: Implement a dirty bit for Shaders. This allows us to skip calling the dynamic shader generation and program shader application when there haven't been any state changes. It builds on the previous work that immediately update state caches in the VertexArray11 and Framebuffer11. It should improve performance in draw-call limited applications by a small margin. For reference, here are the conditions under which the shaders are refreshed: 1. Directly changing the program executable 2. The vertex attribute layout 3. The fragment shader's rendertargets 4. Enabling/disabling rasterizer discard 5. Enabling/disabling transform feedback 6. An internal shader was used 7. Drawing with/without point sprites Improves the score of the draw call stress test for the D3D11 back-end (with null driver) by about 40% on my test machine. The 9_3 back-end seems to have an issue where the getSRV call to a texture storage can change the "use level zero workaround" status of the storage, which in turn will invalidate the state. Since this is localized to 9_3 only, put in a hack to disable an assert check for now. BUG=angleproject:2151 Change-Id: Idbd0a31376691b33972e735d5833a9b02a8a4aa9 Reviewed-on: https://chromium-review.googlesource.com/666278 Reviewed-by: Geoff Lang <geofflang@chromium.org> Reviewed-by: Frank Henigman <fjhenigman@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>