commit 11b703904ab61b08f08aae8e36cdb726826e6487
author Brandon Jones <brandon1.jones@intel.com> Tue Apr 30 08:31:38 2019 +0000
committer Commit Bot service account <commit-bot@chromium.org> Tue Apr 30 08:31:38 2019 +0000
tree ec57e6dec2f2d838066934981846ed7f4973bd20
parent 4baba8266bb4313a8b27197bc26da4af3c0dc0dd

Increase D3D12 Swap Chain Buffers to 3

Adds an additional buffer and frame to the D3D12 swap chain to
unthrottle fps in situations where we can't maintain a constant 60fps.

Bug: dawn:142
Change-Id: I06ef697ca37608dc51816dd99de5534cb8c9b843
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/6840
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Reviewed-by: Rafael Cintron <rafael.cintron@microsoft.com>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>

src/dawn_native/d3d12/NativeSwapChainImplD3D12.cpp

diff --git a/src/dawn_native/d3d12/NativeSwapChainImplD3D12.cpp b/src/dawn_native/d3d12/NativeSwapChainImplD3D12.cpp
index 50d006f..17120f6 100644
--- a/src/dawn_native/d3d12/NativeSwapChainImplD3D12.cpp
+++ b/src/dawn_native/d3d12/NativeSwapChainImplD3D12.cpp
@@ -35,7 +35,7 @@
             return usage;
         }
 
-        static constexpr unsigned int kFrameCount = 2;
+        static constexpr unsigned int kFrameCount = 3;
     }  // anonymous namespace
 
     NativeSwapChainImpl::NativeSwapChainImpl(Device* device, HWND window)