Enabled vsync in SwapChain11.

src/libGLESv2/renderer/SwapChain11.cpp

@@ -40,6 +40,7 @@ SwapChain11::SwapChain11(Renderer11 *renderer, HWND window, HANDLE shareHandle,
     mPassThroughPS = NULL;
     mWidth = -1;
     mHeight = -1;
+    mSwapInterval = 0;
     mAppCreatedShareHandle = mShareHandle != NULL;
 }
 
@@ -193,6 +194,13 @@ EGLint SwapChain11::reset(int backbufferWidth, int backbufferHeight, EGLint swap
         mDepthStencilDSView = NULL;
     }
 
+    mSwapInterval = static_cast<unsigned int>(swapInterval);
+    if (mSwapInterval > 4)
+    {
+        // IDXGISwapChain::Present documentation states that valid sync intervals are in the [0,4] range
+        return EGL_BAD_PARAMETER;
+    }
+
     // If the app passed in a share handle, open the resource
     // See EGL_ANGLE_d3d_share_handle_client_buffer
     if (mAppCreatedShareHandle)
@@ -528,7 +536,7 @@ EGLint SwapChain11::swapRect(EGLint x, EGLint y, EGLint width, EGLint height)
 
     // Draw
     deviceContext->Draw(4, 0);
-    mSwapChain->Present(0, 0);
+    mSwapChain->Present(mSwapInterval, 0);
 
     // Unbind
     static ID3D11ShaderResourceView *const nullSRV = NULL;

src/libGLESv2/renderer/SwapChain11.h

@@ -48,6 +48,7 @@ class SwapChain11 : public SwapChain
     EGLint mHeight;
     EGLint mWidth;
     bool mAppCreatedShareHandle;
+    unsigned int mSwapInterval;
 
     IDXGISwapChain *mSwapChain;