From 2bce60c5892141a214fda9c98d418d59aac56c64 Mon Sep 17 00:00:00 2001
From: Walt Destler <walt@waltdestler.com>
Date: Mon, 30 May 2016 07:25:32 -0700
Subject: [PATCH] SwapChain.Present and SwapChain1.Present now return their
 result codes so that the application can check whether the window is
 occluded. This should resolve #746.

---
 Source/SharpDX.DXGI/Mapping.xml   | 3 ++-
 Source/SharpDX.DXGI/SwapChain1.cs | 4 ++--
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/Source/SharpDX.DXGI/Mapping.xml b/Source/SharpDX.DXGI/Mapping.xml
index f5db86e22..f59ba276b 100644
--- a/Source/SharpDX.DXGI/Mapping.xml
+++ b/Source/SharpDX.DXGI/Mapping.xml
@@ -227,7 +227,8 @@
     <map param="IVirtualSurfaceImageSourceNative::GetUpdateRectCount::count" return="true"/>
     <map method="IVirtualSurfaceImageSourceNative::GetUpdateRects" visibility="internal"/>
 
-    <map method="IDXGISwapChain1::Present1" visibility="internal"/>
+    <map method="IDXGISwapChain::Present" hresult="true"/>
+    <map method="IDXGISwapChain1::Present1" visibility="internal" hresult="true"/>
     <map param="IDXGISwapChain1::Present1::pPresentParameters" type="void"/>
     <map param="IDXGISwapChain1::Present1::PresentFlags" type="DXGI_PRESENT_FLAGS" />
 
diff --git a/Source/SharpDX.DXGI/SwapChain1.cs b/Source/SharpDX.DXGI/SwapChain1.cs
index 4b6d0bac6..edd5a0211 100644
--- a/Source/SharpDX.DXGI/SwapChain1.cs
+++ b/Source/SharpDX.DXGI/SwapChain1.cs
@@ -79,7 +79,7 @@ public SwapChain1(Factory2 factory, ComObject device, ref SwapChainDescription1
         /// </remarks>	
         /// <include file='.\..\Documentation\CodeComments.xml' path="/comments/comment[@id='IDXGISwapChain1::Present1']/*"/>	
         /// <unmanaged>HRESULT IDXGISwapChain1::Present1([In] unsigned int SyncInterval,[In] unsigned int PresentFlags,[In] const void* pPresentParameters)</unmanaged>	
-        public unsafe void Present(int syncInterval, PresentFlags presentFlags, PresentParameters presentParameters)
+        public unsafe Result Present(int syncInterval, PresentFlags presentFlags, PresentParameters presentParameters)
         {
             bool hasScrollRectangle = presentParameters.ScrollRectangle.HasValue;
             bool hasScrollOffset = presentParameters.ScrollOffset.HasValue;
@@ -95,7 +95,7 @@ public unsafe void Present(int syncInterval, PresentFlags presentFlags, PresentP
                 native.PScrollRect = hasScrollRectangle ? new IntPtr(&scrollRectangle) : IntPtr.Zero;
                 native.PScrollOffset = hasScrollOffset ? new IntPtr(&scrollOffset) : IntPtr.Zero;
 
-                Present1(syncInterval, presentFlags, new IntPtr(&native));
+                return Present1(syncInterval, presentFlags, new IntPtr(&native));
             }
         }
     }