Fixed issue #1302.

src/renderer_d3d11.cpp

@@ -1319,6 +1319,8 @@ BX_PRAGMA_DIAGNOSTIC_POP();
 						goto error;
 					}
 
+					m_swapEffect = DXGI_SWAP_EFFECT_FLIP_SEQUENTIAL;
+
 					bx::memSet(&m_scd, 0, sizeof(m_scd) );
 					m_scd.BufferDesc.Width  = _init.resolution.m_width;
 					m_scd.BufferDesc.Height = _init.resolution.m_height;
@@ -1328,8 +1330,8 @@ BX_PRAGMA_DIAGNOSTIC_POP();
 					m_scd.SampleDesc.Count   = 1;
 					m_scd.SampleDesc.Quality = 0;
 					m_scd.BufferUsage  = DXGI_USAGE_RENDER_TARGET_OUTPUT;
-					m_scd.BufferCount  = 2;
-					m_scd.SwapEffect   = DXGI_SWAP_EFFECT_FLIP_SEQUENTIAL;
+					m_scd.BufferCount  = 1;
+					m_scd.SwapEffect   = m_swapEffect;
 					m_scd.OutputWindow = (HWND)g_platformData.nwh;
 					m_scd.Windowed     = true;
 
@@ -1341,7 +1343,9 @@ BX_PRAGMA_DIAGNOSTIC_POP();
 					{
 						// DXGI_SWAP_EFFECT_FLIP_SEQUENTIAL is not available on win7
 						// Try again with DXGI_SWAP_EFFECT_DISCARD
-						m_scd.SwapEffect = DXGI_SWAP_EFFECT_DISCARD;
+						m_swapEffect = DXGI_SWAP_EFFECT_DISCARD;
+						m_scd.BufferCount = 1;
+						m_scd.SwapEffect  = m_swapEffect;
 						hr = m_factory->CreateSwapChain(m_device
 							, &m_scd
 							, &m_swapChain
@@ -2706,6 +2710,11 @@ BX_PRAGMA_DIAGNOSTIC_POP();
 
 						DX_RELEASE(m_swapChain, 0);
 
+						m_scd.SwapEffect = m_scd.SampleDesc.Count != 1
+							? DXGI_SWAP_EFFECT_DISCARD
+							: m_swapEffect
+							;
+
 						SwapChainDesc* scd = &m_scd;
 						SwapChainDesc swapChainScd;
 						if (0 != (m_resolution.m_flags & BGFX_RESET_HMD)
@@ -3870,6 +3879,7 @@ BX_PRAGMA_DIAGNOSTIC_POP();
 #endif // BX_PLATFORM_WINDOWS
 
 		SwapChainDesc m_scd;
+		DXGI_SWAP_EFFECT m_swapEffect;
 		uint32_t m_maxAnisotropy;
 		bool m_depthClamp;
 		bool m_wireframe;
@@ -6906,6 +6916,8 @@ BX_PRAGMA_DIAGNOSTIC_POP();
 
 			PIX_ENDEVENT();
 		}
+
+		m_deviceCtx->OMSetRenderTargets(0, NULL, NULL);
 	}
 } /* namespace d3d11 */ } // namespace bgfx