D3D9: Enable device-ex by default.

src/renderer_d3d9.cpp

@@ -727,6 +727,17 @@ namespace bgfx { namespace d3d9
 				mbstowcs(s_viewNameW[ii], name, BGFX_CONFIG_MAX_VIEW_NAME_RESERVED);
 			}
 
+			if (NULL != m_deviceEx)
+			{
+				int32_t gpuPriority;
+				DX_CHECK(m_deviceEx->GetGPUThreadPriority(&gpuPriority) );
+				BX_TRACE("GPU thread priority: %d", gpuPriority);
+
+				uint32_t maxLatency;
+				DX_CHECK(m_deviceEx->GetMaximumFrameLatency(&maxLatency) );
+				BX_TRACE("GPU max frame latency: %d", maxLatency);
+			}
+
 			postReset();
 
 			m_initialized = true;

src/renderer_d3d9.h

@@ -6,7 +6,7 @@
 #ifndef BGFX_RENDERER_D3D9_H_HEADER_GUARD
 #define BGFX_RENDERER_D3D9_H_HEADER_GUARD
 
-#define BGFX_CONFIG_RENDERER_DIRECT3D9EX (BX_PLATFORM_WINDOWS && 0)
+#define BGFX_CONFIG_RENDERER_DIRECT3D9EX BX_PLATFORM_WINDOWS
 
 #if BX_PLATFORM_WINDOWS
 #	include <sal.h>