Annotate missing ComOutPtr in CompositionSwapchain and `DirectCom…

…position` (#1970)

`dcomp.h` and `Presentation.h` are missing some `_COM_Outptr_`
annotations, turning these functions in `windows-rs` to take a
meaningless `*mut *mut c_void`.  With this annotation the functions
return a generic `T: Interface` _and_ automatically pass its `&T::IID`
to the `riid` parameter resulting in a much more ergonomic API.

Also annotate some return-only functions with `RetVal` to make it easier
to retrieve these objects.

generation/WinSDK/emitter.settings.rsp

@@ -986,6 +986,13 @@ IWICImagingFactory::CreateDecoderFromFilename::pguidVendor=[Optional]
 DCompositionCreateDevice::dcompositionDevice=[ComOutPtr]
 DCompositionCreateDevice2::dcompositionDevice=[ComOutPtr]
 DCompositionCreateDevice3::dcompositionDevice=[ComOutPtr]
+DCompositionGetStatistics::frameStats=[RetVal]
+DCompositionGetTargetStatistics::targetStats=[RetVal]
+CreatePresentationFactory::presentationFactory=[ComOutPtr]
+IPresentationManager::GetPresentRetiringFence::fence=[ComOutPtr]
+IDCompositionTexture::GetAvailableFence::availableFence=[ComOutPtr]
+IDCompositionDevice::GetFrameStatistics::statistics=[RetVal]
+IDCompositionDevice2::GetFrameStatistics::statistics=[RetVal]
 HttpAddFragmentToCache::Overlapped=[In][Out][Optional][Retained]
 HttpCancelHttpRequest::Overlapped=[In][Out][Optional][Retained]
 HttpCreateRequestQueue::Flags=[Optional]

scripts/ChangesSinceLastRelease.txt

@@ -0,0 +1,8 @@
+# Annotate ComOutPtr in CompositionSwapchain and DirectComposition
+Windows.Win32.Graphics.CompositionSwapchain.Apis.CreatePresentationFactory : presentationFactory : [Out] => [ComOutPtr,Out]
+Windows.Win32.Graphics.CompositionSwapchain.IPresentationManager.GetPresentRetiringFence : fence : [Out,RetVal] => [ComOutPtr,Out,RetVal]
+Windows.Win32.Graphics.DirectComposition.Apis.DCompositionGetStatistics : frameStats : [Out] => [Out,RetVal]
+Windows.Win32.Graphics.DirectComposition.Apis.DCompositionGetTargetStatistics : targetStats : [Out] => [Out,RetVal]
+Windows.Win32.Graphics.DirectComposition.IDCompositionDevice.GetFrameStatistics : statistics : [Out] => [Out,RetVal]
+Windows.Win32.Graphics.DirectComposition.IDCompositionDevice2.GetFrameStatistics : statistics : [Out] => [Out,RetVal]
+Windows.Win32.Graphics.DirectComposition.IDCompositionTexture.GetAvailableFence : availableFence : [Out] => [ComOutPtr,Out]