Allow presenting DXGI share handles as overlays.

gpu/ipc/service/direct_composition_surface_win.cc

Index: gpu/ipc/service/direct_composition_surface_win.cc
diff --git a/gpu/ipc/service/direct_composition_surface_win.cc b/gpu/ipc/service/direct_composition_surface_win.cc
index 0d6000250cd4344e0bb939d66ffaac4a9bc1d060..2e070bf1b186b0d193ad77b3a87975af64d42c5f 100644
--- a/gpu/ipc/service/direct_composition_surface_win.cc
+++ b/gpu/ipc/service/direct_composition_surface_win.cc
@@ -465,8 +465,8 @@ bool DCLayerTree::SwapChainPresenter::UploadVideoImages(
 
 void DCLayerTree::SwapChainPresenter::PresentToSwapChain(
     const ui::DCRendererLayerParams& params) {
-  gl::GLImageDXGI* image_dxgi =
-      gl::GLImageDXGI::FromGLImage(params.image[0].get());
+  gl::GLImageDXGIBase* image_dxgi =
+      gl::GLImageDXGIBase::FromGLImage(params.image[0].get());
   gl::GLImageMemory* y_image_memory = nullptr;
   gl::GLImageMemory* uv_image_memory = nullptr;
   if (params.image.size() >= 2) {
@@ -548,9 +548,13 @@ void DCLayerTree::SwapChainPresenter::PresentToSwapChain(
 
   base::win::ScopedComPtr<ID3D11Texture2D> input_texture;
   UINT input_level;
+  base::win::ScopedComPtr<IDXGIKeyedMutex> keyed_mutex;
   if (image_dxgi) {
     input_texture = image_dxgi->texture();
     input_level = (UINT)image_dxgi->level();
+    if (!input_texture)
+      return;
+    input_texture.CopyTo(keyed_mutex.GetAddressOf());
     staging_texture_.Reset();
   } else {
     DCHECK(y_image_memory);
@@ -615,6 +619,14 @@ void DCLayerTree::SwapChainPresenter::PresentToSwapChain(
   }
 
   {
+    if (keyed_mutex) {

[sunnyps, 2017/07/11 01:56:28]

nit: Can you add a comment about this?

+      const int kMaxSyncTime = 1000;  // ms
+      HRESULT hr = keyed_mutex->AcquireSync(0, kMaxSyncTime);
+      if (FAILED(hr)) {
+        DLOG(ERROR) << "Error acquiring keyed mutex: " << std::hex << hr;
+        return;
+      }
+    }
     D3D11_VIDEO_PROCESSOR_INPUT_VIEW_DESC in_desc = {};
     in_desc.ViewDimension = D3D11_VPIV_DIMENSION_TEXTURE2D;
     in_desc.Texture2D.ArraySlice = input_level;
@@ -646,6 +658,10 @@ void DCLayerTree::SwapChainPresenter::PresentToSwapChain(
     hr = video_context_->VideoProcessorBlt(video_processor_.Get(),
                                            out_view_.Get(), 0, 1, &stream);
     CHECK(SUCCEEDED(hr));
+    if (keyed_mutex) {
+      HRESULT hr = keyed_mutex->ReleaseSync(0);
+      DCHECK(SUCCEEDED(hr));
+    }
   }
 
   if (first_present) {