Use IDCompositionSurface to implement DirectCompositionSurfaceWin.

gpu/ipc/service/direct_composition_surface_win_unittest.cc

+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "gpu/ipc/service/direct_composition_surface_win.h"
+#include "base/memory/weak_ptr.h"
+#include "base/run_loop.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/base/win/hidden_window.h"
+#include "ui/gl/gl_angle_util_win.h"
+#include "ui/gl/gl_context.h"
+#include "ui/gl/init/gl_factory.h"
+
+namespace gpu {
+namespace {
+
+class TestImageTransportSurfaceDelegate
+    : public ImageTransportSurfaceDelegate,
+      public base::SupportsWeakPtr<TestImageTransportSurfaceDelegate> {
+ public:
+  ~TestImageTransportSurfaceDelegate() override {}
+
+  // ImageTransportSurfaceDelegate implementation.
+  void DidCreateAcceleratedSurfaceChildWindow(
+      SurfaceHandle parent_window,
+      SurfaceHandle child_window) override {}
+  void DidSwapBuffersComplete(SwapBuffersCompleteParams params) override {}
+  const gles2::FeatureInfo* GetFeatureInfo() const override { return nullptr; }
+  void SetLatencyInfoCallback(const LatencyInfoCallback& callback) override {}
+  void UpdateVSyncParameters(base::TimeTicks timebase,
+                             base::TimeDelta interval) override {}
+};
+
+TEST(DirectCompositionSurfaceTest, TestMakeCurrent) {
+  if (!gl::QueryDirectCompositionDevice(
+          gl::QueryD3D11DeviceObjectFromANGLE())) {
+    LOG(ERROR) << "GL implementation not using DirectComposition";

[dcheng, 2017/02/15 06:57:05]

Or just FAIL() in a unit test (the return won't be needed anymore either, AFAIK)

+    return;
+  }
+
+  TestImageTransportSurfaceDelegate delegate;
+
+  scoped_refptr<DirectCompositionSurfaceWin> surface(
+      new DirectCompositionSurfaceWin(delegate.AsWeakPtr(),
+                                      ui::GetHiddenWindow()));
+  EXPECT_TRUE(surface->Initialize());
+
+  scoped_refptr<gl::GLContext> context =
+      gl::init::CreateGLContext(nullptr, surface.get(), gl::GLContextAttribs());
+  EXPECT_TRUE(surface->Resize(gfx::Size(100, 100), 1.0, true));
+
+  // First SetDrawRectangle must be full size of surface.
+  EXPECT_FALSE(surface->SetDrawRectangle(gfx::Rect(0, 0, 50, 50)));
+  EXPECT_TRUE(surface->SetDrawRectangle(gfx::Rect(0, 0, 100, 100)));
+
+  // SetDrawRectangle can't be called again until swap.
+  EXPECT_FALSE(surface->SetDrawRectangle(gfx::Rect(0, 0, 100, 100)));
+
+  EXPECT_TRUE(context->MakeCurrent(surface.get()));
+  EXPECT_EQ(gfx::SwapResult::SWAP_ACK, surface->SwapBuffers());
+
+  EXPECT_TRUE(context->IsCurrent(surface.get()));
+
+  // SetDrawRectangle must be contained within surface.
+  EXPECT_FALSE(surface->SetDrawRectangle(gfx::Rect(0, 0, 101, 101)));
+  EXPECT_TRUE(surface->SetDrawRectangle(gfx::Rect(0, 0, 100, 100)));
+  EXPECT_TRUE(context->IsCurrent(surface.get()));
+
+  EXPECT_TRUE(surface->Resize(gfx::Size(50, 50), 1.0, true));
+  EXPECT_TRUE(surface->SetDrawRectangle(gfx::Rect(0, 0, 50, 50)));
+  EXPECT_TRUE(context->IsCurrent(surface.get()));
+
+  scoped_refptr<DirectCompositionSurfaceWin> surface2(
+      new DirectCompositionSurfaceWin(delegate.AsWeakPtr(),
+                                      ui::GetHiddenWindow()));
+  EXPECT_TRUE(surface2->Initialize());
+
+  scoped_refptr<gl::GLContext> context2 = gl::init::CreateGLContext(
+      nullptr, surface2.get(), gl::GLContextAttribs());
+  EXPECT_TRUE(context2->MakeCurrent(surface2.get()));
+  EXPECT_TRUE(surface2->Resize(gfx::Size(100, 100), 1.0, true));
+  // The previous IDCompositionSurface should be suspended when another
+  // surface is being drawn to.
+  EXPECT_TRUE(surface2->SetDrawRectangle(gfx::Rect(0, 0, 100, 100)));
+  EXPECT_TRUE(context2->IsCurrent(surface2.get()));
+
+  // It should be possible to switch back to the previous surface and
+  // unsuspend it.
+  EXPECT_TRUE(context->MakeCurrent(surface.get()));
+
+  context2 = nullptr;
+  surface2 = nullptr;
+  context = nullptr;
+  surface = nullptr;
+  base::RunLoop run_loop;
+  run_loop.RunUntilIdle();

[dcheng, 2017/02/15 06:57:05]

Or just base::RunLoop().RunUntilIdle() to save a line

+}
+
+}  // namespace
+}  // namespace gpu