Second part of porting Chrome Ash to Windows 7

win8/metro_driver/direct3d_helper.cc

 // Copyright 2012 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 "stdafx.h"
 #include "win8/metro_driver/direct3d_helper.h"
 #include "win8/metro_driver/winrt_utils.h"
 
 #include "base/logging.h"
+#include "base/win/windows_version.h"
 
+#include <corewindow.h>
+#include <windows.applicationmodel.core.h>
 #include <windows.graphics.display.h>
 
 namespace {
 
 void CheckIfFailed(HRESULT hr) {
   DCHECK(!FAILED(hr));
   if (FAILED(hr))
     DVLOG(0) << "Direct3D call failed, hr = " << hr;
 }
 
@@ skipping 55 matching lines @@
           ARRAYSIZE(feature_levels),
           D3D11_SDK_VERSION,
           &device,
           &feature_level_,
           &context));
   CheckIfFailed(device.As(&d3d_device_));
   CheckIfFailed(context.As(&d3d_context_));
 }
 
 void Direct3DHelper::CreateWindowSizeDependentResources() {
-  CheckIfFailed(window_->get_Bounds(&window_bounds_));
-  float window_width = ConvertDipsToPixels(window_bounds_.Width);
-  float window_height = ConvertDipsToPixels(window_bounds_.Height);
+  float window_width = 0;
+  float window_height = 0;
+
+  if (base::win::GetVersion() >= base::win::VERSION_WIN8) {
+    // Windows 8 returns in DIPs.
+    CheckIfFailed(window_->get_Bounds(&window_bounds_));
+    window_width = ConvertDipsToPixels(window_width);
+    window_height = ConvertDipsToPixels(window_height);
+  }
 
   // TODO(scottmg): Orientation.
 
   if (swap_chain_ != nullptr) {
     // TODO(scottmg): Resize if it already exists.
     NOTIMPLEMENTED();
   } else {
     DXGI_SWAP_CHAIN_DESC1 swap_chain_desc = { 0 };
     swap_chain_desc.Width = window_width;
     swap_chain_desc.Height = window_height;
@@ skipping 10 matching lines @@
     mswr::ComPtr<IDXGIDevice1> dxgi_device;
     CheckIfFailed(d3d_device_.As(&dxgi_device));
 
     mswr::ComPtr<IDXGIAdapter> dxgi_adapter;
     CheckIfFailed(dxgi_device->GetAdapter(&dxgi_adapter));
 
     mswr::ComPtr<IDXGIFactory2> dxgi_factory;
     CheckIfFailed(dxgi_adapter->GetParent(
         __uuidof(IDXGIFactory2), &dxgi_factory));
 
-    CheckIfFailed(dxgi_factory->CreateSwapChainForCoreWindow(
-        d3d_device_.Get(),
-        reinterpret_cast<IUnknown*>(window_),
-        &swap_chain_desc,
-        nullptr,
-        &swap_chain_));
+    if (base::win::GetVersion() >= base::win::VERSION_WIN8) {
+      // On Win8 we need the CoreWindow interface to create the Swapchain.
+      CheckIfFailed(dxgi_factory->CreateSwapChainForCoreWindow(
+          d3d_device_.Get(),
+          reinterpret_cast<IUnknown*>(window_),
+          &swap_chain_desc,
+          nullptr,
+          &swap_chain_));
+    } else {
+      // On Win7 we need the raw HWND to create the Swapchain.
+      mswr::ComPtr<ICoreWindowInterop> interop;
+      CheckIfFailed(window_->QueryInterface(interop.GetAddressOf()));
+      HWND window = NULL;
+      interop->get_WindowHandle(&window);
+
+      swap_chain_desc.Scaling = DXGI_SCALING_STRETCH;
+      swap_chain_desc.SwapEffect = DXGI_SWAP_EFFECT_DISCARD;
+
+      CheckIfFailed(dxgi_factory->CreateSwapChainForHwnd(
+          d3d_device_.Get(),
+          window,
+          &swap_chain_desc,
+          nullptr,
+          nullptr,
+          &swap_chain_));
+    }
   }
 }
 
 }  // namespace metro_driver