in-chrome viewer for metro

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 <windows.graphics.display.h>
+
+namespace {
+
+void CheckIfFailed(HRESULT hr) {
+  DCHECK(!FAILED(hr));
+  if (FAILED(hr))
+    DVLOG(ERROR) << "Direct3D call failed, hr = " << hr;
+}
+
+float GetLogicalDpi() {
+  mswr::ComPtr<wingfx::Display::IDisplayPropertiesStatics> display_properties;
+  CheckIfFailed(winrt_utils::CreateActivationFactory(
+      RuntimeClass_Windows_Graphics_Display_DisplayProperties,
+      display_properties.GetAddressOf()));
+  float dpi = 0.0;
+  CheckIfFailed(display_properties->get_LogicalDpi(&dpi));
+  return dpi;
+}
+
+float ConvertDipsToPixels(float dips) {
+  static const float dips_per_inch = 96.f;
+  float logical_dpi = GetLogicalDpi();
+  return floor(dips * logical_dpi / dips_per_inch + 0.5f);
+}
+
+}
+
+namespace metro_driver {
+
+Direct3DHelper::Direct3DHelper() {
+}
+
+Direct3DHelper::~Direct3DHelper() {
+}
+
+void Direct3DHelper::Initialize(winui::Core::ICoreWindow* window) {
+  window_ = window;
+  CreateDeviceResources();
+  CreateWindowSizeDependentResources();
+}
+
+// TODO(scottmg): Need to handle resize messages and recreation.
+
+void Direct3DHelper::CreateDeviceResources() {
+  unsigned int creation_flags = D3D11_CREATE_DEVICE_BGRA_SUPPORT;
+  D3D_FEATURE_LEVEL feature_levels[] = {
+    D3D_FEATURE_LEVEL_11_1,
+    D3D_FEATURE_LEVEL_11_0,
+    D3D_FEATURE_LEVEL_10_1,
+    D3D_FEATURE_LEVEL_10_0,
+    D3D_FEATURE_LEVEL_9_3,
+    D3D_FEATURE_LEVEL_9_2,
+    D3D_FEATURE_LEVEL_9_1,
+  };
+
+  mswr::ComPtr<ID3D11Device> device;
+  mswr::ComPtr<ID3D11DeviceContext> context;
+  CheckIfFailed(
+      D3D11CreateDevice(
+          nullptr,
+          D3D_DRIVER_TYPE_HARDWARE,
+          nullptr,
+          creation_flags,
+          feature_levels,
+          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);
+
+  // 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;
+    swap_chain_desc.Format = DXGI_FORMAT_B8G8R8A8_UNORM;
+    swap_chain_desc.Stereo = false;
+    swap_chain_desc.SampleDesc.Count = 1;
+    swap_chain_desc.SampleDesc.Quality = 0;
+    swap_chain_desc.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
+    swap_chain_desc.BufferCount = 2; // TODO(scottmg): Probably 1 is fine.
+    swap_chain_desc.Scaling = DXGI_SCALING_NONE;
+    swap_chain_desc.SwapEffect = DXGI_SWAP_EFFECT_FLIP_SEQUENTIAL;
+    swap_chain_desc.Flags = 0;
+
+    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_));
+  }
+}
+
+}  // namespace metro_driver