win8/metro_driver/direct3d_helper.cc

   1 // Copyright 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "stdafx.h"
   6 #include <corewindow.h>
   7 #include <windows.applicationmodel.core.h>
   8 #include <windows.graphics.display.h>
   9
  10 #include "win8/metro_driver/direct3d_helper.h"
  11 #include "base/logging.h"
  12 #include "base/win/windows_version.h"
  13 #include "ui/gfx/win/dpi.h"
  14 #include "win8/metro_driver/winrt_utils.h"
  15
  16 namespace {
  17
  18 void CheckIfFailed(HRESULT hr) {
  19   DCHECK(!FAILED(hr));
  20   if (FAILED(hr))
  21     DVLOG(0) << "Direct3D call failed, hr = " << hr;
  22 }
  23
  24 // TODO(ananta)
  25 // This function does not return the correct value as the IDisplayProperties
  26 // interface does not work correctly in Windows 8 in metro mode. Needs
  27 // more investigation.
  28 float GetLogicalDpi() {
  29   mswr::ComPtr<wingfx::Display::IDisplayPropertiesStatics> display_properties;
  30   CheckIfFailed(winrt_utils::CreateActivationFactory(
  31       RuntimeClass_Windows_Graphics_Display_DisplayProperties,
  32       display_properties.GetAddressOf()));
  33   float dpi = 0.0;
  34   CheckIfFailed(display_properties->get_LogicalDpi(&dpi));
  35   return dpi;
  36 }
  37
  38 float ConvertDipsToPixels(float dips) {
  39   return floor(dips * gfx::GetDPIScale() + 0.5f);
  40 }
  41
  42 }
  43
  44 namespace metro_driver {
  45
  46 Direct3DHelper::Direct3DHelper() {
  47 }
  48
  49 Direct3DHelper::~Direct3DHelper() {
  50 }
  51
  52 void Direct3DHelper::Initialize(winui::Core::ICoreWindow* window) {
  53   window_ = window;
  54   CreateDeviceResources();
  55   CreateWindowSizeDependentResources();
  56 }
  57
  58 // TODO(scottmg): Need to handle resize messages and recreation.
  59
  60 void Direct3DHelper::CreateDeviceResources() {
  61   unsigned int creation_flags = D3D11_CREATE_DEVICE_BGRA_SUPPORT;
  62   D3D_FEATURE_LEVEL feature_levels[] = {
  63     D3D_FEATURE_LEVEL_11_1,
  64     D3D_FEATURE_LEVEL_11_0,
  65     D3D_FEATURE_LEVEL_10_1,
  66     D3D_FEATURE_LEVEL_10_0,
  67     D3D_FEATURE_LEVEL_9_3,
  68     D3D_FEATURE_LEVEL_9_2,
  69     D3D_FEATURE_LEVEL_9_1,
  70   };
  71
  72   mswr::ComPtr<ID3D11Device> device;
  73   mswr::ComPtr<ID3D11DeviceContext> context;
  74   CheckIfFailed(
  75       D3D11CreateDevice(
  76           nullptr,
  77           D3D_DRIVER_TYPE_HARDWARE,
  78           nullptr,
  79           creation_flags,
  80           feature_levels,
  81           ARRAYSIZE(feature_levels),
  82           D3D11_SDK_VERSION,
  83           &device,
  84           &feature_level_,
  85           &context));
  86   CheckIfFailed(device.As(&d3d_device_));
  87   CheckIfFailed(context.As(&d3d_context_));
  88 }
  89
  90 void Direct3DHelper::CreateWindowSizeDependentResources() {
  91   float window_width = 0;
  92   float window_height = 0;
  93
  94   if (base::win::GetVersion() >= base::win::VERSION_WIN8) {
  95     // Windows 8 returns in DIPs.
  96     CheckIfFailed(window_->get_Bounds(&window_bounds_));
  97     window_width = ConvertDipsToPixels(window_width);
  98     window_height = ConvertDipsToPixels(window_height);
  99   }
 100
 101   // TODO(scottmg): Orientation.
 102
 103   if (swap_chain_ != nullptr) {
 104     // TODO(scottmg): Resize if it already exists.
 105     NOTIMPLEMENTED();
 106   } else {
 107     DXGI_SWAP_CHAIN_DESC1 swap_chain_desc = { 0 };
 108     swap_chain_desc.Width = window_width;
 109     swap_chain_desc.Height = window_height;
 110     swap_chain_desc.Format = DXGI_FORMAT_B8G8R8A8_UNORM;
 111     swap_chain_desc.Stereo = false;
 112     swap_chain_desc.SampleDesc.Count = 1;
 113     swap_chain_desc.SampleDesc.Quality = 0;
 114     swap_chain_desc.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
 115     swap_chain_desc.BufferCount = 2; // TODO(scottmg): Probably 1 is fine.
 116     swap_chain_desc.Scaling = DXGI_SCALING_NONE;
 117     swap_chain_desc.SwapEffect = DXGI_SWAP_EFFECT_FLIP_SEQUENTIAL;
 118     swap_chain_desc.Flags = 0;
 119
 120     mswr::ComPtr<IDXGIDevice1> dxgi_device;
 121     CheckIfFailed(d3d_device_.As(&dxgi_device));
 122
 123     mswr::ComPtr<IDXGIAdapter> dxgi_adapter;
 124     CheckIfFailed(dxgi_device->GetAdapter(&dxgi_adapter));
 125
 126     mswr::ComPtr<IDXGIFactory2> dxgi_factory;
 127     CheckIfFailed(dxgi_adapter->GetParent(
 128         __uuidof(IDXGIFactory2), &dxgi_factory));
 129
 130     if (base::win::GetVersion() >= base::win::VERSION_WIN8) {
 131       // On Win8 we need the CoreWindow interface to create the Swapchain.
 132       CheckIfFailed(dxgi_factory->CreateSwapChainForCoreWindow(
 133           d3d_device_.Get(),
 134           reinterpret_cast<IUnknown*>(window_),
 135           &swap_chain_desc,
 136           nullptr,
 137           &swap_chain_));
 138     } else {
 139       // On Win7 we need the raw HWND to create the Swapchain.
 140       mswr::ComPtr<ICoreWindowInterop> interop;
 141       CheckIfFailed(window_->QueryInterface(interop.GetAddressOf()));
 142       HWND window = NULL;
 143       interop->get_WindowHandle(&window);
 144
 145       swap_chain_desc.Scaling = DXGI_SCALING_STRETCH;
 146       swap_chain_desc.SwapEffect = DXGI_SWAP_EFFECT_DISCARD;
 147
 148       CheckIfFailed(dxgi_factory->CreateSwapChainForHwnd(
 149           d3d_device_.Get(),
 150           window,
 151           &swap_chain_desc,
 152           nullptr,
 153           nullptr,
 154           &swap_chain_));
 155       // Prevent DXGI from monitoring an application message queue and thus
 156       // attempt mode changes. For e.g. Alt + Enter by default causes
 157       // DXGI to attempt to take the window fullscreen.
 158       CheckIfFailed(dxgi_factory->MakeWindowAssociation(
 159           window, DXGI_MWA_NO_WINDOW_CHANGES));
 160     }
 161   }
 162 }
 163
 164 }  // namespace metro_driver