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 "win8/metro_driver/direct3d_helper.h"
   7 #include "win8/metro_driver/winrt_utils.h"
   8
   9 #include "base/logging.h"
  10 #include "base/win/windows_version.h"
  11
  12 #include <corewindow.h>
  13 #include <windows.applicationmodel.core.h>
  14 #include <windows.graphics.display.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 float GetLogicalDpi() {
  25   mswr::ComPtr<wingfx::Display::IDisplayPropertiesStatics> display_properties;
  26   CheckIfFailed(winrt_utils::CreateActivationFactory(
  27       RuntimeClass_Windows_Graphics_Display_DisplayProperties,
  28       display_properties.GetAddressOf()));
  29   float dpi = 0.0;
  30   CheckIfFailed(display_properties->get_LogicalDpi(&dpi));
  31   return dpi;
  32 }
  33
  34 float ConvertDipsToPixels(float dips) {
  35   static const float dips_per_inch = 96.f;
  36   float logical_dpi = GetLogicalDpi();
  37   return floor(dips * logical_dpi / dips_per_inch + 0.5f);
  38 }
  39
  40 }
  41
  42 namespace metro_driver {
  43
  44 Direct3DHelper::Direct3DHelper() {
  45 }
  46
  47 Direct3DHelper::~Direct3DHelper() {
  48 }
  49
  50 void Direct3DHelper::Initialize(winui::Core::ICoreWindow* window) {
  51   window_ = window;
  52   CreateDeviceResources();
  53   CreateWindowSizeDependentResources();
  54 }
  55
  56 // TODO(scottmg): Need to handle resize messages and recreation.
  57
  58 void Direct3DHelper::CreateDeviceResources() {
  59   unsigned int creation_flags = D3D11_CREATE_DEVICE_BGRA_SUPPORT;
  60   D3D_FEATURE_LEVEL feature_levels[] = {
  61     D3D_FEATURE_LEVEL_11_1,
  62     D3D_FEATURE_LEVEL_11_0,
  63     D3D_FEATURE_LEVEL_10_1,
  64     D3D_FEATURE_LEVEL_10_0,
  65     D3D_FEATURE_LEVEL_9_3,
  66     D3D_FEATURE_LEVEL_9_2,
  67     D3D_FEATURE_LEVEL_9_1,
  68   };
  69
  70   mswr::ComPtr<ID3D11Device> device;
  71   mswr::ComPtr<ID3D11DeviceContext> context;
  72   CheckIfFailed(
  73       D3D11CreateDevice(
  74           nullptr,
  75           D3D_DRIVER_TYPE_HARDWARE,
  76           nullptr,
  77           creation_flags,
  78           feature_levels,
  79           ARRAYSIZE(feature_levels),
  80           D3D11_SDK_VERSION,
  81           &device,
  82           &feature_level_,
  83           &context));
  84   CheckIfFailed(device.As(&d3d_device_));
  85   CheckIfFailed(context.As(&d3d_context_));
  86 }
  87
  88 void Direct3DHelper::CreateWindowSizeDependentResources() {
  89   float window_width = 0;
  90   float window_height = 0;
  91
  92   if (base::win::GetVersion() >= base::win::VERSION_WIN8) {
  93     // Windows 8 returns in DIPs.
  94     CheckIfFailed(window_->get_Bounds(&window_bounds_));
  95     window_width = ConvertDipsToPixels(window_width);
  96     window_height = ConvertDipsToPixels(window_height);
  97   }
  98
  99   // TODO(scottmg): Orientation.
 100
 101   if (swap_chain_ != nullptr) {
 102     // TODO(scottmg): Resize if it already exists.
 103     NOTIMPLEMENTED();
 104   } else {
 105     DXGI_SWAP_CHAIN_DESC1 swap_chain_desc = { 0 };
 106     swap_chain_desc.Width = window_width;
 107     swap_chain_desc.Height = window_height;
 108     swap_chain_desc.Format = DXGI_FORMAT_B8G8R8A8_UNORM;
 109     swap_chain_desc.Stereo = false;
 110     swap_chain_desc.SampleDesc.Count = 1;
 111     swap_chain_desc.SampleDesc.Quality = 0;
 112     swap_chain_desc.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
 113     swap_chain_desc.BufferCount = 2; // TODO(scottmg): Probably 1 is fine.
 114     swap_chain_desc.Scaling = DXGI_SCALING_NONE;
 115     swap_chain_desc.SwapEffect = DXGI_SWAP_EFFECT_FLIP_SEQUENTIAL;
 116     swap_chain_desc.Flags = 0;
 117
 118     mswr::ComPtr<IDXGIDevice1> dxgi_device;
 119     CheckIfFailed(d3d_device_.As(&dxgi_device));
 120
 121     mswr::ComPtr<IDXGIAdapter> dxgi_adapter;
 122     CheckIfFailed(dxgi_device->GetAdapter(&dxgi_adapter));
 123
 124     mswr::ComPtr<IDXGIFactory2> dxgi_factory;
 125     CheckIfFailed(dxgi_adapter->GetParent(
 126         __uuidof(IDXGIFactory2), &dxgi_factory));
 127
 128     if (base::win::GetVersion() >= base::win::VERSION_WIN8) {
 129       // On Win8 we need the CoreWindow interface to create the Swapchain.
 130       CheckIfFailed(dxgi_factory->CreateSwapChainForCoreWindow(
 131           d3d_device_.Get(),
 132           reinterpret_cast<IUnknown*>(window_),
 133           &swap_chain_desc,
 134           nullptr,
 135           &swap_chain_));
 136     } else {
 137       // On Win7 we need the raw HWND to create the Swapchain.
 138       mswr::ComPtr<ICoreWindowInterop> interop;
 139       CheckIfFailed(window_->QueryInterface(interop.GetAddressOf()));
 140       HWND window = NULL;
 141       interop->get_WindowHandle(&window);
 142
 143       swap_chain_desc.Scaling = DXGI_SCALING_STRETCH;
 144       swap_chain_desc.SwapEffect = DXGI_SWAP_EFFECT_DISCARD;
 145
 146       CheckIfFailed(dxgi_factory->CreateSwapChainForHwnd(
 147           d3d_device_.Get(),
 148           window,
 149           &swap_chain_desc,
 150           nullptr,
 151           nullptr,
 152           &swap_chain_));
 153     }
 154   }
 155 }
 156
 157 }  // namespace metro_driver