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
  11 #include <windows.graphics.display.h>
  12
  13 namespace {
  14
  15 void CheckIfFailed(HRESULT hr) {
  16   DCHECK(!FAILED(hr));
  17   if (FAILED(hr))
  18     DVLOG(0) << "Direct3D call failed, hr = " << hr;
  19 }
  20
  21 float GetLogicalDpi() {
  22   mswr::ComPtr<wingfx::Display::IDisplayPropertiesStatics> display_properties;
  23   CheckIfFailed(winrt_utils::CreateActivationFactory(
  24       RuntimeClass_Windows_Graphics_Display_DisplayProperties,
  25       display_properties.GetAddressOf()));
  26   float dpi = 0.0;
  27   CheckIfFailed(display_properties->get_LogicalDpi(&dpi));
  28   return dpi;
  29 }
  30
  31 float ConvertDipsToPixels(float dips) {
  32   static const float dips_per_inch = 96.f;
  33   float logical_dpi = GetLogicalDpi();
  34   return floor(dips * logical_dpi / dips_per_inch + 0.5f);
  35 }
  36
  37 }
  38
  39 namespace metro_driver {
  40
  41 Direct3DHelper::Direct3DHelper() {
  42 }
  43
  44 Direct3DHelper::~Direct3DHelper() {
  45 }
  46
  47 void Direct3DHelper::Initialize(winui::Core::ICoreWindow* window) {
  48   window_ = window;
  49   CreateDeviceResources();
  50   CreateWindowSizeDependentResources();
  51 }
  52
  53 // TODO(scottmg): Need to handle resize messages and recreation.
  54
  55 void Direct3DHelper::CreateDeviceResources() {
  56   unsigned int creation_flags = D3D11_CREATE_DEVICE_BGRA_SUPPORT;
  57   D3D_FEATURE_LEVEL feature_levels[] = {
  58     D3D_FEATURE_LEVEL_11_1,
  59     D3D_FEATURE_LEVEL_11_0,
  60     D3D_FEATURE_LEVEL_10_1,
  61     D3D_FEATURE_LEVEL_10_0,
  62     D3D_FEATURE_LEVEL_9_3,
  63     D3D_FEATURE_LEVEL_9_2,
  64     D3D_FEATURE_LEVEL_9_1,
  65   };
  66
  67   mswr::ComPtr<ID3D11Device> device;
  68   mswr::ComPtr<ID3D11DeviceContext> context;
  69   CheckIfFailed(
  70       D3D11CreateDevice(
  71           nullptr,
  72           D3D_DRIVER_TYPE_HARDWARE,
  73           nullptr,
  74           creation_flags,
  75           feature_levels,
  76           ARRAYSIZE(feature_levels),
  77           D3D11_SDK_VERSION,
  78           &device,
  79           &feature_level_,
  80           &context));
  81   CheckIfFailed(device.As(&d3d_device_));
  82   CheckIfFailed(context.As(&d3d_context_));
  83 }
  84
  85 void Direct3DHelper::CreateWindowSizeDependentResources() {
  86   CheckIfFailed(window_->get_Bounds(&window_bounds_));
  87   float window_width = ConvertDipsToPixels(window_bounds_.Width);
  88   float window_height = ConvertDipsToPixels(window_bounds_.Height);
  89
  90   // TODO(scottmg): Orientation.
  91
  92   if (swap_chain_ != nullptr) {
  93     // TODO(scottmg): Resize if it already exists.
  94     NOTIMPLEMENTED();
  95   } else {
  96     DXGI_SWAP_CHAIN_DESC1 swap_chain_desc = { 0 };
  97     swap_chain_desc.Width = window_width;
  98     swap_chain_desc.Height = window_height;
  99     swap_chain_desc.Format = DXGI_FORMAT_B8G8R8A8_UNORM;
 100     swap_chain_desc.Stereo = false;
 101     swap_chain_desc.SampleDesc.Count = 1;
 102     swap_chain_desc.SampleDesc.Quality = 0;
 103     swap_chain_desc.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
 104     swap_chain_desc.BufferCount = 2; // TODO(scottmg): Probably 1 is fine.
 105     swap_chain_desc.Scaling = DXGI_SCALING_NONE;
 106     swap_chain_desc.SwapEffect = DXGI_SWAP_EFFECT_FLIP_SEQUENTIAL;
 107     swap_chain_desc.Flags = 0;
 108
 109     mswr::ComPtr<IDXGIDevice1> dxgi_device;
 110     CheckIfFailed(d3d_device_.As(&dxgi_device));
 111
 112     mswr::ComPtr<IDXGIAdapter> dxgi_adapter;
 113     CheckIfFailed(dxgi_device->GetAdapter(&dxgi_adapter));
 114
 115     mswr::ComPtr<IDXGIFactory2> dxgi_factory;
 116     CheckIfFailed(dxgi_adapter->GetParent(
 117         __uuidof(IDXGIFactory2), &dxgi_factory));
 118
 119     CheckIfFailed(dxgi_factory->CreateSwapChainForCoreWindow(
 120         d3d_device_.Get(),
 121         reinterpret_cast<IUnknown*>(window_),
 122         &swap_chain_desc,
 123         nullptr,
 124         &swap_chain_));
 125   }
 126 }
 127
 128 }  // namespace metro_driver