ShootingGame/SampleOverlay.cpp

   1 //// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
   2 //// ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
   3 //// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
   4 //// PARTICULAR PURPOSE.
   5 ////
   6 //// Copyright (c) Microsoft Corporation. All rights reserved
   7
   8 #include "pch.h"
   9 #include "SampleOverlay.h"
  10
  11 using namespace Windows::UI::Core;
  12 using namespace Windows::Foundation;
  13 using namespace Microsoft::WRL;
  14 using namespace Windows::UI::ViewManagement;
  15 using namespace Windows::Graphics::Display;
  16 using namespace D2D1;
  17
  18 SampleOverlay::SampleOverlay() :
  19     m_drawOverlay(true)
  20 {
  21 }
  22
  23 void SampleOverlay::Initialize(
  24     _In_ ID2D1Device*         d2dDevice,
  25     _In_ ID2D1DeviceContext*  d2dContext,
  26     _In_ IWICImagingFactory*  wicFactory,
  27     _In_ IDWriteFactory*      dwriteFactory,
  28     _In_ Platform::String^    caption
  29     )
  30 {
  31     m_wicFactory = wicFactory;
  32     m_dwriteFactory = dwriteFactory;
  33     m_sampleName = caption;
  34     m_d2dDevice = d2dDevice;
  35     m_d2dContext = d2dContext;
  36     m_padding = 3.0f;
  37     m_textVerticalOffset = 5.0f;
  38     m_logoSize = D2D1::SizeF(0.0f, 0.0f);
  39     m_overlayWidth = 0.0f;
  40
  41     ComPtr<ID2D1Factory> factory;
  42     d2dDevice->GetFactory(&factory);
  43
  44     DX::ThrowIfFailed(
  45         factory.As(&m_d2dFactory)
  46         );
  47
  48     ResetDirectXResources();
  49 }
  50
  51 void SampleOverlay::ResetDirectXResources()
  52 {
  53     DX::ThrowIfFailed(
  54         m_d2dContext->CreateSolidColorBrush(ColorF(ColorF::White), &m_whiteBrush)
  55         );
  56
  57     ComPtr<IWICBitmapDecoder> wicBitmapDecoder;
  58     DX::ThrowIfFailed(
  59         m_wicFactory->CreateDecoderFromFilename(
  60             L"windowsbig-sdk.png",
  61             nullptr,
  62             GENERIC_READ,
  63             WICDecodeMetadataCacheOnDemand,
  64             &wicBitmapDecoder
  65             )
  66         );
  67
  68     ComPtr<IWICBitmapFrameDecode> wicBitmapFrame;
  69     DX::ThrowIfFailed(
  70         wicBitmapDecoder->GetFrame(0, &wicBitmapFrame)
  71         );
  72
  73     ComPtr<IWICFormatConverter> wicFormatConverter;
  74     DX::ThrowIfFailed(
  75         m_wicFactory->CreateFormatConverter(&wicFormatConverter)
  76         );
  77
  78     DX::ThrowIfFailed(
  79         wicFormatConverter->Initialize(
  80             wicBitmapFrame.Get(),
  81             GUID_WICPixelFormat32bppPBGRA,
  82             WICBitmapDitherTypeNone,
  83             nullptr,
  84             0.0,
  85             WICBitmapPaletteTypeCustom  // the BGRA format has no palette so this value is ignored
  86             )
  87         );
  88
  89     double dpiX = 96.0f;
  90     double dpiY = 96.0f;
  91     DX::ThrowIfFailed(
  92         wicFormatConverter->GetResolution(&dpiX, &dpiY)
  93         );
  94
  95     DX::ThrowIfFailed(
  96         m_d2dContext->CreateBitmapFromWicBitmap(
  97             wicFormatConverter.Get(),
  98             BitmapProperties(
  99                 PixelFormat(DXGI_FORMAT_B8G8R8A8_UNORM, D2D1_ALPHA_MODE_PREMULTIPLIED),
 100                 static_cast<float>(dpiX),
 101                 static_cast<float>(dpiY)
 102                 ),
 103             &m_logoBitmap
 104             )
 105         );
 106
 107     m_logoSize = m_logoBitmap->GetSize();
 108
 109     ComPtr<IDWriteTextFormat> nameTextFormat;
 110     DX::ThrowIfFailed(
 111         m_dwriteFactory->CreateTextFormat(
 112             L"Segoe UI",
 113             nullptr,
 114             DWRITE_FONT_WEIGHT_LIGHT,
 115             DWRITE_FONT_STYLE_NORMAL,
 116             DWRITE_FONT_STRETCH_NORMAL,
 117             36.0f,
 118             L"en-US",
 119             &nameTextFormat
 120             )
 121         );
 122
 123     DX::ThrowIfFailed(
 124         nameTextFormat->SetTextAlignment(DWRITE_TEXT_ALIGNMENT_LEADING)
 125         );
 126
 127     DX::ThrowIfFailed(
 128         nameTextFormat->SetParagraphAlignment(DWRITE_PARAGRAPH_ALIGNMENT_NEAR)
 129         );
 130
 131     DX::ThrowIfFailed(
 132         m_dwriteFactory->CreateTextLayout(
 133             m_sampleName->Data(),
 134             m_sampleName->Length(),
 135             nameTextFormat.Get(),
 136             4096.0f,
 137             4096.0f,
 138             &m_textLayout
 139             )
 140         );
 141
 142     DWRITE_TEXT_METRICS metrics = {0};
 143     DX::ThrowIfFailed(
 144         m_textLayout->GetMetrics(&metrics)
 145         );
 146
 147     m_overlayWidth = m_padding * 3.0f + m_logoSize.width + metrics.width;
 148
 149     DX::ThrowIfFailed(
 150         m_d2dFactory->CreateDrawingStateBlock(&m_stateBlock)
 151         );
 152
 153     UpdateForWindowSizeChange();
 154 }
 155
 156 void SampleOverlay::UpdateForWindowSizeChange()
 157 {
 158     if (CoreWindow::GetForCurrentThread()->Bounds.Width < m_overlayWidth)
 159     {
 160         m_drawOverlay = false;
 161     }
 162     else
 163     {
 164         m_drawOverlay = true;
 165     }
 166 }
 167
 168 void SampleOverlay::Render()
 169 {
 170     if (m_drawOverlay)
 171     {
 172         m_d2dContext->SaveDrawingState(m_stateBlock.Get());
 173
 174         m_d2dContext->BeginDraw();
 175         m_d2dContext->SetTransform(D2D1::Matrix3x2F::Identity());
 176         m_d2dContext->DrawBitmap(
 177             m_logoBitmap.Get(),
 178             D2D1::RectF(m_padding, 0.0f, m_logoSize.width + m_padding, m_logoSize.height)
 179             );
 180
 181         m_d2dContext->DrawTextLayout(
 182             Point2F(m_logoSize.width + 2.0f * m_padding, m_textVerticalOffset),
 183             m_textLayout.Get(),
 184             m_whiteBrush.Get()
 185             );
 186
 187         // We ignore the HRESULT returned as we want to application to handle the
 188         // error when it uses Direct2D next.
 189         m_d2dContext->EndDraw();
 190
 191         m_d2dContext->RestoreDrawingState(m_stateBlock.Get());
 192     }
 193 }
 194
 195 float SampleOverlay::GetTitleHeightInDips()
 196 {
 197     return m_logoSize.height;
 198 }