boo/lib/win/UWPCommon.hpp

#pragma once

#include "WinCommon.hpp"

struct Boo3DAppContextUWP : Boo3DAppContext {
  bool isFullscreen(const boo::IWindow* window) {
#if _WIN32_WINNT_WIN10
    if (m_ctx12.m_dev) {
      D3D12Context::Window& win = m_ctx12.m_windows[window];
      BOOL isFScr;
      win.m_swapChain->GetFullscreenState(&isFScr, nullptr);
      return isFScr != 0;
    }
#endif
    if (m_ctx11.m_dev) {
      D3D11Context::Window& win = m_ctx11.m_windows[window];
      BOOL isFScr;
      win.m_swapChain->GetFullscreenState(&isFScr, nullptr);
      return isFScr != 0;
    }
    return false;
  }

  bool setFullscreen(boo::IWindow* window, bool fs) {
#if _WIN32_WINNT_WIN10
    if (m_ctx12.m_dev) {
      D3D12Context::Window& win = m_ctx12.m_windows[window];
      BOOL isFScr;
      win.m_swapChain->GetFullscreenState(&isFScr, nullptr);
      if (fs && isFScr)
        return false;
      else if (!fs && !isFScr)
        return false;

      if (fs) {
        ComPtr<IDXGIOutput> out;
        win.m_swapChain->GetContainingOutput(&out);
        DXGI_OUTPUT_DESC outDesc;
        out->GetDesc(&outDesc);

        win.m_swapChain->SetFullscreenState(true, nullptr);
        DXGI_MODE_DESC mdesc = {UINT(outDesc.DesktopCoordinates.right - outDesc.DesktopCoordinates.left),
                                UINT(outDesc.DesktopCoordinates.bottom - outDesc.DesktopCoordinates.top)};
        win.m_swapChain->ResizeTarget(&mdesc);
      } else
        win.m_swapChain->SetFullscreenState(false, nullptr);
      return true;
    }
#endif
    if (m_ctx11.m_dev) {
      D3D11Context::Window& win = m_ctx11.m_windows[window];
      BOOL isFScr;
      win.m_swapChain->GetFullscreenState(&isFScr, nullptr);
      if (fs && isFScr)
        return false;
      else if (!fs && !isFScr)
        return false;

      if (fs) {
        ComPtr<IDXGIOutput> out;
        win.m_swapChain->GetContainingOutput(&out);
        DXGI_OUTPUT_DESC outDesc;
        out->GetDesc(&outDesc);

        win.m_fsdesc.Width = outDesc.DesktopCoordinates.right;
        win.m_fsdesc.Height = outDesc.DesktopCoordinates.bottom;
      }
      win.m_fs = fs;
      win.m_needsFSTransition = true;
      return true;
    }
    return false;
  }
};