Main.cpp

//--------------------------------------------------------------------------------------
// File: Main.cpp
//
// Copyright (c) Microsoft Corporation.
// Licensed under the MIT License.
//--------------------------------------------------------------------------------------

#include "pch.h"
#include "Game.h"

#if defined(_XBOX_ONE) && defined(_TITLE)
#include <ppltasks.h>

using namespace concurrency;
using namespace Windows::ApplicationModel;
using namespace Windows::ApplicationModel::Core;
using namespace Windows::ApplicationModel::Activation;
using namespace Windows::UI::Core;
using namespace Windows::Foundation;

bool g_HDRMode = false;
#else
#include <commdlg.h>
#endif

using namespace DirectX;

#if defined(_XBOX_ONE) && defined(_TITLE)

ref class ViewProvider sealed : public IFrameworkView
{
public:
    ViewProvider() :
        m_exit(false)
    {
    }

    // IFrameworkView methods
    virtual void Initialize(CoreApplicationView^ applicationView)
    {
        applicationView->Activated +=
            ref new TypedEventHandler<CoreApplicationView^, IActivatedEventArgs^>(this, &ViewProvider::OnActivated);

        CoreApplication::Suspending +=
            ref new EventHandler<SuspendingEventArgs^>(this, &ViewProvider::OnSuspending);

        CoreApplication::Resuming +=
            ref new EventHandler<Platform::Object^>(this, &ViewProvider::OnResuming);

        m_game = std::make_unique<Game>();

        if (m_game->RequestHDRMode())
        {
            // Request HDR mode.
            auto determineHDR = Concurrency::create_task(
                Windows::Xbox::Graphics::Display::DisplayConfiguration::TrySetHdrModeAsync()
            );

            // In a real game, you'd do some initialization here to hide the HDR mode switch.

            // Finish up HDR mode detection (waiting for async if needed)
            g_HDRMode = determineHDR.get()->HdrEnabled;

#ifdef _DEBUG
            OutputDebugStringA((g_HDRMode) ? "INFO: Display in HDR Mode\n" : "INFO: Display in SDR Mode\n");
#endif
        }
    }

    virtual void Uninitialize()
    {
        m_game.reset();
    }

    virtual void SetWindow(CoreWindow^ window)
    {
        window->Closed +=
            ref new TypedEventHandler<CoreWindow^, CoreWindowEventArgs^>(this, &ViewProvider::OnWindowClosed);

        m_game->Initialize(reinterpret_cast<IUnknown*>(reinterpret_cast<IUnknown*>(window)));
    }

    virtual void Load(Platform::String^ entryPoint)
    {
    }

    virtual void Run()
    {
        while (!m_exit)
        {
            m_game->Tick();

            CoreWindow::GetForCurrentThread()->Dispatcher->ProcessEvents(CoreProcessEventsOption::ProcessAllIfPresent);
        }
    }

protected:
    // Event handlers
    void OnActivated(CoreApplicationView^ applicationView, IActivatedEventArgs^ args)
    {
        CoreWindow::GetForCurrentThread()->Activate();
    }

    void OnSuspending(Platform::Object^ sender, SuspendingEventArgs^ args)
    {
        auto deferral = args->SuspendingOperation->GetDeferral();

        create_task([this, deferral]()
        {
            m_game->OnSuspending();

            deferral->Complete();
        });
    }

    void OnResuming(Platform::Object^ sender, Platform::Object^ args)
    {
        m_game->OnResuming();
    }

    void OnWindowClosed(CoreWindow^ sender, CoreWindowEventArgs^ args)
    {
        m_exit = true;
    }

private:
    bool                    m_exit;
    std::unique_ptr<Game>   m_game;
};

ref class ViewProviderFactory : IFrameworkViewSource
{
public:
    virtual IFrameworkView^ CreateView()
    {
        return ref new ViewProvider();
    }
};


// Entry point
[Platform::MTAThread]
int __cdecl main(Platform::Array<Platform::String^>^ /*argv*/)
{
    auto viewProviderFactory = ref new ViewProviderFactory();
    CoreApplication::Run(viewProviderFactory);
    return 0;
}

// Exit helper
void ExitGame() noexcept
{
    Windows::ApplicationModel::Core::CoreApplication::Exit();
}
#else

namespace
{
    std::unique_ptr<Game> g_game;
}

LPCWSTR g_szAppName = L"DirectXTKModelViewer (DirectX 11)";

LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
void ExitGame() noexcept;

// Indicates to hybrid graphics systems to prefer the discrete part by default
extern "C"
{
    __declspec(dllexport) DWORD NvOptimusEnablement = 0x00000001;
    __declspec(dllexport) int AmdPowerXpressRequestHighPerformance = 1;
}

// Entry point
int WINAPI wWinMain(_In_ HINSTANCE hInstance, _In_opt_ HINSTANCE hPrevInstance, _In_ LPWSTR lpCmdLine, _In_ int nCmdShow)
{
    UNREFERENCED_PARAMETER(hPrevInstance);
    UNREFERENCED_PARAMETER(lpCmdLine);

    if (!XMVerifyCPUSupport())
        return 1;

    HRESULT hr = CoInitializeEx(nullptr, COINITBASE_MULTITHREADED);
    if (FAILED(hr))
        return 1;

    g_game = std::make_unique<Game>();

    // Register class and create window
    {
        // Register class
        WNDCLASSEXW wcex = {};
        wcex.cbSize = sizeof(WNDCLASSEXW);
        wcex.style = CS_HREDRAW | CS_VREDRAW;
        wcex.lpfnWndProc = WndProc;
        wcex.hInstance = hInstance;
        wcex.hIcon = LoadIconW(hInstance, L"IDI_ICON");
        wcex.hCursor = LoadCursorW(nullptr, IDC_ARROW);
        wcex.hbrBackground = reinterpret_cast<HBRUSH>(COLOR_WINDOW + 1);
        wcex.lpszClassName = L"DirectXTKModelViewerWindowClass";
        wcex.hIconSm = LoadIconW(wcex.hInstance, L"IDI_ICON");
        if (!RegisterClassExW(&wcex))
            return 1;

        // Create window
        int w, h;
        g_game->GetDefaultSize(w, h);

        RECT rc = { 0, 0, static_cast<LONG>(w), static_cast<LONG>(h) };

        AdjustWindowRect(&rc, WS_OVERLAPPEDWINDOW, FALSE);

        HWND hwnd = CreateWindowExW(0, L"DirectXTKModelViewerWindowClass", g_szAppName, WS_OVERLAPPEDWINDOW,
            CW_USEDEFAULT, CW_USEDEFAULT, rc.right - rc.left, rc.bottom - rc.top,
            nullptr, nullptr, hInstance,
            g_game.get());
        if (!hwnd)
            return 1;

        ShowWindow(hwnd, nCmdShow);

        GetClientRect(hwnd, &rc);

        g_game->Initialize(hwnd, rc.right - rc.left, rc.bottom - rc.top);
    }

    // Main message loop
    MSG msg = {};
    while (WM_QUIT != msg.message)
    {
        if (PeekMessage(&msg, nullptr, 0, 0, PM_REMOVE))
        {
            TranslateMessage(&msg);
            DispatchMessage(&msg);
        }
        else
        {
            g_game->Tick();
        }
    }

    g_game.reset();

    CoUninitialize();

    return static_cast<int>(msg.wParam);
}

// Windows procedure
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    static bool s_in_sizemove = false;
    static bool s_in_suspend = false;
    static bool s_minimized = false;
    static bool s_fullscreen = false;

    auto game = reinterpret_cast<Game*>(GetWindowLongPtr(hWnd, GWLP_USERDATA));

    switch (message)
    {
    case WM_CREATE:
        if (lParam)
        {
            auto params = reinterpret_cast<LPCREATESTRUCTW>(lParam);
            SetWindowLongPtr(hWnd, GWLP_USERDATA, reinterpret_cast<LONG_PTR>(params->lpCreateParams));
        }
        break;

    case WM_PAINT:
        if (s_in_sizemove && game)
        {
            game->Tick();
        }
        else
        {
            PAINTSTRUCT ps;
            std::ignore = BeginPaint(hWnd, &ps);
            EndPaint(hWnd, &ps);
        }
        break;

    case WM_DISPLAYCHANGE:
        if (game)
        {
            game->OnDisplayChange();
        }
        break;

    case WM_MOVE:
        if (game)
        {
            game->OnWindowMoved();
        }
        break;

    case WM_SIZE:
        if (wParam == SIZE_MINIMIZED)
        {
            if (!s_minimized)
            {
                s_minimized = true;
                if (!s_in_suspend && game)
                    game->OnSuspending();
                s_in_suspend = true;
            }
        }
        else if (s_minimized)
        {
            s_minimized = false;
            if (s_in_suspend && game)
                game->OnResuming();
            s_in_suspend = false;
        }
        else if (!s_in_sizemove && game)
        {
            game->OnWindowSizeChanged(LOWORD(lParam), HIWORD(lParam));
        }
        break;

    case WM_ENTERSIZEMOVE:
        s_in_sizemove = true;
        break;

    case WM_EXITSIZEMOVE:
        s_in_sizemove = false;
        if (game)
        {
            RECT rc;
            GetClientRect(hWnd, &rc);

            game->OnWindowSizeChanged(rc.right - rc.left, rc.bottom - rc.top);
        }
        break;

    case WM_GETMINMAXINFO:
        if (lParam)
        {
            auto info = reinterpret_cast<MINMAXINFO*>(lParam);
            info->ptMinTrackSize.x = 320;
            info->ptMinTrackSize.y = 200;
        }
        break;

    case WM_ACTIVATEAPP:
        Keyboard::ProcessMessage(message, wParam, lParam);
        Mouse::ProcessMessage(message, wParam, lParam);

        if (game)
        {
            if (wParam)
            {
                game->OnActivated();
            }
            else
            {
                game->OnDeactivated();
            }
        }
        break;

    case WM_POWERBROADCAST:
        switch (wParam)
        {
        case PBT_APMQUERYSUSPEND:
            if (!s_in_suspend && game)
                game->OnSuspending();
            s_in_suspend = true;
            return TRUE;

        case PBT_APMRESUMESUSPEND:
            if (!s_minimized)
            {
                if (s_in_suspend && game)
                    game->OnResuming();
                s_in_suspend = false;
            }
            return TRUE;
        }
        break;

    case WM_DESTROY:
        PostQuitMessage(0);
        break;

    case WM_SYSKEYDOWN:
        Keyboard::ProcessMessage(message, wParam, lParam);
        if (wParam == VK_RETURN && (lParam & 0x60000000) == 0x20000000)
        {
            // Implements the classic ALT+ENTER fullscreen toggle
            if (s_fullscreen)
            {
                SetWindowLongPtr(hWnd, GWL_STYLE, WS_OVERLAPPEDWINDOW);
                SetWindowLongPtr(hWnd, GWL_EXSTYLE, 0);

                int width = 800;
                int height = 600;
                if (game)
                    game->GetDefaultSize(width, height);

                ShowWindow(hWnd, SW_SHOWNORMAL);

                SetWindowPos(hWnd, HWND_TOP, 0, 0, width, height, SWP_NOMOVE | SWP_NOZORDER | SWP_FRAMECHANGED);
            }
            else
            {
                SetWindowLongPtr(hWnd, GWL_STYLE, WS_POPUP);
                SetWindowLongPtr(hWnd, GWL_EXSTYLE, WS_EX_TOPMOST);

                SetWindowPos(hWnd, HWND_TOP, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER | SWP_FRAMECHANGED);

                ShowWindow(hWnd, SW_SHOWMAXIMIZED);
            }

            s_fullscreen = !s_fullscreen;
        }
        break;

    case WM_KEYDOWN:
    case WM_KEYUP:
    case WM_SYSKEYUP:
        Keyboard::ProcessMessage(message, wParam, lParam);
        break;

    case WM_INPUT:
    case WM_MOUSEMOVE:
    case WM_LBUTTONDOWN:
    case WM_LBUTTONUP:
    case WM_RBUTTONDOWN:
    case WM_RBUTTONUP:
    case WM_MBUTTONDOWN:
    case WM_MBUTTONUP:
    case WM_MOUSEWHEEL:
    case WM_XBUTTONDOWN:
    case WM_XBUTTONUP:
    case WM_MOUSEHOVER:
        Mouse::ProcessMessage(message, wParam, lParam);
        break;

    case WM_MENUCHAR:
        // A menu is active and the user presses a key that does not correspond
        // to any mnemonic or accelerator key. Ignore so we don't produce an error beep.
        return MAKELRESULT(0, MNC_CLOSE);

    case WM_USER:
        if (game)
        {
            static DWORD s_filterIndex = 1;

            WCHAR szFile[MAX_PATH] = {};
            OPENFILENAME ofn = {};
            ofn.lStructSize = sizeof(OPENFILENAME);
            ofn.lpstrFile = szFile;
            ofn.lpstrFile[0] = 0;
            ofn.nMaxFile = MAX_PATH;
            ofn.lpstrFilter = L"DirectX SDK Mesh (SDKMESH)\0*.sdkmesh\0Visual Studio Mesh (CMO)\0*.cmo\0Vertex Buffer Object (VBO)\0*.vbo\0All Files\0*.*\0";
            ofn.nFilterIndex = s_filterIndex;
            ofn.Flags = OFN_PATHMUSTEXIST | OFN_FILEMUSTEXIST;
            if (GetOpenFileName(&ofn))
            {
                s_filterIndex = ofn.nFilterIndex;
                game->OnFileOpen(szFile);
            }
        }
        break;
    }

    return DefWindowProc(hWnd, message, wParam, lParam);
}

// Exit helper
void ExitGame() noexcept
{
    PostQuitMessage(0);
}
#endif