Moved Native App from master repository

1 files changed, 168 insertions, 0 deletions

diff --git a/NativeApp/src/Win32/WinMain.cpp b/NativeApp/src/Win32/WinMain.cpp
new file mode 100644
index 0000000..8f63460
--- /dev/null
+++ b/NativeApp/src/Win32/WinMain.cpp
@@ -0,0 +1,168 @@
+/*     Copyright 2019 Diligent Graphics LLC
+ *  
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF ANY PROPRIETARY RIGHTS.
+ *
+ *  In no event and under no legal theory, whether in tort (including negligence), 
+ *  contract, or otherwise, unless required by applicable law (such as deliberate 
+ *  and grossly negligent acts) or agreed to in writing, shall any Contributor be
+ *  liable for any damages, including any direct, indirect, special, incidental, 
+ *  or consequential damages of any character arising as a result of this License or 
+ *  out of the use or inability to use the software (including but not limited to damages 
+ *  for loss of goodwill, work stoppage, computer failure or malfunction, or any and 
+ *  all other commercial damages or losses), even if such Contributor has been advised 
+ *  of the possibility of such damages.
+ */
+
+#include <memory>
+#include <iomanip>
+#include <Windows.h>
+#include <crtdbg.h>
+#include "NativeAppBase.h"
+#include "StringTools.h"
+#include "Timer.h"
+
+using namespace Diligent;
+
+std::unique_ptr<NativeAppBase> g_pTheApp;
+
+LRESULT CALLBACK MessageProc(HWND, UINT, WPARAM, LPARAM);
+// Main
+int WINAPI WinMain(HINSTANCE instance, HINSTANCE, LPSTR, int cmdShow)
+{
+#if defined(_DEBUG) || defined(DEBUG)
+    _CrtSetDbgFlag( _CRTDBG_ALLOC_MEM_DF | _CRTDBG_LEAK_CHECK_DF );
+#endif
+
+    g_pTheApp.reset( CreateApplication() );
+
+    const auto* cmdLine = GetCommandLineA();
+    g_pTheApp->ProcessCommandLine(cmdLine);
+
+    const auto* AppTitle = g_pTheApp->GetAppTitle();
+
+#ifdef UNICODE
+    const auto* const WindowClassName =   L"SampleApp";
+#else
+    const auto* const WindowClassName =   "SampleApp";
+#endif
+
+    // Register our window class
+    WNDCLASSEX wcex = { sizeof(WNDCLASSEX), CS_HREDRAW|CS_VREDRAW, MessageProc,
+                        0L, 0L, instance, NULL, NULL, NULL, NULL, WindowClassName, NULL };
+    RegisterClassEx(&wcex);
+
+    int DesiredWidth = 0;
+    int DesiredHeight = 0;
+    g_pTheApp->GetDesiredInitialWindowSize(DesiredWidth, DesiredHeight);
+    // Create a window
+    LONG WindowWidth  = DesiredWidth  > 0 ? DesiredWidth  : 1280;
+    LONG WindowHeight = DesiredHeight > 0 ? DesiredHeight : 1024;
+    RECT rc = { 0, 0, WindowWidth, WindowHeight };
+    AdjustWindowRect(&rc, WS_OVERLAPPEDWINDOW, FALSE);
+    HWND wnd = CreateWindowA("SampleApp", AppTitle,
+                            WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, 
+                            rc.right-rc.left, rc.bottom-rc.top, NULL, NULL, instance, NULL);
+    if (!wnd)
+    {
+        MessageBoxA(NULL, "Cannot create window", "Error", MB_OK|MB_ICONERROR);
+        return 0;
+    }
+    ShowWindow(wnd, cmdShow);
+    UpdateWindow(wnd);
+    
+    g_pTheApp->OnWindowCreated(wnd, WindowWidth, WindowHeight);
+    AppTitle = g_pTheApp->GetAppTitle();
+
+    Diligent::Timer Timer;
+    auto PrevTime = Timer.GetElapsedTime();
+    double filteredFrameTime = 0.0;
+
+    // Main message loop
+    MSG msg = {0};
+    while (WM_QUIT != msg.message)
+    {
+        if (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
+        {
+            TranslateMessage(&msg);
+            DispatchMessage(&msg);
+        }
+        else
+        {
+            auto CurrTime = Timer.GetElapsedTime();
+            auto ElapsedTime = CurrTime - PrevTime;
+            PrevTime = CurrTime;
+            g_pTheApp->Update(CurrTime, ElapsedTime);
+
+            g_pTheApp->Render();
+
+            g_pTheApp->Present();
+
+            double filterScale = 0.2;
+            filteredFrameTime = filteredFrameTime * (1.0 - filterScale) + filterScale * ElapsedTime;
+            std::stringstream fpsCounterSS;
+            fpsCounterSS << AppTitle << " - " << std::fixed << std::setprecision(1) << filteredFrameTime * 1000;
+            fpsCounterSS << " ms (" << 1.0 / filteredFrameTime << " fps)";
+            SetWindowTextA(wnd, fpsCounterSS.str().c_str());
+        }
+    }
+    
+    g_pTheApp.reset();
+
+    return (int)msg.wParam;
+}
+
+// Called every time the NativeNativeAppBase receives a message
+LRESULT CALLBACK MessageProc(HWND wnd, UINT message, WPARAM wParam, LPARAM lParam)
+{
+    if(g_pTheApp)
+    {
+        auto res = g_pTheApp->HandleWin32Message(wnd, message, wParam, lParam);
+        if (res != 0)
+            return res;
+    }
+
+    switch (message) 
+    {
+        case WM_PAINT:
+            {
+                PAINTSTRUCT ps;
+                BeginPaint(wnd, &ps);
+                EndPaint(wnd, &ps);
+                return 0;
+            }
+        case WM_SIZE: // Window size has been changed
+            if( g_pTheApp )
+            {
+                g_pTheApp->WindowResize(LOWORD(lParam), HIWORD(lParam));
+            }
+            return 0;
+
+        case WM_CHAR:
+            if (wParam == VK_ESCAPE)
+                PostQuitMessage(0);
+            return 0;
+
+        case WM_DESTROY:
+            PostQuitMessage(0);
+            return 0;
+
+        case WM_GETMINMAXINFO:
+        {
+            LPMINMAXINFO lpMMI = (LPMINMAXINFO)lParam;
+            lpMMI->ptMinTrackSize.x = 320;
+            lpMMI->ptMinTrackSize.y = 240;
+            return 0;
+        }
+
+        default:
+            return DefWindowProc(wnd, message, wParam, lParam);
+    }
+}