Implement SDL platform, windowing and input handling

Source/Engine/Platform/Windows/WindowsFileSystem.cpp

@@ -2,6 +2,7 @@
 
 #if PLATFORM_WINDOWS
 
+#include "WindowsWindow.h"
 #include "WindowsFileSystem.h"
 #include "Engine/Platform/File.h"
 #include "Engine/Platform/Window.h"
@@ -317,7 +318,7 @@ bool WindowsFileSystem::ShowBrowseFolderDialog(Window* parentWindow, const Strin
         if (SUCCEEDED(SHCreateItemFromParsingName(initialDirectory.Get(), NULL, IID_PPV_ARGS(&defaultFolder))))
             fd->SetFolder(defaultFolder);
 
-        HWND hwndOwner = parentWindow ? parentWindow->GetHWND() : NULL;
+        HWND hwndOwner = parentWindow ? (HWND)parentWindow->GetNativePtr() : NULL;
         if (SUCCEEDED(fd->Show(hwndOwner)))
         {
             ComPtr<IShellItem> si;

Source/Engine/Platform/Windows/WindowsInput.cpp

@@ -1,6 +1,6 @@
 // Copyright (c) 2012-2024 Wojciech Figat. All rights reserved.
 
-#if PLATFORM_WINDOWS
+#if PLATFORM_WINDOWS && !PLATFORM_SDL
 
 #include "WindowsInput.h"
 #include "WindowsWindow.h"

Source/Engine/Platform/Windows/WindowsPlatform.cpp

@@ -4,6 +4,8 @@
 
 #include "Engine/Platform/Platform.h"
 #include "Engine/Platform/Window.h"
+#include "Engine/Platform/Windows/WindowsInput.h"
+#include "Engine/Platform/Windows/WindowsWindow.h"
 #include "Engine/Platform/FileSystem.h"
 #include "Engine/Platform/CreateWindowSettings.h"
 #include "Engine/Platform/CreateProcessSettings.h"
@@ -255,6 +257,8 @@ void GetWindowsVersion(String& windowsName, int32& versionMajor, int32& versionM
     RegCloseKey(hKey);
 }
 
+#if !PLATFORM_SDL
+
 LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
 {
     // Find window to process that message
@@ -272,6 +276,8 @@ LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
     return DefWindowProc(hwnd, msg, wParam, lParam);
 }
 
+#endif
+
 long __stdcall WindowsPlatform::SehExceptionHandler(EXCEPTION_POINTERS* ep)
 {
     if (ep->ExceptionRecord->ExceptionCode == CLR_EXCEPTION)
@@ -518,6 +524,7 @@ void WindowsPlatform::PreInit(void* hInstance)
     // Disable the process from being showing "ghosted" while not responding messages during slow tasks
     DisableProcessWindowsGhosting();
 
+#if !PLATFORM_SDL
     // Register window class
     WNDCLASS windowsClass;
     Platform::MemoryClear(&windowsClass, sizeof(WNDCLASS));
@@ -532,6 +539,7 @@ void WindowsPlatform::PreInit(void* hInstance)
         Error(TEXT("Window class registration failed!"));
         exit(-1);
     }
+#endif
 
     // Init OLE
     if (OleInitialize(nullptr) != S_OK)
@@ -680,7 +688,9 @@ bool WindowsPlatform::Init()
     }
     OnPlatformUserAdd(New<User>(userName));
 
+#if !PLATFORM_SDL
     WindowsInput::Init();
+#endif
 
     return false;
 }
@@ -708,7 +718,9 @@ void WindowsPlatform::LogInfo()
 
 void WindowsPlatform::Tick()
 {
+#if !PLATFORM_SDL
     WindowsInput::Update();
+#endif
 
     // Check to see if any messages are waiting in the queue
     MSG msg;
@@ -739,8 +751,10 @@ void WindowsPlatform::Exit()
     DbgHelpUnlock();
 #endif
 
+#if !PLATFORM_SDL
     // Unregister app class
     UnregisterClassW(ApplicationClassName, nullptr);
+#endif
 
     Win32Platform::Exit();
 }
@@ -1185,11 +1199,15 @@ int32 WindowsPlatform::CreateProcess(CreateProcessSettings& settings)
     return result;
 }
 
+#if !PLATFORM_SDL
+
 Window* WindowsPlatform::CreateWindow(const CreateWindowSettings& settings)
 {
     return New<WindowsWindow>(settings);
 }
 
+#endif
+
 void* WindowsPlatform::LoadLibrary(const Char* filename)
 {
     ASSERT(filename);

Source/Engine/Platform/Windows/WindowsWindow.DragDrop.cpp

@@ -2,6 +2,10 @@
 
 #if PLATFORM_WINDOWS
 
+#if PLATFORM_SDL
+#include "Engine/Platform/SDL/SDLWindow.h"
+#endif
+
 #include "Engine/Platform/Windows/WindowsWindow.h"
 
 #if USE_EDITOR
@@ -596,7 +600,11 @@ DragDropEffect Window::DoDragDrop(const StringView& data)
     {
         ::POINT point;
         ::GetCursorPos(&point);
+#if PLATFORM_SDL
+        Input::Mouse->OnMouseUp(Float2((float)point.x, (float)point.y), MouseButton::Left, (Window*)this);
+#else
         Input::Mouse->OnMouseUp(Float2((float)point.x, (float)point.y), MouseButton::Left, this);
+#endif
     }
 
     return SUCCEEDED(result) ? dropEffectFromOleEnum(dwEffect) : DragDropEffect::None;

Source/Engine/Platform/Windows/WindowsWindow.cpp

@@ -1,6 +1,6 @@
 // Copyright (c) 2012-2024 Wojciech Figat. All rights reserved.
 
-#if PLATFORM_WINDOWS
+#if PLATFORM_WINDOWS && !PLATFORM_SDL
 
 #include "WindowsWindow.h"
 #include "WindowsPlatform.h"
@@ -1308,7 +1308,7 @@ LRESULT WindowsWindow::WndProc(UINT msg, WPARAM wParam, LPARAM lParam)
 
     if (_settings.AllowInput)
     {
-        if (WindowsInput::WndProc(this, msg, wParam, lParam))
+        if (WindowsInput::WndProc((Window*)this, msg, wParam, lParam))
             return true;
     }
 

Source/Engine/Platform/Windows/WindowsWindow.h

@@ -2,7 +2,7 @@
 
 #pragma once
 
-#if PLATFORM_WINDOWS
+#if PLATFORM_WINDOWS && !PLATFORM_SDL
 
 #include "Engine/Platform/Base/WindowBase.h"
 #include "Engine/Platform/Platform.h"
@@ -136,7 +136,7 @@ public:
     Windows::ULONG __stdcall AddRef() override;
     Windows::ULONG __stdcall Release() override;
 
-    // [IDropTarget]
+    // [Windows::IDropTarget]
     Windows::HRESULT __stdcall DragEnter(Windows::IDataObject* pDataObj, Windows::DWORD grfKeyState, Windows::POINTL pt, Windows::DWORD* pdwEffect) override;
     Windows::HRESULT __stdcall DragOver(Windows::DWORD grfKeyState, Windows::POINTL pt, Windows::DWORD* pdwEffect) override;
     Windows::HRESULT __stdcall DragLeave() override;