Initial support for building and running SDL platform on macOS

Source/Engine/Platform/Mac/MacPlatform.cpp

@@ -423,11 +423,15 @@ String MacPlatform::GetMainDirectory()
     return path;
 }
 
+#if !PLATFORM_SDL
+
 Window* MacPlatform::CreateWindow(const CreateWindowSettings& settings)
 {
     return New<MacWindow>(settings);
 }
 
+#endif
+
 int32 MacPlatform::CreateProcess(CreateProcessSettings& settings)
 {
     LOG(Info, "Command: {0} {1}", settings.FileName, settings.Arguments);

Source/Engine/Platform/Mac/MacWindow.cpp

@@ -1,6 +1,6 @@
 // Copyright (c) Wojciech Figat. All rights reserved.
 
-#if PLATFORM_MAC
+#if PLATFORM_MAC && !PLATFORM_SDL
 
 #include "../Window.h"
 #include "Engine/Platform/Apple/AppleUtils.h"

Source/Engine/Platform/SDL/SDLPlatform.Mac.cpp

@@ -2,11 +2,81 @@
 
 #if PLATFORM_SDL && PLATFORM_MAC
 
-static_assert(false, "TODO");
+#include "SDLWindow.h"
+#include "Engine/Core/Log.h"
+#include "Engine/Core/Collections/Array.h"
+#include "Engine/Engine/CommandLine.h"
+#include "Engine/Engine/Engine.h"
+#include "Engine/Engine/Time.h"
+#include "Engine/Graphics/RenderTask.h"
+#include "Engine/Input/Input.h"
+#include "Engine/Input/Mouse.h"
+#include "Engine/Platform/IGuiData.h"
+#include "Engine/Platform/MessageBox.h"
+#include "Engine/Platform/Platform.h"
+#include "Engine/Platform/WindowsManager.h"
+#include "Engine/Platform/Base/DragDropHelper.h"
+#include "Engine/Platform/SDL/SDLClipboard.h"
+#include "Engine/Platform/Unix/UnixFile.h"
+#include "Engine/Profiler/ProfilerCPU.h"
+
+#include "Engine/Platform/Linux/IncludeX11.h"
+
+#include <SDL3/SDL_events.h>
+#include <SDL3/SDL_hints.h>
+#include <SDL3/SDL_messagebox.h>
+#include <SDL3/SDL_mouse.h>
+#include <SDL3/SDL_system.h>
+#include <SDL3/SDL_timer.h>
+#include <SDL3/SDL_video.h>
+
+bool SDLPlatform::InitInternal()
+{
+    return false;
+}
+
+bool SDLPlatform::UsesWindows()
+{
+    return false;
+}
+
+bool SDLPlatform::UsesWayland()
+{
+    return false;
+}
+
+bool SDLPlatform::UsesX11()
+{
+    return false;
+}
+
+void SDLPlatform::PreHandleEvents()
+{
+}
+
+void SDLPlatform::PostHandleEvents()
+{
+}
+
+bool SDLWindow::HandleEventInternal(SDL_Event& event)
+{
+    return false;
+}
 
 void SDLPlatform::SetHighDpiAwarenessEnabled(bool enable)
 {
     // TODO: This is now called before Platform::Init, ensure the scaling is changed accordingly during Platform::Init (see ApplePlatform::SetHighDpiAwarenessEnabled)
 }
 
+DragDropEffect SDLWindow::DoDragDrop(const StringView& data)
+{
+    return DragDropEffect::None;
+}
+
+DragDropEffect SDLWindow::DoDragDrop(const StringView& data, const Float2& offset, Window* dragSourceWindow)
+{
+    Show();
+    return DragDropEffect::None;
+}
+
 #endif

Source/Engine/Platform/SDL/SDLPlatform.h

@@ -11,7 +11,10 @@ typedef struct tagMSG MSG;
 #elif PLATFORM_LINUX
 #include "Engine/Platform/Linux/LinuxPlatform.h"
 union _XEvent;
+#elif PLATFORM_MAC
+#include "Engine/Platform/Mac/MacPlatform.h"
 #else
+static_assert(false, "Unsupported Platform");
 #endif
 
 class SDLWindow;
@@ -29,8 +32,13 @@ class FLAXENGINE_API SDLPlatform
     : public LinuxPlatform
 {
     using base = LinuxPlatform;
+#elif PLATFORM_MAC
+: public MacPlatform
+{
+    using base = MacPlatform;
 #else
 {
+    static_assert(false, "Unsupported Platform");
 #endif
     friend SDLWindow;
 

Source/Engine/Platform/SDL/SDLWindow.cpp

@@ -30,6 +30,10 @@
 #endif
 #elif PLATFORM_LINUX
 #include "Engine/Platform/Linux/IncludeX11.h"
+#elif PLATFORM_MAC
+
+#else
+static_assert(false, "Unsupported Platform");
 #endif
 
 #define DefaultDPI 96

Source/Engine/Platform/Types.h

@@ -265,10 +265,12 @@ class AppleThread;
 typedef AppleThread Thread;
 class MacClipboard;
 typedef MacClipboard Clipboard;
+#if !PLATFORM_SDL
 class MacPlatform;
 typedef MacPlatform Platform;
 class MacWindow;
 typedef MacWindow Window;
+#endif
 class UnixNetwork;
 typedef UnixNetwork Network;
 class UserBase;