From 2d0c02ae7e8470e9af5124e1c1e526fd23c181f9 Mon Sep 17 00:00:00 2001
From: Daemo <97889325+DaemonicGh@users.noreply.github.com>
Date: Fri, 7 Aug 2026 00:18:52 +0200
Subject: [PATCH] Fix freeze when resizing a window (#239)

Fixed an annoying bug where the application would freeze when resizing
the window
This pull request made it so the SDL window's resizing event now
broadcasts a new event specifically asking the swapchain to recreate
itself, which will in turn broadcast the original event when done. It
also removed the Event enum specific values, as they were irrelevant.
---
 runtime/Includes/Core/Enums.h          | 7 ++++---
 runtime/Sources/Platform/Inputs.cpp    | 6 +++---
 runtime/Sources/Renderer/Swapchain.cpp | 4 ++--
 3 files changed, 9 insertions(+), 8 deletions(-)

diff --git a/runtime/Includes/Core/Enums.h b/runtime/Includes/Core/Enums.h
index ef15390..4934b1a 100644
--- a/runtime/Includes/Core/Enums.h
+++ b/runtime/Includes/Core/Enums.h
@@ -19,9 +19,10 @@ namespace mlx
 
 	enum class Event
 	{
-		ResizeEventCode = 56,
-		FrameBeginEventCode = 57,
-		FatalErrorEventCode = 168,
+		ResizeEventCode = 1,
+		SwapchainResizeEventCode,
+		FrameBeginEventCode,
+		FatalErrorEventCode,
 
 		EndEnum
 	};
diff --git a/runtime/Sources/Platform/Inputs.cpp b/runtime/Sources/Platform/Inputs.cpp
index bf86a1c..f41c248 100644
--- a/runtime/Sources/Platform/Inputs.cpp
+++ b/runtime/Sources/Platform/Inputs.cpp
@@ -8,9 +8,9 @@ namespace mlx
 {
 	namespace Internal
 	{
-		struct ResizeEventBroadcast : public EventBase
+		struct SwapchainResizeEventBroadcast : public EventBase
 		{
-			Event What() const override { return Event::ResizeEventCode; }
+			Event What() const override { return Event::SwapchainResizeEventCode; }
 		};
 	}
 
@@ -23,7 +23,7 @@ namespace mlx
 			if(!m_events_hooks.contains(window_id) || m_events_hooks[window_id][event].empty())
 				return;
 			if(event == MLX_WINDOW_EVENT && code == 8)
-				EventBus::SendBroadcast(Internal::ResizeEventBroadcast{});
+				EventBus::SendBroadcast(Internal::SwapchainResizeEventBroadcast{});
 			for(const auto& hook : m_events_hooks[window_id][event])
 			{
 				if(hook.fn)
diff --git a/runtime/Sources/Renderer/Swapchain.cpp b/runtime/Sources/Renderer/Swapchain.cpp
index 9c08607..6b2cfe3 100644
--- a/runtime/Sources/Renderer/Swapchain.cpp
+++ b/runtime/Sources/Renderer/Swapchain.cpp
@@ -15,7 +15,7 @@ namespace mlx
 			Event What() const override { return Event::ResizeEventCode; }
 		};
 	}
-	
+
 	std::string VulkanFormatName(VkFormat format)
 	{
 		#define STRINGIFY(x) case x: return #x
@@ -161,7 +161,7 @@ namespace mlx
 
 		std::function<void(const EventBase&)> functor = [this](const EventBase& event)
 		{
-			if(event.What() == Event::ResizeEventCode && !m_resize)
+			if(event.What() == Event::SwapchainResizeEventCode && !m_resize)
 				m_resize = true;
 		};
 		EventBus::RegisterListener({ functor, "mlx_swapchain_" + std::to_string(reinterpret_cast<std::uintptr_t>(this)) });