From 511acfe82d8c45aba4280b41f205d921e3ea71bc Mon Sep 17 00:00:00 2001
From: Joshua Peisach <itzswirlz2020@outlook.com>
Date: Sun, 29 Jun 2025 11:41:54 -0400
Subject: [PATCH] 3ds: implement apt hooks

---
 CMakeLists.txt        |  1 +
 ISLE/3ds/apthooks.cpp | 24 ++++++++++++++++++++++++
 ISLE/3ds/apthooks.h   |  8 ++++++++
 ISLE/isleapp.cpp      |  8 ++++++++
 ISLE/isleapp.h        |  1 +
 5 files changed, 42 insertions(+)
 create mode 100644 ISLE/3ds/apthooks.cpp
 create mode 100644 ISLE/3ds/apthooks.h

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7fbdc80d..f5f4c965 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -647,6 +647,7 @@ set(CPACK_PACKAGE_DIRECTORY "dist")
 set(CPACK_PACKAGE_FILE_NAME "isle-${PROJECT_VERSION}-${ISLE_PACKAGE_NAME}-${CMAKE_SYSTEM_PROCESSOR}")
 if(NINTENDO_3DS)
   target_sources(isle PRIVATE
+    ISLE/3ds/apthooks.cpp
     ISLE/3ds/filesystem.cpp
   )
   ctr_generate_smdh(isle.smdh
diff --git a/ISLE/3ds/apthooks.cpp b/ISLE/3ds/apthooks.cpp
new file mode 100644
index 00000000..68fa6bba
--- /dev/null
+++ b/ISLE/3ds/apthooks.cpp
@@ -0,0 +1,24 @@
+#include "apthooks.h"
+
+#include "../isleapp.h"
+#include "legomain.h"
+#include "misc.h"
+
+void N3DS_AptHookCallback(APT_HookType hookType, void* param)
+{
+	switch (hookType) {
+	case APTHOOK_ONSLEEP:
+	case APTHOOK_ONSUSPEND:
+		Lego()->Pause();
+		break;
+	case APTHOOK_ONWAKEUP:
+	case APTHOOK_ONRESTORE:
+		Lego()->Resume();
+		break;
+	case APTHOOK_ONEXIT:
+		Lego()->CloseMainWindow();
+		break;
+	default:
+		break;
+	}
+}
diff --git a/ISLE/3ds/apthooks.h b/ISLE/3ds/apthooks.h
new file mode 100644
index 00000000..66aeacfb
--- /dev/null
+++ b/ISLE/3ds/apthooks.h
@@ -0,0 +1,8 @@
+#ifndef N3DS_APTHOOKS_H
+#define N3DS_APTHOOKS_H
+
+#include <3ds.h>
+
+void N3DS_AptHookCallback(APT_HookType hookType, void* param);
+
+#endif // N3DS_APTHOOKS_H
diff --git a/ISLE/isleapp.cpp b/ISLE/isleapp.cpp
index a460c899..acb6b40b 100644
--- a/ISLE/isleapp.cpp
+++ b/ISLE/isleapp.cpp
@@ -51,7 +51,10 @@
 #endif
 
 #ifdef __3DS__
+#include "3ds/apthooks.h"
 #include "3ds/filesystem.h"
+
+aptHookCookie g_aptCookie;
 #endif
 
 DECOMP_SIZE_ASSERT(IsleApp, 0x8c)
@@ -318,6 +321,11 @@ SDL_AppResult SDL_AppInit(void** appstate, int argc, char** argv)
 		NULL
 	);
 #endif
+
+#ifdef __3DS__
+	aptHook(&g_aptCookie, N3DS_AptHookCallback, NULL);
+#endif
+
 	return SDL_APP_CONTINUE;
 }
 
diff --git a/ISLE/isleapp.h b/ISLE/isleapp.h
index dd7bfdb1..d0a7f523 100644
--- a/ISLE/isleapp.h
+++ b/ISLE/isleapp.h
@@ -96,6 +96,7 @@ class IsleApp {
 };
 
 extern IsleApp* g_isle;
+extern MxS32 g_closed;
 
 extern IDirect3DRMMiniwinDevice* GetD3DRMMiniwinDevice();