1 files changed, 47 insertions, 0 deletions

diff --git a/contrib/SDL-3.2.8/src/main/emscripten/SDL_sysmain_callbacks.c b/contrib/SDL-3.2.8/src/main/emscripten/SDL_sysmain_callbacks.c
new file mode 100644
index 0000000..d3b2f95
--- /dev/null
+++ b/contrib/SDL-3.2.8/src/main/emscripten/SDL_sysmain_callbacks.c
@@ -0,0 +1,47 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2025 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+#include "SDL_internal.h"
+#include "../SDL_main_callbacks.h"
+
+#include <emscripten.h>
+
+static void EmscriptenInternalMainloop(void)
+{
+    const SDL_AppResult rc = SDL_IterateMainCallbacks(true);
+    if (rc != SDL_APP_CONTINUE) {
+        SDL_QuitMainCallbacks(rc);
+        emscripten_cancel_main_loop();  // kill" the mainloop, so it stops calling back into it.
+        exit((rc == SDL_APP_FAILURE) ? 1 : 0);  // hopefully this takes down everything else, too.
+    }
+}
+
+int SDL_EnterAppMainCallbacks(int argc, char* argv[], SDL_AppInit_func appinit, SDL_AppIterate_func appiter, SDL_AppEvent_func appevent, SDL_AppQuit_func appquit)
+{
+    const SDL_AppResult rc = SDL_InitMainCallbacks(argc, argv, appinit, appiter, appevent, appquit);
+    if (rc == SDL_APP_CONTINUE) {
+        emscripten_set_main_loop(EmscriptenInternalMainloop, 0, 0);  // run at refresh rate, don't throw an exception since we do an orderly return.
+    } else {
+        SDL_QuitMainCallbacks(rc);
+    }
+    return (rc == SDL_APP_FAILURE) ? 1 : 0;
+}
+