add geode::cocos::reloadTextures utility

bindings/GeometryDash.bro

@@ -67,7 +67,9 @@ class AppDelegate : cocos2d::CCApplication {
     virtual void applicationWillResignActive() = mac 0x3aab50, win 0x3cf20;
     virtual void trySaveGame() = mac 0x3aaf10, win 0x3d5e0, ios 0x1a28f0;
     virtual void willSwitchToScene(cocos2d::CCScene*) = mac 0x3aaf40, win 0x3d690;
-    static AppDelegate* get() = mac 0x3aab10;
+    static AppDelegate* get() {
+        return static_cast<AppDelegate*>(cocos2d::CCApplication::sharedApplication());
+    }
     bool musicTest() = win 0x3d580;
     void pauseGame() = mac 0x3aab60, win 0x3d3e0;
     void resumeSound() = win 0x3d4d0;

loader/include/Geode/utils/cocos.hpp

@@ -131,6 +131,17 @@ namespace geode::cocos {
      */
     GEODE_DLL cocos2d::CCScene* switchToScene(cocos2d::CCLayer* layer);
 
+    using CreateLayerFunc = cocos2d::CCLayer*(*)();
+
+    /**
+     * Reload textures, overwriting the scene to return to after the loading 
+     * screen is finished
+     * @param returnTo A function that returns a new layer. After loading is 
+     * finished, the game switches to the given layer instead of MenuLayer. 
+     * Leave nullptr to enable default behaviour
+     */
+    GEODE_DLL void reloadTextures(CreateLayerFunc returnTo = nullptr);
+
     /**
      * Rescale node to fit inside given size
      * @param node Node to rescale

loader/src/utils/cocos.cpp

@@ -1,6 +1,7 @@
 #include <Geode/utils/cocos.hpp>
 #include <Geode/utils/operators.hpp>
 #include <Geode/utils/WackyGeodeMacros.hpp>
+#include <Geode/modify/LoadingLayer.hpp>
 
 USE_GEODE_NAMESPACE();
 
@@ -108,3 +109,31 @@ CCScene* geode::cocos::switchToScene(CCLayer* layer) {
     ));
     return scene;
 }
+
+static CreateLayerFunc LOADING_FINISHED_SCENE = nullptr;
+
+void geode::cocos::reloadTextures(CreateLayerFunc returnTo) {
+    LOADING_FINISHED_SCENE = returnTo;
+    GameManager::get()->reloadAll(false, false, true);
+}
+
+class $modify(LoadingLayer) {
+    void loadingFinished() {
+        // Default behaviour
+        if (!LOADING_FINISHED_SCENE) {
+            return LoadingLayer::loadingFinished();
+        }
+        // Create custom layer
+        auto layer = LOADING_FINISHED_SCENE();
+        // If failed, default behaviour
+        if (!layer) {
+            return LoadingLayer::loadingFinished();
+        }
+        auto scene = CCScene::create();
+        scene->addChild(layer);
+        AppDelegate::get()->m_runningScene = scene;
+        CCDirector::get()->replaceScene(scene);
+        // Don't overwrite behaviour next time
+        LOADING_FINISHED_SCENE = nullptr;
+    }
+};