scerne stuff

src/scene/CMakeLists.txt

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+# Copyright (c) 2025 Dominic Masters
+# 
+# This software is released under the MIT License.
+# https://opensource.org/licenses/MIT
+
+# Sources
+target_sources(${DUSK_TARGET_NAME}
+  PRIVATE
+    scenemanager.c
+)
+
+# Subdirs

src/scene/scene.h

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+/**
+ * Copyright (c) 2025 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#pragma once
+#include "dusk.h"
+#include "error/error.h"
+
+#define SCENE_FLAG_ACTIVE (1 << 0)
+
+typedef struct {
+  errorret_t (*init)(void);
+  void (*update)(void);
+  void (*render)(void);
+  void (*dispose)(void);
+  
+  void (*active)(void);
+  void (*sleep)(void);
+
+  uint8_t flags;
+} scene_t;

src/scene/scenemanager.c

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+/**
+ * Copyright (c) 2025 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "scenemanager.h"
+#include "util/memory.h"
+#include "assert/assert.h"
+
+scenemanager_t SCENE_MANAGER;
+
+errorret_t sceneManagerInit(void) {
+  memoryZero(&SCENE_MANAGER, sizeof(scenemanager_t));
+
+  errorOk();
+}
+
+void sceneManagerSetScene(scene_t *scene) {
+  if(SCENE_MANAGER.current) {
+    SCENE_MANAGER.current->sleep();
+    SCENE_MANAGER.current->flags &= ~SCENE_FLAG_ACTIVE;
+  }
+  
+  SCENE_MANAGER.current = scene;
+
+  if(SCENE_MANAGER.current) {
+    SCENE_MANAGER.current->active();
+    SCENE_MANAGER.current->flags |= SCENE_FLAG_ACTIVE;
+  }
+}
+
+void sceneManagerUpdate(void) {
+  if(!SCENE_MANAGER.current) return;
+  assertTrue(
+    SCENE_MANAGER.current->flags & SCENE_FLAG_ACTIVE,
+    "Current scene not active"
+  );
+  SCENE_MANAGER.current->update();
+}
+
+void sceneManagerRender(void) {
+  if(!SCENE_MANAGER.current) return;
+  assertTrue(
+    SCENE_MANAGER.current->flags & SCENE_FLAG_ACTIVE,
+    "Current scene not active"
+  );
+  SCENE_MANAGER.current->render();
+}
+
+void sceneManagerDispose(void) {
+  assertNull(SCENE_MANAGER.current, "Current scene not null");
+}

src/scene/scenemanager.h

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+/**
+ * Copyright (c) 2025 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#pragma once
+#include "scene.h"
+
+typedef struct {
+  scene_t *current;
+} scenemanager_t;
+
+extern scenemanager_t SCENE_MANAGER;
+
+/**
+ * Initializes the scene manager and the initial scene.
+ */
+errorret_t sceneManagerInit(void);
+
+/**
+ * Sets the current active scene.
+ * 
+ * @param scene The scene to set as current.
+ */
+void sceneManagerSetScene(scene_t *scene);
+
+/**
+ * Updates all active scenes.
+ */
+void sceneManagerUpdate(void);
+
+/**
+ * Renders all visible scenes.
+ */
+void sceneManagerRender(void);
+
+/**
+ * Disposes of all scenes.
+ */
+void sceneManagerDispose(void);