Scene stack logic

1 files changed, 39 insertions, 8 deletions

diff --git a/src/scenes/sceneManager.c b/src/scenes/sceneManager.c
index 4d42ed9..bb70864 100644
--- a/src/scenes/sceneManager.c
+++ b/src/scenes/sceneManager.c
@@ -1,14 +1,45 @@
 #include "scenes.h"
+#include <stdlib.h>
+#include <sys/types.h>
 
-void UpdateScene(enum SCENE scene) {
-    switch (scene) {
-        case MAIN_MENU: MainMenuUpdate();
-    }
+Scene **sceneStack = NULL;
+uint sceneStackDepth = 0;
+
+Scene *getCurrentScene() {
+    if (sceneStackDepth == 0) return false;
+    return sceneStack[sceneStackDepth - 1];
+}
+
+bool InitSceneStack() {
+    sceneStack = malloc(sizeof(Scene) * SCENE_STACK_SIZE);
+    return sceneStack != NULL;
+}
+
+bool AddScene(Scene *newScene) {
+    if (newScene == NULL || sceneStackDepth == SCENE_STACK_SIZE)
+        return false;
+
+    sceneStack[sceneStackDepth] = newScene;
+    sceneStackDepth += 1;
+
+    return true;
 }
 
-void DrawScene(enum SCENE scene) {
-    switch (scene) {
-        case MAIN_MENU: MainMenuDraw();
-    }
+void DeleteSceneFromStack() {
+    Scene *currentScene = getCurrentScene();
+    if (currentScene == NULL) return;
+    currentScene->Deint(currentScene);
+    sceneStack[--sceneStackDepth] = NULL;
 }
 
+bool DrawScene() {
+    Scene *currentScene = getCurrentScene();
+    if (currentScene == NULL) return false;
+    return currentScene->Draw(currentScene);
+}
+
+bool UpdateScene() {
+    Scene *currentScene = getCurrentScene();
+    if (currentScene == NULL) return false;
+    return currentScene->Update(currentScene);
+}