Refractor headers and split code into program files for app & localization files.

Split keybinds from window.h file. General cleanup

src/app/app.cc

@@ -0,0 +1,111 @@
+#include "app/app.h"
+
+namespace app {
+void App::exit() {
+  running = false;
+}
+
+void App::switch_to_scene(uint64_t scene_id) {
+  scene_pool.release(current_scene_id);
+  scene_pool.use(scene_id);
+  current_scene_id = scene_id;
+}
+
+App::App(Vec2<float> size, const char *title) {
+  window.update(size, title);
+  Scene *loading_scene = new Scene{};
+  current_scene_id = scene_pool.acquire(loading_scene);
+}
+
+void App::set_fps(float fps) {
+  this->fps = fps;
+  target_frame_time = 1e9 / fps;
+}
+
+uint64_t App::get_fps() const {
+  return fps;
+}
+
+void App::loop() {
+  uint64_t frame_start = window.get_time();
+  uint64_t frame_end = window.get_time();
+  uint64_t previous_frame_end = 0;
+
+  while (running) {
+    frame_start = window.get_time();
+    uint64_t frame_time = frame_start - frame_end;
+
+    if (frame_time <= target_frame_time) {
+      struct timespec req;
+      req.tv_sec = 0;
+      req.tv_nsec = target_frame_time - frame_time;
+      nanosleep(&req, nullptr);
+    }
+
+    previous_frame_end = frame_end;
+    frame_end = window.get_time();
+
+    float dt = frame_end - previous_frame_end;
+
+    Scene *scene = scene_pool[current_scene_id];
+
+    pressed_keys.clear();
+    released_keys.clear();
+    scroll = {0, 0};
+    text = "";
+
+    Event e;
+    while (window.poll(e)) {
+      switch (e.type) {
+      case Event::QUIT:
+        running = false;
+        break;
+      case Event::MOUSE_BUTTON_DOWN:
+        scene->click(e.mouse_button.position);
+        down_keys[e.mouse_button.button] = true;
+        pressed_keys.push_back(e.mouse_button.button);
+        break;
+      case Event::MOUSE_BUTTON_UP:
+        down_keys[e.mouse_button.button] = false;
+        released_keys.push_back(e.mouse_button.button);
+        break;
+      case Event::MOUSE_MOVE:
+        mouse_position = e.mouse_move.position;
+        break;
+      case Event::MOUSE_LEAVE:
+        mouse_position = {-1, -1};
+        break;
+      case Event::KEY_DOWN:
+        down_keys[e.key.key] = true;
+        pressed_keys.push_back(e.key.key);
+        break;
+      case Event::KEY_UP:
+        down_keys[e.key.key] = false;
+        released_keys.push_back(e.key.key);
+        break;
+      case Event::SCROLL:
+        scroll = e.scroll;
+        break;
+      case Event::TEXT_INPUT:
+        text += *e.text_input;
+        delete e.text_input;
+        break;
+      default:
+        break;
+      }
+    }
+
+    int ai = mrb_gc_arena_save(Ruby::mrb);
+    mrb_value dt_val = mrb_float_value(Ruby::mrb, dt / 1e9);
+    update.call(1, &dt_val);
+    scene->update_scene(dt_val);
+    mrb_gc_arena_restore(Ruby::mrb, ai);
+
+    scene->render(window.get_time());
+
+    window.render();
+
+    window.clear();
+  }
+}
+} // namespace app