Fix main loop, add example and cleanup

src/main.cc

@@ -1,67 +1,19 @@
-#include "window/window.h"
+#include "app/app.h"
+
+using namespace app;
 
 int main() {
-  printf("Starting engine...\n");
+  int loading_image = window.load_image("assets/images/menu_bg.png", 1.0f, true);
 
-  Window w({800, 600}, "Render Test");
+  Animation loading_animation = {
+    .frames = {loading_image},
+    .frame_rate = 1.0f, // Not animated, so frame rate doesn't matter
+    .loop = false
+  };
 
-  int img = w.load_image("./assets/images/arrow.png", true);
-  int font = w.load_font(
-    "./assets/fonts/charybdis.ttf",
-    24,
-    false,
-    false,
-    false,
-    true
-  );
+  App app({720, 480}, "Mysth Engine", loading_animation);
 
-  int text = w.create_text(font, "Hello Engine", 12, {255, 255, 255, 255});
-
-  float t = 0.0f;
-
-  bool running = true;
-
-  printf("Entering main loop...\n");
-
-  while (running) {
-    Event e;
-    while (w.poll(e)) {
-      switch (e.type) {
-      case Event::QUIT:
-        printf("Exiting\n");
-        running = false;
-        break;
-      case Event::KEY_DOWN:
-        printf("Key down: %d\n", e.key.key);
-        if (e.key.key == 41) {
-          printf("Exiting\n");
-          running = false;
-        }
-        break;
-      default:
-        break;
-      }
-      w.consume(e);
-    }
-
-    w.clear();
-
-    // animated position
-    t += 0.016f;
-    float x = 200 + std::sin(t) * 100;
-    float y = 150 + std::cos(t) * 100;
-
-    // background rect (low z)
-    w.draw_rect({{0, 0}, {800, 600}}, {20, 20, 30, 255}, 0, 20.0f);
-
-    // image (mid z)
-    w.draw(img, {x, y}, 1.0f, t * 50.0f, {2.0f, 2.0f}, 1.0f);
-
-    // text (top z)
-    w.write(text, {0, 0}, 2.0f, 0.0f, {1.0f, 1.0f});
-
-    w.render();
-  }
+  app.loop();
 
   return 0;
 }