新增全局application对象

core/application/application.cpp

@@ -8,6 +8,12 @@
 #include "spdlog/sinks/basic_file_sink.h"
 #include "spdlog/sinks/rotating_file_sink.h"
 
+application* g_application = nullptr;
+
+application::application() {
+    g_application = this;
+}
+
 void application::init(const char* runtime_dir) {
     try {
         auto max_size = 1048576 * 10; // 10MB

core/application/application.h

@@ -9,9 +9,11 @@ class render_target;
 class texture;
 class application;
 
+extern application* g_application;
+
 class CORE_API application {
 public:
-    application() = default;
+    application();
     virtual ~application() = default;
 
     application(const application&) = delete;