Platform/PlatformApplication: adding create() method.

engine.build.lua

@@ -52,6 +52,7 @@ local system_module = Module("source/System", {
 })
 
 local platform_common_module = Module("source/Platform", {
+	"PlatformApplication.cpp",
 	"PlatformDisplay.cpp"
 })
 

source/Platform/PlatformApplication.cpp

@@ -0,0 +1,21 @@
+
+#include "PlatformApplication.h"
+
+#ifdef _WIN32
+#include <Platform/Win32/Win32Application.h>
+typedef sp::Win32Application ApplicationType;
+#elif defined(__linux__) || defined(unix) || defined(__unix) || defined(__unix__)
+#include <Platform/Unix/UnixApplication.h>
+typedef sp::UnixApplication ApplicationType;
+#else
+#error "No Application implementation exists"
+#endif
+
+namespace sp {
+
+PlatformApplication* PlatformApplication::create()
+{
+	return new ApplicationType;
+}
+
+} // namespace sp

source/Platform/PlatformApplication.h

@@ -11,6 +11,8 @@ class MessageQueue;
 class PlatformApplication
 {
 public :
+	static PlatformApplication* create();
+
 	virtual void init() = 0;
 
 	virtual void shutdown() = 0;