AppController class created to take the necessary app logic into C++.

xs/xsp/AppController.xsp

@@ -0,0 +1,20 @@
+%module{Slic3r::XS};
+
+%{
+#include <xsinit.h>
+#include "slic3r/AppController.hpp"
+#include "libslic3r/Model.hpp"
+#include "libslic3r/Print.hpp"
+%}
+
+%name{Slic3r::AppController} class AppController {
+
+    AppController();
+
+    void slice_to_png(); 
+
+    void set_model(Model *model);
+    void set_print(Print *print);
+    void set_global_progress_indicator_id(unsigned gauge_id, unsigned statusbar_id);
+
+};

xs/xsp/my.map

@@ -216,6 +216,7 @@ Ref<PrintObjectSupportMaterial>   O_OBJECT_SLIC3R_T
 Clone<PrintObjectSupportMaterial> O_OBJECT_SLIC3R_T
 
 AppConfig*	                O_OBJECT_SLIC3R
+AppController*                  O_OBJECT_SLIC3R
 Ref<AppConfig>         		O_OBJECT_SLIC3R_T
 
 GLShader*                  	O_OBJECT_SLIC3R

xs/xsp/typemap.xspt

@@ -268,3 +268,4 @@
     $CVar = (PrintObjectStep)SvUV($PerlVar);
   %};
 };
+%typemap{AppController*};