Añadida la unidad service.h

source/service.cpp

@@ -0,0 +1,29 @@
+#include "service.h"
+
+int checkServiceButton(Input *input)
+{
+    if (input->checkInput(input_service))
+    {
+        if (input->checkInput(input_start))
+        {
+            return SERVICE_EXIT;
+        }
+
+        else if (input->checkInput(input_fire_left))
+        {
+            return SERVICE_CONFIG;
+        }
+
+        else if (input->checkInput(input_fire_center))
+        {
+            return SERVICE_SHADERS;
+        }
+
+        else if (input->checkInput(input_fire_right))
+        {
+            return SERVICE_PAUSE;
+        }
+    }
+
+    return SERVICE_NULL;
+}

source/service.h

@@ -0,0 +1,15 @@
+#pragma once
+
+#include <SDL2/SDL.h>
+#include "common/utils.h"
+#include "common/input.h"
+#include "const.h"
+
+#define SERVICE_NULL 0
+#define SERVICE_EXIT 1
+#define SERVICE_CONFIG 2
+#define SERVICE_SHADERS 3
+#define SERVICE_PAUSE 4
+
+// Comprueba el botón de servicio
+int checkServiceButton(Input *input);