diff --git a/source/jdraw.cpp b/source/jdraw.cpp
index 8b03888..9a281a6 100644
--- a/source/jdraw.cpp
+++ b/source/jdraw.cpp
@@ -187,6 +187,16 @@ namespace draw
         viewport.h = destination->h;
     }
 
+    const int getLocalX(const int x)
+    {
+        return x - viewport.x;
+    }
+
+    const int getLocalY(const int y)
+    {
+        return y - viewport.y;
+    }
+
     // Estableix la paleta del sistema carregant-la d'un GIF
     void loadPalette(const std::string &filename)
     {
diff --git a/source/jdraw.h b/source/jdraw.h
index 6ad7d91..69ab532 100644
--- a/source/jdraw.h
+++ b/source/jdraw.h
@@ -61,6 +61,9 @@ namespace draw
     void setViewport(const int x, const int y, const int w, const int h);
     void resetViewport();
 
+    const int getLocalX(const int x);
+    const int getLocalY(const int y);
+
     /// @brief Estableix la paleta del sistema carregant-la d'un GIF
     /// @param filename nom de l'arxiu GIF d'on carregar la paleta
     void loadPalette(const std::string &filename);