diff --git a/src/Engine/Application.cpp b/src/Engine/Application.cpp
index 9811deba5f..df23397103 100644
--- a/src/Engine/Application.cpp
+++ b/src/Engine/Application.cpp
@@ -798,8 +798,9 @@ namespace Mengine
 
         m_currentWindowResolution = windowResolution;
 
+        float renderViewportAspect;
         Viewport renderViewport;
-        this->calcRenderViewport_( &renderViewport );
+        this->calcRenderViewport_( &renderViewportAspect, &renderViewport );
 
         LOGGER_INFO( "system", "set render viewport [%f %f - %f %f]"
             , renderViewport.begin.x
@@ -2050,7 +2051,7 @@ namespace Mengine
         return m_currentWindowResolution;
     }
     //////////////////////////////////////////////////////////////////////////
-    void Application::calcRenderViewport_( Viewport * const _viewport )
+    void Application::calcRenderViewport_( float * const _aspect, Viewport * const _viewport ) const
     {
         float windowWidth = m_currentWindowResolution.getWidthF();
         float windowHeight = m_currentWindowResolution.getHeightF();
@@ -2060,6 +2061,8 @@ namespace Mengine
 
         if( fixedDisplayResolution == false )
         {
+            *_aspect = windowAspect;
+
             _viewport->begin.x = 0.f;
             _viewport->begin.y = 0.f;
             _viewport->end.x = windowWidth;
@@ -2076,21 +2079,20 @@ namespace Mengine
             bestAspect = contentAspect;
         }
 
-        float oneDivWidth = 1.f / windowWidth;
-        float oneDivHeight = 1.f / windowHeight;
-
         float dw = 1.f;
-        float dh = windowWidth / bestAspect * oneDivHeight;
+        float dh = windowAspect / bestAspect;
 
         if( dh > 1.f )
         {
-            dw = windowHeight * bestAspect * oneDivWidth;
+            dw = bestAspect / windowAspect;
             dh = 1.f;
         }
 
         float areaWidth = MENGINE_CEILF( dw * windowWidth );
         float areaHeight = MENGINE_CEILF( dh * windowHeight );
 
+        *_aspect = bestAspect;
+
         _viewport->begin.x = MENGINE_CEILF( (windowWidth - areaWidth) * 0.5f );
         _viewport->begin.y = MENGINE_CEILF( (windowHeight - areaHeight) * 0.5f );
         _viewport->end.x = _viewport->begin.x + areaWidth;
@@ -2193,8 +2195,9 @@ namespace Mengine
             return;
         }
 
+        float renderViewportAspect;
         Viewport renderViewport;
-        this->calcRenderViewport_( &renderViewport );
+        this->calcRenderViewport_( &renderViewportAspect, &renderViewport );
 
         LOGGER_INFO( "system", "set render viewport [%f %f - %f %f]"
             , renderViewport.begin.x
@@ -2445,15 +2448,12 @@ namespace Mengine
             return;
         }
 
-        float oneDivWidth = 1.f / contentWidth;
-        float oneDivHeight = 1.f / contentHeight;
-
         float dw = 1.f;
-        float dh = contentWidth / windowAspect * oneDivHeight;
+        float dh = contentAspect / windowAspect;
 
         if( dh < 1.f )
         {
-            dw = contentHeight * windowAspect * oneDivWidth;
+            dw = windowAspect / contentAspect;
             dh = 1.f;
         }
 
@@ -2468,6 +2468,31 @@ namespace Mengine
         _viewport->end.y = _viewport->begin.y + areaHeight;
     }
     //////////////////////////////////////////////////////////////////////////
+    EContenEdgeMode Application::getAspectRatioContenEdgeMode() const
+    {
+        if( m_fixedContentResolution == false )
+        {
+            return ECEM_NONE;
+        }
+
+        if( m_fixedViewportResolution == true )
+        {
+            return ECEM_NONE;
+        }
+
+        float contentAspect = m_contentResolution.getAspectRatio();
+        float windowAspect = m_currentWindowResolution.getAspectRatio();
+
+        float dh = contentAspect / windowAspect;
+
+        if( dh < 1.f )
+        {
+            return ECEM_HORIZONTAL_CONTENT_EDGE;
+        }
+
+        return ECEM_VERTICAL_CONTENT_EDGE;
+    }
+    //////////////////////////////////////////////////////////////////////////
     bool Application::getAllowFullscreenSwitchShortcut() const
     {
         return false;
diff --git a/src/Engine/Application.h b/src/Engine/Application.h
index a586f302c0..6af67186a3 100644
--- a/src/Engine/Application.h
+++ b/src/Engine/Application.h
@@ -87,8 +87,10 @@ namespace Mengine
 
         void getGameViewport( float * const _aspect, Viewport * const _viewport ) const override;
 
+        EContenEdgeMode getAspectRatioContenEdgeMode() const override;
+
     protected:
-        void calcRenderViewport_( Viewport * const _viewport );
+        void calcRenderViewport_( float * const _aspect, Viewport * const _viewport ) const;
 
     public:
         bool render() override;
diff --git a/src/Frameworks/PythonFramework/EngineScriptEmbedding.cpp b/src/Frameworks/PythonFramework/EngineScriptEmbedding.cpp
index 4407cba435..e0db8de446 100644
--- a/src/Frameworks/PythonFramework/EngineScriptEmbedding.cpp
+++ b/src/Frameworks/PythonFramework/EngineScriptEmbedding.cpp
@@ -4021,6 +4021,14 @@ namespace Mengine
                 return viewport;
             }
             //////////////////////////////////////////////////////////////////////////
+            EContenEdgeMode s_getAspectRatioContenEdgeMode()
+            {
+                EContenEdgeMode mode = APPLICATION_SERVICE()
+                    ->getAspectRatioContenEdgeMode();
+
+                return mode;
+            }
+            //////////////////////////////////////////////////////////////////////////
             bool s_hasGameParam( const ConstString & _paramName )
             {
                 const ConfigInterfacePtr & config = CONFIG_SERVICE()
@@ -4445,6 +4453,14 @@ namespace Mengine
         pybind::def_functor( _kernel, "getGameAspect", nodeScriptMethod, &EngineScriptMethod::s_getGameAspect );
         pybind::def_functor( _kernel, "getGameViewport", nodeScriptMethod, &EngineScriptMethod::s_getGameViewport );
 
+        pybind::enum_<EContenEdgeMode>( _kernel, "EContenEdgeMode" )
+            .def( "ECEM_NONE", ECEM_NONE )
+            .def( "ECEM_HORIZONTAL_CONTENT_EDGE", ECEM_HORIZONTAL_CONTENT_EDGE )
+            .def( "ECEM_VERTICAL_CONTENT_EDGE", ECEM_VERTICAL_CONTENT_EDGE )
+            ;
+
+        pybind::def_functor( _kernel, "getAspectRatioContenEdgeMode", nodeScriptMethod, &EngineScriptMethod::s_getAspectRatioContenEdgeMode );
+
         pybind::def_functor( _kernel, "hasGameParam", nodeScriptMethod, &EngineScriptMethod::s_hasGameParam );
         pybind::def_functor_kernel( _kernel, "getGameParamString", nodeScriptMethod, &EngineScriptMethod::s_getGameParamString );
         pybind::def_functor_kernel( _kernel, "getGameParamUnicode", nodeScriptMethod, &EngineScriptMethod::s_getGameParamUnicode );
diff --git a/src/Interface/ApplicationInterface.h b/src/Interface/ApplicationInterface.h
index c1734bd08c..edeae8b5b8 100644
--- a/src/Interface/ApplicationInterface.h
+++ b/src/Interface/ApplicationInterface.h
@@ -24,6 +24,13 @@
 
 namespace Mengine
 {
+    //////////////////////////////////////////////////////////////////////////
+    enum EContenEdgeMode
+    {
+        ECEM_NONE,
+        ECEM_HORIZONTAL_CONTENT_EDGE,
+        ECEM_VERTICAL_CONTENT_EDGE
+    };
     //////////////////////////////////////////////////////////////////////////
     class ApplicationInterface
         : public ServiceInterface
@@ -96,6 +103,8 @@ namespace Mengine
         virtual const Resolution & getContentResolution() const = 0;
         virtual void getGameViewport( float * const _aspect, Viewport * const _viewport ) const = 0;
 
+        virtual EContenEdgeMode getAspectRatioContenEdgeMode() const = 0;
+
     public:
         virtual bool createRenderWindow() = 0;