diff --git a/docs/changes.txt b/docs/changes.txt
index 3d18793491..297b4a2737 100644
--- a/docs/changes.txt
+++ b/docs/changes.txt
@@ -506,6 +506,7 @@ GTK:
 - Switch to GtkTooltip from deprecated GtkTooltips (Emilien Kia).
 - wxTLW generates wxEVT_MAXIMIZE.
 - Fix copying clipboard data to primary selection (David Hart).
+- Implement wxGraphicsContext::GetSize() (Marcin Wojdyr).
 
 MSW:
 
diff --git a/include/wx/graphics.h b/include/wx/graphics.h
index 4a2b42c974..98d8a376f3 100644
--- a/include/wx/graphics.h
+++ b/include/wx/graphics.h
@@ -503,7 +503,13 @@ public:
     virtual bool SetCompositionMode(wxCompositionMode op) = 0;
 
     // returns the size of the graphics context in device coordinates
-    virtual void GetSize( wxDouble* width, wxDouble* height);
+    void GetSize(wxDouble* width, wxDouble* height)
+    {
+        if ( width )
+            *width = m_width;
+        if ( height )
+            *height = m_height;
+    }
 
     // returns the resolution of the graphics context in device points per inch
     virtual void GetDPI( wxDouble* dpiX, wxDouble* dpiY);
@@ -638,6 +644,9 @@ public:
     virtual bool ShouldOffset() const { return false; }
 
 protected:
+    // These fields must be initialized in the derived class ctors.
+    wxDouble m_width,
+             m_height;
 
     wxGraphicsPen m_pen;
     wxGraphicsBrush m_brush;
diff --git a/src/common/graphcmn.cpp b/src/common/graphcmn.cpp
index 5bc8a8824a..1ba501788f 100644
--- a/src/common/graphcmn.cpp
+++ b/src/common/graphcmn.cpp
@@ -575,12 +575,6 @@ wxDouble wxGraphicsContext::GetAlpha() const
 }
 #endif
 
-void wxGraphicsContext::GetSize( wxDouble* width, wxDouble* height)
-{
-    *width = 10000.0;
-    *height = 10000.0;
-}
-
 void wxGraphicsContext::GetDPI( wxDouble* dpiX, wxDouble* dpiY)
 {
     *dpiX = 72.0;
diff --git a/src/generic/graphicc.cpp b/src/generic/graphicc.cpp
index 482befad69..942357e984 100644
--- a/src/generic/graphicc.cpp
+++ b/src/generic/graphicc.cpp
@@ -1189,6 +1189,10 @@ wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, const wxPrinterDC&
     const wxDCImpl *impl = dc.GetImpl();
     Init( (cairo_t*) impl->GetCairoContext() );
 
+    wxSize sz = dc.GetSize();
+    m_width = sz.x;
+    m_height = sz.y;
+
     wxPoint org = dc.GetDeviceOrigin();
     cairo_translate( m_context, org.x, org.y );
 
@@ -1204,6 +1208,11 @@ wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, const wxPrinterDC&
 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, const wxWindowDC& dc )
 : wxGraphicsContext(renderer)
 {
+    int width, height;
+    dc.GetSize( &width, &height );
+    m_width = width;
+    m_height = height;
+
 #ifdef __WXGTK20__
     wxGTKDCImpl *impldc = (wxGTKDCImpl*) dc.GetImpl();
     Init( gdk_cairo_create( impldc->GetGDKWindow() ) );
@@ -1226,8 +1235,6 @@ wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, const wxWindowDC&
 #endif
 
 #ifdef __WXMAC__
-    int width, height;
-    dc.GetSize( &width, &height );
     CGContextRef cgcontext = (CGContextRef)dc.GetWindow()->MacGetCGContextRef();
     cairo_surface_t* surface = cairo_quartz_surface_create_for_cg_context(cgcontext, width, height);
     Init( cairo_create( surface ) );
@@ -1238,6 +1245,11 @@ wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, const wxWindowDC&
 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, const wxMemoryDC& dc )
 : wxGraphicsContext(renderer)
 {
+    int width, height;
+    dc.GetSize( &width, &height );
+    m_width = width;
+    m_height = height;
+
 #ifdef __WXGTK20__
     wxGTKDCImpl *impldc = (wxGTKDCImpl*) dc.GetImpl();
     Init( gdk_cairo_create( impldc->GetGDKWindow() ) );
@@ -1260,8 +1272,6 @@ wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, const wxMemoryDC&
 #endif
 
 #ifdef __WXMAC__
-    int width, height;
-    dc.GetSize( &width, &height );
     CGContextRef cgcontext = (CGContextRef)dc.GetWindow()->MacGetCGContextRef();
     cairo_surface_t* surface = cairo_quartz_surface_create_for_cg_context(cgcontext, width, height);
     Init( cairo_create( surface ) );
@@ -1274,6 +1284,11 @@ wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, GdkDrawable *drawa
 : wxGraphicsContext(renderer)
 {
     Init( gdk_cairo_create( drawable ) );
+
+    int width, height;
+    gdk_drawable_get_size( drawable, &width, &height );
+    m_width = width;
+    m_height = height;
 }
 #endif
 
@@ -1282,9 +1297,9 @@ wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, HDC handle )
 : wxGraphicsContext(renderer)
 {
     m_mswSurface = cairo_win32_surface_create(handle);
-    m_context = cairo_create(m_mswSurface);
-    PushState();
-    PushState();
+    Init( cairo_create(m_mswSurface) );
+    m_width =
+    m_height = 0;
 }
 #endif
 
@@ -1293,6 +1308,8 @@ wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, cairo_t *context )
 : wxGraphicsContext(renderer)
 {
     Init( context );
+    m_width =
+    m_height = 0;
 }
 
 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, wxWindow *window)
@@ -1312,6 +1329,10 @@ wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, wxWindow *window)
     wxASSERT_MSG( window->m_wxwindow, wxT("wxCairoContext needs a widget") );
 
     Init(gdk_cairo_create(window->GTKGetDrawingWindow()));
+
+    wxSize sz = window->GetSize();
+    m_width = sz.x;
+    m_height = sz.y;
 #endif
 }
 
diff --git a/src/msw/graphics.cpp b/src/msw/graphics.cpp
index 3ea411303c..423947ee23 100644
--- a/src/msw/graphics.cpp
+++ b/src/msw/graphics.cpp
@@ -387,9 +387,6 @@ private:
     GraphicsState m_state1;
     GraphicsState m_state2;
 
-    wxDouble m_width;
-    wxDouble m_height;
-
     DECLARE_DYNAMIC_CLASS_NO_COPY(wxGDIPlusContext)
 };
 
diff --git a/src/osx/carbon/graphics.cpp b/src/osx/carbon/graphics.cpp
index 9b5ba91636..f165cbfdaa 100644
--- a/src/osx/carbon/graphics.cpp
+++ b/src/osx/carbon/graphics.cpp
@@ -1390,9 +1390,6 @@ public:
 
     void Init();
 
-    // returns the size of the graphics context in device coordinates
-    virtual void GetSize( wxDouble* width, wxDouble* height);
-
     virtual void StartPage( wxDouble width, wxDouble height );
 
     virtual void EndPage();
@@ -1506,8 +1503,6 @@ private:
 #endif
     bool m_contextSynthesized;
     CGAffineTransform m_windowTransform;
-    wxDouble m_width;
-    wxDouble m_height;
     bool m_invisible;
 
 #if wxOSX_USE_COCOA_OR_CARBON
@@ -1644,12 +1639,6 @@ wxMacCoreGraphicsContext::~wxMacCoreGraphicsContext()
     SetNativeContext(NULL);
 }
 
-void wxMacCoreGraphicsContext::GetSize( wxDouble* width, wxDouble* height)
-{
-    *width = m_width;
-    *height = m_height;
-}
-
 
 void wxMacCoreGraphicsContext::StartPage( wxDouble width, wxDouble height )
 {