1 files changed, 46 insertions, 1 deletions
diff --git a/drawinglayer/source/geometry/viewinformation3d.cxx b/drawinglayer/source/geometry/viewinformation3d.cxx
index 3d4ee30cee33c..3ce81680f7c15 100644
--- a/drawinglayer/source/geometry/viewinformation3d.cxx
+++ b/drawinglayer/source/geometry/viewinformation3d.cxx
@@ -387,6 +387,18 @@ namespace drawinglayer
                 impInterpretPropertyValues(rViewParameters);
             }
 
+            ImpViewInformation3D()
+            :   mnRefCount(0),
+                maObjectTransformation(),
+                maOrientation(),
+                maProjection(),
+                maDeviceToView(),
+                mfViewTime(),
+                mxViewInformation(),
+                mxExtendedInformation()
+            {
+            }
+
             const basegfx::B3DHomMatrix& getObjectTransformation() const { return maObjectTransformation; }
             const basegfx::B3DHomMatrix& getOrientation() const { return maOrientation; }
             const basegfx::B3DHomMatrix& getProjection() const { return maProjection; }
@@ -432,6 +444,21 @@ namespace drawinglayer
                     && mfViewTime == rCandidate.mfViewTime
                     && mxExtendedInformation == rCandidate.mxExtendedInformation);
             }
+
+            static ImpViewInformation3D* get_global_default()
+            {
+                static ImpViewInformation3D* pDefault = 0;
+
+                if(!pDefault)
+                {
+                    pDefault = new ImpViewInformation3D();
+
+                    // never delete; start with RefCount 1, not 0
+                    pDefault->mnRefCount++;
+                }
+
+                return pDefault;
+            }
         };
     } // end of anonymous namespace
 } // end of namespace drawinglayer
@@ -449,7 +476,9 @@ namespace drawinglayer
             const basegfx::B3DHomMatrix& rDeviceToView,
             double fViewTime,
             const uno::Sequence< beans::PropertyValue >& rExtendedParameters)
-        :   mpViewInformation3D(new ImpViewInformation3D(rObjectObjectTransformation, rOrientation, rProjection, rDeviceToView, fViewTime, rExtendedParameters))
+        :   mpViewInformation3D(new ImpViewInformation3D(
+                rObjectObjectTransformation, rOrientation, rProjection,
+                rDeviceToView, fViewTime, rExtendedParameters))
         {
         }
 
@@ -458,6 +487,12 @@ namespace drawinglayer
         {
         }
 
+        ViewInformation3D::ViewInformation3D()
+        :   mpViewInformation3D(ImpViewInformation3D::get_global_default())
+        {
+            mpViewInformation3D->mnRefCount++;
+        }
+
         ViewInformation3D::ViewInformation3D(const ViewInformation3D& rCandidate)
         :   mpViewInformation3D(rCandidate.mpViewInformation3D)
         {
@@ -479,6 +514,11 @@ namespace drawinglayer
             }
         }
 
+        bool ViewInformation3D::isDefault() const
+        {
+            return mpViewInformation3D == ImpViewInformation3D::get_global_default();
+        }
+
         ViewInformation3D& ViewInformation3D::operator=(const ViewInformation3D& rCandidate)
         {
             ::osl::Mutex m_mutex;
@@ -505,6 +545,11 @@ namespace drawinglayer
                 return true;
             }
 
+            if(rCandidate.isDefault() != isDefault())
+            {
+                return false;
+            }
+
             return (*rCandidate.mpViewInformation3D == *mpViewInformation3D);
         }