From ef9a9362ae805f29204577131cd525cb49fed11f Mon Sep 17 00:00:00 2001
From: kgv <kgv@opencascade.com>
Date: Fri, 11 Nov 2016 18:20:49 +0300
Subject: [PATCH] 0028093: Visualization - access violation on removal of
 dynamic highlighting after device loss

OpenGl_Layer::Remove() now tries to remove object from myAlwaysRenderedMap
if it was not removed from other groups.
---
 src/OpenGl/OpenGl_Layer.cxx | 20 ++++++++++++--------
 tests/bugs/vis/bug28093     | 18 ++++++++++++++++++
 2 files changed, 30 insertions(+), 8 deletions(-)
 create mode 100644 tests/bugs/vis/bug28093

diff --git a/src/OpenGl/OpenGl_Layer.cxx b/src/OpenGl/OpenGl_Layer.cxx
index 24585779bd..6b6c05e3a2 100644
--- a/src/OpenGl/OpenGl_Layer.cxx
+++ b/src/OpenGl/OpenGl_Layer.cxx
@@ -108,7 +108,18 @@ bool OpenGl_Layer::Remove (const OpenGl_Structure* theStruct,
 
       if (!isForChangePriority)
       {
-        if (theStruct->IsAlwaysRendered())
+        Standard_Boolean isAlwaysRend = theStruct->IsAlwaysRendered();
+        if (!isAlwaysRend)
+        {
+          if (!myBVHPrimitives.Remove (theStruct))
+          {
+            if (!myBVHPrimitivesTrsfPers.Remove (theStruct))
+            {
+              isAlwaysRend = Standard_True;
+            }
+          }
+        }
+        if (isAlwaysRend)
         {
           const Standard_Integer anIndex2 = myAlwaysRenderedMap.FindIndex (theStruct);
           if (anIndex2 != 0)
@@ -117,13 +128,6 @@ bool OpenGl_Layer::Remove (const OpenGl_Structure* theStruct,
             myAlwaysRenderedMap.RemoveLast();
           }
         }
-        else
-        {
-          if (!myBVHPrimitives.Remove (theStruct))
-          {
-            myBVHPrimitivesTrsfPers.Remove (theStruct);
-          }
-        }
       }
       --myNbStructures;
       thePriority = aPriorityIter;
diff --git a/tests/bugs/vis/bug28093 b/tests/bugs/vis/bug28093
new file mode 100644
index 0000000000..e55f517a05
--- /dev/null
+++ b/tests/bugs/vis/bug28093
@@ -0,0 +1,18 @@
+puts "==========="
+puts "OCC28093"
+puts "Visualization - access violation on removal of dynamic highlighting after device loss"
+puts "==========="
+puts ""
+
+pload MODELING VISUALIZATION
+box b 1 2 3
+vclear
+vinit View1
+vdisplay -dispMode 1 -highMode 1 b
+vfit
+
+vmoveto 250 250
+vraytrace 1
+vmoveto 400 400
+
+vdump $imagedir/${casename}.png