From 09f30297f40a58f2aaa7a91a930088662becadbb Mon Sep 17 00:00:00 2001
From: kgv <kgv@opencascade.com>
Date: Fri, 23 Dec 2016 21:21:00 +0300
Subject: [PATCH] 0028276: Visualization, Graphic3d_ArrayOfPrimitives - fix
 usage of 16-bit indices

Graphic3d_ArrayOfPrimitives now check the amount of vertex data rather than amount of indices.
---
 src/Graphic3d/Graphic3d_ArrayOfPrimitives.cxx | 2 +-
 src/OpenGl/OpenGl_PrimitiveArray.cxx          | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/Graphic3d/Graphic3d_ArrayOfPrimitives.cxx b/src/Graphic3d/Graphic3d_ArrayOfPrimitives.cxx
index 6fe98f0f3e..037c05f85b 100644
--- a/src/Graphic3d/Graphic3d_ArrayOfPrimitives.cxx
+++ b/src/Graphic3d/Graphic3d_ArrayOfPrimitives.cxx
@@ -56,7 +56,7 @@ Graphic3d_ArrayOfPrimitives::Graphic3d_ArrayOfPrimitives (const Graphic3d_TypeOf
   if (theMaxEdges > 0)
   {
     myIndices = new Graphic3d_IndexBuffer (anAlloc);
-    if (theMaxEdges < Standard_Integer(USHRT_MAX))
+    if (theMaxVertexs < Standard_Integer(USHRT_MAX))
     {
       if (!myIndices->Init<unsigned short> (theMaxEdges))
       {
diff --git a/src/OpenGl/OpenGl_PrimitiveArray.cxx b/src/OpenGl/OpenGl_PrimitiveArray.cxx
index 47c789c6af..811097de6c 100644
--- a/src/OpenGl/OpenGl_PrimitiveArray.cxx
+++ b/src/OpenGl/OpenGl_PrimitiveArray.cxx
@@ -943,12 +943,13 @@ void OpenGl_PrimitiveArray::setDrawMode (const Graphic3d_TypeOfPrimitiveArray th
 Standard_Boolean OpenGl_PrimitiveArray::processIndices (const Handle(OpenGl_Context)& theContext) const
 {
   if (myIndices.IsNull()
+   || myAttribs.IsNull()
    || theContext->hasUintIndex)
   {
     return Standard_True;
   }
 
-  if (myIndices->NbElements > std::numeric_limits<GLushort>::max())
+  if (myAttribs->NbElements > std::numeric_limits<GLushort>::max())
   {
     Handle(Graphic3d_Buffer) anAttribs = new Graphic3d_Buffer (new NCollection_AlignedAllocator (16));
     if (!anAttribs->Init (myIndices->NbElements, myAttribs->AttributesArray(), myAttribs->NbAttributes))