From 35eb53cc95b2ac781a45a24ce4f772d368b1ac3b Mon Sep 17 00:00:00 2001
From: Julien Valentin <pascal@pcpascal.WORKGROUP>
Date: Wed, 2 Aug 2017 22:10:02 +0200
Subject: [PATCH] add MDI support

---
 src/osgUtil/DrawElementTypeSimplifier.cpp | 39 +++++++++++++++++++++++
 1 file changed, 39 insertions(+)

diff --git a/src/osgUtil/DrawElementTypeSimplifier.cpp b/src/osgUtil/DrawElementTypeSimplifier.cpp
index 6397f8e06..14f359649 100644
--- a/src/osgUtil/DrawElementTypeSimplifier.cpp
+++ b/src/osgUtil/DrawElementTypeSimplifier.cpp
@@ -1,3 +1,4 @@
+#include <osg/PrimitiveSetIndirect>
 #include <osgUtil/DrawElementTypeSimplifier>
 
 #include <osg/Geode>
@@ -61,6 +62,44 @@ void DrawElementTypeSimplifier::simplify(osg::Geometry & geometry) const
 
                 break;
             }
+            case osg::PrimitiveSet::DrawElementsUShortIndirectPrimitiveType:
+            {
+                osg::DrawElementsIndirectUShort & de = *static_cast<osg::DrawElementsIndirectUShort*>(it->get());
+
+                max = getMax<osg::DrawElementsIndirectUShort>(de);
+                if (max < 255) *it = copy<osg::DrawElementsIndirectUShort, osg::DrawElementsIndirectUByte>(de);
+
+                break;
+            }
+            case osg::PrimitiveSet::DrawElementsUIntIndirectPrimitiveType:
+            {
+                osg::DrawElementsIndirectUInt & de = *static_cast<osg::DrawElementsIndirectUInt*>(it->get());
+
+                max = getMax<osg::DrawElementsIndirectUInt>(de);
+                if (max < 256) *it = copy<osg::DrawElementsIndirectUInt, osg::DrawElementsIndirectUByte>(de);
+                else if (max < 65536) *it = copy<osg::DrawElementsIndirectUInt, osg::DrawElementsIndirectUShort>(de);
+
+                break;
+            }
+            case osg::PrimitiveSet::MultiDrawElementsUShortIndirectPrimitiveType:
+            {
+                osg::MultiDrawElementsIndirectUShort & de = *static_cast<osg::MultiDrawElementsIndirectUShort*>(it->get());
+
+                max = getMax<osg::MultiDrawElementsIndirectUShort>(de);
+                if (max < 255) *it = copy<osg::MultiDrawElementsIndirectUShort, osg::MultiDrawElementsIndirectUByte>(de);
+
+                break;
+            }
+            case osg::PrimitiveSet::MultiDrawElementsUIntIndirectPrimitiveType:
+            {
+                osg::MultiDrawElementsIndirectUInt & de = *static_cast<osg::MultiDrawElementsIndirectUInt*>(it->get());
+
+                max = getMax<osg::MultiDrawElementsIndirectUInt>(de);
+                if (max < 256) *it = copy<osg::MultiDrawElementsIndirectUInt, osg::MultiDrawElementsIndirectUByte>(de);
+                else if (max < 65536) *it = copy<osg::MultiDrawElementsIndirectUInt, osg::MultiDrawElementsIndirectUShort>(de);
+
+                break;
+            }
             default: break;
         }
     }