From c0a276e85023927cd056a28a028523ff709b8492 Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Wed, 29 Nov 2017 10:11:35 +0000
Subject: [PATCH] Added back in serializer support for comput dispatch groups
 to retain backwards compatibility.

---
 src/osgWrappers/serializers/osg/Program.cpp | 29 +++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/src/osgWrappers/serializers/osg/Program.cpp b/src/osgWrappers/serializers/osg/Program.cpp
index 13195c87d..74e0342c3 100644
--- a/src/osgWrappers/serializers/osg/Program.cpp
+++ b/src/osgWrappers/serializers/osg/Program.cpp
@@ -121,6 +121,25 @@ static bool writeFeedBackMode( osgDB::OutputStream& os, const osg::Program& attr
 	os << attr.getTransformFeedBackMode()<< std::endl;
 	return true;
 }
+// _numGroupsX/Y/Z
+static bool checkComputeGroups( const osg::Program& attr )
+{
+    return false;
+}
+
+static bool readComputeGroups( osgDB::InputStream& is, osg::Program& attr )
+{
+    GLint numX = 0, numY = 0, numZ = 0;
+    is >> numX >> numY >> numZ;
+    return true;
+}
+
+static bool writeComputeGroups( osgDB::OutputStream& os, const osg::Program& attr )
+{
+    GLint numX = 0, numY = 0, numZ = 0;
+    os << numX << numY << numZ << std::endl;
+    return true;
+}
 
 static bool checkBindUniformBlock( const osg::Program& node )
 {
@@ -167,6 +186,16 @@ REGISTER_OBJECT_WRAPPER( Program,
     ADD_USER_SERIALIZER( GeometryInputType );  // _geometryInputType
     ADD_USER_SERIALIZER( GeometryOutputType );  // _geometryOutputType
 
+    {
+        UPDATE_TO_VERSION_SCOPED( 95 )
+        ADD_USER_SERIALIZER( ComputeGroups );  // _numGroupsX/Y/Z
+    }
+
+    {
+        UPDATE_TO_VERSION_SCOPED( 153 )
+        REMOVE_SERIALIZER( ComputeGroups );
+    }
+
     {
         UPDATE_TO_VERSION_SCOPED( 116 )
         ADD_USER_SERIALIZER( FeedBackVaryingsName );