From 273dd046c212b0139c8a691695d2a41b37f6f897 Mon Sep 17 00:00:00 2001
From: flashk <flashk@gmail.com>
Date: Wed, 3 Oct 2018 11:32:10 -0700
Subject: [PATCH] Fix for GifImageStream::setReferenceTime

Setting the reference time greater than the duration of a gif would cause a crash. Also, the current reference time is not immediately updated when manually setting the reference time.
---
 src/osgPlugins/gif/ReaderWriterGIF.cpp | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/osgPlugins/gif/ReaderWriterGIF.cpp b/src/osgPlugins/gif/ReaderWriterGIF.cpp
index 7e438dc3f..d9369902c 100644
--- a/src/osgPlugins/gif/ReaderWriterGIF.cpp
+++ b/src/osgPlugins/gif/ReaderWriterGIF.cpp
@@ -112,14 +112,15 @@ public:
 
         int i=1;
         int framePos = static_cast<int>(time*100.0/_multiplier);
-        if ( framePos>=(int)_length )
-            framePos = _length;
+        framePos = osg::clampBetween(framePos, 0, (int)_length);
+        _currentLength = framePos;
 
+        std::vector<FrameData*>::iterator lastFrame = --_dataList.end();
         std::vector<FrameData*>::iterator it;
         for ( it=_dataList.begin(); it!=_dataList.end(); it++,i++ )
         {
             framePos -= (*it)->delay;
-            if ( framePos<0 )
+            if ( framePos<0 || it == lastFrame )
                 break;
         }
         _dataNum = i-1;