Added support for <image "start=10"> property that tells a video to start specificied number of sections into a video.

include/osgPresentation/SlideShowConstructor

@@ -252,7 +252,10 @@ public:
             imageSequence(false),
             imageSequencePagingMode(osg::ImageSequence::PAGE_AND_DISCARD_USED_IMAGES),
             imageSequenceInteractionMode(PLAY_AUTOMATICALLY_LIKE_MOVIE),
-            blendingHint(USE_IMAGE_ALPHA)
+            blendingHint(USE_IMAGE_ALPHA),
+            delayTime(0.0),
+            startTime(0.0),
+            stopTime(-1.0)            
         {}
 
         std::string                     options;
@@ -285,7 +288,11 @@ public:
             ON
         };
         
-        BlendingHint blendingHint;
+        BlendingHint    blendingHint;
+
+        double          delayTime;
+        double          startTime;
+        double          stopTime;
 
     };
 

src/osgPlugins/p3d/ReaderWriterP3D.cpp

@@ -956,6 +956,24 @@ bool ReaderWriterP3DXML::getProperties(osgDB::XmlNode*cur, osgPresentation::Slid
         OSG_NOTIFY(_notifyLevel)<<"read blendingHint \""<<value.blendingHint<<"\""<<std::endl;
     }
 
+    if (getProperty(cur, "delay", value.delayTime))
+    {
+        propertiesRead = true;
+        OSG_NOTIFY(_notifyLevel)<<"read delay \""<<value.delayTime<<"\""<<std::endl;
+    }
+
+    if (getProperty(cur, "start", value.startTime))
+    {
+        propertiesRead = true;
+        OSG_NOTIFY(_notifyLevel)<<"read start \""<<value.startTime<<"\""<<std::endl;
+    }
+
+    if (getProperty(cur, "stop", value.stopTime))
+    {
+        propertiesRead = true;
+        OSG_NOTIFY(_notifyLevel)<<"read stop \""<<value.stopTime<<"\""<<std::endl;
+    }
+
     /*
     if (getProperty(cur, "texcoord_offset", value.texcoord_offset))
     {

src/osgPresentation/SlideEventHandler.cpp

@@ -176,18 +176,19 @@ struct ImageStreamOperator : public ObjectOperator
 
     virtual void enter(SlideEventHandler* seh)
     {
-        OSG_INFO<<"enter() : _imageStream->rewind() + play"<<std::endl;
+        OSG_NOTICE<<"enter() : _imageStream->rewind() + play"<<std::endl;
 
         reset(seh);
     }
 
     virtual void maintain(SlideEventHandler*)
     {
+        OSG_NOTICE<<"ImageStreamOperator::maintain()"<<std::endl;
     }
 
     virtual void leave(SlideEventHandler*)
     {
-       OSG_INFO<<"leave() : _imageStream->pause()"<<std::endl;
+       OSG_NOTICE<<"leave() : _imageStream->pause()"<<std::endl;
 
         _imageStream->pause();
     }
@@ -202,10 +203,19 @@ struct ImageStreamOperator : public ObjectOperator
 
     virtual void reset(SlideEventHandler*)
     {
+        OSG_NOTICE<<"ImageStreamOperator::reset()"<<std::endl;
+
         osg::ImageStream::StreamStatus previousStatus = _imageStream->getStatus();
 
-        _imageStream->rewind();
-
+        double startTime;
+        if (_imageStream->getUserValue("start",startTime))
+        {
+            _imageStream->seek(startTime);
+        }
+        else
+        {
+            _imageStream->rewind();
+        }
 
         //_imageStream->setVolume(previousVolume);
 

src/osgPresentation/SlideShowConstructor.cpp

@@ -1114,6 +1114,10 @@ osg::Image* SlideShowConstructor::readImage(const std::string& filename, const I
         image = imageSequence;
     }
 
+    if (imageData.delayTime>0.0) image->setUserValue("delay",imageData.delayTime);
+    if (imageData.startTime>0.0) image->setUserValue("start",imageData.startTime);
+    if (imageData.stopTime>0.0) image->setUserValue("stop",imageData.stopTime);
+
     return image.release();
 }