substantially accelerate slides with media on them.

Don't pre-roll, and re-snapshot the video for every move of the mouse,
click, partial re-render etc. Cache that instead on the SdrMediaObj.
Remove unused setGraphic method.

Change-Id: Id2af2f0bba857078480783dd6a7ee89f9b331b1b

svx/inc/svx/svdomedia.hxx

@@ -77,7 +77,8 @@ public:
 
         Size                        getPreferredSize() const;
 
-        void                        setGraphic( const Graphic* pGraphic = NULL );
+        ::com::sun::star::uno::Reference< ::com::sun::star::graphic::XGraphic >
+                                    getSnapshot();
         ::com::sun::star::uno::Reference< ::com::sun::star::io::XInputStream>
                                     GetInputStream();
 

svx/source/sdr/contact/viewcontact.cxx

@@ -120,7 +120,7 @@ namespace sdr
             if(!pRetval)
             {
                 // create a new one. It's inserted to the local list from the
-                // VieObjectContact constructor via AddViewObjectContact()
+                // ViewObjectContact constructor via AddViewObjectContact()
                 pRetval = &CreateObjectSpecificViewObjectContact(rObjectContact);
             }
 

svx/source/sdr/contact/viewcontactofsdrmediaobj.cxx

@@ -152,7 +152,7 @@ namespace sdr
             const drawinglayer::primitive2d::Primitive2DReference xRetval(
                 new drawinglayer::primitive2d::MediaPrimitive2D(
                     aTransform, rURL, aBackgroundColor, nPixelBorder,
-                            avmedia::MediaWindow::grabFrame(rURL, true)));
+                    GetSdrMediaObj().getSnapshot()));
 
             return drawinglayer::primitive2d::Primitive2DSequence(&xRetval, 1);
         }

svx/source/svdraw/svdomedia.cxx

@@ -71,8 +71,8 @@ struct MediaTempFile
 struct SdrMediaObj::Impl
 {
     ::avmedia::MediaItem                  m_MediaProperties;
-    ::boost::scoped_ptr<Graphic>       m_pGraphic;
-    ::boost::shared_ptr<MediaTempFile> m_pTempFile;
+    ::boost::shared_ptr< MediaTempFile >  m_pTempFile;
+    uno::Reference< graphic::XGraphic >   m_xCachedSnapshot;
 };
 
 TYPEINIT1( SdrMediaObj, SdrRectObj );
@@ -185,10 +185,17 @@ SdrMediaObj& SdrMediaObj::operator=(const SdrMediaObj& rObj)
 
     m_pImpl->m_pTempFile = rObj.m_pImpl->m_pTempFile; // before props
     setMediaProperties( rObj.getMediaProperties() );
-    setGraphic( rObj.m_pImpl->m_pGraphic.get() );
+    m_pImpl->m_xCachedSnapshot = rObj.m_pImpl->m_xCachedSnapshot;
     return *this;
 }
 
+uno::Reference< graphic::XGraphic > SdrMediaObj::getSnapshot()
+{
+    if( !m_pImpl->m_xCachedSnapshot.is() )
+        m_pImpl->m_xCachedSnapshot = avmedia::MediaWindow::grabFrame(getURL(), true);
+    return m_pImpl->m_xCachedSnapshot;
+}
+
 // ------------------------------------------------------------------------------
 
 void SdrMediaObj::AdjustToMaxRect( const Rectangle& rMaxRect, bool bShrinkOnly /* = false */ )
@@ -276,12 +283,6 @@ Size SdrMediaObj::getPreferredSize() const
 
 // ------------------------------------------------------------------------------
 
-void SdrMediaObj::setGraphic( const Graphic* pGraphic )
-{
-    m_pImpl->m_pGraphic.reset( pGraphic ? new Graphic( *pGraphic ) : NULL );
-}
-
-// ------------------------------------------------------------------------------
 uno::Reference<io::XInputStream> SdrMediaObj::GetInputStream()
 {
     if (!m_pImpl->m_pTempFile)
@@ -362,7 +363,7 @@ void SdrMediaObj::mediaPropertiesChanged( const ::avmedia::MediaItem& rNewProper
     if( ( AVMEDIA_SETMASK_URL & nMaskSet ) &&
         ( rNewProperties.getURL() != getURL() ))
     {
-        setGraphic();
+        m_pImpl->m_xCachedSnapshot = uno::Reference< graphic::XGraphic >();
         ::rtl::OUString const url(rNewProperties.getURL());
         if ((0 == rtl_ustr_ascii_shortenedCompareIgnoreAsciiCase_WithLength(
                 url.getStr(), url.getLength(),