use RawBitmap and BitmapEx in DffPropertyReader

part of making Bitmap an internal feature of vcl

Change-Id: I2945005b9070bc13844c02f8ecaa349920d151fe
Reviewed-on: https://gerrit.libreoffice.org/49579Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

filter/source/graphicfilter/icgm/actimpr.cxx

@@ -555,7 +555,7 @@ void CGMImpressOutAct::DrawBitmap( CGMBitmapDescriptor* pBmpDesc )
         if ( pBmpDesc->mbVMirror )
             nMirr |= BmpMirrorFlags::Vertical;
         if ( nMirr != BmpMirrorFlags::NONE )
-            pBmpDesc->mxBitmap.Mirror( nMirr ); // FIXME
+            pBmpDesc->mxBitmap.Mirror( nMirr );
 
         mpCGM->ImplMapPoint( aOrigin );
         mpCGM->ImplMapX( fdx );

include/vcl/BitmapTools.hxx

@@ -39,6 +39,8 @@ public:
         mpData[ p++ ] = nColor.GetGreen();
         mpData[ p   ] = nColor.GetBlue();
     }
+    long Height() { return maSize.Height(); }
+    long Width() { return maSize.Width(); }
 };
 
 BitmapEx VCL_DLLPUBLIC loadFromName(const OUString& rFileName, const ImageLoadFlags eFlags = ImageLoadFlags::NONE);