android: In Impress, switch to the 'Normal' (slides) view.

Other modes are not fit for the tiled rendering, and crash the viewer.

Change-Id: I6fb17663203d9eb298bba2b9bd143fdd28ffb470

include/vcl/ITiledRenderable.hxx

@@ -84,6 +84,10 @@ public:
         (void) ePartMode;
     }
 
+    /**
+     * Setup various document properties that are needed for the document to
+     * be renderable via tiled rendering.
+     */
     virtual void initializeForTiledRendering()
     {
     }

sd/source/ui/inc/unomodel.hxx

@@ -240,6 +240,9 @@ public:
     virtual OUString getPartName( int nPart ) SAL_OVERRIDE;
     virtual void setPartMode( LibreOfficeKitPartMode ePartMode ) SAL_OVERRIDE;
 
+    /// @see ITiledRenderable::initializeForTiledRendering().
+    virtual void initializeForTiledRendering() SAL_OVERRIDE;
+
     // XComponent
 
     /** This dispose implementation releases the resources held by the

sd/source/ui/unoidl/unomodel.cxx

@@ -2347,6 +2347,11 @@ Size SdXImpressDocument::getDocumentSize()
     return Size(convertMm100ToTwip(aSize.getWidth()), convertMm100ToTwip(aSize.getHeight()));
 }
 
+void SdXImpressDocument::initializeForTiledRendering()
+{
+    // tiled rendering works only when we are in the 'Normal' view, switch to that
+    mpDocShell->GetViewShell()->GetViewFrame()->GetDispatcher()->Execute(SID_VIEWSHELL0, SfxCallMode::SYNCHRON | SfxCallMode::RECORD);
+}
 
 uno::Reference< i18n::XForbiddenCharacters > SdXImpressDocument::getForbiddenCharsTable()
 {