CPU Usage goes upto 50% when redrawing image Adornment, any work around ?

Question

Hi All,
I am struck in a very strange situation. I am trying to draw an image as adornment on a text box.
In adornment draw method as soon as i call gPort->image() my image is drawn. But when I move the textbox in Indesign document, adornment redraw doesn't take place at all or is very slow and partial.
To remove this I have called ILayoutUIUtils::InvalidateViews() on the document. Which Solves the issue of Redraw But a New Issue came up with Indesign CPU Usage goes upto 50% just to draw Adornment. Which is not acceptable. The reason for high CPU usgae may be recursive calls to Draw method, caused by InvalidateViews().
Below is the relevant code snippet:
void MyAdornment::Draw(IShape* shape, AdornmentDrawOrder drawOrder, GraphicsData* graphicsData, int32 flags)
         // .... code to create a AGMImageRecord
        gPort->image(pCurAGMImage, transformMatrix, 0);
        InterfacePtr<IPMPersist> persist(itemGeometry, UseDefaultIID());
        ASSERT__BREAK((persist == nil), "WExtAdornment::Draw: IPMPersist interface pointer nil");
        IDataBase*            theDB            = persist->GetDataBase();
        InterfacePtr<IDocument> theDoc(theDB, theDB->GetRootUID(), UseDefaultIID());
        ASSERT__BREAK((theDoc == nil), "WExtAdornment::Draw: IDocument pointer nil");
        Utils<ILayoutUIUtils>()->InvalidateViews(theDoc);
Is there any other way to redraw my adornment image quickly and neatly, while not causing these unnecessary recursive calls ?
Any suggestion will be appreceiated.
Thanks,
D

Answer 1

Hi All, Please Suggest something. I am struck at it and lost all hope to ever solve it.