Spectrum plot feedback

Audio Plugins
1

Hi All,
Is this possible for blurring a spectrum plot? I wanted to add a form of image feedback. Could I use the ScopedSaveState?

void paint (Graphics& g) override
    {
        spectrumFeedBack.multiplyAllAlphas (0.5f);
        g.drawImageAt(spectrumFeedBack, 0, 0, false);
//other drawing code here
    }
void timerCallback() override
    {
       if ( processor.checkForNewData() )
        {
 //set the spectrum plot from the processor
            repaint ();
            spectrumFeedBack =  createComponentSnapshot (getLocalBounds(), false);
        }
    }
    private:
    Image spectrumFeedBack;

Thank you all