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microsoft / Lumia-imaging-sdk

Lumia Imaging SDK is a comprehensive set of GPU/CPU imaging tools and effects that run on both mobile and desktop, with high speed and memory efficiency. Samples and extras code are included.
MIT License
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How to Undo an effect? #12

Open Monsok opened 8 years ago

Monsok commented 8 years ago

How do I undo an applied effect? I could not find an example in the source code.

davidbozjak commented 8 years ago

There is no concept of "undo", the rendering chain produces an output given an input and the effects in the rendering chain and their parameters. To get a different output simply change the rendering chain and then call RenderAsync() on your renderer again.

Monsok commented 8 years ago

Thanks! Based on your suggestion, I just feed the original image source as IImageProvider and call RenderAsync() again. Something like

    public async Task RenderOriginal(IImageProvider sourceImage)
    {

        if (m_swapChainPanelRenderer == null)
        {
            m_swapChainPanelRenderer = new SwapChainPanelRenderer(sourceImage, SwapChainPanel);
        }
        m_swapChainPanelRenderer.RenderOptions = Lumia.Imaging.RenderOptions.Mixed;
        m_swapChainPanelRenderer.Source = sourceImage;

        await m_swapChainPanelRenderer.RenderAsync().AsTask().ConfigureAwait(false);
    }
davidbozjak commented 8 years ago

Exactly.