How to restore image after using the filter

[margiPalanBVI]

Hello,

I require that I convert the image into a sketch filter and on the slider of restore I want to have the original image based on the slider value, guide me to how can I achieve this.

and also I need to implement recolor functionality by slider

[margiPalanBVI]

hello, I have made changes to the Metal files according my requirements, so its working