How to save image from canvas with CSS filters

Question

I need to save an image after using CSS filters on the client-side (without using a backend). What I have so far:

1. Use CSS filters
2. Co

Answer 1

Your CSS properties are not actually applied to the canvas data. Think of the CSS as being another layer placed over the canvas element. You can implement your own image filters by using context.getImageData to get an array of raw RGBA values, then do your filter work and then write it back with context.putImageData. However, I think you really just want to save the output of the CSS filters. You may be able to do this using a tool like rasterizeHTML