I would recommend to clone the repo and then install it. "pdftoraster" currently runs as a standalone executable but I believe a simple replacement of pdftoraster located in "usr/lib/cups/filter" with the upstream file won't do the job.
I am sure that you will end up with the color case and not with grayscale case so please go on and try it. If you face anything absurd while installation feel free to ask about it.
I would recommend to clone the repo and then install it. "pdftoraster" currently runs as a standalone executable but I believe a simple replacement of pdftoraster located in "usr/lib/ cups/filter" with the upstream file won't do the job.
I am sure that you will end up with the color case and not with grayscale case so please go on and try it. If you face anything absurd while installation feel free to ask about it.