How to read an image pixels in a composer node to dump to a composer operation?

Archive Blender Development
1

I’d like to get all the different colors of an input image and dump the table in an operation. How would you do it?

I’m trying to do a color remap / dithering composing node. I’ve got the node to appear in blender, but I’m kind of stuck on how to read the colors from the color map image. Any suggestion?

https://blender.stackexchange.com/questions/200369/color-remap-dithering-composing-node

2

I’ve managed to do it with a WriteBufferOperation and a ReadBufferOperation.