Linux gui/terminal distribution modify the output pixels/character buffer

Question

Hello!
How can I modify my linux output buffer?
Example, how do I modify it so that each row 2nd consists of black pixels.
Which part of linux system set up the buffer, which send to the screen?
And how can I modify, example with a program?

Answer 1

your post is confusing, title, tags and content.
you want terminal output to be colored or what?

Answer 2

it depends on how you want to do that, in userspace or lower level.
I suggest you read about Linux frame buffer and its api.
for low level approach, check" low level devel" channel on YouTube he has some interesting stuff there.
look for : "Raspberry pi bare metal tutorial part 14 (hdmi video)"

Answer 3

Bahha🐧 Thanks for helping, I more like to do that in low level

Answer 4

Bahha🐧 I'm working with a raspberry pi 4 with a linux distribution installed and I want to modify the data which send to a monitor throught the HDMI port.
That data can be modified, rewritten, edited in some way? And how can I do that?