Paint Pixels to Screen via Linux FrameBuffer

Question

I was recently struck by a curious idea to take input from /dev/urandom, convert relevant characters to random integers, and use those integers as the rgb/x-y values for pix

Answer 1

You should use fb_fix_screeninfo.smem_len for screensize instead of doing the multiplication yourself. The buffer might be align on 4 bytes or something else.

screensize = finfo.smem_len;