I am currently going through the PSET 4 sheet and have just read up to the part where it is being explained that if the number of bytes in each scan line is not a multiple of 4 then it is padded out. I can't get my head around why this padding is required though ? What is the significance of having each scan line as a multiple of 4 bytes? I'm assuming there is a simple reason that I am overlooking but nothing obvious stands out to me at the moment.
Anyone able to help explain this for me or at least point me in the right direction ?