Rotating:
Rotating is a little tricky. Basically you have to reverse the height and
the width, but getting the pixels in the proper order can be a little bit of
a brain twister. It's easiest to use embedded for loops: one which counts
from 0 to the height and the other which counts from 0 to the width. Then
you simply make your assignments like this:
hold[x*h+y]=pixel[y*w+x]; Where x is the width counter and y is the height counter. |