Sven Luther [off-list ref] writes:

quoted

quoted

I'm about to implement rotation which is needed for devices like the ipaq. 
The question is do we flip the xres and yres values depending on the 
rotation or do we just alter the data that will be drawn to make the 
screen appear to rotate. How does hardware rotate view the x and y axis?
Are they rotated or does just the data get rotated? 

Where are you going to implement the rotation? At the fbcon or fbdev level?

Fbcon has the advantage that it'll work for all frame buffer devices.

But you could also provide driver hooks for the chips which have such a
rotation feature included (don't know if such exist, but i suppose they
do, or may in the future).

I heard of someone have problems with the display getting rotated in
Windows.  I don't know what chip it was.

-- 
Måns Rullgård
mru@users.sf.net