+Anatolij, Nikita
Hi,
On 2 March 2015 at 03:12, Hannes Petermaier Hannes.Petermaier@br-automation.com wrote:
Hello everybody,
A short question about lcd-console:
Today u-boot only supports a 'linear framebuffer', meaning the next pixel of a character is allways right after left and the framebuffer address is incrementing. We call this the display is mounted with 0° rotation.
In some cases we have a rotated display. Maybe rotated by 90° to have portrait mode or even 180° due to mechanical issues.
My question is: Is anybody currently working around this, having rotated display ? If not so, i would like start a implementation.
180° is quite easy, we only need to add some offset (total len of framebuffer) to our framebuffer base address and do -- instead ++ for drawing characters. Font can be reused.
In the other cases, 90° and 270° it will maybe a bit tricky. I think a ?rotated font? is also necessary.
Of course we have to think about the other functions like scroll up/down.
I don't know of anything, but it sounds useful.
Also I wonder if some hardware has support for this?
Nikita (on CC) is tidying up this part of U-Boot so get in touch with him.
Regards, Simon