[maemo-developers] [maemo-developers] 800x480

[From: Asko Kauppi]

Fullscreen mode is all I wanted, but the points on keyboard/ 
recognition are good ones.  So is the link to xrandr, will check. :)


Aleksandr Koltsoff kirjoitti 30.5.2005 kello 8.25:

> On Saturday 28 May 2005 22:46, Asko Kauppi wrote:
>
>> Ability to swap horizontal/vertical (at least in full screen mode)
>> would be an almost must-have for this device.  I know SDL could do
>> it, at some level, but there are issues s.a. blitting images on the
>> screen that might be more elaborate.
>>
>> Has there been discussion/plans upon this?  Best of all: ability to
>> sensor current physical orientation, and adopt instantaniously.
>>
>
> Hello ak :-),
>
> At least I know that the AF get's a bit flaky if its screen  
> resolution is
> anything else than 800x480 (like 480x800). So I think (note I  
> haven't seen
> 770 myself) that providing Xrandr would be limited (currently) to  
> fullscreen
> applications that could use it, but the application should switch  
> back to the
> "natural" orientation on exit. I don't know whether the AF will be  
> fixed to
> handle that situation. Although screen space will be quite limited for
> usability in the other orientation as it is. Also the on-screen  
> keyboard
> might get somewhat confused, as well as the hand-writing recognition.
>
> As for SDL, it's pretty simple since it can fake the screen  
> orientation. The
> problem will be with a rotational transform when "blitting" (the  
> 770 doesn't
> have a graphics processor). So this would make sw based blitting  
> quite slow
> as for each copied rect area, the access pattern would be left->right
> (top->bottom) instead of the normal top->bottom (left->right) and I  
> would
> imagine that the memory bus is not optimized to handle wide strides  
> like
> this. This might be how X does Xrandr as well, but it has the  
> advantage of
> having Xrender (on some platforms) which can do the rotation in  
> hardware so
> in those cases it's not an issue.
>
> Please correct me if I'm wrong, I haven't read Kdrive/Xrandr-sources.
>
> ak.
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