[Sugar-devel] testing composition for speeding up graphics performance

[Eduardo H. Silva]

2009/6/19 Gary C Martin <gary at garycmartin.com>:
> On 18 Jun 2009, at 10:29, Tomeu Vizoso wrote:
>
>> On Thu, Jun 18, 2009 at 11:21, Sascha
>> Silbe<sascha-ml-ui-sugar-devel at silbe.org> wrote:
>>> On Thu, Jun 18, 2009 at 11:09:06AM +0200, Tomeu Vizoso wrote:
>>>
>>>> Wonder if that's intended, as going to a zoom level involves some
>>>> kind
>>>> of animation, i.e. is not intended to take you there as fast as
>>>> possible.
>>>
>>> What kind of animation? I can't remember ever having seen one
>>> (unless you
>>> count the time it takes to populate the screen).
>>
>> It's not supposed to be too obvious. It's more visible if you go from
>> the home level to the neighborhood, you should see the XO zooming out
>> before the screen is redrawn.
>
> Yes I agree with that, but only if you are changing from one of the
> base 3 zoom levels to another. Once you switch to an Activity level
> zoom, there should be no zoom from some old negihbourhood/group/home
> state to a new one that you're trying to switch to. If we had posh HW
> accelerated compositing, the animation should be something like a
> cross-dissolve and dolly back from the Activity view level to the new
> negihbourhood/group/home view.
>
> Of course, the current behaviour is correct 33% of the time :-)
> because you may be going back to the same zoom view as before, it's
> only the other 66% of the time that you get shown an initially
> incorrect zoom view.
>
> Hmmm, I seem to remember an old ticket where this problem was showing
> up before, had some almost complete patches if I remember (gee, now
> who was working on that, I remember testing the patches through
> several revisions)... Any one know?

Is it this one?  It doesn't have patches though

http://dev.laptop.org/ticket/4039

Eduardo

> Regards,
> --Gary
>
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