[Sugar-devel] [DESIGN] Test startup animations

[Gonzalo Odiard]

Gary,
We are looking if this can land one of this in 0.94
I am proposing land the first version, already reviewed by Simon and Sasha,
and improve it later with your suggestion.
In fact, I think what you are proposing is simpler than what I did.
Is this a good alternative for you?

Gonzalo


On Thu, Aug 11, 2011 at 2:24 PM, Gary Martin <garycmartin at googlemail.com>wrote:

> Hi Gonzalo,
>
> On 5 Aug 2011, at 20:47, Gonzalo Odiard wrote:
>
> > I have prepared a few videos to show the change in the startup animation
> I am proposing
> > In all the videos, at the right is one XO with the patch and the left is
> another without the patch,
> > the method to compare the times is not very scientific, but I have tried
> to start the activities at the same time :)
> >
> > In the first test, I used alpha and scale cairo operations to modify to
> render only one time the icon
> > you can see the zoom effect at the start and a little improvement in
> startup time:
> >
> > http://www.youtube.com/watch?v=dE7eXjsQm_g
> >
> > http://www.youtube.com/watch?v=nHqcdsAFvgE
> >
> > http://www.youtube.com/watch?v=g4qMB4eayU4
>
> Fab! That's a good 2 or 3 seconds shaved off activity start time, a very
> important metric, even given we loose the original pulse design (i.e.
> pulsing between grey+white & user colours provides better contrast; the
> monochrome to colour also suggests an activity bundle starting up and
> becoming a users own activity).
>
> Are these two test machines XO-1, or XO-1.5s?
>
> Regarding the zoom effect, it's great it is finally showing up ;-) but I
> wonder if the timing is different, it feels very slow/smooth/linear, is it
> using the same zoom maths as on previous Sugars? I'll need to have a tinker
> to see/check how it used to be.
>
> > If you want test in your system, you can download
> http://dev.laptop.org/~gonzalo/alpha-pulsingicon/files_animation.zip
> > and copy the files in the directory pulse in the following directories:
> > icon.py -> /usr/lib/python/python2.7/site-packages/sugar/graphics/
> > launcher.py and pulsingicon.py ->
> /usr/lib/python/python2.7/site-packages/jarabe/view/
> >
> > The patches are:
> >
> http://dev.laptop.org/~gonzalo/alpha-pulsingicon/Add-alpha-and-scale-functionality-to-the-icon-can-be-used-in-the-launcher-to-do-the-animation---v2.patch
> >
> http://dev.laptop.org/~gonzalo/alpha-pulsingicon/0001-Do-startup-animation-of-the-activity-icon-using-scal.patch
> >
> > You can see the effect is different, and may be is not so good like the
> original.
> >
> > I did another try using two buffers, with the different colors, and
> changing the alpha
> > to obtain a similar effect. The code is a lot more complex, and is a
> little slower obviously.
> >
> > http://www.youtube.com/watch?v=9rLaE0TKZXw
> >
> > http://www.youtube.com/watch?v=-Q2RliMTLRM
> >
> > http://www.youtube.com/watch?v=SHBCSnrGsjA
>
> I do find these more visible as the grey/white stage of the pulse is
> guaranteed to provide some contrast even if the user has chosen a
> fill/stroke combination with low contrast. However, the cost seems rather
> high with only about 1sec launch time improvement and twice as much code to
> maintain.
>
> Quick question about your second version (I couldn't quite grok my way
> through the patch). Are you 1) fading both the grey and the colour versions
> of the image so that as one becomes opaque, the other becomes transparent;
> or 2) drawing one in the background always as an opaque fill, and then just
> pulsing the other over the top from opaque to transparent? In my code (non
> Sugar) I find the latter choice keeps code to a minimum, is more efficient,
> and visually looks cleaner (avoids the white background leaking through
> during part of the cycle).
>
> Here's a quick video if I didn't describe the above effect well enough
> (middle is alpha fading both images, right is the simple case of a single
> fade in/out for comparison, and left is using the monochrome image as an
> opaque background fill while drawing the colour image over the top with an
> alpha puse):
>
>        http://youtu.be/LLsqjGWBMfQ
>
> Regards,
> --Gary
>
> > The patchs are:
> >
> >
> http://dev.laptop.org/~gonzalo/alpha-pulsingicon/0001-Add-alpha-to-icon-and-secondary-buffer-to-implement-.patch
> >
> >
> http://dev.laptop.org/~gonzalo/alpha-pulsingicon/0001-Do-startup-animation-using-alpha-scale-and-a-seconda.patch
> >
> > If you want test in one XO can use the files in the directory
> pulse-doublebuf in the files_animation.zip
> >
> > I want include this in 0.94, thoughts?
> >
> > Gonzalo
> >
> > _______________________________________________
> > Sugar-devel mailing list
> > Sugar-devel at lists.sugarlabs.org
> > http://lists.sugarlabs.org/listinfo/sugar-devel
>
>
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