Re: [E-devel] [evas] Add RGBA -> grayscale 64 entries palette conversion

[Carsten H. (T. R. <ra...@ra...>]

On Mon, 17 Aug 2009 20:02:48 +0700 Mikhail Gusarov <dot...@do...>
said:

> 
> Twas brillig at 09:46:47 17.08.2009 UTC-03 when bar...@pr... did
> gyre and gimble:
> 
>  GSB> Fine ebooks won't go with movies and animations,
> 
> They will. New technology for bi-stable screens, which allows several
> dozens of fps and 4096 colors, is expected to be available for
> production next year. This means months of battery life while just
> reading books, and movies (battery usage like modern PDAs) when
> necessary.

4096 colors? well there's  the rgb16-444 - this is specifically for displays
using rgb565 as the rgb format but with only 4 bits per rgb (thus dithering
appropriately). but for dozens of fps.. really? will updates look good?

(nb- video decode uses quite a few transistors - even though you save on
backlight - you likely pay a price doing transitions for the screen and you are
still paying the decode, cpu, ram etc. price while it plays - so u'll probably
end up getting no different playback times as u would with an lcd - if the cost
of transitions is the same as a backlight. if the transition/update cost is
lower if almost 0, then u may get 2x - maybe 3x the playback compared to lcd...
now AMOLED may be on-par... :))

>  GSB> but does not hurt to same some cpu/memory and thus battery if
>  GSB> possible.
> 
> Yes, of course.

:)

>  GSB> As for dithering, topic that got lost... have you thought about
>  GSB> it? I guess it could improve perceived look and feel on such
>  GSB> low-depth high-res displays.
> 
> Actually we had to disable dithering earlier - it created a sort of
> unpleasant artifacts and nobody wanted to investigate why.

really? nasty. wow. is it possible someone has a photo of it with dithering?
one zoomed out and a macro-focus zoomed in one so i can see the pixels in
detail? maybe i can spot what's up? maybe not, but gstavo does bring up a very
good point. dithering should improve things a LOT. of course if done right.
maybe its an algorithm problem? is it possible to get a framebuffer shot too?

>  GSB> /me wonders when it will be possible to buy EFL ebook readers =)
> 
> Hanvon N516, Hanlin V3/V3ext. See the
> http://openinkpot.org/wiki/Hardware. The rest is coming, we just need
> more Linux kernel hackers to port the kernel to new devices.
> 
> N516 as sold by Urkainian reseller under Azbooka 516 name will have
> OpenInkpot preinstalled (completely free software firmware, starting
> From bootloader!), other N516s and V3 need reflashing.
> 
> -- 
>   http://fossarchy.blogspot.com/
> 


-- 
------------- Codito, ergo sum - "I code, therefore I am" --------------
The Rasterman (Carsten Haitzler)    ra...@ra...