Pretty UI for OpenMoko
Денис Парченко
cray at hotbox.ru
Sat May 26 16:28:40 CEST 2007
>>
>>>> I have estimated memory bandwidth in following way:
>>>>
>>>> 480 (width) *
>>>> 640 (height) *
>>>> 3 (bytes per pixel, not sure) *
>>> It's 2
>>>> 25 (fps) == 23040000 bytes/s (22Mb/s)
>>>>
>>> 60 fps however.
>>
>> What kind of FPS is that 60? Display refresh rate?
> Yes, the native refresh of the LCD is 60Hz.
Then it appears that we need 35Mb/s (480 * 640 * 2 * 60) for just
viewing picture on display? Sad :(
Simple two-layer fullscreen animation will need 26Mb/s (480 * 640 * 2
* 3 * 15),
where 3 == 1 (read back layer) + 1 (read front layer) + 1 (write result)
35 Mb/s + 26 Mb/s == 61 Mb/s
And what bandwidth can neo provide?
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Best regards,
Denis
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