[Libdlo] DirectFB support?

[Tim Stowell]

Hi,

Thanks for the link, you have a good point I guess I should just go
for the "bare metal" and code against libdlo directly :)

>
> 266 MHz is NOT "very slow"!
>

I meant 266 mhz is relatively very slow compared to a modern pc. All I
know is if I use a bmp file instead of a jpeg I save around 5-6
seconds of processing time so I know I'm cpu bound at some point. My 2
ghz laptop displays the image basically instantaneously, but that's
not what will be permanently hooked up to the display link device.

To answer your questions, I'm not scaling the jpeg, it's 1920x1080
dimensions-wise. I'm trying to get an HD size image on my flat-panel
tv. Thanks again for the help

-Tim

On Tue, Dec 21, 2010 at 1:54 PM, Phil Endecott
<spam_from_libdlo at chezphil.org> wrote:
> Hi Tim,
>
> Tim Stowell wrote:
>>
>> My main use case at this point is trying to find the fastest way to
>> get an image on the udlfb screen. I've tried the following (this is on
>> a very slow Soekris net4801 266mhz processor attempting to display a
>> jpeg)
>
> 266 MHz is NOT "very slow"!
>
>> My next question is assuming I have access to the image data, what is
>> the fastest way to display it with udlfb, mmap?
>
> Do you need to use udlfb?  Your fastest option on a CPU-limited system will
> probably be to use as few software layers as possible between you and the
> hardware.  I suggest using libdlo and libjpeg to do everything in
> user-space.  I posted some code to do this for SVG here:
>  http://lists.freedesktop.org/archives/libdlo/2009-May/000060.html - you
> could do something similar using libjpeg.
>
> (How large are your jpegs?  Are you scaling them, or anything like that?)
>
>
> Regards,  Phil.
>
>
>
>
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