Video of Qt 4.4 on Neo1973: brings iPhone like graphics

[Carsten Haitzler (The Rasterman)]

On Wed, 23 Apr 2008 18:28:40 +0200 thomasg <thomas at gstaedtner.net> babbled:

yup. those 7m/sec (that's write to video ram) is also shared with SD card IO.
7m/sec for VGA graphics is not much. QVGA is 1/4 the pixel count of VGA. this
will be slower on the gta02 than gta01. gta01 get you about 43m/sec to video
memory. xglamo only accelerates a small subset of 2d operations and no 3d. 3d
itself is very limited even if we did it - it would be QVGA only for starters.
256x256 max texture size also isn't very useful.

so as such if you are reading data from SD CARD and doing graphics - it will be
problematic - likely SD card IO will lose out big-time.

> I guess the problem is, that the samsung s3c doesn't have enough interfaces
> for all the hardware freerunner has.
> So the Glamo ended up on the SDIO-port (used for the SD-slot in gta01), and
> the SD-slot is no connected to the glamos own SD-interface.
> 
> On Wed, Apr 23, 2008 at 6:20 PM, christopher bradski <
> chris.bradski at gmail.com> wrote:
> 
> > Just curious how the gfx chip ended up sharing the same bus as the
> > sd-slot? How slow would a video be on this device? Ie. Would a downcoded
> > video be watchable since the freerunner has more available memory and cpu
> > power available to do software decoding?
> > Sent via BlackBerry by AT&T
> >
> > -----Original Message-----
> > From: Ian Stirling <OpenMoko at mauve.plus.com>
> >
> > Date: Wed, 23 Apr 2008 16:54:02
> > To:List for Openmoko community discussion <community at lists.openmoko.org>
> > Subject: Re: Video of Qt 4.4 on Neo1973: brings iPhone like graphics
> >
> >
> > James Olney wrote:
> > > looks nice, obviously the freerunner with it's improved hardware and
> > > grfx chip will really start to shine.
> >
> > Unfortunately, not quite obviously.
> > For example, the memory bus bandwidth to the GPU is some 7M/s, compared
> > to 60+M/s for the GTA01, and the 3D hardware will not have drivers.
> >
> >
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> 


-- 
Carsten Haitzler (The Rasterman) <raster at openmoko.org>