On Sat, 9 Feb 2008 19:38:29 -0800 (PST) Asheesh Laroia <[EMAIL PROTECTED]> babbled:
> On Sun, 10 Feb 2008, Stroller wrote: > > > On 8 Feb 2008, at 23:42, Clarke Wixon wrote: > > > >> Michael 'Mickey' Lauer <[EMAIL PROTECTED]> writes: > >> > >>> ipkg install gpe-gallery. > >> > >> . . . which works, but is s-l-o-w when reading 8 megapixel digicam > >> pictures, for > >> example. Probably with sanely-sized pictures it would be quite a bit > >> better. > > > > Please excuse me if this is a naive question, but isn't any image viewer > > going to be slow, dealing with 8 megapixel pictures, running on a 200mhz > > - 400mhz processor? > > Not to mention eight megabytes of I/O from the micro-SD slot. I don't > have my Neo on-hand, but it'd be great to see some performance numbers > that can indicate what sort of performance is reasonable to expect. actually 8mpixel jpegs normally are about 2-4mb for file IO. as for resizing, you can actually get resize for free on load with jpeg just by decoding a subset of the DCT info - the load is actually sped up by a fair margin. this is easy. so you can resize an 8mpixel image (3246x down to 405x306) AND load it much faster than only loading the 8mpixel image on its own. :) > > I'd guess that the GPU's hardware might be used to accelerate image > > resizing in GTA02, but ... > > > > IMO you might be better off writing a bash script on your main machine > > that uses ImageMagick to resize the images, then copy them across. > > Yes - and in fact, JPEG supports embedded thumbnails that should not even > require you to read the whole image as I feared is the major time sink > (and certainly not require you to actually decode the whole image). that's possible if the exif data is still there. the above is a generic solution that works for all jpeg images though. :) as i said - it also is supported by libjpeg - and is exported and made easy by libraries such as epeg and evas :) (evas has load options where u can request downscaling of images at load time. if it is possible to do the loader will do it and with jpeg it comes "for free" on load - in fact speeds sup the load). > -- Asheesh. > > -- > Start the day with a smile. After that you can be your nasty old self again. > -- Carsten Haitzler (The Rasterman) <[EMAIL PROTECTED]>
