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Amiga News and Community Announcements => Amiga News and Community Announcements => Amiga.org site announcements => Topic started by: on May 17, 2003, 10:11:10 AM

Title: jpeg datatype
Post by: on May 17, 2003, 10:11:10 AM

hi,

just did a check and it seems that ibrowse show jpg pics about 5 times faster than multiview. took about 20 secs of waiting before multiview build up a 1024*768 jpg. Ibrowse did it few secs.
Anybody know whats happenin here???

Thanks in advance
P

Title: Re: jpeg datatype
Post by: futaura on May 17, 2003, 11:08:03 AM

Quote

ust did a check and it seems that ibrowse show jpg pics about 5 times faster than multiview. took about 20 secs of waiting before multiview build up a 1024*768 jpg. Ibrowse did it few secs.
Anybody know whats happenin here???

You don't give any information about your system spec, so I can only guess...  Presumably you have a graphics card and no PPC?  If you are using OS3.9 and a 15/16/24-bit display, you could try loading up the "PictDT" prefs program, and disable the "Dither HiColour" option.  Normally picture.datatype dithers images, even for hi/true colour displays.  Dithering can use the PPC which is quite fast, but still this does cause a delay, and if you don't have a PPC then the delay will be much greater of course, and could well explain why you're seeing a speed difference.  Of course, IBrowse is built for speed and doesn't really have a need for outputting superior image quality on hi/true colour displays by using dithering, where the difference is negligable.

Also, which JPEG datatype are you using?  I would suggest WarpJPEG (http://www.nanunanu.org/~oliver/warpjpeg.html), obviously :-).  WarpJPEG has a number of options affecting speed/quality trade-offs.  If you're still using OS3.5, you can turn the dithering off via WarpDTPrefs, since you can't turn it off with the PictDT prefs like you can with OS3.9.

Title: Re: jpeg datatype
Post by: on May 17, 2003, 11:56:16 AM

thanks,
i tried installing that but it asks me which version to install : for the ppc it shows warp and morph os. The mig however is equipped with a 604/2somethingMHz, but Im running plain 3.9.1. No warp or morph os. so what should I select here?

Many thanks
P

Title: Re: jpeg datatype
Post by: kolla on May 17, 2003, 01:26:13 PM

So, you're saying you have a PPC but do not use it  :-D

Title: Re: jpeg datatype
Post by: on May 17, 2003, 01:50:29 PM

quess so...
?

Title: Re: jpeg datatype
Post by: on May 17, 2003, 04:12:31 PM

well,
found the warpos package
istalled it and even 2.5mb bmp load
within a sec

Many thanks