Hello Philippe <[EMAIL PROTECTED]>
on 29-Apr-99, you wrote:
PT>> Maybe OS3.5 will have a good basic selection. But why not just support
PT>> the three image formats which are standard on the web? That is already
PT>> too many IMO. And why would loading IFFs be quicker than GIFs?
PT>>
PT> without a graphic card it makes sense to say IFF is quicker to display
PT> than GIF, it was the purpose of this format:
PT> the lines in a iff are interlaced (as the name suggest), so positionning
Whow... you're getting something completely wrong here.
IFF pictures in general are NOT interlaced. Some are, but that depends.
The speed difference comes from the different compressing algorithms.
As far as I know, IFF (what BTW, means* Interchange* File Format, not
*Interlaced* File Format) uses Run Length Encoding, while GIF, as we all know,
uses LZW-compression (or something similar) which takes much longer to
decompress.
But, on an up-to-date system (a 1200/030 w/o GFX card is not one), let's say
a 040 or 060 should decompress GIFs and IFFs in "realtime". I never had
problems with speed with GIF, I didn't recognize any decompressing time.
And, if it's 0.002 seconds or 0.005 seconds, I don't care.
I guess, using IFFs for local storage/cache would not be faster on fast
systems because the loading time difference of the bigger file would be longer than
the time won through faster decompression.
PT> modulo, you can display the picture directly,
PT> setting a plane pointer to one line.
PT> And most of the amiga graphics software support at least IFF (often many
PT> other formats too anyway, but always iff)
Supporting IFF because it's so easy to use with non-GFX-card systems is
stupid. *Every serious Amiga user* owns a GFX board nowadays.
And *every serious graphics software* supports GIF, PNG and JPEG.
Regards
--
Andreas Frank
EMail: [EMAIL PROTECTED]
Web: http://www.mediaspace.net/kolb
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