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From: Ullrich Koethe (u.koethe_at_[hidden])
Date: 2001-11-15 14:59:28
Peter Dimov wrote:
>
> From: "Ullrich Koethe" <u.koethe_at_[hidden]>
> > BTW, what's your image library doing? Is it also public?
>
> To reply to the specific question:
>
> Currently I focus on operations relevant to computer games. These include
>
> * import/export (you've got this covered)
>
Yeah, but it isn't nice. I could use some help here...
> * resampling
>
I have interpolation, but ot is optimized more for quality than speed.
General affine transformations are on the schedule.
> * copy (as fast as possible) image A onto image B at point (x, y) using
> effect E (additive blend, alpha blend, multiplicative blend... like the
> photoshop layer effects)
>
This would be the realm of a lambda library. VIGRA comes with a
lightweight one (did I mention this ?)
> * (quickly) convert image A to the specified packed-pixel format, like 555
> RGB.
>
I would use an accessor here.
> * crop image A leaving only the parts where the alpha channel is not zero.
>
In VIGRA, you need not physically crop. Just move the iterators inwards
by the right amount, so that only the interesting rectangle is
processed.
Ulli
-- ________________________________________________________________ | | | Ullrich Koethe Universität Hamburg / University of Hamburg | | FB Informatik / Dept. of Computer Science | | AB Kognitive Systeme / Cognitive Systems Group | | | | Phone: +49 (0)40 42883-2573 Vogt-Koelln-Str. 30 | | Fax: +49 (0)40 42883-2572 D - 22527 Hamburg | | Email: u.koethe_at_[hidden] Germany | | koethe_at_[hidden] | | WWW: http://kogs-www.informatik.uni-hamburg.de/~koethe/ | |________________________________________________________________|
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