Joel de Guzman wrote:
VIGRA doesn't have an explicit RGBA type (TinyVector<T, 4> can be used instead), because so far no-one came up with a convincing proposal for these operations. But without them, RGBA is pretty useless.
Hmmm... TinyVector<T, 4>... I think VIGRA should use Fusion for that instead ;-)
I had a look at Fusion, but I'm not sure whether it would be helpful in this context. TinyVector is based on three design goals: it should support the std::vector interface (except for resize etc.), it should be fast (you have millions of these beasts in a single image), and it should behave like a built-in arithmetic type (except for division which is problematic because the zero vector is not the only one that may cause a division-by-zero error). Fusion may be more helpful in heterogeneous pixel types, but they often have very specific requirements that are perhaps better handled explicitly. RegardUlli -- ________________________________________________________________ | | | Ullrich Koethe Universitaet Hamburg / University of Hamburg | | FB Informatik / Dept. of Informatics | | 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@computer.org Germany | | koethe@informatik.uni-hamburg.de | | WWW: http://kogs-www.informatik.uni-hamburg.de/~koethe/ | |________________________________________________________________|