Re: [boost] GIL Image Processing Library - Fusion and TinyVector

From: Ullrich Koethe (koethe_at_[hidden])
Date: 2006-10-19 10:04:28

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
-- 
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