[Haskell-cafe] Data.Vector with stride

[Carter Schonwald]

Hey niklas, I'll releasing an abstraction layer on top of vector soon
that'll have support for striding, and I definitely agree that such info is
key for easy interop



On Sun, Dec 15, 2013 at 9:42 PM, Mike Ledger <mike at quasimal.com> wrote:

> A quick and dirty way do have strides with Data.Vector.Storable might be
> to use a newtype around a type, and have its sizeOf be the stride.
>
>
> On Monday, December 16, 2013 1:13:50 PM, Niklas Hambüchen wrote:
>
>> For low-level performance, especially when dealing with images, pixel
>> buffers, camera devices etc, arrays can have a "stride" to align rows to
>> word boundaries.
>>
>> http://en.wikipedia.org/wiki/Stride_of_an_array
>>
>> Data.Vector does not support strides (as mentioned in
>> http://u.arboreus.com/2011/03/how-to-choose-haskell-array-library.html),
>> but it would be nice to have them, especially for Storable vectors and
>> interfacing with C imaging libraries.
>>
>> Is there a particular reason / difficulty that would go against an
>> implementation of a Data.Vector.Storable.Stride and the corresponding
>> generic vector instances?
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