[SCIFIO] reuse reader for files of same format

[Mark Hiner]

Hi Michael,

  This definitely should work. The Metadata attached to a Reader should
determine the image dimensionality, and the Metadata should be re-parsed
automatically when setting the source.

 Oh.. but looking at the source, the PNG reader has state (it remembers the
last plane it read. So if the reader was stateless (which it's supposed to
be) it should work. I'll just have to make a pass through the formats and
remove any state from the readers, or if that's not possible I'll make sure
they reset properly when calling setSource.

Thanks for pointing this out,
Mark


On Mon, Aug 26, 2013 at 7:13 AM, Michael Zinsmaier <michael.zinsmaier at gmx.de
> wrote:

> Hi together,
>
> is it possible to use the same reader for multiple files of the same
> format?
> I want to read e.g. 10  .png files that may differ in their dimensionality
> but use all the same format and encoding can I reuse a reader instead of
> doing the potentially expensive format tests for each file. We tried it
> naively with reader.setSource which somehow works but
> dimensionality and size data is not rediscovered => the reader tries to
> load all images with the same size.
>
> Is their a better way to do this?
> (We still want to use the format discovery for the first image but assume
> for all others that they have the same format.)
>
> Best Regards Michael
>
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