[Pkg-gmagick-im-team] Bug#848849: closed by Bastien ROUCARIÈS <roucaries.bastien+debian at gmail.com> ([imagemagick] wontfix)

[Bastien ROUCARIES]

On Mon, Jan 2, 2017 at 1:28 PM, Eduard Bloch <edi at gmx.de> wrote:
> Control: reopen 848849
>
>> It is really hard from a pipe to guess the type of file.
>
> Huh?
>
> It has been possible and has been working fine (from user POV) for
> years. Even the oldest version I can access right now (Ubuntu 14)
> works this way.
>
> And if this is a deliberately introduced regression then I expect you to
> announce such things via the NEWS file.
>
>> XWD magic is only 3 bytes and better error handling need seek that are not
>> available on pipe (stdin).
>
> This is not really an explanation. Are you trying to say that previously
> they did the detection in later stages when more data was available and
> now this happens in the beginning, within the first read package or
> something? In which case... why not increase the size of the first read
> package to get enough data?
>
>> Using file more information could be given using file extension.
>
> Huh?
>
> There is no suffix, it's a stream. You probably mean "-format xwd"?
> But even that workaround is broken:
>
> $ xwd -root | convert -format xwd - deleteme.png
> convert-im6.q16: no decode delegate for this image format `' @ error/constitute.c/ReadImage/504.
> convert-im6.q16: no images defined `deleteme.png' @ error/convert.c/ConvertImageCommand/3258.
>
> And this also was ok with older version.
No i mean

  xwd -root | convert xwd:-
>
> Regards,
> Eduard.
>