Bug#632031: convert: gray colorspace creates broken postscript
On Thu, Jun 30, 2011 at 11:59 AM, Christoph Nodes <nodes@bfw-online.de> wrote:
> On Thu, 30 Jun 2011 11:21:02 +0200
> Bastien ROUCARIES <roucaries.bastien@gmail.com> wrote:
>
>> With your patch even exact double like 1.0e0 are rounded up !
>
> Right, thats exactly the problem we have with the our printf and
> imagemagick: we always print the next greater representable double,
> which in case of 1.0e0 and %.20g is ~1.000000000000000222.
>
> Surely, it would be smarter to only do this for "critical" numbers like
> ~0.354999, for which we ASSUME that actually 0.355 is meant, but how
> would you do that? There are no means to distinguish between 0.355 and
> ~0.354999 because they both are represented by the same floating-point
> number.
The patch on glibc bugzilla will do that, when truncating it will
print that you want
Bastien
>
>
> Best regards,
> Christoph
>
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