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Bug#632031: convert: gray colorspace creates broken postscript



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.


Best regards,
Christoph



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