[Gimp-developer] still the same bug

[gg at catking.net]

On Tue, 01 May 2007 18:08:35 +0200, William Skaggs  
<weskaggs at primate.ucdavis.edu> wrote:

>
>
> From: "Luis A. Florit" <gimpdevel at luisflorit.endjunk.com>
>
>> For Bill:
>> [...]
>>
>> Well, I am really tired about reporting bugs at Bugzilla
>> and not even getting an answer, specially for Fedora bugs.
>> [...]
>
> Fedora maintainance sucks.  Please don't judge GIMP's bug handling
> by Fedora.
>
>> For gg:
>>
>>> I suspect it got ignored since one pixel offset errors are pretty
>>> much to be expected.
>>
>> ???!!!
>> Well, now this answer was indeed unexpected!
>> For me this kind of bugs is enough reason to never use a program!!!
>> You cannot apply a filter with masks if it has shifts!
>
> As I wrote before, you are quite correct, and gg is wrong here.
> Rounding errors are to be expected every so often, although they
> should be fixed when they are found if possible, but a systematic
> 1-pixel offset in a filter is a serious bug that must be fixed.
>
>   -- Bill
>

Since everyone seems to quoting what I wrote but only reading half of the  
sentence I probably should explain what I meant.

Please note the "I suspect it got ignored since". As Bill says here  
systematic offsets are a bug that should be fixed but random rounding  
errors are unavoidable in many cases. That means they should be random ie  
in both directions and not trucations errors always in one direction or a  
definite pixel offset.

There is an underlying issue where both origin and offset of a region are  
stored as gint before any processing is done. This means two rounding  
and/or trucation errors can easily end up producing a one or two pixel  
error.

I'm rather surprised that anyone following this list should mistake my  
position since I have been quite critical of just this kind of point, even  
in the last 7 days.

Now Luis has given a specific case and replied to my request for the  
filter settings needed to reproduce it, it seems to be getting the  
attention he felt it missed last time.

gg