[Scilab-users] Scilab-users] v6.0.2 jpeg export problem - again

[Samuel Gougeon]

Hello,

This bug is already reported for almost 6  years 
<http://bugzilla.scilab.org/12788>. It is not proper to the jpg format.
It occurs with all pixmap formats. It was fixed for onscreen rendering
(proving that it's not a pure driver issue), but it is still pending when
exporting graphics <http://bugzilla.scilab.org/14264>. Even when 
exporting graphics, in some circumstances,
it works. For instance, compiling some help pages generating some images
illustrating examples most often works, with right colors.
Please see details of the reports.

Regards
Samuel

PS : Please don't expect improvements from anyone else than the community,
that's to say yourself or your ability to find, convince and enrole 
contributors
around you or with you able and ready to contribute, noticeably to fix bugs,
noticeably long-standing ones. Thanks.

Le 12/04/2019 à 09:15, Dang Ngoc Chan, Christophe a écrit :
> Hello Marko,
>
>> De : users [mailto:users-bounces at lists.scilab.org] De la part de marko
>> Envoyé : jeudi 11 avril 2019 20:34
>>
>> Well, I'm certainly a newbie here. One thing I cannot seem to correct is that
>> graphic window / export / jpg always fails to produce an acceptable image.
>> As it has been pointed out in the past, the background is invariably pinkish,
>> while *.png works just fine.
> I could reproduce the problem.
> Typing "jpeg" in Bugzilla, the problem does not seem to be reported yet :
> http://bugzilla.scilab.org/buglist.cgi?quicksearch=jpeg&list_id=52325
> I suggest you fill in a bug report.
>
>> The suggestion in previous dismissals of this problem make the claim that it is
>> "ALWAYS" a video card driver problem
> In the bug report, you can include useful information from getdebuginfo() e.g. :
>
> [a, b] = getdebuginfo()
>   b  =
>
> ... []
>
> !                                                                         !
> !Operating System: Windows Seven x64                                      !
> !                                                                         !
> !Intel(R) Xeon(R) CPU E5-1620 v3 @ 3.50GHz                                !
> !                                                                         !
> !Number of processors: 8                                                  !
> !                                                                         !
> !Number of Video cards: 1                                                 !
> !                                                                         !
> !Video card #0: NVIDIA Quadro K2200                                       !
> !                                                                         !
> !Primary Video card driver version: 9.18.13.4105                          !
> !                                                                         !
> !Screen size: 1920 x 1200 32 bits                                         !
> !                                                                         !
> !Number of Monitors: 1                                                    !
>
> ... []
>
> However, JPEG is designed for photographs with subtle shades
> and not for graphics with very few colours such as those produced by a plot in Scilab.
>
> Of course this is not an excuse for the bug
> but I suggest you stick with the PNG or SVG formats.
>
> Regards
>
> --
> Christophe Dang Ngoc Chan
> Mechanical calculation engineer
>
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