[Qgis-developer] Re: Symbol pattern scaling issues: raster versus vector pdf

[Marco Hugentobler]

Hi John

I also tried it today and applied the modification of ticket 5114 to Qt 4.6.2 
And it works for me now with vector pdf.

But I forgot to mention that it only works with svg fill in new symbology. So 
if you are using the normal hardcoded polygon fills, it will not work (because 
they are rasters and will appear pixelated in the print). However, you could 
generate svg files with similar patterns.

Regards,
Marco

Am Mittwoch, 31. März 2010 23.03:05 schrieb John C. Tull:
> Hi Marco,
> 
> I tested with qt-4.7 preview code. The patch had not been applied, so I
>  patched it, compiled, etc. Unfortunately, the symbol scaling problem was
>  not resolved. Additionally, svg symbols in the legend were being misplaced
>  when I printed a vector pdf file.
> 
> Using the untouched 4.7 preview code, the offset problem with the legend
>  icons was fixed. The oversized dot pattern fill was still present.
> 
> So this does not appear to be the solution to the problem with polygon
>  pattern fill issues.
> 
> Regards,
> John
> 
> On Mar 30, 2010, at 12:01 PM, Marco Hugentobler wrote:
> > Hi John
> >
> > The vector scaling issue in (vector) pdf is a bug in Qts pdf paint
> > engine:
> >
> > http://bugreports.qt.nokia.com/browse/QTBUG-5114
> >
> > But now there is a patch for it in the qt bugtracker. So hopefully it is
> > fixed in the newer versions (or you could apply the small modification in
> > the ticket if you have a 4.5).
> >
> > Regards,
> > Marco
> >
> > Am Dienstag, 30. März 2010 17.59:59 schrieb John C. Tull:
> >> Hi Marco,
> >>
> >> I assume you saw the bug I filed the other day on this:
> >> https://trac.osgeo.org/qgis/ticket/2598
> >>
> >> I wanted to follow up with you because exporting to vectorized pdf seems
> >> to be a possible workaround for the strange polygon fill/shading bug
> >> that occasionally crops up for me (recall our communication and the
> >> screenshots from the hackfest). For projects that have the fill problem,
> >> exporting to pdf as a vectorized pdf file avoids the fill problem.
> >> Unfortunately, the issue with symbol fill pattern differences arises, as
> >> described in the bug report.
> >>
> >> I'm hoping there is a simple solution to this problem. Otherwise, I am
> >> at a loss for creating printable, high-quality maps in qgis for many of
> >> my projects.
> >>
> >> Regards,
> >> John
> 

-- 
Dr. Marco Hugentobler
HUGIS GmbH
Webereistrasse 66
CH-8134 Adliswil
marco at hugis.net
http://homepage.hispeed.ch/hugis
Technical Advisor QGIS Project Steering Committee