[QGIS-Developer] Problems with text when exporting to SVG from composer

[Pierson Julie]

Hi all,

Some months ago there was a discussion 
<https://discourse.osgeo.org/t/qgis-fr-user-ameliorer-lexport-svg-de-qgis/274/11> 
on the french qgis user group about problems with svg export in QGIS. 
This is a follow-up to this discussion but centered on text, because it 
seemed better to start with a more "focused" problem :-) For a bit of 
context my colleague Nelly Martin and myself would like to help improve 
QGIS export to SVG to help other colleagues (and ourselves !) switch to 
QGIS. We're aware that QGIS has great possibilities to make maps, but 
for a lot of people editing GIS output in vector graphic editors 
software like Adobe Illustrator, Affinity Designer, or Inkscape is part 
of their workflow.

So this is an attempt to group multiple issues with text and SVG export. 
Maybe this can help to see if these multiple bugs have the same source ?

1. *Text gets exported as separated lines or separated letters :* when 
exporting multi-line text, each line gets exported as a distinct text 
element. When exporting curved label, each letter gets exported as a 
distinct element as well. This is documented in issue 24639 
<https://github.com/qgis/QGIS/issues/24369>. There is also an older 
issue documenting an inverse problem when importing into QGIS a SVG with 
multi-line text created in Inkscape : issue 11856 
<https://github.com/qgis/QGIS/issues/11856>.

2. *Wrong font size :* when setting a font size of 10pt in QGIS for some 
text and exporting to SVG, and opening SVG in Inkscape, Affinity 
Designer,  or Adobe Illustrator, font size is 10.07747412 pt. This is 
documented in issue 49761 <https://github.com/qgis/QGIS/issues/49761>.

3. *Wrong font :* exported SVG do not always use correct fonts, simple 
fonts are ok but more complicated one are not. This is documented in 
issue 47017 <https://github.com/qgis/QGIS/issues/47017>.

4. *Wrong character :* minus character gets exported as a dash, this is 
documented in issue 44444 <https://github.com/qgis/QGIS/issues/44444>. 
Perhaps other characters get exported wrongly as well ?

As I understand it, these bugs are not QGIS-related but stem from Qt. In 
the initial discussion in the french list, Régis Haubourg and Julien 
Cabieces mentioned that KDAB could be a good interlocutor for Qt 
developments (thanks again Régis and Julien for your answers !).

Would this problem be eligible for a QGIS grant, even if this is not a 
QGIS development ? Or do you have any idea how to have a go at this ? We 
haven't found any funding source for now, but we keep looking ! In the 
meantime having input from the QGIS community on this would be valuable.

Thanks a lot for your input ! Have a nice day,

Julie & Nelly.

-- 
Géomaticienne
UMR 6554 LETG
tel 02 98 49 86 81
Institut Universitaire Européen de la Mer
29280 Plouzané
https://letg.cnrs.fr/
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