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Bug 666477 - <tspan> x attribute not supported for explicit character positioning
<tspan> x attribute not supported for explicit character positioning
Status: RESOLVED OBSOLETE
Product: librsvg
Classification: Core
Component: general
2.34.x
Other Linux
: Normal normal
: ---
Assigned To: librsvg maintainers
librsvg maintainers
Depends on:
Blocks:
 
 
Reported: 2011-12-19 02:40 UTC by Brion Vibber
Modified: 2017-12-13 17:50 UTC
See Also:
GNOME target: ---
GNOME version: ---

Attachments
Sample SVG file: X-axis year labels run together, Y-axis labels are mispositioned (26.80 KB, image/svg+xml)
2011-12-19 02:40 UTC, Brion Vibber 		Details

Description Brion Vibber 2011-12-19 02:40:14 UTC 
Created attachment 203817 [details]
Sample SVG file: X-axis year labels run together, Y-axis labels are mispositioned

Downstream Wikipedia bug report: https://bugzilla.wikimedia.org/show_bug.cgi?id=33245

The attached file uses <tspan>'s 'x' attribute to specify explicit positions for each character in text labels on the graph. We use librsvg to rasterize PNG versions of SVGs on Wikipedia; currently deployed version (also tested 2.34.2 locally) doesn't appear to support this attribute and so lays the text out itself at what turn out to be incorrect positions.


Looks like the file is using a (possibly obscure) feature to lay out the
various characters at very specific locations:
http://www.w3.org/TR/SVG/text.html#TSpanElementXAttribute

which librsvg apparently doesn't support.

Example bit:

<tspan
           x="0 9.1193962 18.238792 27.358189 55.543907 64.663307 73.7827
82.902092 111.10436 120.22376 129.32661 138.446 166.64827 175.76767 184.88707
194.00645 222.19218 231.31158 240.43097 249.55037 277.75262 286.87204 295.99142
305.09427 333.29654 342.41595 351.53534 360.65472 388.85699 397.95984 407.07925
416.19864 444.51675 453.63617 462.75555 471.87497 500.15961 509.27899 518.39838
527.51776 555.70349 564.82288 573.94232 583.06171"
           y="0"
           id="tspan48"
          
style="font-size:16.55062866px;font-variant:normal;font-weight:normal;writing-mode:lr-tb;fill:#000000;fill-opacity:1;fill-rule:nonzero;stroke:none;font-family:Arial;-inkscape-font-specification:ArialMT">19801983198619891992199519982001200420072010</tspan>
Comment 1 Perhelion 2014-03-23 16:40:15 UTC 
duplicate of Bug 525023
Comment 2 Perhelion 2014-03-23 17:34:19 UTC 
Sorry, bug 525023 seems very unclear, all the given subsequent examples are fixed (with the exception of the first, which is also an instance of this here).
Comment 3 Perhelion 2014-03-23 19:57:14 UTC 
This also applies to the text element. The dy / dx attributes are also affected, see bug 517384.
Comment 4 GNOME Infrastructure Team 2017-12-13 17:50:44 UTC 
-- GitLab Migration Automatic Message --

This bug has been migrated to GNOME's GitLab instance and has been closed from further activity.

You can subscribe and participate further through the new bug through this link to our GitLab instance: https://gitlab.gnome.org/GNOME/librsvg/issues/56.