Ubuntu
inkscape package

Running Inkscape repeatedly by script causes X to use lots of CPU

Bug #87009 reported by Bruce Cowan on 2007-02-22

Affects		Status	Importance	Assigned to	Milestone
	inkscape (Ubuntu)	Invalid	Undecided	Unassigned

Bug Description

Binary package hint: inkscape

Running the tiles@home script for OpenStreetMap from http://trac.openstreetmap.org/browser/utils/tilesAtHome calls inkscape to render SVG files without the GUI of Inkscape being loaded. This results in a very unresponsive X, as it uses lots of CPU time. This script didn't cause this issue in Edgy.

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Kees Cook (kees) wrote on 2007-02-22:

Thanks for this bug report! Can you provide some details on how to run the script, etc, so that we can reproduce the problem you're seeing? I haven't used OpenStreetMap before, so I'm unsure how to duplicate the bug.

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Bruce Cowan (bruce89-deactivatedaccount) wrote on 2007-02-22:

Yes, it is a little difficult to explain. The script won't work if you don't have an OSM password, so there is not much chance of running it elsewhere. I'll ask the developers of the script itself for advice.

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Deelkar (deelkar) wrote on 2007-02-23:

I'm one of the devs on the script.
It basically downloads a set of map data in XML format, transforms this into a (rectangular) svg and then inkscape is used to export these svgs as square 256x256 truecolor pngs.

On a sidenode: why does inkscape try opening a DISPLAY at all when in batch mode?

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Deelkar (deelkar) wrote on 2007-02-23:

svg zoom 14 osmarender Edit (982.5 KiB, image/svg+xml)

Added example svg

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Deelkar (deelkar) wrote on 2007-02-23:

example command lines run on a tileset:

...at zoom level 12 (squere png as mentioned above)

nice "inkscape" -w 256 -h 256 --export-area=0.000000:0.000000:878.910000:877.628239 --export-png="./tile_12_2148_1332.png" "./output-27352-z12.svg"

...at zoom level 14 (the script renders map tiles from z=12 to z=17)

nice "inkscape" -w 1024 -h 256 --export-area=0.000000:658.221179:878.910000:877.628239 --export-png="./tile_14_2148_5328.png_part" "./output-27352-z14.svg"

the png_part is then cut up to 256x256 px pngs by libgd.

I included the zoom 12 call so you can see better that there is some (intended) deformation going on (getting square tiles with simple mercator projection from rectangular svg area).

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Bruce Cowan (bruce89-deactivatedaccount) wrote on 2007-02-28:

I no longer see this with an up to date Feisty with the newest version (r2187 "Athens") of the script, sorry to bother Ubuntu with this "bug".

Changed in inkscape:
status:	Unconfirmed → Rejected

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Deelkar (deelkar) wrote on 2007-03-01:

This might be related to the upstream bug on sf.net
https://sourceforge.net/tracker/?func=detail&atid=604306&aid=1670475&group_id=93438
as OSM data suffers from occasional bad UTF-8 characters.
When Inkscape encounters those it will allocate all available RAM in order to process it, and because that fails, crash.