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Loading SVG fails for some files #1244
Description
Most appropriate sub-area of Processing 4?
IO ?
Processing version
4.4.7
Operating system
Windows/macOS/Linux
Bug description
Unable to load some SVG files, such as https://commons.wikimedia.org/wiki/File:Aiga_departingflights.svg you get something similar to:
ArrayIndexOutOfBoundsException: Index 43 out of bounds for length 43
Steps to reproduce this
-
Launch PDE, create a sketch, download https://commons.wikimedia.org/wiki/File:Aiga_departingflights.svg and add it to the
datafolder of your sketch. -
Run the snippet below:
void setup(){
size(500, 500);
PShape svg = loadShape("Aiga_departingflights.svg");
shape(svg); // will crash before this line...
}Additional context
This looks a bit like #750 but the "SVG path notation parsing issue" that causes it to fail seems different.
The provided failing SVG looks like this:
<svg xmlns="http://www.w3.org/2000/svg" version="1.0" viewBox="0 0 29 29">
<path d="m0 6 3-2 15 4 7-7a2 2 0 013 3l-7 7 4 15-2 3-7-13-5 5v4l-2 2-2-5-5-2 2-2h4l5-5z"/>
</svg>If you scale it a bit on Inkscape you get a different path notation and it works fine:
<svg xmlns="http://www.w3.org/2000/svg" version="1.0" viewBox="0 0 29 29">
<path d="m 0,5.9994379 2.9997,-1.9998 14.9985,3.9996 6.9993,-6.99930004 a 2.1211082,2.1211082 0 0 1 2.9997,2.99970004 l -6.9993,6.9993001 3.9996,14.9985 -1.9998,2.9997 -6.9993,-12.9987 -4.9995,4.9995 v 3.9996 l -1.9998,1.9998 -1.9998,-4.9995 -4.9995,-1.9998 1.9998,-1.9998 h 3.9996 l 4.9995,-4.9995 z"/>
</svg>Would you like to work on the issue?
No, I’m just reporting the issue
Activity
hxrshxz commentedon Oct 14, 2025
hey @catilac I would like to work on this can you assign it to me
catilac commentedon Oct 14, 2025
Hi @hxrshxz yeah that sounds good! Happy to assign it to you. Could you share what your approach will be for this?
hxrshxz commentedon Oct 14, 2025
hey @catilac Thanks for assigning this to me! My plan is to first replicate the ArrayIndexOutOfBoundsException. From there, I will debug the loadShape function, focusing specifically on the SVG path parsing logic to pinpoint the exact line of code and data causing the issue. Once I've identified the root cause which I think is a loop boundary or notation handling error I will implment a fix. after I am done I willl verify the solution not only with the original failing SVG but also with other standard SVGs just to be sure. Let me know if this approach sounds good
catilac commentedon Oct 14, 2025
sounds good! i'll check out your PR when it's ready :)