patternTransform difference with librsvg

[adriaanmeuris]

Hi,

I’ve been investigating an issue in librsvg related to rasterizing SVGs that contain large translations in patternTransform. While exploring alternatives, I came across resvg, and I have to say—its performance and ease of use are truly impressive. Thanks for all the work on this project!

Given the original input SVG, resvg successfully rasterizes it at large output dimensions, which resolves the issue I encountered with librsvg.

However, I’ve noticed a slight discrepancy in pattern translation. When rasterizing with librsvg:

rsvg-convert input.svg -w 2000 -o output-librsvg.png

The output appears correct and aligns with how the SVG is rendered in Chrome, Firefox, and Safari. Using resvg:

resvg --width 2000 input.svg output-resvg.png

The result appears slightly shifted to the right:

librsvg	resvg

I’m uncertain whether the browser implementations are the definitive reference for correctness since opening the same SVG in Illustrator results in a completely shifted rendering (even though it was originally created in Illustrator 😁 ).

Given this inconsistency, I thought it would be valuable to report this case.

Let me know if any additional details would be helpful.

[RazrFalcon]

Yes, it's definitely a bit off. Not sure why. Might be related to #628