Exception "The SVG size is undefined" raised using svg2png

[vincentfpgarcia]

Converting the following SVG file (see code bellow) into a PNG caused an exception to be raised:

Traceback (most recent call last):
  File "/Volumes/Test/main.py", line 12, in <module>
    cairosvg.svg2png(url=URL, write_to=OUTPUT_PATH)
  File "/Volumes/Test/venv/lib/python3.12/site-packages/cairosvg/__init__.py", line 55, in svg2png
    return surface.PNGSurface.convert(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Volumes/Test/venv/lib/python3.12/site-packages/cairosvg/surface.py", line 133, in convert
    instance = cls(
               ^^^^
  File "/Volumes/Test/venv/lib/python3.12/site-packages/cairosvg/surface.py", line 225, in __init__
    self.draw(tree)
  File "/Volumes/Test/venv/lib/python3.12/site-packages/cairosvg/surface.py", line 472, in draw
    self.draw(child)
  File "/Volumes/Test/venv/lib/python3.12/site-packages/cairosvg/surface.py", line 472, in draw
    self.draw(child)
  File "/Volumes/Test/venv/lib/python3.12/site-packages/cairosvg/surface.py", line 480, in draw
    paint_mask(self, node, mask, opacity)
  File "/Volumes/Test/venv/lib/python3.12/site-packages/cairosvg/defs.py", line 145, in paint_mask
    mask_surface = SVGSurface(mask_node, None, surface.dpi, surface)
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Volumes/Test/venv/lib/python3.12/site-packages/cairosvg/surface.py", line 209, in __init__
    raise ValueError('The SVG size is undefined')
ValueError: The SVG size is undefined

Here is the code to reproduce:

import cairosvg

URL = "https://upload.wikimedia.org/wikipedia/commons/3/32/Saltwater_Limpet_Diagram-en.svg"
OUTPUT_PATH = "output.png"
cairosvg.svg2png(url=URL, write_to=OUTPUT_PATH)

[liZe]

Thanks for the bug report.

This bug happens because the SVG includes useless masks and filters with width/height set to 0. This could be possible to support these masks (and filters, markers, etc.) by ignoring them when they have no width or no height.

Here’s what I get if I remove these useless masks: