Imagemagick throws "width or height exceeds" when converting SVG to PNG with version 6.9.11-60 but not with 6.9.10-23

[q2apro]

ImageMagick version

6.9.11

Operating system

Linux

Operating system, version and so on

Ubuntu 22.04.3

Description

I have one server with Ubuntu 20.4 and ImageMagick 6.9.10-23.

The newer server is with Ubuntu 22.04.3 LTS and ImageMagick 6.9.11-60.

I upload a SVG file and want to convert it to PNG and resize it.

convert -format png -density 1200 -resize '255x255>' /folder/test.svg /folder/test.png

With the old server it works flawlessly.

The newer server with ImageMagick 6.9.11-60 throws:

convert-im6.q16: width or height exceeds limit /tmp/magick-IXLGAi-fnZE2OS1MPM_W1DzbcXjNnrdl @ error/cache.c/OpenPixelCache/3909.
convert-im6.q16: no images defined /srv/users/hessen/apps/edumaps/public/temp/temp.png @ error/convert.c/ConvertImageCommand/3229.

I have compared both /etc/ImageMagick-6/policy.xml files, they have the same settings. Only the old policy.xml states:

<policy domain="resource" name="area" value="128MB"/>

And the new one states:

<policy domain="resource" name="area" value="128MP"/>

I changed it to 128MB but still the same error message.

I also check with convert -list resource. The output is for both servers identical, just the old server states List length: 18.446744EP and the new server states List length: unlimited.

Resource limits:
  Width: 16KP
  Height: 16KP
  List length: unlimited
  Area: 128MP
  Memory: 256MiB
  Map: 512MiB
  Disk: 1GiB
  File: 768
  Thread: 64
  Throttle: 0
  Time: unlimited

Limits can be seen at the docs. But I use the same file on both servers.

The SVG file is 744 x 1052 pixels.

How to fix this problem?

PS: The problem is NOT the policy.xml - see https://stackoverflow.com/questions/77578848/imagemagick-throws-width-or-height-exceeds-when-converting-svg-to-png-with-ver

[snibgo]

Naming your input SVG as medienz.svg, your command:

magick -density 1200 medienz.svg info:

** (process:15860): WARNING **: 13:14:59.964: couldn't load font ""TwCenMT-Regular" Not-Rotated 6.9658203125", falling back to "Sans Not-Rotated 6.9658203125", expect ugly output.
medienz.svg SVG 18237x2837 18237x2837+0+0 16-bit sRGB 3590B 0.000u 0:00.000

... would give a width of 18237 pixels, but your limit in policy.xml is 16000 pixels.

[q2apro]

Wow. I am stunned.

Changed these lines:

  <policy domain="resource" name="width" value="16KP"/>
  <policy domain="resource" name="height" value="16KP"/>

to

  <policy domain="resource" name="width" value="32KP"/>
  <policy domain="resource" name="height" value="32KP"/>

Now it works. Thanks a thousand!

[fmw42]

When you do

convert -density 1200 test.svg x.png

you get and image of dimension 18238 × 2838

So you need a policy that allows for a width of 18238 and height of 2838 and area in pixels of 51,759,444 = 51.8 MP

Your policy is

Width: 16KP
Height: 16KP
Area: 128MP

So your width of 16KP = 16,000 is less than the needed width of 18,238

and your area is 128MP which is less than the needed 51.8 MP.

You have to allow a density that will keep those dimension below your policy limits, even though you resize afterwards. The limits must allow for intermediate images to satisfy as well as your final image.

[q2apro]

But it is still a mystery why the old ImageMagick version did the SVG to PNG conversion, with the same settings 16KP.

[fmw42]

There can be 3 different SVG renderers that can be used. Inkscape is best, followed by RSVG delegate. If neither are installed, then the IM internal MSVG/XML renderer is used, which is the least functional. So you may have/had different SVG renderers in use on the two different systems.