ImageMagick convert no longer respects -density

[ndw@…]

At some point in the past couple of months (before I upgraded to 1.8.0, but I don't know precisely when), ImageMagick's convert program stopped respecting the -density option.

convert something.svg something.png

produces a 72dpi version of the source SVG file. It used to be the case that

convert --density=150 something.svg something150.png

would produce a 150dpi version of the source SVG file.

Today, the density option is simply ignored and the resulting PNG is always 72dpi.

[ndw@…]

A sample SVG file

[ryandesign@…]

You should ​report this problem to the developers of ImageMagick.

[ndw@…]

I subscribed to magick-bugs and sent a message, but haven't seen any reply, nor has the message appeared in the magick-bugs archives. I believe you're subscribed, did you get my message? If nothing turns up in another 24 hours or so on the archives, I'll send it again.

[ryandesign@…]

I have not seen your message, but I have seen it take some time for messages to show up on the list. It may be moderated, so I would just wait awhile.

[ndw@…]

Installing the +rsvg variant of ImageMagick fixes this problem. I don't know what that says about whether or not the +rsvg variant should be a variant or if it should be the default.

[ryandesign@…]

rsvg has a very large number of dependencies​ and not everybody needs to convert svg files, so I think it's fair to keep it as a variant.

The rsvg variant was added on 2008-04-18 to fix #15036. Before that time, librsvg would have been automatically used if present, which violated MacPorts policy of not using software on which a dependency has not been declared.