Convert svg to png imagemagick black border around path

Question

I am on macOs Mojave 10.14.3 (18D109)

My imagemagick details (installed with brew)

convert -version
Version: ImageMagick 7.0.8-35 Q16 x86_64 2019-03-25 https://imagemagick.org
Copyright: © 1999-2019 ImageMagick Studio LLC
License: https://imagemagick.org/script/license.php
Features: Cipher DPC HDRI Modules OpenMP 
Delegates (built-in): bzlib freetype heic jng jp2 jpeg lcms ltdl lzma openexr png tiff webp xml zlib

I have a basic svg (adopted from W3Schools example):

<?xml version="1.0"?>
<svg xmlns="http://www.w3.org/2000/svg" width="52" height="52" viewBox="0 0 52 52">
  <path fill="#fff" d="M22 0 L33 52 L12 42 Z">
</path>
</svg>

That looks like this (Gapplin):

Now when i convert it to png like so:

convert -background none -density 9600 -resize 32x "myFile.svg" "myFile.png"

i get a perfect image, except it has a black border:

I tried just about every variation of command options for imagemagick that had to do with color or black and sadly it never comes out with what i want - transparent background, solid white path (as described by fill on the SVG).

Any suggestions?

fmw42 fmw42 · Accepted Answer · 2019-03-27T04:57:26

In ImageMagick, SVG files can be rendered by any one of three tools: Imagemagick's MSVG/XML, RSVG delegate and Inkscape, usually in order of increasing accuracy.

I just tried the following command with Inkscape 0.92.4 and it comes out totally white. If Inkscape is installed Imagemagick will use it automatically. But in this case it is not working well with that file.

magick test.svg test2.png

But it works fine if I added -background none

magick -background none test.svg test2.png

I get a white triangle on a transparent background.

or if I want a black background

magick -background black test.svg test2.png

When I force Imagemagick to use MSVG, I get a white triangle with a simple black outline on a white background. So again not correct by your comments.

magick MSVG:test.svg test2.png

If I add -background none, then I get white triangle with black outline on a transparent background.

magick -background none MSVG:test.svg test2.png

But if I just want a black background, then

magick -background black MSVG:test.svg test2.png

I then get a white triangle on a black background. But I suspect the white triangle is slightly smaller from the black border it had.

When I force the use of RSVG 2.44.12 by creating an entry in the delegates.xml file, I get a white triangle on a transparent background, which I assume is what you want.

magick RSVG:test.svg test3.png

or

magick -background none RSVG:test.svg test3.png

You can tell if your Imagemagick has MSVG/XML or RSVG by

magick -list format

and look for the line starting with SVG. At the end of that line it will either say XML or RSVG. You cannot tell about Inkscape with this method.

Check to see what you are using for your SVG renderer and its version. Also the version of libpng. Mine is 1.6.36

From your version information, I do not see rsvp listed. So I assume you are using MSVG, but it could be Inkscape if you have installed that on your system.

I am on Mac OSX Sierra with Imagemagick 7.0.8.35 Q16.

Convert svg to png imagemagick black border around path

2 Answers