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deeplook / svglib

Read SVG files and convert them to other formats.
GNU Lesser General Public License v3.0
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Size in percent take into account the total size instead of the size of the surrounding container. #246

Closed molitoris closed 4 years ago

molitoris commented 4 years ago

I am drawing an SVG graphic that contains a container with absolute size. The elements contained in it have relative sizes and are drawn accordingly.

When converting to PDF, the nested elements have a different size. It appears that the nested elements are drawn relative to the total size. I expect that the size of the nested elements will also be drawn in PDF relative to the surrounding container.

image.svg

<?xml version="1.0" encoding="utf-8" ?>
<svg baseProfile="full" height="50mm" version="1.1" width="50mm" xmlns="http://www.w3.org/2000/svg" xmlns:ev="http://www.w3.org/2001/xml-events" xmlns:xlink="http://www.w3.org/1999/xlink">
    <defs />
    <rect fill="yellow" height="100%" width="100%" x="0" y="0" />
    <svg height="7mm" id="container" width="7mm" x="21.5mm" y="21.5mm">
        <defs />
        <rect fill="black" height="100%" width="100%" x="0" y="0" />
        <rect fill="white" height="18.75%" width="62.5%" x="18.75%" y="40.625%" />
        <rect fill="white" height="62.5%" width="18.75%" x="40.625%" y="18.75%" />
    </svg>
</svg>

Output: Drawing000.pdf

Minimal example

from svglib.svglib import svg2rlg

drawing = svg2rlg("image.svg")
drawing.save()
claudep commented 4 years ago

Maybe you want to check the above patch whether it solves your issue?

molitoris commented 4 years ago

Thank you for your help.

I am not sure, if I install the svglib correctly. I ran the following command pip install git+git://github.com/claudep/svglib.git@issue246 to install the adapted svglib package.

claudep commented 4 years ago

Chances are that if you didn't get errors, the install worked!

molitoris commented 4 years ago

After setting up a new environment and install all dependencies again, I got the expected result. However, when I ran it with a larger SVG image, I get the following warning multiple times: Unable to resolve percentage unit without knowing the node name. The resulting pdf has a lot of scaling problems.

claudep commented 4 years ago

Would be great if you could post one of those SVGs (or send it directly to me).