Text in SVG images not displayed correctly

tfpf commented 2 years ago

 * Xviewer version 3.0.2
 * Distribution Linux Mint 20.2 (Uma)

Issue Xviewer does not correctly render SVGs containing text tags if a list of coordinates is specified.

Steps to reproduce Save the following text to a file, say image.svg.

<svg width="100" height="20" xmlns="http://www.w3.org/2000/svg" version="1.1">
    <rect width="100%" height="100%" fill="#EEEEEE" />
    <text x="0 33 67" y="18">Foo</text>
</svg>

Open it using Xviewer.

Expected behaviour A_firefox_is_correct

Actual Behaviour B_xviewer_is_wrong

Other information

Firefox renders it correctly (that's how I got the first image).
The font in the two images differs, but that is only because Firefox uses its default typeface, which is not the same as my system default typeface. The only bug seems to be the positioning of the glyphs.
Handling lists of coordinates (as in the SVG code above) is described in section 11.2.1 of the standard.

If a comma- or space-separated list of n \<length>s is provided, then the values represent new absolute X (Y) coordinates for the current text position for rendering the glyphs corresponding to each of the first n addressable characters within this element or any of its descendants.

programmer-ceds commented 2 years ago

As you say Firefox takes note of the list of x coordinates (as does Inkscape) but xviewer, pix and GIMP (V2.10.30 and V2.99.10) do not. (Checks done on Mint 20.3 Cinnamon with xviewer V3.2.4)

However, this appears to be a problem in librsvg (which both xviewer and GIMP both use). See the following fault report:

https://gitlab.gnome.org/GNOME/librsvg/-/issues/183

This issue should be closed as it isn't specifically an xviewer problem.

tfpf commented 2 years ago

Great point; I didn't think of comparing how other tools like Pix render it.

Closing because (as pointed out) it is a problem with the library.

linuxmint / xviewer

Text in SVG images not displayed correctly #161