text with only 1 down scaled <rect> element 1:100
Problem version: File:Ikaros_solar_sail_key_plain.svg - with scale(.06) (= matrix(.06 0 ...)
Fixed version: File:Ikaros_solar_sail_key.svg - down scale removed
T36947: Incorrect text positioning in SVG rasterization (scale/transform; font-size; kerning) looks at first glance exactly, but these has other effects and very different cause. I've also analyzed some text problems from T19845: DejaVu Sans font renders incorrectly in SVG thumbnails, which was already fixed but someone has it reopened with other/this examples (DejaVu font) with other different issue, so I open this new general bug, because I found the concrete cause and can differentiate it clear.
I guess every font family is affected, the font-size is also irrelevant (all font related seems irrelevant, thats the main difference to T36947: Incorrect text positioning in SVG rasterization (scale/transform; font-size; kerning))
Every SVG element(regardless of whether text or not) that got a down scale 1 : >5 and lays under the text (in the code only) has a negative effect on the font rendering. The larger the down scaling the greater the effect.
Another example:
File:Glaubensartikel des Islam.svg (19:14, 6. Apr. 2014, that is fixed now) has rendered as
https://upload.wikimedia.org/wikipedia/commons/thumb/archive/b/b4/20140406212617!Glaubensartikel_des_Islam.svg/300px-Glaubensartikel_des_Islam.svg.png
Version: wmf-deployment
Severity: normal
URL: https://commons.wikimedia.org/wiki/File:Ikaros_solar_sail_key_plain.svg
See Also:
T36947: Incorrect text positioning in SVG rasterization (scale/transform; font-size; kerning)
T19845: DejaVu Sans font renders incorrectly in SVG thumbnails
Attached:
Comparison of broken and fixed renderings: