rodarima
commented
4 months ago One of the main good uses of SVG images is to read Wikipedia equations, which are included as a fallback for non-JS browsers. The equations are all rendered with MathJax, which defines all the glyphs using <defs> and then places each glyph in the proper position using the <use> tag.
This is problematic, as both libsvgtiny and nanosvg lack support for them and cannot render Wikipedia equations. I tested librsvg and renders properly those equations, but is by far a very large and complex library:
(We also need to avoid rendering the MathML parts of the Wikipedia)
Ideally we should either implement support for defs/use or find another less complicated library that implements it. The size of librsvg is a wopping 3MiB, without dependencies.
Add support for SVG images, as they are becoming more frequent in the web.
We probably should link or embed a SVG library that performs the rastering, but make it optional so it can be disabled on build time.
Some options from #53 :
In other to test that it works fine, we could have a reference page with a image already rendered to PNG or a similar format, and compare the result with the new library rendering the same SVG image.