Reference font face by URL (web-font)?

[Seb-C]

Thanks for this package.

It can be very useful for my use case, but I need the SVG generation to be very fast and light.

However, it seems that font files not only need to be available locally to the Go process, but are always embedded into the SVG file as a data-url.

Is there any way to reference a web-font by URL only?

Thanks.

[Seb-C]

I actually found the EmbedFonts options, so I can set it to false. It solves half of the issue however, because I also need to set the correct URL for the fonts

[tdewolff]

There is no functionality to do this yet. It'd need an extension to the SVG renderer to be able to couple font names to URLs, I'd be happy to take a PR and otherwise I'll look at it when I have some time

[Seb-C]

Thanks, got it. I'll look at how to make a PR for this when I can.

Just to clarify, we want this to be added purely to the renderer itself (basically associate a font name to a URL).

We do not aim to add some metadata (url) to the canvas/font objects themselves, nor to allow loading fonts from http.

Are those correct assumptions?

[tdewolff]

Thanks for the effort! Yes it would be a feature for the SVG renderer, I guess some sort of map with fonts or font names as keys and web-font URL as value. There are three options: font is not embedded, font is embedded, font is an URL.

Loading fonts from URLs is something different. The above applies to the SVG renderer, but loading fonts into canvas could potentially be made easier with a wrapper that downloads the fonts. Not sure if this is a common need for people?

[Seb-C]

@tdewolff I had to change the approach to make it viable, but I got something that works and is simple enough.

Details in #345