PDF export

[Keavon]

We should probably use https://github.com/LaurenzV/krilla as our library. This involves writing an equivalent renderer alongside our SVG and Vello renderers in https://github.com/GraphiteEditor/Graphite/blob/master/node-graph/gsvg-renderer/src/renderer.rs

[TrueDoctor]

I'd prefer if we don't add a third code path we have to maintain and instead reuse the svg export via a crate like https://github.com/typst/svg2pdf

[Keavon]

SVG is too restrictive and not expressive enough to support PDF's features, especially those that deal with the physical world (physical units, color for print, etc.). One basic example is the conic/sweep gradient, which SVG lacks but PDF (and Krilla) supports. Especially as we more towards desktop publishing use cases, we will need some very, very advanced PDF writing support (and I'd even worry that we may outgrow Krilla's high-level abstractions).

[dhiraj-143r]

I am interested to work on it , will you plz assign me this issue

[Keavon]

You are welcome to open a PR but assignments will only be completed upon merging an attempted PR. Please note that this is not likely to be a beginner-friendly issue, it requires a decently experienced coding background.

[LaurenzV]

I'd prefer if we don't add a third code path we have to maintain and instead reuse the svg export via a crate like https://github.com/typst/svg2pdf

svg2pdf is in maintenance mode. If you do end up using krilla, I would recommend using krilla-svg for the SVG conversion (it has the same capabilities). :)

[LaurenzV]

(krilla-svg is basically the successor of svg2pdf, I pretty much wrote both libraries.)