Dynamically create own SVG tree.

[spirali]

Hi,

I am using usvg as an intermediate representation of an image data. In version 0.39, I was able to dynamically create a tree and then render it. Is it still possible to do this with the current API? It seems that now I cannot now create own of tree nodes outside of usvg crate.

[LaurenzV]

It's not possible anymore. See #710.

[spirali]

Thank you.

[RazrFalcon]

You're suppose to use tiny-skia directly. Creating usvg::Tree by hand and passing it to resvg would be way slower.

[spirali]

I actually used this mainly for creating PDF; I built a usvg tree and then render it via svg2pdf. Therefore, the correct way for me is to probably directly use pdf-writer. Now I will need two renderers, one via tiny skia and one trough pdf-writer, but I understand your decision.

[LaurenzV]

Writing a renderer from scratch with pdf-writer will be a pain... You will probably have an easier time if you instead construct an SVG string and convert that. This is still more inconvenient than constructing the tree directly, but definitely less inconvenient then maintaining two rendering backends.

[spirali]

I am going to use serialization to SVG string as a baseline, but I am afraid that it will not be sufficient for me as sometimes my pages contains large raster images and serialization them to base64 and back would be a non-negligible step. My usage of usvg API was mainly because I could directly put png/jpg images into SVG without this serialization/deserialization step.

Nevertheless, I was planning to write own PDF backend mainly because of raster image reuse. AFAIK, in the current version of svg2pdf, if more SVG embeds the same raster image, then it is serialized several times into PDF