DPI / resolution of rasterized PNGs

[devth]

Is there a way to increase DPI of PNGs that Kroki produces?

I tried the kroki cli with the OO Graph example:

kroki convert test/oo.dot -o out.jpg

This produces a super low-res PNG:

Thanks for the amazing lib / service!

[ggrossetie]

Hey @devth thanks for your kind words!

You can configure the DPI using the dpi attribute in your diagram: https://graphviz.org/doc/info/attrs.html#d:dpi

graph G { 
  graph [ dpi = 300 ]; 
  /* The rest of your graph here. */ 
}

Here's an example:

Default DPI	300 DPI

It might be worth to document it... 🤔

If you want more control, I guess you could export the diagram to SVG and then post-process it to create a high-resolution png.

[devth]

Awesome! Thank you. I didn't find that when googling around so it might be worth documenting.