how to set DPI

[catmando]

this just seems very unclear can we have an example someplace?

[Eneroth3]

I have the same question. I'm working on exporting scaled drawings from SketchUp and the only tricky part has being writing DPI metadata to exported files.

[jamesbebbington]

Me three. I'd like to set whatever metadata is required, so that a hi DPI screenshot taken with Selenium with a force-device-scale-factor=2, when opened in MacOS defaults to be zoomed to effectively 50% of the raw resolution. i.e. in the same fashion as when opening a screenshot taken using MacOS itself.

I'm assuming that's related to the pHYs Physical pixel dimensions and that perhaps ChunkyPNG::Chunk::Physical is what I'm after. Any pointers would be much appreciated. Thanks!