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by perk 2139 days ago
FWIW html2canvas is pretty good for all html-screenshotty things. Might work here as well.

https://html2canvas.hertzen.com/
2 comments
onion2k 2139 days ago
Good as html2canvas is, these days you may get more milage creating an SVG, putting the HTML content in it as a ForeignObject, and then using the browser's ability to copy an image to a canvas with the SVG as the source. I use that technique in a very complex diagramming app I work on and it never seems to fail regardless of the HTML content. Getting fonts and external styles to work is fun but that wouldn't apply here.
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xamde 2138 days ago
Off-topic, but please tell us more about the diagramming app.
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perk 2139 days ago
Come to think of it, CSS isn't its strongest side. No support for filters I think. Maybe worth checking it out anyway.
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jordanmarshall 2139 days ago
I looked into it before, and I don't think html2canvas would work. IIRC the only way to get the gradients was using the screen capture API [1], which works, but requires users to click an authorization prompt before use.

[1] https://developer.mozilla.org/en-US/docs/Web/API/Screen_Capt...

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perk 2139 days ago
Hm. I've used image-screenshot [1] in the past together with html2canvas to get CSS filter support in screenshots. Don't know if it would work in your scenario though.

[1] https://www.npmjs.com/package/image-screenshot

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