On 25 May 2016 at 09:28, Allan Odgaard <mailinglist@textmate.org> wrote:
On 25 May 2016, at 8:42, Jacob Carlborg wrote:

I don't think ICNS is a requirement. The built-in icons, error and warning, use PDF, IIRC.

Correct, they can be any format that is supported by NSImage (TIFF, GIF, PNG, etc.).

Do you know if this also supports SVG?

As its nothing but a bit of xml/ascii, it wouldn't need base64 encoding.
Could also generate these very efficiently, for a given color, without shelling out to some sort of image tool.
Also like PDF, its a vector format so would scale for all UI sizes

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