LUT Maker: support additional LUT formats

[cessen]

LUT Maker currently only supports a small number of LUT formats. We probably don't need to support a large number of formats, since there's likely a subset that are widely supported enough for interoperating with other software. But there may be use-cases that the current supported formats don't cover.

Please leave a comment if you need to export to a LUT format that currently isn't supported. And if you can find a technical specification of the format (which are needed for implementation) even better!

So far:

• .spi1d
  • [x] Reading
  • [x] Writing
• .cube (standard)
  • [x] Reading
  • [x] Writing
• .cube (Davinci Resolve's custom incompatible variant): informal spec
  • [x] Reading
  • [ ] Writing (no plan to support this; just use standard .cube instead)

[cessen]

Implemented support for reading Resolve .cube files in 8d866b466fa8e7d7d43152a124c58b8d075f16cb.

[mik01aj]

Hey Nathan! I see that the OCIO maker can now read DaVinci LUTs, which is nice, but I have the opposite problem - I'd like to get the LUTs from LUT Maker (currently .spi1d files) into DaVinci Resolve. Do you have any plans of adding also write support for .cube LUTs?

[pallazola]

in at least the latest dev release the .cube format is an output format. I'm not sure in what release it was added.

[cessen]

Writing .cube format has been available since pretty early on, so you should already be able to do that. We don't support writing DaVinci .cube format, but I don't think that should matter: I'm pretty sure DaVinci supports reading standard (non-DaVinci) .cube files as well. (And if they don't, that's baffling given that it's supposed to be a professional tool.)

I'll edit the issue to make it clearer what's already supported in LUT Maker.