We removed this feature because we switched to numpy MaskedArray (either 0 or 255), which enabled per-band mask and much more.
If people needs to work with non-premultiplied alpha bands then please open a ticket in rio-tiler and we can discuss ways to go forward.
At the same time, it came twice in a week that people were asking for non-premultiplied alpha bands in colormap, and this is somehow maybe easier to fix
In the past (before rio-tiler 5.0, https://cogeotiff.github.io/rio-tiler/migrations/v5_migration/#per_dataset-per_band-mask) we allowed mask values between 0 and 255 (https://github.com/cogeotiff/rio-tiler/pull/580#discussion_r1130135193).
We removed this
featurebecause we switched to numpy MaskedArray (either 0 or 255), which enabled per-band mask and much more.If people needs to work with non-premultiplied alpha bands then please open a ticket in rio-tiler and we can discuss ways to go forward.
At the same time, it came twice in a week that people were asking for
non-premultiplied alpha bandsin colormap, and this is somehow maybe easier tofix