Would it be straightforward to implement the “content colorspace” option for other tone curves aside from SMPTE 2084 with roll-off?
There’s a particular use case for LG OLED’s where the calibration mode in HDR bypasses the tonemapping such that the calibration target is gamma 2.2 BT.2020. These displays also rely more and more on the white subpixel at higher luminance such that the colours desaturate, so perceptual rendering intents are well motivated here to avoid excessive clipping, but there’s no need to do this beyond the DCI-P3 sub-space.
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