By the way, based on the examples you posted, it seems to me that the one you built yourself is "correct", in the sense that if you do a color transformation from sRGB to linear, I expect it to have lower values (look darker, if viewed with the same response curve). The one that you said was made by the Ubuntu package doesn't seem to have changed at all, which certainly seems wrong to me.
> On Jan 4, 2018, at 11:36 PM, Larry Gritz <[email protected]> wrote: > > Well, we went a few rounds of trying to decide how the different cases > > 1. Built without OCIO > 2. Built with OCIO, but no OCIO config found at runtime > 3. Built with OCIO, OCIO config found, but doesn't have a "sRGB" space in the > config > 4. All stars align, OCIO and it knows sRGB > > should match or not, and what they should do. There have been several patches > about this over the years. > > I think that some time in the 1.7 days, we improved this by finally deciding > that 1-3 should all agree and do the "right" thing. > > The mismatch you're seeing with two builds of 1.6 probably either means that > they were built from two different commits that straddle some change in this > logic (or something else related), or else perhaps you aren't correct about > them both being build without OCIO. > > FYI, the currently supported stable release is the 1.8 series. If you're > already considering building your own, I would recommend not fooling around > with the Ubuntu OIIO 1.6 package, skip directly to 1.8 if you possibly can, > and see if it fixes the cases you're interested in. If it does, it's probably > not worth trying to figure out the fine points of why 1.6 is not having the > behavior you want. (If 1.8 or later is still not doing what you expect, then > I definitely want to figure out why.) > > -- lg > > >> On Jan 4, 2018, at 11:53 AM, Jordi Torres <[email protected] >> <mailto:[email protected]>> wrote: >> >> Hi again, >> >> I disabled it in cmake on purpose, because the packaged one is not compiled >> against OpenColorIO. >> >> Anyway as far as I understand OCIO should not interfere in srgb to linear >> conversions, am I wrong? >> >> Thanks. >> >> 2018-01-04 17:50 GMT+01:00 Larry Gritz <[email protected] >> <mailto:[email protected]>>: >> Were either built with OpenColorIO support enabled? >> >> >> >> >> On January 4, 2018 8:43:43 AM PST, Jordi Torres <[email protected] >> <mailto:[email protected]>> wrote: >> Hi Larry, >> >> Mainly 1.6.x versions. >> >> Thanks. >> >> 2018-01-04 17:40 GMT+01:00 Larry Gritz <[email protected] >> <mailto:[email protected]>>: >> Which versions of oiio are they? >> >> >> >> >> On January 4, 2018 8:13:40 AM PST, Jordi Torres <[email protected] >> <mailto:[email protected]>> wrote: >> Hi all, >> >> I'm pretty new to this library, so forgive my ignorance if I say somethign >> dumb. >> I'm having different results with the command: >> oiiotool test.png --colorconvert sRGB linear -o out.png depending if I use >> my own compiled oiiotool or I use the Ubuntu packaged one. >> >> It happens with different oiio versions. I'm running Ubuntu 16.04. >> >> Attached the results. Does it ring a bell for anybody? >> >> Thanks. >> -- >> Jordi Torres >> >> >> >> -- >> Larry Gritz >> [email protected] <mailto:[email protected]> >> >> >> >> -- >> Jordi Torres >> >> >> >> -- >> Larry Gritz >> [email protected] <mailto:[email protected]> >> >> >> >> -- >> Jordi Torres > > -- > Larry Gritz > [email protected] <mailto:[email protected]> > > > > > _______________________________________________ > Oiio-dev mailing list > [email protected] > http://lists.openimageio.org/listinfo.cgi/oiio-dev-openimageio.org -- Larry Gritz [email protected]
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