Sounds good to me too (not that I really have the background to say so). 1. Are there any plans to contribute JPEGXL in tiff to https://gitlab.com/libtiff/libtiff? 2. And what would one need to do to patch libtiff to use JPEGXL?
Thanks! On Mon, Jan 6, 2025 at 9:54 AM thomas bonfort via gdal-dev < gdal-dev@lists.osgeo.org> wrote: > sounds good, +1 > > thanks, > TB > > Le lun. 6 janv. 2025, 18:44, Even Rouault via gdal-dev < > gdal-dev@lists.osgeo.org> a écrit : > >> Hi, >> >> Given that communication with Adobe in recent years has been similar to >> expecting to receive a signal from a black hole from outside its event >> horizon, up to now we have unilaterally attributed Compression=50002 to >> mean JPEGXL in TIFF. Recently I saw that the DNG 1.7 specification has >> registered value 52546 to mean JPEGXL in DNG >> ( >> https://helpx.adobe.com/content/dam/help/en/photoshop/pdf/DNG_Spec_1_7_0_0.pdf >> , page 122). DNG is a derivative of the TIFF spec, so I guess/hope Adobe >> makes sure that tag & tag value numbers don't collide between base TIFF >> and DNG. So it would seem to me that switching to using the 52546 value >> would be more future proof than our self-assigned 50002. If so, I'd do >> the change in master to using 52546 on write side and accepting both >> 50002 and 52546 on read side, and backport read support for 52546 in 3.10 >> >> (this is mostly a GDAL-only topic for now given that the JPEGXL TIFF >> codec is for the internal libtiff copy only) >> >> Thoughts? >> >> Even >> >> -- >> http://www.spatialys.com >> My software is free, but my time generally not. >> Butcher of all kinds of standards, open or closed formats. At the end, >> this is just about bytes. >> >> _______________________________________________ >> gdal-dev mailing list >> gdal-dev@lists.osgeo.org >> https://lists.osgeo.org/mailman/listinfo/gdal-dev >> > _______________________________________________ > gdal-dev mailing list > gdal-dev@lists.osgeo.org > https://lists.osgeo.org/mailman/listinfo/gdal-dev >
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