I posted an update to my effort to port the lcms plugin to lcms2 and get it to do high-bit-depth color conversions: http://ninedegreesbelow.com/temp/gimp-lcms-4.html Summary of current state of plugin: It uses lcms2. It does high bit depth conversions, but some options are not available yet. It still uses deprecated functions. Black point compensation flag has been temporarily removed (easy to add back in, just haven't done it yet). The code doesn't check for an alpha channel, and won't work if the image has an alpha channel (easy to add, just haven't done it yet). The code will convert at 8-bit integer, 16-bit integer and 32-bit floating point (only, so far). The ICC profile conversion is seemingly correct only if the starting profile is a linear gamma version of sRGB and the ending profile is the Gimp built-in sRGB, or vice versa. Upon converting to any other ICC profile, the colors come out all wrong (confirm by opening in another application and eye-droppering). ***However***, upon: *exporting the odd-looking image anyway (and confirming that the numbers are wrong in another imaging application) *closing and reopening Gimp (not a necessary step, but eliminates the possibility of "right values" somehow being in memory) *reopening the exported image (which still looks odd) *and then converting it to built-in sRGB or to linear sRGB . . . then the colors are magically right. Which is both bizarre and wrong. Elle -- http://ninedegreesbelow.com Articles and tutorials on open source digital imaging and photography _______________________________________________ gimp-developer-list mailing list gimp-developer-list@xxxxxxxxx https://mail.gnome.org/mailman/listinfo/gimp-developer-list
