Noel, I've run into the same issue as you and I would find the option you described to color-manage RBGA images in an out-of-place manner very useful.
Terence > On Feb 1, 2015, at 9:02 AM, Noel Carboni <ncarb...@prodigitalsoftware.com> > wrote: > > Hi Marti / Open Source Developer(s), > > As always, thank you for publishing your excellent LittleCMS library. > > Virtually all we use LittleCMS on are RGBA images. One of the things we have > to do now is handle the unused field (A) separately. > > Would it be possible/reasonable to add an option to LittleCMS so that it > would simply carry through unused A values without > modification (or with a simple format change, per the format specifiers)? > > As it is now we have to copy the data first, then color-manage it, but it > would be nice to be able to have a single function > (embodying a cmsDoTransform call) that would copy / color-manage / > format-convert ALL the data in one pass. We already have > workarounds implemented, but having it all done at once by LittleCMS would > better serialize RAM access and save some computer time. > On today's powerful multi-core machines RAM bandwidth can be a bottleneck. > > If you are open to the idea of adding this functionality to the product, I > may be able to allocate some time to help with the > implementation. > > If you are a LittleCMS user on the mailing list who would also like to see > this addition, please let us know. > > Thanks. > > -Noel Carboni > ProDigital Software > > > ------------------------------------------------------------------------------ > Dive into the World of Parallel Programming. The Go Parallel Website, > sponsored by Intel and developed in partnership with Slashdot Media, is your > hub for all things parallel software development, from weekly thought > leadership blogs to news, videos, case studies, tutorials and more. Take a > look and join the conversation now. http://goparallel.sourceforge.net/ > _______________________________________________ > Lcms-user mailing list > Lcms-user@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/lcms-user ------------------------------------------------------------------------------ Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ _______________________________________________ Lcms-user mailing list Lcms-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/lcms-user
