-----Original Message----- From: marti.ma...@littlecms.com [mailto:marti.ma...@littlecms.com] Sent: 20. februar 2010 17:25 To: Esben Høgh-Rasmussen Cc: lcms-user@lists.sourceforge.net Subject: Re: [Lcms-user] Problems with non-perceptual intents in LCMS2
> Hi, > > Many thanks for reporting. No, the issue is not between keyboard and chair > but in the code, or maybe in the spec itself. The nikon profile has only one > table for perceptual, and then a matrix-shaper. So, what to do when the user > requests rel.colorimetric? lcms-1 was reverting to perceptual, and I guess > this is the required behavior. This is documented in the tutorial, page 13, > "Rendering intents", and due to a bug, the matrix-shaper was being used > instead. > > So thanks a lot. The fix takes 2 lines of code and will be in the git in few > hours. > > Thanks again > Marti. Hi Marti, Thank you very much! I updated and it looks good so far, but we will test it quite thoroughly. Just another quick question (or maybe a feature request): is there a safe way to apply a transform from several threads without locking? I guess I can create several transforms and call each from its own thread, but that may eat up a lot of memory when a large CMYK profile is used. We anticipate 16 to 32 cores in the not-too-distant-future, and we currently need to call cmsDoTransform() per line. I hate to take any kind of lock inside these calls :-/ It would be nice if it is possible to use the same transform with a bit of thread-local data and avoid the locks (or similar). Bonus points if we could just put it on the stack and be done with it. Kind regards, Esben Høgh-Rasmussen Myosotis Software Engineer Phase One A/S Roskildevej 39 DK-2000 Frederiksberg Denmark Phone: + 45 36 13 12 07 Fax.: + 45 36 46 02 22 Mobile: + 45 28 51 10 79 E-mail: e...@phaseone.com www.phaseone.com ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Lcms-user mailing list Lcms-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/lcms-user
