I'm still awaiting suggestions for correcting the problem described below. Note that I've also tried using cmsCreateProofingTransform rather than creating a 2nd device link profiles and then calling cmsCreateMultiprofileTransform. Same result.
On May 21, 2008, at 09:57:40, Steve Mills wrote: > I've had time to get back to handling a 4-profile transform and have > run into a problem. I'll start with the profiles in use in my test > case, in this order: > > profs[0] = input (rgb) > profs[1] = printer (cmyk) > profs[2] = proofer (cmyk) > profs[3] = monitor (rgb) > > I first create 2 xforms, one for input -> printer, and another for > proofer -> monitor. > > xform1 = cmsCreateTransform(profs[0], fromFormat, profs[1], > lcmsSpace2lcmsFormat(cmsGetColorSpace(profs[1]), true, > bytesPerChannel), cmsTakeRenderingIntent(profs[0]), 0); > xform2 = cmsCreateTransform(profs[2], > lcmsSpace2lcmsFormat(cmsGetColorSpace(profs[2]), true, > bytesPerChannel), profs[3], toFormat, > cmsTakeRenderingIntent(profs[2]), 0); > > Note that fromFormat is the format for the input data used with the > input profile, and toFormat is the format for the output data used > with the monitor profile. What I might be getting wrong here are the > other 2 formats; xform1's output format, and xform2's input format. > Does my code look correct for those? > > The xforms are then converted to device link profiles: > > link1 = cmsTransform2DeviceLink(xform1, 0); > link2 = cmsTransform2DeviceLink(xform2, 0); > > And the final xform is created from those: > > xform = cmsCreateMultiprofileTransform(links, 2, fromFormat, toFormat, > cmsTakeRenderingIntent(profs[1]), 0); > > The end result is that I get error "Invalid PCS" when GetPhase is > called on the link2 profile - it's icSigRgbData. How do I fix this? > > If I instead call: > > xform = cmsCreateTransform(link1, fromFormat, link2, toFormat, > cmsTakeRenderingIntent(profs[1]), 0); > > which I did just as a test, I get the error "Device link is operating > on wrong colorspace on output" for link1. _________________________________________________________ Steve Mills Me: 952-401-6255 Senior Software Architect MultiAd [EMAIL PROTECTED] www.multi-ad.com ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Lcms-user mailing list Lcms-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/lcms-user
