Hi Kyle, just checked. "Retagging" sounds like "assign profile", not converting from a profile to another one. Am I right?
In case of CMYK profile when I call [window setColorSpace:cmykColorSpace]; I get the following error. I think the device can't support it. error [1000] setting colorSpace to Coated FOGRA27 (ISO 12647-2:2004) colorspace When I call [rep bitmapImageRepByRetaggingWithColorSpace:cmykColorSpace]; using a CMYK profile, I get a nil representation. Same trouble with profiles as "Blue Tone". In case of RBG profiles it works well and fast. But I need CMYK too. At this point, just to begin, I would need to separate the CMYK profiles from the RGB ones. Should I look at NSColorSpace numberOfColorComponents API? Regards -- Leonardo > Da: Kyle Sluder <k...@ksluder.com> > Data: Wed, 12 Mar 2014 15:36:22 -0700 > A: Leonardo <mac.iphone....@gmail.com>, <cocoa-dev@lists.apple.com> > Oggetto: Re: bitmapImageRepByConvertingToColorSpace on the fly > > On Wed, Mar 12, 2014, at 02:13 PM, Leonardo wrote: >> Hi, I properly draw an imageRep within a NSView using >> >> [rep drawInRect:inRect fromRect:fromRect operation:NSCompositeSourceOver >> fraction:1.0 respectFlipped:YES hints:nil]; >> >> Now I would like to simulate the result of adopting a given ICC color >> profile. So, if for instance I choose a gray profile I see all the images >> grayed out. I have been successfully using >> >> bitmapImageRepByConvertingToColorSpace: >> >> and I get the right result. When I change the profile I rebuild my >> representation, the I always use that. >> Anyway, when I have several images on the page, it takes a long long >> time. >> So, I would like to know whether there is a way to get the same result >> just >> modifying the profile on the NSView's context, e.g. in the NSView's >> drawRect: method or applying a CIFilter, if that will not slow down the >> rendering speed. Any way? > > You could try creating an overlay window and setting its color space to > your target color space using -setColorSpace. Put an NSImageView in that > window, and hand it a version of your image that you've retagged into > the destination colorspace using > -bitmapImageRepByRetaggingWithColorSpace:. > > N.B.: This might not actually be any faster. I've never tried it. > > --Kyle Sluder _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
