Re: [Gimp-developer] Fwd: [GUG] CMYK under Gimp.
... after the weekend Am 21.11.03, 07:44 -0800 schrieb Daniel Rogers: | This would be fine for unix based systems too. Are there any plans to | create an system interface for X to plug-in an CMM? | Do You know someone allready working on this? yeah, I am working on this. Hopefully, I will be going to talk to the X.org and freedesktop people in December. Staying interessted. | Can You provide more informations about the current state of CMS in GEGL? Ok, so I avoided the question. Do you want me to discuss technical details of how I think colormanagement will work in gegl? Yes, I am interessted in how gegl handles color space conversions for instance. The more interessting question is how it is planed to get an interface for tools and plug-ins to handle the same command to all color spaces. For instance brighten an image affects all channels in RGB in Lab only the L (Lightness) channel. By the way is gegl C++ and can it use templates to have only one function for all color depths in common? Sorry if I mix here something. Maybe You like to continue the discussion in the gegl list, so I will need to subscribe. regards Kai-Uwe ___ Gimp-developer mailing list [EMAIL PROTECTED] http://lists.xcf.berkeley.edu/mailman/listinfo/gimp-developer
Re: [Gimp-developer] Fwd: [GUG] CMYK under Gimp.
Am 21.11.03, 16:04 +0100 schrieb Sven Neumann: would help plug-ins to easily link against liblcms? I don't see how a configure check in GIMP would help plug-ins so the answer to the question doesn't really matter. I'll give it anway: I've added such a check a few minutes ago when the color proof display filter was added to CVS. Great. Thanks for this hint. I will see what I can do with it. -- Kai-Uwe ___ Gimp-developer mailing list [EMAIL PROTECTED] http://lists.xcf.berkeley.edu/mailman/listinfo/gimp-developer
Re: [Gimp-developer] Fwd: [GUG] CMYK under Gimp.
Hi, Kai-Uwe Behrmann [EMAIL PROTECTED] writes: would help plug-ins to easily link against liblcms? I don't see how a configure check in GIMP would help plug-ins so the answer to the question doesn't really matter. I'll give it anway: I've added such a check a few minutes ago when the color proof display filter was added to CVS. Great. Thanks for this hint. I will see what I can do with it. Hmm? As I already outlined, the configure check in GIMP doesn't help external plug-ins and modules. Also, GIMP does not depend on lcms now, so I wonder what exactly you are trying to do with it ...? Sven ___ Gimp-developer mailing list [EMAIL PROTECTED] http://lists.xcf.berkeley.edu/mailman/listinfo/gimp-developer
Re: [Gimp-developer] Fwd: [GUG] CMYK under Gimp. (fwd)
I resend this email, as it was lost by the lists.xcf.berkeley.edu mailserver. -- Forwarded message -- Date: Mon, 24 Nov 2003 11:03:41 +0100 (CET) From: Kai-Uwe Behrmann [EMAIL PROTECTED] To: Sven Neumann [EMAIL PROTECTED] Cc: [EMAIL PROTECTED], [EMAIL PROTECTED] Subject: Re: [Gimp-developer] Fwd: [GUG] CMYK under Gimp. Hi, Am 21.11.03, 16:48 +0100 schrieb Sven Neumann: X11 has support for color management for a lng time already. What exactly is missing in your opinion? That was my surprise and hope some time ago too. I looked in the man pages and found only some rudimentary entries describing how to convert single colour for the colour selction. I am not aware of any mechanism on how to send Lab or Yuv or something else directly to X for displaying. And I did not found any mechanism on telling X which is the correct monitor profile. This I would call colour management. regards Kai-Uwe ___ Gimp-developer mailing list [EMAIL PROTECTED] http://lists.xcf.berkeley.edu/mailman/listinfo/gimp-developer
Re: [Gimp-developer] Fwd: [GUG] CMYK under Gimp.
Am 20.11.03, 21:10 -0800 schrieb Daniel Rogers: I am working on an api for this in GEGL. It is probably best to use the system api's, when available, since there are already methods to plug lcms into the exisiting system api's (on windows and Mac OS X) as a CMM. This would be fine for unix based systems too. Are there any plans to create an system interface for X to plug-in an CMM? Do You know someone allready working on this? ~ There will be an abstraction in GEGL for this. Eventually, I am going to try an get it moved to the freedesktop.org people (and into gtk). But that is quite a long term goal. Can You provide more informations about the current state of CMS in GEGL? regards Kai-Uwe ___ Gimp-developer mailing list [EMAIL PROTECTED] http://lists.xcf.berkeley.edu/mailman/listinfo/gimp-developer
Re: [Gimp-developer] Fwd: [GUG] CMYK under Gimp.
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Kai-Uwe Behrmann wrote: | Am 20.11.03, 21:10 -0800 schrieb Daniel Rogers: | | |I am working on an api for this in GEGL. It is probably best to use the |system api's, when available, since there are already methods to plug |lcms into the exisiting system api's (on windows and Mac OS X) as a CMM. | | | This would be fine for unix based systems too. Are there any plans to | create an system interface for X to plug-in an CMM? | Do You know someone allready working on this? yeah, I am working on this. Hopefully, I will be going to talk to the X.org and freedesktop people in December. | |~ There will be an abstraction in GEGL for this. Eventually, I am going |to try an get it moved to the freedesktop.org people (and into gtk). |But that is quite a long term goal. | | | Can You provide more informations about the current state of CMS in GEGL? asking about the CMS in GEGL is really asking about the current state of LCMS. LCMS is a pretty darn complete color management system. And there isn't a lot of solid information. I know what I want to do, I just need to do it. Ok, so I avoided the question. Do you want me to discuss technical details of how I think colormanagement will work in gegl? - -- Daniel -BEGIN PGP SIGNATURE- Version: GnuPG v1.2.3 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQE/vjLYad4P1+ZAZk0RAlSoAJ99xIpYFjvU/SwLsoM7ycGYnFgksQCffwU/ PGXujXw8vKC9loidpL3+jVM= =t8ym -END PGP SIGNATURE- ___ Gimp-developer mailing list [EMAIL PROTECTED] http://lists.xcf.berkeley.edu/mailman/listinfo/gimp-developer
Re: [Gimp-developer] Fwd: [GUG] CMYK under Gimp.
Hi, Kai-Uwe Behrmann [EMAIL PROTECTED] writes: This would be fine for unix based systems too. Are there any plans to create an system interface for X to plug-in an CMM? Do You know someone allready working on this? X11 has support for color management for a lng time already. What exactly is missing in your opinion? Sven ___ Gimp-developer mailing list [EMAIL PROTECTED] http://lists.xcf.berkeley.edu/mailman/listinfo/gimp-developer
Re: [Gimp-developer] Fwd: [GUG] CMYK under Gimp.
Hi, Kai-Uwe Behrmann [EMAIL PROTECTED] writes: Have gimps configure an header check for lcms allready onboard? This would help plug-ins to easily link against liblcms? I don't see how a configure check in GIMP would help plug-ins so the answer to the question doesn't really matter. I'll give it anway: I've added such a check a few minutes ago when the color proof display filter was added to CVS. Sven ___ Gimp-developer mailing list [EMAIL PROTECTED] http://lists.xcf.berkeley.edu/mailman/listinfo/gimp-developer
Re: [Gimp-developer] Fwd: [GUG] CMYK under Gimp.
Am 18.11.03, 22:49 +0100 schrieb Sven Neumann: correction filters. If these plug-ins and modules all use lcms and share ICC profiles by means of gimprc and parasites, you could use Have gimps configure an header check for lcms allready onboard? This would help plug-ins to easily link against liblcms? Kai-Uwe ___ Gimp-developer mailing list [EMAIL PROTECTED] http://lists.xcf.berkeley.edu/mailman/listinfo/gimp-developer
Re: [Gimp-developer] Fwd: [GUG] CMYK under Gimp.
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Kai-Uwe Behrmann wrote: | Am 18.11.03, 22:49 +0100 schrieb Sven Neumann: | | |correction filters. If these plug-ins and modules all use lcms and |share ICC profiles by means of gimprc and parasites, you could use | | | Have gimps configure an header check for lcms allready onboard? This | would help plug-ins to easily link against liblcms? I am working on an api for this in GEGL. It is probably best to use the system api's, when available, since there are already methods to plug lcms into the exisiting system api's (on windows and Mac OS X) as a CMM. ~ There will be an abstraction in GEGL for this. Eventually, I am going to try an get it moved to the freedesktop.org people (and into gtk). But that is quite a long term goal. - -- Dan -BEGIN PGP SIGNATURE- Version: GnuPG v1.2.3 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQE/vZ5gad4P1+ZAZk0RAuVDAKCRS6p+8Vz2BbW3e6D7SxhMJ3iooACfWfvs IW22eyXeFgylASqfV5jWMQk= =fe6n -END PGP SIGNATURE- ___ Gimp-developer mailing list [EMAIL PROTECTED] http://lists.xcf.berkeley.edu/mailman/listinfo/gimp-developer
[Gimp-developer] Fwd: [GUG] CMYK under Gimp.
Hi there, The subject of colour management surfaced in the last days on the GUG list. I am still with no time to look at the GIMP :'-( ...but this e-mail bellow just look TOO promising. I hope someone here can take a deep look at it. :-) JS -- -- Forwarded Message -- Subject: [GUG] CMYK under Gimp. Date: Tuesday 18 November 2003 17:10 From: Alastair Robinson [EMAIL PROTECTED] To: [EMAIL PROTECTED] Hi, I hacked together a plugin some time ago that uses the LCMS colour-management library to convert images from RGB to CMYK, using ICC profiles. Since the GIMP currently has no method of storing CMYK image data internally, I create a collection of layers, one for each channel, and use a custom save routine to create a CMYK TIFF from the layers. The plugin can be found here: http://www.blackfiveservices.co.uk/separate.shtml While there's plenty of room for improvement, the plugin as it stands (with its source code) may give you some insight into what would be required for a more permanent solution... All the best, -- Alastair M. Robinson Email: [EMAIL PROTECTED] -- You know you've been hacking too long when... ...you wake up at 3:00am from a nightmare, and realize the reason for it: There is no #include stdio.h in the beginning of the dream!!! This realized, back to restful sleep... ___ Gimp-developer mailing list [EMAIL PROTECTED] http://lists.xcf.berkeley.edu/mailman/listinfo/gimp-developer
Re: [Gimp-developer] Fwd: [GUG] CMYK under Gimp.
Hi, Joao S. O. Bueno [EMAIL PROTECTED] writes: http://www.blackfiveservices.co.uk/separate.shtml I am pointing people at this plug-in for quite a while already. I hacked together a plugin some time ago that uses the LCMS colour-management library to convert images from RGB to CMYK, using ICC profiles. Since the GIMP currently has no method of storing CMYK image data internally, I create a collection of layers, one for each channel, and use a custom save routine to create a CMYK TIFF from the layers. I'd love to see the ability to convert to CMYK on save being added to the standard tiff plug-in. A naive CMYK conversion function is now in libgimpcolor but to make this really useful, the conversion should use color profiles, so this should probably be done using lcms. It should be goal for GIMP-2.2 to add a framework for handling color profiles. Not only the TIFF plug-in would benefit from this. I know that work is being done on a display filter for color proofing. For this filter to be convenient and useful we will need a general way to select color profiles and to attach them to images. And we will have to improve the color display filter framework. This is working but there's quite some room for improvement here. At the moment our TIFF plug-in already reads ICC profiles and attaches to the image using the icc-profile parasite (see devel-docs/parasites.txt). If I remember correctly it also writes the profile back to the TIFF file when saving. This parasite should be used by other plug-ins as well. The CMYK color selector we have is also a module and be exchanged by an improved version that uses color profiles. So basically the infrastructure is there that enables some basic CMYK support to be added now without touching the GIMP core. Someone or a group of people could try to come up with a CMYK extension package for GIMP-2.0. I imagine this as a package that contains a number of plug-ins replacing the standard file plug-ins for CMYK-aware formats, a CMYK color selector module and a number of color correction filters. If these plug-ins and modules all use lcms and share ICC profiles by means of gimprc and parasites, you could use GIMP to work on CMYK data even though it stores the data as RGB internally. This is of course limited CMYK support only but it would bring us a good way closer to it and I have been told that it should be sufficient for a lot of tasks, There are however one or two changes needed to the current module API. Right now the modules have no way to access image parasites. Adding this would probably be small hack only. If someone comes up with such a patch quickly, perhaps we could even sneak it into 2.0 somehow. Sven ___ Gimp-developer mailing list [EMAIL PROTECTED] http://lists.xcf.berkeley.edu/mailman/listinfo/gimp-developer
