* unwanted rgb-->gray conversion (mkiv)
@ 2009-01-27 17:32 Peter Rolf
2009-02-02 13:38 ` Peter Rolf
2009-02-03 15:22 ` Peter Rolf
0 siblings, 2 replies; 9+ messages in thread
From: Peter Rolf @ 2009-01-27 17:32 UTC (permalink / raw)
To: mailing list for ConTeXt users
[-- Attachment #1: Type: text/plain, Size: 302 bytes --]
Hi Hans,
The attached example works fine with mkii (text and gfx both use RGB
colors). Using mkiv reduces the colorspace of the graphic to GRAY.
Sadly PDFX/-4 doesn't allow to mix color profiles of colorspace RGB with
GRAY ones. So I'm forced to always use the RGB colorspace...
Best wishes, Peter
[-- Attachment #2: reduction.tex --]
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\setupcolors[state=start]
\definecolor[rgbgray] [r=.5,g=.5,b=.5]
\startuniqueMPgraphic{foo}{size}
fill unitsquare xyscaled(\MPvar{size},\MPvar{size}) withcolor \MPcolor{rgbgray};
\stopuniqueMPgraphic
\starttext
\uniqueMPgraphic{foo}{size=5cm}
\color[rgbgray] Gray text.
\stoptext
[-- Attachment #3: Type: text/plain, Size: 487 bytes --]
___________________________________________________________________________________
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maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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___________________________________________________________________________________
^ permalink raw reply [flat|nested] 9+ messages in thread* Re: unwanted rgb-->gray conversion (mkiv) 2009-01-27 17:32 unwanted rgb-->gray conversion (mkiv) Peter Rolf @ 2009-02-02 13:38 ` Peter Rolf 2009-02-02 21:30 ` Wolfgang Schuster 2009-02-03 15:22 ` Peter Rolf 1 sibling, 1 reply; 9+ messages in thread From: Peter Rolf @ 2009-02-02 13:38 UTC (permalink / raw) To: mailing list for ConTeXt users [-- Attachment #1: Type: text/plain, Size: 1054 bytes --] Peter Rolf schrieb: > Hi Hans, > > The attached example works fine with mkii (text and gfx both use RGB > colors). Using mkiv reduces the colorspace of the graphic to GRAY. > Sadly PDFX/-4 doesn't allow to mix color profiles of colorspace RGB > with GRAY ones. So I'm forced to always use the RGB colorspace... > > Best wishes, Peter > ------------------------------------------------------------------------ > > ___________________________________________________________________________________ > If your question is of interest to others as well, please add an entry to the Wiki! > > maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context > webpage : http://www.pragma-ade.nl / http://tex.aanhet.net > archive : https://foundry.supelec.fr/projects/contextrev/ > wiki : http://contextgarden.net > ___________________________________________________________________________________ mh, the problem is a little more complex. Mkii reduces rgb(0,0,0) text into gray(0), in mkiv color is as expected. Updated the example... [-- Attachment #2: reduction.tex --] [-- Type: text/plain, Size: 933 bytes --] \setupcolors[state=start] % all colors are in RGB color space (and should stay there) \definecolor[rgbgray] [r=.5,g=.5,b=.5] \definecolor[rgbblack] [r=0,g=0,b=0] \definecolor[rgbwhite] [r=1,g=1,b=1] \startuniqueMPgraphic{foo}{size,color} fill unitsquare xyscaled(\MPvar{size},\MPvar{size}) withcolor \MPvar{color}; draw boundingbox currentpicture withcolor \MPcolor{rgbblack}; \stopuniqueMPgraphic \starttext \uniqueMPgraphic{foo}{size=2.5cm,color=rgbgray} % unwanted gray conversion (mkiv) \uniqueMPgraphic{foo}{size=2.5cm,color=rgbblack} % unwanted gray conversion (mkiv) \uniqueMPgraphic{foo}{size=2.5cm,color=rgbwhite} % unwanted gray conversion (mkiv) \color[rgbgray] Gray text. % ok \blank \color[rgbblack] Black text. % unwanted gray conversion (mkii) \blank \framed[background=color,backgroundcolor=rgbblack,foregroundcolor=rgbwhite] {White text} % unwanted gray conversion of background color (mkii) \stoptext [-- Attachment #3: Type: text/plain, Size: 487 bytes --] ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : https://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: unwanted rgb-->gray conversion (mkiv) 2009-02-02 13:38 ` Peter Rolf @ 2009-02-02 21:30 ` Wolfgang Schuster 2009-02-03 10:46 ` Peter Rolf 0 siblings, 1 reply; 9+ messages in thread From: Wolfgang Schuster @ 2009-02-02 21:30 UTC (permalink / raw) To: mailing list for ConTeXt users Am 02.02.2009 um 14:38 schrieb Peter Rolf: > mh, the problem is a little more complex. Mkii reduces rgb(0,0,0) > text into gray(0), in mkiv color is as expected. > Updated the example... > \setupcolors[state=start] AFAIR \setupcolors[state=start,conversion=no] Wolfgang ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : https://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: unwanted rgb-->gray conversion (mkiv) 2009-02-02 21:30 ` Wolfgang Schuster @ 2009-02-03 10:46 ` Peter Rolf 2009-02-03 11:26 ` Wolfgang Schuster 0 siblings, 1 reply; 9+ messages in thread From: Peter Rolf @ 2009-02-03 10:46 UTC (permalink / raw) To: mailing list for ConTeXt users Wolfgang Schuster schrieb: > > Am 02.02.2009 um 14:38 schrieb Peter Rolf: > >> mh, the problem is a little more complex. Mkii reduces rgb(0,0,0) >> text into gray(0), in mkiv color is as expected. >> Updated the example... >> \setupcolors[state=start] > > AFAIR \setupcolors[state=start,conversion=no] > I get exactly the same unwanted conversions in both marks (even if I use 'conversion=yes'). > Wolfgang > > ___________________________________________________________________________________ > > If your question is of interest to others as well, please add an entry > to the Wiki! > > maillist : ntg-context@ntg.nl / > http://www.ntg.nl/mailman/listinfo/ntg-context > webpage : http://www.pragma-ade.nl / http://tex.aanhet.net > archive : https://foundry.supelec.fr/projects/contextrev/ > wiki : http://contextgarden.net > ___________________________________________________________________________________ > > ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : https://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: unwanted rgb-->gray conversion (mkiv) 2009-02-03 10:46 ` Peter Rolf @ 2009-02-03 11:26 ` Wolfgang Schuster 2009-02-03 12:12 ` Peter Rolf 0 siblings, 1 reply; 9+ messages in thread From: Wolfgang Schuster @ 2009-02-03 11:26 UTC (permalink / raw) To: mailing list for ConTeXt users Am 03.02.2009 um 11:46 schrieb Peter Rolf: > Wolfgang Schuster schrieb: >> >> Am 02.02.2009 um 14:38 schrieb Peter Rolf: >> >>> mh, the problem is a little more complex. Mkii reduces rgb(0,0,0) >>> text into gray(0), in mkiv color is as expected. >>> Updated the example... >>> \setupcolors[state=start] >> >> AFAIR \setupcolors[state=start,conversion=no] > > I get exactly the same unwanted conversions in both marks (even if > I use 'conversion=yes'). The rgb(0,0,0) to gray(0) is hard coded in the \definecolor command, can you try if this did also happen with nonzero values for rgb (+conversion=no). Wolfgang ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : https://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: unwanted rgb-->gray conversion (mkiv) 2009-02-03 11:26 ` Wolfgang Schuster @ 2009-02-03 12:12 ` Peter Rolf 2009-02-03 12:30 ` Wolfgang Schuster 0 siblings, 1 reply; 9+ messages in thread From: Peter Rolf @ 2009-02-03 12:12 UTC (permalink / raw) To: mailing list for ConTeXt users Wolfgang Schuster schrieb: > > Am 03.02.2009 um 11:46 schrieb Peter Rolf: > >> Wolfgang Schuster schrieb: >>> >>> Am 02.02.2009 um 14:38 schrieb Peter Rolf: >>> >>>> mh, the problem is a little more complex. Mkii reduces rgb(0,0,0) >>>> text into gray(0), in mkiv color is as expected. >>>> Updated the example... >>>> \setupcolors[state=start] >>> >>> AFAIR \setupcolors[state=start,conversion=no] >> >> I get exactly the same unwanted conversions in both marks (even if I >> use 'conversion=yes'). > > The rgb(0,0,0) to gray(0) is hard coded in the \definecolor > command, can you try if this did also happen with nonzero values > for rgb (+conversion=no). > Thanks Wolfgang. The gray scales white and a 50% gray are already part of my example (and they work fine). Just add '\pdfcompresslevel0' at the top of my example and you can 'see' (viewing the pdf in a text editor) the used color space. 0 g 0 G gray black 0 0 0 rg 0 0 0 RG rgb black > Wolfgang > > ___________________________________________________________________________________ > > If your question is of interest to others as well, please add an entry > to the Wiki! > > maillist : ntg-context@ntg.nl / > http://www.ntg.nl/mailman/listinfo/ntg-context > webpage : http://www.pragma-ade.nl / http://tex.aanhet.net > archive : https://foundry.supelec.fr/projects/contextrev/ > wiki : http://contextgarden.net > ___________________________________________________________________________________ > > ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : https://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: unwanted rgb-->gray conversion (mkiv) 2009-02-03 12:12 ` Peter Rolf @ 2009-02-03 12:30 ` Wolfgang Schuster 2009-02-03 14:05 ` Peter Rolf 0 siblings, 1 reply; 9+ messages in thread From: Wolfgang Schuster @ 2009-02-03 12:30 UTC (permalink / raw) To: mailing list for ConTeXt users Am 03.02.2009 um 13:12 schrieb Peter Rolf: > Thanks Wolfgang. The gray scales white and a 50% gray are already > part of my example (and they work fine). > Just add '\pdfcompresslevel0' at the top of my example and you can > 'see' (viewing the pdf in a text editor) the used color space. > > 0 g 0 G gray black > 0 0 0 rg 0 0 0 RG rgb black Add \let\colorZpattern\colorRpattern to your file. Wolfgang ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : https://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: unwanted rgb-->gray conversion (mkiv) 2009-02-03 12:30 ` Wolfgang Schuster @ 2009-02-03 14:05 ` Peter Rolf 0 siblings, 0 replies; 9+ messages in thread From: Peter Rolf @ 2009-02-03 14:05 UTC (permalink / raw) To: mailing list for ConTeXt users Wolfgang Schuster schrieb: > > Am 03.02.2009 um 13:12 schrieb Peter Rolf: > >> Thanks Wolfgang. The gray scales white and a 50% gray are already >> part of my example (and they work fine). >> Just add '\pdfcompresslevel0' at the top of my example and you can >> 'see' (viewing the pdf in a text editor) the used color space. >> >> 0 g 0 G gray black >> 0 0 0 rg 0 0 0 RG rgb black > > Add \let\colorZpattern\colorRpattern to your file. > Yep, this (kind of) fixes the unwanted conversion in mkii. The conversion of the mp colors in mkiv remains. Anyhow, this is nothing urgent, but things should be fixed (a conversion should be optional). Thanks again for your effort. Best wishes, Peter > Wolfgang > > ___________________________________________________________________________________ > > If your question is of interest to others as well, please add an entry > to the Wiki! > > maillist : ntg-context@ntg.nl / > http://www.ntg.nl/mailman/listinfo/ntg-context > webpage : http://www.pragma-ade.nl / http://tex.aanhet.net > archive : https://foundry.supelec.fr/projects/contextrev/ > wiki : http://contextgarden.net > ___________________________________________________________________________________ > > ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : https://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: unwanted rgb-->gray conversion (mkiv) 2009-01-27 17:32 unwanted rgb-->gray conversion (mkiv) Peter Rolf 2009-02-02 13:38 ` Peter Rolf @ 2009-02-03 15:22 ` Peter Rolf 1 sibling, 0 replies; 9+ messages in thread From: Peter Rolf @ 2009-02-03 15:22 UTC (permalink / raw) To: mailing list for ConTeXt users Peter Rolf schrieb: > Hi Hans, > > The attached example works fine with mkii (text and gfx both use RGB > colors). Using mkiv reduces the colorspace of the graphic to GRAY. > Sadly PDFX/-4 doesn't allow to mix color profiles of colorspace RGB > with GRAY ones. So I'm forced to always use the RGB colorspace... > Final note: I must admit, that my conclusion is BS (also the reason why the problem is not urgent any more). You can't combine RGB and GRAY color profiles as output intents (IO) in PDF/X-4. But the usage of different colorspaces in the document (like RGB+GRAY) and the IO (like CMYK) is valid. So no need for any color conversion. My error in reasoning... > Best wishes, Peter > ------------------------------------------------------------------------ > > ___________________________________________________________________________________ > If your question is of interest to others as well, please add an entry to the Wiki! > > maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context > webpage : http://www.pragma-ade.nl / http://tex.aanhet.net > archive : https://foundry.supelec.fr/projects/contextrev/ > wiki : http://contextgarden.net > ___________________________________________________________________________________ ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : https://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 9+ messages in thread
end of thread, other threads:[~2009-02-03 15:22 UTC | newest] Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2009-01-27 17:32 unwanted rgb-->gray conversion (mkiv) Peter Rolf 2009-02-02 13:38 ` Peter Rolf 2009-02-02 21:30 ` Wolfgang Schuster 2009-02-03 10:46 ` Peter Rolf 2009-02-03 11:26 ` Wolfgang Schuster 2009-02-03 12:12 ` Peter Rolf 2009-02-03 12:30 ` Wolfgang Schuster 2009-02-03 14:05 ` Peter Rolf 2009-02-03 15:22 ` Peter Rolf
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