Am 2019-03-19 um 16:34 schrieb Hans Hagen <j.ha...@xs4all.nl>: > On 3/19/2019 4:23 PM, Henning Hraban Ramm wrote: >> Am 2019-03-19 um 13:23 schrieb Hans Hagen <j.ha...@xs4all.nl>: >>> On 3/18/2019 7:45 PM, Henning Hraban Ramm wrote: >>> from one of the manuals ... >>> >>> \starttext >>> >>> \definecolor [my-blue] [c=1,m=.38,y=0,k=.64] % pms 2965 uncoated m >>> \definecolor [my-yellow] [c=0,m=.28,y=1,k=.06] % pms 124 uncoated m >>> >>> \definespotcolor [my-blue-100] [my-blue] [p=1] >>> \definespotcolor [my-yellow-100] [my-yellow] [p=1] >>> \definespotcolor [my-blue-50] [my-blue] [p=.5] >>> \definespotcolor [my-yellow-50] [my-yellow] [p=.5] >>> >>> \definemultitonecolor [my-mix] [my-blue=.12,my-yellow=.28] >>> [c=.1,m=.1,y=.3,k=.1] >> So it works only with toned or multitone colors and only with _some_ >> greyscale pictures, not with bitmaps and also not with my greyscale dodo. > > It uses an indexed (256 so one byte) image ... coloring a cow is no option > anyway as there the pdf object is an independent thing (i could probably > inject color directives if needed but that could then interfere with the way > such a pdf stream is set up.
I didn’t expect PDF to work (I remember colored cows, but those were probably MP), and I must analyze why your greyscale PNG works and not mine. >> I can also only use one version my-blue – if I use my-blue-100, then >> my-blue-50 stays grey, and if I only use my-blue-50, it’s the same tone as >> 100. >> Something’s very fishy. > Could be but it's actually more a gimmick as we can't really mess to much > with the internals of images (they can have masks, palettes, etc etc). Understood. But colorizing grey pictures is a nice feature that I’m used to use in InDesign (and in QuarkXPress earlier). > Later this year there might be other tricks on our sleeves but I'm not going > to touch the code now. I’m looking forward to those. Since I’m working at my ConTeXt book again, I’m researching which parameters and features actually work and how. This looks like a case that I won’t include in the book but only document in the wiki. Greetlings, Hraban --- https://www.fiee.net http://wiki.contextgarden.net https://www.dreiviertelhaus.de GPG Key ID 1C9B22FD ___________________________________________________________________________________ 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://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : http://contextgarden.net ___________________________________________________________________________________
