ConTeXt-defined colours broken in TikZ in MkIV with latest betas

Hi, The following example works in MkII and it works in TeX Live 2014, but it fails with the latest beta (it draws a black rectangle instead of using the defined colour): \usemodule[tikz] \starttext \definecolor[mycol][r=0.9,g=0.8,b=0.8] \starttikzpicture \fill[mycol] (0, 0) rectangle (2,4); \stoptikzpicture \stoptext It would be really nice to fix this in time for TeX Live 2015. Thank you, Mojca

On 4/13/2015 7:45 PM, Mojca Miklavec wrote:
Hm, i'm a bit puzzled why some suggested patched are nto in the distribution. Anyway, attached a more modern variant you need a beta that i just uploaded because i found out that when tijz predefines some mixed colors it assumes rgb color space your example then runs ok here Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------

Thanks Hans for the fix!
I have noticed, that spotcolors can be used in tikz, but they are darker.
Is that wanted or a bug?
MWE:
\usemodule[tikz]
\starttext
\definecolor[gruen][c=0.52,y=0.86]
\definespotcolor[mycol][gruen][p=1]
\definespotcolor[mycol_h][gruen][p=0.5]
\definespotcolor[mycol_q][gruen][p=0.25]
\startcolor[mycol]
{\bfa Test Test Test Test Test}
\stopcolor
\starttikzpicture
\fill[mycol] (0, 0) rectangle (2,4);
\fill[mycol_h] (2, 0) rectangle ++(2,4);
\fill[mycol_q] (4, 0) rectangle ++(2,4);
\stoptikzpicture
\stoptext
I expect the first rectangle to have the same color as the (wanted) color
of the text. But the color of the text is closer to the color of the
rectangle in the middle (50%).
Christian
2015-04-13 22:51 GMT+02:00 Hans Hagen

On 4/14/2015 10:29 AM, Christian Prim wrote:
they will map onto cmyk or rgb depending on definitions ... don't expect advanced context color models to work with tikz (but they do work with metafun) Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------

Thanks Hans for clarification. But even with simple context color models
(that worked before) I get other colors.
MWE:
\usemodule[tikz]
\setupbodyfont[40pt]
\starttext
\definecolor[mycol][c=0.23,m=0.58,y=0.88,k=0.45]
\definecolor[mycol_h][c=0.115,m=0.29,y=0.44,k=0.225]
\definecolor[mycol_q][c=0.055,m=0.145,y=0.22,k=0.1125]
\startcolor[mycol]
{\bfa •••••••• Test}
\stopcolor
\starttikzpicture
\fill[mycol] (0, 0) rectangle (2,4);
\fill[mycol_h] (2, 0) rectangle ++(2,4);
\fill[mycol_q] (4, 0) rectangle ++(2,4);
\stoptikzpicture
\stoptext
I'm not so familiar with metafun, so I couldn't do the rectangle with
metafun (the different colors between context/metafun and tikz would
certainly be better visible so). But the bullet shows, that the text color
isn't the same as the tikz-figure. But they should as they are identical.
Something must have changed in color handling.
Christian
2015-04-14 10:42 GMT+02:00 Hans Hagen

Hi Hans
is it correct, that with the new beta one can just use rgb-colors using
tikz or is there a bug preventing the usage of cmyk-colors as it used to
work before?
Thanks!
Christian
PS.: See mail below for MWE showing false cmyk colors in tikz.
2015-04-14 11:54 GMT+02:00 Christian Prim

On 4/16/2015 9:34 PM, Christian Prim wrote:
cmyk should work ok but afaik tikz assumes rgb in some cases so that prohibits that we can do automatic conversion tp other color spaces at he context end
-- ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------

Hi Hans
sorry to ask again. But the different color handling between
context-version before 2015.04.14 00:54 and
context-version 2015.04.14 00:54 is remarkable and annoying.
See attached pdf-documents. Both have exactly the same source:
\usemodule[tikz]
\setupbodyfont[40pt]
\starttext
\definecolor[mycola][c=0.23,m=0.58,y=0.88,k=0.45]
\definecolor[mycolb][c=0.115,m=0.29,y=0.44,k=0.225]
\definecolor[mycolc][c=0.055,m=0.145,y=0.22,k=0.1125]
\starttikzpicture
\node[fill=mycola,rectangle, minimum height=4cm,minimum
width=2cm,anchor=south west] {\startcolor[mycola]T\stopcolor};
\node[fill=mycolb,rectangle, minimum height=4cm,minimum
width=2cm,anchor=south west] at (2,0) {\startcolor[mycolb]T\stopcolor};
\node[fill=mycolc,rectangle, minimum height=4cm,minimum
width=2cm,anchor=south west] at (4,0) {\startcolor[mycolc]T\stopcolor};
\stoptikzpicture
\stoptext
I write in each box the letter T with exactly the same color as the
underlying box. Textcolor is set using context, fill color of the box
is set using tikz.
old.pdf shows the correct color handling. The letter T has exactly the
same color as the box and therefore disappears.
With newest beta (new.pdf) the letter T is visible.
Must I now stay with an old beta or can this "bug" be fixed? Perhaps
it's a bug in tikz...
Thanks
Christian
Am Don, 16. Apr, 2015 um 9:58 schrieb Hans Hagen

On 4/16/2015 11:29 PM, Christian Prim wrote:
i found out that it relates to the lack of gray support (which in fact seems to be rgb support) so the next beta might work ok for you (no upload yet) Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------

Hi Hans
I don't know if the latest beta already has the new code. But I can
confirm, that there is still a difference between tikz-colors and
context/metafun colors.
TikZ translates c=1,m=1 in (native) RGB, that is b=1, which is in some way
correct.
ConTeXt translates c=1,m=1 in something I couldn't really define (perhaps
sRGB or some other color profile) r=0.183... g=0.191... b=0.574... or in
Web-Hex: #2e3092
or back to cmyk: c=.68, m=.67,k=.43 (which is blue with some key-value
compared to TikZ with k=0)
So I think that TikZ and ConTeXt don't use the same color profile....
Hope it could help somewhat to solve my problem.
Thanks
Christian
PS.: New MWE with output.pdf attached.
\usemodule[tikz]
\usetypescript[palatino]
\setupbodyfont[palatino,40pt]
\starttext
\definecolor[mycola][c=1,m=1,y=0,k=0]
\definecolor[mycolb][c=0.5,m=0.5,y=0,k=0]
\definecolor[mycolc][c=0.25,m=0.25,y=0,k=0]
\starttikzpicture
\node[fill=mycola,rectangle, minimum height=4cm,minimum width=2cm]
{\startcolor[mycola]T\stopcolor};
\node[fill=mycolb,rectangle, minimum height=4cm,minimum width=2cm] at (2,0)
{\startcolor[mycolb]T\stopcolor};
\node[fill=mycolc,rectangle, minimum height=4cm,minimum width=2cm] at (4,0)
{\startcolor[mycolc]T\stopcolor};
\stoptikzpicture
\startMPcode
fill fullsquare xscaled 2cm yscaled 4cm withcolor \MPcolor{mycola};
fill fullsquare xscaled 2cm yscaled 4cm xshifted 2cm withcolor
\MPcolor{mycolb};
fill fullsquare xscaled 2cm yscaled 4cm xshifted 4cm withcolor
\MPcolor{mycolc};
\stopMPcode
\par
\startcolor[mycola]T\stopcolor
\startcolor[mycolb]T\stopcolor
\startcolor[mycolc]T\stopcolor
\stoptext
2015-04-17 1:27 GMT+02:00 Hans Hagen

On 4/24/2015 3:05 PM, Christian Prim wrote:
your example works ok here (with the tikz def file i made last week) i also made \setupcolors[cmyk=no] \setupcolors[rgb=no] \setupcolors[cmyk=no,rgb=no] \setupcolors[state=stop] working (nothing needed in tikz as the code that interfaces to it does that) which will be in the next beta Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------
participants (4)
-
Christian Prim
-
Christian Prim
-
Hans Hagen
-
Mojca Miklavec