From: Hans Hagen <pragma@wxs.nl>
To: ntg-context@ntg.nl
Subject: Re: nested colors problem
Date: Sat, 21 Jan 2017 11:11:14 +0100 [thread overview]
Message-ID: <ef76bfd3-f3ea-5786-ade2-09053918d9a2@wxs.nl> (raw)
In-Reply-To: <49805c4d-2f7e-469d-a04f-23d2b94996c1@gmx.net>
On 1/20/2017 9:42 PM, Peter Rolf wrote:
> Hi,
>
> the nested color inherits the transparency from it's surrounding color.
>
> \definecolor[colA] [r=0,g=0,b=0.01,t=0.2,a=1] % transparent
> \definecolor[colB] [r=.278431,g=.235294,b=.545098] % opaque
>
> \starttext
> \startcolor[colA]
> \definedfont[SansBold at 96bp]Titanfall\,
> \startcolor[colB]2\stopcolor
> \stopcolor
> \stoptext
>
>
> ConTeXt version: 2014.11.26 21:43
>
> Maybe intended behaviour, maybe a bug. Donno.
colorspace, color and transparency are different axis
\definecolor[colX] [r=.5]
\definecolor[colY] [t=.5,a=1]
\starttext
\startbuffer
\dontleavehmode
\blackrule[color=colX,width=3cm]\hskip-1.5cm
\blackrule[color=colY,width=3cm]
\stopbuffer
\getbuffer \par \color[colY]{\getbuffer}
\setupcolors[rgb=no]
\getbuffer \par \color[colY]{\getbuffer}
\setupcolors[rgb=no,cmyk=no]
\getbuffer \par \color[colY]{\getbuffer}
\stoptext
it just happens that coming from mkii colors can have transparencies
as Alan says: they are different things (also in metafun)
\startMPcode
fill fullcircle scaled 4cm
withcolor "red" ;
fill fullcircle scaled 3cm
withtransparency (1,0.5) ;
fill fullcircle scaled 2cm
withcolor "green"
withtransparency (1,0.5) ;
\stopMPcode
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next prev parent reply other threads:[~2017-01-21 10:11 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-20 20:42 Peter Rolf
2017-01-20 20:54 ` Alan Braslau
2017-01-20 21:26 ` Peter Rolf
2017-01-20 22:12 ` Henning Hraban Ramm
2017-01-20 23:48 ` Peter Rolf
2017-01-21 10:11 ` Hans Hagen [this message]
2017-01-21 13:37 ` Peter Rolf
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