Re: color check

[luigi scarso <luigi.scarso@gmail.com>]

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On Thu, Dec 6, 2018 at 10:55 AM Floris van Manen <vm@klankschap.nl> wrote:

> while experimenting with the sample transparency color code
>
>
> \definecolor [transparentred]  [r=1,t=.5,a=1]
> \definecolor [transparentblue] [b=1,t=.5,a=1]
> \definecolor [solidyellow]  [y=1,t=1,a=1]
>
> \starttext
>
> \startTEXpage
> ~This is some sample text that goes behind the rectangles\hskip-80mm
> \blackrule[width=18mm,height=10mm,depth=10mm,color=solidyellow]\hskip-6mm
> \blackrule[width=18mm,height=20mm,depth=1mm,color=transparentred]\hskip-6mm
>
> \blackrule[width=18mm,height=10mm,depth=10mm,color=transparentblue]\hskip-6mm
> \blackrule[width=18mm,height=20mm,depth=1mm,color=solidyellow]\hskip27mm
> \stopTEXpage
>
> \stoptext
>
>
>
> i get the intended result.
>
>
> if i change the yellow t value to .99
> \definecolor [solidyellow]  [y=1,t=0.99,a=1]
> some green layer pops up.
>
>
> as this is all about software, there is a reason to this.
> it cold be the OSX preview program too, of course.
> can someone explain to me ?
> :-)
>
> here is ok under ubuntu
Can you convert pdf to png ? This should show almost the same png.

You can also prepend
\nopdfcompression
and post the pdf.

\nopdfcompression
\definecolor [transparentred]  [r=1,t=.5,a=1]
\definecolor [transparentblue] [b=1,t=.5,a=1]
\definecolor [solidyellow]  [y=1,t=1,a=1]

\starttext

\startTEXpage
\definecolor [solidyellow]  [y=1,t=1,a=1]
~This is some sample text that goes behind the rectangles\hskip-80mm
\blackrule[width=18mm,height=10mm,depth=10mm,color=solidyellow]\hskip-6mm
\blackrule[width=18mm,height=20mm,depth=1mm,color=transparentred]\hskip-6mm
\blackrule[width=18mm,height=10mm,depth=10mm,color=transparentblue]\hskip-6mm
\blackrule[width=18mm,height=20mm,depth=1mm,color=solidyellow]\hskip27mm
\stopTEXpage


\startTEXpage
\definecolor [solidyellow]  [y=1,t=0.99,a=1]
~This is some sample text that goes behind the rectangles\hskip-80mm
\blackrule[width=18mm,height=10mm,depth=10mm,color=solidyellow]\hskip-6mm
\blackrule[width=18mm,height=20mm,depth=1mm,color=transparentred]\hskip-6mm
\blackrule[width=18mm,height=10mm,depth=10mm,color=transparentblue]\hskip-6mm
\blackrule[width=18mm,height=20mm,depth=1mm,color=solidyellow]\hskip27mm
\stopTEXpage


\stoptext

-- 
luigi

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