Re: A better \definesymbol sought

[Hans Hagen <pragma@wxs.nl>]

On 1/24/2017 8:01 PM, Rik Kabel wrote:
> On 2017-01-24 03:34, Hans Hagen wrote:
>> On 1/24/2017 4:04 AM, Rik wrote:
>>>
>>> What I want is that the background of the page (yellow in this case)
>>> should show through. That is what is done with fill / reverse / cycle,
>>> as in:
>>>
>>>     \setupbackgrounds
>>>       [page]
>>>       [background=color,backgroundcolor=yellow]
>>>     \startuseMPgraphic{CircleTest}
>>>       path p,q ;
>>>       p := fullcircle scaled 2cm ;
>>>       q := fullcircle scaled 1cm ;
>>>       fill p -- reverse q -- cycle withcolor blue;
>>>     \stopuseMPgraphic
>>>     \starttext
>>>      \useMPgraphic{CircleTest}
>>>     \stoptext
>>>
>>> where the background color (yellow) comes through the inner circle
>>> (path q).
>>>
>>> Can this be done with text characters? I suspect that the answer is that
>>> the glyphs have to be converted to paths and that it will only work when
>>
>> \setupbackgrounds
>>   [page]
>>   [background=color,
>>    backgroundcolor=yellow]
>> \starttext
>>     \startcolor[blue]\starteffect[outer]PQR\stopeffect\stopcolor
>> \stoptext
>
>
> Still not there.
>
> Is there a way to define the ? characters to remove their coloring in
> the output of the following so that the background yellow appears
> through the outline even within the portions of the ?s placed on the
> blue heart? I want to be able to place this over arbitrary text and
> color backgrounds (stencil-like) so that the arbitrary text and
> background color shows through.
>
>
>
>     \setupbackgrounds
>       [page]
>       [background={color,bgtext},backgroundcolor=yellow]
>     \definelayer
>       [bgtext]
>       [x=1in,
>        y=2.0in,
>        state=start]
>     \setlayerframed
>       [bgtext]
>       {\setupbodyfont[36pt]@@@}
>     \definefont
>       [DVSrB]
>       [file:DejaVuSerif-Bold.ttf]
>     \startbuffer[Outer]
>      \startcolor[blue]
>        \starteffect
>          [outer]
>          {\DVSrB ???}
>        \stopeffect
>      \stopcolor
>     \stopbuffer
>     \startuseMPgraphic{HeartTest}
>       picture h,q ;
>       h := "♥" infont "\truefontname{DejaVuSerif-Bold.ttf}" scaled 5 ;
>       q := textext("{\getbuffer[Outer]}") scaled 3 ;
>       draw h withcolor blue ;
>       draw q ;
>     \stopuseMPgraphic
>     \starttext
>     \starttext
>      \useMPgraphic{HeartTest}
>     \stoptext

\setupbackgrounds
   [page]
   [background={color,bgtext},
    backgroundcolor=yellow]

\definelayer
   [bgtext]
   [x=1in,
    y=2.0in,
    state=start]

\setlayerframed
   [bgtext]
   {\setupbodyfont[36pt]@@@}

\definefont
   [DVSrB]
   [file:DejaVuSerif-Bold.ttf*default]

\startuseMPgraphic{HeartTest}
     draw outlinetext.f
         ("\DVSrB ♥")
         (withcolor red)
         scaled 5 ;
     draw outlinetext.b
         ("\DVSrB ???")
         (withcolor yellow)
         (withcolor blue)
         scaled 3 ;
\stopuseMPgraphic

\starttext
     \useMPgraphic{HeartTest}
\stoptext

-- 

-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
        tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
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