On Sat, Nov 1, 2008 at 1:38 AM, Renaud Aubin <[EMAIL PROTECTED]> wrote:
> Hi,
>
> I have some trouble using a gradient background (solid) with a
> transparent element :
>
> \startMPinclusions
> def test_shade (expr a, b) =
> pickup pencircle scaled 1mm ;
> color ca ; ca := \MPcolor{a} ;
> color cb ; cb := \MPcolor{b} ;
> color cc ; cc := \MPcolor{c} ;
> sh := define_linear_shade(origin
> shifted(0cm,.5*\overlayheight),origin,ca,cb) ;
> fill fullsquare xscaled \overlaywidth yscaled \overlayheight
> withshade sh;
> draw origin withcolor cc;
> draw origin shifted(0cm,-.25*\overlayheight) withcolor cc;
> enddef ;
> \stopMPinclusions
>
> \setupcolors[state=start]
> \definecolor[a][r=.57254902,g=.784313725,b=.917647059]
> \definecolor[b][white]
> \definecolor[c][darkred]
> \starttext
>
> \defineoverlay[bgoverlay][\uniqueMPgraphic{bg_top_shade}]
> \setupbackgrounds[page][background=bgoverlay]
> \startuniqueMPgraphic{bg_top_shade}
> test_shade(origin, origin shifted(0cm,1cm));
> draw fullcircle scaled 10cm shifted (0cm,0.25*\overlayheight)
> withcolor transparent(1,0.5,white) withpen pencircle scaled 2cm;
>
> %%%%%%%% If you comment out the previous line the color rendering is
> definitelly different...
>
> \stopuniqueMPgraphic
>
> \input knuth
>
> \stoptext
>
This is my test.
Where is the problem ?
minimals-beta
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test-renoud.pdf
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