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From: Garulfo <garulfo@azules.eu>
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Subject: drop shadows with metapost/ metafun
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Which process would you advice to add =C2=AB drop shadows =C2=BB to any kind=
 of metafun / metapost figures like:
picture p;
p :=3D textext("MetaPost is fun!") shifted (10cm,10cm);

My current understanding of the required steps :


1- fill p with the shadow color

2- write it to an external metapost file (with savebuffer ?) ready for png e=
xport (outputformat :=3D "png =C2=BB;)

3- with lua, os.execute, and imagemagick prepare the shadow
  - extent the png file with a transparent background, to have room for blur=
ring=20
  - blur it

4- import this png in context / Metapost (externalfigure), and center it wit=
h p figure

5- shift it according to the desired shadows distance and angle

6- apply the initial bounding box of p to the shadow, draw the shadow, draw t=
he p picture=20


Actually, all this seems long and tedious, and contrasts with the already ex=
isting links between MetaPost / MetaFun and cairo + libpng.

Thanks again for your help.=

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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto"><span style=3D"font-family: -webkit-standar=
d; font-size: medium; -webkit-text-size-adjust: auto;">Which process would y=
ou advice to add =C2=AB drop shadows&nbsp;=C2=BB to any kind of metafun / me=
tapost figures like:</span><div class=3D"" style=3D"-webkit-text-size-adjust=
: auto;"><pre class=3D"tex"><pre class=3D"tex">picture p;
p :=3D textext("MetaPost is fun!") shifted (10cm,10cm);

</pre><div class=3D"">My current understanding of the required steps :</div>=
<div class=3D""><br></div><div class=3D""><br></div><div class=3D"">1- fill p=
 with the shadow color</div><div class=3D""><br></div><div class=3D"">2- wri=
te it to an external metapost file (with savebuffer ?) ready for png export (=
<em class=3D"">outputformat</em> :=3D "<em class=3D"">png</em>&nbsp;=C2=BB;)=
</div><div class=3D""><br></div><div class=3D"">3- with lua, os.execute, and=
 imagemagick prepare the shadow</div><div class=3D"">  - extent the png file=
 with a transparent background, to have room for blurring </div><div class=3D=
"">  - blur it</div><div class=3D""><br></div><div class=3D"">4- import this=
 png in context / Metapost (externalfigure), and center it with p figure</di=
v><div class=3D""><br></div><div class=3D"">5- shift it according to the des=
ired shadows distance and angle</div><div class=3D""><br></div><div class=3D=
"">6- apply the initial bounding box of p to the shadow, draw the shadow, dr=
aw the p picture </div><div class=3D""><br class=3D""></div><div class=3D"">=
<br class=3D""></div><div class=3D"">Actually, all this seems long and tedio=
us, and contrasts with the already existing links between&nbsp;MetaPost / Me=
taFun and cairo + libpng.</div></pre></div><div><br></div><div>Thanks again f=
or your help.</div></body></html>=

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