Re: ntg-context Digest, Vol 99, Issue 40

Re: ntg-context Digest, Vol 99, Issue 40

[pol stra]

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Troy Henderson said:

>I tested this on a black-on-transparent EPS that was created via MetaPost, and it seems to work fine.  If you are not using Linux (or Unix or Mac OS X), let me know and I can probably >put together a quick HTML page to do this on my server.
Thanks for the invitation. Fortunatly I’m using GNU/Linux.


>> cat foo.eps | sed -e "s/0 0 0 setrgbcolor/1 1 1 setrgbcolor/g" > bar.eps

>It simply translates the (0,0,0) triplet (which is black) to the (1,1,1) triplet (which is white).  This is very simplistic and may not do all that you want.

Unfortunatly there is no such a sequence in my file:

grep setrgbcolor a1.EPS 
/setcmykcolor{1 sub 4 1 roll 3{3 index add neg dup 0 lt{pop 0}if 3 1 roll}repeat setrgbcolor pop}wd
/sw/setlinewidth ld/scap/setlinecap ld/sj/setlinejoin ld/sm/setmiterlimit ld/sd/setdash ld/rgb/setrgbcolor ld/crgb/currentrgbcolor ld/cmyk/setcmykcolor ld/gs/gsave ld/gr/grestore ld

But thank you for gave a try.
 		 	   		  

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Re: ntg-context Digest, Vol 99, Issue 40

[Troy Henderson]

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>
> Unfortunatly there is no such a sequence in my file:
>
> grep setrgbcolor a1.EPS
> /setcmykcolor{1 sub 4 1 roll 3{3 index add neg dup 0 lt{pop 0}if 3 1
> roll}repeat setrgbcolor pop}wd
> /sw/setlinewidth ld/scap/setlinecap ld/sj/setlinejoin ld/sm/setmiterlimit
> ld/sd/setdash ld/rgb/setrgbcolor ld/crgb/currentrgbcolor
> ld/cmyk/setcmykcolor ld/gs/gsave ld/gr/grestore ld
>
> But thank you for gave a try.
>

I doubted that it would work, but thought that I would try just the same.
It may still be able to be done by converting it to SVG, editing
(automagically), and then converting back.  If you are able, upload the EPS
to

http://www.tlhiv.org/upload/

and I will place around with it.

Troy

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If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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Re: ntg-context Digest, Vol 99, Issue 40

[Troy Henderson]

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I put together this little utility for converting a color EPS/PDF/SVG to
grayscale.

http://www.tlhiv.org/grayscale/

Selecting "invert" swaps colors from white to black and black to white.
So, using a black/white graphic on a transparent background should
transform it to a white/black graphic on a transparent background.

Testing is certainly necessary.

Troy

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___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
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