From: Marco <homerow@lavabit.com>
To: mailing list for ConTeXt users <ntg-context@ntg.nl>
Subject: Re: drops module (draft)
Date: Thu, 6 Dec 2012 19:35:19 +0100 [thread overview]
Message-ID: <20121206183519.GA26897@homerow> (raw)
In-Reply-To: <alpine.LNX.2.02.1212061254240.11206@ybpnyubfg.ybpnyqbznva>
On 2012–12–06 Aditya Mahajan wrote:
> I always thought that shadows were possible to do in PDF (after all
> TikZ does it using some type of PDF primitives).
It is. I use MetaPost to draw the shadows using the shading
mechanism:
withshading("circular", urcorner bottom_left, urcorner bottom_left, radius, 0)
withfromshadecolor \MPcolor{c:transparent}
withtoshadecolor col;
and it works well if placed in an overlay. However, I did not manage
to get it working in TikZ, it could not display shadings to
transparent colours (which is very handy for slides where the
shadings might overlay graphics with a non-uniform colour).
> Since you are the PDF expert, I am interested in knowing why you
> choose to go the ImageMagic route.
From my experience shadows made from MetaPost shadings (which uses
PDF shadings, I assume) are quite low level. It's harder to get the
angle, distance and shadow size correctly implemented. I think the
ImageMagick shadings are more high level and ready to use.
Marco
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next prev parent reply other threads:[~2012-12-06 18:35 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-06 17:08 Peter Rolf
2012-12-06 18:05 ` Aditya Mahajan
2012-12-06 18:18 ` Wolfgang Schuster
2012-12-07 12:01 ` Peter Rolf
2012-12-07 12:57 ` Wolfgang Schuster
2012-12-06 18:35 ` Marco [this message]
2012-12-06 19:46 ` Hans Hagen
2012-12-07 12:04 ` Peter Rolf
2012-12-07 12:49 ` Marco Patzer
2012-12-07 13:27 ` Peter Rolf
2012-12-06 19:05 ` Hans Hagen
2012-12-06 19:44 ` Hans Hagen
2012-12-07 11:59 ` Peter Rolf
2012-12-07 18:02 ` Otared Kavian
2012-12-07 20:53 ` Hans Hagen
2012-12-08 13:03 ` Peter Rolf
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