From: "Mikael P. Sundqvist" <mickep@gmail.com>
To: mailing list for ConTeXt users <ntg-context@ntg.nl>
Subject: Re: resize and center and clip image
Date: Thu, 1 May 2014 15:38:29 +0200 [thread overview]
Message-ID: <CAHy-LL9=UP-tZnesqLbSRHmmUwxps3D-z3H9mYVePVz6cx7H3w@mail.gmail.com> (raw)
In-Reply-To: <CAHy-LL9FQARUMgic1zRjU59kj3zo8=JtsAR2r_M+_gxwpj9rSQ@mail.gmail.com>
OK, sorry for the noise. I think I have the solution:
\startexternalfigurecollection[k.jpg]
\useexternalfigure[k.jpg][k.jpg]
\stopexternalfigurecollection
\externalfigurecollectionminwidth{k.jpg}
\externalfigurecollectionmaxheight{k.jpg}
\clip[width=8cm,height=7cm]{%
\framed[width=8cm,height=7cm,align={middle,lohi},offset=overlay]{%
\dimen0=\externalfigurecollectionminwidth{k.jpg}
\dimen2=\externalfigurecollectionmaxheight{k.jpg}
\dimen4=8cm
\dimen6=7cm
\startluacode
if tex.dimen[0] / tex.dimen[2] < tex.dimen[4] / tex.dimen[6] then
local skalning =
-0.5*(tex.dimen[4]/tex.dimen[0]*tex.dimen[2]-tex.dimen[6])
context("\\vskip%ssp", skalning)
context.externalfigure({"k.jpg"},{width="8cm"})
context.sprint("foo")
else
local skalning =
-0.5*(tex.dimen[6]/tex.dimen[2]*tex.dimen[0]-tex.dimen[4])
context("\\hskip%ssp", skalning)
context.externalfigure({"k.jpg"},{height="7cm"})
context.sprint("bar")
end
\stopluacode
}}
If there are any bad side effects of this or simplifications, please
do not hesitate to tell me :)
/Mikael
On Thu, May 1, 2014 at 1:50 PM, Mikael P. Sundqvist <mickep@gmail.com> wrote:
> Hi!
>
> Assume that I want to fill in the text area with images, and I want to
> clip and scale them according to these rules:
>
> 1) If the image is "too wide" (in sense of proportions), then scale it
> so that the height fits the text area height, center it, and clip it
> to the text area. (See the attached image, on top, where the blue area
> is supposed to show the text area and the red rectangle the image.)
>
> 2) If the image is "too high" (in sense of proportions), then scale it
> so that the width fits the text area width, center it, and clip it to
> the text area. (See the attached image, on bottom.)
>
> The background why I want to do this is that I'm making a small
> template for presentations, and I'd like the users to insert images as
> background without really having to think about if their proportions
> fit or not.
>
> Best regards, Mikael
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next prev parent reply other threads:[~2014-05-01 13:38 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-01 11:50 Mikael P. Sundqvist
2014-05-01 13:38 ` Mikael P. Sundqvist [this message]
2014-05-01 14:59 ` Otared Kavian
2014-05-01 15:07 ` Mikael P. Sundqvist
2014-05-01 16:43 ` Otared Kavian
2014-05-01 18:00 ` Aditya Mahajan
2014-05-01 19:27 ` Mikael P. Sundqvist
2014-05-01 19:31 ` Wolfgang Schuster
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