From: "Procházka Lukáš Ing." <LPr@pontex.cz>
To: "mailing list for ConTeXt users" <ntg-context@ntg.nl>
Subject: Re: Pdf info with Lua/Ctx API
Date: Tue, 15 Aug 2017 14:08:58 +0200 [thread overview]
Message-ID: <op.y40hc8zr62epfj@lprx> (raw)
In-Reply-To: <2b0ca8a5-f92a-234f-387a-8b99d7a2d5e8@wxs.nl>
Hello Hans,
that's exactly what I've been looking for!
(And yes, I've asked one or more times, with a solution that seemed to me a bit "forced" or "non-clear", so the latest solution looks perfectly!)
Best regards,
Lukas
On Mon, 14 Aug 2017 16:55:09 +0200, Hans Hagen <pragma@wxs.nl> wrote:
> On 8/14/2017 1:08 PM, Procházka Lukáš Ing. wrote:
>> Hello,
>>
>> is there a way how to get the following info from a PDF file via Lua/Ctx
>> API?:
>>
>> - first: number of pages of the PDF,
>>
>> - next: for each page: get width, height and orientation
>> (portrait/landscape) or rotation (+90,+ 180, +270 or so) of i-th page.
>
> this probably has come up several times now, anyway
>
>
> \getfiguredimensions[test.pdf]
> \dorecurse {\noffigurepages} {
> \getfiguredimensions[test.pdf][page=#1]
> \figurenaturalwidth
> ,\figurenaturalheight,\figureorientation,\figurerotation\par
> }
>
> in lua you can either use the img library (see luatex manual) or context
> helpers
>
> local data = figures.push("foo.pdf")
> figures.identify()
> figures.check()
> figures.pop()
> inspect(data)
>
> i'll add:
>
> function figures.getinfo(name,page)
> if type(name) == "string" then
> name = { name = name, page = page }
> end
> if name.name then
> local data = figures.push(name)
> figures.identify()
> figures.check()
> figures.pop()
> return data
> end
> end
>
> so that one can do
>
> local n = "ms.pdf"
> local d = figures.getinfo(n)
>
> if d then
> for i=1,d.used.pages do
> local p = figures.getinfo(n,i)
> if p then
> local u = p.used
> print(u.width,u.height,u.orientation)
> end
> end
> end
>
> etc etc
>
>
--
Ing. Lukáš Procházka | mailto:LPr@pontex.cz
Pontex s. r. o. | mailto:pontex@pontex.cz | http://www.pontex.cz | IDDS:nrpt3sn
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147 14 Praha 4
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next prev parent reply other threads:[~2017-08-15 12:08 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-14 11:08 Procházka Lukáš Ing.
2017-08-14 14:55 ` Hans Hagen
2017-08-15 12:08 ` Procházka Lukáš Ing. [this message]
2017-08-16 10:11 ` Procházka Lukáš Ing.
2017-08-16 11:57 ` Wolfgang Schuster
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