On 11/17/2016 9:27 AM, Procházka Lukáš Ing. wrote:

Hello,

two questions about pages in PDF document (slightly refers to the code http://www.mail-archive.com/ntg-context@ntg.nl/msg57502.html):

---- local MyDocument = lpdf.epdf.load("A4.pdf")

context.starttext()

local pages = MyDocument.pages local dummy = MyDocument.pages[1] -- we need lua 5.2 in order to avoid this

local nofpages = #MyDocument.pages

context.starttabulate { "|c|c|c|" }

context.NC() context("page") context.NC() context("width") context.NC() context("height") context.NR()

for i=1, nofpages do local page = pages[i] local bbox = page.CropBox or page.MediaBox context.NC() context(i) context.NC() context(bbox[4]-bbox[2]) context.NC() context(bbox[3]-bbox[1]) context.NR() end

context.stoptabulate()

context.stoptext() ----

The sample gives: w ~ 842 pt, h ~ 595 pt

Questions:

1. Shouldn't be width and height swapped? As the analyzed 'A4.pdf' has width of 210 mm and height of 297 mm, IOW width < height, whilst the cld code gives w > h (?!).

you do that yourself as [3] - [1] is the width while you put it under height

2. Is it possible to get rotation or orientation of the page (be "portrait" or "landscape" or "0" or "90" or so)?

if it's in a dictionary you can locate it query the value

3. Is the 'bbox' already affected by the page rotation/orientation? I mean - in the case page orientation is 90 or 270, is the width and height of 'bbox' swapped compared to the situation if page orientation was 0 (or 180)?

I don't know.

Best regards,

Lukas

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