Re: [NTG-context] error when using externalfigure

26 Nov 2012

      On 11/26/2012 8:54 PM, Dr. Hartmut Henkel wrote:
...
On Mon, 26 Nov 2012, Hans Hagen wrote:
...
On 11/26/2012 10:36 AM, luigi scarso wrote:
...
On Mon, Nov 26, 2012 at 10:20 AM, Pavel Dohnal 
wrote:
...
I have a big context source file which contains pictures from different
sources. The problem is, that there are some pictures the context cannot
process. It displays an error message and ends. I run the context from
another script in batchmode. After finishing, the context creates a PDF
file, which contains this problematic picture but the pdf is broken. It
does
not have numbers in the table of contents and it is not arranged by setup.
Here is a minimal example:
\starttext
\externalfigure[http://cdn-locations-images.tripomatic.com/img-poi1295-5ZTynx-s.jpg][width=26.5mm]
\stoptext
i just tried the minimal example here, it gives a valid PDF with a
properly (afaics) scaled image.
Creator:        ConTeXt - 2012.11.26 13:31
Producer:       LuaTeX-0.70.2
...
...
when I save the jpg  as eps from gimp
I see
width = 6096,00
height=4064,00
tried, can't see here.
...
...
The first value is off for TeX.
if i print the values from the img object i get
17344.8pt
11563.2pt
so the problem is deep down in the jpg reader ... the image is crippled in the
sense that it has no valid resolution information
something for hartmut to check in the img lib
can't confirm. Is this solved already?
the latest beta clips ... something:

local maxdimen = 2^30-1

function img.check(figure)
     if figure then
         local width = figure.width
         local height = figure.height
         if height > width then
             if height > maxdimen then
                 figure.height = maxdimen
                 figure.width  = width * maxdimen/height
             end
         elseif width > maxdimen then
             figure.width  = maxdimen
             figure.height = height * maxdimen/width
         end
         return figure
     end
end

so it's taken care of (in principle the img library is right in handling
...
maxdimen dimensions as lua has no such limit)
Hans

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