Re: error when using externalfigure

[Hans Hagen <pragma@wxs.nl>]

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 <pavel.dohnal@twobits.cz>
>>> 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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