[NTG-context] (forw) Re: Strange behavior concerning pdf-output of externalfigures

Taco Hoekwater taco at elvenkind.com
Tue May 21 10:35:10 CEST 2019


Just for fun, I ran the test myself. I do not have gm installed, so the inclusion of the tiff failed, and (perhaps not coincidentally) I have no artifacts in the png image in my output either.

Best wishes,

> On 21 May 2019, at 09:52, Hans Hagen <j.hagen at xs4all.nl> wrote:
> On 5/17/2019 9:43 AM, Rudolf Bahr wrote:
>> On Thu, May 16, 2019 at 02:40:07PM +0200, Hans Hagen wrote:
>>> On 5/16/2019 12:21 PM, Rudolf Bahr wrote:
>>>> The problem with artefacts in .png images is still unsolved for me.
>>>> I can circumvent it by using .jpg or .tiff images instead of .png images
>>>> as long as no transparent areas in the images are needed. As far as I know
>>>> .jpg and .tiff formats cannot handle transparancy, do they?
>>>> Now in .log files messages like
>>>> "luatex warning  > pdfe: invalid 11 0 R object at offset 223611"
>>>> can be seen. Please, what do they mean?
>>> Does that come from an pdf generated by image magick>? If so, the problem is
>>> there ... the last years I've seen lots of converted files with bogus pdf
>>> objects. (Kind of harmless but still.)
>>> Hans
>> No. I never use neither ImageMagick nor GraphicsMagick to generate images in
>> .pdf-format. Even with my scanner software I produce always .jpg-images though it
>> is capable to produce .pdf-output too. The only .pdf-files I'm doing are made by
>> ConTeXt-LMTX!
> ah, but you ask for an tiff image .. there is no native tiff support so that one gets converted to pdf beforehand ... you can see an m_k_i_v_* image in your path ... as gm is called that is the reason why you get the bad object: it really is in that pdf file

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