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
I shall append another, interesting MWE. There is a .png-image which is, as it
occasionally happens, represented as it should, by ConTeXt. And then the same
.png-image
to which I added a red frame by GIMP2.10. This one shows artefacts in ConTeXt!
I'm adding the .log-file too. There again is a luatex-warning, as I could
observe them
often in ConTeXt-LMTX:
--------------------------------------------------------------
luatex warning > pdfe: invalid 11 0 R object at offset 385741
--------------------------------------------------------------
Please, what does mean it? I fear there is something wrong with the
.png-handling
of ConTeXt/luatex.
The outputs of
feh image----red-frame.png
gm display image----red-frame.png
are looking ok. And GIMP2.10 has produced all image-files.
if you use luatex it will mention a mismatch between the resolutions in
the different kinds of metadata (93 vs 94 pixels)
Rudolf
PS.:
echo $PATH
/home/sam/Android/platform-tools:/bin:/usr/bin:/home/sam/context-lmtx/tex/texmf-linux-64/bin:/home/sam/context-lmtx/bin:/home/sam/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games
R.
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Hans Hagen | PRAGMA ADE
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