https://issues.apache.org/ooo/show_bug.cgi?id=125171

--- Comment #6 from Armin Le Grand <[email protected]> ---
The whole mechanism to have jpegs as lossless compression in the pdf export
works based on GfxLink. This is *not* about the graphic being defined using a
url or being linked as the name implies, but about the helper struct which is
used to buffer the graphic in a temp file or locally allocated buffer.
When doing pdf export in draw/impress/calc (aka DrawingLayer GraphicObject)
this is set and gets used. In Writer it's not set and not used, probably since
Writer is more intelligent in handling external graphic links and thus not
buffering them in temp files on the local machine. Due to that the original
jpeg is not available and cannot be used.
Central points are:
vclmetafileprocessor2d.cxx:756, pdfextoutdevdata.cxx:404, and (for reference,
no longer used) notxtfrm.cxx:828.
Checked again with AOO410, already there -> no regression.
To solve: Hard to say, somehow Writer should probably locally buffer linked
graphics...

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