Re: [NTG-context] "*.jpg is bugged", previously working

2 Sep 2021

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Am 01.09.2021 um 23:50 schrieb Hans Hagen via ntg-context :
On 9/1/2021 7:22 PM, Henning Hraban Ramm via ntg-context wrote:
...
Hi again,
was something changed WRT JPEG images?
Since a few versions some images that used to work are denied with the error message "... is bugged".
Maybe there *is* something wrong with them, but I don’t see a problem.
"file" gives:
JPEG image data, Exif standard: [TIFF image data, big-endian, direntries=12, height=3408, bps=0, PhotometricIntepretation=RGB, orientation=upper-left, width=2368], baseline, precision 8, 607x420, components 3
JPEG image data, JFIF standard 1.01, resolution (DPI), density 72x72, segment length 16, Exif Standard: [TIFF image data, big-endian, direntries=9, manufacturer=FLIR Systems AB, model=FLIR ONE Pro, orientation=upper-left, xresolution=152, yresolution=160, resolutionunit=2, software=Common_dll v1.0.0b1, datetime=2021:08:03 15:28:27], baseline, precision 8, 640x480, components 3
The latter is one of Harald’s infrared pictures.
I can send them off-list, if you like.
\starttext
   \externalfigure[20200910T115319.JPG][height=4cm]
   \externalfigure[old-paper-1140627-638x420.jpg][height=4cm]
\stoptext
both show up ok
(fwiw: the jpg code didn't really change since the first release of lmtx)
It’s a problem with grph-downsample.lua (or maybe GM), I must research further...

\loadluafile[grph-downsample]

\setupexternalfigures[
  conversion=lowres.jpg,
	resolution=72,
]

\starttext
  \externalfigure[20200910T115319][height=4cm]
  \externalfigure[old-paper-1140627-638x420][height=4cm]
\stoptext

Hraban