[luatex] Override image resolution?

[Peter Rolf]

Hi Patrick,

Am 18.06.2016 um 12:13 schrieb Patrick Gundlach:
> Hi all,
> 
> some images (jpg) have a broken resolution field. Now when loading the image in LuaTeX (0.79), I get strange results for img.width and img.height, probably because of the resolution.
> 
> Is there a way to force a resolution (300x300 for example) when loading an image and ignore the setting in the file?
> 
> I know of img.xsize and img.ysize, so that is not a real problem, but I am just asking.
> 

I used \pdfimageresolution a few years ago. Should still be accessible
via \pdfvariable.

\pdfimageresolution 300

Best wishes,  Peter