Image orientation not respected when exporting to PDF

[TylerJMcLean]

Describe the Bug

Similar to #1854 I believe that the orientation data for the image is not being respected when exporting to PDF. Since the fix was applied, my images show up in the correct orientation on Bookstack itself. But when I export, it reverts to the previous behaviour of ignoring the rotation

In bookstack

Export to PDF

Steps to Reproduce

1. Create a document with an image in Bookstack
2. Save the document
3. Export to PDF
4. Open PDF

Expected Behaviour

Image should have the same orientation as shown on the site

Screenshots or Additional Context

No response

Browser Details

No response

Exact BookStack Version

v23.12.3

[ssddanbrown]

Thanks for reporting @TylerJMcLean,
Will be related to the upstream issue here: dompdf/dompdf#2456

As a workaround, if needed, you could rotate the image via an image editing app (GIMP, Photopea etc...) so that the image itself is fully orientated (Rather than orientated via EXIF metadata).

[TylerJMcLean]

Thanks @ssddanbrown for the quick response. I will do that until this is fixed.

As a side thought, it's pretty weird that some phones save it that way even when taken in portrait orientation.

• Tyler

[abdulmannans]

Is there any solution to this?

[virtadpt]

@TylerJMcLean Here's the weird thing: This happens even when the phone that took the picture doesn't put an EXIF tag that causes the image to be rotated. I've got a Samsung Galaxy S23 which doesn't do that (I checked with exiftools), but whenever I take a picture with my phone and add it to a wiki page it's always rotated. Most of the time it's only slightly amusing, but I'm uploading photographs of recipes I'm archiving and it's a huge pain in the butt when it comes to transcribing the text.

[ssddanbrown]

Just to throw out some other options to work around this:

• Export via the browser's print to PDF feature.
• You could set a command to use an alternative renderer which may have better support for image orientations.

[ssddanbrown]

If you've been seeing rotated images outside of just PDF exports (in gallery and in content) then this may have been due to some changes in v24.05 which have been addressed in #5462.