[6.x] Swap image dimensions when EXIF orientation indicates a 90° rotation#14685
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Orientations 5–8 all involve a 90° rotation, so the stored pixel dimensions are transposed relative to how the image is actually displayed. Mirrors the existing behaviour for rotated videos. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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getimagesize()returns raw file dimensions without accounting for EXIF orientation. For photos taken in portrait mode on phones (e.g. iPhone), the pixel data is stored in landscape orientation with an EXIF orientation tag (typically 5–8) indicating the image should be rotated 90° when displayed. This caused reported dimensions and aspect ratios to be wrong.Orientations 5–8 all involve a 90° rotation, so we now swap width and height for those cases — the same logic already applied to rotated videos.
Fixes #14681
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