fix(graphicsmagick): apply EXIF auto-orient so portrait images don't convert sideways (#590)

[thejdubb02]

Fixes #590.

A phone portrait photo is stored as landscape pixels plus an EXIF Orientation tag (for example Orientation 6, rotate 90). Converting it with the GraphicsMagick converter produced a landscape result, because gm convert was called without -auto-orient and the target format (PDF here) drops the orientation tag.

#577 fixed this for the ImageMagick converter by adding -auto-orient. This does the same for the GraphicsMagick converter, which is one of the paths the reporter mentions ("ImageMagick or others").

Reproduced with the exact command the converter runs, on a 600x400 JPEG tagged EXIF Orientation 6:

• gm convert in.jpg out.pdf produced a 600x400 (landscape) PDF page
• gm convert in.jpg -auto-orient out.pdf produced a 400x600 (portrait) PDF page

A genuinely portrait-pixel image (400x600, no EXIF) already converted to a portrait PDF, so this is specifically EXIF orientation, not page geometry. -auto-orient is a no-op on images with no orientation tag.

Test: mirrors the imagemagick test added in #577, asserting the gm convert args are ["convert", filePath, "-auto-orient", targetPath]. It fails without the change.

One note: like #577, this applies -auto-orient to every GraphicsMagick conversion. If you would rather scope it (some formats and targets can carry the orientation tag themselves, so they may not need it), I am happy to adjust.

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Summary by cubic

Fixes #590 by adding -auto-orient to the GraphicsMagick converter. Phone portrait photos (landscape pixels plus an EXIF orientation tag) previously converted to landscape when the target format dropped the tag; now they keep their orientation.

• Mirrors the ImageMagick converter fix from Apply EXIF orientation when converting images with ImageMagick #577.
• -auto-orient is a no-op on images without an orientation tag.

^{Written for commit 567c585. Summary will update on new commits.}

[cubic-dev-ai]

No issues found across 2 files

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