Method Rotate

internal/attachments/processor.go:48–48

Rotate returns a new image rotated by deg degrees clockwise. Only multiples of 90 (90, 180, 270, plus their negatives) are supported in Phase 1 — that's what the editor's rotation tool (TASK-879) emits, and it sidesteps the resampling cost of arbitrary-angle rotation.

(img image.Image, deg int)

	// (TASK-879) emits, and it sidesteps the resampling cost of
	// arbitrary-angle rotation.
	Rotate(img image.Image, deg int) (image.Image, error)

	// Crop returns the rectangular sub-image bounded by `rect`. The
	// rectangle is interpreted in the image's coordinate space (origin