When I toggle inline images I can see the image. But I want to rotate it. There is an option to specify a custom width using:
#+ATTR_ORG: :width 80
Is there a similar option to rotate the image?
Update (as of 24 July 2022):
After applying the patch provided in the answer the following works:
#+ATTR_ORG: :width 80 :rotation 90
Rotation values are in degrees and only work if its a multiple of 90 i.e. 90, 180 and 270 are valid. Any other values wont affect the rotation.
You can copy and paste the following to your init.el to have the rotation feature.
(with-eval-after-load 'org
;; Function redefinition
(defun org-display-inline-images (&optional include-linked refresh beg end)
"Display inline images.
An inline image is a link which follows either of these
conventions:
1. Its path is a file with an extension matching return value
from `image-file-name-regexp' and it has no contents.
2. Its description consists in a single link of the previous
type. In this case, that link must be a well-formed plain
or angle link, i.e., it must have an explicit \"file\" type.
Equip each image with the key-map `image-map'.
When optional argument INCLUDE-LINKED is non-nil, also links with
a text description part will be inlined. This can be nice for
a quick look at those images, but it does not reflect what
exported files will look like.
When optional argument REFRESH is non-nil, refresh existing
images between BEG and END. This will create new image displays
only if necessary.
BEG and END define the considered part. They default to the
buffer boundaries with possible narrowing."
(interactive "P")
(when (display-graphic-p)
(unless refresh
(org-remove-inline-images)
(when (fboundp 'clear-image-cache) (clear-image-cache)))
(let ((end (or end (point-max))))
(org-with-point-at (or beg (point-min))
(let* ((case-fold-search t)
(file-extension-re (image-file-name-regexp))
(link-abbrevs (mapcar #'car
(append org-link-abbrev-alist-local
org-link-abbrev-alist)))
;; Check absolute, relative file names and explicit
;; "file:" links. Also check link abbreviations since
;; some might expand to "file" links.
(file-types-re
(format "\\[\\[\\(?:file%s:\\|attachment:\\|[./~]\\)\\|\\]\\[\\(<?file:\\)"
(if (not link-abbrevs) ""
(concat "\\|" (regexp-opt link-abbrevs))))))
(while (re-search-forward file-types-re end t)
(let* ((link (org-element-lineage
(save-match-data (org-element-context))
'(link) t))
(linktype (org-element-property :type link))
(inner-start (match-beginning 1))
(path
(cond
;; No link at point; no inline image.
((not link) nil)
;; File link without a description. Also handle
;; INCLUDE-LINKED here since it should have
;; precedence over the next case. I.e., if link
;; contains filenames in both the path and the
;; description, prioritize the path only when
;; INCLUDE-LINKED is non-nil.
((or (not (org-element-property :contents-begin link))
include-linked)
(and (or (equal "file" linktype)
(equal "attachment" linktype))
(org-element-property :path link)))
;; Link with a description. Check if description
;; is a filename. Even if Org doesn't have syntax
;; for those -- clickable image -- constructs, fake
;; them, as in `org-export-insert-image-links'.
((not inner-start) nil)
(t
(org-with-point-at inner-start
(and (looking-at
(if (char-equal ?< (char-after inner-start))
org-link-angle-re
org-link-plain-re))
;; File name must fill the whole
;; description.
(= (org-element-property :contents-end link)
(match-end 0))
(match-string 2)))))))
(when (and path (string-match-p file-extension-re path))
(let ((file (if (equal "attachment" linktype)
(progn
(require 'org-attach)
(ignore-errors (org-attach-expand path)))
(expand-file-name path))))
(when (and file (file-exists-p file))
(let ((width (org-display-inline-image--width link))
(rotation (org-display-inline-image--rotation link))
(old (get-char-property-and-overlay
(org-element-property :begin link)
'org-image-overlay)))
(if (and (car-safe old) refresh)
(image-refresh (overlay-get (cdr old) 'display))
(let ((image (org--create-inline-image file width rotation)))
(when image
(let ((ov (make-overlay
(org-element-property :begin link)
(progn
(goto-char
(org-element-property :end link))
(skip-chars-backward " \t")
(point)))))
(overlay-put ov 'display image)
(overlay-put ov 'face 'default)
(overlay-put ov 'org-image-overlay t)
(overlay-put
ov 'modification-hooks
(list 'org-display-inline-remove-overlay))
(when (boundp 'image-map)
(overlay-put ov 'keymap image-map))
(push ov org-inline-image-overlays))))))))))))))))
;; Function redefinition
(defun org--create-inline-image (file width rotation)
"Create image located at FILE, or return nil.
WIDTH is the width of the image. The image may not be created
according to the value of `org-display-remote-inline-images'."
(let* ((remote? (file-remote-p file))
(file-or-data
(pcase org-display-remote-inline-images
((guard (not remote?)) file)
(`download (with-temp-buffer
(set-buffer-multibyte nil)
(insert-file-contents-literally file)
(buffer-string)))
(`cache (let ((revert-without-query '(".")))
(with-current-buffer (find-file-noselect file)
(buffer-string))))
(`skip nil)
(other
(message "Invalid value of `org-display-remote-inline-images': %S"
other)
nil))))
(when file-or-data
(create-image file-or-data
(and (image-type-available-p 'imagemagick)
width
'imagemagick)
remote?
:width width
:rotation rotation))))
;; New function
(defun org-display-inline-image--rotation (link)
"Determine the display rotation of the image LINK, in degrees."
;; Apply `org-image-actual-width' specifications.
(let* ((case-fold-search t)
(par (org-element-lineage link '(paragraph)))
(attr-re "^[ \t]*#\\+attr_.*?: +.*?:rotation +\\(\\S-+\\)")
(par-end (org-element-property :post-affiliated par))
;; Try to find an attribute providing a :rot.
(attr-rot
(when (and par (org-with-point-at
(org-element-property :begin par)
(re-search-forward attr-re par-end t)))
(match-string 1))))
(when attr-rot (string-to-number attr-rot)))))
converttool, so that Org mode (or anybody else using it) does not need to rotate it