;;; image.el --- image API
-;; Copyright (C) 1998-2012 Free Software Foundation, Inc.
+;; Copyright (C) 1998-2012 Free Software Foundation, Inc.
;; Maintainer: FSF
;; Keywords: multimedia
dir (expand-file-name "../" dir))))
(setq image-directory-load-path dir))
- ;; If `image-directory-load-path' isn't Emacs' image directory,
+ ;; If `image-directory-load-path' isn't Emacs's image directory,
;; it's probably a user preference, so use it. Then use a
;; relative setting if possible; otherwise, use
;; `image-directory-load-path'.
;; Set it to nil if image is not found.
(cond ((file-exists-p (expand-file-name image d2ei)) d2ei)
((file-exists-p (expand-file-name image d1ei)) d1ei)))))
- ;; Use Emacs' image directory.
+ ;; Use Emacs's image directory.
(image-directory-load-path
(setq image-directory image-directory-load-path))
(no-error
(delete image-directory (copy-sequence (or path load-path))))))
+;; Used to be in image-type-header-regexps, but now not used anywhere
+;; (since 2009-08-28).
(defun image-jpeg-p (data)
"Value is non-nil if DATA, a string, consists of JFIF image data.
We accept the tag Exif because that is the same format."
type)
+(if (fboundp 'image-metadata) ; eg not --without-x
+ (define-obsolete-function-alias 'image-extension-data
+ 'image-metadata' "24.1"))
+
(define-obsolete-variable-alias
'image-library-alist
'dynamic-library-alist "24.1")
"List of supported animated image types.")
(defun image-animated-p (image)
- "Return non-nil if image can be animated.
-Actually, the return value is a cons (NIMAGES . DELAY), where
-NIMAGES is the number of sub-images in the animated image and
-DELAY is the delay in second until the next sub-image shall be
-displayed."
+ "Return non-nil if IMAGE can be animated.
+To be capable of being animated, an image must be of a type
+listed in `image-animated-types', and contain more than one
+sub-image, with a specified animation delay. The actual return
+value is a cons (NIMAGES . DELAY), where NIMAGES is the number
+of sub-images in the animated image and DELAY is the delay in
+seconds until the next sub-image should be displayed."
(cond
- ((eq (plist-get (cdr image) :type) 'gif)
+ ((memq (plist-get (cdr image) :type) image-animated-types)
(let* ((metadata (image-metadata image))
(images (plist-get metadata 'count))
(delay (plist-get metadata 'delay)))
(if (< delay 0) (setq delay 0.1))
(cons images delay))))))
+;; "Destructively"?
(defun image-animate (image &optional index limit)
"Start animating IMAGE.
Animation occurs by destructively altering the IMAGE spec list.
(setq timer nil)))
timer))
+;; FIXME? The delay may not be the same for different sub-images,
+;; hence we need to call image-animated-p to return it.
+;; But it also returns count, so why do we bother passing that as an
+;; argument?
(defun image-animate-timeout (image n count time-elapsed limit)
"Display animation frame N of IMAGE.
N=0 refers to the initial animation frame.
COUNT is the total number of frames in the animation.
-DELAY is the time between animation frames, in seconds.
TIME-ELAPSED is the total time that has elapsed since
`image-animate-start' was called.
LIMIT determines when to stop. If t, loop forever. If nil, stop
after displaying the last animation frame. Otherwise, stop
- after LIMIT seconds have elapsed."
+ after LIMIT seconds have elapsed.
+The minimum delay between successive frames is 0.01s."
(plist-put (cdr image) :index n)
(force-window-update)
(setq n (1+ n))
\f
(defcustom imagemagick-types-inhibit
'(C HTML HTM TXT PDF)
- "ImageMagick types that Emacs should not use ImageMagick to handle.
-This should be a list of symbols, each of which has the same
-names as one of the format tags used internally by ImageMagick;
-see `imagemagick-types'. Entries in this list are excluded from
-being registered by `imagemagick-register-types'.
+ "ImageMagick types that should not be visited in Image mode.
+This should be a list of symbols, each of which should be one of
+the ImageMagick types listed in `imagemagick-types'. These image
+types are not registered by `imagemagick-register-types'.
-If Emacs is compiled without ImageMagick, this variable has no effect."
+If Emacs is compiled without ImageMagick support, this variable
+has no effect."
:type '(choice (const :tag "Let ImageMagick handle all types it can" nil)
(repeat symbol))
+ ;; Ideally, would have a :set function that checks if we already did
+ ;; imagemagick-register-types, and if so undoes it, then redoes it.
:version "24.1"
:group 'image)
;;;###autoload
(defun imagemagick-register-types ()
"Register file types that can be handled by ImageMagick.
-This adds the file types returned by `imagemagick-types'
-\(excluding the ones in `imagemagick-types-inhibit') to
-`auto-mode-alist' and `image-type-file-name-regexps', so that
-Emacs visits them in Image mode.
+This registers the ImageMagick types listed in `imagemagick-types',
+excluding those listed in `imagemagick-types-inhibit'.
+
+Registered image types are added to `auto-mode-alist', so that
+Emacs visits them in Image mode. They are also added to
+`image-type-file-name-regexps', so that the `image-type' function
+recognizes these files as having image type `imagemagick'.
If Emacs is compiled without ImageMagick support, do nothing."
(when (fboundp 'imagemagick-types)
HCoop / bpt / emacs.git / blobdiff