I am currently developing a little package, tumme.el, to browse images
in Emacs. It is similar to thumbs.el but quite different too.
I have code that inserts thumbnail versions of images into a buffer,
like this:
(defun tumme-ins-img (file original-file-name
associated-dired-buffer)
"Insert thumbnail image."
(let (beg end tags
(i `(image :type ,'jpeg
:file ,file
:relief ,tumme-thumb-relief
:margin ,tumme-thumb-margin)))
(setq beg (point))
(insert-image i)
(setq end (point))
(add-text-properties
beg end
(list 'original-file-name original-file-name
'associated-dired-buffer associated-dired-buffer
'tags (tumme-list-tags original-file-name)))))
The problem is that if I rotate the thumbnail image (using the tools
from ImageMagick), removes and inserts the image again, the image is
fetched from Emacs' image cache. Therefor I need to clear the cache
using `clear-image-cache' so that it loads the file from disk.
Now, I know that this can be done in other ways. For example
`insert-image-file' does not have this problem as it puts the image
bytes into the text properties, while they way I use `insert-image'
will insert the file name. I probably can change the code to work the
way `insert-image-file' does, but I would rather like to, in some way,
be able to flush one particular image from the image cache.
Can this be done or do I need to write a more advanced piece of code?
For now I will use `clear-image-cache' although it feels "ugly".
/Mathias
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