From mboxrd@z Thu Jan  1 00:00:00 1970
From: Grant Rettke <gcr@wisdomandwonder.com>
Subject: Re: Base 64 inline images in html export
Date: Tue, 22 Dec 2015 19:48:00 -0600
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References: <cieptky4d6lait.fsf@amazon.co.uk>
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To: Greg Sexton <gsexton@amazon.co.uk>
Cc: "emacs-orgmode@gnu.org" <emacs-orgmode@gnu.org>

Since you too are exploring packaging, this might give you some test:

http://kitchingroup.cheme.cmu.edu/blog/2014/03/05/Creating-a-transportable-zip-archive-of-an-org-file/
Sincerely,

Grant Rettke


On Mon, Dec 7, 2015 at 6:15 AM, Greg Sexton <gsexton@amazon.co.uk> wrote:
> Hi,
>
> I did find a post about this from around 2009 but I'm not sure it went
> anywhere. It's very useful for me to be able to export a single html
> file that I can distribute around. Base 64 encoding images directly in
> to the exported html makes this possible.
>
> The feature seems fairly well supported by browsers these days.[1]
>
> I've hacked up this ugly proof of concept. I guess it wouldn't take too
> much to productionize this and make the behavior configurable. Any
> thoughts?
>
> --8<---------------cut here---------------start------------->8---
> (defun gs/b64-img (file-uri)
>   (let ((file (s-replace "file://" "" file-uri)))
>     (if (f-exists? file)
>         ;; src="data:image/png;base64,iVBORw0KGgoAAAANSUh..."
>         (s-concat "data:image/"
>                   (f-ext file)
>                   ";base64,"
>                   (base64-encode-string (f-read-bytes file)))
>       file-uri)))
>
> (defun org-html--format-image (source attributes info)
>   "Return \"img\" tag with given SOURCE and ATTRIBUTES.
> SOURCE is a string specifying the location of the image.
> ATTRIBUTES is a plist, as returned by
> `org-export-read-attribute'.  INFO is a plist used as
> a communication channel."
>   (org-html-close-tag
>    "img"
>    (org-html--make-attribute-string
>     (org-combine-plists
>      (list :src (gs/b64-img source)   ; <-- interesting line is here
>            :alt (if (string-match-p "^ltxpng/" source)
>                     (org-html-encode-plain-text
>                      (org-find-text-property-in-string 'org-latex-src source))
>                   (file-name-nondirectory source)))
>      attributes))
>    info))
> --8<---------------cut here---------------end--------------->8---
>
>
> [1]: http://stackoverflow.com/questions/1207190/embedding-base64-images
>
> --
>  Greg
>
>
>
> Amazon Development Centre (London) Ltd. Registered in England and Wales with registration number 04543232 and which has its registered office at Leadenhall Court, One Leadenhall Street, London EC3V 1PP, United Kingdom.
>
>