Reveal.js export and code block output

Question

I'd like to use ATTR_REVEAL: :frag (roll-in) to display images in a reveal.js slideshow that are created using dot source blocks.

So far I've tried source block headings of:

#+BEGIN_SRC dot :file test.png :results show :exports results This shows the test.png in the slideshow, but doesn't roll it in

#+BEGIN_SRC dot :file test.png :results none :exports results This does not show test.png in the slideshow

#+BEGIN_SRC dot :file test.png :exports none This does not show test.png in the slideshow either.

Is what i'm trying to do here possible? If so, what heading parameters should I use to export to the reveal.js slideshow?

Here is the slideshow source if it helps you understand things:

#+REVEAL_THEME: sky
#+OPTIONS: toc:nil num:nil
#+TITLE: Cool title
#+AUTHOR: That guy

* Slide 1
#+ATTR_REVEAL: :frag (roll-in)
- List item 1
#+BEGIN_SRC dot :file test1.png :results show :exports results
digraph auth {
rankdir=LR;
node [shape=record];
1->2;
2->3;
3->1 [label="bleh!", fontcolor=red];
}
#+END_SRC

#+RESULTS: [[file:test1.png]]

- List item 2
#+BEGIN_SRC dot :file test2.png :results none :exports results
graph pres {
rankdir=LR;
node [shape=record];

1--2--3--4;
}
#+END_SRC

* Slide 2
* Slide 3

Answer 1

Figured out the solution. To get the #+RESULTS to roll-in during the exported presentation, I had to add additional #+ATTR_REVEAL :frag (roll-in) headings above each.

Corrected source:

#+REVEAL_THEME: sky
#+OPTIONS: toc:nil num:nil
#+TITLE: Cool title
#+AUTHOR: That guy

* Slide 1
#+ATTR_REVEAL: :frag (roll-in)
- List item 1

#+BEGIN_SRC dot :file test1.png
digraph auth {
rankdir=LR;
node [shape=record];
1->2;
2->3;
3->1 [label="bleh!", fontcolor=red];
}
#+END_SRC

#+ATTR_REVEAL: :frag (roll-in)
#+RESULTS: [[file:test1.png]]

#+ATTR_REVEAL: :frag (roll-in)
- List item 2

#+BEGIN_SRC dot :file test2.png
graph pres {
rankdir=LR;
node [shape=record];
1--2--3--4;
}
#+END_SRC

#+ATTR_REVEAL: :frag (roll-in)
#+RESULTS: file:test2.png

* Slide 2
* Slide 3

Hope this helps someone else too!