On Sun, 29 Aug 2010 06:13:54 -0700 (PDT)
"Edward K. Ream" <[email protected]> wrote:

> > 2. Use Wink to add callouts and other visual features to slides.  This
> > is likely going to be fairly tedious, but I see no other way.  
> 
> Hmm.  Some kind of scripting might remove some of the tedium.  It
> depends on what arguments can be passed to Wink.  Sikuli could do
> this, but imo it is not very attractive.

Using Inkscape, i.e. SVG, to add callouts would be more FLOSSy than using 
Flash, and a reasonably high level of automation should be possible:

  callouts = [
     "This goes here",
     "These are those",
     "Then you pull this",
  ]

  make_svg("gnx.2309525.blah.png", callouts, numbers=[1,2])

to make an SVG with a screen shot, three filled-in text style callouts and two 
white number on black circle style markers.  make_svg() or another function 
could then load the SVG in Inkscape for the pointers from the callouts etc. to 
be positioned as needed.

Cheers -Terry

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