On 19 Mar 2012, at 13:34, Edzard Egberts wrote:
> This is a FAQ, but I missed to keep track of this.
>
> I need to save a plotted graph as a picture, e.g. png, bmp, jpg. I
> think, I should use Fl_Offscreen and something like
> Fl_Offscreen::Save_Png() is what I need.
Yes - we don't have that...
What I did was just read back the data from the offscreen, repack it as RGB,
then write it to a PNG using the stock PNG API directly.
Getting the data out was done as per this howto:
http://www.fltk.org/articles.php?L468
And writing the PNG is just as per the notes in the PNG docs anyway.
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