export image due canvas2png / FlashCanvasPro

```
What steps will reproduce the problem?
1. missing docu on how to export image due canvas2png
2.
3.

What is the expected output? What do you see instead?
nothing, dont know how to use the code correctly

What version of the product are you using? On what operating system?
win7/firefox

Please provide any additional information below.
i would like to use the "canvas2png" function and library found in
...jsc3d\external\FlashCanvasPro\bin but i can not find any informations how to
use it correctly. i tried simply toDataURL already
(window.open(cv.toDataURL());) apart from that plugin but i always just get a
blank image instead of the final rendered. any suggestions?

any help highly appriciated (:
thanks!

```

Original issue reported on code.google.com by `janus1...@gmail.com` on 16 Mar 2014 at 12:30

Read the usage of `canvas2png` in `...jsc3d\external\FlashCanvasPro\bin` and compare it with the reported `cv.toDataURL()` attempt. Done means adding documentation that explains the correct export steps and produces a nonblank final-render image on the reported setup.

Written by the indexing model from the issue text.