extension function on plugin

[Terry Chang]

Hi we are developing this web app: http://projects.igre.emich.edu/iccarsp/

Now we are trying to do the following:

1.upload an image on the viewer

2.adjust the image (,move, rotate etc) to its accurate location

3.measure the area of the image area(or maybe digitizing it to measure the frame of the image)

4.output the result (the background and the uploaded image) as kml

i did research it  seems that we can do all of this in desktop version, so we are trying to do the same thing on web plugin

but google did not publish the code for these fucntions(correct?) 

So i am wondering if there is any other way to do the functions.

any advice will help thanks!