How to send textures native ptr from web player to NPAPI browser plugin?

I have written an NPAPI plugin (using Firebreath) to access MS Kinect camera. I can retreive skeleton data from the plugin through JavaScript easily since it isn't too big, but the problem is with color and depth data (images).

I would like to know if it's possible to send a native texture pointer from Unity through JavaScript to my C++ plugin so that i can write the data to the texture directly (tested in the standalone version and it works)

If there are other suggestions on how to send image data from the browser plugin to Unity web player efficiently I'll be happy to read them.

Thanks