Hi

I am developing a game in eclipse using the android sdk and openGL.
I have come to the point were i need to mask a picture so only parts of it is visible. Searching through the web haven't helped me with what i need.

I've tried mixing with the different blendfunc and stencilbuffer but gotten nowhere.
The picture shows you what i want with the bottom plattform, the images to the right shows the mask and plattform.
If there is anyone out there that know how to get this effect using OpenGLes 1 please tell me.