'There is no such method so far. You can raise a feature request in our trackers so it will be recognized by the dev team and maybe added.
New day, fresh thoughts. I can just add openGL to IrrRocketRenderer and call very same Opengl functions like in SFML Rocket renderer without having to change ...
The error is in SetScissorRegion() and EnableScissorRegion() functions. I modified my OpenGL Irrlicht Driver like said on previous page and now it works flawlessly. http://i50.tinypic.com/2zemsno.png though it would be better to not having to modify Irrlicht files and just fix those functions ...
Then try to build Irrlicht from source in C::B. You should get \bin\Win32-gcc\Irrlicht.dll and \lib\Win32-gcc\libIrrlicht.dll.a (or libIrrlicht.a). Use them in your project, they must work proper. Try it, you wont lose anything
https://bitbucket.org/suddani/irrlibrocket/overview I've found a bug in Irrlicht Rocket Renderer. If you place element with "overflow: auto" or "overflow: scroll" and input with type = "text" or "password" then you will get something like this: http://i49.tinypic.com/axe1eb.jpg (notice the text ...