IRenderWindow class

IRenderWindow represents the native window created by operating system that supports rendering.

The IRenderWindow type exposes the following members:

Property	Description
size	Gets or sets the size of the render target.
viewports	Gets all viewports that associated with this render target.

Method	Description
`create_viewport(self, camera, background_color, rect)`	Create a viewport with specified background color and position/size in specified camera perspective.
`create_viewport(self, camera, rect)`	Create a viewport with position/size in specified camera perspective.
`create_viewport(self, camera)`	Create a viewport in specified camera perspective.