public GLFBORenderTexture( GLFBORTTManager manager, string name, GLSurfaceDesc target, bool writeGamma, int fsaa )
: base( name, target, writeGamma, fsaa )
{
_fbo = new GLFrameBufferObject( manager );
// Bind target to surface 0 and initialise
_fbo.BindSurface( 0, target );
// Get attributes
width = _fbo.Width;
height = _fbo.Height;
}