Cuda/OpenGL FBO/PBO and write to screen

Hi all,

I have an openGL app that generate in a FBO ( as GL_RGBA32F,GL_TEXTURE_2D_ARRAY) position and normal for defered use.

I need to make this FBO readable from cuda to do some shade computation:

glm::vec4  *myFBO;
cudaGraphicsGLRegisterBuffer(   &FBO, 			adrFBO,     	cudaGraphicsMapFlagsReadOnly);
cudaGraphicsResourceGetMappedPointer((void**)&myFBO,	&FBOSize,		FBO);	

///run kernel
cudaGraphicsUnmapResources(1, &FBO, 		0);

Is this the good way to read in my FBO from Cuda?

How can i write the result of my kernel dirctly to screen?