Opengl Z buffer to cuda

Accelerated Computing CUDA CUDA Programming and Performance
1

Does anyone have an idea of how to transfer and openGl FramebufferObject to cuda ?

Everything I found so far is marked as deprectated on my version of cude (6.5)

2

Here is a link to the non deprecated Graphics Interoperability for OpenGL in the current
release of the CUDA SDK.

[url]http://docs.nvidia.com/cuda/cuda-c-programming-guide/#opengl-interoperability[/url]

If this includes access to the depth buffer, I don’t really know.

3

Thanks for your reply,

I will read this guide and give a feedback of my progression.

4 
void make_Fbo()
{
	glGenFramebuffers(1, &fbo);
	glBindFramebuffer(GL_FRAMEBUFFER, fbo);
	glFramebufferRenderbuffer(GL_FRAMEBUFFER,
							  GL_DEPTH_ATTACHMENT,
							  GL_RENDERBUFFER,
	                          rb);
	check_gl_error("make_fbo");


}

void make_render_buffer()
{
	glGenRenderbuffers(1, &rb);
	glBindRenderbuffer(GL_RENDERBUFFER, rb);
	glRenderbufferStorage(GL_RENDERBUFFER,
						  GL_DEPTH_COMPONENT,
	                           win.width,
	                           win.height);
	check_gl_error("make render_buffer");
}

cudaGraphicsResource *make_cuda_context()
{
	struct cudaGraphicsResource *cu_fbo;
    cuda_error("set device", cudaGLSetGLDevice(get_device()));
	cuda_error("registerbuffer",cudaGraphicsGLRegisterBuffer(&cu_fbo,
	                                 fbo,
	                                 cudaGraphicsRegisterFlagsReadOnly));

	return cu_fbo;

}

Up here are the 3 functions I’m using.

I first make the render buffer then the frame buffer object and finally bind it with the function make_cuda_context.

cudaGraphicsGLRegisterBuffer() return me “invalid resource handle” error.

Anyone have an idea why ?

5

Anyone got some help or any idea ?