CUDA/OpenGL interop, draw to OpenGL texture with CUDA

Question

I am writing a rendering system in CUDA and want results to be quickly displayed via OpenGL, without touching main memory. I basically do the following:

Create and i

Answer 1

It seems interop requires to re-register textures upon resize. The following works:

void resize() {
    glViewport(0, 0, view.getWidth(), view.getHeight());

        // unregister
    cudaGraphicsUnregisterResource(viewCudaResource);
        // resize
    glBindTexture(GL_TEXTURE_2D, viewGLTexture);
    {
        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, view.getWidth(), view.getHeight(), 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
    }
    glBindTexture(GL_TEXTURE_2D, 0);
        // register back
    cudaGraphicsGLRegisterImage(&viewCudaResource, viewGLTexture, GL_TEXTURE_2D, cudaGraphicsRegisterFlagsWriteDiscard);
}