How to read back a CUDA Texture for testing?

Question

Ok, so far, I can create an array on the host computer (of type float), and copy it to the gpu, then bring it back to the host as another array (to test if the copy was succ

Answer 1

readTexels() is a kernel (__global__) function, i.e. it runs on the GPU. Therefore you need to use the correct syntax to launch a kernel.

Take a look through the CUDA Programming Guide and some of the SDK samples, both available via the NVIDIA CUDA site to see how to launch a kernel.

Hint: It'll end up something like readTexels<<>>(...)