CUDA Texture Linear Filtering

Question

In the CUDA C Programming Guide Version 5, Appendix E.2 (Linear Filtering), it is stated that:

In this filtering mode, which is only available

Answer 1

It means that linear filtering is available only when the "read mode" of the texture is cudaReadModeNormalizedFloat, i.e. integer types (such as u8) get promoted to floating point values in the range [0.0, 1.0] (for unsigned integers) or [-1.0, 1.0] (for signed integers).