Read/Write same MTLTexture on iOS

Question

The texture2d access::read_write qualifier seems only available on OSX. Is there a way to read/write the same texture inside a kernel (or other) metal function?

The reason is the written texture values may not be final and can be updated by other threads.

Answer 1

Thanks for the hint @warrenm. It works using an atomic buffer

device atomic_uint *buf [[ buffer(0) ]]

performing following steps:

1. I initialize my atomic buffer in a separate kernel function that runs before the operation
2. The next kernel computes a min value for a specific coordinate using atomic_fetch_min_explicit(buf[pos], val, memory_order_relaxed)