Draft: vulkan: Avoid blocking waits on the gpu on blit
This allows the blit-filter to run in synchronous or asynchronous mode. In asynchronous mode the blocking wait on the gpu is replaced by registering a fd from vulkan with the event loop.
This allows the blit-filter to run in synchronous or asynchronous mode. In asynchronous mode the blocking wait on the gpu is replaced by registering a fd from vulkan with the event loop.