A semaphore that is signaled when the image is ready to be written to. Use it to synchronize with the first submission that will write to the image.
The maximum time to wait until the call returns. Use negative timeout to specify infinite waiting time. Use null timeout to specify no wait at all.
ImageAcquisition representing the result of the operation.
ImageAcquisition
Acquire the next image in the swapchain. This function may block until the next image is available.