Book Image

Vulkan Cookbook

By : Lapinski
Book Image

Vulkan Cookbook

By: Lapinski

Overview of this book

Vulkan is the next generation graphics API released by the Khronos group. It is expected to be the successor to OpenGL and OpenGL ES, which it shares some similarities with such as its cross-platform capabilities, programmed pipeline stages, or nomenclature. Vulkan is a low-level API that gives developers much more control over the hardware, but also adds new responsibilities such as explicit memory and resources management. With it, though, Vulkan is expected to be much faster. This book is your guide to understanding Vulkan through a series of recipes. We start off by teaching you how to create instances in Vulkan and choose the device on which operations will be performed. You will then explore more complex topics such as command buffers, resources and memory management, pipelines, GLSL shaders, render passes, and more. Gradually, the book moves on to teach you advanced rendering techniques, how to draw 3D scenes, and how to improve the performance of your applications. By the end of the book, you will be familiar with the latest advanced techniques implemented with the Vulkan API, which can be used on a wide range of platforms.
Table of Contents (13 chapters)

Destroying a semaphore

Semaphores can be reused multiple times, so usually we don't need to delete them when the application is executing. But when we don't need a semaphore any more, and if we are sure it is not being used by the device (there are both no pending waits, and no pending signal operations), we can destroy it.

How to do it...

  1. Take the handle of a logical device. Store this handle in a variable of type VkDevice named logical_device.
  2. Initialize a variable of type VkSemaphore named semaphore with a handle of the semaphore that should be destroyed. Make sure it is not referenced by any submissions.
  3. Make the following call: vkDestroySemaphore( logical_device, semaphore, nullptr ), for which provide the logical device's handle, the handle...