Book Image

Vulkan Cookbook

By : Pawel Lapinski
Book Image

Vulkan Cookbook

By: Pawel 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)

Freeing descriptor sets

If we want to return memory allocated by a descriptor set and give it back to the pool, we can free a given descriptor set.

How to do it...

  1. Use the handle of a logical device to initialize a variable of type VkDevice named logical_device.
  2. Take the descriptor pool that was created with a VK_DESCRIPTOR_POOL_CREATE_FREE_DESCRIPTOR_SET_BIT flag. Store its handle in a variable of type VkDescriptorPool named descriptor_pool.
  3. Create a vector of type std::vector<VkDescriptorSet> named descriptor_sets. Add all the descriptor sets that should be freed to the vector.
  4. Call vkFreeDescriptorSets( logical_device, descriptor_pool, static_cast<uint32_t>(descriptor_sets.size()), descriptor_sets.data() ). For the call provide the logical_device...