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Vulkan Cookbook

You're reading from   Vulkan Cookbook Work through recipes to unlock the full potential of the next generation graphics API—Vulkan

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Product type Paperback
Published in Apr 2017
Publisher Packt
ISBN-13 9781786468154
Length 700 pages
Edition 1st Edition
Languages
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Author (1):
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Pawel Lapinski Pawel Lapinski
Author Profile Icon Pawel Lapinski
Pawel Lapinski
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Toc

Table of Contents (13) Chapters Close

Preface 1. Instance and Devices FREE CHAPTER 2. Image Presentation 3. Command Buffers and Synchronization 4. Resources and Memory 5. Descriptor Sets 6. Render Passes and Framebuffers 7. Shaders 8. Graphics and Compute Pipelines 9. Command Recording and Drawing 10. Helper Recipes 11. Lighting 12. Advanced Rendering Techniques

Using push constants in shaders

When we provide data to shaders, we usually use uniform buffers, storage buffers, or other types of descriptor resources. Unfortunately, updating such resources may not be too convenient, especially when we need to provide data that changes frequently.

For this purpose, push constants were introduced. Through them we can provide data in a simplified and much faster way than by updating descriptor resources. However, we need to fit into a much smaller amount of available space.

Accessing push constants in GLSL shaders is similar to using uniform buffers.

How to do it...

  1. Create a shader file.
  2. Define a uniform block:
    1. Provide a push_constant layout qualifier:
      layout( push_constant )
    2. Use a uniform storage qualifier
    1. Provide a unique...
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