loader: Override layer support and settings

Add support for an override layer in the loader. This allows layers
to be set by an outside application.

Revamp the logic to detect manifest files in the various paths that
we allow them to be placed. This code significantly rewrites

Change-Id: I8abf558864b66eb71ee026ca559b0126cf2fa4e9
4 files changed
tree: ff4a5bdac5fe8fb5f6300af06ba8405eca8d8b6a
  1. .appveyor.yml
  2. .clang-format
  3. .cmake-format.py
  4. .gitattributes
  5. .gitignore
  6. .travis.yml
  7. BUILD.md
  8. CMakeLists.txt
  10. COPYRIGHT.txt
  12. LICENSE.txt
  13. README.md
  14. cmake/
  15. external/
  16. loader/
  17. scripts/
  18. tests/

Vulkan Ecosystem Components

This project provides the Khronos official Vulkan ICD desktop loader for Windows, Linux, and MacOS.

CI Build Status

PlatformBuild Status
Linux/MacOSBuild Status
WindowsBuild status


Vulkan is an explicit API, enabling direct control over how GPUs actually work. As such, Vulkan supports systems that have multiple GPUs, each running with a different driver, or ICD (Installable Client Driver). Vulkan also supports multiple global contexts (instances, in Vulkan terminology). The ICD loader is a library that is placed between a Vulkan application and any number of Vulkan drivers, in order to support multiple drivers and the instance-level functionality that works across these drivers. Additionally, the loader manages inserting Vulkan layer libraries, such as validation layers, between an application and the drivers.

This repository contains the Vulkan loader that is used for Linux, Windows, MacOS, and iOS. There is also a separate loader, maintained by Google, which is used on Android.

The following components are available in this repository:

Contact Information

Information for Developing or Contributing

Please see the CONTRIBUTING.md file in this repository for more details. Please see the GOVERNANCE.md file in this repository for repository management details.

How to Build and Run

BUILD.md Includes directions for building all components.

Architecture and interface information for the loader is in loader/LoaderAndLayerInterface.md.


This work is released as open source under a Apache-style license from Khronos including a Khronos copyright.

See COPYRIGHT.txt for a full list of licenses used in this repository.


While this project has been developed primarily by LunarG, Inc., there are many other companies and individuals making this possible: Valve Corporation, funding project development; Khronos providing oversight and hosting of the project.