This guide is intended to fill the gaps between the official Vulkan resources and the rest of the GLFW documentation and is not a replacement for either. It assumes some familiarity with Vulkan concepts like loaders, devices, queues and surfaces and leaves it to the Vulkan documentation to explain the details of Vulkan functions.
To develop for Vulkan you should download the LunarG Vulkan SDK for your platform. Apart from headers and link libraries, they also provide the validation layers necessary for development.
For details on a specific Vulkan support function, see the Vulkan support reference. There are also guides for the other areas of the GLFW API.
GLFW itself does not ever need to be linked against the Vulkan loader.
By default, GLFW will load the Vulkan loader dynamically at runtime via its standard name:
vulkan-1.dll on Windows,
libvulkan.so.1 on Linux and other Unix-like systems and
libvulkan.1.dylib on macOS.
macOS: GLFW will also look up and search the
Frameworks subdirectory of your application bundle.
If your code is using a Vulkan loader with a different name or in a non-standard location you will need to direct GLFW to it. Pass your version of
vkGetInstanceProcAddr to glfwInitVulkanLoader before initializing GLFW and it will use that function for all Vulkan entry point retrieval. This prevents GLFW from dynamically loading the Vulkan loader.
macOS: To make your application be redistributable you will need to set up the application bundle according to the LunarG SDK documentation. This is explained in more detail in the SDK documentation for macOS.
To have GLFW include the Vulkan header, define GLFW_INCLUDE_VULKAN before including the GLFW header.
If you instead want to include the Vulkan header from a custom location or use your own custom Vulkan header then do this before the GLFW header.
Unless a Vulkan header is included, either by the GLFW header or above it, the following GLFW functions will not be declared, as depend on Vulkan types.
VK_USE_PLATFORM_*_KHR macros do not need to be defined for the Vulkan part of GLFW to work. Define them only if you are using these extensions directly.
If you are linking directly against the Vulkan loader then you can skip this section. The canonical desktop loader library exports all Vulkan core and Khronos extension functions, allowing them to be called directly.
If you are loading the Vulkan loader dynamically instead of linking directly against it, you can check for the availability of a loader and ICD with glfwVulkanSupported.
This function returns
GLFW_TRUE if the Vulkan loader and any minimally functional ICD was found.
If one or both were not found, calling any other Vulkan related GLFW function will generate a GLFW_API_UNAVAILABLE error.
To load any Vulkan core or extension function from the found loader, call glfwGetInstanceProcAddress. To load functions needed for instance creation, pass
NULL as the instance.
Once you have created an instance, you can load from it all other Vulkan core functions and functions from any instance extensions you enabled.
This function in turn calls
vkGetInstanceProcAddr. If that fails, the function falls back to a platform-specific query of the Vulkan loader (i.e.
GetProcAddress). If that also fails, the function returns
NULL. For more information about
vkGetInstanceProcAddr, see the Vulkan documentation.
Vulkan also provides
vkGetDeviceProcAddr for loading device-specific versions of Vulkan function. This function can be retrieved from an instance with glfwGetInstanceProcAddress.
Device-specific functions may execute a little faster, due to not having to dispatch internally based on the device passed to them. For more information about
vkGetDeviceProcAddr, see the Vulkan documentation.
To do anything useful with Vulkan you need to create an instance. If you want to use Vulkan to render to a window, you must enable the instance extensions GLFW requires to create Vulkan surfaces.
To query the instance extensions required, call glfwGetRequiredInstanceExtensions.
These extensions must all be enabled when creating instances that are going to be passed to glfwGetPhysicalDevicePresentationSupport and glfwCreateWindowSurface. The set of extensions will vary depending on platform and may also vary depending on graphics drivers and other factors.
If it fails it will return
NULL and GLFW will not be able to create Vulkan window surfaces. You can still use Vulkan for off-screen rendering and compute work.
If successful the returned array will always include
VK_KHR_surface, so if you don't require any additional extensions you can pass this list directly to the
Additional extensions may be required by future versions of GLFW. You should check whether any extensions you wish to enable are already in the returned array, as it is an error to specify an extension more than once in the
macOS: MoltenVK is (as of July 2022) not yet a fully conformant implementation of Vulkan. As of Vulkan SDK 18.104.22.168, this means you must also enable the
VK_KHR_portability_enumeration instance extension and set the
VK_INSTANCE_CREATE_ENUMERATE_PORTABILITY_BIT_KHR bit in the instance creation info flags for MoltenVK to show up in the list of physical devices. For more information, see the Vulkan and MoltenVK documentation.
Not every queue family of every Vulkan device can present images to surfaces. To check whether a specific queue family of a physical device supports image presentation without first having to create a window and surface, call glfwGetPhysicalDevicePresentationSupport.
VK_KHR_surface extension additionally provides the
vkGetPhysicalDeviceSurfaceSupportKHR function, which performs the same test on an existing Vulkan surface.
Unless you will be using OpenGL or OpenGL ES with the same window as Vulkan, there is no need to create a context. You can disable context creation with the GLFW_CLIENT_API hint.
See Windows without contexts for more information.
You can create a Vulkan surface (as defined by the
VK_KHR_surface extension) for a GLFW window with glfwCreateWindowSurface.
If an OpenGL or OpenGL ES context was created on the window, the context has ownership of the presentation on the window and a Vulkan surface cannot be created.
It is your responsibility to destroy the surface. GLFW does not destroy it for you. Call
vkDestroySurfaceKHR function from the same extension to destroy it.
Last update on Mon Nov 20 2023 for GLFW 3.4.0