vkGetInstanceProcAddr

Function pointers for all Vulkan commands can be obtained by calling:

PFN_vkVoidFunction vkGetInstanceProcAddr(
    VkInstance instance,
    const char* pName);

pub fn get_instance_proc_addr(
    instance: vk::Instance,
    p_name: *const c_char,
) -> PFN_vkVoidFunction;

• instance is the instance that the function pointer will be compatible with, or NULL for commands not dependent on any instance.
• pName is the name of the command to obtain.

vkGetInstanceProcAddr itself is obtained in a platform- and loader- specific manner. Typically, the loader library will export this command as a function symbol, so applications can link against the loader library, or load it dynamically and look up the symbol using platform-specific APIs.

The table below defines the various use cases for vkGetInstanceProcAddr and expected return value (fp is function pointer) for each case. A valid returned function pointer (fp) must not be NULL.

The returned function pointer is of type PFN_vkVoidFunction, and must be cast to the type of the command being queried before use.