To query a 64-bit buffer device address value through which buffer memory can be accessed in a shader, call:
VkDeviceAddress vkGetBufferDeviceAddressEXT( VkDevice device, const VkBufferDeviceAddressInfoEXT* pInfo);
deviceis the logical device that the buffer was created on.
pInfois a pointer to a VkBufferDeviceAddressInfoEXT structure specifying the buffer to retrieve an address for.
The 64-bit return value is an address of the start of
The address range starting at this value and whose size is the size of the
buffer can be used in a shader to access the memory bound to that buffer,
SPV_EXT_physical_storage_buffer extension and the
PhysicalStorageBufferEXT storage class.
For example, this value can be stored in a uniform buffer, and the shader
can read the value from the uniform buffer and use it to do a dependent
read/write to this buffer.
A value of zero is reserved as a “null” pointer and must not be returned
as a valid buffer device address.
All loads, stores, and atomics in a shader through
PhysicalStorageBufferEXT pointers must access addresses in the address
range of some buffer.
If the buffer was created with a non-zero value of
deviceAddress, the return
value will be the same address.
For more information, see the Vulkan Specification
This page is extracted from the Vulkan Specification. Fixes and changes should be made to the Specification, not directly.
Copyright (c) 2014-2019 Khronos Group. This work is licensed under a Creative Commons Attribution 4.0 International License.