Vulkan-Docs/chapters/VK_NN_vi_surface/platformCreateSurface_vi.txt

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[[platformCreateSurface_vi,platformCreateSurface_vi]]
=== VI Platform
[open,refpage='vkCreateViSurfaceNN',desc='Create a slink:VkSurfaceKHR object for a VI layer',type='protos']
--
To create a sname:VkSurfaceKHR object for an code:nn::code:vi::code:Layer,
query the layer's native handle using
code:nn::code:vi::code:GetNativeWindow, and then call:
include::../../api/protos/vkCreateViSurfaceNN.txt[]
* pname:instance is the instance with which to associate the surface.
* pname:pCreateInfo is a pointer to an instance of the
sname:VkViSurfaceCreateInfoNN structure containing parameters affecting
the creation of the surface object.
* pname:pAllocator is the allocator used for host memory allocated for the
surface object when there is no more specific allocator available (see
<<memory-allocation,Memory Allocation>>).
* pname:pSurface points to a slink:VkSurfaceKHR handle in which the
created surface object is returned.
During the lifetime of a surface created using a particular
code:nn::code:vi::code:NativeWindowHandle any attempts to create another
surface for the same code:nn::code:vi::code:Layer and any attempts to
connect to the same code:nn::code:vi::code:Layer through other platform
mechanisms will have undefined results.
The pname:currentExtent of a VI surface is always undefined.
Applications are expected to choose an appropriate size for the swapchain's
pname:imageExtent (e.g., by matching the the result of a call to
code:nn::code:vi::code:GetDisplayResolution).
include::../../validity/protos/vkCreateViSurfaceNN.txt[]
--
[open,refpage='VkViSurfaceCreateInfoNN',desc='Structure specifying parameters of a newly created VI surface object',type='structs']
--
The sname:VkViSurfaceCreateInfoNN structure is defined as:
include::../../api/structs/VkViSurfaceCreateInfoNN.txt[]
* pname:sType is the type of this structure.
* pname:pNext is `NULL` or a pointer to an extension-specific structure.
* pname:flags is reserved for future use.
* pname:window is the code:nn::code:vi::code:NativeWindowHandle for the
code:nn::code:vi::code:Layer with which to associate the surface.
.Valid Usage
****
* [[VUID-VkViSurfaceCreateInfoNN-window-01318]]
pname:window must: be a valid code:nn::code:vi::code:NativeWindowHandle
****
include::../../validity/structs/VkViSurfaceCreateInfoNN.txt[]
--