# VK_NN_vi_surface(3) Manual Page

## Name

VK_NN_vi_surface - instance extension

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## Registered Extension Number

63

## Revision

1

## Ratification Status

Not ratified

## Extension and Version Dependencies

VK_KHR_surface

## Contact

- Mathias Heyer [GitLab]mheyer

## Other Extension Metadata

Last Modified Date

  2016-12-02

IP Status

  No known IP claims.

Contributors

  - Mathias Heyer, NVIDIA

  - Michael Chock, NVIDIA

  - Yasuhiro Yoshioka, Nintendo

  - Daniel Koch, NVIDIA

## Description

The `VK_NN_vi_surface` extension is an instance extension. It provides a mechanism to create a VkSurfaceKHR object (defined by the `VK_KHR_surface` extension) associated with an `nn`::`vi`::`Layer`.

## New Commands

- vkCreateViSurfaceNN

## New Structures

- VkViSurfaceCreateInfoNN

## New Bitmasks

- VkViSurfaceCreateFlagsNN

## New Enum Constants

- `VK_NN_VI_SURFACE_EXTENSION_NAME`

- `VK_NN_VI_SURFACE_SPEC_VERSION`

- Extending VkStructureType:

  - `VK_STRUCTURE_TYPE_VI_SURFACE_CREATE_INFO_NN`

## Issues

1) Does VI need a way to query for compatibility between a particular physical device (and queue family?) and a specific VI display?

RESOLVED: No. It is currently always assumed that the device and display will always be compatible.

2) VkViSurfaceCreateInfoNN::`pWindow` is intended to store an `nn`::`vi`::`NativeWindowHandle`, but its declared type is a bare `void*` to store the window handle. Why the discrepancy?

RESOLVED: It is for C compatibility. The definition for the VI native window handle type is defined inside the `nn`::`vi` C++ namespace. This prevents its use in C source files. `nn`::`vi`::`NativeWindowHandle` is always defined to be `void*`, so this extension uses `void*` to match.

## Version History

- Revision 1, 2016-12-2 (Michael Chock)

  - Initial draft.

## See Also

No cross-references are available

## Document Notes

For more information, see the Vulkan Specification

This page is a generated document. Fixes and changes should be made to the generator scripts, not directly.

## Copyright

Copyright 2014-2024 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0