// Copyright (c) 2017 Khronos Group. This work is licensed under a
// Creative Commons Attribution 4.0 International License; see
// http://creativecommons.org/licenses/by/4.0/

include::meta/VK_KHR_16bit_storage.txt[]

*Interactions and External Dependencies*::
  - This extension requires
    https://www.khronos.org/registry/spir-v/extensions/KHR/SPV_KHR_16bit_storage.html[+SPV_KHR_16bit_storage+]
*Last Modified Date*::
    2017-03-23
*IP Status*::
    No known IP claims.
*Contributors*::
  - Alexander Galazin, ARM
  - Jan-Harald Fredriksen, ARM
  - Joerg Wagner, ARM
  - Neil Henning, Codeplay
  - Jeff Bolz, Nvidia
  - Daniel Koch, Nvidia
  - David Neto, Google
  - John Kessenich, Google

The +VK_KHR_16bit_storage+ extension allows use of 16-bit types in shader
input and output interfaces, and push constant blocks.
This extension introduces several new optional features which map to SPIR-V
capabilities and allow access to 16-bit data in code:Block-decorated objects
in the code:Uniform and the code:StorageBuffer storage classes, and objects
in the code:PushConstant storage class.
This extension allows 16-bit variables to be declared and used as
user-defined shader inputs and outputs but does not change location
assignment and component assignment rules.

=== New Enum Constants

  * Extending elink:VkStructureType:
  ** ename:VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_16BIT_STORAGE_FEATURES_KHR

=== New Structures

  * slink:VkPhysicalDevice16BitStorageFeaturesKHR

=== New SPIR-V Capabilities

  * <<spirvenv-capabilities-table-16bitstorage,code:StorageBuffer16BitAccess>>
  * <<spirvenv-capabilities-table-16bitstorage,code:UniformAndStorageBuffer16BitAccess>>
  * <<spirvenv-capabilities-table-16bitstorage,code:StoragePushConstant16>>
  * <<spirvenv-capabilities-table-16bitstorage,code:StorageInputOutput16>>

=== Issues

=== Version History

  * Revision 1, 2017-03-23 (Alexander Galazin)
    - Initial draft