// Copyright (c) 2017-2019 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_uniform_buffer_standard_layout.txt[]

*Last Modified Date*::
    2019-01-25
*Contributors*::
  - Graeme Leese, Broadcom
  - Jeff Bolz, NVIDIA
  - Tobias Hector, AMD
  - Jason Ekstrand, Intel
  - Neil Henning, AMD


=== Short Description

Enables tighter array and struct packing to be used with uniform buffers.

=== Description

This extension modifies the alignment rules for uniform buffers, allowing
for tighter packing of arrays and structures.
This allows, for example, the std430 layout, as defined in
https://www.khronos.org/registry/OpenGL/specs/gl/GLSLangSpec.4.60.pdf[GLSL]
to be supported in uniform buffers.

=== New Enum Constants

  * Extending elink:VkStructureType:
  ** ename:VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_UNIFORM_BUFFER_STANDARD_LAYOUT_FEATURES_KHR

=== New Structures

  * slink:VkPhysicalDeviceUniformBufferStandardLayoutFeaturesKHR

=== Issues

None.

=== Version History

  * Revision 1, 2019-01-25 (Graeme Leese)
    - Initial draft