Vulkan-Docs/appendices/VK_KHR_shader_clock.txt

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include::{generated}/meta/VK_KHR_shader_clock.txt[]
*Last Modified Date*::
2019-4-25
*IP Status*::
No known IP claims.
*Interactions and External Dependencies*::
- This extension requires
https://www.khronos.org/registry/spir-v/extensions/KHR/SPV_KHR_shader_clock.html[+SPV_KHR_shader_clock+]
*Contributors*::
- Aaron Hagan, AMD
- Daniel Koch, NVIDIA
This extension advertises the SPIR-V code:ShaderClockKHR capability for
Vulkan, which allows a shader to query a real-time or monotonically
incrementing counter at the subgroup level or across the device level.
The two valid SPIR-V scopes for code:OpReadClockKHR are code:Subgroup and
code:Device.
=== New Object Types
None.
=== New Enum Constants
* Extending elink:VkStructureType:
** ename:VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SHADER_CLOCK_FEATURES_KHR
=== New SPIR-V Capabilities
* <<spirvenv-capabilities-table-shaderclock, code:ShaderClockKHR>>
=== New Structures
* slink:VkPhysicalDeviceShaderClockFeaturesKHR
=== Version History
* Revision 1, 2019-4-25 (Aaron Hagan)
- Initial revision