This extension adds Vulkan support for the SPV_KHR_terminate_invocation SPIR-V extension. That SPIR-V extension provides a new instruction, OpTerminateInvocation, which causes a shader invocation to immediately terminate and sets the coverage of shaded samples to 0; only previously executed instructions will have observable effects. The OpTerminateInvocation instruction, along with the OpDemoteToHelperInvocation instruction from the VK_EXT_shader_demote_to_helper_invocation extension, together replace the OpKill instruction, which could behave like either of these instructions. OpTerminateInvocation provides the behavior required by the GLSL discard statement, and should be used when available by GLSL compilers and applications that need the GLSL discard behavior.

Promotion to Vulkan 1.3

Functionality in this extension is included in core Vulkan 1.3, with the KHR suffix omitted. The original type, enum and command names are still available as aliases of the core functionality.

VK_KHR_shader_terminate_invocation

Name String

VK_KHR_shader_terminate_invocation

Extension Type

Device extension

Registered Extension Number

216

Revision

1

Extension and Version Dependencies

VK_KHR_get_physical_device_properties2 or Version 1.1

Deprecation state

• Promoted to Vulkan 1.3

Contact

• Jesse Hall critsec

Other Extension Metadata

Last Modified Date

2020-08-11

Interactions and External Dependencies

• Promoted to Vulkan 1.3 Core
• Requires the SPV_KHR_terminate_invocation SPIR-V extension.

IP Status

No known IP claims.

Contributors

• Alan Baker, Google
• Jeff Bolz, NVIDIA
• Jesse Hall, Google
• Ralph Potter, Samsung
• Tom Olson, Arm