Registered Extension Number

277

Revision

1

Extension and Version Dependencies

Deprecation state

Contact

Other Extension Metadata

Last Modified Date

2019-06-01

Interactions and External Dependencies
  • Promoted to Vulkan 1.3 Core

IP Status

No known IP claims.

Interactions and External Dependencies
Contributors
  • Jeff Bolz, NVIDIA

Description

This extension adds Vulkan support for the SPV_EXT_demote_to_helper_invocation SPIR-V extension. That SPIR-V extension provides a new instruction OpDemoteToHelperInvocationEXT allowing shaders to “demote” a fragment shader invocation to behave like a helper invocation for its duration. The demoted invocation will have no further side effects and will not output to the framebuffer, but remains active and can participate in computing derivatives and in group operations. This is a better match for the “discard” instruction in HLSL.

New Structures

New Enum Constants

  • VK_EXT_SHADER_DEMOTE_TO_HELPER_INVOCATION_EXTENSION_NAME

  • VK_EXT_SHADER_DEMOTE_TO_HELPER_INVOCATION_SPEC_VERSION

  • Extending VkStructureType:

    • VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SHADER_DEMOTE_TO_HELPER_INVOCATION_FEATURES_EXT

New SPIR-V Capability

Promotion to Vulkan 1.3

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

Version History

  • Revision 1, 2019-06-01 (Jeff Bolz)

    • Initial draft

See Also

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 2014-2022 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0