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Registered Extension Number

277

Revision

1

Extension and Version Dependencies

Other Extension Metadata

Last Modified Date

2019-06-01

IP Status

No known IP claims.

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 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

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 (c) 2014-2020 Khronos Group. This work is licensed under a Creative Commons Attribution 4.0 International License.