Registered Extension Number




Ratification Status

Not ratified

Extension and Version Dependencies


Other Extension Metadata

Last Modified Date


IP Status

No known IP claims.

Interactions and External Dependencies
  • Daniel Koch, NVIDIA

  • Jeff Bolz, NVIDIA


This extension adds support for the following SPIR-V extension in Vulkan:

  • SPV_NV_sample_mask_override_coverage

The extension provides access to the OverrideCoverageNV decoration under the SampleMaskOverrideCoverageNV capability. Adding this decoration to a variable with the SampleMask builtin decoration allows the shader to modify the coverage mask and affect which samples are used to process the fragment.

When using GLSL source-based shader languages, the override_coverage layout qualifier from GL_NV_sample_mask_override_coverage maps to the OverrideCoverageNV decoration. To use the override_coverage layout qualifier in GLSL the GL_NV_sample_mask_override_coverage extension must be enabled. Behavior is described in the GL_NV_sample_mask_override_coverage extension spec.

New Enum Constants



New Variable Decoration

New SPIR-V Capabilities

Version History

  • Revision 1, 2016-12-08 (Piers Daniell)

    • Internal revisions

See Also

No cross-references are available

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.

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SPDX-License-Identifier: CC-BY-4.0