VK_NV_sample_mask_override_coverage

Other Extension Metadata

Last Modified Date

2016-12-08

IP Status

No known IP claims.

Interactions and External Dependencies

• This extension provides API support for GL_NV_sample_mask_override_coverage

Contributors

• Daniel Koch, NVIDIA
• Jeff Bolz, NVIDIA

Description

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

• VK_NV_SAMPLE_MASK_OVERRIDE_COVERAGE_EXTENSION_NAME
• VK_NV_SAMPLE_MASK_OVERRIDE_COVERAGE_SPEC_VERSION

New Variable Decoration

• OverrideCoverageNV in SampleMask

New SPIR-V Capabilities

• SampleMaskOverrideCoverageNV

Version History

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