VK_NV_fragment_coverage_to_color(3)

# VK_NV_fragment_coverage_to_color(3) Manual Page

## Name

VK_NV_fragment_coverage_to_color - device extension

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## Registered Extension Number

150

## Revision

1

## Ratification Status

Not ratified

## Extension and Version Dependencies

None

## Contact

- Jeff Bolz jeffbolznv

## Other Extension Metadata

Last Modified Date

  2017-05-21

Contributors

  - Jeff Bolz, NVIDIA

## Description

This extension allows the fragment coverage value, represented as an integer bitmask, to be substituted for a color output being written to a single-component color attachment with integer components (e.g. `VK_FORMAT_R8_UINT`). The functionality provided by this extension is different from simply writing the `SampleMask` fragment shader output, in that the coverage value written to the framebuffer is taken after stencil test and depth test, as well as after fragment operations such as alpha-to-coverage.

This functionality may be useful for deferred rendering algorithms, where the second pass needs to know which samples belong to which original fragments.

## New Structures

- Extending VkPipelineMultisampleStateCreateInfo:

  - VkPipelineCoverageToColorStateCreateInfoNV

## New Bitmasks

- VkPipelineCoverageToColorStateCreateFlagsNV

## New Enum Constants

- `VK_NV_FRAGMENT_COVERAGE_TO_COLOR_EXTENSION_NAME`

- `VK_NV_FRAGMENT_COVERAGE_TO_COLOR_SPEC_VERSION`

- Extending VkStructureType:

  - `VK_STRUCTURE_TYPE_PIPELINE_COVERAGE_TO_COLOR_STATE_CREATE_INFO_NV`

## Version History

- Revision 1, 2017-05-21 (Jeff Bolz)

  - Internal revisions

## See Also

VkPipelineCoverageToColorStateCreateFlagsNV, VkPipelineCoverageToColorStateCreateInfoNV

## 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

Copyright 2014-2023 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0