# VkPipelineCoverageReductionStateCreateInfoNV(3) Manual Page

## Name

VkPipelineCoverageReductionStateCreateInfoNV - Structure specifying parameters controlling coverage reduction

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## C Specification

The `VkPipelineCoverageReductionStateCreateInfoNV` structure is defined as:

    // Provided by VK_NV_coverage_reduction_mode
    typedef struct VkPipelineCoverageReductionStateCreateInfoNV {
        VkStructureType                                  sType;
        const void*                                      pNext;
        VkPipelineCoverageReductionStateCreateFlagsNV    flags;
        VkCoverageReductionModeNV                        coverageReductionMode;
    } VkPipelineCoverageReductionStateCreateInfoNV;

## Members

- `sType` is a VkStructureType value identifying this structure.

- `pNext` is `NULL` or a pointer to a structure extending this structure.

- `flags` is reserved for future use.

- `coverageReductionMode` is a VkCoverageReductionModeNV value controlling how color sample coverage is generated from pixel coverage.

## Description

If this structure is not included in the `pNext` chain, or if the extension is not enabled, the default coverage reduction mode is inferred as follows:

- If the `VK_NV_framebuffer_mixed_samples` extension is enabled, then it is as if the `coverageReductionMode` is `VK_COVERAGE_REDUCTION_MODE_MERGE_NV`.

- If the `VK_AMD_mixed_attachment_samples` extension is enabled, then it is as if the `coverageReductionMode` is `VK_COVERAGE_REDUCTION_MODE_TRUNCATE_NV`.

- If both `VK_NV_framebuffer_mixed_samples` and `VK_AMD_mixed_attachment_samples` are enabled, then the default coverage reduction mode is implementation-dependent.

Valid Usage (Implicit)

- VUID-VkPipelineCoverageReductionStateCreateInfoNV-sType-sType
  `sType` must be `VK_STRUCTURE_TYPE_PIPELINE_COVERAGE_REDUCTION_STATE_CREATE_INFO_NV`

- VUID-VkPipelineCoverageReductionStateCreateInfoNV-flags-zerobitmask
  `flags` must be `0`

- VUID-VkPipelineCoverageReductionStateCreateInfoNV-coverageReductionMode-parameter
  `coverageReductionMode` must be a valid VkCoverageReductionModeNV value

## See Also

VK_NV_coverage_reduction_mode, VkCoverageReductionModeNV, VkPipelineCoverageReductionStateCreateFlagsNV, VkStructureType

## Document Notes

For more information, see the Vulkan Specification

This page is extracted from the Vulkan Specification. Fixes and changes should be made to the Specification, not directly.

## Copyright

Copyright 2014-2025 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0