# VkFragmentShadingRateNV(3) Manual Page

## Name

VkFragmentShadingRateNV - Enumeration with fragment shading rates

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## C Specification

If the `fragmentShadingRateEnums` feature is enabled, fragment shading rates may be specified using the VkFragmentShadingRateNV enumerated type defined as:

    // Provided by VK_NV_fragment_shading_rate_enums
    typedef enum VkFragmentShadingRateNV {
        VK_FRAGMENT_SHADING_RATE_1_INVOCATION_PER_PIXEL_NV = 0,
        VK_FRAGMENT_SHADING_RATE_1_INVOCATION_PER_1X2_PIXELS_NV = 1,
        VK_FRAGMENT_SHADING_RATE_1_INVOCATION_PER_2X1_PIXELS_NV = 4,
        VK_FRAGMENT_SHADING_RATE_1_INVOCATION_PER_2X2_PIXELS_NV = 5,
        VK_FRAGMENT_SHADING_RATE_1_INVOCATION_PER_2X4_PIXELS_NV = 6,
        VK_FRAGMENT_SHADING_RATE_1_INVOCATION_PER_4X2_PIXELS_NV = 9,
        VK_FRAGMENT_SHADING_RATE_1_INVOCATION_PER_4X4_PIXELS_NV = 10,
        VK_FRAGMENT_SHADING_RATE_2_INVOCATIONS_PER_PIXEL_NV = 11,
        VK_FRAGMENT_SHADING_RATE_4_INVOCATIONS_PER_PIXEL_NV = 12,
        VK_FRAGMENT_SHADING_RATE_8_INVOCATIONS_PER_PIXEL_NV = 13,
        VK_FRAGMENT_SHADING_RATE_16_INVOCATIONS_PER_PIXEL_NV = 14,
        VK_FRAGMENT_SHADING_RATE_NO_INVOCATIONS_NV = 15,
    } VkFragmentShadingRateNV;

## Description

- `VK_FRAGMENT_SHADING_RATE_1_INVOCATION_PER_PIXEL_NV` specifies a fragment size of 1x1 pixels.

- `VK_FRAGMENT_SHADING_RATE_1_INVOCATION_PER_1X2_PIXELS_NV` specifies a fragment size of 1x2 pixels.

- `VK_FRAGMENT_SHADING_RATE_1_INVOCATION_PER_2X1_PIXELS_NV` specifies a fragment size of 2x1 pixels.

- `VK_FRAGMENT_SHADING_RATE_1_INVOCATION_PER_2X2_PIXELS_NV` specifies a fragment size of 2x2 pixels.

- `VK_FRAGMENT_SHADING_RATE_1_INVOCATION_PER_2X4_PIXELS_NV` specifies a fragment size of 2x4 pixels.

- `VK_FRAGMENT_SHADING_RATE_1_INVOCATION_PER_4X2_PIXELS_NV` specifies a fragment size of 4x2 pixels.

- `VK_FRAGMENT_SHADING_RATE_1_INVOCATION_PER_4X4_PIXELS_NV` specifies a fragment size of 4x4 pixels.

- `VK_FRAGMENT_SHADING_RATE_2_INVOCATIONS_PER_PIXEL_NV` specifies a fragment size of 1x1 pixels, with two fragment shader invocations per fragment.

- `VK_FRAGMENT_SHADING_RATE_4_INVOCATIONS_PER_PIXEL_NV` specifies a fragment size of 1x1 pixels, with four fragment shader invocations per fragment.

- `VK_FRAGMENT_SHADING_RATE_8_INVOCATIONS_PER_PIXEL_NV` specifies a fragment size of 1x1 pixels, with eight fragment shader invocations per fragment.

- `VK_FRAGMENT_SHADING_RATE_16_INVOCATIONS_PER_PIXEL_NV` specifies a fragment size of 1x1 pixels, with sixteen fragment shader invocations per fragment.

- `VK_FRAGMENT_SHADING_RATE_NO_INVOCATIONS_NV` specifies that any portions of a primitive that use that shading rate should be discarded without invoking any fragment shader.

To use the shading rates `VK_FRAGMENT_SHADING_RATE_2_INVOCATIONS_PER_PIXEL_NV`, `VK_FRAGMENT_SHADING_RATE_4_INVOCATIONS_PER_PIXEL_NV`, `VK_FRAGMENT_SHADING_RATE_8_INVOCATIONS_PER_PIXEL_NV`, and `VK_FRAGMENT_SHADING_RATE_16_INVOCATIONS_PER_PIXEL_NV` as a pipeline, primitive, or attachment shading rate, the `supersampleFragmentShadingRates` feature must be enabled. To use the shading rate `VK_FRAGMENT_SHADING_RATE_NO_INVOCATIONS_NV` as a pipeline, primitive, or attachment shading rate, the `noInvocationFragmentShadingRates` feature must be enabled.

## See Also

VK_NV_fragment_shading_rate_enums, VkPipelineFragmentShadingRateEnumStateCreateInfoNV, vkCmdSetFragmentShadingRateEnumNV

## 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 2014-2024 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0