C Specification

The VkCoarseSampleOrderCustomNV structure is defined as:

// Provided by VK_NV_shading_rate_image
typedef struct VkCoarseSampleOrderCustomNV {
    VkShadingRatePaletteEntryNV        shadingRate;
    uint32_t                           sampleCount;
    uint32_t                           sampleLocationCount;
    const VkCoarseSampleLocationNV*    pSampleLocations;
} VkCoarseSampleOrderCustomNV;


  • shadingRate is a shading rate palette entry that identifies the fragment width and height for the combination of fragment area and per-pixel coverage sample count to control.

  • sampleCount identifies the per-pixel coverage sample count for the combination of fragment area and coverage sample count to control.

  • sampleLocationCount specifies the number of sample locations in the custom ordering.

  • pSampleLocations is a pointer to an array of VkCoarseSampleLocationNV structures specifying the location of each sample in the custom ordering.


The VkCoarseSampleOrderCustomNV structure is used with a coverage sample ordering type of VK_COARSE_SAMPLE_ORDER_TYPE_CUSTOM_NV to specify the order of coverage samples for one combination of fragment width, fragment height, and coverage sample count.

When using a custom sample ordering, element j in pSampleLocations specifies a specific pixel location and sample index that corresponds to coverage index j in the multi-pixel fragment.

Valid Usage
  • VUID-VkCoarseSampleOrderCustomNV-shadingRate-02073
    shadingRate must be a shading rate that generates fragments with more than one pixel

  • VUID-VkCoarseSampleOrderCustomNV-sampleCount-02074
    sampleCount must correspond to a sample count enumerated in VkSampleCountFlags whose corresponding bit is set in VkPhysicalDeviceLimits::framebufferNoAttachmentsSampleCounts

  • VUID-VkCoarseSampleOrderCustomNV-sampleLocationCount-02075
    sampleLocationCount must be equal to the product of sampleCount, the fragment width for shadingRate, and the fragment height for shadingRate

  • VUID-VkCoarseSampleOrderCustomNV-sampleLocationCount-02076
    sampleLocationCount must be less than or equal to the value of VkPhysicalDeviceShadingRateImagePropertiesNV::shadingRateMaxCoarseSamples

  • VUID-VkCoarseSampleOrderCustomNV-pSampleLocations-02077
    The array pSampleLocations must contain exactly one entry for every combination of valid values for pixelX, pixelY, and sample in the structure VkCoarseSampleOrderCustomNV

Valid Usage (Implicit)
  • VUID-VkCoarseSampleOrderCustomNV-shadingRate-parameter
    shadingRate must be a valid VkShadingRatePaletteEntryNV value

  • VUID-VkCoarseSampleOrderCustomNV-pSampleLocations-parameter
    pSampleLocations must be a valid pointer to an array of sampleLocationCount VkCoarseSampleLocationNV structures

  • VUID-VkCoarseSampleOrderCustomNV-sampleLocationCount-arraylength
    sampleLocationCount must be greater than 0

See Also

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 2014-2023 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0