# VkSubsampledImageFormatPropertiesEXT(3) Manual Page

## Name

VkSubsampledImageFormatPropertiesEXT - Structure specifying image descriptor count for subsampled images

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## C Specification

To determine the number of image descriptors required to support a subsampled image created with VK_IMAGE_CREATE_SUBSAMPLED_BIT_EXT, add VkSubsampledImageFormatPropertiesEXT to the `pNext` chain of the VkImageFormatProperties2 structure in a call to `vkGetPhysicalDeviceImageFormatProperties2`.

The `VkSubsampledImageFormatPropertiesEXT` structure is defined as:

    // Provided by VK_EXT_descriptor_heap with VK_EXT_fragment_density_map
    typedef struct VkSubsampledImageFormatPropertiesEXT {
        VkStructureType    sType;
        const void*        pNext;
        uint32_t           subsampledImageDescriptorCount;
    } VkSubsampledImageFormatPropertiesEXT;

## Members

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

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

- `subsampledImageDescriptorCount` is the number of image descriptors that the implementation uses to access the image.

## Description

Valid Usage (Implicit)

- VUID-VkSubsampledImageFormatPropertiesEXT-sType-sType
  `sType` must be VK_STRUCTURE_TYPE_SUBSAMPLED_IMAGE_FORMAT_PROPERTIES_EXT

Structure Chaining

Extends the structure

  - VkImageFormatProperties2

## See Also

VK_EXT_descriptor_heap, VK_EXT_fragment_density_map, 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 2014-2026 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0