# VkPhysicalDeviceVariablePointersFeatures(3) Manual Page

## Name

VkPhysicalDeviceVariablePointersFeatures - Structure describing variable pointers features that can be supported by an implementation

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## C Specification

The `VkPhysicalDeviceVariablePointersFeatures` structure is defined as:

    // Provided by VK_VERSION_1_1
    typedef struct VkPhysicalDeviceVariablePointersFeatures {
        VkStructureType    sType;
        void*              pNext;
        VkBool32           variablePointersStorageBuffer;
        VkBool32           variablePointers;
    } VkPhysicalDeviceVariablePointersFeatures;

    // Provided by VK_VERSION_1_1
    typedef VkPhysicalDeviceVariablePointersFeatures VkPhysicalDeviceVariablePointerFeatures;

or the equivalent

    // Provided by VK_KHR_variable_pointers
    typedef VkPhysicalDeviceVariablePointersFeatures VkPhysicalDeviceVariablePointersFeaturesKHR;

    // Provided by VK_KHR_variable_pointers
    typedef VkPhysicalDeviceVariablePointersFeatures VkPhysicalDeviceVariablePointerFeaturesKHR;

## Members

This structure describes the following features:

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

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

## Description

- `variablePointersStorageBuffer` specifies whether the implementation supports the SPIR-V `VariablePointersStorageBuffer` capability. When this feature is not enabled, shader modules must not declare the `SPV_KHR_variable_pointers` extension or the `VariablePointersStorageBuffer` capability.

- `variablePointers` specifies whether the implementation supports the SPIR-V `VariablePointers` capability. When this feature is not enabled, shader modules must not declare the `VariablePointers` capability.

If the `VkPhysicalDeviceVariablePointersFeatures` structure is included in the `pNext` chain of the VkPhysicalDeviceFeatures2 structure passed to vkGetPhysicalDeviceFeatures2, it is filled in to indicate whether each corresponding feature is supported. `VkPhysicalDeviceVariablePointersFeatures` can also be used in the `pNext` chain of VkDeviceCreateInfo to selectively enable these features.

Valid Usage

- VUID-VkPhysicalDeviceVariablePointersFeatures-variablePointers-01431
  If `variablePointers` is enabled then `variablePointersStorageBuffer` must also be enabled

Valid Usage (Implicit)

- VUID-VkPhysicalDeviceVariablePointersFeatures-sType-sType
  `sType` must be `VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_VARIABLE_POINTERS_FEATURES`

## See Also

VK_KHR_variable_pointers, VK_VERSION_1_1, VkBool32, 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 2014-2024 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0