# VkExternalMemoryFeatureFlagBitsNV(3) Manual Page

## Name

VkExternalMemoryFeatureFlagBitsNV - Bitmask specifying external memory features

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## C Specification

Bits which can be set in VkExternalImageFormatPropertiesNV::`externalMemoryFeatures`, indicating properties of the external memory handle type, are:

    // Provided by VK_NV_external_memory_capabilities
    typedef enum VkExternalMemoryFeatureFlagBitsNV {
        VK_EXTERNAL_MEMORY_FEATURE_DEDICATED_ONLY_BIT_NV = 0x00000001,
        VK_EXTERNAL_MEMORY_FEATURE_EXPORTABLE_BIT_NV = 0x00000002,
        VK_EXTERNAL_MEMORY_FEATURE_IMPORTABLE_BIT_NV = 0x00000004,
    } VkExternalMemoryFeatureFlagBitsNV;

## Description

- `VK_EXTERNAL_MEMORY_FEATURE_DEDICATED_ONLY_BIT_NV` specifies that external memory of the specified type must be created as a dedicated allocation when used in the manner specified.

- `VK_EXTERNAL_MEMORY_FEATURE_EXPORTABLE_BIT_NV` specifies that the implementation supports exporting handles of the specified type.

- `VK_EXTERNAL_MEMORY_FEATURE_IMPORTABLE_BIT_NV` specifies that the implementation supports importing handles of the specified type.

## See Also

VK_NV_external_memory_capabilities, VkExternalImageFormatPropertiesNV, VkExternalMemoryFeatureFlagsNV, vkGetPhysicalDeviceExternalImageFormatPropertiesNV

## 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