# VkExternalMemoryFeatureFlagBitsNV(3) Manual Page

## Name

VkExternalMemoryFeatureFlagBitsNV - Bitmask specifying external memory features

## C Specification

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

    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,
        VK_EXTERNAL_MEMORY_FEATURE_FLAG_BITS_MAX_ENUM_NV = 0x7FFFFFFF
    } 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

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 (c) 2014-2020 Khronos Group. This work is licensed under a Creative Commons Attribution 4.0 International License.