C Specification
Bits which may be set in
VkExternalMemoryProperties::externalMemoryFeatures
, specifying
features of an external memory handle type, are:
typedef enum VkExternalMemoryFeatureFlagBits {
VK_EXTERNAL_MEMORY_FEATURE_DEDICATED_ONLY_BIT = 0x00000001,
VK_EXTERNAL_MEMORY_FEATURE_EXPORTABLE_BIT = 0x00000002,
VK_EXTERNAL_MEMORY_FEATURE_IMPORTABLE_BIT = 0x00000004,
VK_EXTERNAL_MEMORY_FEATURE_DEDICATED_ONLY_BIT_KHR = VK_EXTERNAL_MEMORY_FEATURE_DEDICATED_ONLY_BIT,
VK_EXTERNAL_MEMORY_FEATURE_EXPORTABLE_BIT_KHR = VK_EXTERNAL_MEMORY_FEATURE_EXPORTABLE_BIT,
VK_EXTERNAL_MEMORY_FEATURE_IMPORTABLE_BIT_KHR = VK_EXTERNAL_MEMORY_FEATURE_IMPORTABLE_BIT,
VK_EXTERNAL_MEMORY_FEATURE_FLAG_BITS_MAX_ENUM = 0x7FFFFFFF
} VkExternalMemoryFeatureFlagBits;
or the equivalent
typedef VkExternalMemoryFeatureFlagBits VkExternalMemoryFeatureFlagBitsKHR;
Description
-
VK_EXTERNAL_MEMORY_FEATURE_DEDICATED_ONLY_BIT
specifies that images or buffers created with the specified parameters and handle type must use the mechanisms defined by VkMemoryDedicatedRequirements and VkMemoryDedicatedAllocateInfo to create (or import) a dedicated allocation for the image or buffer. -
VK_EXTERNAL_MEMORY_FEATURE_EXPORTABLE_BIT
specifies that handles of this type can be exported from Vulkan memory objects. -
VK_EXTERNAL_MEMORY_FEATURE_IMPORTABLE_BIT
specifies that handles of this type can be imported as Vulkan memory objects.
Because their semantics in external APIs roughly align with that of an image
or buffer with a dedicated allocation in Vulkan, implementations are
required to report VK_EXTERNAL_MEMORY_FEATURE_DEDICATED_ONLY_BIT
for
the following external handle types:
-
VK_EXTERNAL_MEMORY_HANDLE_TYPE_D3D11_TEXTURE_BIT
-
VK_EXTERNAL_MEMORY_HANDLE_TYPE_D3D11_TEXTURE_KMT_BIT
-
VK_EXTERNAL_MEMORY_HANDLE_TYPE_D3D12_RESOURCE_BIT
-
VK_EXTERNAL_MEMORY_HANDLE_TYPE_ANDROID_HARDWARE_BUFFER_BIT_ANDROID
for images only
Implementations must not report
VK_EXTERNAL_MEMORY_FEATURE_DEDICATED_ONLY_BIT
for buffers with
external handle type
VK_EXTERNAL_MEMORY_HANDLE_TYPE_ANDROID_HARDWARE_BUFFER_BIT_ANDROID
.
Implementations must not report
VK_EXTERNAL_MEMORY_FEATURE_DEDICATED_ONLY_BIT
for images or buffers
with external handle type
VK_EXTERNAL_MEMORY_HANDLE_TYPE_HOST_ALLOCATION_BIT_EXT
, or
VK_EXTERNAL_MEMORY_HANDLE_TYPE_HOST_MAPPED_FOREIGN_MEMORY_BIT_EXT
.
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
Copyright (c) 2014-2019 Khronos Group. This work is licensed under a Creative Commons Attribution 4.0 International License.